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robfinch |
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; Enhanced BASIC to assemble under 6502 simulator, $ver 2.22
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; $E7E1 $E7CF $E7C6 $E7D3 $E7D1 $E7D5 $E7CF $E81E $E825
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; 2.00 new revision numbers start here
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; 2.01 fixed LCASE$() and UCASE$()
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; 2.02 new get value routine done
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; 2.03 changed RND() to galoise method
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; 2.04 fixed SPC()
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; 2.05 new get value routine fixed
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; 2.06 changed USR() code
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; 2.07 fixed STR$()
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; 2.08 changed INPUT and READ to remove need for $00 start to input buffer
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; 2.09 fixed RND()
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; 2.10 integrated missed changes from an earlier version
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; 2.20 added ELSE to IF .. THEN and fixed IF .. GOTO to cause error
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; 2.21 fixed IF .. THEN RETURN to not cause error
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; 2.22 fixed RND() breaking the get byte routine
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macro nat
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.byte $42
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xce
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cpu RTF65002
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endm
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macro emm
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sec
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xce
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endm
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macro emm816
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clc
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xce
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cpu W65C816S
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endm
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| 37 |
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| 38 |
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DisplayChar = $FFFF8000
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KeybdCheckForKeyDirect = $FFFF8004
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| 40 |
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KeybdGetCharDirect = $FFFF8008
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| 41 |
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KeybdGetChar = $FFFF800C
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| 42 |
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KeybdCheckForChar = $FFFF8010
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RequestIOFocus = $FFFF8014
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ReleaseIOFocus = $FFFF8018
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ClearScreen = $FFFF801C
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HomeCursor = $FFFF8020
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| 47 |
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ExitTask = $FFFF8024
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SetKeyboardEcho = $FFFF8028
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| 49 |
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Sleep = $FFFF802C
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LoadFile = $FFFF8030
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| 51 |
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SaveFile = $FFFF8034
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| 52 |
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ICacheInvalidateAll = $FFFF8038
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ICacheInvalidateLine = $FFFF803C
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LEDS =$FFDC0600
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OUTNDX EQU 0x778
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INPNDX EQU 0x779
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FILENAME EQU 0x6C0
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FILEBUF EQU 0x05F60000
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; zero page use ..
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LAB_WARM = $00 ; BASIC warm start entry point
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Wrmjpl = LAB_WARM+1; BASIC warm start vector jump low byte
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Wrmjph = LAB_WARM+2; BASIC warm start vector jump high byte
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Usrjmp = $0A ; USR function JMP address
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Usrjpl = Usrjmp+1 ; USR function JMP vector low byte
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Usrjph = Usrjmp+2 ; USR function JMP vector high byte
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| 71 |
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Nullct = $0D ; nulls output after each line
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| 72 |
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TPos = $0E ; BASIC terminal position byte
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TWidth = $0F ; BASIC terminal width byte
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| 74 |
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Iclim = $10 ; input column limit
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Itempl = $11 ; temporary integer low byte
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Itemph = Itempl+1 ; temporary integer high byte
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| 78 |
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nums_1 = Itempl ; number to bin/hex string convert MSB
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nums_2 = nums_1+1 ; number to bin/hex string convert
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nums_3 = nums_1+2 ; number to bin/hex string convert LSB
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| 82 |
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Srchc = $5B ; search character
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| 83 |
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Temp3 = Srchc ; temp byte used in number routines
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Scnquo = $5C ; scan-between-quotes flag
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Asrch = Scnquo ; alt search character
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XOAw_l = Srchc ; eXclusive OR, OR and AND word low byte
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XOAw_h = Scnquo ; eXclusive OR, OR and AND word high byte
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| 90 |
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Ibptr = $5D ; input buffer pointer
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Dimcnt = Ibptr ; # of dimensions
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| 92 |
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Tindx = Ibptr ; token index
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| 94 |
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Defdim = $5E ; default DIM flag
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| 95 |
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Dtypef = $5F ; data type flag, $FF=string, $00=numeric
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Oquote = $60 ; open quote flag (b7) (Flag: DATA scan; LIST quote; memory)
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Gclctd = $60 ; garbage collected flag
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| 98 |
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Sufnxf = $61 ; subscript/FNX flag, 1xxx xxx = FN(0xxx xxx)
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Imode = $62 ; input mode flag, $00=INPUT, $80=READ
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Cflag = $63 ; comparison evaluation flag
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TabSiz = $64 ; TAB step size (was input flag)
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next_s = $65 ; next descriptor stack address
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; these two bytes form a word pointer to the item
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; currently on top of the descriptor stack
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last_sl = $66 ; last descriptor stack address low byte
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last_sh = $67 ; last descriptor stack address high byte (always $00)
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des_sk = $68 ; descriptor stack start address (temp strings)
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; = $70 ; End of descriptor stack
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ut1_pl = $71 ; utility pointer 1 low byte
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ut1_ph = ut1_pl+1 ; utility pointer 1 high byte
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ut2_pl = $73 ; utility pointer 2 low byte
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ut2_ph = ut2_pl+1 ; utility pointer 2 high byte
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| 121 |
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Temp_2 = ut1_pl ; temp byte for block move
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FACt_1 = $75 ; FAC temp mantissa1
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FACt_2 = FACt_1+1 ; FAC temp mantissa2
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FACt_3 = FACt_2+1 ; FAC temp mantissa3
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| 127 |
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dims_l = FACt_2 ; array dimension size low byte
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dims_h = FACt_3 ; array dimension size high byte
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TempB = $78 ; temp page 0 byte
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Smeml = $79 ; start of mem low byte (Start-of-Basic)
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Smemh = Smeml+1 ; start of mem high byte (Start-of-Basic)
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Svarl = $7B ; start of vars low byte (Start-of-Variables)
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Svarh = Svarl+1 ; start of vars high byte (Start-of-Variables)
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Sarryl = $7D ; var mem end low byte (Start-of-Arrays)
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Sarryh = Sarryl+1 ; var mem end high byte (Start-of-Arrays)
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Earryl = $7F ; array mem end low byte (End-of-Arrays)
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Earryh = Earryl+1 ; array mem end high byte (End-of-Arrays)
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Sstorl = $81 ; string storage low byte (String storage (moving down))
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Sstorh = Sstorl+1 ; string storage high byte (String storage (moving down))
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Sutill = $83 ; string utility ptr low byte
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Sutilh = Sutill+1 ; string utility ptr high byte
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Ememl = $85 ; end of mem low byte (Limit-of-memory)
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Ememh = Ememl+1 ; end of mem high byte (Limit-of-memory)
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Clinel = $87 ; current line low byte (Basic line number)
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Clineh = Clinel+1 ; current line high byte (Basic line number)
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Blinel = $89 ; break line low byte (Previous Basic line number)
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Blineh = Blinel+1 ; break line high byte (Previous Basic line number)
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Cpntrl = $8B ; continue pointer low byte
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Cpntrh = Cpntrl+1 ; continue pointer high byte
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Dlinel = $8D ; current DATA line low byte
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Dlineh = Dlinel+1 ; current DATA line high byte
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Dptrl = $8F ; DATA pointer low byte
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Dptrh = Dptrl+1 ; DATA pointer high byte
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Rdptrl = $91 ; read pointer low byte
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Rdptrh = Rdptrl+1 ; read pointer high byte
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Varnm1 = $93 ; current var name 1st byte
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Varnm2 = Varnm1+1 ; current var name 2nd byte
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Cvaral = $95 ; current var address low byte
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Cvarah = Cvaral+1 ; current var address high byte
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Frnxtl = $97 ; var pointer for FOR/NEXT low byte
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Frnxth = Frnxtl+1 ; var pointer for FOR/NEXT high byte
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Tidx1 = Frnxtl ; temp line index
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Lvarpl = Frnxtl ; let var pointer low byte
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Lvarph = Frnxth ; let var pointer high byte
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prstk = $99 ; precedence stacked flag
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comp_f = $9B ; compare function flag, bits 0,1 and 2 used
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; bit 2 set if >
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; bit 1 set if =
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; bit 0 set if <
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func_l = $9C ; function pointer low byte
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func_h = func_l+1 ; function pointer high byte
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garb_l = func_l ; garbage collection working pointer low byte
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garb_h = func_h ; garbage collection working pointer high byte
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des_2l = $9E ; string descriptor_2 pointer low byte
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des_2h = des_2l+1 ; string descriptor_2 pointer high byte
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g_step = $A0 ; garbage collect step size
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Fnxjmp = $A1 ; jump vector for functions
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Fnxjpl = Fnxjmp+1 ; functions jump vector low byte
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Fnxjph = Fnxjmp+2 ; functions jump vector high byte
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g_indx = Fnxjpl ; garbage collect temp index
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FAC2_r = $A3 ; FAC2 rounding byte
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Adatal = $A4 ; array data pointer low byte
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Adatah = Adatal+1 ; array data pointer high byte
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Nbendl = Adatal ; new block end pointer low byte
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Nbendh = Adatah ; new block end pointer high byte
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Obendl = $A6 ; old block end pointer low byte
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Obendh = Obendl+1 ; old block end pointer high byte
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numexp = $A8 ; string to float number exponent count
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expcnt = $A9 ; string to float exponent count
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numbit = numexp ; bit count for array element calculations
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numdpf = $AA ; string to float decimal point flag
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expneg = $AB ; string to float eval exponent -ve flag
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Astrtl = numdpf ; array start pointer low byte
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Astrth = expneg ; array start pointer high byte
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| 223 |
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Histrl = numdpf ; highest string low byte
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| 224 |
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Histrh = expneg ; highest string high byte
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| 226 |
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Baslnl = numdpf ; BASIC search line pointer low byte
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| 227 |
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Baslnh = expneg ; BASIC search line pointer high byte
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| 228 |
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| 229 |
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Fvar_l = numdpf ; find/found variable pointer low byte
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| 230 |
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Fvar_h = expneg ; find/found variable pointer high byte
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| 231 |
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| 232 |
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Ostrtl = numdpf ; old block start pointer low byte
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| 233 |
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Ostrth = expneg ; old block start pointer high byte
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Vrschl = numdpf ; variable search pointer low byte
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Vrschh = expneg ; variable search pointer high byte
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| 238 |
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FAC1_e = $AC ; FAC1 exponent
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| 239 |
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FAC1_1 = FAC1_e+1 ; FAC1 mantissa1
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| 240 |
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FAC1_2 = FAC1_e+2 ; FAC1 mantissa2
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| 241 |
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FAC1_3 = FAC1_e+3 ; FAC1 mantissa3
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| 242 |
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FAC1_s = FAC1_e+4 ; FAC1 sign (b7)
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| 243 |
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| 244 |
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str_ln = FAC1_e ; string length
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| 245 |
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str_pl = FAC1_1 ; string pointer low byte
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| 246 |
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str_ph = FAC1_2 ; string pointer high byte
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| 247 |
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| 248 |
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des_pl = FAC1_2 ; string descriptor pointer low byte
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| 249 |
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des_ph = FAC1_3 ; string descriptor pointer high byte
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| 250 |
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| 251 |
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mids_l = FAC1_3 ; MID$ string temp length byte
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| 252 |
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| 253 |
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negnum = $B1 ; string to float eval -ve flag
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| 254 |
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numcon = $B1 ; series evaluation constant count
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| 255 |
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| 256 |
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FAC1_o = $B2 ; FAC1 overflow byte
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| 258 |
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FAC2_e = $B3 ; FAC2 exponent
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| 259 |
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FAC2_1 = FAC2_e+1 ; FAC2 mantissa1
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| 260 |
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FAC2_2 = FAC2_e+2 ; FAC2 mantissa2
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| 261 |
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FAC2_3 = FAC2_e+3 ; FAC2 mantissa3
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| 262 |
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FAC2_s = FAC2_e+4 ; FAC2 sign (b7)
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| 263 |
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| 264 |
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FAC_sc = $B8 ; FAC sign comparison, Acc#1 vs #2
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| 265 |
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FAC1_r = $B9 ; FAC1 rounding byte
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| 266 |
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| 267 |
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ssptr_l = FAC_sc ; string start pointer low byte
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| 268 |
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ssptr_h = FAC1_r ; string start pointer high byte
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| 269 |
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| 270 |
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sdescr = FAC_sc ; string descriptor pointer
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| 271 |
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| 272 |
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csidx = $BA ; line crunch save index
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| 273 |
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Asptl = csidx ; array size/pointer low byte
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| 274 |
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Aspth = $BB ; array size/pointer high byte
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| 275 |
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| 276 |
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Btmpl = Asptl ; BASIC pointer temp low byte
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| 277 |
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Btmph = Aspth ; BASIC pointer temp low byte
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| 278 |
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| 279 |
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Cptrl = Asptl ; BASIC pointer temp low byte
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| 280 |
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Cptrh = Aspth ; BASIC pointer temp low byte
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| 281 |
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| 282 |
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Sendl = Asptl ; BASIC pointer temp low byte
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| 283 |
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Sendh = Aspth ; BASIC pointer temp low byte
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| 284 |
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| 285 |
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LAB_IGBY = $BC ; get next BASIC byte subroutine
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| 286 |
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| 287 |
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LAB_GBYT = $C2 ; get current BASIC byte subroutine
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| 288 |
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Bpntrl = $C3 ; BASIC execute (get byte) pointer low byte
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| 289 |
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Bpntrh = Bpntrl+1 ; BASIC execute (get byte) pointer high byte
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| 290 |
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| 291 |
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; = $D7 ; end of get BASIC char subroutine
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| 292 |
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| 293 |
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Rbyte4 = $D8 ; extra PRNG byte
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| 294 |
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Rbyte1 = Rbyte4+1 ; most significant PRNG byte
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| 295 |
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Rbyte2 = Rbyte4+2 ; middle PRNG byte
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| 296 |
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Rbyte3 = Rbyte4+3 ; least significant PRNG byte
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| 297 |
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| 298 |
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NmiBase = $DC ; NMI handler enabled/setup/triggered flags
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| 299 |
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; bit function
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| 300 |
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; === ========
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| 301 |
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; 7 interrupt enabled
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| 302 |
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; 6 interrupt setup
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| 303 |
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; 5 interrupt happened
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| 304 |
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; = $DD ; NMI handler addr low byte
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| 305 |
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; = $DE ; NMI handler addr high byte
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| 306 |
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IrqBase = $DF ; IRQ handler enabled/setup/triggered flags
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| 307 |
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; = $E0 ; IRQ handler addr low byte
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| 308 |
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; = $E1 ; IRQ handler addr high byte
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| 309 |
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| 310 |
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; = $DE ; unused
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| 311 |
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; = $DF ; unused
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| 312 |
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; = $E0 ; unused
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| 313 |
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; = $E1 ; unused
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| 314 |
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; = $E2 ; unused
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| 315 |
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; = $E3 ; unused
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| 316 |
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; = $E4 ; unused
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| 317 |
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; = $E5 ; unused
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| 318 |
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; = $E6 ; unused
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| 319 |
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; = $E7 ; unused
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| 320 |
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; = $E8 ; unused
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| 321 |
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; = $E9 ; unused
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| 322 |
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; = $EA ; unused
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| 323 |
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; = $EB ; unused
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| 324 |
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|
; = $EC ; unused
|
| 325 |
|
|
; = $ED ; unused
|
| 326 |
|
|
; = $EE ; unused
|
| 327 |
|
|
|
| 328 |
|
|
Decss = $EF ; number to decimal string start
|
| 329 |
|
|
Decssp1 = Decss+1 ; number to decimal string start
|
| 330 |
|
|
|
| 331 |
|
|
; = $FF ; decimal string end
|
| 332 |
|
|
|
| 333 |
|
|
; token values needed for BASIC
|
| 334 |
|
|
|
| 335 |
|
|
; primary command tokens (can start a statement)
|
| 336 |
|
|
|
| 337 |
|
|
TK_END = $80 ; END token
|
| 338 |
|
|
TK_FOR = TK_END+1 ; FOR token
|
| 339 |
|
|
TK_NEXT = TK_FOR+1 ; NEXT token
|
| 340 |
|
|
TK_DATA = TK_NEXT+1 ; DATA token
|
| 341 |
|
|
TK_INPUT = TK_DATA+1 ; INPUT token
|
| 342 |
|
|
TK_DIM = TK_INPUT+1 ; DIM token
|
| 343 |
|
|
TK_READ = TK_DIM+1 ; READ token
|
| 344 |
|
|
TK_LET = TK_READ+1 ; LET token
|
| 345 |
|
|
TK_DEC = TK_LET+1 ; DEC token
|
| 346 |
|
|
TK_GOTO = TK_DEC+1 ; GOTO token
|
| 347 |
|
|
TK_RUN = TK_GOTO+1 ; RUN token
|
| 348 |
|
|
TK_IF = TK_RUN+1 ; IF token
|
| 349 |
|
|
TK_RESTORE = TK_IF+1 ; RESTORE token
|
| 350 |
|
|
TK_GOSUB = TK_RESTORE+1 ; GOSUB token
|
| 351 |
|
|
TK_RETIRQ = TK_GOSUB+1 ; RETIRQ token
|
| 352 |
|
|
TK_RETNMI = TK_RETIRQ+1 ; RETNMI token
|
| 353 |
|
|
TK_RETURN = TK_RETNMI+1 ; RETURN token
|
| 354 |
|
|
TK_REM = TK_RETURN+1 ; REM token
|
| 355 |
|
|
TK_STOP = TK_REM+1 ; STOP token
|
| 356 |
|
|
TK_ON = TK_STOP+1 ; ON token
|
| 357 |
|
|
TK_NULL = TK_ON+1 ; NULL token
|
| 358 |
|
|
TK_INC = TK_NULL+1 ; INC token
|
| 359 |
|
|
TK_WAIT = TK_INC+1 ; WAIT token
|
| 360 |
|
|
TK_LOAD = TK_WAIT+1 ; LOAD token
|
| 361 |
|
|
TK_SAVE = TK_LOAD+1 ; SAVE token
|
| 362 |
|
|
TK_DEF = TK_SAVE+1 ; DEF token
|
| 363 |
|
|
TK_POKE = TK_DEF+1 ; POKE token
|
| 364 |
|
|
TK_DOKE = TK_POKE+1 ; DOKE token
|
| 365 |
|
|
TK_CALL = TK_DOKE+1 ; CALL token
|
| 366 |
|
|
TK_DO = TK_CALL+1 ; DO token
|
| 367 |
|
|
TK_LOOP = TK_DO+1 ; LOOP token
|
| 368 |
|
|
TK_PRINT = TK_LOOP+1 ; PRINT token
|
| 369 |
|
|
TK_CONT = TK_PRINT+1 ; CONT token
|
| 370 |
|
|
TK_LIST = TK_CONT+1 ; LIST token
|
| 371 |
|
|
TK_CLEAR = TK_LIST+1 ; CLEAR token
|
| 372 |
|
|
TK_NEW = TK_CLEAR+1 ; NEW token
|
| 373 |
|
|
TK_WIDTH = TK_NEW+1 ; WIDTH token
|
| 374 |
|
|
TK_GET = TK_WIDTH+1 ; GET token
|
| 375 |
|
|
TK_SWAP = TK_GET+1 ; SWAP token
|
| 376 |
|
|
TK_BITSET = TK_SWAP+1 ; BITSET token
|
| 377 |
|
|
TK_BITCLR = TK_BITSET+1 ; BITCLR token
|
| 378 |
|
|
TK_IRQ = TK_BITCLR+1 ; IRQ token
|
| 379 |
|
|
TK_NMI = TK_IRQ+1 ; NMI token
|
| 380 |
|
|
TK_BYE = TK_NMI+1
|
| 381 |
|
|
|
| 382 |
|
|
; secondary command tokens, can't start a statement
|
| 383 |
|
|
|
| 384 |
|
|
TK_TAB = TK_BYE+1 ; TAB token
|
| 385 |
|
|
TK_ELSE = TK_TAB+1 ; ELSE token
|
| 386 |
|
|
TK_TO = TK_ELSE+1 ; TO token
|
| 387 |
|
|
TK_FN = TK_TO+1 ; FN token
|
| 388 |
|
|
TK_SPC = TK_FN+1 ; SPC token
|
| 389 |
|
|
TK_THEN = TK_SPC+1 ; THEN token
|
| 390 |
|
|
TK_NOT = TK_THEN+1 ; NOT token
|
| 391 |
|
|
TK_STEP = TK_NOT+1 ; STEP token
|
| 392 |
|
|
TK_UNTIL = TK_STEP+1 ; UNTIL token
|
| 393 |
|
|
TK_WHILE = TK_UNTIL+1 ; WHILE token
|
| 394 |
|
|
TK_OFF = TK_WHILE+1 ; OFF token
|
| 395 |
|
|
|
| 396 |
|
|
; opperator tokens
|
| 397 |
|
|
|
| 398 |
|
|
TK_PLUS = TK_OFF+1 ; + token
|
| 399 |
|
|
TK_MINUS = TK_PLUS+1 ; - token
|
| 400 |
|
|
TK_MUL = TK_MINUS+1 ; * token
|
| 401 |
|
|
TK_DIV = TK_MUL+1 ; / token
|
| 402 |
|
|
TK_POWER = TK_DIV+1 ; ^ token
|
| 403 |
|
|
TK_AND = TK_POWER+1 ; AND token
|
| 404 |
|
|
TK_EOR = TK_AND+1 ; EOR token
|
| 405 |
|
|
TK_OR = TK_EOR+1 ; OR token
|
| 406 |
|
|
TK_RSHIFT = TK_OR+1 ; RSHIFT token
|
| 407 |
|
|
TK_LSHIFT = TK_RSHIFT+1 ; LSHIFT token
|
| 408 |
|
|
TK_GT = TK_LSHIFT+1 ; > token
|
| 409 |
|
|
TK_EQUAL = TK_GT+1 ; = token
|
| 410 |
|
|
TK_LT = TK_EQUAL+1 ; < token
|
| 411 |
|
|
|
| 412 |
|
|
; functions tokens
|
| 413 |
|
|
|
| 414 |
|
|
TK_SGN = TK_LT+1 ; SGN token
|
| 415 |
|
|
TK_INT = TK_SGN+1 ; INT token
|
| 416 |
|
|
TK_ABS = TK_INT+1 ; ABS token
|
| 417 |
|
|
TK_USR = TK_ABS+1 ; USR token
|
| 418 |
|
|
TK_FRE = TK_USR+1 ; FRE token
|
| 419 |
|
|
TK_POS = TK_FRE+1 ; POS token
|
| 420 |
|
|
TK_SQR = TK_POS+1 ; SQR token
|
| 421 |
|
|
TK_RND = TK_SQR+1 ; RND token
|
| 422 |
|
|
TK_LOG = TK_RND+1 ; LOG token
|
| 423 |
|
|
TK_EXP = TK_LOG+1 ; EXP token
|
| 424 |
|
|
TK_COS = TK_EXP+1 ; COS token
|
| 425 |
|
|
TK_SIN = TK_COS+1 ; SIN token
|
| 426 |
|
|
TK_TAN = TK_SIN+1 ; TAN token
|
| 427 |
|
|
TK_ATN = TK_TAN+1 ; ATN token
|
| 428 |
|
|
TK_PEEK = TK_ATN+1 ; PEEK token
|
| 429 |
|
|
TK_DEEK = TK_PEEK+1 ; DEEK token
|
| 430 |
|
|
TK_SADD = TK_DEEK+1 ; SADD token
|
| 431 |
|
|
TK_LEN = TK_SADD+1 ; LEN token
|
| 432 |
|
|
TK_STRS = TK_LEN+1 ; STR$ token
|
| 433 |
|
|
TK_VAL = TK_STRS+1 ; VAL token
|
| 434 |
|
|
TK_ASC = TK_VAL+1 ; ASC token
|
| 435 |
|
|
TK_UCASES = TK_ASC+1 ; UCASE$ token
|
| 436 |
|
|
TK_LCASES = TK_UCASES+1 ; LCASE$ token
|
| 437 |
|
|
TK_CHRS = TK_LCASES+1 ; CHR$ token
|
| 438 |
|
|
TK_HEXS = TK_CHRS+1 ; HEX$ token
|
| 439 |
|
|
TK_BINS = TK_HEXS+1 ; BIN$ token
|
| 440 |
|
|
TK_BITTST = TK_BINS+1 ; BITTST token
|
| 441 |
|
|
TK_MAX = TK_BITTST+1 ; MAX token
|
| 442 |
|
|
TK_MIN = TK_MAX+1 ; MIN token
|
| 443 |
|
|
TK_PI = TK_MIN+1 ; PI token
|
| 444 |
|
|
TK_TWOPI = TK_PI+1 ; TWOPI token
|
| 445 |
|
|
TK_VPTR = TK_TWOPI+1 ; VARPTR token
|
| 446 |
|
|
TK_LEFTS = TK_VPTR+1 ; LEFT$ token
|
| 447 |
|
|
TK_RIGHTS = TK_LEFTS+1 ; RIGHT$ token
|
| 448 |
|
|
TK_MIDS = TK_RIGHTS+1 ; MID$ token
|
| 449 |
|
|
|
| 450 |
|
|
; offsets from a base of X or Y
|
| 451 |
|
|
|
| 452 |
|
|
PLUS_0 = $00 ; X or Y plus 0
|
| 453 |
|
|
PLUS_1 = $01 ; X or Y plus 1
|
| 454 |
|
|
PLUS_2 = $02 ; X or Y plus 2
|
| 455 |
|
|
PLUS_3 = $03 ; X or Y plus 3
|
| 456 |
|
|
|
| 457 |
|
|
LAB_STAK = $0100 ; stack bottom, no offset
|
| 458 |
|
|
|
| 459 |
|
|
LAB_SKFE = LAB_STAK+$FE
|
| 460 |
|
|
; flushed stack address
|
| 461 |
|
|
LAB_SKFF = LAB_STAK+$FF
|
| 462 |
|
|
; flushed stack address
|
| 463 |
|
|
|
| 464 |
|
|
ccflag = $0200 ; BASIC CTRL-C flag, 00 = enabled, 01 = dis
|
| 465 |
|
|
ccbyte = ccflag+1 ; BASIC CTRL-C byte
|
| 466 |
|
|
ccnull = ccbyte+1 ; BASIC CTRL-C byte timeout
|
| 467 |
|
|
|
| 468 |
|
|
VEC_CC = ccnull+1 ; ctrl c check vector
|
| 469 |
|
|
|
| 470 |
|
|
VEC_IN = VEC_CC+2 ; input vector
|
| 471 |
|
|
VEC_OUT = VEC_IN+2 ; output vector
|
| 472 |
|
|
VEC_LD = VEC_OUT+2 ; load vector
|
| 473 |
|
|
VEC_SV = VEC_LD+2 ; save vector
|
| 474 |
|
|
|
| 475 |
|
|
; Ibuffs can now be anywhere in RAM, ensure that the max length is < $80
|
| 476 |
|
|
|
| 477 |
|
|
;Ibuffs = IRQ_vec+$14
|
| 478 |
|
|
Ibuffs = VEC_SV+$14
|
| 479 |
|
|
; start of input buffer after IRQ/NMI code
|
| 480 |
|
|
Ibuffe = Ibuffs+$47; end of input buffer
|
| 481 |
|
|
|
| 482 |
|
|
Ram_base = $0400 ; start of user RAM (set as needed, should be page aligned)
|
| 483 |
|
|
Ram_top = $1800 ; end of user RAM+1 (set as needed, should be page aligned)
|
| 484 |
|
|
|
| 485 |
|
|
include "supermon816.asm"
|
| 486 |
|
|
|
| 487 |
|
|
; This start can be changed to suit your system
|
| 488 |
|
|
|
| 489 |
|
|
; *= $C000
|
| 490 |
|
|
cpu W65C02
|
| 491 |
|
|
org $C000
|
| 492 |
|
|
|
| 493 |
|
|
; BASIC cold start entry point
|
| 494 |
|
|
|
| 495 |
|
|
; new page 2 initialisation, copy block to ccflag on
|
| 496 |
|
|
message "LAB_COLD"
|
| 497 |
|
|
LAB_COLD
|
| 498 |
|
|
LDY #PG2_TABE-PG2_TABS-1
|
| 499 |
|
|
; byte count-1
|
| 500 |
|
|
LAB_2D13
|
| 501 |
|
|
LDA PG2_TABS,Y ; get byte
|
| 502 |
|
|
STA ccflag,Y ; store in page 2
|
| 503 |
|
|
DEY ; decrement count
|
| 504 |
|
|
BPL LAB_2D13 ; loop if not done
|
| 505 |
|
|
LDX #$FF ; set byte
|
| 506 |
|
|
STX Ibuffs-1 ; *** Added by Daryl Rictor for SBC-2 compatibility
|
| 507 |
|
|
STX Clineh ; set current line high byte (set immediate mode)
|
| 508 |
|
|
TXS ; reset stack pointer
|
| 509 |
|
|
|
| 510 |
|
|
LDA #$4C ; code for JMP
|
| 511 |
|
|
STA Fnxjmp ; save for jump vector for functions
|
| 512 |
|
|
|
| 513 |
|
|
; copy block from LAB_2CEE to $00BC - $00D3
|
| 514 |
|
|
|
| 515 |
|
|
LDX #StrTab-LAB_2CEE ; set byte count
|
| 516 |
|
|
LAB_2D4E
|
| 517 |
|
|
LDA LAB_2CEE-1,X ; get byte from table
|
| 518 |
|
|
STA LAB_IGBY-1,X ; save byte in page zero
|
| 519 |
|
|
DEX ; decrement count
|
| 520 |
|
|
BNE LAB_2D4E ; loop if not all done
|
| 521 |
|
|
|
| 522 |
|
|
; copy block from StrTab to $0000 - $0012
|
| 523 |
|
|
|
| 524 |
|
|
LAB_GMEM
|
| 525 |
|
|
LDX #EndTab-StrTab-1 ; set byte count-1
|
| 526 |
|
|
TabLoop
|
| 527 |
|
|
LDA StrTab,X ; get byte from table
|
| 528 |
|
|
STA PLUS_0,X ; save byte in page zero
|
| 529 |
|
|
DEX ; decrement count
|
| 530 |
|
|
BPL TabLoop ; loop if not all done
|
| 531 |
|
|
|
| 532 |
|
|
; set-up start values
|
| 533 |
|
|
|
| 534 |
|
|
LDA #$00 ; clear A
|
| 535 |
|
|
STA NmiBase ; clear NMI handler enabled flag
|
| 536 |
|
|
STA IrqBase ; clear IRQ handler enabled flag
|
| 537 |
|
|
STA FAC1_o ; clear FAC1 overflow byte
|
| 538 |
|
|
STA last_sh ; clear descriptor stack top item pointer high byte
|
| 539 |
|
|
|
| 540 |
|
|
LDA #$0E ; set default tab size
|
| 541 |
|
|
STA TabSiz ; save it
|
| 542 |
|
|
LDA #$03 ; set garbage collect step size for descriptor stack
|
| 543 |
|
|
STA g_step ; save it
|
| 544 |
|
|
LDX #des_sk ; descriptor stack start
|
| 545 |
|
|
STX next_s ; set descriptor stack pointer
|
| 546 |
|
|
|
| 547 |
|
|
JSR LAB_CRLF ; print CR/LF
|
| 548 |
|
|
LDA #
|
| 549 |
|
|
LDY #>LAB_MSZM ; point to memory size message (high addr)
|
| 550 |
|
|
JSR LAB_18C3 ; print null terminated string from memory
|
| 551 |
|
|
JSR LAB_INLN ; print "? " and get BASIC input
|
| 552 |
|
|
STX Bpntrl ; set BASIC execute pointer low byte
|
| 553 |
|
|
STY Bpntrh ; set BASIC execute pointer high byte
|
| 554 |
|
|
JSR LAB_GBYT ; get last byte back
|
| 555 |
|
|
|
| 556 |
|
|
BNE LAB_2DAA ; branch if not null (user typed something)
|
| 557 |
|
|
|
| 558 |
|
|
LDY #$00 ; else clear Y
|
| 559 |
|
|
; character was null so get memory size the hard way
|
| 560 |
|
|
; we get here with Y=0 and Itempl/h = Ram_base
|
| 561 |
|
|
LAB_2D93
|
| 562 |
|
|
INC Itempl ; increment temporary integer low byte
|
| 563 |
|
|
BNE LAB_2D99 ; branch if no overflow
|
| 564 |
|
|
|
| 565 |
|
|
INC Itemph ; increment temporary integer high byte
|
| 566 |
|
|
LDA Itemph ; get high byte
|
| 567 |
|
|
CMP #>Ram_top ; compare with top of RAM+1
|
| 568 |
|
|
BEQ LAB_2DB6 ; branch if match (end of user RAM)
|
| 569 |
|
|
|
| 570 |
|
|
LAB_2D99
|
| 571 |
|
|
LDA #$55 ; set test byte
|
| 572 |
|
|
STA (Itempl),Y ; save via temporary integer
|
| 573 |
|
|
CMP (Itempl),Y ; compare via temporary integer
|
| 574 |
|
|
BNE LAB_2DB6 ; branch if fail
|
| 575 |
|
|
|
| 576 |
|
|
ASL ; shift test byte left (now $AA)
|
| 577 |
|
|
STA (Itempl),Y ; save via temporary integer
|
| 578 |
|
|
CMP (Itempl),Y ; compare via temporary integer
|
| 579 |
|
|
BEQ LAB_2D93 ; if ok go do next byte
|
| 580 |
|
|
|
| 581 |
|
|
BNE LAB_2DB6 ; branch if fail
|
| 582 |
|
|
|
| 583 |
|
|
LAB_2DAA
|
| 584 |
|
|
JSR LAB_2887 ; get FAC1 from string
|
| 585 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 586 |
|
|
CMP #$98 ; compare with exponent = 2^24
|
| 587 |
|
|
BCS LAB_GMEM ; if too large go try again
|
| 588 |
|
|
|
| 589 |
|
|
JSR LAB_F2FU ; save integer part of FAC1 in temporary integer
|
| 590 |
|
|
; (no range check)
|
| 591 |
|
|
|
| 592 |
|
|
LAB_2DB6
|
| 593 |
|
|
LDA Itempl ; get temporary integer low byte
|
| 594 |
|
|
LDY Itemph ; get temporary integer high byte
|
| 595 |
|
|
CPY #
|
| 596 |
|
|
BCC LAB_GMEM ; if too small go try again
|
| 597 |
|
|
|
| 598 |
|
|
|
| 599 |
|
|
; uncomment these lines if you want to check on the high limit of memory. Note if
|
| 600 |
|
|
; Ram_top is set too low then this will fail. default is ignore it and assume the
|
| 601 |
|
|
; users know what they're doing!
|
| 602 |
|
|
|
| 603 |
|
|
; CPY #>Ram_top ; compare with top of RAM high byte
|
| 604 |
|
|
; BCC MEM_OK ; branch if < RAM top
|
| 605 |
|
|
|
| 606 |
|
|
; BNE LAB_GMEM ; if too large go try again
|
| 607 |
|
|
; else was = so compare low bytes
|
| 608 |
|
|
; CMP #
|
| 609 |
|
|
; BEQ MEM_OK ; branch if = RAM top
|
| 610 |
|
|
|
| 611 |
|
|
; BCS LAB_GMEM ; if too large go try again
|
| 612 |
|
|
|
| 613 |
|
|
;MEM_OK
|
| 614 |
|
|
STA Ememl ; set end of mem low byte
|
| 615 |
|
|
STY Ememh ; set end of mem high byte
|
| 616 |
|
|
STA Sstorl ; set bottom of string space low byte
|
| 617 |
|
|
STY Sstorh ; set bottom of string space high byte
|
| 618 |
|
|
|
| 619 |
|
|
LDY #
|
| 620 |
|
|
LDX #>Ram_base ; set start addr high byte
|
| 621 |
|
|
STY Smeml ; save start of mem low byte
|
| 622 |
|
|
STX Smemh ; save start of mem high byte
|
| 623 |
|
|
|
| 624 |
|
|
; this line is only needed if Ram_base is not $xx00
|
| 625 |
|
|
|
| 626 |
|
|
; LDY #$00 ; clear Y
|
| 627 |
|
|
TYA ; clear A
|
| 628 |
|
|
STA (Smeml),Y ; clear first byte
|
| 629 |
|
|
INC Smeml ; increment start of mem low byte
|
| 630 |
|
|
|
| 631 |
|
|
; these two lines are only needed if Ram_base is $xxFF
|
| 632 |
|
|
|
| 633 |
|
|
; BNE LAB_2E05 ; branch if no rollover
|
| 634 |
|
|
|
| 635 |
|
|
; INC Smemh ; increment start of mem high byte
|
| 636 |
|
|
LAB_2E05
|
| 637 |
|
|
JSR LAB_CRLF ; print CR/LF
|
| 638 |
|
|
JSR LAB_1463 ; do "NEW" and "CLEAR"
|
| 639 |
|
|
LDA Ememl ; get end of mem low byte
|
| 640 |
|
|
SEC ; set carry for subtract
|
| 641 |
|
|
SBC Smeml ; subtract start of mem low byte
|
| 642 |
|
|
TAX ; copy to X
|
| 643 |
|
|
LDA Ememh ; get end of mem high byte
|
| 644 |
|
|
SBC Smemh ; subtract start of mem high byte
|
| 645 |
|
|
JSR LAB_295E ; print XA as unsigned integer (bytes free)
|
| 646 |
|
|
LDA #
|
| 647 |
|
|
LDY #>LAB_SMSG ; point to sign-on message (high addr)
|
| 648 |
|
|
JSR LAB_18C3 ; print null terminated string from memory
|
| 649 |
|
|
LDA #
|
| 650 |
|
|
LDY #>LAB_1274 ; warm start vector high byte
|
| 651 |
|
|
STA Wrmjpl ; save warm start vector low byte
|
| 652 |
|
|
STY Wrmjph ; save warm start vector high byte
|
| 653 |
|
|
JMP (Wrmjpl) ; go do warm start
|
| 654 |
|
|
|
| 655 |
|
|
; open up space in memory
|
| 656 |
|
|
; move (Ostrtl)-(Obendl) to new block ending at (Nbendl)
|
| 657 |
|
|
|
| 658 |
|
|
; Nbendl,Nbendh - new block end address (A/Y)
|
| 659 |
|
|
; Obendl,Obendh - old block end address
|
| 660 |
|
|
; Ostrtl,Ostrth - old block start address
|
| 661 |
|
|
|
| 662 |
|
|
; returns with ..
|
| 663 |
|
|
|
| 664 |
|
|
; Nbendl,Nbendh - new block start address (high byte - $100)
|
| 665 |
|
|
; Obendl,Obendh - old block start address (high byte - $100)
|
| 666 |
|
|
; Ostrtl,Ostrth - old block start address (unchanged)
|
| 667 |
|
|
|
| 668 |
|
|
LAB_11CF
|
| 669 |
|
|
JSR LAB_121F ; check available memory, "Out of memory" error if no room
|
| 670 |
|
|
; addr to check is in AY (low/high)
|
| 671 |
|
|
STA Earryl ; save new array mem end low byte
|
| 672 |
|
|
STY Earryh ; save new array mem end high byte
|
| 673 |
|
|
|
| 674 |
|
|
; open up space in memory
|
| 675 |
|
|
; move (Ostrtl)-(Obendl) to new block ending at (Nbendl)
|
| 676 |
|
|
; don't set array end
|
| 677 |
|
|
|
| 678 |
|
|
LAB_11D6
|
| 679 |
|
|
SEC ; set carry for subtract
|
| 680 |
|
|
LDA Obendl ; get block end low byte
|
| 681 |
|
|
SBC Ostrtl ; subtract block start low byte
|
| 682 |
|
|
TAY ; copy MOD(block length/$100) byte to Y
|
| 683 |
|
|
LDA Obendh ; get block end high byte
|
| 684 |
|
|
SBC Ostrth ; subtract block start high byte
|
| 685 |
|
|
TAX ; copy block length high byte to X
|
| 686 |
|
|
INX ; +1 to allow for count=0 exit
|
| 687 |
|
|
TYA ; copy block length low byte to A
|
| 688 |
|
|
BEQ LAB_120A ; branch if length low byte=0
|
| 689 |
|
|
|
| 690 |
|
|
; block is (X-1)*256+Y bytes, do the Y bytes first
|
| 691 |
|
|
|
| 692 |
|
|
SEC ; set carry for add + 1, two's complement
|
| 693 |
|
|
EOR #$FF ; invert low byte for subtract
|
| 694 |
|
|
ADC Obendl ; add block end low byte
|
| 695 |
|
|
|
| 696 |
|
|
STA Obendl ; save corrected old block end low byte
|
| 697 |
|
|
BCS LAB_11F3 ; branch if no underflow
|
| 698 |
|
|
|
| 699 |
|
|
DEC Obendh ; else decrement block end high byte
|
| 700 |
|
|
SEC ; set carry for add + 1, two's complement
|
| 701 |
|
|
LAB_11F3
|
| 702 |
|
|
TYA ; get MOD(block length/$100) byte
|
| 703 |
|
|
EOR #$FF ; invert low byte for subtract
|
| 704 |
|
|
ADC Nbendl ; add destination end low byte
|
| 705 |
|
|
STA Nbendl ; save modified new block end low byte
|
| 706 |
|
|
BCS LAB_1203 ; branch if no underflow
|
| 707 |
|
|
|
| 708 |
|
|
DEC Nbendh ; else decrement block end high byte
|
| 709 |
|
|
BCC LAB_1203 ; branch always
|
| 710 |
|
|
|
| 711 |
|
|
LAB_11FF
|
| 712 |
|
|
LDA (Obendl),Y ; get byte from source
|
| 713 |
|
|
STA (Nbendl),Y ; copy byte to destination
|
| 714 |
|
|
LAB_1203
|
| 715 |
|
|
DEY ; decrement index
|
| 716 |
|
|
BNE LAB_11FF ; loop until Y=0
|
| 717 |
|
|
|
| 718 |
|
|
; now do Y=0 indexed byte
|
| 719 |
|
|
LDA (Obendl),Y ; get byte from source
|
| 720 |
|
|
STA (Nbendl),Y ; save byte to destination
|
| 721 |
|
|
LAB_120A
|
| 722 |
|
|
DEC Obendh ; decrement source pointer high byte
|
| 723 |
|
|
DEC Nbendh ; decrement destination pointer high byte
|
| 724 |
|
|
DEX ; decrement block count
|
| 725 |
|
|
BNE LAB_1203 ; loop until count = $0
|
| 726 |
|
|
|
| 727 |
|
|
RTS
|
| 728 |
|
|
|
| 729 |
|
|
; check room on stack for A bytes
|
| 730 |
|
|
; stack too deep? do OM error
|
| 731 |
|
|
|
| 732 |
|
|
LAB_1212
|
| 733 |
|
|
STA TempB ; save result in temp byte
|
| 734 |
|
|
TSX ; copy stack
|
| 735 |
|
|
CPX TempB ; compare new "limit" with stack
|
| 736 |
|
|
BCC LAB_OMER ; if stack < limit do "Out of memory" error then warm start
|
| 737 |
|
|
|
| 738 |
|
|
RTS
|
| 739 |
|
|
|
| 740 |
|
|
; check available memory, "Out of memory" error if no room
|
| 741 |
|
|
; addr to check is in AY (low/high)
|
| 742 |
|
|
|
| 743 |
|
|
LAB_121F
|
| 744 |
|
|
CPY Sstorh ; compare bottom of string mem high byte
|
| 745 |
|
|
BCC LAB_124B ; if less then exit (is ok)
|
| 746 |
|
|
|
| 747 |
|
|
BNE LAB_1229 ; skip next test if greater (tested <)
|
| 748 |
|
|
|
| 749 |
|
|
; high byte was =, now do low byte
|
| 750 |
|
|
CMP Sstorl ; compare with bottom of string mem low byte
|
| 751 |
|
|
BCC LAB_124B ; if less then exit (is ok)
|
| 752 |
|
|
|
| 753 |
|
|
; addr is > string storage ptr (oops!)
|
| 754 |
|
|
LAB_1229
|
| 755 |
|
|
PHA ; push addr low byte
|
| 756 |
|
|
LDX #$08 ; set index to save Adatal to expneg inclusive
|
| 757 |
|
|
TYA ; copy addr high byte (to push on stack)
|
| 758 |
|
|
|
| 759 |
|
|
; save misc numeric work area
|
| 760 |
|
|
LAB_122D
|
| 761 |
|
|
PHA ; push byte
|
| 762 |
|
|
LDA Adatal-1,X ; get byte from Adatal to expneg ( ,$00 not pushed)
|
| 763 |
|
|
DEX ; decrement index
|
| 764 |
|
|
BPL LAB_122D ; loop until all done
|
| 765 |
|
|
|
| 766 |
|
|
JSR LAB_GARB ; garbage collection routine
|
| 767 |
|
|
|
| 768 |
|
|
; restore misc numeric work area
|
| 769 |
|
|
LDX #$00 ; clear the index to restore bytes
|
| 770 |
|
|
LAB_1238
|
| 771 |
|
|
PLA ; pop byte
|
| 772 |
|
|
STA Adatal,X ; save byte to Adatal to expneg
|
| 773 |
|
|
INX ; increment index
|
| 774 |
|
|
CPX #$08 ; compare with end + 1
|
| 775 |
|
|
BMI LAB_1238 ; loop if more to do
|
| 776 |
|
|
|
| 777 |
|
|
PLA ; pop addr high byte
|
| 778 |
|
|
TAY ; copy back to Y
|
| 779 |
|
|
PLA ; pop addr low byte
|
| 780 |
|
|
CPY Sstorh ; compare bottom of string mem high byte
|
| 781 |
|
|
BCC LAB_124B ; if less then exit (is ok)
|
| 782 |
|
|
|
| 783 |
|
|
BNE LAB_OMER ; if greater do "Out of memory" error then warm start
|
| 784 |
|
|
|
| 785 |
|
|
; high byte was =, now do low byte
|
| 786 |
|
|
CMP Sstorl ; compare with bottom of string mem low byte
|
| 787 |
|
|
BCS LAB_OMER ; if >= do "Out of memory" error then warm start
|
| 788 |
|
|
|
| 789 |
|
|
; ok exit, carry clear
|
| 790 |
|
|
LAB_124B
|
| 791 |
|
|
RTS
|
| 792 |
|
|
|
| 793 |
|
|
; do "Out of memory" error then warm start
|
| 794 |
|
|
|
| 795 |
|
|
LAB_OMER
|
| 796 |
|
|
LDX #$0C ; error code $0C ("Out of memory" error)
|
| 797 |
|
|
|
| 798 |
|
|
; do error #X, then warm start
|
| 799 |
|
|
|
| 800 |
|
|
LAB_XERR
|
| 801 |
|
|
JSR LAB_CRLF ; print CR/LF
|
| 802 |
|
|
|
| 803 |
|
|
LDA LAB_BAER,X ; get error message pointer low byte
|
| 804 |
|
|
LDY LAB_BAER+1,X ; get error message pointer high byte
|
| 805 |
|
|
JSR LAB_18C3 ; print null terminated string from memory
|
| 806 |
|
|
|
| 807 |
|
|
JSR LAB_1491 ; flush stack and clear continue flag
|
| 808 |
|
|
LDA #
|
| 809 |
|
|
LDY #>LAB_EMSG ; point to " Error" high addr
|
| 810 |
|
|
LAB_1269
|
| 811 |
|
|
JSR LAB_18C3 ; print null terminated string from memory
|
| 812 |
|
|
LDY Clineh ; get current line high byte
|
| 813 |
|
|
INY ; increment it
|
| 814 |
|
|
BEQ LAB_1274 ; go do warm start (was immediate mode)
|
| 815 |
|
|
|
| 816 |
|
|
; else print line number
|
| 817 |
|
|
JSR LAB_2953 ; print " in line [LINE #]"
|
| 818 |
|
|
|
| 819 |
|
|
; BASIC warm start entry point
|
| 820 |
|
|
; wait for Basic command
|
| 821 |
|
|
|
| 822 |
|
|
LAB_1274
|
| 823 |
|
|
; clear ON IRQ/NMI bytes
|
| 824 |
|
|
LDA #$00 ; clear A
|
| 825 |
|
|
STA IrqBase ; clear enabled byte
|
| 826 |
|
|
STA NmiBase ; clear enabled byte
|
| 827 |
|
|
LDA #
|
| 828 |
|
|
LDY #>LAB_RMSG ; point to "Ready" message high byte
|
| 829 |
|
|
|
| 830 |
|
|
JSR LAB_18C3 ; go do print string
|
| 831 |
|
|
|
| 832 |
|
|
; wait for Basic command (no "Ready")
|
| 833 |
|
|
|
| 834 |
|
|
LAB_127D
|
| 835 |
|
|
JSR LAB_1357 ; call for BASIC input
|
| 836 |
|
|
LAB_1280
|
| 837 |
|
|
STX Bpntrl ; set BASIC execute pointer low byte
|
| 838 |
|
|
STY Bpntrh ; set BASIC execute pointer high byte
|
| 839 |
|
|
JSR LAB_GBYT ; scan memory
|
| 840 |
|
|
BEQ LAB_127D ; loop while null
|
| 841 |
|
|
|
| 842 |
|
|
; got to interpret input line now ..
|
| 843 |
|
|
|
| 844 |
|
|
LDX #$FF ; current line to null value
|
| 845 |
|
|
STX Clineh ; set current line high byte
|
| 846 |
|
|
BCC LAB_1295 ; branch if numeric character (handle new BASIC line)
|
| 847 |
|
|
|
| 848 |
|
|
; no line number .. immediate mode
|
| 849 |
|
|
JSR LAB_13A6 ; crunch keywords into Basic tokens
|
| 850 |
|
|
JMP LAB_15F6 ; go scan and interpret code
|
| 851 |
|
|
|
| 852 |
|
|
; handle new BASIC line
|
| 853 |
|
|
|
| 854 |
|
|
LAB_1295
|
| 855 |
|
|
JSR LAB_GFPN ; get fixed-point number into temp integer
|
| 856 |
|
|
JSR LAB_13A6 ; crunch keywords into Basic tokens
|
| 857 |
|
|
STY Ibptr ; save index pointer to end of crunched line
|
| 858 |
|
|
JSR LAB_SSLN ; search BASIC for temp integer line number
|
| 859 |
|
|
BCC LAB_12E6 ; branch if not found
|
| 860 |
|
|
|
| 861 |
|
|
; aroooogah! line # already exists! delete it
|
| 862 |
|
|
LDY #$01 ; set index to next line pointer high byte
|
| 863 |
|
|
LDA (Baslnl),Y ; get next line pointer high byte
|
| 864 |
|
|
STA ut1_ph ; save it
|
| 865 |
|
|
LDA Svarl ; get start of vars low byte
|
| 866 |
|
|
STA ut1_pl ; save it
|
| 867 |
|
|
LDA Baslnh ; get found line pointer high byte
|
| 868 |
|
|
STA ut2_ph ; save it
|
| 869 |
|
|
LDA Baslnl ; get found line pointer low byte
|
| 870 |
|
|
DEY ; decrement index
|
| 871 |
|
|
SBC (Baslnl),Y ; subtract next line pointer low byte
|
| 872 |
|
|
CLC ; clear carry for add
|
| 873 |
|
|
ADC Svarl ; add start of vars low byte
|
| 874 |
|
|
STA Svarl ; save new start of vars low byte
|
| 875 |
|
|
STA ut2_pl ; save destination pointer low byte
|
| 876 |
|
|
LDA Svarh ; get start of vars high byte
|
| 877 |
|
|
ADC #$FF ; -1 + carry
|
| 878 |
|
|
STA Svarh ; save start of vars high byte
|
| 879 |
|
|
SBC Baslnh ; subtract found line pointer high byte
|
| 880 |
|
|
TAX ; copy to block count
|
| 881 |
|
|
SEC ; set carry for subtract
|
| 882 |
|
|
LDA Baslnl ; get found line pointer low byte
|
| 883 |
|
|
SBC Svarl ; subtract start of vars low byte
|
| 884 |
|
|
TAY ; copy to bytes in first block count
|
| 885 |
|
|
BCS LAB_12D0 ; branch if overflow
|
| 886 |
|
|
|
| 887 |
|
|
INX ; increment block count (correct for =0 loop exit)
|
| 888 |
|
|
DEC ut2_ph ; decrement destination high byte
|
| 889 |
|
|
LAB_12D0
|
| 890 |
|
|
CLC ; clear carry for add
|
| 891 |
|
|
ADC ut1_pl ; add source pointer low byte
|
| 892 |
|
|
BCC LAB_12D8 ; branch if no overflow
|
| 893 |
|
|
|
| 894 |
|
|
DEC ut1_ph ; else decrement source pointer high byte
|
| 895 |
|
|
CLC ; clear carry
|
| 896 |
|
|
|
| 897 |
|
|
; close up memory to delete old line
|
| 898 |
|
|
LAB_12D8
|
| 899 |
|
|
LDA (ut1_pl),Y ; get byte from source
|
| 900 |
|
|
STA (ut2_pl),Y ; copy to destination
|
| 901 |
|
|
INY ; increment index
|
| 902 |
|
|
BNE LAB_12D8 ; while <> 0 do this block
|
| 903 |
|
|
|
| 904 |
|
|
INC ut1_ph ; increment source pointer high byte
|
| 905 |
|
|
INC ut2_ph ; increment destination pointer high byte
|
| 906 |
|
|
DEX ; decrement block count
|
| 907 |
|
|
BNE LAB_12D8 ; loop until all done
|
| 908 |
|
|
|
| 909 |
|
|
; got new line in buffer and no existing same #
|
| 910 |
|
|
LAB_12E6
|
| 911 |
|
|
LDA Ibuffs ; get byte from start of input buffer
|
| 912 |
|
|
BEQ LAB_1319 ; if null line just go flush stack/vars and exit
|
| 913 |
|
|
|
| 914 |
|
|
; got new line and it isn't empty line
|
| 915 |
|
|
LDA Ememl ; get end of mem low byte
|
| 916 |
|
|
LDY Ememh ; get end of mem high byte
|
| 917 |
|
|
STA Sstorl ; set bottom of string space low byte
|
| 918 |
|
|
STY Sstorh ; set bottom of string space high byte
|
| 919 |
|
|
LDA Svarl ; get start of vars low byte (end of BASIC)
|
| 920 |
|
|
STA Obendl ; save old block end low byte
|
| 921 |
|
|
LDY Svarh ; get start of vars high byte (end of BASIC)
|
| 922 |
|
|
STY Obendh ; save old block end high byte
|
| 923 |
|
|
ADC Ibptr ; add input buffer pointer (also buffer length)
|
| 924 |
|
|
BCC LAB_1301 ; branch if no overflow from add
|
| 925 |
|
|
|
| 926 |
|
|
INY ; else increment high byte
|
| 927 |
|
|
LAB_1301
|
| 928 |
|
|
STA Nbendl ; save new block end low byte (move to, low byte)
|
| 929 |
|
|
STY Nbendh ; save new block end high byte
|
| 930 |
|
|
JSR LAB_11CF ; open up space in memory
|
| 931 |
|
|
; old start pointer Ostrtl,Ostrth set by the find line call
|
| 932 |
|
|
LDA Earryl ; get array mem end low byte
|
| 933 |
|
|
LDY Earryh ; get array mem end high byte
|
| 934 |
|
|
STA Svarl ; save start of vars low byte
|
| 935 |
|
|
STY Svarh ; save start of vars high byte
|
| 936 |
|
|
LDY Ibptr ; get input buffer pointer (also buffer length)
|
| 937 |
|
|
DEY ; adjust for loop type
|
| 938 |
|
|
LAB_1311
|
| 939 |
|
|
LDA Ibuffs-4,Y ; get byte from crunched line
|
| 940 |
|
|
STA (Baslnl),Y ; save it to program memory
|
| 941 |
|
|
DEY ; decrement count
|
| 942 |
|
|
CPY #$03 ; compare with first byte-1
|
| 943 |
|
|
BNE LAB_1311 ; continue while count <> 3
|
| 944 |
|
|
|
| 945 |
|
|
LDA Itemph ; get line # high byte
|
| 946 |
|
|
STA (Baslnl),Y ; save it to program memory
|
| 947 |
|
|
DEY ; decrement count
|
| 948 |
|
|
LDA Itempl ; get line # low byte
|
| 949 |
|
|
STA (Baslnl),Y ; save it to program memory
|
| 950 |
|
|
DEY ; decrement count
|
| 951 |
|
|
LDA #$FF ; set byte to allow chain rebuild. if you didn't set this
|
| 952 |
|
|
; byte then a zero already here would stop the chain rebuild
|
| 953 |
|
|
; as it would think it was the [EOT] marker.
|
| 954 |
|
|
STA (Baslnl),Y ; save it to program memory
|
| 955 |
|
|
|
| 956 |
|
|
LAB_1319
|
| 957 |
|
|
JSR LAB_1477 ; reset execution to start, clear vars and flush stack
|
| 958 |
|
|
LDX Smeml ; get start of mem low byte
|
| 959 |
|
|
LDA Smemh ; get start of mem high byte
|
| 960 |
|
|
LDY #$01 ; index to high byte of next line pointer
|
| 961 |
|
|
LAB_1325
|
| 962 |
|
|
STX ut1_pl ; set line start pointer low byte
|
| 963 |
|
|
STA ut1_ph ; set line start pointer high byte
|
| 964 |
|
|
LDA (ut1_pl),Y ; get it
|
| 965 |
|
|
BEQ LAB_133E ; exit if end of program
|
| 966 |
|
|
|
| 967 |
|
|
; rebuild chaining of Basic lines
|
| 968 |
|
|
|
| 969 |
|
|
LDY #$04 ; point to first code byte of line
|
| 970 |
|
|
; there is always 1 byte + [EOL] as null entries are deleted
|
| 971 |
|
|
LAB_1330
|
| 972 |
|
|
INY ; next code byte
|
| 973 |
|
|
LDA (ut1_pl),Y ; get byte
|
| 974 |
|
|
BNE LAB_1330 ; loop if not [EOL]
|
| 975 |
|
|
|
| 976 |
|
|
SEC ; set carry for add + 1
|
| 977 |
|
|
TYA ; copy end index
|
| 978 |
|
|
ADC ut1_pl ; add to line start pointer low byte
|
| 979 |
|
|
TAX ; copy to X
|
| 980 |
|
|
LDY #$00 ; clear index, point to this line's next line pointer
|
| 981 |
|
|
STA (ut1_pl),Y ; set next line pointer low byte
|
| 982 |
|
|
TYA ; clear A
|
| 983 |
|
|
ADC ut1_ph ; add line start pointer high byte + carry
|
| 984 |
|
|
INY ; increment index to high byte
|
| 985 |
|
|
STA (ut1_pl),Y ; save next line pointer low byte
|
| 986 |
|
|
BCC LAB_1325 ; go do next line, branch always, carry clear
|
| 987 |
|
|
|
| 988 |
|
|
|
| 989 |
|
|
LAB_133E
|
| 990 |
|
|
JMP LAB_127D ; else we just wait for Basic command, no "Ready"
|
| 991 |
|
|
|
| 992 |
|
|
; print "? " and get BASIC input
|
| 993 |
|
|
|
| 994 |
|
|
LAB_INLN
|
| 995 |
|
|
JSR LAB_18E3 ; print "?" character
|
| 996 |
|
|
JSR LAB_18E0 ; print " "
|
| 997 |
|
|
BNE LAB_1357 ; call for BASIC input and return
|
| 998 |
|
|
|
| 999 |
|
|
; receive line from keyboard
|
| 1000 |
|
|
|
| 1001 |
|
|
; $08 as delete key (BACKSPACE on standard keyboard)
|
| 1002 |
|
|
LAB_134B
|
| 1003 |
|
|
JSR LAB_PRNA ; go print the character
|
| 1004 |
|
|
DEX ; decrement the buffer counter (delete)
|
| 1005 |
|
|
.byte $2C ; make LDX into BIT abs
|
| 1006 |
|
|
|
| 1007 |
|
|
; call for BASIC input (main entry point)
|
| 1008 |
|
|
|
| 1009 |
|
|
LAB_1357
|
| 1010 |
|
|
LDX #$00 ; clear BASIC line buffer pointer
|
| 1011 |
|
|
LAB_1359
|
| 1012 |
|
|
JSR V_INPT ; call scan input device
|
| 1013 |
|
|
BCC LAB_1359 ; loop if no byte
|
| 1014 |
|
|
|
| 1015 |
|
|
BEQ LAB_1359 ; loop until valid input (ignore NULLs)
|
| 1016 |
|
|
|
| 1017 |
|
|
CMP #$07 ; compare with [BELL]
|
| 1018 |
|
|
BEQ LAB_1378 ; branch if [BELL]
|
| 1019 |
|
|
|
| 1020 |
|
|
CMP #$0D ; compare with [CR]
|
| 1021 |
|
|
BEQ LAB_1384 ; do CR/LF exit if [CR]
|
| 1022 |
|
|
|
| 1023 |
|
|
CPX #$00 ; compare pointer with $00
|
| 1024 |
|
|
BNE LAB_1374 ; branch if not empty
|
| 1025 |
|
|
|
| 1026 |
|
|
; next two lines ignore any non print character and [SPACE] if input buffer empty
|
| 1027 |
|
|
|
| 1028 |
|
|
CMP #$21 ; compare with [SP]+1
|
| 1029 |
|
|
BCC LAB_1359 ; if < ignore character
|
| 1030 |
|
|
|
| 1031 |
|
|
LAB_1374
|
| 1032 |
|
|
CMP #$08 ; compare with [BACKSPACE] (delete last character)
|
| 1033 |
|
|
BEQ LAB_134B ; go delete last character
|
| 1034 |
|
|
|
| 1035 |
|
|
LAB_1378
|
| 1036 |
|
|
CPX #Ibuffe-Ibuffs ; compare character count with max
|
| 1037 |
|
|
BCS LAB_138E ; skip store and do [BELL] if buffer full
|
| 1038 |
|
|
|
| 1039 |
|
|
STA Ibuffs,X ; else store in buffer
|
| 1040 |
|
|
INX ; increment pointer
|
| 1041 |
|
|
LAB_137F
|
| 1042 |
|
|
JSR LAB_PRNA ; go print the character
|
| 1043 |
|
|
BNE LAB_1359 ; always loop for next character
|
| 1044 |
|
|
|
| 1045 |
|
|
LAB_1384
|
| 1046 |
|
|
JMP LAB_1866 ; do CR/LF exit to BASIC
|
| 1047 |
|
|
message "LAB_138E"
|
| 1048 |
|
|
; announce buffer full
|
| 1049 |
|
|
|
| 1050 |
|
|
LAB_138E
|
| 1051 |
|
|
LDA #$07 ; [BELL] character into A
|
| 1052 |
|
|
BNE LAB_137F ; go print the [BELL] but ignore input character
|
| 1053 |
|
|
; branch always
|
| 1054 |
|
|
|
| 1055 |
|
|
; crunch keywords into Basic tokens
|
| 1056 |
|
|
; position independent buffer version ..
|
| 1057 |
|
|
; faster, dictionary search version ....
|
| 1058 |
|
|
|
| 1059 |
|
|
LAB_13A6
|
| 1060 |
|
|
LDY #$FF ; set save index (makes for easy math later)
|
| 1061 |
|
|
|
| 1062 |
|
|
SEC ; set carry for subtract
|
| 1063 |
|
|
LDA Bpntrl ; get basic execute pointer low byte
|
| 1064 |
|
|
SBC #
|
| 1065 |
|
|
TAX ; copy result to X (index past line # if any)
|
| 1066 |
|
|
|
| 1067 |
|
|
STX Oquote ; clear open quote/DATA flag
|
| 1068 |
|
|
LAB_13AC
|
| 1069 |
|
|
LDA Ibuffs,X ; get byte from input buffer
|
| 1070 |
|
|
BEQ LAB_13EC ; if null save byte then exit
|
| 1071 |
|
|
|
| 1072 |
|
|
CMP #'_' ; compare with "_"
|
| 1073 |
|
|
BCS LAB_13EC ; if >= go save byte then continue crunching
|
| 1074 |
|
|
|
| 1075 |
|
|
CMP #'<' ; compare with "<"
|
| 1076 |
|
|
BCS LAB_13CC ; if >= go crunch now
|
| 1077 |
|
|
|
| 1078 |
|
|
CMP #'0' ; compare with "0"
|
| 1079 |
|
|
BCS LAB_13EC ; if >= go save byte then continue crunching
|
| 1080 |
|
|
|
| 1081 |
|
|
STA Scnquo ; save buffer byte as search character
|
| 1082 |
|
|
CMP #$22 ; is it quote character?
|
| 1083 |
|
|
BEQ LAB_1410 ; branch if so (copy quoted string)
|
| 1084 |
|
|
|
| 1085 |
|
|
CMP #'*' ; compare with "*"
|
| 1086 |
|
|
BCC LAB_13EC ; if < go save byte then continue crunching
|
| 1087 |
|
|
|
| 1088 |
|
|
; else crunch now
|
| 1089 |
|
|
LAB_13CC
|
| 1090 |
|
|
BIT Oquote ; get open quote/DATA token flag
|
| 1091 |
|
|
BVS LAB_13EC ; branch if b6 of Oquote set (was DATA)
|
| 1092 |
|
|
; go save byte then continue crunching
|
| 1093 |
|
|
|
| 1094 |
|
|
STX TempB ; save buffer read index
|
| 1095 |
|
|
STY csidx ; copy buffer save index
|
| 1096 |
|
|
LDY #
|
| 1097 |
|
|
STY ut2_pl ; save pointer low byte
|
| 1098 |
|
|
LDY #>TAB_1STC ; get keyword first character table high address
|
| 1099 |
|
|
STY ut2_ph ; save pointer high byte
|
| 1100 |
|
|
LDY #$00 ; clear table pointer
|
| 1101 |
|
|
|
| 1102 |
|
|
LAB_13D0
|
| 1103 |
|
|
CMP (ut2_pl),Y ; compare with keyword first character table byte
|
| 1104 |
|
|
BEQ LAB_13D1 ; go do word_table_chr if match
|
| 1105 |
|
|
|
| 1106 |
|
|
BCC LAB_13EA ; if < keyword first character table byte go restore
|
| 1107 |
|
|
; Y and save to crunched
|
| 1108 |
|
|
|
| 1109 |
|
|
INY ; else increment pointer
|
| 1110 |
|
|
BNE LAB_13D0 ; and loop (branch always)
|
| 1111 |
|
|
|
| 1112 |
|
|
; have matched first character of some keyword
|
| 1113 |
|
|
|
| 1114 |
|
|
LAB_13D1
|
| 1115 |
|
|
TYA ; copy matching index
|
| 1116 |
|
|
ASL ; *2 (bytes per pointer)
|
| 1117 |
|
|
TAX ; copy to new index
|
| 1118 |
|
|
LDA TAB_CHRT,X ; get keyword table pointer low byte
|
| 1119 |
|
|
STA ut2_pl ; save pointer low byte
|
| 1120 |
|
|
LDA TAB_CHRT+1,X ; get keyword table pointer high byte
|
| 1121 |
|
|
STA ut2_ph ; save pointer high byte
|
| 1122 |
|
|
|
| 1123 |
|
|
LDY #$FF ; clear table pointer (make -1 for start)
|
| 1124 |
|
|
|
| 1125 |
|
|
LDX TempB ; restore buffer read index
|
| 1126 |
|
|
|
| 1127 |
|
|
LAB_13D6
|
| 1128 |
|
|
INY ; next table byte
|
| 1129 |
|
|
LDA (ut2_pl),Y ; get byte from table
|
| 1130 |
|
|
LAB_13D8
|
| 1131 |
|
|
BMI LAB_13EA ; all bytes matched so go save token
|
| 1132 |
|
|
|
| 1133 |
|
|
INX ; next buffer byte
|
| 1134 |
|
|
CMP Ibuffs,X ; compare with byte from input buffer
|
| 1135 |
|
|
BEQ LAB_13D6 ; go compare next if match
|
| 1136 |
|
|
|
| 1137 |
|
|
BNE LAB_1417 ; branch if >< (not found keyword)
|
| 1138 |
|
|
|
| 1139 |
|
|
LAB_13EA
|
| 1140 |
|
|
LDY csidx ; restore save index
|
| 1141 |
|
|
|
| 1142 |
|
|
; save crunched to output
|
| 1143 |
|
|
LAB_13EC
|
| 1144 |
|
|
INX ; increment buffer index (to next input byte)
|
| 1145 |
|
|
INY ; increment save index (to next output byte)
|
| 1146 |
|
|
STA Ibuffs,Y ; save byte to output
|
| 1147 |
|
|
CMP #$00 ; set the flags, set carry
|
| 1148 |
|
|
BEQ LAB_142A ; do exit if was null [EOL]
|
| 1149 |
|
|
|
| 1150 |
|
|
; A holds token or byte here
|
| 1151 |
|
|
SBC #':' ; subtract ":" (carry set by CMP #00)
|
| 1152 |
|
|
BEQ LAB_13FF ; branch if it was ":" (is now $00)
|
| 1153 |
|
|
|
| 1154 |
|
|
; A now holds token-$3A
|
| 1155 |
|
|
CMP #TK_DATA-$3A ; compare with DATA token - $3A
|
| 1156 |
|
|
BNE LAB_1401 ; branch if not DATA
|
| 1157 |
|
|
|
| 1158 |
|
|
; token was : or DATA
|
| 1159 |
|
|
LAB_13FF
|
| 1160 |
|
|
STA Oquote ; save token-$3A (clear for ":", TK_DATA-$3A for DATA)
|
| 1161 |
|
|
LAB_1401
|
| 1162 |
|
|
EOR #TK_REM-$3A ; effectively subtract REM token offset
|
| 1163 |
|
|
BNE LAB_13AC ; If wasn't REM then go crunch rest of line
|
| 1164 |
|
|
|
| 1165 |
|
|
STA Asrch ; else was REM so set search for [EOL]
|
| 1166 |
|
|
|
| 1167 |
|
|
; loop for REM, "..." etc.
|
| 1168 |
|
|
LAB_1408
|
| 1169 |
|
|
LDA Ibuffs,X ; get byte from input buffer
|
| 1170 |
|
|
BEQ LAB_13EC ; branch if null [EOL]
|
| 1171 |
|
|
|
| 1172 |
|
|
CMP Asrch ; compare with stored character
|
| 1173 |
|
|
BEQ LAB_13EC ; branch if match (end quote)
|
| 1174 |
|
|
|
| 1175 |
|
|
; entry for copy string in quotes, don't crunch
|
| 1176 |
|
|
LAB_1410
|
| 1177 |
|
|
INY ; increment buffer save index
|
| 1178 |
|
|
STA Ibuffs,Y ; save byte to output
|
| 1179 |
|
|
INX ; increment buffer read index
|
| 1180 |
|
|
BNE LAB_1408 ; loop while <> 0 (should never be 0!)
|
| 1181 |
|
|
|
| 1182 |
|
|
; not found keyword this go
|
| 1183 |
|
|
LAB_1417
|
| 1184 |
|
|
LDX TempB ; compare has failed, restore buffer index (start byte!)
|
| 1185 |
|
|
|
| 1186 |
|
|
; now find the end of this word in the table
|
| 1187 |
|
|
LAB_141B
|
| 1188 |
|
|
LDA (ut2_pl),Y ; get table byte
|
| 1189 |
|
|
PHP ; save status
|
| 1190 |
|
|
INY ; increment table index
|
| 1191 |
|
|
PLP ; restore byte status
|
| 1192 |
|
|
BPL LAB_141B ; if not end of keyword go do next
|
| 1193 |
|
|
|
| 1194 |
|
|
LDA (ut2_pl),Y ; get byte from keyword table
|
| 1195 |
|
|
BNE LAB_13D8 ; go test next word if not zero byte (end of table)
|
| 1196 |
|
|
|
| 1197 |
|
|
; reached end of table with no match
|
| 1198 |
|
|
LDA Ibuffs,X ; restore byte from input buffer
|
| 1199 |
|
|
BPL LAB_13EA ; branch always (all bytes in buffer are $00-$7F)
|
| 1200 |
|
|
; go save byte in output and continue crunching
|
| 1201 |
|
|
|
| 1202 |
|
|
; reached [EOL]
|
| 1203 |
|
|
LAB_142A
|
| 1204 |
|
|
INY ; increment pointer
|
| 1205 |
|
|
INY ; increment pointer (makes it next line pointer high byte)
|
| 1206 |
|
|
STA Ibuffs,Y ; save [EOL] (marks [EOT] in immediate mode)
|
| 1207 |
|
|
INY ; adjust for line copy
|
| 1208 |
|
|
INY ; adjust for line copy
|
| 1209 |
|
|
INY ; adjust for line copy
|
| 1210 |
|
|
DEC Bpntrl ; allow for increment (change if buffer starts at $xxFF)
|
| 1211 |
|
|
RTS
|
| 1212 |
|
|
|
| 1213 |
|
|
; search Basic for temp integer line number from start of mem
|
| 1214 |
|
|
|
| 1215 |
|
|
LAB_SSLN
|
| 1216 |
|
|
LDA Smeml ; get start of mem low byte
|
| 1217 |
|
|
LDX Smemh ; get start of mem high byte
|
| 1218 |
|
|
|
| 1219 |
|
|
; search Basic for temp integer line number from AX
|
| 1220 |
|
|
; returns carry set if found
|
| 1221 |
|
|
; returns Baslnl/Baslnh pointer to found or next higher (not found) line
|
| 1222 |
|
|
|
| 1223 |
|
|
; old 541 new 507
|
| 1224 |
|
|
|
| 1225 |
|
|
LAB_SHLN
|
| 1226 |
|
|
LDY #$01 ; set index
|
| 1227 |
|
|
STA Baslnl ; save low byte as current
|
| 1228 |
|
|
STX Baslnh ; save high byte as current
|
| 1229 |
|
|
LDA (Baslnl),Y ; get pointer high byte from addr
|
| 1230 |
|
|
BEQ LAB_145F ; pointer was zero so we're done, do 'not found' exit
|
| 1231 |
|
|
|
| 1232 |
|
|
LDY #$03 ; set index to line # high byte
|
| 1233 |
|
|
LDA (Baslnl),Y ; get line # high byte
|
| 1234 |
|
|
DEY ; decrement index (point to low byte)
|
| 1235 |
|
|
CMP Itemph ; compare with temporary integer high byte
|
| 1236 |
|
|
BNE LAB_1455 ; if <> skip low byte check
|
| 1237 |
|
|
|
| 1238 |
|
|
LDA (Baslnl),Y ; get line # low byte
|
| 1239 |
|
|
CMP Itempl ; compare with temporary integer low byte
|
| 1240 |
|
|
LAB_1455
|
| 1241 |
|
|
BCS LAB_145E ; else if temp < this line, exit (passed line#)
|
| 1242 |
|
|
|
| 1243 |
|
|
LAB_1456
|
| 1244 |
|
|
DEY ; decrement index to next line ptr high byte
|
| 1245 |
|
|
LDA (Baslnl),Y ; get next line pointer high byte
|
| 1246 |
|
|
TAX ; copy to X
|
| 1247 |
|
|
DEY ; decrement index to next line ptr low byte
|
| 1248 |
|
|
LDA (Baslnl),Y ; get next line pointer low byte
|
| 1249 |
|
|
BCC LAB_SHLN ; go search for line # in temp (Itempl/Itemph) from AX
|
| 1250 |
|
|
; (carry always clear)
|
| 1251 |
|
|
|
| 1252 |
|
|
LAB_145E
|
| 1253 |
|
|
BEQ LAB_1460 ; exit if temp = found line #, carry is set
|
| 1254 |
|
|
|
| 1255 |
|
|
LAB_145F
|
| 1256 |
|
|
CLC ; clear found flag
|
| 1257 |
|
|
LAB_1460
|
| 1258 |
|
|
RTS
|
| 1259 |
|
|
|
| 1260 |
|
|
; perform NEW
|
| 1261 |
|
|
|
| 1262 |
|
|
LAB_NEW
|
| 1263 |
|
|
BNE LAB_1460 ; exit if not end of statement (to do syntax error)
|
| 1264 |
|
|
|
| 1265 |
|
|
LAB_1463
|
| 1266 |
|
|
LDA #$00 ; clear A
|
| 1267 |
|
|
TAY ; clear Y
|
| 1268 |
|
|
STA (Smeml),Y ; clear first line, next line pointer, low byte
|
| 1269 |
|
|
INY ; increment index
|
| 1270 |
|
|
STA (Smeml),Y ; clear first line, next line pointer, high byte
|
| 1271 |
|
|
CLC ; clear carry
|
| 1272 |
|
|
LDA Smeml ; get start of mem low byte
|
| 1273 |
|
|
ADC #$02 ; calculate end of BASIC low byte
|
| 1274 |
|
|
STA Svarl ; save start of vars low byte
|
| 1275 |
|
|
LDA Smemh ; get start of mem high byte
|
| 1276 |
|
|
ADC #$00 ; add any carry
|
| 1277 |
|
|
STA Svarh ; save start of vars high byte
|
| 1278 |
|
|
|
| 1279 |
|
|
; reset execution to start, clear vars and flush stack
|
| 1280 |
|
|
|
| 1281 |
|
|
LAB_1477
|
| 1282 |
|
|
CLC ; clear carry
|
| 1283 |
|
|
LDA Smeml ; get start of mem low byte
|
| 1284 |
|
|
ADC #$FF ; -1
|
| 1285 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 1286 |
|
|
LDA Smemh ; get start of mem high byte
|
| 1287 |
|
|
ADC #$FF ; -1+carry
|
| 1288 |
|
|
STA Bpntrh ; save BASIC execute pointer high byte
|
| 1289 |
|
|
|
| 1290 |
|
|
; "CLEAR" command gets here
|
| 1291 |
|
|
|
| 1292 |
|
|
LAB_147A
|
| 1293 |
|
|
LDA Ememl ; get end of mem low byte
|
| 1294 |
|
|
LDY Ememh ; get end of mem high byte
|
| 1295 |
|
|
STA Sstorl ; set bottom of string space low byte
|
| 1296 |
|
|
STY Sstorh ; set bottom of string space high byte
|
| 1297 |
|
|
LDA Svarl ; get start of vars low byte
|
| 1298 |
|
|
LDY Svarh ; get start of vars high byte
|
| 1299 |
|
|
STA Sarryl ; save var mem end low byte
|
| 1300 |
|
|
STY Sarryh ; save var mem end high byte
|
| 1301 |
|
|
STA Earryl ; save array mem end low byte
|
| 1302 |
|
|
STY Earryh ; save array mem end high byte
|
| 1303 |
|
|
JSR LAB_161A ; perform RESTORE command
|
| 1304 |
|
|
|
| 1305 |
|
|
; flush stack and clear continue flag
|
| 1306 |
|
|
|
| 1307 |
|
|
LAB_1491
|
| 1308 |
|
|
LDX #des_sk ; set descriptor stack pointer
|
| 1309 |
|
|
STX next_s ; save descriptor stack pointer
|
| 1310 |
|
|
PLA ; pull return address low byte
|
| 1311 |
|
|
TAX ; copy return address low byte
|
| 1312 |
|
|
PLA ; pull return address high byte
|
| 1313 |
|
|
STX LAB_SKFE ; save to cleared stack
|
| 1314 |
|
|
STA LAB_SKFF ; save to cleared stack
|
| 1315 |
|
|
LDX #$FD ; new stack pointer
|
| 1316 |
|
|
TXS ; reset stack
|
| 1317 |
|
|
LDA #$00 ; clear byte
|
| 1318 |
|
|
STA Cpntrh ; clear continue pointer high byte
|
| 1319 |
|
|
STA Sufnxf ; clear subscript/FNX flag
|
| 1320 |
|
|
LAB_14A6
|
| 1321 |
|
|
RTS
|
| 1322 |
|
|
|
| 1323 |
|
|
; perform CLEAR
|
| 1324 |
|
|
|
| 1325 |
|
|
LAB_CLEAR
|
| 1326 |
|
|
BEQ LAB_147A ; if no following token go do "CLEAR"
|
| 1327 |
|
|
|
| 1328 |
|
|
; else there was a following token (go do syntax error)
|
| 1329 |
|
|
RTS
|
| 1330 |
|
|
|
| 1331 |
|
|
; perform LIST [n][-m]
|
| 1332 |
|
|
; bigger, faster version (a _lot_ faster)
|
| 1333 |
|
|
|
| 1334 |
|
|
LAB_LIST
|
| 1335 |
|
|
BCC LAB_14BD ; branch if next character numeric (LIST n..)
|
| 1336 |
|
|
|
| 1337 |
|
|
BEQ LAB_14BD ; branch if next character [NULL] (LIST)
|
| 1338 |
|
|
|
| 1339 |
|
|
CMP #TK_MINUS ; compare with token for -
|
| 1340 |
|
|
BNE LAB_14A6 ; exit if not - (LIST -m)
|
| 1341 |
|
|
|
| 1342 |
|
|
; LIST [[n][-m]]
|
| 1343 |
|
|
; this bit sets the n , if present, as the start and end
|
| 1344 |
|
|
LAB_14BD
|
| 1345 |
|
|
JSR LAB_GFPN ; get fixed-point number into temp integer
|
| 1346 |
|
|
JSR LAB_SSLN ; search BASIC for temp integer line number
|
| 1347 |
|
|
; (pointer in Baslnl/Baslnh)
|
| 1348 |
|
|
JSR LAB_GBYT ; scan memory
|
| 1349 |
|
|
BEQ LAB_14D4 ; branch if no more characters
|
| 1350 |
|
|
|
| 1351 |
|
|
; this bit checks the - is present
|
| 1352 |
|
|
CMP #TK_MINUS ; compare with token for -
|
| 1353 |
|
|
BNE LAB_1460 ; return if not "-" (will be Syntax error)
|
| 1354 |
|
|
|
| 1355 |
|
|
; LIST [n]-m
|
| 1356 |
|
|
; the - was there so set m as the end value
|
| 1357 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 1358 |
|
|
JSR LAB_GFPN ; get fixed-point number into temp integer
|
| 1359 |
|
|
BNE LAB_1460 ; exit if not ok
|
| 1360 |
|
|
|
| 1361 |
|
|
LAB_14D4
|
| 1362 |
|
|
LDA Itempl ; get temporary integer low byte
|
| 1363 |
|
|
ORA Itemph ; OR temporary integer high byte
|
| 1364 |
|
|
BNE LAB_14E2 ; branch if start set
|
| 1365 |
|
|
|
| 1366 |
|
|
LDA #$FF ; set for -1
|
| 1367 |
|
|
STA Itempl ; set temporary integer low byte
|
| 1368 |
|
|
STA Itemph ; set temporary integer high byte
|
| 1369 |
|
|
LAB_14E2
|
| 1370 |
|
|
LDY #$01 ; set index for line
|
| 1371 |
|
|
STY Oquote ; clear open quote flag
|
| 1372 |
|
|
JSR LAB_CRLF ; print CR/LF
|
| 1373 |
|
|
LDA (Baslnl),Y ; get next line pointer high byte
|
| 1374 |
|
|
; pointer initially set by search at LAB_14BD
|
| 1375 |
|
|
BEQ LAB_152B ; if null all done so exit
|
| 1376 |
|
|
JSR LAB_1629 ; do CRTL-C check vector
|
| 1377 |
|
|
|
| 1378 |
|
|
INY ; increment index for line
|
| 1379 |
|
|
LDA (Baslnl),Y ; get line # low byte
|
| 1380 |
|
|
TAX ; copy to X
|
| 1381 |
|
|
INY ; increment index
|
| 1382 |
|
|
LDA (Baslnl),Y ; get line # high byte
|
| 1383 |
|
|
CMP Itemph ; compare with temporary integer high byte
|
| 1384 |
|
|
BNE LAB_14FF ; branch if no high byte match
|
| 1385 |
|
|
|
| 1386 |
|
|
CPX Itempl ; compare with temporary integer low byte
|
| 1387 |
|
|
BEQ LAB_1501 ; branch if = last line to do (< will pass next branch)
|
| 1388 |
|
|
|
| 1389 |
|
|
LAB_14FF ; else ..
|
| 1390 |
|
|
BCS LAB_152B ; if greater all done so exit
|
| 1391 |
|
|
|
| 1392 |
|
|
LAB_1501
|
| 1393 |
|
|
STY Tidx1 ; save index for line
|
| 1394 |
|
|
JSR LAB_295E ; print XA as unsigned integer
|
| 1395 |
|
|
LDA #$20 ; space is the next character
|
| 1396 |
|
|
LAB_1508
|
| 1397 |
|
|
LDY Tidx1 ; get index for line
|
| 1398 |
|
|
AND #$7F ; mask top out bit of character
|
| 1399 |
|
|
LAB_150C
|
| 1400 |
|
|
JSR LAB_PRNA ; go print the character
|
| 1401 |
|
|
CMP #$22 ; was it " character
|
| 1402 |
|
|
BNE LAB_1519 ; branch if not
|
| 1403 |
|
|
|
| 1404 |
|
|
; we are either entering or leaving a pair of quotes
|
| 1405 |
|
|
LDA Oquote ; get open quote flag
|
| 1406 |
|
|
EOR #$FF ; toggle it
|
| 1407 |
|
|
STA Oquote ; save it back
|
| 1408 |
|
|
LAB_1519
|
| 1409 |
|
|
INY ; increment index
|
| 1410 |
|
|
LDA (Baslnl),Y ; get next byte
|
| 1411 |
|
|
BNE LAB_152E ; branch if not [EOL] (go print character)
|
| 1412 |
|
|
TAY ; else clear index
|
| 1413 |
|
|
LDA (Baslnl),Y ; get next line pointer low byte
|
| 1414 |
|
|
TAX ; copy to X
|
| 1415 |
|
|
INY ; increment index
|
| 1416 |
|
|
LDA (Baslnl),Y ; get next line pointer high byte
|
| 1417 |
|
|
STX Baslnl ; set pointer to line low byte
|
| 1418 |
|
|
STA Baslnh ; set pointer to line high byte
|
| 1419 |
|
|
BNE LAB_14E2 ; go do next line if not [EOT]
|
| 1420 |
|
|
; else ..
|
| 1421 |
|
|
LAB_152B
|
| 1422 |
|
|
RTS
|
| 1423 |
|
|
|
| 1424 |
|
|
LAB_152E
|
| 1425 |
|
|
BPL LAB_150C ; just go print it if not token byte
|
| 1426 |
|
|
|
| 1427 |
|
|
; else was token byte so uncrunch it (maybe)
|
| 1428 |
|
|
BIT Oquote ; test the open quote flag
|
| 1429 |
|
|
BMI LAB_150C ; just go print character if open quote set
|
| 1430 |
|
|
|
| 1431 |
|
|
LDX #>LAB_KEYT ; get table address high byte
|
| 1432 |
|
|
ASL ; *2
|
| 1433 |
|
|
ASL ; *4
|
| 1434 |
|
|
BCC LAB_152F ; branch if no carry
|
| 1435 |
|
|
|
| 1436 |
|
|
INX ; else increment high byte
|
| 1437 |
|
|
CLC ; clear carry for add
|
| 1438 |
|
|
LAB_152F
|
| 1439 |
|
|
ADC #
|
| 1440 |
|
|
BCC LAB_1530 ; branch if no carry
|
| 1441 |
|
|
|
| 1442 |
|
|
INX ; else increment high byte
|
| 1443 |
|
|
LAB_1530
|
| 1444 |
|
|
STA ut2_pl ; save table pointer low byte
|
| 1445 |
|
|
STX ut2_ph ; save table pointer high byte
|
| 1446 |
|
|
STY Tidx1 ; save index for line
|
| 1447 |
|
|
LDY #$00 ; clear index
|
| 1448 |
|
|
LDA (ut2_pl),Y ; get length
|
| 1449 |
|
|
TAX ; copy length
|
| 1450 |
|
|
INY ; increment index
|
| 1451 |
|
|
LDA (ut2_pl),Y ; get 1st character
|
| 1452 |
|
|
DEX ; decrement length
|
| 1453 |
|
|
BEQ LAB_1508 ; if no more characters exit and print
|
| 1454 |
|
|
|
| 1455 |
|
|
JSR LAB_PRNA ; go print the character
|
| 1456 |
|
|
INY ; increment index
|
| 1457 |
|
|
LDA (ut2_pl),Y ; get keyword address low byte
|
| 1458 |
|
|
PHA ; save it for now
|
| 1459 |
|
|
INY ; increment index
|
| 1460 |
|
|
LDA (ut2_pl),Y ; get keyword address high byte
|
| 1461 |
|
|
LDY #$00
|
| 1462 |
|
|
STA ut2_ph ; save keyword pointer high byte
|
| 1463 |
|
|
PLA ; pull low byte
|
| 1464 |
|
|
STA ut2_pl ; save keyword pointer low byte
|
| 1465 |
|
|
LAB_1540
|
| 1466 |
|
|
LDA (ut2_pl),Y ; get character
|
| 1467 |
|
|
DEX ; decrement character count
|
| 1468 |
|
|
BEQ LAB_1508 ; if last character exit and print
|
| 1469 |
|
|
|
| 1470 |
|
|
JSR LAB_PRNA ; go print the character
|
| 1471 |
|
|
INY ; increment index
|
| 1472 |
|
|
BNE LAB_1540 ; loop for next character
|
| 1473 |
|
|
|
| 1474 |
|
|
; perform FOR
|
| 1475 |
|
|
|
| 1476 |
|
|
LAB_FOR
|
| 1477 |
|
|
LDA #$80 ; set FNX
|
| 1478 |
|
|
STA Sufnxf ; set subscript/FNX flag
|
| 1479 |
|
|
JSR LAB_LET ; go do LET
|
| 1480 |
|
|
PLA ; pull return address
|
| 1481 |
|
|
PLA ; pull return address
|
| 1482 |
|
|
LDA #$10 ; we need 16d bytes !
|
| 1483 |
|
|
JSR LAB_1212 ; check room on stack for A bytes
|
| 1484 |
|
|
JSR LAB_SNBS ; scan for next BASIC statement ([:] or [EOL])
|
| 1485 |
|
|
CLC ; clear carry for add
|
| 1486 |
|
|
TYA ; copy index to A
|
| 1487 |
|
|
ADC Bpntrl ; add BASIC execute pointer low byte
|
| 1488 |
|
|
PHA ; push onto stack
|
| 1489 |
|
|
LDA Bpntrh ; get BASIC execute pointer high byte
|
| 1490 |
|
|
ADC #$00 ; add carry
|
| 1491 |
|
|
PHA ; push onto stack
|
| 1492 |
|
|
LDA Clineh ; get current line high byte
|
| 1493 |
|
|
PHA ; push onto stack
|
| 1494 |
|
|
LDA Clinel ; get current line low byte
|
| 1495 |
|
|
PHA ; push onto stack
|
| 1496 |
|
|
LDA #TK_TO ; get "TO" token
|
| 1497 |
|
|
JSR LAB_SCCA ; scan for CHR$(A) , else do syntax error then warm start
|
| 1498 |
|
|
JSR LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 1499 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 1500 |
|
|
; else do type mismatch
|
| 1501 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 1502 |
|
|
ORA #$7F ; set all non sign bits
|
| 1503 |
|
|
AND FAC1_1 ; and FAC1 mantissa1
|
| 1504 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 1505 |
|
|
LDA #
|
| 1506 |
|
|
LDY #>LAB_159F ; set return address high byte
|
| 1507 |
|
|
STA ut1_pl ; save return address low byte
|
| 1508 |
|
|
STY ut1_ph ; save return address high byte
|
| 1509 |
|
|
JMP LAB_1B66 ; round FAC1 and put on stack (returns to next instruction)
|
| 1510 |
|
|
|
| 1511 |
|
|
LAB_159F
|
| 1512 |
|
|
LDA #
|
| 1513 |
|
|
LDY #>LAB_259C ; set 1 pointer high addr
|
| 1514 |
|
|
JSR LAB_UFAC ; unpack memory (AY) into FAC1
|
| 1515 |
|
|
JSR LAB_GBYT ; scan memory
|
| 1516 |
|
|
CMP #TK_STEP ; compare with STEP token
|
| 1517 |
|
|
BNE LAB_15B3 ; jump if not "STEP"
|
| 1518 |
|
|
|
| 1519 |
|
|
;.was step so ..
|
| 1520 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 1521 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 1522 |
|
|
; else do type mismatch
|
| 1523 |
|
|
LAB_15B3
|
| 1524 |
|
|
JSR LAB_27CA ; return A=FF,C=1/-ve A=01,C=0/+ve
|
| 1525 |
|
|
STA FAC1_s ; set FAC1 sign (b7)
|
| 1526 |
|
|
; this is +1 for +ve step and -1 for -ve step, in NEXT we
|
| 1527 |
|
|
; compare the FOR value and the TO value and return +1 if
|
| 1528 |
|
|
; FOR > TO, 0 if FOR = TO and -1 if FOR < TO. the value
|
| 1529 |
|
|
; here (+/-1) is then compared to that result and if they
|
| 1530 |
|
|
; are the same (+ve and FOR > TO or -ve and FOR < TO) then
|
| 1531 |
|
|
; the loop is done
|
| 1532 |
|
|
JSR LAB_1B5B ; push sign, round FAC1 and put on stack
|
| 1533 |
|
|
LDA Frnxth ; get var pointer for FOR/NEXT high byte
|
| 1534 |
|
|
PHA ; push on stack
|
| 1535 |
|
|
LDA Frnxtl ; get var pointer for FOR/NEXT low byte
|
| 1536 |
|
|
PHA ; push on stack
|
| 1537 |
|
|
LDA #TK_FOR ; get FOR token
|
| 1538 |
|
|
PHA ; push on stack
|
| 1539 |
|
|
|
| 1540 |
|
|
; interpreter inner loop
|
| 1541 |
|
|
message "LAB_15C2"
|
| 1542 |
|
|
LAB_15C2
|
| 1543 |
|
|
JSR LAB_1629 ; do CRTL-C check vector
|
| 1544 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 1545 |
|
|
LDY Bpntrh ; get BASIC execute pointer high byte
|
| 1546 |
|
|
|
| 1547 |
|
|
LDX Clineh ; continue line is $FFxx for immediate mode
|
| 1548 |
|
|
; ($00xx for RUN from immediate mode)
|
| 1549 |
|
|
INX ; increment it (now $00 if immediate mode)
|
| 1550 |
|
|
BEQ LAB_15D1 ; branch if null (immediate mode)
|
| 1551 |
|
|
|
| 1552 |
|
|
STA Cpntrl ; save continue pointer low byte
|
| 1553 |
|
|
STY Cpntrh ; save continue pointer high byte
|
| 1554 |
|
|
LAB_15D1
|
| 1555 |
|
|
LDY #$00 ; clear index
|
| 1556 |
|
|
LDA (Bpntrl),Y ; get next byte
|
| 1557 |
|
|
BEQ LAB_15DC ; branch if null [EOL]
|
| 1558 |
|
|
|
| 1559 |
|
|
CMP #':' ; compare with ":"
|
| 1560 |
|
|
BEQ LAB_15F6 ; branch if = (statement separator)
|
| 1561 |
|
|
|
| 1562 |
|
|
LAB_15D9
|
| 1563 |
|
|
JMP LAB_SNER ; else syntax error then warm start
|
| 1564 |
|
|
|
| 1565 |
|
|
; have reached [EOL]
|
| 1566 |
|
|
LAB_15DC
|
| 1567 |
|
|
LDY #$02 ; set index
|
| 1568 |
|
|
LDA (Bpntrl),Y ; get next line pointer high byte
|
| 1569 |
|
|
CLC ; clear carry for no "BREAK" message
|
| 1570 |
|
|
BEQ LAB_1651 ; if null go to immediate mode (was immediate or [EOT]
|
| 1571 |
|
|
; marker)
|
| 1572 |
|
|
|
| 1573 |
|
|
INY ; increment index
|
| 1574 |
|
|
LDA (Bpntrl),Y ; get line # low byte
|
| 1575 |
|
|
STA Clinel ; save current line low byte
|
| 1576 |
|
|
INY ; increment index
|
| 1577 |
|
|
LDA (Bpntrl),Y ; get line # high byte
|
| 1578 |
|
|
STA Clineh ; save current line high byte
|
| 1579 |
|
|
TYA ; A now = 4
|
| 1580 |
|
|
ADC Bpntrl ; add BASIC execute pointer low byte
|
| 1581 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 1582 |
|
|
BCC LAB_15F6 ; branch if no overflow
|
| 1583 |
|
|
|
| 1584 |
|
|
INC Bpntrh ; else increment BASIC execute pointer high byte
|
| 1585 |
|
|
LAB_15F6
|
| 1586 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 1587 |
|
|
|
| 1588 |
|
|
LAB_15F9
|
| 1589 |
|
|
JSR LAB_15FF ; go interpret BASIC code from (Bpntrl)
|
| 1590 |
|
|
|
| 1591 |
|
|
LAB_15FC
|
| 1592 |
|
|
JMP LAB_15C2 ; loop
|
| 1593 |
|
|
|
| 1594 |
|
|
; interpret BASIC code from (Bpntrl)
|
| 1595 |
|
|
|
| 1596 |
|
|
LAB_15FF
|
| 1597 |
|
|
BEQ LAB_1628 ; exit if zero [EOL]
|
| 1598 |
|
|
|
| 1599 |
|
|
LAB_1602
|
| 1600 |
|
|
ASL ; *2 bytes per vector and normalise token
|
| 1601 |
|
|
BCS LAB_1609 ; branch if was token
|
| 1602 |
|
|
|
| 1603 |
|
|
JMP LAB_LET ; else go do implied LET
|
| 1604 |
|
|
message "LAB_1609"
|
| 1605 |
|
|
LAB_1609
|
| 1606 |
|
|
CMP #[TK_TAB-$80]*2 ; compare normalised token * 2 with TAB
|
| 1607 |
|
|
BCS LAB_15D9 ; branch if A>=TAB (do syntax error then warm start)
|
| 1608 |
|
|
; only tokens before TAB can start a line
|
| 1609 |
|
|
TAY ; copy to index
|
| 1610 |
|
|
LDA LAB_CTBL+1,Y ; get vector high byte
|
| 1611 |
|
|
PHA ; onto stack
|
| 1612 |
|
|
LDA LAB_CTBL,Y ; get vector low byte
|
| 1613 |
|
|
PHA ; onto stack
|
| 1614 |
|
|
JMP LAB_IGBY ; jump to increment and scan memory
|
| 1615 |
|
|
; then "return" to vector
|
| 1616 |
|
|
|
| 1617 |
|
|
; CTRL-C check jump. this is called as a subroutine but exits back via a jump if a
|
| 1618 |
|
|
; key press is detected.
|
| 1619 |
|
|
message "LAB_1629"
|
| 1620 |
|
|
LAB_1629
|
| 1621 |
|
|
JMP (VEC_CC) ; ctrl c check vector
|
| 1622 |
|
|
|
| 1623 |
|
|
; if there was a key press it gets back here ..
|
| 1624 |
|
|
|
| 1625 |
|
|
LAB_1636
|
| 1626 |
|
|
CMP #$03 ; compare with CTRL-C
|
| 1627 |
|
|
|
| 1628 |
|
|
; perform STOP
|
| 1629 |
|
|
|
| 1630 |
|
|
LAB_STOP
|
| 1631 |
|
|
BCS LAB_163B ; branch if token follows STOP
|
| 1632 |
|
|
; else just END
|
| 1633 |
|
|
; END
|
| 1634 |
|
|
|
| 1635 |
|
|
LAB_END
|
| 1636 |
|
|
CLC ; clear the carry, indicate a normal program end
|
| 1637 |
|
|
LAB_163B
|
| 1638 |
|
|
BNE LAB_167A ; if wasn't CTRL-C or there is a following byte return
|
| 1639 |
|
|
|
| 1640 |
|
|
LDA Bpntrh ; get the BASIC execute pointer high byte
|
| 1641 |
|
|
EOR #>Ibuffs ; compare with buffer address high byte (Cb unchanged)
|
| 1642 |
|
|
BEQ LAB_164F ; branch if the BASIC pointer is in the input buffer
|
| 1643 |
|
|
; (can't continue in immediate mode)
|
| 1644 |
|
|
|
| 1645 |
|
|
; else ..
|
| 1646 |
|
|
EOR #>Ibuffs ; correct the bits
|
| 1647 |
|
|
LDY Bpntrl ; get BASIC execute pointer low byte
|
| 1648 |
|
|
STY Cpntrl ; save continue pointer low byte
|
| 1649 |
|
|
STA Cpntrh ; save continue pointer high byte
|
| 1650 |
|
|
LAB_1647
|
| 1651 |
|
|
LDA Clinel ; get current line low byte
|
| 1652 |
|
|
LDY Clineh ; get current line high byte
|
| 1653 |
|
|
STA Blinel ; save break line low byte
|
| 1654 |
|
|
STY Blineh ; save break line high byte
|
| 1655 |
|
|
LAB_164F
|
| 1656 |
|
|
PLA ; pull return address low
|
| 1657 |
|
|
PLA ; pull return address high
|
| 1658 |
|
|
LAB_1651
|
| 1659 |
|
|
BCC LAB_165E ; if was program end just do warm start
|
| 1660 |
|
|
|
| 1661 |
|
|
; else ..
|
| 1662 |
|
|
LDA #
|
| 1663 |
|
|
LDY #>LAB_BMSG ; point to "Break" high byte
|
| 1664 |
|
|
JMP LAB_1269 ; print "Break" and do warm start
|
| 1665 |
|
|
|
| 1666 |
|
|
LAB_165E
|
| 1667 |
|
|
JMP LAB_1274 ; go do warm start
|
| 1668 |
|
|
|
| 1669 |
|
|
; perform RESTORE
|
| 1670 |
|
|
|
| 1671 |
|
|
LAB_RESTORE
|
| 1672 |
|
|
BNE LAB_RESTOREn ; branch if next character not null (RESTORE n)
|
| 1673 |
|
|
|
| 1674 |
|
|
LAB_161A
|
| 1675 |
|
|
SEC ; set carry for subtract
|
| 1676 |
|
|
LDA Smeml ; get start of mem low byte
|
| 1677 |
|
|
SBC #$01 ; -1
|
| 1678 |
|
|
LDY Smemh ; get start of mem high byte
|
| 1679 |
|
|
BCS LAB_1624 ; branch if no underflow
|
| 1680 |
|
|
|
| 1681 |
|
|
LAB_uflow
|
| 1682 |
|
|
DEY ; else decrement high byte
|
| 1683 |
|
|
LAB_1624
|
| 1684 |
|
|
STA Dptrl ; save DATA pointer low byte
|
| 1685 |
|
|
STY Dptrh ; save DATA pointer high byte
|
| 1686 |
|
|
LAB_1628
|
| 1687 |
|
|
RTS
|
| 1688 |
|
|
|
| 1689 |
|
|
; is RESTORE n
|
| 1690 |
|
|
LAB_RESTOREn
|
| 1691 |
|
|
JSR LAB_GFPN ; get fixed-point number into temp integer
|
| 1692 |
|
|
JSR LAB_SNBL ; scan for next BASIC line
|
| 1693 |
|
|
LDA Clineh ; get current line high byte
|
| 1694 |
|
|
CMP Itemph ; compare with temporary integer high byte
|
| 1695 |
|
|
BCS LAB_reset_search ; branch if >= (start search from beginning)
|
| 1696 |
|
|
|
| 1697 |
|
|
TYA ; else copy line index to A
|
| 1698 |
|
|
SEC ; set carry (+1)
|
| 1699 |
|
|
ADC Bpntrl ; add BASIC execute pointer low byte
|
| 1700 |
|
|
LDX Bpntrh ; get BASIC execute pointer high byte
|
| 1701 |
|
|
BCC LAB_go_search ; branch if no overflow to high byte
|
| 1702 |
|
|
|
| 1703 |
|
|
INX ; increment high byte
|
| 1704 |
|
|
BCS LAB_go_search ; branch always (can never be carry clear)
|
| 1705 |
|
|
|
| 1706 |
|
|
; search for line # in temp (Itempl/Itemph) from start of mem pointer (Smeml)
|
| 1707 |
|
|
|
| 1708 |
|
|
LAB_reset_search
|
| 1709 |
|
|
LDA Smeml ; get start of mem low byte
|
| 1710 |
|
|
LDX Smemh ; get start of mem high byte
|
| 1711 |
|
|
|
| 1712 |
|
|
; search for line # in temp (Itempl/Itemph) from (AX)
|
| 1713 |
|
|
|
| 1714 |
|
|
LAB_go_search
|
| 1715 |
|
|
|
| 1716 |
|
|
JSR LAB_SHLN ; search Basic for temp integer line number from AX
|
| 1717 |
|
|
BCS LAB_line_found ; if carry set go set pointer
|
| 1718 |
|
|
|
| 1719 |
|
|
JMP LAB_16F7 ; else go do "Undefined statement" error
|
| 1720 |
|
|
|
| 1721 |
|
|
LAB_line_found
|
| 1722 |
|
|
; carry already set for subtract
|
| 1723 |
|
|
LDA Baslnl ; get pointer low byte
|
| 1724 |
|
|
SBC #$01 ; -1
|
| 1725 |
|
|
LDY Baslnh ; get pointer high byte
|
| 1726 |
|
|
BCS LAB_1624 ; branch if no underflow (save DATA pointer and return)
|
| 1727 |
|
|
|
| 1728 |
|
|
BCC LAB_uflow ; else decrement high byte then save DATA pointer and
|
| 1729 |
|
|
; return (branch always)
|
| 1730 |
|
|
|
| 1731 |
|
|
; perform NULL
|
| 1732 |
|
|
|
| 1733 |
|
|
LAB_NULL
|
| 1734 |
|
|
JSR LAB_GTBY ; get byte parameter
|
| 1735 |
|
|
STX Nullct ; save new NULL count
|
| 1736 |
|
|
LAB_167A
|
| 1737 |
|
|
RTS
|
| 1738 |
|
|
|
| 1739 |
|
|
; perform CONT
|
| 1740 |
|
|
message "LAB_CONT"
|
| 1741 |
|
|
LAB_CONT
|
| 1742 |
|
|
BNE LAB_167A ; if following byte exit to do syntax error
|
| 1743 |
|
|
|
| 1744 |
|
|
LDY Cpntrh ; get continue pointer high byte
|
| 1745 |
|
|
BNE LAB_166C ; go do continue if we can
|
| 1746 |
|
|
|
| 1747 |
|
|
LDX #$1E ; error code $1E ("Can't continue" error)
|
| 1748 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 1749 |
|
|
|
| 1750 |
|
|
; we can continue so ..
|
| 1751 |
|
|
LAB_166C
|
| 1752 |
|
|
LDA #TK_ON ; set token for ON
|
| 1753 |
|
|
JSR LAB_IRQ ; set IRQ flags
|
| 1754 |
|
|
LDA #TK_ON ; set token for ON
|
| 1755 |
|
|
JSR LAB_NMI ; set NMI flags
|
| 1756 |
|
|
|
| 1757 |
|
|
STY Bpntrh ; save BASIC execute pointer high byte
|
| 1758 |
|
|
LDA Cpntrl ; get continue pointer low byte
|
| 1759 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 1760 |
|
|
LDA Blinel ; get break line low byte
|
| 1761 |
|
|
LDY Blineh ; get break line high byte
|
| 1762 |
|
|
STA Clinel ; set current line low byte
|
| 1763 |
|
|
STY Clineh ; set current line high byte
|
| 1764 |
|
|
RTS
|
| 1765 |
|
|
|
| 1766 |
|
|
; perform RUN
|
| 1767 |
|
|
|
| 1768 |
|
|
LAB_RUN
|
| 1769 |
|
|
BNE LAB_1696 ; branch if RUN n
|
| 1770 |
|
|
JMP LAB_1477 ; reset execution to start, clear variables, flush stack and
|
| 1771 |
|
|
; return
|
| 1772 |
|
|
|
| 1773 |
|
|
; does RUN n
|
| 1774 |
|
|
|
| 1775 |
|
|
LAB_1696
|
| 1776 |
|
|
JSR LAB_147A ; go do "CLEAR"
|
| 1777 |
|
|
BEQ LAB_16B0 ; get n and do GOTO n (branch always as CLEAR sets Z=1)
|
| 1778 |
|
|
|
| 1779 |
|
|
; perform DO
|
| 1780 |
|
|
|
| 1781 |
|
|
LAB_DO
|
| 1782 |
|
|
LDA #$05 ; need 5 bytes for DO
|
| 1783 |
|
|
JSR LAB_1212 ; check room on stack for A bytes
|
| 1784 |
|
|
LDA Bpntrh ; get BASIC execute pointer high byte
|
| 1785 |
|
|
PHA ; push on stack
|
| 1786 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 1787 |
|
|
PHA ; push on stack
|
| 1788 |
|
|
LDA Clineh ; get current line high byte
|
| 1789 |
|
|
PHA ; push on stack
|
| 1790 |
|
|
LDA Clinel ; get current line low byte
|
| 1791 |
|
|
PHA ; push on stack
|
| 1792 |
|
|
LDA #TK_DO ; token for DO
|
| 1793 |
|
|
PHA ; push on stack
|
| 1794 |
|
|
JSR LAB_GBYT ; scan memory
|
| 1795 |
|
|
JMP LAB_15C2 ; go do interpreter inner loop
|
| 1796 |
|
|
|
| 1797 |
|
|
; perform GOSUB
|
| 1798 |
|
|
|
| 1799 |
|
|
LAB_GOSUB
|
| 1800 |
|
|
LDA #$05 ; need 5 bytes for GOSUB
|
| 1801 |
|
|
JSR LAB_1212 ; check room on stack for A bytes
|
| 1802 |
|
|
LDA Bpntrh ; get BASIC execute pointer high byte
|
| 1803 |
|
|
PHA ; push on stack
|
| 1804 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 1805 |
|
|
PHA ; push on stack
|
| 1806 |
|
|
LDA Clineh ; get current line high byte
|
| 1807 |
|
|
PHA ; push on stack
|
| 1808 |
|
|
LDA Clinel ; get current line low byte
|
| 1809 |
|
|
PHA ; push on stack
|
| 1810 |
|
|
LDA #TK_GOSUB ; token for GOSUB
|
| 1811 |
|
|
PHA ; push on stack
|
| 1812 |
|
|
LAB_16B0
|
| 1813 |
|
|
JSR LAB_GBYT ; scan memory
|
| 1814 |
|
|
JSR LAB_GOTO ; perform GOTO n
|
| 1815 |
|
|
JMP LAB_15C2 ; go do interpreter inner loop
|
| 1816 |
|
|
; (can't RTS, we used the stack!)
|
| 1817 |
|
|
|
| 1818 |
|
|
; perform GOTO
|
| 1819 |
|
|
|
| 1820 |
|
|
LAB_GOTO
|
| 1821 |
|
|
JSR LAB_GFPN ; get fixed-point number into temp integer
|
| 1822 |
|
|
JSR LAB_SNBL ; scan for next BASIC line
|
| 1823 |
|
|
LDA Clineh ; get current line high byte
|
| 1824 |
|
|
CMP Itemph ; compare with temporary integer high byte
|
| 1825 |
|
|
BCS LAB_16D0 ; branch if >= (start search from beginning)
|
| 1826 |
|
|
|
| 1827 |
|
|
TYA ; else copy line index to A
|
| 1828 |
|
|
SEC ; set carry (+1)
|
| 1829 |
|
|
ADC Bpntrl ; add BASIC execute pointer low byte
|
| 1830 |
|
|
LDX Bpntrh ; get BASIC execute pointer high byte
|
| 1831 |
|
|
BCC LAB_16D4 ; branch if no overflow to high byte
|
| 1832 |
|
|
|
| 1833 |
|
|
INX ; increment high byte
|
| 1834 |
|
|
BCS LAB_16D4 ; branch always (can never be carry)
|
| 1835 |
|
|
|
| 1836 |
|
|
; search for line # in temp (Itempl/Itemph) from start of mem pointer (Smeml)
|
| 1837 |
|
|
|
| 1838 |
|
|
LAB_16D0
|
| 1839 |
|
|
LDA Smeml ; get start of mem low byte
|
| 1840 |
|
|
LDX Smemh ; get start of mem high byte
|
| 1841 |
|
|
|
| 1842 |
|
|
; search for line # in temp (Itempl/Itemph) from (AX)
|
| 1843 |
|
|
|
| 1844 |
|
|
LAB_16D4
|
| 1845 |
|
|
JSR LAB_SHLN ; search Basic for temp integer line number from AX
|
| 1846 |
|
|
BCC LAB_16F7 ; if carry clear go do "Undefined statement" error
|
| 1847 |
|
|
; (unspecified statement)
|
| 1848 |
|
|
|
| 1849 |
|
|
; carry already set for subtract
|
| 1850 |
|
|
LDA Baslnl ; get pointer low byte
|
| 1851 |
|
|
SBC #$01 ; -1
|
| 1852 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 1853 |
|
|
LDA Baslnh ; get pointer high byte
|
| 1854 |
|
|
SBC #$00 ; subtract carry
|
| 1855 |
|
|
STA Bpntrh ; save BASIC execute pointer high byte
|
| 1856 |
|
|
LAB_16E5
|
| 1857 |
|
|
RTS
|
| 1858 |
|
|
|
| 1859 |
|
|
LAB_DONOK
|
| 1860 |
|
|
LDX #$22 ; error code $22 ("LOOP without DO" error)
|
| 1861 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 1862 |
|
|
|
| 1863 |
|
|
; perform LOOP
|
| 1864 |
|
|
|
| 1865 |
|
|
LAB_LOOP
|
| 1866 |
|
|
TAY ; save following token
|
| 1867 |
|
|
TSX ; copy stack pointer
|
| 1868 |
|
|
LDA LAB_STAK+3,X ; get token byte from stack
|
| 1869 |
|
|
CMP #TK_DO ; compare with DO token
|
| 1870 |
|
|
BNE LAB_DONOK ; branch if no matching DO
|
| 1871 |
|
|
|
| 1872 |
|
|
INX ; dump calling routine return address
|
| 1873 |
|
|
INX ; dump calling routine return address
|
| 1874 |
|
|
TXS ; correct stack
|
| 1875 |
|
|
TYA ; get saved following token back
|
| 1876 |
|
|
BEQ LoopAlways ; if no following token loop forever
|
| 1877 |
|
|
; (stack pointer in X)
|
| 1878 |
|
|
|
| 1879 |
|
|
CMP #':' ; could be ':'
|
| 1880 |
|
|
BEQ LoopAlways ; if :... loop forever
|
| 1881 |
|
|
|
| 1882 |
|
|
SBC #TK_UNTIL ; subtract token for UNTIL, we know carry is set here
|
| 1883 |
|
|
TAX ; copy to X (if it was UNTIL then Y will be correct)
|
| 1884 |
|
|
BEQ DoRest ; branch if was UNTIL
|
| 1885 |
|
|
|
| 1886 |
|
|
DEX ; decrement result
|
| 1887 |
|
|
BNE LAB_16FC ; if not WHILE go do syntax error and warm start
|
| 1888 |
|
|
; only if the token was WHILE will this fail
|
| 1889 |
|
|
|
| 1890 |
|
|
DEX ; set invert result byte
|
| 1891 |
|
|
DoRest
|
| 1892 |
|
|
STX Frnxth ; save invert result byte
|
| 1893 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 1894 |
|
|
JSR LAB_EVEX ; evaluate expression
|
| 1895 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 1896 |
|
|
BEQ DoCmp ; if =0 go do straight compare
|
| 1897 |
|
|
|
| 1898 |
|
|
LDA #$FF ; else set all bits
|
| 1899 |
|
|
DoCmp
|
| 1900 |
|
|
TSX ; copy stack pointer
|
| 1901 |
|
|
EOR Frnxth ; EOR with invert byte
|
| 1902 |
|
|
BNE LoopDone ; if <> 0 clear stack and back to interpreter loop
|
| 1903 |
|
|
|
| 1904 |
|
|
; loop condition wasn't met so do it again
|
| 1905 |
|
|
LoopAlways
|
| 1906 |
|
|
LDA LAB_STAK+2,X ; get current line low byte
|
| 1907 |
|
|
STA Clinel ; save current line low byte
|
| 1908 |
|
|
LDA LAB_STAK+3,X ; get current line high byte
|
| 1909 |
|
|
STA Clineh ; save current line high byte
|
| 1910 |
|
|
LDA LAB_STAK+4,X ; get BASIC execute pointer low byte
|
| 1911 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 1912 |
|
|
LDA LAB_STAK+5,X ; get BASIC execute pointer high byte
|
| 1913 |
|
|
STA Bpntrh ; save BASIC execute pointer high byte
|
| 1914 |
|
|
JSR LAB_GBYT ; scan memory
|
| 1915 |
|
|
JMP LAB_15C2 ; go do interpreter inner loop
|
| 1916 |
|
|
|
| 1917 |
|
|
; clear stack and back to interpreter loop
|
| 1918 |
|
|
LoopDone
|
| 1919 |
|
|
INX ; dump DO token
|
| 1920 |
|
|
INX ; dump current line low byte
|
| 1921 |
|
|
INX ; dump current line high byte
|
| 1922 |
|
|
INX ; dump BASIC execute pointer low byte
|
| 1923 |
|
|
INX ; dump BASIC execute pointer high byte
|
| 1924 |
|
|
TXS ; correct stack
|
| 1925 |
|
|
JMP LAB_DATA ; go perform DATA (find : or [EOL])
|
| 1926 |
|
|
|
| 1927 |
|
|
; do the return without gosub error
|
| 1928 |
|
|
|
| 1929 |
|
|
LAB_16F4
|
| 1930 |
|
|
LDX #$04 ; error code $04 ("RETURN without GOSUB" error)
|
| 1931 |
|
|
.byte $2C ; makes next line BIT LAB_0EA2
|
| 1932 |
|
|
|
| 1933 |
|
|
LAB_16F7 ; do undefined statement error
|
| 1934 |
|
|
LDX #$0E ; error code $0E ("Undefined statement" error)
|
| 1935 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 1936 |
|
|
|
| 1937 |
|
|
; perform RETURN
|
| 1938 |
|
|
|
| 1939 |
|
|
LAB_RETURN
|
| 1940 |
|
|
BNE LAB_16E5 ; exit if following token (to allow syntax error)
|
| 1941 |
|
|
|
| 1942 |
|
|
LAB_16E8
|
| 1943 |
|
|
PLA ; dump calling routine return address
|
| 1944 |
|
|
PLA ; dump calling routine return address
|
| 1945 |
|
|
PLA ; pull token
|
| 1946 |
|
|
CMP #TK_GOSUB ; compare with GOSUB token
|
| 1947 |
|
|
BNE LAB_16F4 ; branch if no matching GOSUB
|
| 1948 |
|
|
|
| 1949 |
|
|
LAB_16FF
|
| 1950 |
|
|
PLA ; pull current line low byte
|
| 1951 |
|
|
STA Clinel ; save current line low byte
|
| 1952 |
|
|
PLA ; pull current line high byte
|
| 1953 |
|
|
STA Clineh ; save current line high byte
|
| 1954 |
|
|
PLA ; pull BASIC execute pointer low byte
|
| 1955 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 1956 |
|
|
PLA ; pull BASIC execute pointer high byte
|
| 1957 |
|
|
STA Bpntrh ; save BASIC execute pointer high byte
|
| 1958 |
|
|
|
| 1959 |
|
|
; now do the DATA statement as we could be returning into
|
| 1960 |
|
|
; the middle of an ON GOSUB n,m,p,q line
|
| 1961 |
|
|
; (the return address used by the DATA statement is the one
|
| 1962 |
|
|
; pushed before the GOSUB was executed!)
|
| 1963 |
|
|
|
| 1964 |
|
|
; perform DATA
|
| 1965 |
|
|
|
| 1966 |
|
|
LAB_DATA
|
| 1967 |
|
|
JSR LAB_SNBS ; scan for next BASIC statement ([:] or [EOL])
|
| 1968 |
|
|
|
| 1969 |
|
|
; set BASIC execute pointer
|
| 1970 |
|
|
LAB_170F
|
| 1971 |
|
|
TYA ; copy index to A
|
| 1972 |
|
|
CLC ; clear carry for add
|
| 1973 |
|
|
ADC Bpntrl ; add BASIC execute pointer low byte
|
| 1974 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 1975 |
|
|
BCC LAB_1719 ; skip next if no carry
|
| 1976 |
|
|
|
| 1977 |
|
|
INC Bpntrh ; else increment BASIC execute pointer high byte
|
| 1978 |
|
|
LAB_1719
|
| 1979 |
|
|
RTS
|
| 1980 |
|
|
|
| 1981 |
|
|
LAB_16FC
|
| 1982 |
|
|
JMP LAB_SNER ; do syntax error then warm start
|
| 1983 |
|
|
|
| 1984 |
|
|
; scan for next BASIC statement ([:] or [EOL])
|
| 1985 |
|
|
; returns Y as index to [:] or [EOL]
|
| 1986 |
|
|
|
| 1987 |
|
|
LAB_SNBS
|
| 1988 |
|
|
LDX #':' ; set look for character = ":"
|
| 1989 |
|
|
.byte $2C ; makes next line BIT $00A2
|
| 1990 |
|
|
|
| 1991 |
|
|
; scan for next BASIC line
|
| 1992 |
|
|
; returns Y as index to [EOL]
|
| 1993 |
|
|
|
| 1994 |
|
|
LAB_SNBL
|
| 1995 |
|
|
LDX #$00 ; set alt search character = [EOL]
|
| 1996 |
|
|
LDY #$00 ; set search character = [EOL]
|
| 1997 |
|
|
STY Asrch ; store search character
|
| 1998 |
|
|
LAB_1725
|
| 1999 |
|
|
TXA ; get alt search character
|
| 2000 |
|
|
EOR Asrch ; toggle search character, effectively swap with $00
|
| 2001 |
|
|
STA Asrch ; save swapped search character
|
| 2002 |
|
|
LAB_172D
|
| 2003 |
|
|
LDA (Bpntrl),Y ; get next byte
|
| 2004 |
|
|
BEQ LAB_1719 ; exit if null [EOL]
|
| 2005 |
|
|
|
| 2006 |
|
|
CMP Asrch ; compare with search character
|
| 2007 |
|
|
BEQ LAB_1719 ; exit if found
|
| 2008 |
|
|
|
| 2009 |
|
|
INY ; increment index
|
| 2010 |
|
|
CMP #$22 ; compare current character with open quote
|
| 2011 |
|
|
BNE LAB_172D ; if not open quote go get next character
|
| 2012 |
|
|
|
| 2013 |
|
|
BEQ LAB_1725 ; if found go swap search character for alt search character
|
| 2014 |
|
|
|
| 2015 |
|
|
; perform IF
|
| 2016 |
|
|
|
| 2017 |
|
|
LAB_IF
|
| 2018 |
|
|
JSR LAB_EVEX ; evaluate the expression
|
| 2019 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2020 |
|
|
CMP #TK_THEN ; compare with THEN token
|
| 2021 |
|
|
BEQ LAB_174B ; if it was THEN go do IF
|
| 2022 |
|
|
|
| 2023 |
|
|
; wasn't IF .. THEN so must be IF .. GOTO
|
| 2024 |
|
|
CMP #TK_GOTO ; compare with GOTO token
|
| 2025 |
|
|
BNE LAB_16FC ; if it wasn't GOTO go do syntax error
|
| 2026 |
|
|
|
| 2027 |
|
|
LDX Bpntrl ; save the basic pointer low byte
|
| 2028 |
|
|
LDY Bpntrh ; save the basic pointer high byte
|
| 2029 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 2030 |
|
|
BCS LAB_16FC ; if not numeric go do syntax error
|
| 2031 |
|
|
|
| 2032 |
|
|
STX Bpntrl ; restore the basic pointer low byte
|
| 2033 |
|
|
STY Bpntrh ; restore the basic pointer high byte
|
| 2034 |
|
|
LAB_174B
|
| 2035 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 2036 |
|
|
BEQ LAB_174E ; if the result was zero go look for an ELSE
|
| 2037 |
|
|
|
| 2038 |
|
|
JSR LAB_IGBY ; else increment and scan memory
|
| 2039 |
|
|
BCS LAB_174D ; if not numeric go do var or keyword
|
| 2040 |
|
|
|
| 2041 |
|
|
LAB_174C
|
| 2042 |
|
|
JMP LAB_GOTO ; else was numeric so do GOTO n
|
| 2043 |
|
|
message "LAB_174D"
|
| 2044 |
|
|
; is var or keyword
|
| 2045 |
|
|
LAB_174D
|
| 2046 |
|
|
CMP #TK_RETURN ; compare the byte with the token for RETURN
|
| 2047 |
|
|
BNE LAB_174G ; if it wasn't RETURN go interpret BASIC code from (Bpntrl)
|
| 2048 |
|
|
; and return to this code to process any following code
|
| 2049 |
|
|
|
| 2050 |
|
|
JMP LAB_1602 ; else it was RETURN so interpret BASIC code from (Bpntrl)
|
| 2051 |
|
|
; but don't return here
|
| 2052 |
|
|
|
| 2053 |
|
|
LAB_174G
|
| 2054 |
|
|
JSR LAB_15FF ; interpret BASIC code from (Bpntrl)
|
| 2055 |
|
|
|
| 2056 |
|
|
; the IF was executed and there may be a following ELSE so the code needs to return
|
| 2057 |
|
|
; here to check and ignore the ELSE if present
|
| 2058 |
|
|
|
| 2059 |
|
|
LDY #$00 ; clear the index
|
| 2060 |
|
|
LDA (Bpntrl),Y ; get the next BASIC byte
|
| 2061 |
|
|
CMP #TK_ELSE ; compare it with the token for ELSE
|
| 2062 |
|
|
BEQ LAB_DATA ; if ELSE ignore the following statement
|
| 2063 |
|
|
|
| 2064 |
|
|
; there was no ELSE so continue execution of IF THEN [: ]. any
|
| 2065 |
|
|
; following ELSE will, correctly, cause a syntax error
|
| 2066 |
|
|
|
| 2067 |
|
|
RTS ; else return to the interpreter inner loop
|
| 2068 |
|
|
|
| 2069 |
|
|
; perform ELSE after IF
|
| 2070 |
|
|
|
| 2071 |
|
|
LAB_174E
|
| 2072 |
|
|
LDY #$00 ; clear the BASIC byte index
|
| 2073 |
|
|
LDX #$01 ; clear the nesting depth
|
| 2074 |
|
|
LAB_1750
|
| 2075 |
|
|
INY ; increment the BASIC byte index
|
| 2076 |
|
|
LDA (Bpntrl),Y ; get the next BASIC byte
|
| 2077 |
|
|
BEQ LAB_1753 ; if EOL go add the pointer and return
|
| 2078 |
|
|
|
| 2079 |
|
|
CMP #TK_IF ; compare the byte with the token for IF
|
| 2080 |
|
|
BNE LAB_1752 ; if not IF token skip the depth increment
|
| 2081 |
|
|
|
| 2082 |
|
|
INX ; else increment the nesting depth ..
|
| 2083 |
|
|
BNE LAB_1750 ; .. and continue looking
|
| 2084 |
|
|
|
| 2085 |
|
|
LAB_1752
|
| 2086 |
|
|
CMP #TK_ELSE ; compare the byte with the token for ELSE
|
| 2087 |
|
|
BNE LAB_1750 ; if not ELSE token continue looking
|
| 2088 |
|
|
|
| 2089 |
|
|
DEX ; was ELSE so decrement the nesting depth
|
| 2090 |
|
|
BNE LAB_1750 ; loop if still nested
|
| 2091 |
|
|
|
| 2092 |
|
|
INY ; increment the BASIC byte index past the ELSE
|
| 2093 |
|
|
|
| 2094 |
|
|
; found the matching ELSE, now do <{n|statement}>
|
| 2095 |
|
|
|
| 2096 |
|
|
LAB_1753
|
| 2097 |
|
|
TYA ; else copy line index to A
|
| 2098 |
|
|
CLC ; clear carry for add
|
| 2099 |
|
|
ADC Bpntrl ; add the BASIC execute pointer low byte
|
| 2100 |
|
|
STA Bpntrl ; save the BASIC execute pointer low byte
|
| 2101 |
|
|
BCC LAB_1754 ; branch if no overflow to high byte
|
| 2102 |
|
|
|
| 2103 |
|
|
INC Bpntrh ; else increment the BASIC execute pointer high byte
|
| 2104 |
|
|
LAB_1754
|
| 2105 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2106 |
|
|
BCC LAB_174C ; if numeric do GOTO n
|
| 2107 |
|
|
; the code will return to the interpreter loop at the
|
| 2108 |
|
|
; tail end of the GOTO
|
| 2109 |
|
|
|
| 2110 |
|
|
JMP LAB_15FF ; interpret BASIC code from (Bpntrl)
|
| 2111 |
|
|
; the code will return to the interpreter loop at the
|
| 2112 |
|
|
; tail end of the
|
| 2113 |
|
|
|
| 2114 |
|
|
; perform REM, skip (rest of) line
|
| 2115 |
|
|
|
| 2116 |
|
|
LAB_REM
|
| 2117 |
|
|
JSR LAB_SNBL ; scan for next BASIC line
|
| 2118 |
|
|
JMP LAB_170F ; go set BASIC execute pointer and return, branch always
|
| 2119 |
|
|
|
| 2120 |
|
|
LAB_16FD
|
| 2121 |
|
|
JMP LAB_SNER ; do syntax error then warm start
|
| 2122 |
|
|
|
| 2123 |
|
|
; perform ON
|
| 2124 |
|
|
|
| 2125 |
|
|
LAB_ON
|
| 2126 |
|
|
CMP #TK_IRQ ; was it IRQ token ?
|
| 2127 |
|
|
BNE LAB_NOIN ; if not go check NMI
|
| 2128 |
|
|
|
| 2129 |
|
|
JMP LAB_SIRQ ; else go set-up IRQ
|
| 2130 |
|
|
|
| 2131 |
|
|
LAB_NOIN
|
| 2132 |
|
|
CMP #TK_NMI ; was it NMI token ?
|
| 2133 |
|
|
BNE LAB_NONM ; if not go do normal ON command
|
| 2134 |
|
|
|
| 2135 |
|
|
JMP LAB_SNMI ; else go set-up NMI
|
| 2136 |
|
|
|
| 2137 |
|
|
LAB_NONM
|
| 2138 |
|
|
JSR LAB_GTBY ; get byte parameter
|
| 2139 |
|
|
PHA ; push GOTO/GOSUB token
|
| 2140 |
|
|
CMP #TK_GOSUB ; compare with GOSUB token
|
| 2141 |
|
|
BEQ LAB_176B ; branch if GOSUB
|
| 2142 |
|
|
|
| 2143 |
|
|
CMP #TK_GOTO ; compare with GOTO token
|
| 2144 |
|
|
LAB_1767
|
| 2145 |
|
|
BNE LAB_16FD ; if not GOTO do syntax error then warm start
|
| 2146 |
|
|
|
| 2147 |
|
|
|
| 2148 |
|
|
; next character was GOTO or GOSUB
|
| 2149 |
|
|
|
| 2150 |
|
|
LAB_176B
|
| 2151 |
|
|
DEC FAC1_3 ; decrement index (byte value)
|
| 2152 |
|
|
BNE LAB_1773 ; branch if not zero
|
| 2153 |
|
|
|
| 2154 |
|
|
PLA ; pull GOTO/GOSUB token
|
| 2155 |
|
|
JMP LAB_1602 ; go execute it
|
| 2156 |
|
|
|
| 2157 |
|
|
LAB_1773
|
| 2158 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 2159 |
|
|
JSR LAB_GFPN ; get fixed-point number into temp integer (skip this n)
|
| 2160 |
|
|
; (we could LDX #',' and JSR LAB_SNBL+2, then we
|
| 2161 |
|
|
; just BNE LAB_176B for the loop. should be quicker ..
|
| 2162 |
|
|
; no we can't, what if we meet a colon or [EOL]?)
|
| 2163 |
|
|
CMP #$2C ; compare next character with ","
|
| 2164 |
|
|
BEQ LAB_176B ; loop if ","
|
| 2165 |
|
|
|
| 2166 |
|
|
LAB_177E
|
| 2167 |
|
|
PLA ; else pull keyword token (run out of options)
|
| 2168 |
|
|
; also dump +/-1 pointer low byte and exit
|
| 2169 |
|
|
LAB_177F
|
| 2170 |
|
|
RTS
|
| 2171 |
|
|
|
| 2172 |
|
|
; takes n * 106 + 11 cycles where n is the number of digits
|
| 2173 |
|
|
|
| 2174 |
|
|
; get fixed-point number into temp integer
|
| 2175 |
|
|
|
| 2176 |
|
|
LAB_GFPN
|
| 2177 |
|
|
LDX #$00 ; clear reg
|
| 2178 |
|
|
STX Itempl ; clear temporary integer low byte
|
| 2179 |
|
|
LAB_1785
|
| 2180 |
|
|
STX Itemph ; save temporary integer high byte
|
| 2181 |
|
|
BCS LAB_177F ; return if carry set, end of scan, character was
|
| 2182 |
|
|
; not 0-9
|
| 2183 |
|
|
|
| 2184 |
|
|
CPX #$19 ; compare high byte with $19
|
| 2185 |
|
|
TAY ; ensure Zb = 0 if the branch is taken
|
| 2186 |
|
|
BCS LAB_1767 ; branch if >=, makes max line # 63999 because next
|
| 2187 |
|
|
; bit does *$0A, = 64000, compare at target will fail
|
| 2188 |
|
|
; and do syntax error
|
| 2189 |
|
|
|
| 2190 |
|
|
SBC #'0'-1 ; subtract "0", $2F + carry, from byte
|
| 2191 |
|
|
TAY ; copy binary digit
|
| 2192 |
|
|
LDA Itempl ; get temporary integer low byte
|
| 2193 |
|
|
ASL ; *2 low byte
|
| 2194 |
|
|
ROL Itemph ; *2 high byte
|
| 2195 |
|
|
ASL ; *2 low byte
|
| 2196 |
|
|
ROL Itemph ; *2 high byte, *4
|
| 2197 |
|
|
ADC Itempl ; + low byte, *5
|
| 2198 |
|
|
STA Itempl ; save it
|
| 2199 |
|
|
TXA ; get high byte copy to A
|
| 2200 |
|
|
ADC Itemph ; + high byte, *5
|
| 2201 |
|
|
ASL Itempl ; *2 low byte, *10d
|
| 2202 |
|
|
ROL ; *2 high byte, *10d
|
| 2203 |
|
|
TAX ; copy high byte back to X
|
| 2204 |
|
|
TYA ; get binary digit back
|
| 2205 |
|
|
ADC Itempl ; add number low byte
|
| 2206 |
|
|
STA Itempl ; save number low byte
|
| 2207 |
|
|
BCC LAB_17B3 ; if no overflow to high byte get next character
|
| 2208 |
|
|
|
| 2209 |
|
|
INX ; else increment high byte
|
| 2210 |
|
|
LAB_17B3
|
| 2211 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 2212 |
|
|
JMP LAB_1785 ; loop for next character
|
| 2213 |
|
|
|
| 2214 |
|
|
; perform DEC
|
| 2215 |
|
|
|
| 2216 |
|
|
LAB_DEC
|
| 2217 |
|
|
LDA #
|
| 2218 |
|
|
.byte $2C ; BIT abs to skip the LDA below
|
| 2219 |
|
|
|
| 2220 |
|
|
; perform INC
|
| 2221 |
|
|
|
| 2222 |
|
|
LAB_INC
|
| 2223 |
|
|
LDA #
|
| 2224 |
|
|
LAB_17B5
|
| 2225 |
|
|
PHA ; save +/-1 pointer low byte
|
| 2226 |
|
|
LAB_17B7
|
| 2227 |
|
|
JSR LAB_GVAR ; get var address
|
| 2228 |
|
|
LDX Dtypef ; get data type flag, $FF=string, $00=numeric
|
| 2229 |
|
|
BMI IncrErr ; exit if string
|
| 2230 |
|
|
|
| 2231 |
|
|
STA Lvarpl ; save var address low byte
|
| 2232 |
|
|
STY Lvarph ; save var address high byte
|
| 2233 |
|
|
JSR LAB_UFAC ; unpack memory (AY) into FAC1
|
| 2234 |
|
|
PLA ; get +/-1 pointer low byte
|
| 2235 |
|
|
PHA ; save +/-1 pointer low byte
|
| 2236 |
|
|
LDY #>LAB_259C ; set +/-1 pointer high byte (both the same)
|
| 2237 |
|
|
JSR LAB_246C ; add (AY) to FAC1
|
| 2238 |
|
|
JSR LAB_PFAC ; pack FAC1 into variable (Lvarpl)
|
| 2239 |
|
|
|
| 2240 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2241 |
|
|
CMP #',' ; compare with ","
|
| 2242 |
|
|
BNE LAB_177E ; exit if not "," (either end or error)
|
| 2243 |
|
|
|
| 2244 |
|
|
; was "," so another INCR variable to do
|
| 2245 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 2246 |
|
|
JMP LAB_17B7 ; go do next var
|
| 2247 |
|
|
|
| 2248 |
|
|
IncrErr
|
| 2249 |
|
|
JMP LAB_1ABC ; do "Type mismatch" error then warm start
|
| 2250 |
|
|
|
| 2251 |
|
|
; perform LET
|
| 2252 |
|
|
|
| 2253 |
|
|
LAB_LET
|
| 2254 |
|
|
JSR LAB_GVAR ; get var address
|
| 2255 |
|
|
STA Lvarpl ; save var address low byte
|
| 2256 |
|
|
STY Lvarph ; save var address high byte
|
| 2257 |
|
|
LDA #TK_EQUAL ; get = token
|
| 2258 |
|
|
JSR LAB_SCCA ; scan for CHR$(A), else do syntax error then warm start
|
| 2259 |
|
|
LDA Dtypef ; get data type flag, $FF=string, $00=numeric
|
| 2260 |
|
|
PHA ; push data type flag
|
| 2261 |
|
|
JSR LAB_EVEX ; evaluate expression
|
| 2262 |
|
|
PLA ; pop data type flag
|
| 2263 |
|
|
ROL ; set carry if type = string
|
| 2264 |
|
|
JSR LAB_CKTM ; type match check, set C for string
|
| 2265 |
|
|
BNE LAB_17D5 ; branch if string
|
| 2266 |
|
|
|
| 2267 |
|
|
JMP LAB_PFAC ; pack FAC1 into variable (Lvarpl) and return
|
| 2268 |
|
|
|
| 2269 |
|
|
; string LET
|
| 2270 |
|
|
|
| 2271 |
|
|
LAB_17D5
|
| 2272 |
|
|
LDY #$02 ; set index to pointer high byte
|
| 2273 |
|
|
LDA (des_pl),Y ; get string pointer high byte
|
| 2274 |
|
|
CMP Sstorh ; compare bottom of string space high byte
|
| 2275 |
|
|
BCC LAB_17F4 ; if less assign value and exit (was in program memory)
|
| 2276 |
|
|
|
| 2277 |
|
|
BNE LAB_17E6 ; branch if >
|
| 2278 |
|
|
; else was equal so compare low bytes
|
| 2279 |
|
|
DEY ; decrement index
|
| 2280 |
|
|
LDA (des_pl),Y ; get pointer low byte
|
| 2281 |
|
|
CMP Sstorl ; compare bottom of string space low byte
|
| 2282 |
|
|
BCC LAB_17F4 ; if less assign value and exit (was in program memory)
|
| 2283 |
|
|
|
| 2284 |
|
|
; pointer was >= to bottom of string space pointer
|
| 2285 |
|
|
LAB_17E6
|
| 2286 |
|
|
LDY des_ph ; get descriptor pointer high byte
|
| 2287 |
|
|
CPY Svarh ; compare start of vars high byte
|
| 2288 |
|
|
BCC LAB_17F4 ; branch if less (descriptor is on stack)
|
| 2289 |
|
|
|
| 2290 |
|
|
BNE LAB_17FB ; branch if greater (descriptor is not on stack)
|
| 2291 |
|
|
|
| 2292 |
|
|
; else high bytes were equal so ..
|
| 2293 |
|
|
LDA des_pl ; get descriptor pointer low byte
|
| 2294 |
|
|
CMP Svarl ; compare start of vars low byte
|
| 2295 |
|
|
BCS LAB_17FB ; branch if >= (descriptor is not on stack)
|
| 2296 |
|
|
|
| 2297 |
|
|
LAB_17F4
|
| 2298 |
|
|
LDA des_pl ; get descriptor pointer low byte
|
| 2299 |
|
|
LDY des_ph ; get descriptor pointer high byte
|
| 2300 |
|
|
JMP LAB_1811 ; clean stack, copy descriptor to variable and return
|
| 2301 |
|
|
|
| 2302 |
|
|
; make space and copy string
|
| 2303 |
|
|
LAB_17FB
|
| 2304 |
|
|
LDY #$00 ; index to length
|
| 2305 |
|
|
LDA (des_pl),Y ; get string length
|
| 2306 |
|
|
JSR LAB_209C ; copy string
|
| 2307 |
|
|
LDA des_2l ; get descriptor pointer low byte
|
| 2308 |
|
|
LDY des_2h ; get descriptor pointer high byte
|
| 2309 |
|
|
STA ssptr_l ; save descriptor pointer low byte
|
| 2310 |
|
|
STY ssptr_h ; save descriptor pointer high byte
|
| 2311 |
|
|
JSR LAB_228A ; copy string from descriptor (sdescr) to (Sutill)
|
| 2312 |
|
|
LDA #
|
| 2313 |
|
|
LDY #>FAC1_e ; get descriptor pointer high byte
|
| 2314 |
|
|
|
| 2315 |
|
|
; clean stack and assign value to string variable
|
| 2316 |
|
|
LAB_1811
|
| 2317 |
|
|
STA des_2l ; save descriptor_2 pointer low byte
|
| 2318 |
|
|
STY des_2h ; save descriptor_2 pointer high byte
|
| 2319 |
|
|
JSR LAB_22EB ; clean descriptor stack, YA = pointer
|
| 2320 |
|
|
LDY #$00 ; index to length
|
| 2321 |
|
|
LDA (des_2l),Y ; get string length
|
| 2322 |
|
|
STA (Lvarpl),Y ; copy to let string variable
|
| 2323 |
|
|
INY ; index to string pointer low byte
|
| 2324 |
|
|
LDA (des_2l),Y ; get string pointer low byte
|
| 2325 |
|
|
STA (Lvarpl),Y ; copy to let string variable
|
| 2326 |
|
|
INY ; index to string pointer high byte
|
| 2327 |
|
|
LDA (des_2l),Y ; get string pointer high byte
|
| 2328 |
|
|
STA (Lvarpl),Y ; copy to let string variable
|
| 2329 |
|
|
RTS
|
| 2330 |
|
|
|
| 2331 |
|
|
; perform GET
|
| 2332 |
|
|
|
| 2333 |
|
|
LAB_GET
|
| 2334 |
|
|
JSR LAB_GVAR ; get var address
|
| 2335 |
|
|
STA Lvarpl ; save var address low byte
|
| 2336 |
|
|
STY Lvarph ; save var address high byte
|
| 2337 |
|
|
JSR INGET ; get input byte
|
| 2338 |
|
|
LDX Dtypef ; get data type flag, $FF=string, $00=numeric
|
| 2339 |
|
|
BMI LAB_GETS ; go get string character
|
| 2340 |
|
|
|
| 2341 |
|
|
; was numeric get
|
| 2342 |
|
|
TAY ; copy character to Y
|
| 2343 |
|
|
JSR LAB_1FD0 ; convert Y to byte in FAC1
|
| 2344 |
|
|
JMP LAB_PFAC ; pack FAC1 into variable (Lvarpl) and return
|
| 2345 |
|
|
|
| 2346 |
|
|
LAB_GETS
|
| 2347 |
|
|
PHA ; save character
|
| 2348 |
|
|
LDA #$01 ; string is single byte
|
| 2349 |
|
|
BCS LAB_IsByte ; branch if byte received
|
| 2350 |
|
|
|
| 2351 |
|
|
PLA ; string is null
|
| 2352 |
|
|
LAB_IsByte
|
| 2353 |
|
|
JSR LAB_MSSP ; make string space A bytes long A=$AC=length,
|
| 2354 |
|
|
; X=$AD=Sutill=ptr low byte, Y=$AE=Sutilh=ptr high byte
|
| 2355 |
|
|
BEQ LAB_NoSt ; skip store if null string
|
| 2356 |
|
|
|
| 2357 |
|
|
PLA ; get character back
|
| 2358 |
|
|
LDY #$00 ; clear index
|
| 2359 |
|
|
STA (str_pl),Y ; save byte in string (byte IS string!)
|
| 2360 |
|
|
LAB_NoSt
|
| 2361 |
|
|
JSR LAB_RTST ; check for space on descriptor stack then put address
|
| 2362 |
|
|
; and length on descriptor stack and update stack pointers
|
| 2363 |
|
|
|
| 2364 |
|
|
JMP LAB_17D5 ; do string LET and return
|
| 2365 |
|
|
|
| 2366 |
|
|
; perform PRINT
|
| 2367 |
|
|
|
| 2368 |
|
|
LAB_1829
|
| 2369 |
|
|
JSR LAB_18C6 ; print string from Sutill/Sutilh
|
| 2370 |
|
|
LAB_182C
|
| 2371 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2372 |
|
|
|
| 2373 |
|
|
; PRINT
|
| 2374 |
|
|
|
| 2375 |
|
|
LAB_PRINT
|
| 2376 |
|
|
BEQ LAB_CRLF ; if nothing following just print CR/LF
|
| 2377 |
|
|
|
| 2378 |
|
|
LAB_1831
|
| 2379 |
|
|
CMP #TK_TAB ; compare with TAB( token
|
| 2380 |
|
|
BEQ LAB_18A2 ; go do TAB/SPC
|
| 2381 |
|
|
|
| 2382 |
|
|
CMP #TK_SPC ; compare with SPC( token
|
| 2383 |
|
|
BEQ LAB_18A2 ; go do TAB/SPC
|
| 2384 |
|
|
|
| 2385 |
|
|
CMP #',' ; compare with ","
|
| 2386 |
|
|
BEQ LAB_188B ; go do move to next TAB mark
|
| 2387 |
|
|
|
| 2388 |
|
|
CMP #';' ; compare with ";"
|
| 2389 |
|
|
BEQ LAB_18BD ; if ";" continue with PRINT processing
|
| 2390 |
|
|
|
| 2391 |
|
|
JSR LAB_EVEX ; evaluate expression
|
| 2392 |
|
|
BIT Dtypef ; test data type flag, $FF=string, $00=numeric
|
| 2393 |
|
|
BMI LAB_1829 ; branch if string
|
| 2394 |
|
|
|
| 2395 |
|
|
JSR LAB_296E ; convert FAC1 to string
|
| 2396 |
|
|
JSR LAB_20AE ; print " terminated string to Sutill/Sutilh
|
| 2397 |
|
|
LDY #$00 ; clear index
|
| 2398 |
|
|
|
| 2399 |
|
|
; don't check fit if terminal width byte is zero
|
| 2400 |
|
|
|
| 2401 |
|
|
LDA TWidth ; get terminal width byte
|
| 2402 |
|
|
BEQ LAB_185E ; skip check if zero
|
| 2403 |
|
|
|
| 2404 |
|
|
SEC ; set carry for subtract
|
| 2405 |
|
|
SBC TPos ; subtract terminal position
|
| 2406 |
|
|
SBC (des_pl),Y ; subtract string length
|
| 2407 |
|
|
BCS LAB_185E ; branch if less than terminal width
|
| 2408 |
|
|
|
| 2409 |
|
|
JSR LAB_CRLF ; else print CR/LF
|
| 2410 |
|
|
LAB_185E
|
| 2411 |
|
|
JSR LAB_18C6 ; print string from Sutill/Sutilh
|
| 2412 |
|
|
BEQ LAB_182C ; always go continue processing line
|
| 2413 |
|
|
|
| 2414 |
|
|
; CR/LF return to BASIC from BASIC input handler
|
| 2415 |
|
|
|
| 2416 |
|
|
LAB_1866
|
| 2417 |
|
|
LDA #$00 ; clear byte
|
| 2418 |
|
|
STA Ibuffs,X ; null terminate input
|
| 2419 |
|
|
LDX #
|
| 2420 |
|
|
LDY #>Ibuffs ; set Y to buffer start-1 high byte
|
| 2421 |
|
|
|
| 2422 |
|
|
; print CR/LF
|
| 2423 |
|
|
|
| 2424 |
|
|
LAB_CRLF
|
| 2425 |
|
|
LDA #$0D ; load [CR]
|
| 2426 |
|
|
JSR LAB_PRNA ; go print the character
|
| 2427 |
|
|
LDA #$0A ; load [LF]
|
| 2428 |
|
|
BNE LAB_PRNA ; go print the character and return, branch always
|
| 2429 |
|
|
|
| 2430 |
|
|
LAB_188B
|
| 2431 |
|
|
LDA TPos ; get terminal position
|
| 2432 |
|
|
CMP Iclim ; compare with input column limit
|
| 2433 |
|
|
BCC LAB_1897 ; branch if less
|
| 2434 |
|
|
|
| 2435 |
|
|
JSR LAB_CRLF ; else print CR/LF (next line)
|
| 2436 |
|
|
BNE LAB_18BD ; continue with PRINT processing (branch always)
|
| 2437 |
|
|
|
| 2438 |
|
|
LAB_1897
|
| 2439 |
|
|
SEC ; set carry for subtract
|
| 2440 |
|
|
LAB_1898
|
| 2441 |
|
|
SBC TabSiz ; subtract TAB size
|
| 2442 |
|
|
BCS LAB_1898 ; loop if result was +ve
|
| 2443 |
|
|
|
| 2444 |
|
|
EOR #$FF ; complement it
|
| 2445 |
|
|
ADC #$01 ; +1 (twos complement)
|
| 2446 |
|
|
BNE LAB_18B6 ; always print A spaces (result is never $00)
|
| 2447 |
|
|
|
| 2448 |
|
|
; do TAB/SPC
|
| 2449 |
|
|
LAB_18A2
|
| 2450 |
|
|
PHA ; save token
|
| 2451 |
|
|
JSR LAB_SGBY ; scan and get byte parameter
|
| 2452 |
|
|
CMP #$29 ; is next character )
|
| 2453 |
|
|
BNE LAB_1910 ; if not do syntax error then warm start
|
| 2454 |
|
|
|
| 2455 |
|
|
PLA ; get token back
|
| 2456 |
|
|
CMP #TK_TAB ; was it TAB ?
|
| 2457 |
|
|
BNE LAB_18B7 ; if not go do SPC
|
| 2458 |
|
|
|
| 2459 |
|
|
; calculate TAB offset
|
| 2460 |
|
|
TXA ; copy integer value to A
|
| 2461 |
|
|
SBC TPos ; subtract terminal position
|
| 2462 |
|
|
BCC LAB_18BD ; branch if result was < 0 (can't TAB backwards)
|
| 2463 |
|
|
|
| 2464 |
|
|
; print A spaces
|
| 2465 |
|
|
LAB_18B6
|
| 2466 |
|
|
TAX ; copy result to X
|
| 2467 |
|
|
LAB_18B7
|
| 2468 |
|
|
TXA ; set flags on size for SPC
|
| 2469 |
|
|
BEQ LAB_18BD ; branch if result was = $0, already here
|
| 2470 |
|
|
|
| 2471 |
|
|
; print X spaces
|
| 2472 |
|
|
LAB_18BA
|
| 2473 |
|
|
JSR LAB_18E0 ; print " "
|
| 2474 |
|
|
DEX ; decrement count
|
| 2475 |
|
|
BNE LAB_18BA ; loop if not all done
|
| 2476 |
|
|
|
| 2477 |
|
|
; continue with PRINT processing
|
| 2478 |
|
|
LAB_18BD
|
| 2479 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 2480 |
|
|
BNE LAB_1831 ; if more to print go do it
|
| 2481 |
|
|
|
| 2482 |
|
|
RTS
|
| 2483 |
|
|
|
| 2484 |
|
|
; print null terminated string from memory
|
| 2485 |
|
|
|
| 2486 |
|
|
LAB_18C3
|
| 2487 |
|
|
JSR LAB_20AE ; print " terminated string to Sutill/Sutilh
|
| 2488 |
|
|
|
| 2489 |
|
|
; print string from Sutill/Sutilh
|
| 2490 |
|
|
|
| 2491 |
|
|
LAB_18C6
|
| 2492 |
|
|
JSR LAB_22B6 ; pop string off descriptor stack, or from top of string
|
| 2493 |
|
|
; space returns with A = length, X=$71=pointer low byte,
|
| 2494 |
|
|
; Y=$72=pointer high byte
|
| 2495 |
|
|
LDY #$00 ; reset index
|
| 2496 |
|
|
TAX ; copy length to X
|
| 2497 |
|
|
BEQ LAB_188C ; exit (RTS) if null string
|
| 2498 |
|
|
|
| 2499 |
|
|
LAB_18CD
|
| 2500 |
|
|
|
| 2501 |
|
|
LDA (ut1_pl),Y ; get next byte
|
| 2502 |
|
|
JSR LAB_PRNA ; go print the character
|
| 2503 |
|
|
INY ; increment index
|
| 2504 |
|
|
DEX ; decrement count
|
| 2505 |
|
|
BNE LAB_18CD ; loop if not done yet
|
| 2506 |
|
|
|
| 2507 |
|
|
RTS
|
| 2508 |
|
|
|
| 2509 |
|
|
; Print single format character
|
| 2510 |
|
|
; print " "
|
| 2511 |
|
|
|
| 2512 |
|
|
LAB_18E0
|
| 2513 |
|
|
LDA #$20 ; load " "
|
| 2514 |
|
|
.byte $2C ; change next line to BIT LAB_3FA9
|
| 2515 |
|
|
|
| 2516 |
|
|
; print "?" character
|
| 2517 |
|
|
|
| 2518 |
|
|
LAB_18E3
|
| 2519 |
|
|
LDA #$3F ; load "?" character
|
| 2520 |
|
|
|
| 2521 |
|
|
; print character in A
|
| 2522 |
|
|
; now includes the null handler
|
| 2523 |
|
|
; also includes infinite line length code
|
| 2524 |
|
|
; note! some routines expect this one to exit with Zb=0
|
| 2525 |
|
|
|
| 2526 |
|
|
LAB_PRNA
|
| 2527 |
|
|
CMP #' ' ; compare with " "
|
| 2528 |
|
|
BCC LAB_18F9 ; branch if less (non printing)
|
| 2529 |
|
|
|
| 2530 |
|
|
; else printable character
|
| 2531 |
|
|
PHA ; save the character
|
| 2532 |
|
|
|
| 2533 |
|
|
; don't check fit if terminal width byte is zero
|
| 2534 |
|
|
|
| 2535 |
|
|
LDA TWidth ; get terminal width
|
| 2536 |
|
|
BNE LAB_18F0 ; branch if not zero (not infinite length)
|
| 2537 |
|
|
|
| 2538 |
|
|
; is "infinite line" so check TAB position
|
| 2539 |
|
|
|
| 2540 |
|
|
LDA TPos ; get position
|
| 2541 |
|
|
SBC TabSiz ; subtract TAB size, carry set by CMP #$20 above
|
| 2542 |
|
|
BNE LAB_18F7 ; skip reset if different
|
| 2543 |
|
|
|
| 2544 |
|
|
STA TPos ; else reset position
|
| 2545 |
|
|
BEQ LAB_18F7 ; go print character
|
| 2546 |
|
|
|
| 2547 |
|
|
LAB_18F0
|
| 2548 |
|
|
CMP TPos ; compare with terminal character position
|
| 2549 |
|
|
BNE LAB_18F7 ; branch if not at end of line
|
| 2550 |
|
|
|
| 2551 |
|
|
JSR LAB_CRLF ; else print CR/LF
|
| 2552 |
|
|
LAB_18F7
|
| 2553 |
|
|
INC TPos ; increment terminal position
|
| 2554 |
|
|
PLA ; get character back
|
| 2555 |
|
|
LAB_18F9
|
| 2556 |
|
|
JSR V_OUTP ; output byte via output vector
|
| 2557 |
|
|
CMP #$0D ; compare with [CR]
|
| 2558 |
|
|
BNE LAB_188A ; branch if not [CR]
|
| 2559 |
|
|
|
| 2560 |
|
|
; else print nullct nulls after the [CR]
|
| 2561 |
|
|
STX TempB ; save buffer index
|
| 2562 |
|
|
LDX Nullct ; get null count
|
| 2563 |
|
|
BEQ LAB_1886 ; branch if no nulls
|
| 2564 |
|
|
|
| 2565 |
|
|
LDA #$00 ; load [NULL]
|
| 2566 |
|
|
LAB_1880
|
| 2567 |
|
|
JSR LAB_PRNA ; go print the character
|
| 2568 |
|
|
DEX ; decrement count
|
| 2569 |
|
|
BNE LAB_1880 ; loop if not all done
|
| 2570 |
|
|
|
| 2571 |
|
|
LDA #$0D ; restore the character (and set the flags)
|
| 2572 |
|
|
LAB_1886
|
| 2573 |
|
|
STX TPos ; clear terminal position (X always = zero when we get here)
|
| 2574 |
|
|
LDX TempB ; restore buffer index
|
| 2575 |
|
|
LAB_188A
|
| 2576 |
|
|
AND #$FF ; set the flags
|
| 2577 |
|
|
LAB_188C
|
| 2578 |
|
|
RTS
|
| 2579 |
|
|
|
| 2580 |
|
|
; handle bad input data
|
| 2581 |
|
|
|
| 2582 |
|
|
LAB_1904
|
| 2583 |
|
|
LDA Imode ; get input mode flag, $00=INPUT, $00=READ
|
| 2584 |
|
|
BPL LAB_1913 ; branch if INPUT (go do redo)
|
| 2585 |
|
|
|
| 2586 |
|
|
LDA Dlinel ; get current DATA line low byte
|
| 2587 |
|
|
LDY Dlineh ; get current DATA line high byte
|
| 2588 |
|
|
STA Clinel ; save current line low byte
|
| 2589 |
|
|
STY Clineh ; save current line high byte
|
| 2590 |
|
|
LAB_1910
|
| 2591 |
|
|
JMP LAB_SNER ; do syntax error then warm start
|
| 2592 |
|
|
|
| 2593 |
|
|
; mode was INPUT
|
| 2594 |
|
|
LAB_1913
|
| 2595 |
|
|
LDA #
|
| 2596 |
|
|
LDY #>LAB_REDO ; point to redo message (high addr)
|
| 2597 |
|
|
JSR LAB_18C3 ; print null terminated string from memory
|
| 2598 |
|
|
LDA Cpntrl ; get continue pointer low byte
|
| 2599 |
|
|
LDY Cpntrh ; get continue pointer high byte
|
| 2600 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 2601 |
|
|
STY Bpntrh ; save BASIC execute pointer high byte
|
| 2602 |
|
|
RTS
|
| 2603 |
|
|
|
| 2604 |
|
|
; perform INPUT
|
| 2605 |
|
|
|
| 2606 |
|
|
LAB_INPUT
|
| 2607 |
|
|
CMP #$22 ; compare next byte with open quote
|
| 2608 |
|
|
BNE LAB_1934 ; branch if no prompt string
|
| 2609 |
|
|
|
| 2610 |
|
|
JSR LAB_1BC1 ; print "..." string
|
| 2611 |
|
|
LDA #$3B ; load A with ";"
|
| 2612 |
|
|
JSR LAB_SCCA ; scan for CHR$(A), else do syntax error then warm start
|
| 2613 |
|
|
JSR LAB_18C6 ; print string from Sutill/Sutilh
|
| 2614 |
|
|
|
| 2615 |
|
|
; done with prompt, now get data
|
| 2616 |
|
|
LAB_1934
|
| 2617 |
|
|
JSR LAB_CKRN ; check not Direct, back here if ok
|
| 2618 |
|
|
JSR LAB_INLN ; print "? " and get BASIC input
|
| 2619 |
|
|
LDA #$00 ; set mode = INPUT
|
| 2620 |
|
|
CMP Ibuffs ; test first byte in buffer
|
| 2621 |
|
|
BNE LAB_1953 ; branch if not null input
|
| 2622 |
|
|
|
| 2623 |
|
|
CLC ; was null input so clear carry to exit program
|
| 2624 |
|
|
JMP LAB_1647 ; go do BREAK exit
|
| 2625 |
|
|
|
| 2626 |
|
|
; perform READ
|
| 2627 |
|
|
|
| 2628 |
|
|
LAB_READ
|
| 2629 |
|
|
LDX Dptrl ; get DATA pointer low byte
|
| 2630 |
|
|
LDY Dptrh ; get DATA pointer high byte
|
| 2631 |
|
|
LDA #$80 ; set mode = READ
|
| 2632 |
|
|
|
| 2633 |
|
|
LAB_1953
|
| 2634 |
|
|
STA Imode ; set input mode flag, $00=INPUT, $80=READ
|
| 2635 |
|
|
STX Rdptrl ; save READ pointer low byte
|
| 2636 |
|
|
STY Rdptrh ; save READ pointer high byte
|
| 2637 |
|
|
|
| 2638 |
|
|
; READ or INPUT next variable from list
|
| 2639 |
|
|
LAB_195B
|
| 2640 |
|
|
JSR LAB_GVAR ; get (var) address
|
| 2641 |
|
|
STA Lvarpl ; save address low byte
|
| 2642 |
|
|
STY Lvarph ; save address high byte
|
| 2643 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 2644 |
|
|
LDY Bpntrh ; get BASIC execute pointer high byte
|
| 2645 |
|
|
STA Itempl ; save as temporary integer low byte
|
| 2646 |
|
|
STY Itemph ; save as temporary integer high byte
|
| 2647 |
|
|
LDX Rdptrl ; get READ pointer low byte
|
| 2648 |
|
|
LDY Rdptrh ; get READ pointer high byte
|
| 2649 |
|
|
STX Bpntrl ; set BASIC execute pointer low byte
|
| 2650 |
|
|
STY Bpntrh ; set BASIC execute pointer high byte
|
| 2651 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2652 |
|
|
BNE LAB_1988 ; branch if not null
|
| 2653 |
|
|
|
| 2654 |
|
|
; pointer was to null entry
|
| 2655 |
|
|
BIT Imode ; test input mode flag, $00=INPUT, $80=READ
|
| 2656 |
|
|
BMI LAB_19DD ; branch if READ
|
| 2657 |
|
|
|
| 2658 |
|
|
; mode was INPUT
|
| 2659 |
|
|
JSR LAB_18E3 ; print "?" character (double ? for extended input)
|
| 2660 |
|
|
JSR LAB_INLN ; print "? " and get BASIC input
|
| 2661 |
|
|
STX Bpntrl ; set BASIC execute pointer low byte
|
| 2662 |
|
|
STY Bpntrh ; set BASIC execute pointer high byte
|
| 2663 |
|
|
LAB_1985
|
| 2664 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2665 |
|
|
LAB_1988
|
| 2666 |
|
|
BIT Dtypef ; test data type flag, $FF=string, $00=numeric
|
| 2667 |
|
|
BPL LAB_19B0 ; branch if numeric
|
| 2668 |
|
|
|
| 2669 |
|
|
; else get string
|
| 2670 |
|
|
STA Srchc ; save search character
|
| 2671 |
|
|
CMP #$22 ; was it " ?
|
| 2672 |
|
|
BEQ LAB_1999 ; branch if so
|
| 2673 |
|
|
|
| 2674 |
|
|
LDA #':' ; else search character is ":"
|
| 2675 |
|
|
STA Srchc ; set new search character
|
| 2676 |
|
|
LDA #',' ; other search character is ","
|
| 2677 |
|
|
CLC ; clear carry for add
|
| 2678 |
|
|
LAB_1999
|
| 2679 |
|
|
STA Asrch ; set second search character
|
| 2680 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 2681 |
|
|
LDY Bpntrh ; get BASIC execute pointer high byte
|
| 2682 |
|
|
|
| 2683 |
|
|
ADC #$00 ; c is =1 if we came via the BEQ LAB_1999, else =0
|
| 2684 |
|
|
BCC LAB_19A4 ; branch if no execute pointer low byte rollover
|
| 2685 |
|
|
|
| 2686 |
|
|
INY ; else increment high byte
|
| 2687 |
|
|
LAB_19A4
|
| 2688 |
|
|
JSR LAB_20B4 ; print Srchc or Asrch terminated string to Sutill/Sutilh
|
| 2689 |
|
|
JSR LAB_23F3 ; restore BASIC execute pointer from temp (Btmpl/Btmph)
|
| 2690 |
|
|
JSR LAB_17D5 ; go do string LET
|
| 2691 |
|
|
JMP LAB_19B6 ; go check string terminator
|
| 2692 |
|
|
|
| 2693 |
|
|
; get numeric INPUT
|
| 2694 |
|
|
LAB_19B0
|
| 2695 |
|
|
JSR LAB_2887 ; get FAC1 from string
|
| 2696 |
|
|
JSR LAB_PFAC ; pack FAC1 into (Lvarpl)
|
| 2697 |
|
|
LAB_19B6
|
| 2698 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2699 |
|
|
BEQ LAB_19C5 ; branch if null (last entry)
|
| 2700 |
|
|
|
| 2701 |
|
|
CMP #',' ; else compare with ","
|
| 2702 |
|
|
BEQ LAB_19C2 ; branch if ","
|
| 2703 |
|
|
|
| 2704 |
|
|
JMP LAB_1904 ; else go handle bad input data
|
| 2705 |
|
|
|
| 2706 |
|
|
; got good input data
|
| 2707 |
|
|
LAB_19C2
|
| 2708 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 2709 |
|
|
LAB_19C5
|
| 2710 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte (temp READ/INPUT ptr)
|
| 2711 |
|
|
LDY Bpntrh ; get BASIC execute pointer high byte (temp READ/INPUT ptr)
|
| 2712 |
|
|
STA Rdptrl ; save for now
|
| 2713 |
|
|
STY Rdptrh ; save for now
|
| 2714 |
|
|
LDA Itempl ; get temporary integer low byte (temp BASIC execute ptr)
|
| 2715 |
|
|
LDY Itemph ; get temporary integer high byte (temp BASIC execute ptr)
|
| 2716 |
|
|
STA Bpntrl ; set BASIC execute pointer low byte
|
| 2717 |
|
|
STY Bpntrh ; set BASIC execute pointer high byte
|
| 2718 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2719 |
|
|
BEQ LAB_1A03 ; if null go do extra ignored message
|
| 2720 |
|
|
|
| 2721 |
|
|
JSR LAB_1C01 ; else scan for "," , else do syntax error then warm start
|
| 2722 |
|
|
JMP LAB_195B ; go INPUT next variable from list
|
| 2723 |
|
|
|
| 2724 |
|
|
; find next DATA statement or do "Out of DATA" error
|
| 2725 |
|
|
LAB_19DD
|
| 2726 |
|
|
JSR LAB_SNBS ; scan for next BASIC statement ([:] or [EOL])
|
| 2727 |
|
|
INY ; increment index
|
| 2728 |
|
|
TAX ; copy character ([:] or [EOL])
|
| 2729 |
|
|
BNE LAB_19F6 ; branch if [:]
|
| 2730 |
|
|
|
| 2731 |
|
|
LDX #$06 ; set for "Out of DATA" error
|
| 2732 |
|
|
INY ; increment index, now points to next line pointer high byte
|
| 2733 |
|
|
LDA (Bpntrl),Y ; get next line pointer high byte
|
| 2734 |
|
|
BEQ LAB_1A54 ; branch if end (eventually does error X)
|
| 2735 |
|
|
|
| 2736 |
|
|
INY ; increment index
|
| 2737 |
|
|
LDA (Bpntrl),Y ; get next line # low byte
|
| 2738 |
|
|
STA Dlinel ; save current DATA line low byte
|
| 2739 |
|
|
INY ; increment index
|
| 2740 |
|
|
LDA (Bpntrl),Y ; get next line # high byte
|
| 2741 |
|
|
INY ; increment index
|
| 2742 |
|
|
STA Dlineh ; save current DATA line high byte
|
| 2743 |
|
|
LAB_19F6
|
| 2744 |
|
|
LDA (Bpntrl),Y ; get byte
|
| 2745 |
|
|
INY ; increment index
|
| 2746 |
|
|
TAX ; copy to X
|
| 2747 |
|
|
JSR LAB_170F ; set BASIC execute pointer
|
| 2748 |
|
|
CPX #TK_DATA ; compare with "DATA" token
|
| 2749 |
|
|
BEQ LAB_1985 ; was "DATA" so go do next READ
|
| 2750 |
|
|
|
| 2751 |
|
|
BNE LAB_19DD ; go find next statement if not "DATA"
|
| 2752 |
|
|
|
| 2753 |
|
|
; end of INPUT/READ routine
|
| 2754 |
|
|
|
| 2755 |
|
|
LAB_1A03
|
| 2756 |
|
|
LDA Rdptrl ; get temp READ pointer low byte
|
| 2757 |
|
|
LDY Rdptrh ; get temp READ pointer high byte
|
| 2758 |
|
|
LDX Imode ; get input mode flag, $00=INPUT, $80=READ
|
| 2759 |
|
|
BPL LAB_1A0E ; branch if INPUT
|
| 2760 |
|
|
|
| 2761 |
|
|
JMP LAB_1624 ; save AY as DATA pointer and return
|
| 2762 |
|
|
|
| 2763 |
|
|
; we were getting INPUT
|
| 2764 |
|
|
LAB_1A0E
|
| 2765 |
|
|
LDY #$00 ; clear index
|
| 2766 |
|
|
LDA (Rdptrl),Y ; get next byte
|
| 2767 |
|
|
BNE LAB_1A1B ; error if not end of INPUT
|
| 2768 |
|
|
|
| 2769 |
|
|
RTS
|
| 2770 |
|
|
|
| 2771 |
|
|
; user typed too much
|
| 2772 |
|
|
LAB_1A1B
|
| 2773 |
|
|
LDA #
|
| 2774 |
|
|
LDY #>LAB_IMSG ; point to extra ignored message (high addr)
|
| 2775 |
|
|
JMP LAB_18C3 ; print null terminated string from memory and return
|
| 2776 |
|
|
|
| 2777 |
|
|
; search the stack for FOR activity
|
| 2778 |
|
|
; exit with z=1 if FOR else exit with z=0
|
| 2779 |
|
|
|
| 2780 |
|
|
LAB_11A1
|
| 2781 |
|
|
TSX ; copy stack pointer
|
| 2782 |
|
|
INX ; +1 pass return address
|
| 2783 |
|
|
INX ; +2 pass return address
|
| 2784 |
|
|
INX ; +3 pass calling routine return address
|
| 2785 |
|
|
INX ; +4 pass calling routine return address
|
| 2786 |
|
|
LAB_11A6
|
| 2787 |
|
|
LDA LAB_STAK+1,X ; get token byte from stack
|
| 2788 |
|
|
CMP #TK_FOR ; is it FOR token
|
| 2789 |
|
|
BNE LAB_11CE ; exit if not FOR token
|
| 2790 |
|
|
|
| 2791 |
|
|
; was FOR token
|
| 2792 |
|
|
LDA Frnxth ; get var pointer for FOR/NEXT high byte
|
| 2793 |
|
|
BNE LAB_11BB ; branch if not null
|
| 2794 |
|
|
|
| 2795 |
|
|
LDA LAB_STAK+2,X ; get FOR variable pointer low byte
|
| 2796 |
|
|
STA Frnxtl ; save var pointer for FOR/NEXT low byte
|
| 2797 |
|
|
LDA LAB_STAK+3,X ; get FOR variable pointer high byte
|
| 2798 |
|
|
STA Frnxth ; save var pointer for FOR/NEXT high byte
|
| 2799 |
|
|
LAB_11BB
|
| 2800 |
|
|
CMP LAB_STAK+3,X ; compare var pointer with stacked var pointer (high byte)
|
| 2801 |
|
|
BNE LAB_11C7 ; branch if no match
|
| 2802 |
|
|
|
| 2803 |
|
|
LDA Frnxtl ; get var pointer for FOR/NEXT low byte
|
| 2804 |
|
|
CMP LAB_STAK+2,X ; compare var pointer with stacked var pointer (low byte)
|
| 2805 |
|
|
BEQ LAB_11CE ; exit if match found
|
| 2806 |
|
|
|
| 2807 |
|
|
LAB_11C7
|
| 2808 |
|
|
TXA ; copy index
|
| 2809 |
|
|
CLC ; clear carry for add
|
| 2810 |
|
|
ADC #$10 ; add FOR stack use size
|
| 2811 |
|
|
TAX ; copy back to index
|
| 2812 |
|
|
BNE LAB_11A6 ; loop if not at start of stack
|
| 2813 |
|
|
|
| 2814 |
|
|
LAB_11CE
|
| 2815 |
|
|
RTS
|
| 2816 |
|
|
|
| 2817 |
|
|
; perform NEXT
|
| 2818 |
|
|
|
| 2819 |
|
|
LAB_NEXT
|
| 2820 |
|
|
BNE LAB_1A46 ; branch if NEXT var
|
| 2821 |
|
|
|
| 2822 |
|
|
LDY #$00 ; else clear Y
|
| 2823 |
|
|
BEQ LAB_1A49 ; branch always (no variable to search for)
|
| 2824 |
|
|
|
| 2825 |
|
|
; NEXT var
|
| 2826 |
|
|
|
| 2827 |
|
|
LAB_1A46
|
| 2828 |
|
|
JSR LAB_GVAR ; get variable address
|
| 2829 |
|
|
LAB_1A49
|
| 2830 |
|
|
STA Frnxtl ; store variable pointer low byte
|
| 2831 |
|
|
STY Frnxth ; store variable pointer high byte
|
| 2832 |
|
|
; (both cleared if no variable defined)
|
| 2833 |
|
|
JSR LAB_11A1 ; search the stack for FOR activity
|
| 2834 |
|
|
BEQ LAB_1A56 ; branch if found
|
| 2835 |
|
|
|
| 2836 |
|
|
LDX #$00 ; else set error $00 ("NEXT without FOR" error)
|
| 2837 |
|
|
LAB_1A54
|
| 2838 |
|
|
BEQ LAB_1ABE ; do error #X, then warm start
|
| 2839 |
|
|
|
| 2840 |
|
|
LAB_1A56
|
| 2841 |
|
|
TXS ; set stack pointer, X set by search, dumps return addresses
|
| 2842 |
|
|
|
| 2843 |
|
|
TXA ; copy stack pointer
|
| 2844 |
|
|
SEC ; set carry for subtract
|
| 2845 |
|
|
SBC #$F7 ; point to TO var
|
| 2846 |
|
|
STA ut2_pl ; save pointer to TO var for compare
|
| 2847 |
|
|
ADC #$FB ; point to STEP var
|
| 2848 |
|
|
|
| 2849 |
|
|
LDY #>LAB_STAK ; point to stack page high byte
|
| 2850 |
|
|
JSR LAB_UFAC ; unpack memory (STEP value) into FAC1
|
| 2851 |
|
|
TSX ; get stack pointer back
|
| 2852 |
|
|
LDA LAB_STAK+8,X ; get step sign
|
| 2853 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 2854 |
|
|
LDA Frnxtl ; get FOR variable pointer low byte
|
| 2855 |
|
|
LDY Frnxth ; get FOR variable pointer high byte
|
| 2856 |
|
|
JSR LAB_246C ; add (FOR variable) to FAC1
|
| 2857 |
|
|
JSR LAB_PFAC ; pack FAC1 into (FOR variable)
|
| 2858 |
|
|
LDY #>LAB_STAK ; point to stack page high byte
|
| 2859 |
|
|
JSR LAB_27FA ; compare FAC1 with (Y,ut2_pl) (TO value)
|
| 2860 |
|
|
TSX ; get stack pointer back
|
| 2861 |
|
|
CMP LAB_STAK+8,X ; compare step sign
|
| 2862 |
|
|
BEQ LAB_1A9B ; branch if = (loop complete)
|
| 2863 |
|
|
|
| 2864 |
|
|
; loop back and do it all again
|
| 2865 |
|
|
LDA LAB_STAK+$0D,X ; get FOR line low byte
|
| 2866 |
|
|
STA Clinel ; save current line low byte
|
| 2867 |
|
|
LDA LAB_STAK+$0E,X ; get FOR line high byte
|
| 2868 |
|
|
STA Clineh ; save current line high byte
|
| 2869 |
|
|
LDA LAB_STAK+$10,X ; get BASIC execute pointer low byte
|
| 2870 |
|
|
STA Bpntrl ; save BASIC execute pointer low byte
|
| 2871 |
|
|
LDA LAB_STAK+$0F,X ; get BASIC execute pointer high byte
|
| 2872 |
|
|
STA Bpntrh ; save BASIC execute pointer high byte
|
| 2873 |
|
|
LAB_1A98
|
| 2874 |
|
|
JMP LAB_15C2 ; go do interpreter inner loop
|
| 2875 |
|
|
|
| 2876 |
|
|
; loop complete so carry on
|
| 2877 |
|
|
LAB_1A9B
|
| 2878 |
|
|
TXA ; stack copy to A
|
| 2879 |
|
|
ADC #$0F ; add $10 ($0F+carry) to dump FOR structure
|
| 2880 |
|
|
TAX ; copy back to index
|
| 2881 |
|
|
TXS ; copy to stack pointer
|
| 2882 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2883 |
|
|
CMP #',' ; compare with ","
|
| 2884 |
|
|
BNE LAB_1A98 ; branch if not "," (go do interpreter inner loop)
|
| 2885 |
|
|
|
| 2886 |
|
|
; was "," so another NEXT variable to do
|
| 2887 |
|
|
JSR LAB_IGBY ; else increment and scan memory
|
| 2888 |
|
|
JSR LAB_1A46 ; do NEXT (var)
|
| 2889 |
|
|
|
| 2890 |
|
|
; evaluate expression and check is numeric, else do type mismatch
|
| 2891 |
|
|
|
| 2892 |
|
|
LAB_EVNM
|
| 2893 |
|
|
JSR LAB_EVEX ; evaluate expression
|
| 2894 |
|
|
|
| 2895 |
|
|
; check if source is numeric, else do type mismatch
|
| 2896 |
|
|
|
| 2897 |
|
|
LAB_CTNM
|
| 2898 |
|
|
CLC ; destination is numeric
|
| 2899 |
|
|
.byte $24 ; makes next line BIT $38
|
| 2900 |
|
|
|
| 2901 |
|
|
; check if source is string, else do type mismatch
|
| 2902 |
|
|
|
| 2903 |
|
|
LAB_CTST
|
| 2904 |
|
|
SEC ; required type is string
|
| 2905 |
|
|
|
| 2906 |
|
|
; type match check, set C for string, clear C for numeric
|
| 2907 |
|
|
|
| 2908 |
|
|
LAB_CKTM
|
| 2909 |
|
|
BIT Dtypef ; test data type flag, $FF=string, $00=numeric
|
| 2910 |
|
|
BMI LAB_1ABA ; branch if data type is string
|
| 2911 |
|
|
|
| 2912 |
|
|
; else data type was numeric
|
| 2913 |
|
|
BCS LAB_1ABC ; if required type is string do type mismatch error
|
| 2914 |
|
|
LAB_1AB9
|
| 2915 |
|
|
RTS
|
| 2916 |
|
|
|
| 2917 |
|
|
; data type was string, now check required type
|
| 2918 |
|
|
LAB_1ABA
|
| 2919 |
|
|
BCS LAB_1AB9 ; exit if required type is string
|
| 2920 |
|
|
|
| 2921 |
|
|
; else do type mismatch error
|
| 2922 |
|
|
LAB_1ABC
|
| 2923 |
|
|
LDX #$18 ; error code $18 ("Type mismatch" error)
|
| 2924 |
|
|
LAB_1ABE
|
| 2925 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 2926 |
|
|
|
| 2927 |
|
|
; evaluate expression
|
| 2928 |
|
|
|
| 2929 |
|
|
LAB_EVEX
|
| 2930 |
|
|
LDX Bpntrl ; get BASIC execute pointer low byte
|
| 2931 |
|
|
BNE LAB_1AC7 ; skip next if not zero
|
| 2932 |
|
|
|
| 2933 |
|
|
DEC Bpntrh ; else decrement BASIC execute pointer high byte
|
| 2934 |
|
|
LAB_1AC7
|
| 2935 |
|
|
DEC Bpntrl ; decrement BASIC execute pointer low byte
|
| 2936 |
|
|
|
| 2937 |
|
|
LAB_EVEZ
|
| 2938 |
|
|
LDA #$00 ; set null precedence (flag done)
|
| 2939 |
|
|
LAB_1ACC
|
| 2940 |
|
|
PHA ; push precedence byte
|
| 2941 |
|
|
LDA #$02 ; 2 bytes
|
| 2942 |
|
|
JSR LAB_1212 ; check room on stack for A bytes
|
| 2943 |
|
|
JSR LAB_GVAL ; get value from line
|
| 2944 |
|
|
LDA #$00 ; clear A
|
| 2945 |
|
|
STA comp_f ; clear compare function flag
|
| 2946 |
|
|
LAB_1ADB
|
| 2947 |
|
|
JSR LAB_GBYT ; scan memory
|
| 2948 |
|
|
LAB_1ADE
|
| 2949 |
|
|
SEC ; set carry for subtract
|
| 2950 |
|
|
SBC #TK_GT ; subtract token for > (lowest comparison function)
|
| 2951 |
|
|
BCC LAB_1AFA ; branch if < TK_GT
|
| 2952 |
|
|
|
| 2953 |
|
|
CMP #$03 ; compare with ">" to "<" tokens
|
| 2954 |
|
|
BCS LAB_1AFA ; branch if >= TK_SGN (highest evaluation function +1)
|
| 2955 |
|
|
|
| 2956 |
|
|
; was token for > = or < (A = 0, 1 or 2)
|
| 2957 |
|
|
CMP #$01 ; compare with token for =
|
| 2958 |
|
|
ROL ; *2, b0 = carry (=1 if token was = or <)
|
| 2959 |
|
|
; (A = 0, 3 or 5)
|
| 2960 |
|
|
EOR #$01 ; toggle b0
|
| 2961 |
|
|
; (A = 1, 2 or 4. 1 if >, 2 if =, 4 if <)
|
| 2962 |
|
|
EOR comp_f ; EOR with compare function flag bits
|
| 2963 |
|
|
CMP comp_f ; compare with compare function flag
|
| 2964 |
|
|
BCC LAB_1B53 ; if <(comp_f) do syntax error then warm start
|
| 2965 |
|
|
; was more than one <, = or >)
|
| 2966 |
|
|
|
| 2967 |
|
|
STA comp_f ; save new compare function flag
|
| 2968 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 2969 |
|
|
JMP LAB_1ADE ; go do next character
|
| 2970 |
|
|
|
| 2971 |
|
|
; token is < ">" or > "<" tokens
|
| 2972 |
|
|
LAB_1AFA
|
| 2973 |
|
|
LDX comp_f ; get compare function flag
|
| 2974 |
|
|
BNE LAB_1B2A ; branch if compare function
|
| 2975 |
|
|
|
| 2976 |
|
|
BCS LAB_1B78 ; go do functions
|
| 2977 |
|
|
|
| 2978 |
|
|
; else was < TK_GT so is operator or lower
|
| 2979 |
|
|
ADC #TK_GT-TK_PLUS ; add # of operators (+, -, *, /, ^, AND, OR or EOR)
|
| 2980 |
|
|
BCC LAB_1B78 ; branch if < + operator
|
| 2981 |
|
|
|
| 2982 |
|
|
; carry was set so token was +, -, *, /, ^, AND, OR or EOR
|
| 2983 |
|
|
BNE LAB_1B0B ; branch if not + token
|
| 2984 |
|
|
|
| 2985 |
|
|
BIT Dtypef ; test data type flag, $FF=string, $00=numeric
|
| 2986 |
|
|
BPL LAB_1B0B ; branch if not string
|
| 2987 |
|
|
|
| 2988 |
|
|
; will only be $00 if type is string and token was +
|
| 2989 |
|
|
JMP LAB_224D ; add strings, string 1 is in descriptor des_pl, string 2
|
| 2990 |
|
|
; is in line, and return
|
| 2991 |
|
|
|
| 2992 |
|
|
LAB_1B0B
|
| 2993 |
|
|
STA ut1_pl ; save it
|
| 2994 |
|
|
ASL ; *2
|
| 2995 |
|
|
ADC ut1_pl ; *3
|
| 2996 |
|
|
TAY ; copy to index
|
| 2997 |
|
|
LAB_1B13
|
| 2998 |
|
|
PLA ; pull previous precedence
|
| 2999 |
|
|
CMP LAB_OPPT,Y ; compare with precedence byte
|
| 3000 |
|
|
BCS LAB_1B7D ; branch if A >=
|
| 3001 |
|
|
|
| 3002 |
|
|
JSR LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 3003 |
|
|
LAB_1B1C
|
| 3004 |
|
|
PHA ; save precedence
|
| 3005 |
|
|
LAB_1B1D
|
| 3006 |
|
|
JSR LAB_1B43 ; get vector, execute function then continue evaluation
|
| 3007 |
|
|
PLA ; restore precedence
|
| 3008 |
|
|
LDY prstk ; get precedence stacked flag
|
| 3009 |
|
|
BPL LAB_1B3C ; branch if stacked values
|
| 3010 |
|
|
|
| 3011 |
|
|
TAX ; copy precedence (set flags)
|
| 3012 |
|
|
BEQ LAB_1B9D ; exit if done
|
| 3013 |
|
|
|
| 3014 |
|
|
BNE LAB_1B86 ; else pop FAC2 and return, branch always
|
| 3015 |
|
|
|
| 3016 |
|
|
LAB_1B2A
|
| 3017 |
|
|
ROL Dtypef ; shift data type flag into Cb
|
| 3018 |
|
|
TXA ; copy compare function flag
|
| 3019 |
|
|
STA Dtypef ; clear data type flag, X is 0xxx xxxx
|
| 3020 |
|
|
ROL ; shift data type into compare function byte b0
|
| 3021 |
|
|
LDX Bpntrl ; get BASIC execute pointer low byte
|
| 3022 |
|
|
BNE LAB_1B34 ; branch if no underflow
|
| 3023 |
|
|
|
| 3024 |
|
|
DEC Bpntrh ; else decrement BASIC execute pointer high byte
|
| 3025 |
|
|
LAB_1B34
|
| 3026 |
|
|
DEC Bpntrl ; decrement BASIC execute pointer low byte
|
| 3027 |
|
|
TK_LT_PLUS = TK_LT-TK_PLUS
|
| 3028 |
|
|
LDY #TK_LT_PLUS*3 ; set offset to last operator entry
|
| 3029 |
|
|
STA comp_f ; save new compare function flag
|
| 3030 |
|
|
BNE LAB_1B13 ; branch always
|
| 3031 |
|
|
|
| 3032 |
|
|
LAB_1B3C
|
| 3033 |
|
|
CMP LAB_OPPT,Y ;.compare with stacked function precedence
|
| 3034 |
|
|
BCS LAB_1B86 ; branch if A >=, pop FAC2 and return
|
| 3035 |
|
|
|
| 3036 |
|
|
BCC LAB_1B1C ; branch always
|
| 3037 |
|
|
|
| 3038 |
|
|
;.get vector, execute function then continue evaluation
|
| 3039 |
|
|
|
| 3040 |
|
|
LAB_1B43
|
| 3041 |
|
|
LDA LAB_OPPT+2,Y ; get function vector high byte
|
| 3042 |
|
|
PHA ; onto stack
|
| 3043 |
|
|
LDA LAB_OPPT+1,Y ; get function vector low byte
|
| 3044 |
|
|
PHA ; onto stack
|
| 3045 |
|
|
; now push sign, round FAC1 and put on stack
|
| 3046 |
|
|
JSR LAB_1B5B ; function will return here, then the next RTS will call
|
| 3047 |
|
|
; the function
|
| 3048 |
|
|
LDA comp_f ; get compare function flag
|
| 3049 |
|
|
PHA ; push compare evaluation byte
|
| 3050 |
|
|
LDA LAB_OPPT,Y ; get precedence byte
|
| 3051 |
|
|
JMP LAB_1ACC ; continue evaluating expression
|
| 3052 |
|
|
|
| 3053 |
|
|
LAB_1B53
|
| 3054 |
|
|
JMP LAB_SNER ; do syntax error then warm start
|
| 3055 |
|
|
|
| 3056 |
|
|
; push sign, round FAC1 and put on stack
|
| 3057 |
|
|
|
| 3058 |
|
|
LAB_1B5B
|
| 3059 |
|
|
PLA ; get return addr low byte
|
| 3060 |
|
|
STA ut1_pl ; save it
|
| 3061 |
|
|
INC ut1_pl ; increment it (was ret-1 pushed? yes!)
|
| 3062 |
|
|
; note! no check is made on the high byte! if the calling
|
| 3063 |
|
|
; routine assembles to a page edge then this all goes
|
| 3064 |
|
|
; horribly wrong !!!
|
| 3065 |
|
|
PLA ; get return addr high byte
|
| 3066 |
|
|
STA ut1_ph ; save it
|
| 3067 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 3068 |
|
|
PHA ; push sign
|
| 3069 |
|
|
|
| 3070 |
|
|
; round FAC1 and put on stack
|
| 3071 |
|
|
|
| 3072 |
|
|
LAB_1B66
|
| 3073 |
|
|
JSR LAB_27BA ; round FAC1
|
| 3074 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 3075 |
|
|
PHA ; push on stack
|
| 3076 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 3077 |
|
|
PHA ; push on stack
|
| 3078 |
|
|
LDA FAC1_1 ; get FAC1 mantissa1
|
| 3079 |
|
|
PHA ; push on stack
|
| 3080 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 3081 |
|
|
PHA ; push on stack
|
| 3082 |
|
|
JMP (ut1_pl) ; return, sort of
|
| 3083 |
|
|
|
| 3084 |
|
|
; do functions
|
| 3085 |
|
|
|
| 3086 |
|
|
LAB_1B78
|
| 3087 |
|
|
LDY #$FF ; flag function
|
| 3088 |
|
|
PLA ; pull precedence byte
|
| 3089 |
|
|
LAB_1B7B
|
| 3090 |
|
|
BEQ LAB_1B9D ; exit if done
|
| 3091 |
|
|
|
| 3092 |
|
|
LAB_1B7D
|
| 3093 |
|
|
CMP #$64 ; compare previous precedence with $64
|
| 3094 |
|
|
BEQ LAB_1B84 ; branch if was $64 (< function)
|
| 3095 |
|
|
|
| 3096 |
|
|
JSR LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 3097 |
|
|
LAB_1B84
|
| 3098 |
|
|
STY prstk ; save precedence stacked flag
|
| 3099 |
|
|
|
| 3100 |
|
|
; pop FAC2 and return
|
| 3101 |
|
|
LAB_1B86
|
| 3102 |
|
|
PLA ; pop byte
|
| 3103 |
|
|
LSR ; shift out comparison evaluation lowest bit
|
| 3104 |
|
|
STA Cflag ; save comparison evaluation flag
|
| 3105 |
|
|
PLA ; pop exponent
|
| 3106 |
|
|
STA FAC2_e ; save FAC2 exponent
|
| 3107 |
|
|
PLA ; pop mantissa1
|
| 3108 |
|
|
STA FAC2_1 ; save FAC2 mantissa1
|
| 3109 |
|
|
PLA ; pop mantissa2
|
| 3110 |
|
|
STA FAC2_2 ; save FAC2 mantissa2
|
| 3111 |
|
|
PLA ; pop mantissa3
|
| 3112 |
|
|
STA FAC2_3 ; save FAC2 mantissa3
|
| 3113 |
|
|
PLA ; pop sign
|
| 3114 |
|
|
STA FAC2_s ; save FAC2 sign (b7)
|
| 3115 |
|
|
EOR FAC1_s ; EOR FAC1 sign (b7)
|
| 3116 |
|
|
STA FAC_sc ; save sign compare (FAC1 EOR FAC2)
|
| 3117 |
|
|
LAB_1B9D
|
| 3118 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 3119 |
|
|
RTS
|
| 3120 |
|
|
|
| 3121 |
|
|
; print "..." string to string util area
|
| 3122 |
|
|
|
| 3123 |
|
|
LAB_1BC1
|
| 3124 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 3125 |
|
|
LDY Bpntrh ; get BASIC execute pointer high byte
|
| 3126 |
|
|
ADC #$00 ; add carry to low byte
|
| 3127 |
|
|
BCC LAB_1BCA ; branch if no overflow
|
| 3128 |
|
|
|
| 3129 |
|
|
INY ; increment high byte
|
| 3130 |
|
|
LAB_1BCA
|
| 3131 |
|
|
JSR LAB_20AE ; print " terminated string to Sutill/Sutilh
|
| 3132 |
|
|
JMP LAB_23F3 ; restore BASIC execute pointer from temp and return
|
| 3133 |
|
|
|
| 3134 |
|
|
; get value from line
|
| 3135 |
|
|
|
| 3136 |
|
|
LAB_GVAL
|
| 3137 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 3138 |
|
|
BCS LAB_1BAC ; branch if not numeric character
|
| 3139 |
|
|
|
| 3140 |
|
|
; else numeric string found (e.g. 123)
|
| 3141 |
|
|
LAB_1BA9
|
| 3142 |
|
|
JMP LAB_2887 ; get FAC1 from string and return
|
| 3143 |
|
|
|
| 3144 |
|
|
; get value from line .. continued
|
| 3145 |
|
|
|
| 3146 |
|
|
; wasn't a number so ..
|
| 3147 |
|
|
LAB_1BAC
|
| 3148 |
|
|
TAX ; set the flags
|
| 3149 |
|
|
BMI LAB_1BD0 ; if -ve go test token values
|
| 3150 |
|
|
|
| 3151 |
|
|
; else it is either a string, number, variable or ()
|
| 3152 |
|
|
CMP #'$' ; compare with "$"
|
| 3153 |
|
|
BEQ LAB_1BA9 ; branch if "$", hex number
|
| 3154 |
|
|
|
| 3155 |
|
|
CMP #'%' ; else compare with "%"
|
| 3156 |
|
|
BEQ LAB_1BA9 ; branch if "%", binary number
|
| 3157 |
|
|
|
| 3158 |
|
|
CMP #'.' ; compare with "."
|
| 3159 |
|
|
BEQ LAB_1BA9 ; if so get FAC1 from string and return (e.g. was .123)
|
| 3160 |
|
|
|
| 3161 |
|
|
; it wasn't any sort of number so ..
|
| 3162 |
|
|
CMP #$22 ; compare with "
|
| 3163 |
|
|
BEQ LAB_1BC1 ; branch if open quote
|
| 3164 |
|
|
|
| 3165 |
|
|
; wasn't any sort of number so ..
|
| 3166 |
|
|
|
| 3167 |
|
|
; evaluate expression within parentheses
|
| 3168 |
|
|
|
| 3169 |
|
|
CMP #'(' ; compare with "("
|
| 3170 |
|
|
BNE LAB_1C18 ; if not "(" get (var), return value in FAC1 and $ flag
|
| 3171 |
|
|
|
| 3172 |
|
|
LAB_1BF7
|
| 3173 |
|
|
JSR LAB_EVEZ ; evaluate expression, no decrement
|
| 3174 |
|
|
|
| 3175 |
|
|
; all the 'scan for' routines return the character after the sought character
|
| 3176 |
|
|
|
| 3177 |
|
|
; scan for ")" , else do syntax error then warm start
|
| 3178 |
|
|
|
| 3179 |
|
|
LAB_1BFB
|
| 3180 |
|
|
LDA #$29 ; load A with ")"
|
| 3181 |
|
|
|
| 3182 |
|
|
; scan for CHR$(A) , else do syntax error then warm start
|
| 3183 |
|
|
|
| 3184 |
|
|
LAB_SCCA
|
| 3185 |
|
|
LDY #$00 ; clear index
|
| 3186 |
|
|
CMP (Bpntrl),Y ; check next byte is = A
|
| 3187 |
|
|
BNE LAB_SNER ; if not do syntax error then warm start
|
| 3188 |
|
|
|
| 3189 |
|
|
JMP LAB_IGBY ; increment and scan memory then return
|
| 3190 |
|
|
|
| 3191 |
|
|
; scan for "(" , else do syntax error then warm start
|
| 3192 |
|
|
|
| 3193 |
|
|
LAB_1BFE
|
| 3194 |
|
|
LDA #$28 ; load A with "("
|
| 3195 |
|
|
BNE LAB_SCCA ; scan for CHR$(A), else do syntax error then warm start
|
| 3196 |
|
|
; (branch always)
|
| 3197 |
|
|
|
| 3198 |
|
|
; scan for "," , else do syntax error then warm start
|
| 3199 |
|
|
|
| 3200 |
|
|
LAB_1C01
|
| 3201 |
|
|
LDA #$2C ; load A with ","
|
| 3202 |
|
|
BNE LAB_SCCA ; scan for CHR$(A), else do syntax error then warm start
|
| 3203 |
|
|
; (branch always)
|
| 3204 |
|
|
|
| 3205 |
|
|
; syntax error then warm start
|
| 3206 |
|
|
|
| 3207 |
|
|
LAB_SNER
|
| 3208 |
|
|
LDX #$02 ; error code $02 ("Syntax" error)
|
| 3209 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 3210 |
|
|
|
| 3211 |
|
|
; get value from line .. continued
|
| 3212 |
|
|
; do tokens
|
| 3213 |
|
|
|
| 3214 |
|
|
LAB_1BD0
|
| 3215 |
|
|
CMP #TK_MINUS ; compare with token for -
|
| 3216 |
|
|
BEQ LAB_1C11 ; branch if - token (do set-up for functions)
|
| 3217 |
|
|
|
| 3218 |
|
|
; wasn't -n so ..
|
| 3219 |
|
|
CMP #TK_PLUS ; compare with token for +
|
| 3220 |
|
|
BEQ LAB_GVAL ; branch if + token (+n = n so ignore leading +)
|
| 3221 |
|
|
|
| 3222 |
|
|
CMP #TK_NOT ; compare with token for NOT
|
| 3223 |
|
|
BNE LAB_1BE7 ; branch if not token for NOT
|
| 3224 |
|
|
|
| 3225 |
|
|
; was NOT token
|
| 3226 |
|
|
TK_EQUAL_PLUS = TK_EQUAL-TK_PLUS
|
| 3227 |
|
|
LDY #TK_EQUAL_PLUS*3 ; offset to NOT function
|
| 3228 |
|
|
BNE LAB_1C13 ; do set-up for function then execute (branch always)
|
| 3229 |
|
|
|
| 3230 |
|
|
; do = compare
|
| 3231 |
|
|
|
| 3232 |
|
|
LAB_EQUAL
|
| 3233 |
|
|
JSR LAB_EVIR ; evaluate integer expression (no sign check)
|
| 3234 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 3235 |
|
|
EOR #$FF ; invert it
|
| 3236 |
|
|
TAY ; copy it
|
| 3237 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 3238 |
|
|
EOR #$FF ; invert it
|
| 3239 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 3240 |
|
|
|
| 3241 |
|
|
; get value from line .. continued
|
| 3242 |
|
|
|
| 3243 |
|
|
; wasn't +, -, or NOT so ..
|
| 3244 |
|
|
LAB_1BE7
|
| 3245 |
|
|
CMP #TK_FN ; compare with token for FN
|
| 3246 |
|
|
BNE LAB_1BEE ; branch if not token for FN
|
| 3247 |
|
|
|
| 3248 |
|
|
JMP LAB_201E ; go evaluate FNx
|
| 3249 |
|
|
|
| 3250 |
|
|
; get value from line .. continued
|
| 3251 |
|
|
|
| 3252 |
|
|
; wasn't +, -, NOT or FN so ..
|
| 3253 |
|
|
LAB_1BEE
|
| 3254 |
|
|
SBC #TK_SGN ; subtract with token for SGN
|
| 3255 |
|
|
BCS LAB_1C27 ; if a function token go do it
|
| 3256 |
|
|
|
| 3257 |
|
|
JMP LAB_SNER ; else do syntax error
|
| 3258 |
|
|
|
| 3259 |
|
|
; set-up for functions
|
| 3260 |
|
|
|
| 3261 |
|
|
LAB_1C11
|
| 3262 |
|
|
TK_GT_PLUS = TK_GT-TK_PLUS
|
| 3263 |
|
|
LDY #TK_GT_PLUS*3 ; set offset from base to > operator
|
| 3264 |
|
|
LAB_1C13
|
| 3265 |
|
|
PLA ; dump return address low byte
|
| 3266 |
|
|
PLA ; dump return address high byte
|
| 3267 |
|
|
JMP LAB_1B1D ; execute function then continue evaluation
|
| 3268 |
|
|
|
| 3269 |
|
|
; variable name set-up
|
| 3270 |
|
|
; get (var), return value in FAC_1 and $ flag
|
| 3271 |
|
|
|
| 3272 |
|
|
LAB_1C18
|
| 3273 |
|
|
JSR LAB_GVAR ; get (var) address
|
| 3274 |
|
|
STA FAC1_2 ; save address low byte in FAC1 mantissa2
|
| 3275 |
|
|
STY FAC1_3 ; save address high byte in FAC1 mantissa3
|
| 3276 |
|
|
LDX Dtypef ; get data type flag, $FF=string, $00=numeric
|
| 3277 |
|
|
BMI LAB_1C25 ; if string then return (does RTS)
|
| 3278 |
|
|
|
| 3279 |
|
|
LAB_1C24
|
| 3280 |
|
|
JMP LAB_UFAC ; unpack memory (AY) into FAC1
|
| 3281 |
|
|
|
| 3282 |
|
|
LAB_1C25
|
| 3283 |
|
|
RTS
|
| 3284 |
|
|
|
| 3285 |
|
|
; get value from line .. continued
|
| 3286 |
|
|
; only functions left so ..
|
| 3287 |
|
|
|
| 3288 |
|
|
; set up function references
|
| 3289 |
|
|
|
| 3290 |
|
|
; new for V2.0+ this replaces a lot of IF .. THEN .. ELSEIF .. THEN .. that was needed
|
| 3291 |
|
|
; to process function calls. now the function vector is computed and pushed on the stack
|
| 3292 |
|
|
; and the preprocess offset is read. if the preprocess offset is non zero then the vector
|
| 3293 |
|
|
; is calculated and the routine called, if not this routine just does RTS. whichever
|
| 3294 |
|
|
; happens the RTS at the end of this routine, or the end of the preprocess routine, calls
|
| 3295 |
|
|
; the function code
|
| 3296 |
|
|
|
| 3297 |
|
|
; this also removes some less than elegant code that was used to bypass type checking
|
| 3298 |
|
|
; for functions that returned strings
|
| 3299 |
|
|
|
| 3300 |
|
|
LAB_1C27
|
| 3301 |
|
|
ASL ; *2 (2 bytes per function address)
|
| 3302 |
|
|
TAY ; copy to index
|
| 3303 |
|
|
|
| 3304 |
|
|
LDA LAB_FTBM,Y ; get function jump vector high byte
|
| 3305 |
|
|
PHA ; push functions jump vector high byte
|
| 3306 |
|
|
LDA LAB_FTBL,Y ; get function jump vector low byte
|
| 3307 |
|
|
PHA ; push functions jump vector low byte
|
| 3308 |
|
|
|
| 3309 |
|
|
LDA LAB_FTPM,Y ; get function pre process vector high byte
|
| 3310 |
|
|
BEQ LAB_1C56 ; skip pre process if null vector
|
| 3311 |
|
|
|
| 3312 |
|
|
PHA ; push functions pre process vector high byte
|
| 3313 |
|
|
LDA LAB_FTPL,Y ; get function pre process vector low byte
|
| 3314 |
|
|
PHA ; push functions pre process vector low byte
|
| 3315 |
|
|
|
| 3316 |
|
|
LAB_1C56
|
| 3317 |
|
|
RTS ; do function, or pre process, call
|
| 3318 |
|
|
|
| 3319 |
|
|
; process string expression in parenthesis
|
| 3320 |
|
|
|
| 3321 |
|
|
LAB_PPFS
|
| 3322 |
|
|
JSR LAB_1BF7 ; process expression in parenthesis
|
| 3323 |
|
|
JMP LAB_CTST ; check if source is string then do function,
|
| 3324 |
|
|
; else do type mismatch
|
| 3325 |
|
|
|
| 3326 |
|
|
; process numeric expression in parenthesis
|
| 3327 |
|
|
|
| 3328 |
|
|
LAB_PPFN
|
| 3329 |
|
|
JSR LAB_1BF7 ; process expression in parenthesis
|
| 3330 |
|
|
JMP LAB_CTNM ; check if source is numeric then do function,
|
| 3331 |
|
|
; else do type mismatch
|
| 3332 |
|
|
|
| 3333 |
|
|
; set numeric data type and increment BASIC execute pointer
|
| 3334 |
|
|
|
| 3335 |
|
|
LAB_PPBI
|
| 3336 |
|
|
LSR Dtypef ; clear data type flag, $FF=string, $00=numeric
|
| 3337 |
|
|
JMP LAB_IGBY ; increment and scan memory then do function
|
| 3338 |
|
|
|
| 3339 |
|
|
; process string for LEFT$, RIGHT$ or MID$
|
| 3340 |
|
|
|
| 3341 |
|
|
LAB_LRMS
|
| 3342 |
|
|
JSR LAB_EVEZ ; evaluate (should be string) expression
|
| 3343 |
|
|
JSR LAB_1C01 ; scan for ",", else do syntax error then warm start
|
| 3344 |
|
|
JSR LAB_CTST ; check if source is string, else do type mismatch
|
| 3345 |
|
|
|
| 3346 |
|
|
PLA ; get function jump vector low byte
|
| 3347 |
|
|
TAX ; save functions jump vector low byte
|
| 3348 |
|
|
PLA ; get function jump vector high byte
|
| 3349 |
|
|
TAY ; save functions jump vector high byte
|
| 3350 |
|
|
LDA des_ph ; get descriptor pointer high byte
|
| 3351 |
|
|
PHA ; push string pointer high byte
|
| 3352 |
|
|
LDA des_pl ; get descriptor pointer low byte
|
| 3353 |
|
|
PHA ; push string pointer low byte
|
| 3354 |
|
|
TYA ; get function jump vector high byte back
|
| 3355 |
|
|
PHA ; save functions jump vector high byte
|
| 3356 |
|
|
TXA ; get function jump vector low byte back
|
| 3357 |
|
|
PHA ; save functions jump vector low byte
|
| 3358 |
|
|
JSR LAB_GTBY ; get byte parameter
|
| 3359 |
|
|
TXA ; copy byte parameter to A
|
| 3360 |
|
|
RTS ; go do function
|
| 3361 |
|
|
|
| 3362 |
|
|
; process numeric expression(s) for BIN$ or HEX$
|
| 3363 |
|
|
|
| 3364 |
|
|
LAB_BHSS
|
| 3365 |
|
|
JSR LAB_EVEZ ; process expression
|
| 3366 |
|
|
JSR LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 3367 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 3368 |
|
|
CMP #$98 ; compare with exponent = 2^24
|
| 3369 |
|
|
BCS LAB_BHER ; branch if n>=2^24 (is too big)
|
| 3370 |
|
|
|
| 3371 |
|
|
JSR LAB_2831 ; convert FAC1 floating-to-fixed
|
| 3372 |
|
|
LDX #$02 ; 3 bytes to do
|
| 3373 |
|
|
LAB_CFAC
|
| 3374 |
|
|
LDA FAC1_1,X ; get byte from FAC1
|
| 3375 |
|
|
STA nums_1,X ; save byte to temp
|
| 3376 |
|
|
DEX ; decrement index
|
| 3377 |
|
|
BPL LAB_CFAC ; copy FAC1 mantissa to temp
|
| 3378 |
|
|
|
| 3379 |
|
|
JSR LAB_GBYT ; get next BASIC byte
|
| 3380 |
|
|
LDX #$00 ; set default to no leading "0"s
|
| 3381 |
|
|
CMP #')' ; compare with close bracket
|
| 3382 |
|
|
BEQ LAB_1C54 ; if ")" go do rest of function
|
| 3383 |
|
|
|
| 3384 |
|
|
JSR LAB_SCGB ; scan for "," and get byte
|
| 3385 |
|
|
JSR LAB_GBYT ; get last byte back
|
| 3386 |
|
|
CMP #')' ; is next character )
|
| 3387 |
|
|
BNE LAB_BHER ; if not ")" go do error
|
| 3388 |
|
|
|
| 3389 |
|
|
LAB_1C54
|
| 3390 |
|
|
RTS ; else do function
|
| 3391 |
|
|
|
| 3392 |
|
|
LAB_BHER
|
| 3393 |
|
|
JMP LAB_FCER ; do function call error then warm start
|
| 3394 |
|
|
|
| 3395 |
|
|
; perform EOR
|
| 3396 |
|
|
|
| 3397 |
|
|
; added operator format is the same as AND or OR, precedence is the same as OR
|
| 3398 |
|
|
|
| 3399 |
|
|
; this bit worked first time but it took a while to sort out the operator table
|
| 3400 |
|
|
; pointers and offsets afterwards!
|
| 3401 |
|
|
|
| 3402 |
|
|
LAB_EOR
|
| 3403 |
|
|
JSR GetFirst ; get first integer expression (no sign check)
|
| 3404 |
|
|
EOR XOAw_l ; EOR with expression 1 low byte
|
| 3405 |
|
|
TAY ; save in Y
|
| 3406 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 3407 |
|
|
EOR XOAw_h ; EOR with expression 1 high byte
|
| 3408 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 3409 |
|
|
|
| 3410 |
|
|
; perform OR
|
| 3411 |
|
|
|
| 3412 |
|
|
LAB_OR
|
| 3413 |
|
|
JSR GetFirst ; get first integer expression (no sign check)
|
| 3414 |
|
|
ORA XOAw_l ; OR with expression 1 low byte
|
| 3415 |
|
|
TAY ; save in Y
|
| 3416 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 3417 |
|
|
ORA XOAw_h ; OR with expression 1 high byte
|
| 3418 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 3419 |
|
|
|
| 3420 |
|
|
; perform AND
|
| 3421 |
|
|
|
| 3422 |
|
|
LAB_AND
|
| 3423 |
|
|
JSR GetFirst ; get first integer expression (no sign check)
|
| 3424 |
|
|
AND XOAw_l ; AND with expression 1 low byte
|
| 3425 |
|
|
TAY ; save in Y
|
| 3426 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 3427 |
|
|
AND XOAw_h ; AND with expression 1 high byte
|
| 3428 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 3429 |
|
|
|
| 3430 |
|
|
; get first value for OR, AND or EOR
|
| 3431 |
|
|
|
| 3432 |
|
|
GetFirst
|
| 3433 |
|
|
JSR LAB_EVIR ; evaluate integer expression (no sign check)
|
| 3434 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 3435 |
|
|
STA XOAw_h ; save it
|
| 3436 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 3437 |
|
|
STA XOAw_l ; save it
|
| 3438 |
|
|
JSR LAB_279B ; copy FAC2 to FAC1 (get 2nd value in expression)
|
| 3439 |
|
|
JSR LAB_EVIR ; evaluate integer expression (no sign check)
|
| 3440 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 3441 |
|
|
LAB_1C95
|
| 3442 |
|
|
RTS
|
| 3443 |
|
|
|
| 3444 |
|
|
; perform comparisons
|
| 3445 |
|
|
|
| 3446 |
|
|
; do < compare
|
| 3447 |
|
|
|
| 3448 |
|
|
LAB_LTHAN
|
| 3449 |
|
|
JSR LAB_CKTM ; type match check, set C for string
|
| 3450 |
|
|
BCS LAB_1CAE ; branch if string
|
| 3451 |
|
|
|
| 3452 |
|
|
; do numeric < compare
|
| 3453 |
|
|
LDA FAC2_s ; get FAC2 sign (b7)
|
| 3454 |
|
|
ORA #$7F ; set all non sign bits
|
| 3455 |
|
|
AND FAC2_1 ; and FAC2 mantissa1 (AND in sign bit)
|
| 3456 |
|
|
STA FAC2_1 ; save FAC2 mantissa1
|
| 3457 |
|
|
LDA #
|
| 3458 |
|
|
LDY #>FAC2_e ; set pointer high byte to FAC2
|
| 3459 |
|
|
JSR LAB_27F8 ; compare FAC1 with FAC2 (AY)
|
| 3460 |
|
|
TAX ; copy result
|
| 3461 |
|
|
JMP LAB_1CE1 ; go evaluate result
|
| 3462 |
|
|
|
| 3463 |
|
|
; do string < compare
|
| 3464 |
|
|
LAB_1CAE
|
| 3465 |
|
|
LSR Dtypef ; clear data type flag, $FF=string, $00=numeric
|
| 3466 |
|
|
DEC comp_f ; clear < bit in compare function flag
|
| 3467 |
|
|
JSR LAB_22B6 ; pop string off descriptor stack, or from top of string
|
| 3468 |
|
|
; space returns with A = length, X=pointer low byte,
|
| 3469 |
|
|
; Y=pointer high byte
|
| 3470 |
|
|
STA str_ln ; save length
|
| 3471 |
|
|
STX str_pl ; save string pointer low byte
|
| 3472 |
|
|
STY str_ph ; save string pointer high byte
|
| 3473 |
|
|
LDA FAC2_2 ; get descriptor pointer low byte
|
| 3474 |
|
|
LDY FAC2_3 ; get descriptor pointer high byte
|
| 3475 |
|
|
JSR LAB_22BA ; pop (YA) descriptor off stack or from top of string space
|
| 3476 |
|
|
; returns with A = length, X=pointer low byte,
|
| 3477 |
|
|
; Y=pointer high byte
|
| 3478 |
|
|
STX FAC2_2 ; save string pointer low byte
|
| 3479 |
|
|
STY FAC2_3 ; save string pointer high byte
|
| 3480 |
|
|
TAX ; copy length
|
| 3481 |
|
|
SEC ; set carry for subtract
|
| 3482 |
|
|
SBC str_ln ; subtract string 1 length
|
| 3483 |
|
|
BEQ LAB_1CD6 ; branch if str 1 length = string 2 length
|
| 3484 |
|
|
|
| 3485 |
|
|
LDA #$01 ; set str 1 length > string 2 length
|
| 3486 |
|
|
BCC LAB_1CD6 ; branch if so
|
| 3487 |
|
|
|
| 3488 |
|
|
LDX str_ln ; get string 1 length
|
| 3489 |
|
|
LDA #$FF ; set str 1 length < string 2 length
|
| 3490 |
|
|
LAB_1CD6
|
| 3491 |
|
|
STA FAC1_s ; save length compare
|
| 3492 |
|
|
LDY #$FF ; set index
|
| 3493 |
|
|
INX ; adjust for loop
|
| 3494 |
|
|
LAB_1CDB
|
| 3495 |
|
|
INY ; increment index
|
| 3496 |
|
|
DEX ; decrement count
|
| 3497 |
|
|
BNE LAB_1CE6 ; branch if still bytes to do
|
| 3498 |
|
|
|
| 3499 |
|
|
LDX FAC1_s ; get length compare back
|
| 3500 |
|
|
LAB_1CE1
|
| 3501 |
|
|
BMI LAB_1CF2 ; branch if str 1 < str 2
|
| 3502 |
|
|
|
| 3503 |
|
|
CLC ; flag str 1 <= str 2
|
| 3504 |
|
|
BCC LAB_1CF2 ; go evaluate result
|
| 3505 |
|
|
|
| 3506 |
|
|
LAB_1CE6
|
| 3507 |
|
|
LDA (FAC2_2),Y ; get string 2 byte
|
| 3508 |
|
|
CMP (FAC1_1),Y ; compare with string 1 byte
|
| 3509 |
|
|
BEQ LAB_1CDB ; loop if bytes =
|
| 3510 |
|
|
|
| 3511 |
|
|
LDX #$FF ; set str 1 < string 2
|
| 3512 |
|
|
BCS LAB_1CF2 ; branch if so
|
| 3513 |
|
|
|
| 3514 |
|
|
LDX #$01 ; set str 1 > string 2
|
| 3515 |
|
|
LAB_1CF2
|
| 3516 |
|
|
INX ; x = 0, 1 or 2
|
| 3517 |
|
|
TXA ; copy to A
|
| 3518 |
|
|
ROL ; *2 (1, 2 or 4)
|
| 3519 |
|
|
AND Cflag ; AND with comparison evaluation flag
|
| 3520 |
|
|
BEQ LAB_1CFB ; branch if 0 (compare is false)
|
| 3521 |
|
|
|
| 3522 |
|
|
LDA #$FF ; else set result true
|
| 3523 |
|
|
LAB_1CFB
|
| 3524 |
|
|
JMP LAB_27DB ; save A as integer byte and return
|
| 3525 |
|
|
|
| 3526 |
|
|
LAB_1CFE
|
| 3527 |
|
|
JSR LAB_1C01 ; scan for ",", else do syntax error then warm start
|
| 3528 |
|
|
|
| 3529 |
|
|
; perform DIM
|
| 3530 |
|
|
|
| 3531 |
|
|
LAB_DIM
|
| 3532 |
|
|
TAX ; copy "DIM" flag to X
|
| 3533 |
|
|
JSR LAB_1D10 ; search for variable
|
| 3534 |
|
|
JSR LAB_GBYT ; scan memory
|
| 3535 |
|
|
BNE LAB_1CFE ; scan for "," and loop if not null
|
| 3536 |
|
|
|
| 3537 |
|
|
RTS
|
| 3538 |
|
|
|
| 3539 |
|
|
; perform << (left shift)
|
| 3540 |
|
|
|
| 3541 |
|
|
LAB_LSHIFT
|
| 3542 |
|
|
JSR GetPair ; get integer expression and byte (no sign check)
|
| 3543 |
|
|
LDA FAC1_2 ; get expression high byte
|
| 3544 |
|
|
LDX TempB ; get shift count
|
| 3545 |
|
|
BEQ NoShift ; branch if zero
|
| 3546 |
|
|
|
| 3547 |
|
|
CPX #$10 ; compare bit count with 16d
|
| 3548 |
|
|
BCS TooBig ; branch if >=
|
| 3549 |
|
|
|
| 3550 |
|
|
Ls_loop
|
| 3551 |
|
|
ASL FAC1_3 ; shift low byte
|
| 3552 |
|
|
ROL ; shift high byte
|
| 3553 |
|
|
DEX ; decrement bit count
|
| 3554 |
|
|
BNE Ls_loop ; loop if shift not complete
|
| 3555 |
|
|
|
| 3556 |
|
|
LDY FAC1_3 ; get expression low byte
|
| 3557 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 3558 |
|
|
|
| 3559 |
|
|
; perform >> (right shift)
|
| 3560 |
|
|
|
| 3561 |
|
|
LAB_RSHIFT
|
| 3562 |
|
|
JSR GetPair ; get integer expression and byte (no sign check)
|
| 3563 |
|
|
LDA FAC1_2 ; get expression high byte
|
| 3564 |
|
|
LDX TempB ; get shift count
|
| 3565 |
|
|
BEQ NoShift ; branch if zero
|
| 3566 |
|
|
|
| 3567 |
|
|
CPX #$10 ; compare bit count with 16d
|
| 3568 |
|
|
BCS TooBig ; branch if >=
|
| 3569 |
|
|
|
| 3570 |
|
|
Rs_loop
|
| 3571 |
|
|
LSR ; shift high byte
|
| 3572 |
|
|
ROR FAC1_3 ; shift low byte
|
| 3573 |
|
|
DEX ; decrement bit count
|
| 3574 |
|
|
BNE Rs_loop ; loop if shift not complete
|
| 3575 |
|
|
|
| 3576 |
|
|
NoShift
|
| 3577 |
|
|
LDY FAC1_3 ; get expression low byte
|
| 3578 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 3579 |
|
|
|
| 3580 |
|
|
TooBig
|
| 3581 |
|
|
LDA #$00 ; clear high byte
|
| 3582 |
|
|
TAY ; copy to low byte
|
| 3583 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 3584 |
|
|
|
| 3585 |
|
|
GetPair
|
| 3586 |
|
|
JSR LAB_EVBY ; evaluate byte expression, result in X
|
| 3587 |
|
|
STX TempB ; save it
|
| 3588 |
|
|
JSR LAB_279B ; copy FAC2 to FAC1 (get 2nd value in expression)
|
| 3589 |
|
|
JMP LAB_EVIR ; evaluate integer expression (no sign check)
|
| 3590 |
|
|
|
| 3591 |
|
|
; search for variable
|
| 3592 |
|
|
|
| 3593 |
|
|
; return pointer to variable in Cvaral/Cvarah
|
| 3594 |
|
|
|
| 3595 |
|
|
LAB_GVAR
|
| 3596 |
|
|
LDX #$00 ; set DIM flag = $00
|
| 3597 |
|
|
JSR LAB_GBYT ; scan memory (1st character)
|
| 3598 |
|
|
LAB_1D10
|
| 3599 |
|
|
STX Defdim ; save DIM flag
|
| 3600 |
|
|
LAB_1D12
|
| 3601 |
|
|
STA Varnm1 ; save 1st character
|
| 3602 |
|
|
AND #$7F ; clear FN flag bit
|
| 3603 |
|
|
JSR LAB_CASC ; check byte, return C=0 if<"A" or >"Z"
|
| 3604 |
|
|
BCS LAB_1D1F ; branch if ok
|
| 3605 |
|
|
|
| 3606 |
|
|
JMP LAB_SNER ; else syntax error then warm start
|
| 3607 |
|
|
|
| 3608 |
|
|
; was variable name so ..
|
| 3609 |
|
|
LAB_1D1F
|
| 3610 |
|
|
LDX #$00 ; clear 2nd character temp
|
| 3611 |
|
|
STX Dtypef ; clear data type flag, $FF=string, $00=numeric
|
| 3612 |
|
|
JSR LAB_IGBY ; increment and scan memory (2nd character)
|
| 3613 |
|
|
BCC LAB_1D2D ; branch if character = "0"-"9" (ok)
|
| 3614 |
|
|
|
| 3615 |
|
|
; 2nd character wasn't "0" to "9" so ..
|
| 3616 |
|
|
JSR LAB_CASC ; check byte, return C=0 if<"A" or >"Z"
|
| 3617 |
|
|
BCC LAB_1D38 ; branch if <"A" or >"Z" (go check if string)
|
| 3618 |
|
|
|
| 3619 |
|
|
LAB_1D2D
|
| 3620 |
|
|
TAX ; copy 2nd character
|
| 3621 |
|
|
|
| 3622 |
|
|
; ignore further (valid) characters in the variable name
|
| 3623 |
|
|
LAB_1D2E
|
| 3624 |
|
|
JSR LAB_IGBY ; increment and scan memory (3rd character)
|
| 3625 |
|
|
BCC LAB_1D2E ; loop if character = "0"-"9" (ignore)
|
| 3626 |
|
|
|
| 3627 |
|
|
JSR LAB_CASC ; check byte, return C=0 if<"A" or >"Z"
|
| 3628 |
|
|
BCS LAB_1D2E ; loop if character = "A"-"Z" (ignore)
|
| 3629 |
|
|
|
| 3630 |
|
|
; check if string variable
|
| 3631 |
|
|
LAB_1D38
|
| 3632 |
|
|
CMP #'$' ; compare with "$"
|
| 3633 |
|
|
BNE LAB_1D47 ; branch if not string
|
| 3634 |
|
|
|
| 3635 |
|
|
; to introduce a new variable type (% suffix for integers say) then this branch
|
| 3636 |
|
|
; will need to go to that check and then that branch, if it fails, go to LAB_1D47
|
| 3637 |
|
|
|
| 3638 |
|
|
; type is string
|
| 3639 |
|
|
LDA #$FF ; set data type = string
|
| 3640 |
|
|
STA Dtypef ; set data type flag, $FF=string, $00=numeric
|
| 3641 |
|
|
TXA ; get 2nd character back
|
| 3642 |
|
|
ORA #$80 ; set top bit (indicate string var)
|
| 3643 |
|
|
TAX ; copy back to 2nd character temp
|
| 3644 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 3645 |
|
|
|
| 3646 |
|
|
; after we have determined the variable type we need to come back here to determine
|
| 3647 |
|
|
; if it's an array of type. this would plug in a%(b[,c[,d]])) integer arrays nicely
|
| 3648 |
|
|
|
| 3649 |
|
|
|
| 3650 |
|
|
LAB_1D47 ; gets here with character after var name in A
|
| 3651 |
|
|
STX Varnm2 ; save 2nd character
|
| 3652 |
|
|
ORA Sufnxf ; or with subscript/FNX flag (or FN name)
|
| 3653 |
|
|
CMP #'(' ; compare with "("
|
| 3654 |
|
|
BNE LAB_1D53 ; branch if not "("
|
| 3655 |
|
|
|
| 3656 |
|
|
JMP LAB_1E17 ; go find, or make, array
|
| 3657 |
|
|
|
| 3658 |
|
|
; either find or create var
|
| 3659 |
|
|
; var name (1st two characters only!) is in Varnm1,Varnm2
|
| 3660 |
|
|
|
| 3661 |
|
|
; variable name wasn't var(... so look for plain var
|
| 3662 |
|
|
LAB_1D53
|
| 3663 |
|
|
LDA #$00 ; clear A
|
| 3664 |
|
|
STA Sufnxf ; clear subscript/FNX flag
|
| 3665 |
|
|
LDA Svarl ; get start of vars low byte
|
| 3666 |
|
|
LDX Svarh ; get start of vars high byte
|
| 3667 |
|
|
LDY #$00 ; clear index
|
| 3668 |
|
|
LAB_1D5D
|
| 3669 |
|
|
STX Vrschh ; save search address high byte
|
| 3670 |
|
|
LAB_1D5F
|
| 3671 |
|
|
STA Vrschl ; save search address low byte
|
| 3672 |
|
|
CPX Sarryh ; compare high address with var space end
|
| 3673 |
|
|
BNE LAB_1D69 ; skip next compare if <>
|
| 3674 |
|
|
|
| 3675 |
|
|
; high addresses were = so compare low addresses
|
| 3676 |
|
|
CMP Sarryl ; compare low address with var space end
|
| 3677 |
|
|
BEQ LAB_1D8B ; if not found go make new var
|
| 3678 |
|
|
|
| 3679 |
|
|
LAB_1D69
|
| 3680 |
|
|
LDA Varnm1 ; get 1st character of var to find
|
| 3681 |
|
|
CMP (Vrschl),Y ; compare with variable name 1st character
|
| 3682 |
|
|
BNE LAB_1D77 ; branch if no match
|
| 3683 |
|
|
|
| 3684 |
|
|
; 1st characters match so compare 2nd characters
|
| 3685 |
|
|
LDA Varnm2 ; get 2nd character of var to find
|
| 3686 |
|
|
INY ; index to point to variable name 2nd character
|
| 3687 |
|
|
CMP (Vrschl),Y ; compare with variable name 2nd character
|
| 3688 |
|
|
BEQ LAB_1DD7 ; branch if match (found var)
|
| 3689 |
|
|
|
| 3690 |
|
|
DEY ; else decrement index (now = $00)
|
| 3691 |
|
|
LAB_1D77
|
| 3692 |
|
|
CLC ; clear carry for add
|
| 3693 |
|
|
LDA Vrschl ; get search address low byte
|
| 3694 |
|
|
ADC #$06 ; +6 (offset to next var name)
|
| 3695 |
|
|
BCC LAB_1D5F ; loop if no overflow to high byte
|
| 3696 |
|
|
|
| 3697 |
|
|
INX ; else increment high byte
|
| 3698 |
|
|
BNE LAB_1D5D ; loop always (RAM doesn't extend to $FFFF !)
|
| 3699 |
|
|
|
| 3700 |
|
|
; check byte, return C=0 if<"A" or >"Z" or "a" to "z"
|
| 3701 |
|
|
|
| 3702 |
|
|
LAB_CASC
|
| 3703 |
|
|
CMP #'a' ; compare with "a"
|
| 3704 |
|
|
BCS LAB_1D83 ; go check <"z"+1
|
| 3705 |
|
|
|
| 3706 |
|
|
; check byte, return C=0 if<"A" or >"Z"
|
| 3707 |
|
|
|
| 3708 |
|
|
LAB_1D82
|
| 3709 |
|
|
CMP #'A' ; compare with "A"
|
| 3710 |
|
|
BCC LAB_1D8A ; exit if less
|
| 3711 |
|
|
|
| 3712 |
|
|
; carry is set
|
| 3713 |
|
|
SBC #$5B ; subtract "Z"+1
|
| 3714 |
|
|
SEC ; set carry
|
| 3715 |
|
|
SBC #$A5 ; subtract $A5 (restore byte)
|
| 3716 |
|
|
; carry clear if byte>$5A
|
| 3717 |
|
|
LAB_1D8A
|
| 3718 |
|
|
RTS
|
| 3719 |
|
|
|
| 3720 |
|
|
LAB_1D83
|
| 3721 |
|
|
SBC #$7B ; subtract "z"+1
|
| 3722 |
|
|
SEC ; set carry
|
| 3723 |
|
|
SBC #$85 ; subtract $85 (restore byte)
|
| 3724 |
|
|
; carry clear if byte>$7A
|
| 3725 |
|
|
RTS
|
| 3726 |
|
|
|
| 3727 |
|
|
; reached end of variable mem without match
|
| 3728 |
|
|
; .. so create new variable
|
| 3729 |
|
|
LAB_1D8B
|
| 3730 |
|
|
PLA ; pop return address low byte
|
| 3731 |
|
|
PHA ; push return address low byte
|
| 3732 |
|
|
LAB_1C18p2 = LAB_1C18+2
|
| 3733 |
|
|
CMP #
|
| 3734 |
|
|
BNE LAB_1D98 ; if not get (var) go create new var
|
| 3735 |
|
|
|
| 3736 |
|
|
; This will only drop through if the call was from LAB_1C18 and is only called
|
| 3737 |
|
|
; from there if it is searching for a variable from the RHS of a LET a=b statement
|
| 3738 |
|
|
; it prevents the creation of variables not assigned a value.
|
| 3739 |
|
|
|
| 3740 |
|
|
; value returned by this is either numeric zero (exponent byte is $00) or null string
|
| 3741 |
|
|
; (descriptor length byte is $00). in fact a pointer to any $00 byte would have done.
|
| 3742 |
|
|
|
| 3743 |
|
|
; doing this saves 6 bytes of variable memory and 168 machine cycles of time
|
| 3744 |
|
|
|
| 3745 |
|
|
; this is where you would put the undefined variable error call e.g.
|
| 3746 |
|
|
|
| 3747 |
|
|
; ; variable doesn't exist so flag error
|
| 3748 |
|
|
; LDX #$24 ; error code $24 ("undefined variable" error)
|
| 3749 |
|
|
; JMP LAB_XERR ; do error #X then warm start
|
| 3750 |
|
|
|
| 3751 |
|
|
; the above code has been tested and works a treat! (it replaces the three code lines
|
| 3752 |
|
|
; below)
|
| 3753 |
|
|
|
| 3754 |
|
|
; else return dummy null value
|
| 3755 |
|
|
LDA #
|
| 3756 |
|
|
; (uses part of misc constants table)
|
| 3757 |
|
|
LDY #>LAB_1D96 ; high byte point to $00,$00
|
| 3758 |
|
|
RTS
|
| 3759 |
|
|
|
| 3760 |
|
|
; create new numeric variable
|
| 3761 |
|
|
LAB_1D98
|
| 3762 |
|
|
LDA Sarryl ; get var mem end low byte
|
| 3763 |
|
|
LDY Sarryh ; get var mem end high byte
|
| 3764 |
|
|
STA Ostrtl ; save old block start low byte
|
| 3765 |
|
|
STY Ostrth ; save old block start high byte
|
| 3766 |
|
|
LDA Earryl ; get array mem end low byte
|
| 3767 |
|
|
LDY Earryh ; get array mem end high byte
|
| 3768 |
|
|
STA Obendl ; save old block end low byte
|
| 3769 |
|
|
STY Obendh ; save old block end high byte
|
| 3770 |
|
|
CLC ; clear carry for add
|
| 3771 |
|
|
ADC #$06 ; +6 (space for one var)
|
| 3772 |
|
|
BCC LAB_1DAE ; branch if no overflow to high byte
|
| 3773 |
|
|
|
| 3774 |
|
|
INY ; else increment high byte
|
| 3775 |
|
|
LAB_1DAE
|
| 3776 |
|
|
STA Nbendl ; set new block end low byte
|
| 3777 |
|
|
STY Nbendh ; set new block end high byte
|
| 3778 |
|
|
JSR LAB_11CF ; open up space in memory
|
| 3779 |
|
|
LDA Nbendl ; get new start low byte
|
| 3780 |
|
|
LDY Nbendh ; get new start high byte (-$100)
|
| 3781 |
|
|
INY ; correct high byte
|
| 3782 |
|
|
STA Sarryl ; save new var mem end low byte
|
| 3783 |
|
|
STY Sarryh ; save new var mem end high byte
|
| 3784 |
|
|
LDY #$00 ; clear index
|
| 3785 |
|
|
LDA Varnm1 ; get var name 1st character
|
| 3786 |
|
|
STA (Vrschl),Y ; save var name 1st character
|
| 3787 |
|
|
INY ; increment index
|
| 3788 |
|
|
LDA Varnm2 ; get var name 2nd character
|
| 3789 |
|
|
STA (Vrschl),Y ; save var name 2nd character
|
| 3790 |
|
|
LDA #$00 ; clear A
|
| 3791 |
|
|
INY ; increment index
|
| 3792 |
|
|
STA (Vrschl),Y ; initialise var byte
|
| 3793 |
|
|
INY ; increment index
|
| 3794 |
|
|
STA (Vrschl),Y ; initialise var byte
|
| 3795 |
|
|
INY ; increment index
|
| 3796 |
|
|
STA (Vrschl),Y ; initialise var byte
|
| 3797 |
|
|
INY ; increment index
|
| 3798 |
|
|
STA (Vrschl),Y ; initialise var byte
|
| 3799 |
|
|
|
| 3800 |
|
|
; found a match for var ((Vrschl) = ptr)
|
| 3801 |
|
|
LAB_1DD7
|
| 3802 |
|
|
LDA Vrschl ; get var address low byte
|
| 3803 |
|
|
CLC ; clear carry for add
|
| 3804 |
|
|
ADC #$02 ; +2 (offset past var name bytes)
|
| 3805 |
|
|
LDY Vrschh ; get var address high byte
|
| 3806 |
|
|
BCC LAB_1DE1 ; branch if no overflow from add
|
| 3807 |
|
|
|
| 3808 |
|
|
INY ; else increment high byte
|
| 3809 |
|
|
LAB_1DE1
|
| 3810 |
|
|
STA Cvaral ; save current var address low byte
|
| 3811 |
|
|
STY Cvarah ; save current var address high byte
|
| 3812 |
|
|
RTS
|
| 3813 |
|
|
|
| 3814 |
|
|
; set-up array pointer (Adatal/h) to first element in array
|
| 3815 |
|
|
; set Adatal,Adatah to Astrtl,Astrth+2*Dimcnt+#$05
|
| 3816 |
|
|
|
| 3817 |
|
|
LAB_1DE6
|
| 3818 |
|
|
LDA Dimcnt ; get # of dimensions (1, 2 or 3)
|
| 3819 |
|
|
ASL ; *2 (also clears the carry !)
|
| 3820 |
|
|
ADC #$05 ; +5 (result is 7, 9 or 11 here)
|
| 3821 |
|
|
ADC Astrtl ; add array start pointer low byte
|
| 3822 |
|
|
LDY Astrth ; get array pointer high byte
|
| 3823 |
|
|
BCC LAB_1DF2 ; branch if no overflow
|
| 3824 |
|
|
|
| 3825 |
|
|
INY ; else increment high byte
|
| 3826 |
|
|
LAB_1DF2
|
| 3827 |
|
|
STA Adatal ; save array data pointer low byte
|
| 3828 |
|
|
STY Adatah ; save array data pointer high byte
|
| 3829 |
|
|
RTS
|
| 3830 |
|
|
|
| 3831 |
|
|
; evaluate integer expression
|
| 3832 |
|
|
|
| 3833 |
|
|
LAB_EVIN
|
| 3834 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 3835 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 3836 |
|
|
; else do type mismatch
|
| 3837 |
|
|
|
| 3838 |
|
|
; evaluate integer expression (no check)
|
| 3839 |
|
|
|
| 3840 |
|
|
LAB_EVPI
|
| 3841 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 3842 |
|
|
BMI LAB_1E12 ; do function call error if -ve
|
| 3843 |
|
|
|
| 3844 |
|
|
; evaluate integer expression (no sign check)
|
| 3845 |
|
|
|
| 3846 |
|
|
LAB_EVIR
|
| 3847 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 3848 |
|
|
CMP #$90 ; compare with exponent = 2^16 (n>2^15)
|
| 3849 |
|
|
BCC LAB_1E14 ; branch if n<2^16 (is ok)
|
| 3850 |
|
|
|
| 3851 |
|
|
LDA #
|
| 3852 |
|
|
LDY #>LAB_1DF7 ; set pointer high byte to -32768
|
| 3853 |
|
|
JSR LAB_27F8 ; compare FAC1 with (AY)
|
| 3854 |
|
|
LAB_1E12
|
| 3855 |
|
|
BNE LAB_FCER ; if <> do function call error then warm start
|
| 3856 |
|
|
|
| 3857 |
|
|
LAB_1E14
|
| 3858 |
|
|
JMP LAB_2831 ; convert FAC1 floating-to-fixed and return
|
| 3859 |
|
|
|
| 3860 |
|
|
; find or make array
|
| 3861 |
|
|
|
| 3862 |
|
|
LAB_1E17
|
| 3863 |
|
|
LDA Defdim ; get DIM flag
|
| 3864 |
|
|
PHA ; push it
|
| 3865 |
|
|
LDA Dtypef ; get data type flag, $FF=string, $00=numeric
|
| 3866 |
|
|
PHA ; push it
|
| 3867 |
|
|
LDY #$00 ; clear dimensions count
|
| 3868 |
|
|
|
| 3869 |
|
|
; now get the array dimension(s) and stack it (them) before the data type and DIM flag
|
| 3870 |
|
|
|
| 3871 |
|
|
LAB_1E1F
|
| 3872 |
|
|
TYA ; copy dimensions count
|
| 3873 |
|
|
PHA ; save it
|
| 3874 |
|
|
LDA Varnm2 ; get array name 2nd byte
|
| 3875 |
|
|
PHA ; save it
|
| 3876 |
|
|
LDA Varnm1 ; get array name 1st byte
|
| 3877 |
|
|
PHA ; save it
|
| 3878 |
|
|
JSR LAB_EVIN ; evaluate integer expression
|
| 3879 |
|
|
PLA ; pull array name 1st byte
|
| 3880 |
|
|
STA Varnm1 ; restore array name 1st byte
|
| 3881 |
|
|
PLA ; pull array name 2nd byte
|
| 3882 |
|
|
STA Varnm2 ; restore array name 2nd byte
|
| 3883 |
|
|
PLA ; pull dimensions count
|
| 3884 |
|
|
TAY ; restore it
|
| 3885 |
|
|
TSX ; copy stack pointer
|
| 3886 |
|
|
LDA LAB_STAK+2,X ; get DIM flag
|
| 3887 |
|
|
PHA ; push it
|
| 3888 |
|
|
LDA LAB_STAK+1,X ; get data type flag
|
| 3889 |
|
|
PHA ; push it
|
| 3890 |
|
|
LDA FAC1_2 ; get this dimension size high byte
|
| 3891 |
|
|
STA LAB_STAK+2,X ; stack before flag bytes
|
| 3892 |
|
|
LDA FAC1_3 ; get this dimension size low byte
|
| 3893 |
|
|
STA LAB_STAK+1,X ; stack before flag bytes
|
| 3894 |
|
|
INY ; increment dimensions count
|
| 3895 |
|
|
JSR LAB_GBYT ; scan memory
|
| 3896 |
|
|
CMP #',' ; compare with ","
|
| 3897 |
|
|
BEQ LAB_1E1F ; if found go do next dimension
|
| 3898 |
|
|
|
| 3899 |
|
|
STY Dimcnt ; store dimensions count
|
| 3900 |
|
|
JSR LAB_1BFB ; scan for ")" , else do syntax error then warm start
|
| 3901 |
|
|
PLA ; pull data type flag
|
| 3902 |
|
|
STA Dtypef ; restore data type flag, $FF=string, $00=numeric
|
| 3903 |
|
|
PLA ; pull DIM flag
|
| 3904 |
|
|
STA Defdim ; restore DIM flag
|
| 3905 |
|
|
LDX Sarryl ; get array mem start low byte
|
| 3906 |
|
|
LDA Sarryh ; get array mem start high byte
|
| 3907 |
|
|
|
| 3908 |
|
|
; now check to see if we are at the end of array memory (we would be if there were
|
| 3909 |
|
|
; no arrays).
|
| 3910 |
|
|
|
| 3911 |
|
|
LAB_1E5C
|
| 3912 |
|
|
STX Astrtl ; save as array start pointer low byte
|
| 3913 |
|
|
STA Astrth ; save as array start pointer high byte
|
| 3914 |
|
|
CMP Earryh ; compare with array mem end high byte
|
| 3915 |
|
|
BNE LAB_1E68 ; branch if not reached array mem end
|
| 3916 |
|
|
|
| 3917 |
|
|
CPX Earryl ; else compare with array mem end low byte
|
| 3918 |
|
|
BEQ LAB_1EA1 ; go build array if not found
|
| 3919 |
|
|
|
| 3920 |
|
|
; search for array
|
| 3921 |
|
|
LAB_1E68
|
| 3922 |
|
|
LDY #$00 ; clear index
|
| 3923 |
|
|
LDA (Astrtl),Y ; get array name first byte
|
| 3924 |
|
|
INY ; increment index to second name byte
|
| 3925 |
|
|
CMP Varnm1 ; compare with this array name first byte
|
| 3926 |
|
|
BNE LAB_1E77 ; branch if no match
|
| 3927 |
|
|
|
| 3928 |
|
|
LDA Varnm2 ; else get this array name second byte
|
| 3929 |
|
|
CMP (Astrtl),Y ; compare with array name second byte
|
| 3930 |
|
|
BEQ LAB_1E8D ; array found so branch
|
| 3931 |
|
|
|
| 3932 |
|
|
; no match
|
| 3933 |
|
|
LAB_1E77
|
| 3934 |
|
|
INY ; increment index
|
| 3935 |
|
|
LDA (Astrtl),Y ; get array size low byte
|
| 3936 |
|
|
CLC ; clear carry for add
|
| 3937 |
|
|
ADC Astrtl ; add array start pointer low byte
|
| 3938 |
|
|
TAX ; copy low byte to X
|
| 3939 |
|
|
INY ; increment index
|
| 3940 |
|
|
LDA (Astrtl),Y ; get array size high byte
|
| 3941 |
|
|
ADC Astrth ; add array mem pointer high byte
|
| 3942 |
|
|
BCC LAB_1E5C ; if no overflow go check next array
|
| 3943 |
|
|
|
| 3944 |
|
|
; do array bounds error
|
| 3945 |
|
|
|
| 3946 |
|
|
LAB_1E85
|
| 3947 |
|
|
LDX #$10 ; error code $10 ("Array bounds" error)
|
| 3948 |
|
|
.byte $2C ; makes next bit BIT LAB_08A2
|
| 3949 |
|
|
|
| 3950 |
|
|
; do function call error
|
| 3951 |
|
|
|
| 3952 |
|
|
LAB_FCER
|
| 3953 |
|
|
LDX #$08 ; error code $08 ("Function call" error)
|
| 3954 |
|
|
LAB_1E8A
|
| 3955 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 3956 |
|
|
|
| 3957 |
|
|
; found array, are we trying to dimension it?
|
| 3958 |
|
|
LAB_1E8D
|
| 3959 |
|
|
LDX #$12 ; set error $12 ("Double dimension" error)
|
| 3960 |
|
|
LDA Defdim ; get DIM flag
|
| 3961 |
|
|
BNE LAB_1E8A ; if we are trying to dimension it do error #X, then warm
|
| 3962 |
|
|
; start
|
| 3963 |
|
|
|
| 3964 |
|
|
; found the array and we're not dimensioning it so we must find an element in it
|
| 3965 |
|
|
|
| 3966 |
|
|
JSR LAB_1DE6 ; set-up array pointer (Adatal/h) to first element in array
|
| 3967 |
|
|
; (Astrtl,Astrth points to start of array)
|
| 3968 |
|
|
LDA Dimcnt ; get dimensions count
|
| 3969 |
|
|
LDY #$04 ; set index to array's # of dimensions
|
| 3970 |
|
|
CMP (Astrtl),Y ; compare with no of dimensions
|
| 3971 |
|
|
BNE LAB_1E85 ; if wrong do array bounds error, could do "Wrong
|
| 3972 |
|
|
; dimensions" error here .. if we want a different
|
| 3973 |
|
|
; error message
|
| 3974 |
|
|
|
| 3975 |
|
|
JMP LAB_1F28 ; found array so go get element
|
| 3976 |
|
|
; (could jump to LAB_1F28 as all LAB_1F24 does is take
|
| 3977 |
|
|
; Dimcnt and save it at (Astrtl),Y which is already the
|
| 3978 |
|
|
; same or we would have taken the BNE)
|
| 3979 |
|
|
|
| 3980 |
|
|
; array not found, so build it
|
| 3981 |
|
|
LAB_1EA1
|
| 3982 |
|
|
JSR LAB_1DE6 ; set-up array pointer (Adatal/h) to first element in array
|
| 3983 |
|
|
; (Astrtl,Astrth points to start of array)
|
| 3984 |
|
|
JSR LAB_121F ; check available memory, "Out of memory" error if no room
|
| 3985 |
|
|
; addr to check is in AY (low/high)
|
| 3986 |
|
|
LDY #$00 ; clear Y (don't need to clear A)
|
| 3987 |
|
|
STY Aspth ; clear array data size high byte
|
| 3988 |
|
|
LDA Varnm1 ; get variable name 1st byte
|
| 3989 |
|
|
STA (Astrtl),Y ; save array name 1st byte
|
| 3990 |
|
|
INY ; increment index
|
| 3991 |
|
|
LDA Varnm2 ; get variable name 2nd byte
|
| 3992 |
|
|
STA (Astrtl),Y ; save array name 2nd byte
|
| 3993 |
|
|
LDA Dimcnt ; get dimensions count
|
| 3994 |
|
|
LDY #$04 ; index to dimension count
|
| 3995 |
|
|
STY Asptl ; set array data size low byte (four bytes per element)
|
| 3996 |
|
|
STA (Astrtl),Y ; set array's dimensions count
|
| 3997 |
|
|
|
| 3998 |
|
|
; now calculate the size of the data space for the array
|
| 3999 |
|
|
CLC ; clear carry for add (clear on subsequent loops)
|
| 4000 |
|
|
LAB_1EC0
|
| 4001 |
|
|
LDX #$0B ; set default dimension value low byte
|
| 4002 |
|
|
LDA #$00 ; set default dimension value high byte
|
| 4003 |
|
|
BIT Defdim ; test default DIM flag
|
| 4004 |
|
|
BVC LAB_1ED0 ; branch if b6 of Defdim is clear
|
| 4005 |
|
|
|
| 4006 |
|
|
PLA ; else pull dimension value low byte
|
| 4007 |
|
|
ADC #$01 ; +1 (allow for zeroeth element)
|
| 4008 |
|
|
TAX ; copy low byte to X
|
| 4009 |
|
|
PLA ; pull dimension value high byte
|
| 4010 |
|
|
ADC #$00 ; add carry from low byte
|
| 4011 |
|
|
|
| 4012 |
|
|
LAB_1ED0
|
| 4013 |
|
|
INY ; index to dimension value high byte
|
| 4014 |
|
|
STA (Astrtl),Y ; save dimension value high byte
|
| 4015 |
|
|
INY ; index to dimension value high byte
|
| 4016 |
|
|
TXA ; get dimension value low byte
|
| 4017 |
|
|
STA (Astrtl),Y ; save dimension value low byte
|
| 4018 |
|
|
JSR LAB_1F7C ; does XY = (Astrtl),Y * (Asptl)
|
| 4019 |
|
|
STX Asptl ; save array data size low byte
|
| 4020 |
|
|
STA Aspth ; save array data size high byte
|
| 4021 |
|
|
LDY ut1_pl ; restore index (saved by subroutine)
|
| 4022 |
|
|
DEC Dimcnt ; decrement dimensions count
|
| 4023 |
|
|
BNE LAB_1EC0 ; loop while not = 0
|
| 4024 |
|
|
|
| 4025 |
|
|
ADC Adatah ; add size high byte to first element high byte
|
| 4026 |
|
|
; (carry is always clear here)
|
| 4027 |
|
|
BCS LAB_1F45 ; if overflow go do "Out of memory" error
|
| 4028 |
|
|
|
| 4029 |
|
|
STA Adatah ; save end of array high byte
|
| 4030 |
|
|
TAY ; copy end high byte to Y
|
| 4031 |
|
|
TXA ; get array size low byte
|
| 4032 |
|
|
ADC Adatal ; add array start low byte
|
| 4033 |
|
|
BCC LAB_1EF3 ; branch if no carry
|
| 4034 |
|
|
|
| 4035 |
|
|
INY ; else increment end of array high byte
|
| 4036 |
|
|
BEQ LAB_1F45 ; if overflow go do "Out of memory" error
|
| 4037 |
|
|
|
| 4038 |
|
|
; set-up mostly complete, now zero the array
|
| 4039 |
|
|
LAB_1EF3
|
| 4040 |
|
|
JSR LAB_121F ; check available memory, "Out of memory" error if no room
|
| 4041 |
|
|
; addr to check is in AY (low/high)
|
| 4042 |
|
|
STA Earryl ; save array mem end low byte
|
| 4043 |
|
|
STY Earryh ; save array mem end high byte
|
| 4044 |
|
|
LDA #$00 ; clear byte for array clear
|
| 4045 |
|
|
INC Aspth ; increment array size high byte (now block count)
|
| 4046 |
|
|
LDY Asptl ; get array size low byte (now index to block)
|
| 4047 |
|
|
BEQ LAB_1F07 ; branch if low byte = $00
|
| 4048 |
|
|
message "LAB_1F02"
|
| 4049 |
|
|
LAB_1F02
|
| 4050 |
|
|
DEY ; decrement index (do 0 to n-1)
|
| 4051 |
|
|
STA (Adatal),Y ; zero byte
|
| 4052 |
|
|
BNE LAB_1F02 ; loop until this block done
|
| 4053 |
|
|
|
| 4054 |
|
|
LAB_1F07
|
| 4055 |
|
|
DEC Adatah ; decrement array pointer high byte
|
| 4056 |
|
|
DEC Aspth ; decrement block count high byte
|
| 4057 |
|
|
BNE LAB_1F02 ; loop until all blocks done
|
| 4058 |
|
|
|
| 4059 |
|
|
INC Adatah ; correct for last loop
|
| 4060 |
|
|
SEC ; set carry for subtract
|
| 4061 |
|
|
LDY #$02 ; index to array size low byte
|
| 4062 |
|
|
LDA Earryl ; get array mem end low byte
|
| 4063 |
|
|
SBC Astrtl ; subtract array start low byte
|
| 4064 |
|
|
STA (Astrtl),Y ; save array size low byte
|
| 4065 |
|
|
INY ; index to array size high byte
|
| 4066 |
|
|
LDA Earryh ; get array mem end high byte
|
| 4067 |
|
|
SBC Astrth ; subtract array start high byte
|
| 4068 |
|
|
STA (Astrtl),Y ; save array size high byte
|
| 4069 |
|
|
LDA Defdim ; get default DIM flag
|
| 4070 |
|
|
BNE LAB_1F7B ; exit (RET) if this was a DIM command
|
| 4071 |
|
|
|
| 4072 |
|
|
; else, find element
|
| 4073 |
|
|
INY ; index to # of dimensions
|
| 4074 |
|
|
|
| 4075 |
|
|
LAB_1F24
|
| 4076 |
|
|
LDA (Astrtl),Y ; get array's dimension count
|
| 4077 |
|
|
STA Dimcnt ; save it
|
| 4078 |
|
|
|
| 4079 |
|
|
; we have found, or built, the array. now we need to find the element
|
| 4080 |
|
|
|
| 4081 |
|
|
LAB_1F28
|
| 4082 |
|
|
LDA #$00 ; clear byte
|
| 4083 |
|
|
STA Asptl ; clear array data pointer low byte
|
| 4084 |
|
|
LAB_1F2C
|
| 4085 |
|
|
STA Aspth ; save array data pointer high byte
|
| 4086 |
|
|
INY ; increment index (point to array bound high byte)
|
| 4087 |
|
|
PLA ; pull array index low byte
|
| 4088 |
|
|
TAX ; copy to X
|
| 4089 |
|
|
STA FAC1_2 ; save index low byte to FAC1 mantissa2
|
| 4090 |
|
|
PLA ; pull array index high byte
|
| 4091 |
|
|
STA FAC1_3 ; save index high byte to FAC1 mantissa3
|
| 4092 |
|
|
CMP (Astrtl),Y ; compare with array bound high byte
|
| 4093 |
|
|
BCC LAB_1F48 ; branch if within bounds
|
| 4094 |
|
|
|
| 4095 |
|
|
BNE LAB_1F42 ; if outside bounds do array bounds error
|
| 4096 |
|
|
|
| 4097 |
|
|
; else high byte was = so test low bytes
|
| 4098 |
|
|
INY ; index to array bound low byte
|
| 4099 |
|
|
TXA ; get array index low byte
|
| 4100 |
|
|
CMP (Astrtl),Y ; compare with array bound low byte
|
| 4101 |
|
|
BCC LAB_1F49 ; branch if within bounds
|
| 4102 |
|
|
|
| 4103 |
|
|
LAB_1F42
|
| 4104 |
|
|
JMP LAB_1E85 ; else do array bounds error
|
| 4105 |
|
|
|
| 4106 |
|
|
LAB_1F45
|
| 4107 |
|
|
JMP LAB_OMER ; do "Out of memory" error then warm start
|
| 4108 |
|
|
|
| 4109 |
|
|
LAB_1F48
|
| 4110 |
|
|
INY ; index to array bound low byte
|
| 4111 |
|
|
LAB_1F49
|
| 4112 |
|
|
LDA Aspth ; get array data pointer high byte
|
| 4113 |
|
|
ORA Asptl ; OR with array data pointer low byte
|
| 4114 |
|
|
BEQ LAB_1F5A ; branch if array data pointer = null (skip multiply)
|
| 4115 |
|
|
|
| 4116 |
|
|
JSR LAB_1F7C ; does XY = (Astrtl),Y * (Asptl)
|
| 4117 |
|
|
TXA ; get result low byte
|
| 4118 |
|
|
ADC FAC1_2 ; add index low byte from FAC1 mantissa2
|
| 4119 |
|
|
TAX ; save result low byte
|
| 4120 |
|
|
TYA ; get result high byte
|
| 4121 |
|
|
LDY ut1_pl ; restore index
|
| 4122 |
|
|
LAB_1F5A
|
| 4123 |
|
|
ADC FAC1_3 ; add index high byte from FAC1 mantissa3
|
| 4124 |
|
|
STX Asptl ; save array data pointer low byte
|
| 4125 |
|
|
DEC Dimcnt ; decrement dimensions count
|
| 4126 |
|
|
BNE LAB_1F2C ; loop if dimensions still to do
|
| 4127 |
|
|
|
| 4128 |
|
|
ASL Asptl ; array data pointer low byte * 2
|
| 4129 |
|
|
ROL ; array data pointer high byte * 2
|
| 4130 |
|
|
ASL Asptl ; array data pointer low byte * 4
|
| 4131 |
|
|
ROL ; array data pointer high byte * 4
|
| 4132 |
|
|
TAY ; copy high byte
|
| 4133 |
|
|
LDA Asptl ; get low byte
|
| 4134 |
|
|
ADC Adatal ; add array data start pointer low byte
|
| 4135 |
|
|
STA Cvaral ; save as current var address low byte
|
| 4136 |
|
|
TYA ; get high byte back
|
| 4137 |
|
|
ADC Adatah ; add array data start pointer high byte
|
| 4138 |
|
|
STA Cvarah ; save as current var address high byte
|
| 4139 |
|
|
TAY ; copy high byte to Y
|
| 4140 |
|
|
LDA Cvaral ; get current var address low byte
|
| 4141 |
|
|
LAB_1F7B
|
| 4142 |
|
|
RTS
|
| 4143 |
|
|
|
| 4144 |
|
|
; does XY = (Astrtl),Y * (Asptl)
|
| 4145 |
|
|
|
| 4146 |
|
|
LAB_1F7C
|
| 4147 |
|
|
STY ut1_pl ; save index
|
| 4148 |
|
|
LDA (Astrtl),Y ; get dimension size low byte
|
| 4149 |
|
|
STA dims_l ; save dimension size low byte
|
| 4150 |
|
|
DEY ; decrement index
|
| 4151 |
|
|
LDA (Astrtl),Y ; get dimension size high byte
|
| 4152 |
|
|
STA dims_h ; save dimension size high byte
|
| 4153 |
|
|
|
| 4154 |
|
|
LDA #$10 ; count = $10 (16 bit multiply)
|
| 4155 |
|
|
STA numbit ; save bit count
|
| 4156 |
|
|
LDX #$00 ; clear result low byte
|
| 4157 |
|
|
LDY #$00 ; clear result high byte
|
| 4158 |
|
|
LAB_1F8F
|
| 4159 |
|
|
TXA ; get result low byte
|
| 4160 |
|
|
ASL ; *2
|
| 4161 |
|
|
TAX ; save result low byte
|
| 4162 |
|
|
TYA ; get result high byte
|
| 4163 |
|
|
ROL ; *2
|
| 4164 |
|
|
TAY ; save result high byte
|
| 4165 |
|
|
BCS LAB_1F45 ; if overflow go do "Out of memory" error
|
| 4166 |
|
|
|
| 4167 |
|
|
ASL Asptl ; shift multiplier low byte
|
| 4168 |
|
|
ROL Aspth ; shift multiplier high byte
|
| 4169 |
|
|
BCC LAB_1FA8 ; skip add if no carry
|
| 4170 |
|
|
|
| 4171 |
|
|
CLC ; else clear carry for add
|
| 4172 |
|
|
TXA ; get result low byte
|
| 4173 |
|
|
ADC dims_l ; add dimension size low byte
|
| 4174 |
|
|
TAX ; save result low byte
|
| 4175 |
|
|
TYA ; get result high byte
|
| 4176 |
|
|
ADC dims_h ; add dimension size high byte
|
| 4177 |
|
|
TAY ; save result high byte
|
| 4178 |
|
|
BCS LAB_1F45 ; if overflow go do "Out of memory" error
|
| 4179 |
|
|
|
| 4180 |
|
|
LAB_1FA8
|
| 4181 |
|
|
DEC numbit ; decrement bit count
|
| 4182 |
|
|
BNE LAB_1F8F ; loop until all done
|
| 4183 |
|
|
|
| 4184 |
|
|
RTS
|
| 4185 |
|
|
|
| 4186 |
|
|
; perform FRE()
|
| 4187 |
|
|
|
| 4188 |
|
|
LAB_FRE
|
| 4189 |
|
|
LDA Dtypef ; get data type flag, $FF=string, $00=numeric
|
| 4190 |
|
|
BPL LAB_1FB4 ; branch if numeric
|
| 4191 |
|
|
|
| 4192 |
|
|
JSR LAB_22B6 ; pop string off descriptor stack, or from top of string
|
| 4193 |
|
|
; space returns with A = length, X=$71=pointer low byte,
|
| 4194 |
|
|
; Y=$72=pointer high byte
|
| 4195 |
|
|
|
| 4196 |
|
|
; FRE(n) was numeric so do this
|
| 4197 |
|
|
LAB_1FB4
|
| 4198 |
|
|
JSR LAB_GARB ; go do garbage collection
|
| 4199 |
|
|
SEC ; set carry for subtract
|
| 4200 |
|
|
LDA Sstorl ; get bottom of string space low byte
|
| 4201 |
|
|
SBC Earryl ; subtract array mem end low byte
|
| 4202 |
|
|
TAY ; copy result to Y
|
| 4203 |
|
|
LDA Sstorh ; get bottom of string space high byte
|
| 4204 |
|
|
SBC Earryh ; subtract array mem end high byte
|
| 4205 |
|
|
|
| 4206 |
|
|
; save and convert integer AY to FAC1
|
| 4207 |
|
|
|
| 4208 |
|
|
LAB_AYFC
|
| 4209 |
|
|
LSR Dtypef ; clear data type flag, $FF=string, $00=numeric
|
| 4210 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 4211 |
|
|
STY FAC1_2 ; save FAC1 mantissa2
|
| 4212 |
|
|
LDX #$90 ; set exponent=2^16 (integer)
|
| 4213 |
|
|
JMP LAB_27E3 ; set exp=X, clear FAC1_3, normalise and return
|
| 4214 |
|
|
|
| 4215 |
|
|
; perform POS()
|
| 4216 |
|
|
|
| 4217 |
|
|
LAB_POS
|
| 4218 |
|
|
LDY TPos ; get terminal position
|
| 4219 |
|
|
|
| 4220 |
|
|
; convert Y to byte in FAC1
|
| 4221 |
|
|
|
| 4222 |
|
|
LAB_1FD0
|
| 4223 |
|
|
LDA #$00 ; clear high byte
|
| 4224 |
|
|
BEQ LAB_AYFC ; always save and convert integer AY to FAC1 and return
|
| 4225 |
|
|
|
| 4226 |
|
|
; check not Direct (used by DEF and INPUT)
|
| 4227 |
|
|
|
| 4228 |
|
|
LAB_CKRN
|
| 4229 |
|
|
LDX Clineh ; get current line high byte
|
| 4230 |
|
|
INX ; increment it
|
| 4231 |
|
|
BNE LAB_1F7B ; return if can continue not direct mode
|
| 4232 |
|
|
|
| 4233 |
|
|
; else do illegal direct error
|
| 4234 |
|
|
LAB_1FD9
|
| 4235 |
|
|
LDX #$16 ; error code $16 ("Illegal direct" error)
|
| 4236 |
|
|
LAB_1FDB
|
| 4237 |
|
|
JMP LAB_XERR ; go do error #X, then warm start
|
| 4238 |
|
|
|
| 4239 |
|
|
; perform DEF
|
| 4240 |
|
|
|
| 4241 |
|
|
LAB_DEF
|
| 4242 |
|
|
JSR LAB_200B ; check FNx syntax
|
| 4243 |
|
|
STA func_l ; save function pointer low byte
|
| 4244 |
|
|
STY func_h ; save function pointer high byte
|
| 4245 |
|
|
JSR LAB_CKRN ; check not Direct (back here if ok)
|
| 4246 |
|
|
JSR LAB_1BFE ; scan for "(" , else do syntax error then warm start
|
| 4247 |
|
|
LDA #$80 ; set flag for FNx
|
| 4248 |
|
|
STA Sufnxf ; save subscript/FNx flag
|
| 4249 |
|
|
JSR LAB_GVAR ; get (var) address
|
| 4250 |
|
|
JSR LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 4251 |
|
|
JSR LAB_1BFB ; scan for ")" , else do syntax error then warm start
|
| 4252 |
|
|
LDA #TK_EQUAL ; get = token
|
| 4253 |
|
|
JSR LAB_SCCA ; scan for CHR$(A), else do syntax error then warm start
|
| 4254 |
|
|
LDA Cvarah ; get current var address high byte
|
| 4255 |
|
|
PHA ; push it
|
| 4256 |
|
|
LDA Cvaral ; get current var address low byte
|
| 4257 |
|
|
PHA ; push it
|
| 4258 |
|
|
LDA Bpntrh ; get BASIC execute pointer high byte
|
| 4259 |
|
|
PHA ; push it
|
| 4260 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 4261 |
|
|
PHA ; push it
|
| 4262 |
|
|
JSR LAB_DATA ; go perform DATA
|
| 4263 |
|
|
JMP LAB_207A ; put execute pointer and variable pointer into function
|
| 4264 |
|
|
; and return
|
| 4265 |
|
|
|
| 4266 |
|
|
; check FNx syntax
|
| 4267 |
|
|
|
| 4268 |
|
|
LAB_200B
|
| 4269 |
|
|
LDA #TK_FN ; get FN" token
|
| 4270 |
|
|
JSR LAB_SCCA ; scan for CHR$(A) , else do syntax error then warm start
|
| 4271 |
|
|
; return character after A
|
| 4272 |
|
|
ORA #$80 ; set FN flag bit
|
| 4273 |
|
|
STA Sufnxf ; save FN flag so array variable test fails
|
| 4274 |
|
|
JSR LAB_1D12 ; search for FN variable
|
| 4275 |
|
|
JMP LAB_CTNM ; check if source is numeric and return, else do type
|
| 4276 |
|
|
; mismatch
|
| 4277 |
|
|
|
| 4278 |
|
|
; Evaluate FNx
|
| 4279 |
|
|
LAB_201E
|
| 4280 |
|
|
JSR LAB_200B ; check FNx syntax
|
| 4281 |
|
|
PHA ; push function pointer low byte
|
| 4282 |
|
|
TYA ; copy function pointer high byte
|
| 4283 |
|
|
PHA ; push function pointer high byte
|
| 4284 |
|
|
JSR LAB_1BFE ; scan for "(", else do syntax error then warm start
|
| 4285 |
|
|
JSR LAB_EVEX ; evaluate expression
|
| 4286 |
|
|
JSR LAB_1BFB ; scan for ")", else do syntax error then warm start
|
| 4287 |
|
|
JSR LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 4288 |
|
|
PLA ; pop function pointer high byte
|
| 4289 |
|
|
STA func_h ; restore it
|
| 4290 |
|
|
PLA ; pop function pointer low byte
|
| 4291 |
|
|
STA func_l ; restore it
|
| 4292 |
|
|
LDX #$20 ; error code $20 ("Undefined function" error)
|
| 4293 |
|
|
LDY #$03 ; index to variable pointer high byte
|
| 4294 |
|
|
LDA (func_l),Y ; get variable pointer high byte
|
| 4295 |
|
|
BEQ LAB_1FDB ; if zero go do undefined function error
|
| 4296 |
|
|
|
| 4297 |
|
|
STA Cvarah ; save variable address high byte
|
| 4298 |
|
|
DEY ; index to variable address low byte
|
| 4299 |
|
|
LDA (func_l),Y ; get variable address low byte
|
| 4300 |
|
|
STA Cvaral ; save variable address low byte
|
| 4301 |
|
|
TAX ; copy address low byte
|
| 4302 |
|
|
|
| 4303 |
|
|
; now stack the function variable value before use
|
| 4304 |
|
|
INY ; index to mantissa_3
|
| 4305 |
|
|
LAB_2043
|
| 4306 |
|
|
LDA (Cvaral),Y ; get byte from variable
|
| 4307 |
|
|
PHA ; stack it
|
| 4308 |
|
|
DEY ; decrement index
|
| 4309 |
|
|
BPL LAB_2043 ; loop until variable stacked
|
| 4310 |
|
|
|
| 4311 |
|
|
LDY Cvarah ; get variable address high byte
|
| 4312 |
|
|
JSR LAB_2778 ; pack FAC1 (function expression value) into (XY)
|
| 4313 |
|
|
; (function variable), return Y=0, always
|
| 4314 |
|
|
LDA Bpntrh ; get BASIC execute pointer high byte
|
| 4315 |
|
|
PHA ; push it
|
| 4316 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 4317 |
|
|
PHA ; push it
|
| 4318 |
|
|
LDA (func_l),Y ; get function execute pointer low byte
|
| 4319 |
|
|
STA Bpntrl ; save as BASIC execute pointer low byte
|
| 4320 |
|
|
INY ; index to high byte
|
| 4321 |
|
|
LDA (func_l),Y ; get function execute pointer high byte
|
| 4322 |
|
|
STA Bpntrh ; save as BASIC execute pointer high byte
|
| 4323 |
|
|
LDA Cvarah ; get variable address high byte
|
| 4324 |
|
|
PHA ; push it
|
| 4325 |
|
|
LDA Cvaral ; get variable address low byte
|
| 4326 |
|
|
PHA ; push it
|
| 4327 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 4328 |
|
|
; else do type mismatch
|
| 4329 |
|
|
PLA ; pull variable address low byte
|
| 4330 |
|
|
STA func_l ; save variable address low byte
|
| 4331 |
|
|
PLA ; pull variable address high byte
|
| 4332 |
|
|
STA func_h ; save variable address high byte
|
| 4333 |
|
|
JSR LAB_GBYT ; scan memory
|
| 4334 |
|
|
BEQ LAB_2074 ; branch if null (should be [EOL] marker)
|
| 4335 |
|
|
|
| 4336 |
|
|
JMP LAB_SNER ; else syntax error then warm start
|
| 4337 |
|
|
|
| 4338 |
|
|
; restore Bpntrl,Bpntrh and function variable from stack
|
| 4339 |
|
|
|
| 4340 |
|
|
LAB_2074
|
| 4341 |
|
|
PLA ; pull BASIC execute pointer low byte
|
| 4342 |
|
|
STA Bpntrl ; restore BASIC execute pointer low byte
|
| 4343 |
|
|
PLA ; pull BASIC execute pointer high byte
|
| 4344 |
|
|
STA Bpntrh ; restore BASIC execute pointer high byte
|
| 4345 |
|
|
|
| 4346 |
|
|
; put execute pointer and variable pointer into function
|
| 4347 |
|
|
|
| 4348 |
|
|
LAB_207A
|
| 4349 |
|
|
LDY #$00 ; clear index
|
| 4350 |
|
|
PLA ; pull BASIC execute pointer low byte
|
| 4351 |
|
|
STA (func_l),Y ; save to function
|
| 4352 |
|
|
INY ; increment index
|
| 4353 |
|
|
PLA ; pull BASIC execute pointer high byte
|
| 4354 |
|
|
STA (func_l),Y ; save to function
|
| 4355 |
|
|
INY ; increment index
|
| 4356 |
|
|
PLA ; pull current var address low byte
|
| 4357 |
|
|
STA (func_l),Y ; save to function
|
| 4358 |
|
|
INY ; increment index
|
| 4359 |
|
|
PLA ; pull current var address high byte
|
| 4360 |
|
|
STA (func_l),Y ; save to function
|
| 4361 |
|
|
RTS
|
| 4362 |
|
|
|
| 4363 |
|
|
; perform STR$()
|
| 4364 |
|
|
|
| 4365 |
|
|
LAB_STRS
|
| 4366 |
|
|
JSR LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 4367 |
|
|
JSR LAB_296E ; convert FAC1 to string
|
| 4368 |
|
|
LDA #
|
| 4369 |
|
|
LDY #>Decssp1 ; set result string high pointer
|
| 4370 |
|
|
BEQ LAB_20AE ; print null terminated string to Sutill/Sutilh
|
| 4371 |
|
|
|
| 4372 |
|
|
; Do string vector
|
| 4373 |
|
|
; copy des_pl/h to des_2l/h and make string space A bytes long
|
| 4374 |
|
|
|
| 4375 |
|
|
LAB_209C
|
| 4376 |
|
|
LDX des_pl ; get descriptor pointer low byte
|
| 4377 |
|
|
LDY des_ph ; get descriptor pointer high byte
|
| 4378 |
|
|
STX des_2l ; save descriptor pointer low byte
|
| 4379 |
|
|
STY des_2h ; save descriptor pointer high byte
|
| 4380 |
|
|
|
| 4381 |
|
|
; make string space A bytes long
|
| 4382 |
|
|
; A=length, X=Sutill=ptr low byte, Y=Sutilh=ptr high byte
|
| 4383 |
|
|
|
| 4384 |
|
|
LAB_MSSP
|
| 4385 |
|
|
JSR LAB_2115 ; make space in string memory for string A long
|
| 4386 |
|
|
; return X=Sutill=ptr low byte, Y=Sutilh=ptr high byte
|
| 4387 |
|
|
STX str_pl ; save string pointer low byte
|
| 4388 |
|
|
STY str_ph ; save string pointer high byte
|
| 4389 |
|
|
STA str_ln ; save length
|
| 4390 |
|
|
RTS
|
| 4391 |
|
|
|
| 4392 |
|
|
; Scan, set up string
|
| 4393 |
|
|
; print " terminated string to Sutill/Sutilh
|
| 4394 |
|
|
|
| 4395 |
|
|
LAB_20AE
|
| 4396 |
|
|
LDX #$22 ; set terminator to "
|
| 4397 |
|
|
STX Srchc ; set search character (terminator 1)
|
| 4398 |
|
|
STX Asrch ; set terminator 2
|
| 4399 |
|
|
|
| 4400 |
|
|
; print [Srchc] or [Asrch] terminated string to Sutill/Sutilh
|
| 4401 |
|
|
; source is AY
|
| 4402 |
|
|
|
| 4403 |
|
|
LAB_20B4
|
| 4404 |
|
|
STA ssptr_l ; store string start low byte
|
| 4405 |
|
|
STY ssptr_h ; store string start high byte
|
| 4406 |
|
|
STA str_pl ; save string pointer low byte
|
| 4407 |
|
|
STY str_ph ; save string pointer high byte
|
| 4408 |
|
|
LDY #$FF ; set length to -1
|
| 4409 |
|
|
LAB_20BE
|
| 4410 |
|
|
INY ; increment length
|
| 4411 |
|
|
LDA (ssptr_l),Y ; get byte from string
|
| 4412 |
|
|
BEQ LAB_20CF ; exit loop if null byte [EOS]
|
| 4413 |
|
|
|
| 4414 |
|
|
CMP Srchc ; compare with search character (terminator 1)
|
| 4415 |
|
|
BEQ LAB_20CB ; branch if terminator
|
| 4416 |
|
|
|
| 4417 |
|
|
CMP Asrch ; compare with terminator 2
|
| 4418 |
|
|
BNE LAB_20BE ; loop if not terminator 2
|
| 4419 |
|
|
|
| 4420 |
|
|
LAB_20CB
|
| 4421 |
|
|
CMP #$22 ; compare with "
|
| 4422 |
|
|
BEQ LAB_20D0 ; branch if " (carry set if = !)
|
| 4423 |
|
|
|
| 4424 |
|
|
LAB_20CF
|
| 4425 |
|
|
CLC ; clear carry for add (only if [EOL] terminated string)
|
| 4426 |
|
|
LAB_20D0
|
| 4427 |
|
|
STY str_ln ; save length in FAC1 exponent
|
| 4428 |
|
|
TYA ; copy length to A
|
| 4429 |
|
|
ADC ssptr_l ; add string start low byte
|
| 4430 |
|
|
STA Sendl ; save string end low byte
|
| 4431 |
|
|
LDX ssptr_h ; get string start high byte
|
| 4432 |
|
|
BCC LAB_20DC ; branch if no low byte overflow
|
| 4433 |
|
|
|
| 4434 |
|
|
INX ; else increment high byte
|
| 4435 |
|
|
LAB_20DC
|
| 4436 |
|
|
STX Sendh ; save string end high byte
|
| 4437 |
|
|
LDA ssptr_h ; get string start high byte
|
| 4438 |
|
|
CMP #>Ram_base ; compare with start of program memory
|
| 4439 |
|
|
BCS LAB_RTST ; branch if not in utility area
|
| 4440 |
|
|
|
| 4441 |
|
|
; string in utility area, move to string memory
|
| 4442 |
|
|
TYA ; copy length to A
|
| 4443 |
|
|
JSR LAB_209C ; copy des_pl/h to des_2l/h and make string space A bytes
|
| 4444 |
|
|
; long
|
| 4445 |
|
|
LDX ssptr_l ; get string start low byte
|
| 4446 |
|
|
LDY ssptr_h ; get string start high byte
|
| 4447 |
|
|
JSR LAB_2298 ; store string A bytes long from XY to (Sutill)
|
| 4448 |
|
|
|
| 4449 |
|
|
; check for space on descriptor stack then ..
|
| 4450 |
|
|
; put string address and length on descriptor stack and update stack pointers
|
| 4451 |
|
|
|
| 4452 |
|
|
LAB_RTST
|
| 4453 |
|
|
LDX next_s ; get string stack pointer
|
| 4454 |
|
|
CPX #des_sk+$09 ; compare with max+1
|
| 4455 |
|
|
BNE LAB_20F8 ; branch if space on string stack
|
| 4456 |
|
|
|
| 4457 |
|
|
; else do string too complex error
|
| 4458 |
|
|
LDX #$1C ; error code $1C ("String too complex" error)
|
| 4459 |
|
|
LAB_20F5
|
| 4460 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 4461 |
|
|
|
| 4462 |
|
|
; put string address and length on descriptor stack and update stack pointers
|
| 4463 |
|
|
|
| 4464 |
|
|
LAB_20F8
|
| 4465 |
|
|
LDA str_ln ; get string length
|
| 4466 |
|
|
STA PLUS_0,X ; put on string stack
|
| 4467 |
|
|
LDA str_pl ; get string pointer low byte
|
| 4468 |
|
|
STA PLUS_1,X ; put on string stack
|
| 4469 |
|
|
LDA str_ph ; get string pointer high byte
|
| 4470 |
|
|
STA PLUS_2,X ; put on string stack
|
| 4471 |
|
|
LDY #$00 ; clear Y
|
| 4472 |
|
|
STX des_pl ; save string descriptor pointer low byte
|
| 4473 |
|
|
STY des_ph ; save string descriptor pointer high byte (always $00)
|
| 4474 |
|
|
DEY ; Y = $FF
|
| 4475 |
|
|
STY Dtypef ; save data type flag, $FF=string
|
| 4476 |
|
|
STX last_sl ; save old stack pointer (current top item)
|
| 4477 |
|
|
INX ; update stack pointer
|
| 4478 |
|
|
INX ; update stack pointer
|
| 4479 |
|
|
INX ; update stack pointer
|
| 4480 |
|
|
STX next_s ; save new top item value
|
| 4481 |
|
|
RTS
|
| 4482 |
|
|
|
| 4483 |
|
|
; Build descriptor
|
| 4484 |
|
|
; make space in string memory for string A long
|
| 4485 |
|
|
; return X=Sutill=ptr low byte, Y=Sutill=ptr high byte
|
| 4486 |
|
|
|
| 4487 |
|
|
LAB_2115
|
| 4488 |
|
|
LSR Gclctd ; clear garbage collected flag (b7)
|
| 4489 |
|
|
|
| 4490 |
|
|
; make space for string A long
|
| 4491 |
|
|
LAB_2117
|
| 4492 |
|
|
PHA ; save string length
|
| 4493 |
|
|
EOR #$FF ; complement it
|
| 4494 |
|
|
SEC ; set carry for subtract (twos comp add)
|
| 4495 |
|
|
ADC Sstorl ; add bottom of string space low byte (subtract length)
|
| 4496 |
|
|
LDY Sstorh ; get bottom of string space high byte
|
| 4497 |
|
|
BCS LAB_2122 ; skip decrement if no underflow
|
| 4498 |
|
|
|
| 4499 |
|
|
DEY ; decrement bottom of string space high byte
|
| 4500 |
|
|
LAB_2122
|
| 4501 |
|
|
CPY Earryh ; compare with array mem end high byte
|
| 4502 |
|
|
BCC LAB_2137 ; do out of memory error if less
|
| 4503 |
|
|
|
| 4504 |
|
|
BNE LAB_212C ; if not = skip next test
|
| 4505 |
|
|
|
| 4506 |
|
|
CMP Earryl ; compare with array mem end low byte
|
| 4507 |
|
|
BCC LAB_2137 ; do out of memory error if less
|
| 4508 |
|
|
|
| 4509 |
|
|
LAB_212C
|
| 4510 |
|
|
STA Sstorl ; save bottom of string space low byte
|
| 4511 |
|
|
STY Sstorh ; save bottom of string space high byte
|
| 4512 |
|
|
STA Sutill ; save string utility ptr low byte
|
| 4513 |
|
|
STY Sutilh ; save string utility ptr high byte
|
| 4514 |
|
|
TAX ; copy low byte to X
|
| 4515 |
|
|
PLA ; get string length back
|
| 4516 |
|
|
RTS
|
| 4517 |
|
|
|
| 4518 |
|
|
LAB_2137
|
| 4519 |
|
|
LDX #$0C ; error code $0C ("Out of memory" error)
|
| 4520 |
|
|
LDA Gclctd ; get garbage collected flag
|
| 4521 |
|
|
BMI LAB_20F5 ; if set then do error code X
|
| 4522 |
|
|
|
| 4523 |
|
|
JSR LAB_GARB ; else go do garbage collection
|
| 4524 |
|
|
LDA #$80 ; flag for garbage collected
|
| 4525 |
|
|
STA Gclctd ; set garbage collected flag
|
| 4526 |
|
|
PLA ; pull length
|
| 4527 |
|
|
BNE LAB_2117 ; go try again (loop always, length should never be = $00)
|
| 4528 |
|
|
|
| 4529 |
|
|
; garbage collection routine
|
| 4530 |
|
|
|
| 4531 |
|
|
LAB_GARB
|
| 4532 |
|
|
LDX Ememl ; get end of mem low byte
|
| 4533 |
|
|
LDA Ememh ; get end of mem high byte
|
| 4534 |
|
|
|
| 4535 |
|
|
; re-run routine from last ending
|
| 4536 |
|
|
|
| 4537 |
|
|
LAB_214B
|
| 4538 |
|
|
STX Sstorl ; set string storage low byte
|
| 4539 |
|
|
STA Sstorh ; set string storage high byte
|
| 4540 |
|
|
LDY #$00 ; clear index
|
| 4541 |
|
|
STY garb_h ; clear working pointer high byte (flag no strings to move)
|
| 4542 |
|
|
LDA Earryl ; get array mem end low byte
|
| 4543 |
|
|
LDX Earryh ; get array mem end high byte
|
| 4544 |
|
|
STA Histrl ; save as highest string low byte
|
| 4545 |
|
|
STX Histrh ; save as highest string high byte
|
| 4546 |
|
|
LDA #des_sk ; set descriptor stack pointer
|
| 4547 |
|
|
STA ut1_pl ; save descriptor stack pointer low byte
|
| 4548 |
|
|
STY ut1_ph ; save descriptor stack pointer high byte ($00)
|
| 4549 |
|
|
LAB_2161
|
| 4550 |
|
|
CMP next_s ; compare with descriptor stack pointer
|
| 4551 |
|
|
BEQ LAB_216A ; branch if =
|
| 4552 |
|
|
|
| 4553 |
|
|
JSR LAB_21D7 ; go garbage collect descriptor stack
|
| 4554 |
|
|
BEQ LAB_2161 ; loop always
|
| 4555 |
|
|
|
| 4556 |
|
|
; done stacked strings, now do string vars
|
| 4557 |
|
|
LAB_216A
|
| 4558 |
|
|
ASL g_step ; set step size = $06
|
| 4559 |
|
|
LDA Svarl ; get start of vars low byte
|
| 4560 |
|
|
LDX Svarh ; get start of vars high byte
|
| 4561 |
|
|
STA ut1_pl ; save as pointer low byte
|
| 4562 |
|
|
STX ut1_ph ; save as pointer high byte
|
| 4563 |
|
|
LAB_2176
|
| 4564 |
|
|
CPX Sarryh ; compare start of arrays high byte
|
| 4565 |
|
|
BNE LAB_217E ; branch if no high byte match
|
| 4566 |
|
|
|
| 4567 |
|
|
CMP Sarryl ; else compare start of arrays low byte
|
| 4568 |
|
|
BEQ LAB_2183 ; branch if = var mem end
|
| 4569 |
|
|
|
| 4570 |
|
|
LAB_217E
|
| 4571 |
|
|
JSR LAB_21D1 ; go garbage collect strings
|
| 4572 |
|
|
BEQ LAB_2176 ; loop always
|
| 4573 |
|
|
|
| 4574 |
|
|
; done string vars, now do string arrays
|
| 4575 |
|
|
LAB_2183
|
| 4576 |
|
|
STA Nbendl ; save start of arrays low byte as working pointer
|
| 4577 |
|
|
STX Nbendh ; save start of arrays high byte as working pointer
|
| 4578 |
|
|
LDA #$04 ; set step size
|
| 4579 |
|
|
STA g_step ; save step size
|
| 4580 |
|
|
LAB_218B
|
| 4581 |
|
|
LDA Nbendl ; get pointer low byte
|
| 4582 |
|
|
LDX Nbendh ; get pointer high byte
|
| 4583 |
|
|
LAB_218F
|
| 4584 |
|
|
CPX Earryh ; compare with array mem end high byte
|
| 4585 |
|
|
BNE LAB_219A ; branch if not at end
|
| 4586 |
|
|
|
| 4587 |
|
|
CMP Earryl ; else compare with array mem end low byte
|
| 4588 |
|
|
BEQ LAB_2216 ; tidy up and exit if at end
|
| 4589 |
|
|
|
| 4590 |
|
|
LAB_219A
|
| 4591 |
|
|
STA ut1_pl ; save pointer low byte
|
| 4592 |
|
|
STX ut1_ph ; save pointer high byte
|
| 4593 |
|
|
LDY #$02 ; set index
|
| 4594 |
|
|
LDA (ut1_pl),Y ; get array size low byte
|
| 4595 |
|
|
ADC Nbendl ; add start of this array low byte
|
| 4596 |
|
|
STA Nbendl ; save start of next array low byte
|
| 4597 |
|
|
INY ; increment index
|
| 4598 |
|
|
LDA (ut1_pl),Y ; get array size high byte
|
| 4599 |
|
|
ADC Nbendh ; add start of this array high byte
|
| 4600 |
|
|
STA Nbendh ; save start of next array high byte
|
| 4601 |
|
|
LDY #$01 ; set index
|
| 4602 |
|
|
LDA (ut1_pl),Y ; get name second byte
|
| 4603 |
|
|
BPL LAB_218B ; skip if not string array
|
| 4604 |
|
|
|
| 4605 |
|
|
; was string array so ..
|
| 4606 |
|
|
|
| 4607 |
|
|
LDY #$04 ; set index
|
| 4608 |
|
|
LDA (ut1_pl),Y ; get # of dimensions
|
| 4609 |
|
|
ASL ; *2
|
| 4610 |
|
|
ADC #$05 ; +5 (array header size)
|
| 4611 |
|
|
JSR LAB_2208 ; go set up for first element
|
| 4612 |
|
|
LAB_21C4
|
| 4613 |
|
|
CPX Nbendh ; compare with start of next array high byte
|
| 4614 |
|
|
BNE LAB_21CC ; branch if <> (go do this array)
|
| 4615 |
|
|
|
| 4616 |
|
|
CMP Nbendl ; else compare element pointer low byte with next array
|
| 4617 |
|
|
; low byte
|
| 4618 |
|
|
BEQ LAB_218F ; if equal then go do next array
|
| 4619 |
|
|
|
| 4620 |
|
|
LAB_21CC
|
| 4621 |
|
|
JSR LAB_21D7 ; go defrag array strings
|
| 4622 |
|
|
BEQ LAB_21C4 ; go do next array string (loop always)
|
| 4623 |
|
|
|
| 4624 |
|
|
; defrag string variables
|
| 4625 |
|
|
; enter with XA = variable pointer
|
| 4626 |
|
|
; return with XA = next variable pointer
|
| 4627 |
|
|
|
| 4628 |
|
|
LAB_21D1
|
| 4629 |
|
|
INY ; increment index (Y was $00)
|
| 4630 |
|
|
LDA (ut1_pl),Y ; get var name byte 2
|
| 4631 |
|
|
BPL LAB_2206 ; if not string, step pointer to next var and return
|
| 4632 |
|
|
|
| 4633 |
|
|
INY ; else increment index
|
| 4634 |
|
|
LAB_21D7
|
| 4635 |
|
|
LDA (ut1_pl),Y ; get string length
|
| 4636 |
|
|
BEQ LAB_2206 ; if null, step pointer to next string and return
|
| 4637 |
|
|
|
| 4638 |
|
|
INY ; else increment index
|
| 4639 |
|
|
LDA (ut1_pl),Y ; get string pointer low byte
|
| 4640 |
|
|
TAX ; copy to X
|
| 4641 |
|
|
INY ; increment index
|
| 4642 |
|
|
LDA (ut1_pl),Y ; get string pointer high byte
|
| 4643 |
|
|
CMP Sstorh ; compare bottom of string space high byte
|
| 4644 |
|
|
BCC LAB_21EC ; branch if less
|
| 4645 |
|
|
|
| 4646 |
|
|
BNE LAB_2206 ; if greater, step pointer to next string and return
|
| 4647 |
|
|
|
| 4648 |
|
|
; high bytes were = so compare low bytes
|
| 4649 |
|
|
CPX Sstorl ; compare bottom of string space low byte
|
| 4650 |
|
|
BCS LAB_2206 ; if >=, step pointer to next string and return
|
| 4651 |
|
|
|
| 4652 |
|
|
; string pointer is < string storage pointer (pos in mem)
|
| 4653 |
|
|
LAB_21EC
|
| 4654 |
|
|
CMP Histrh ; compare to highest string high byte
|
| 4655 |
|
|
BCC LAB_2207 ; if <, step pointer to next string and return
|
| 4656 |
|
|
|
| 4657 |
|
|
BNE LAB_21F6 ; if > update pointers, step to next and return
|
| 4658 |
|
|
|
| 4659 |
|
|
; high bytes were = so compare low bytes
|
| 4660 |
|
|
CPX Histrl ; compare to highest string low byte
|
| 4661 |
|
|
BCC LAB_2207 ; if <, step pointer to next string and return
|
| 4662 |
|
|
|
| 4663 |
|
|
; string is in string memory space
|
| 4664 |
|
|
LAB_21F6
|
| 4665 |
|
|
STX Histrl ; save as new highest string low byte
|
| 4666 |
|
|
STA Histrh ; save as new highest string high byte
|
| 4667 |
|
|
LDA ut1_pl ; get start of vars(descriptors) low byte
|
| 4668 |
|
|
LDX ut1_ph ; get start of vars(descriptors) high byte
|
| 4669 |
|
|
STA garb_l ; save as working pointer low byte
|
| 4670 |
|
|
STX garb_h ; save as working pointer high byte
|
| 4671 |
|
|
DEY ; decrement index DIFFERS
|
| 4672 |
|
|
DEY ; decrement index (should point to descriptor start)
|
| 4673 |
|
|
STY g_indx ; save index pointer
|
| 4674 |
|
|
|
| 4675 |
|
|
; step pointer to next string
|
| 4676 |
|
|
LAB_2206
|
| 4677 |
|
|
CLC ; clear carry for add
|
| 4678 |
|
|
LAB_2207
|
| 4679 |
|
|
LDA g_step ; get step size
|
| 4680 |
|
|
LAB_2208
|
| 4681 |
|
|
ADC ut1_pl ; add pointer low byte
|
| 4682 |
|
|
STA ut1_pl ; save pointer low byte
|
| 4683 |
|
|
BCC LAB_2211 ; branch if no overflow
|
| 4684 |
|
|
|
| 4685 |
|
|
INC ut1_ph ; else increment high byte
|
| 4686 |
|
|
LAB_2211
|
| 4687 |
|
|
LDX ut1_ph ; get pointer high byte
|
| 4688 |
|
|
LDY #$00 ; clear Y
|
| 4689 |
|
|
RTS
|
| 4690 |
|
|
|
| 4691 |
|
|
; search complete, now either exit or set-up and move string
|
| 4692 |
|
|
|
| 4693 |
|
|
LAB_2216
|
| 4694 |
|
|
DEC g_step ; decrement step size (now $03 for descriptor stack)
|
| 4695 |
|
|
LDX garb_h ; get string to move high byte
|
| 4696 |
|
|
BEQ LAB_2211 ; exit if nothing to move
|
| 4697 |
|
|
|
| 4698 |
|
|
LDY g_indx ; get index byte back (points to descriptor)
|
| 4699 |
|
|
CLC ; clear carry for add
|
| 4700 |
|
|
LDA (garb_l),Y ; get string length
|
| 4701 |
|
|
ADC Histrl ; add highest string low byte
|
| 4702 |
|
|
STA Obendl ; save old block end low pointer
|
| 4703 |
|
|
LDA Histrh ; get highest string high byte
|
| 4704 |
|
|
ADC #$00 ; add any carry
|
| 4705 |
|
|
STA Obendh ; save old block end high byte
|
| 4706 |
|
|
LDA Sstorl ; get bottom of string space low byte
|
| 4707 |
|
|
LDX Sstorh ; get bottom of string space high byte
|
| 4708 |
|
|
STA Nbendl ; save new block end low byte
|
| 4709 |
|
|
STX Nbendh ; save new block end high byte
|
| 4710 |
|
|
JSR LAB_11D6 ; open up space in memory, don't set array end
|
| 4711 |
|
|
LDY g_indx ; get index byte
|
| 4712 |
|
|
INY ; point to descriptor low byte
|
| 4713 |
|
|
LDA Nbendl ; get string pointer low byte
|
| 4714 |
|
|
STA (garb_l),Y ; save new string pointer low byte
|
| 4715 |
|
|
TAX ; copy string pointer low byte
|
| 4716 |
|
|
INC Nbendh ; correct high byte (move sets high byte -1)
|
| 4717 |
|
|
LDA Nbendh ; get new string pointer high byte
|
| 4718 |
|
|
INY ; point to descriptor high byte
|
| 4719 |
|
|
STA (garb_l),Y ; save new string pointer high byte
|
| 4720 |
|
|
JMP LAB_214B ; re-run routine from last ending
|
| 4721 |
|
|
; (but don't collect this string)
|
| 4722 |
|
|
|
| 4723 |
|
|
; concatenate
|
| 4724 |
|
|
; add strings, string 1 is in descriptor des_pl, string 2 is in line
|
| 4725 |
|
|
|
| 4726 |
|
|
LAB_224D
|
| 4727 |
|
|
LDA des_ph ; get descriptor pointer high byte
|
| 4728 |
|
|
PHA ; put on stack
|
| 4729 |
|
|
LDA des_pl ; get descriptor pointer low byte
|
| 4730 |
|
|
PHA ; put on stack
|
| 4731 |
|
|
JSR LAB_GVAL ; get value from line
|
| 4732 |
|
|
JSR LAB_CTST ; check if source is string, else do type mismatch
|
| 4733 |
|
|
PLA ; get descriptor pointer low byte back
|
| 4734 |
|
|
STA ssptr_l ; set pointer low byte
|
| 4735 |
|
|
PLA ; get descriptor pointer high byte back
|
| 4736 |
|
|
STA ssptr_h ; set pointer high byte
|
| 4737 |
|
|
LDY #$00 ; clear index
|
| 4738 |
|
|
LDA (ssptr_l),Y ; get length_1 from descriptor
|
| 4739 |
|
|
CLC ; clear carry for add
|
| 4740 |
|
|
ADC (des_pl),Y ; add length_2
|
| 4741 |
|
|
BCC LAB_226D ; branch if no overflow
|
| 4742 |
|
|
|
| 4743 |
|
|
LDX #$1A ; else set error code $1A ("String too long" error)
|
| 4744 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 4745 |
|
|
|
| 4746 |
|
|
LAB_226D
|
| 4747 |
|
|
JSR LAB_209C ; copy des_pl/h to des_2l/h and make string space A bytes
|
| 4748 |
|
|
; long
|
| 4749 |
|
|
JSR LAB_228A ; copy string from descriptor (sdescr) to (Sutill)
|
| 4750 |
|
|
LDA des_2l ; get descriptor pointer low byte
|
| 4751 |
|
|
LDY des_2h ; get descriptor pointer high byte
|
| 4752 |
|
|
JSR LAB_22BA ; pop (YA) descriptor off stack or from top of string space
|
| 4753 |
|
|
; returns with A = length, ut1_pl = pointer low byte,
|
| 4754 |
|
|
; ut1_ph = pointer high byte
|
| 4755 |
|
|
JSR LAB_229C ; store string A bytes long from (ut1_pl) to (Sutill)
|
| 4756 |
|
|
LDA ssptr_l ;.set descriptor pointer low byte
|
| 4757 |
|
|
LDY ssptr_h ;.set descriptor pointer high byte
|
| 4758 |
|
|
JSR LAB_22BA ; pop (YA) descriptor off stack or from top of string space
|
| 4759 |
|
|
; returns with A = length, X=ut1_pl=pointer low byte,
|
| 4760 |
|
|
; Y=ut1_ph=pointer high byte
|
| 4761 |
|
|
JSR LAB_RTST ; check for space on descriptor stack then put string
|
| 4762 |
|
|
; address and length on descriptor stack and update stack
|
| 4763 |
|
|
; pointers
|
| 4764 |
|
|
JMP LAB_1ADB ;.continue evaluation
|
| 4765 |
|
|
|
| 4766 |
|
|
; copy string from descriptor (sdescr) to (Sutill)
|
| 4767 |
|
|
|
| 4768 |
|
|
LAB_228A
|
| 4769 |
|
|
LDY #$00 ; clear index
|
| 4770 |
|
|
LDA (sdescr),Y ; get string length
|
| 4771 |
|
|
PHA ; save on stack
|
| 4772 |
|
|
INY ; increment index
|
| 4773 |
|
|
LDA (sdescr),Y ; get source string pointer low byte
|
| 4774 |
|
|
TAX ; copy to X
|
| 4775 |
|
|
INY ; increment index
|
| 4776 |
|
|
LDA (sdescr),Y ; get source string pointer high byte
|
| 4777 |
|
|
TAY ; copy to Y
|
| 4778 |
|
|
PLA ; get length back
|
| 4779 |
|
|
|
| 4780 |
|
|
; store string A bytes long from YX to (Sutill)
|
| 4781 |
|
|
|
| 4782 |
|
|
LAB_2298
|
| 4783 |
|
|
STX ut1_pl ; save source string pointer low byte
|
| 4784 |
|
|
STY ut1_ph ; save source string pointer high byte
|
| 4785 |
|
|
|
| 4786 |
|
|
; store string A bytes long from (ut1_pl) to (Sutill)
|
| 4787 |
|
|
|
| 4788 |
|
|
LAB_229C
|
| 4789 |
|
|
TAX ; copy length to index (don't count with Y)
|
| 4790 |
|
|
BEQ LAB_22B2 ; branch if = $0 (null string) no need to add zero length
|
| 4791 |
|
|
|
| 4792 |
|
|
LDY #$00 ; zero pointer (copy forward)
|
| 4793 |
|
|
LAB_22A0
|
| 4794 |
|
|
LDA (ut1_pl),Y ; get source byte
|
| 4795 |
|
|
STA (Sutill),Y ; save destination byte
|
| 4796 |
|
|
|
| 4797 |
|
|
INY ; increment index
|
| 4798 |
|
|
DEX ; decrement counter
|
| 4799 |
|
|
BNE LAB_22A0 ; loop while <> 0
|
| 4800 |
|
|
|
| 4801 |
|
|
TYA ; restore length from Y
|
| 4802 |
|
|
LAB_22A9
|
| 4803 |
|
|
CLC ; clear carry for add
|
| 4804 |
|
|
ADC Sutill ; add string utility ptr low byte
|
| 4805 |
|
|
STA Sutill ; save string utility ptr low byte
|
| 4806 |
|
|
BCC LAB_22B2 ; branch if no carry
|
| 4807 |
|
|
|
| 4808 |
|
|
INC Sutilh ; else increment string utility ptr high byte
|
| 4809 |
|
|
LAB_22B2
|
| 4810 |
|
|
RTS
|
| 4811 |
|
|
|
| 4812 |
|
|
; evaluate string
|
| 4813 |
|
|
|
| 4814 |
|
|
LAB_EVST
|
| 4815 |
|
|
JSR LAB_CTST ; check if source is string, else do type mismatch
|
| 4816 |
|
|
|
| 4817 |
|
|
; pop string off descriptor stack, or from top of string space
|
| 4818 |
|
|
; returns with A = length, X=pointer low byte, Y=pointer high byte
|
| 4819 |
|
|
|
| 4820 |
|
|
LAB_22B6
|
| 4821 |
|
|
LDA des_pl ; get descriptor pointer low byte
|
| 4822 |
|
|
LDY des_ph ; get descriptor pointer high byte
|
| 4823 |
|
|
|
| 4824 |
|
|
; pop (YA) descriptor off stack or from top of string space
|
| 4825 |
|
|
; returns with A = length, X=ut1_pl=pointer low byte, Y=ut1_ph=pointer high byte
|
| 4826 |
|
|
|
| 4827 |
|
|
LAB_22BA
|
| 4828 |
|
|
STA ut1_pl ; save descriptor pointer low byte
|
| 4829 |
|
|
STY ut1_ph ; save descriptor pointer high byte
|
| 4830 |
|
|
JSR LAB_22EB ; clean descriptor stack, YA = pointer
|
| 4831 |
|
|
PHP ; save status flags
|
| 4832 |
|
|
LDY #$00 ; clear index
|
| 4833 |
|
|
LDA (ut1_pl),Y ; get length from string descriptor
|
| 4834 |
|
|
PHA ; put on stack
|
| 4835 |
|
|
INY ; increment index
|
| 4836 |
|
|
LDA (ut1_pl),Y ; get string pointer low byte from descriptor
|
| 4837 |
|
|
TAX ; copy to X
|
| 4838 |
|
|
INY ; increment index
|
| 4839 |
|
|
LDA (ut1_pl),Y ; get string pointer high byte from descriptor
|
| 4840 |
|
|
TAY ; copy to Y
|
| 4841 |
|
|
PLA ; get string length back
|
| 4842 |
|
|
PLP ; restore status
|
| 4843 |
|
|
BNE LAB_22E6 ; branch if pointer <> last_sl,last_sh
|
| 4844 |
|
|
|
| 4845 |
|
|
CPY Sstorh ; compare bottom of string space high byte
|
| 4846 |
|
|
BNE LAB_22E6 ; branch if <>
|
| 4847 |
|
|
|
| 4848 |
|
|
CPX Sstorl ; else compare bottom of string space low byte
|
| 4849 |
|
|
BNE LAB_22E6 ; branch if <>
|
| 4850 |
|
|
|
| 4851 |
|
|
PHA ; save string length
|
| 4852 |
|
|
CLC ; clear carry for add
|
| 4853 |
|
|
ADC Sstorl ; add bottom of string space low byte
|
| 4854 |
|
|
STA Sstorl ; save bottom of string space low byte
|
| 4855 |
|
|
BCC LAB_22E5 ; skip increment if no overflow
|
| 4856 |
|
|
|
| 4857 |
|
|
INC Sstorh ; increment bottom of string space high byte
|
| 4858 |
|
|
LAB_22E5
|
| 4859 |
|
|
PLA ; restore string length
|
| 4860 |
|
|
LAB_22E6
|
| 4861 |
|
|
STX ut1_pl ; save string pointer low byte
|
| 4862 |
|
|
STY ut1_ph ; save string pointer high byte
|
| 4863 |
|
|
RTS
|
| 4864 |
|
|
|
| 4865 |
|
|
; clean descriptor stack, YA = pointer
|
| 4866 |
|
|
; checks if AY is on the descriptor stack, if so does a stack discard
|
| 4867 |
|
|
|
| 4868 |
|
|
LAB_22EB
|
| 4869 |
|
|
CPY last_sh ; compare pointer high byte
|
| 4870 |
|
|
BNE LAB_22FB ; exit if <>
|
| 4871 |
|
|
|
| 4872 |
|
|
CMP last_sl ; compare pointer low byte
|
| 4873 |
|
|
BNE LAB_22FB ; exit if <>
|
| 4874 |
|
|
|
| 4875 |
|
|
STA next_s ; save descriptor stack pointer
|
| 4876 |
|
|
SBC #$03 ; -3
|
| 4877 |
|
|
STA last_sl ; save low byte -3
|
| 4878 |
|
|
LDY #$00 ; clear high byte
|
| 4879 |
|
|
LAB_22FB
|
| 4880 |
|
|
RTS
|
| 4881 |
|
|
|
| 4882 |
|
|
; perform CHR$()
|
| 4883 |
|
|
|
| 4884 |
|
|
LAB_CHRS
|
| 4885 |
|
|
JSR LAB_EVBY ; evaluate byte expression, result in X
|
| 4886 |
|
|
TXA ; copy to A
|
| 4887 |
|
|
PHA ; save character
|
| 4888 |
|
|
LDA #$01 ; string is single byte
|
| 4889 |
|
|
JSR LAB_MSSP ; make string space A bytes long A=$AC=length,
|
| 4890 |
|
|
; X=$AD=Sutill=ptr low byte, Y=$AE=Sutilh=ptr high byte
|
| 4891 |
|
|
PLA ; get character back
|
| 4892 |
|
|
LDY #$00 ; clear index
|
| 4893 |
|
|
STA (str_pl),Y ; save byte in string (byte IS string!)
|
| 4894 |
|
|
JMP LAB_RTST ; check for space on descriptor stack then put string
|
| 4895 |
|
|
; address and length on descriptor stack and update stack
|
| 4896 |
|
|
; pointers
|
| 4897 |
|
|
|
| 4898 |
|
|
; perform LEFT$()
|
| 4899 |
|
|
|
| 4900 |
|
|
LAB_LEFT
|
| 4901 |
|
|
PHA ; push byte parameter
|
| 4902 |
|
|
JSR LAB_236F ; pull string data and byte parameter from stack
|
| 4903 |
|
|
; return pointer in des_2l/h, byte in A (and X), Y=0
|
| 4904 |
|
|
CMP (des_2l),Y ; compare byte parameter with string length
|
| 4905 |
|
|
TYA ; clear A
|
| 4906 |
|
|
BEQ LAB_2316 ; go do string copy (branch always)
|
| 4907 |
|
|
|
| 4908 |
|
|
; perform RIGHT$()
|
| 4909 |
|
|
|
| 4910 |
|
|
LAB_RIGHT
|
| 4911 |
|
|
PHA ; push byte parameter
|
| 4912 |
|
|
JSR LAB_236F ; pull string data and byte parameter from stack
|
| 4913 |
|
|
; return pointer in des_2l/h, byte in A (and X), Y=0
|
| 4914 |
|
|
CLC ; clear carry for add-1
|
| 4915 |
|
|
SBC (des_2l),Y ; subtract string length
|
| 4916 |
|
|
EOR #$FF ; invert it (A=LEN(expression$)-l)
|
| 4917 |
|
|
|
| 4918 |
|
|
LAB_2316
|
| 4919 |
|
|
BCC LAB_231C ; branch if string length > byte parameter
|
| 4920 |
|
|
|
| 4921 |
|
|
LDA (des_2l),Y ; else make parameter = length
|
| 4922 |
|
|
TAX ; copy to byte parameter copy
|
| 4923 |
|
|
TYA ; clear string start offset
|
| 4924 |
|
|
LAB_231C
|
| 4925 |
|
|
PHA ; save string start offset
|
| 4926 |
|
|
LAB_231D
|
| 4927 |
|
|
TXA ; copy byte parameter (or string length if <)
|
| 4928 |
|
|
LAB_231E
|
| 4929 |
|
|
PHA ; save string length
|
| 4930 |
|
|
JSR LAB_MSSP ; make string space A bytes long A=$AC=length,
|
| 4931 |
|
|
; X=$AD=Sutill=ptr low byte, Y=$AE=Sutilh=ptr high byte
|
| 4932 |
|
|
LDA des_2l ; get descriptor pointer low byte
|
| 4933 |
|
|
LDY des_2h ; get descriptor pointer high byte
|
| 4934 |
|
|
JSR LAB_22BA ; pop (YA) descriptor off stack or from top of string space
|
| 4935 |
|
|
; returns with A = length, X=ut1_pl=pointer low byte,
|
| 4936 |
|
|
; Y=ut1_ph=pointer high byte
|
| 4937 |
|
|
PLA ; get string length back
|
| 4938 |
|
|
TAY ; copy length to Y
|
| 4939 |
|
|
PLA ; get string start offset back
|
| 4940 |
|
|
CLC ; clear carry for add
|
| 4941 |
|
|
ADC ut1_pl ; add start offset to string start pointer low byte
|
| 4942 |
|
|
STA ut1_pl ; save string start pointer low byte
|
| 4943 |
|
|
BCC LAB_2335 ; branch if no overflow
|
| 4944 |
|
|
|
| 4945 |
|
|
INC ut1_ph ; else increment string start pointer high byte
|
| 4946 |
|
|
LAB_2335
|
| 4947 |
|
|
TYA ; copy length to A
|
| 4948 |
|
|
JSR LAB_229C ; store string A bytes long from (ut1_pl) to (Sutill)
|
| 4949 |
|
|
JMP LAB_RTST ; check for space on descriptor stack then put string
|
| 4950 |
|
|
; address and length on descriptor stack and update stack
|
| 4951 |
|
|
; pointers
|
| 4952 |
|
|
|
| 4953 |
|
|
; perform MID$()
|
| 4954 |
|
|
|
| 4955 |
|
|
LAB_MIDS
|
| 4956 |
|
|
PHA ; push byte parameter
|
| 4957 |
|
|
LDA #$FF ; set default length = 255
|
| 4958 |
|
|
STA mids_l ; save default length
|
| 4959 |
|
|
JSR LAB_GBYT ; scan memory
|
| 4960 |
|
|
CMP #')' ; compare with ")"
|
| 4961 |
|
|
BEQ LAB_2358 ; branch if = ")" (skip second byte get)
|
| 4962 |
|
|
|
| 4963 |
|
|
JSR LAB_1C01 ; scan for "," , else do syntax error then warm start
|
| 4964 |
|
|
JSR LAB_GTBY ; get byte parameter (use copy in mids_l)
|
| 4965 |
|
|
LAB_2358
|
| 4966 |
|
|
JSR LAB_236F ; pull string data and byte parameter from stack
|
| 4967 |
|
|
; return pointer in des_2l/h, byte in A (and X), Y=0
|
| 4968 |
|
|
DEX ; decrement start index
|
| 4969 |
|
|
TXA ; copy to A
|
| 4970 |
|
|
PHA ; save string start offset
|
| 4971 |
|
|
CLC ; clear carry for sub-1
|
| 4972 |
|
|
LDX #$00 ; clear output string length
|
| 4973 |
|
|
SBC (des_2l),Y ; subtract string length
|
| 4974 |
|
|
BCS LAB_231D ; if start>string length go do null string
|
| 4975 |
|
|
|
| 4976 |
|
|
EOR #$FF ; complement -length
|
| 4977 |
|
|
CMP mids_l ; compare byte parameter
|
| 4978 |
|
|
BCC LAB_231E ; if length>remaining string go do RIGHT$
|
| 4979 |
|
|
|
| 4980 |
|
|
LDA mids_l ; get length byte
|
| 4981 |
|
|
BCS LAB_231E ; go do string copy (branch always)
|
| 4982 |
|
|
|
| 4983 |
|
|
; pull string data and byte parameter from stack
|
| 4984 |
|
|
; return pointer in des_2l/h, byte in A (and X), Y=0
|
| 4985 |
|
|
|
| 4986 |
|
|
LAB_236F
|
| 4987 |
|
|
JSR LAB_1BFB ; scan for ")" , else do syntax error then warm start
|
| 4988 |
|
|
PLA ; pull return address low byte (return address)
|
| 4989 |
|
|
STA Fnxjpl ; save functions jump vector low byte
|
| 4990 |
|
|
PLA ; pull return address high byte (return address)
|
| 4991 |
|
|
STA Fnxjph ; save functions jump vector high byte
|
| 4992 |
|
|
PLA ; pull byte parameter
|
| 4993 |
|
|
TAX ; copy byte parameter to X
|
| 4994 |
|
|
PLA ; pull string pointer low byte
|
| 4995 |
|
|
STA des_2l ; save it
|
| 4996 |
|
|
PLA ; pull string pointer high byte
|
| 4997 |
|
|
STA des_2h ; save it
|
| 4998 |
|
|
LDY #$00 ; clear index
|
| 4999 |
|
|
TXA ; copy byte parameter
|
| 5000 |
|
|
BEQ LAB_23A8 ; if null do function call error then warm start
|
| 5001 |
|
|
|
| 5002 |
|
|
INC Fnxjpl ; increment function jump vector low byte
|
| 5003 |
|
|
; (JSR pushes return addr-1. this is all very nice
|
| 5004 |
|
|
; but will go tits up if either call is on a page
|
| 5005 |
|
|
; boundary!)
|
| 5006 |
|
|
JMP (Fnxjpl) ; in effect, RTS
|
| 5007 |
|
|
|
| 5008 |
|
|
; perform LCASE$()
|
| 5009 |
|
|
|
| 5010 |
|
|
LAB_LCASE
|
| 5011 |
|
|
JSR LAB_EVST ; evaluate string
|
| 5012 |
|
|
STA str_ln ; set string length
|
| 5013 |
|
|
TAY ; copy length to Y
|
| 5014 |
|
|
BEQ NoString ; branch if null string
|
| 5015 |
|
|
|
| 5016 |
|
|
JSR LAB_MSSP ; make string space A bytes long A=length,
|
| 5017 |
|
|
; X=Sutill=ptr low byte, Y=Sutilh=ptr high byte
|
| 5018 |
|
|
STX str_pl ; save string pointer low byte
|
| 5019 |
|
|
STY str_ph ; save string pointer high byte
|
| 5020 |
|
|
TAY ; get string length back
|
| 5021 |
|
|
|
| 5022 |
|
|
LC_loop
|
| 5023 |
|
|
DEY ; decrement index
|
| 5024 |
|
|
LDA (ut1_pl),Y ; get byte from string
|
| 5025 |
|
|
JSR LAB_1D82 ; is character "A" to "Z"
|
| 5026 |
|
|
BCC NoUcase ; branch if not upper case alpha
|
| 5027 |
|
|
|
| 5028 |
|
|
ORA #$20 ; convert upper to lower case
|
| 5029 |
|
|
NoUcase
|
| 5030 |
|
|
STA (Sutill),Y ; save byte back to string
|
| 5031 |
|
|
TYA ; test index
|
| 5032 |
|
|
BNE LC_loop ; loop if not all done
|
| 5033 |
|
|
|
| 5034 |
|
|
BEQ NoString ; tidy up and exit, branch always
|
| 5035 |
|
|
|
| 5036 |
|
|
; perform UCASE$()
|
| 5037 |
|
|
|
| 5038 |
|
|
LAB_UCASE
|
| 5039 |
|
|
JSR LAB_EVST ; evaluate string
|
| 5040 |
|
|
STA str_ln ; set string length
|
| 5041 |
|
|
TAY ; copy length to Y
|
| 5042 |
|
|
BEQ NoString ; branch if null string
|
| 5043 |
|
|
|
| 5044 |
|
|
JSR LAB_MSSP ; make string space A bytes long A=length,
|
| 5045 |
|
|
; X=Sutill=ptr low byte, Y=Sutilh=ptr high byte
|
| 5046 |
|
|
STX str_pl ; save string pointer low byte
|
| 5047 |
|
|
STY str_ph ; save string pointer high byte
|
| 5048 |
|
|
TAY ; get string length back
|
| 5049 |
|
|
|
| 5050 |
|
|
UC_loop
|
| 5051 |
|
|
DEY ; decrement index
|
| 5052 |
|
|
LDA (ut1_pl),Y ; get byte from string
|
| 5053 |
|
|
JSR LAB_CASC ; is character "a" to "z" (or "A" to "Z")
|
| 5054 |
|
|
BCC NoLcase ; branch if not alpha
|
| 5055 |
|
|
|
| 5056 |
|
|
AND #$DF ; convert lower to upper case
|
| 5057 |
|
|
NoLcase
|
| 5058 |
|
|
STA (Sutill),Y ; save byte back to string
|
| 5059 |
|
|
TYA ; test index
|
| 5060 |
|
|
BNE UC_loop ; loop if not all done
|
| 5061 |
|
|
|
| 5062 |
|
|
NoString
|
| 5063 |
|
|
JMP LAB_RTST ; check for space on descriptor stack then put string
|
| 5064 |
|
|
; address and length on descriptor stack and update stack
|
| 5065 |
|
|
; pointers
|
| 5066 |
|
|
|
| 5067 |
|
|
; perform SADD()
|
| 5068 |
|
|
|
| 5069 |
|
|
LAB_SADD
|
| 5070 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 5071 |
|
|
JSR LAB_GVAR ; get var address
|
| 5072 |
|
|
|
| 5073 |
|
|
JSR LAB_1BFB ; scan for ")", else do syntax error then warm start
|
| 5074 |
|
|
JSR LAB_CTST ; check if source is string, else do type mismatch
|
| 5075 |
|
|
|
| 5076 |
|
|
LDY #$02 ; index to string pointer high byte
|
| 5077 |
|
|
LDA (Cvaral),Y ; get string pointer high byte
|
| 5078 |
|
|
TAX ; copy string pointer high byte to X
|
| 5079 |
|
|
DEY ; index to string pointer low byte
|
| 5080 |
|
|
LDA (Cvaral),Y ; get string pointer low byte
|
| 5081 |
|
|
TAY ; copy string pointer low byte to Y
|
| 5082 |
|
|
TXA ; copy string pointer high byte to A
|
| 5083 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 5084 |
|
|
|
| 5085 |
|
|
; perform LEN()
|
| 5086 |
|
|
|
| 5087 |
|
|
LAB_LENS
|
| 5088 |
|
|
JSR LAB_ESGL ; evaluate string, get length in A (and Y)
|
| 5089 |
|
|
JMP LAB_1FD0 ; convert Y to byte in FAC1 and return
|
| 5090 |
|
|
|
| 5091 |
|
|
; evaluate string, get length in Y
|
| 5092 |
|
|
|
| 5093 |
|
|
LAB_ESGL
|
| 5094 |
|
|
JSR LAB_EVST ; evaluate string
|
| 5095 |
|
|
TAY ; copy length to Y
|
| 5096 |
|
|
RTS
|
| 5097 |
|
|
|
| 5098 |
|
|
; perform ASC()
|
| 5099 |
|
|
|
| 5100 |
|
|
LAB_ASC
|
| 5101 |
|
|
JSR LAB_ESGL ; evaluate string, get length in A (and Y)
|
| 5102 |
|
|
BEQ LAB_23A8 ; if null do function call error then warm start
|
| 5103 |
|
|
|
| 5104 |
|
|
LDY #$00 ; set index to first character
|
| 5105 |
|
|
LDA (ut1_pl),Y ; get byte
|
| 5106 |
|
|
TAY ; copy to Y
|
| 5107 |
|
|
JMP LAB_1FD0 ; convert Y to byte in FAC1 and return
|
| 5108 |
|
|
|
| 5109 |
|
|
; do function call error then warm start
|
| 5110 |
|
|
|
| 5111 |
|
|
LAB_23A8
|
| 5112 |
|
|
JMP LAB_FCER ; do function call error then warm start
|
| 5113 |
|
|
|
| 5114 |
|
|
; scan and get byte parameter
|
| 5115 |
|
|
|
| 5116 |
|
|
LAB_SGBY
|
| 5117 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 5118 |
|
|
|
| 5119 |
|
|
; get byte parameter
|
| 5120 |
|
|
|
| 5121 |
|
|
LAB_GTBY
|
| 5122 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 5123 |
|
|
; else do type mismatch
|
| 5124 |
|
|
|
| 5125 |
|
|
; evaluate byte expression, result in X
|
| 5126 |
|
|
|
| 5127 |
|
|
LAB_EVBY
|
| 5128 |
|
|
JSR LAB_EVPI ; evaluate integer expression (no check)
|
| 5129 |
|
|
|
| 5130 |
|
|
LDY FAC1_2 ; get FAC1 mantissa2
|
| 5131 |
|
|
BNE LAB_23A8 ; if top byte <> 0 do function call error then warm start
|
| 5132 |
|
|
|
| 5133 |
|
|
LDX FAC1_3 ; get FAC1 mantissa3
|
| 5134 |
|
|
JMP LAB_GBYT ; scan memory and return
|
| 5135 |
|
|
|
| 5136 |
|
|
; perform VAL()
|
| 5137 |
|
|
|
| 5138 |
|
|
LAB_VAL
|
| 5139 |
|
|
JSR LAB_ESGL ; evaluate string, get length in A (and Y)
|
| 5140 |
|
|
BNE LAB_23C5 ; branch if not null string
|
| 5141 |
|
|
|
| 5142 |
|
|
; string was null so set result = $00
|
| 5143 |
|
|
JMP LAB_24F1 ; clear FAC1 exponent and sign and return
|
| 5144 |
|
|
|
| 5145 |
|
|
LAB_23C5
|
| 5146 |
|
|
LDX Bpntrl ; get BASIC execute pointer low byte
|
| 5147 |
|
|
LDY Bpntrh ; get BASIC execute pointer high byte
|
| 5148 |
|
|
STX Btmpl ; save BASIC execute pointer low byte
|
| 5149 |
|
|
STY Btmph ; save BASIC execute pointer high byte
|
| 5150 |
|
|
LDX ut1_pl ; get string pointer low byte
|
| 5151 |
|
|
STX Bpntrl ; save as BASIC execute pointer low byte
|
| 5152 |
|
|
CLC ; clear carry
|
| 5153 |
|
|
ADC ut1_pl ; add string length
|
| 5154 |
|
|
STA ut2_pl ; save string end low byte
|
| 5155 |
|
|
LDA ut1_ph ; get string pointer high byte
|
| 5156 |
|
|
STA Bpntrh ; save as BASIC execute pointer high byte
|
| 5157 |
|
|
ADC #$00 ; add carry to high byte
|
| 5158 |
|
|
STA ut2_ph ; save string end high byte
|
| 5159 |
|
|
LDY #$00 ; set index to $00
|
| 5160 |
|
|
LDA (ut2_pl),Y ; get string end +1 byte
|
| 5161 |
|
|
PHA ; push it
|
| 5162 |
|
|
TYA ; clear A
|
| 5163 |
|
|
STA (ut2_pl),Y ; terminate string with $00
|
| 5164 |
|
|
JSR LAB_GBYT ; scan memory
|
| 5165 |
|
|
JSR LAB_2887 ; get FAC1 from string
|
| 5166 |
|
|
PLA ; restore string end +1 byte
|
| 5167 |
|
|
LDY #$00 ; set index to zero
|
| 5168 |
|
|
STA (ut2_pl),Y ; put string end byte back
|
| 5169 |
|
|
|
| 5170 |
|
|
; restore BASIC execute pointer from temp (Btmpl/Btmph)
|
| 5171 |
|
|
|
| 5172 |
|
|
LAB_23F3
|
| 5173 |
|
|
LDX Btmpl ; get BASIC execute pointer low byte back
|
| 5174 |
|
|
LDY Btmph ; get BASIC execute pointer high byte back
|
| 5175 |
|
|
STX Bpntrl ; save BASIC execute pointer low byte
|
| 5176 |
|
|
STY Bpntrh ; save BASIC execute pointer high byte
|
| 5177 |
|
|
RTS
|
| 5178 |
|
|
|
| 5179 |
|
|
; get two parameters for POKE or WAIT
|
| 5180 |
|
|
|
| 5181 |
|
|
LAB_GADB
|
| 5182 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 5183 |
|
|
; else do type mismatch
|
| 5184 |
|
|
JSR LAB_F2FX ; save integer part of FAC1 in temporary integer
|
| 5185 |
|
|
|
| 5186 |
|
|
; scan for "," and get byte, else do Syntax error then warm start
|
| 5187 |
|
|
|
| 5188 |
|
|
LAB_SCGB
|
| 5189 |
|
|
JSR LAB_1C01 ; scan for "," , else do syntax error then warm start
|
| 5190 |
|
|
LDA Itemph ; save temporary integer high byte
|
| 5191 |
|
|
PHA ; on stack
|
| 5192 |
|
|
LDA Itempl ; save temporary integer low byte
|
| 5193 |
|
|
PHA ; on stack
|
| 5194 |
|
|
JSR LAB_GTBY ; get byte parameter
|
| 5195 |
|
|
PLA ; pull low byte
|
| 5196 |
|
|
STA Itempl ; restore temporary integer low byte
|
| 5197 |
|
|
PLA ; pull high byte
|
| 5198 |
|
|
STA Itemph ; restore temporary integer high byte
|
| 5199 |
|
|
RTS
|
| 5200 |
|
|
|
| 5201 |
|
|
; convert float to fixed routine. accepts any value that fits in 24 bits, +ve or
|
| 5202 |
|
|
; -ve and converts it into a right truncated integer in Itempl and Itemph
|
| 5203 |
|
|
|
| 5204 |
|
|
; save unsigned 16 bit integer part of FAC1 in temporary integer
|
| 5205 |
|
|
|
| 5206 |
|
|
LAB_F2FX
|
| 5207 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 5208 |
|
|
CMP #$98 ; compare with exponent = 2^24
|
| 5209 |
|
|
BCS LAB_23A8 ; if >= do function call error then warm start
|
| 5210 |
|
|
|
| 5211 |
|
|
LAB_F2FU
|
| 5212 |
|
|
JSR LAB_2831 ; convert FAC1 floating-to-fixed
|
| 5213 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 5214 |
|
|
LDY FAC1_3 ; get FAC1 mantissa3
|
| 5215 |
|
|
STY Itempl ; save temporary integer low byte
|
| 5216 |
|
|
STA Itemph ; save temporary integer high byte
|
| 5217 |
|
|
RTS
|
| 5218 |
|
|
|
| 5219 |
|
|
; perform PEEK()
|
| 5220 |
|
|
|
| 5221 |
|
|
LAB_PEEK
|
| 5222 |
|
|
JSR LAB_F2FX ; save integer part of FAC1 in temporary integer
|
| 5223 |
|
|
LDX #$00 ; clear index
|
| 5224 |
|
|
LDA (Itempl,X) ; get byte via temporary integer (addr)
|
| 5225 |
|
|
TAY ; copy byte to Y
|
| 5226 |
|
|
JMP LAB_1FD0 ; convert Y to byte in FAC1 and return
|
| 5227 |
|
|
|
| 5228 |
|
|
; perform POKE
|
| 5229 |
|
|
|
| 5230 |
|
|
LAB_POKE
|
| 5231 |
|
|
JSR LAB_GADB ; get two parameters for POKE or WAIT
|
| 5232 |
|
|
TXA ; copy byte argument to A
|
| 5233 |
|
|
LDX #$00 ; clear index
|
| 5234 |
|
|
STA (Itempl,X) ; save byte via temporary integer (addr)
|
| 5235 |
|
|
RTS
|
| 5236 |
|
|
|
| 5237 |
|
|
; perform DEEK()
|
| 5238 |
|
|
|
| 5239 |
|
|
LAB_DEEK
|
| 5240 |
|
|
JSR LAB_F2FX ; save integer part of FAC1 in temporary integer
|
| 5241 |
|
|
LDX #$00 ; clear index
|
| 5242 |
|
|
LDA (Itempl,X) ; PEEK low byte
|
| 5243 |
|
|
TAY ; copy to Y
|
| 5244 |
|
|
INC Itempl ; increment pointer low byte
|
| 5245 |
|
|
BNE Deekh ; skip high increment if no rollover
|
| 5246 |
|
|
|
| 5247 |
|
|
INC Itemph ; increment pointer high byte
|
| 5248 |
|
|
Deekh
|
| 5249 |
|
|
LDA (Itempl,X) ; PEEK high byte
|
| 5250 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 5251 |
|
|
|
| 5252 |
|
|
; perform DOKE
|
| 5253 |
|
|
|
| 5254 |
|
|
LAB_DOKE
|
| 5255 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 5256 |
|
|
; else do type mismatch
|
| 5257 |
|
|
JSR LAB_F2FX ; convert floating-to-fixed
|
| 5258 |
|
|
|
| 5259 |
|
|
STY Frnxtl ; save pointer low byte (float to fixed returns word in AY)
|
| 5260 |
|
|
STA Frnxth ; save pointer high byte
|
| 5261 |
|
|
|
| 5262 |
|
|
JSR LAB_1C01 ; scan for "," , else do syntax error then warm start
|
| 5263 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 5264 |
|
|
; else do type mismatch
|
| 5265 |
|
|
JSR LAB_F2FX ; convert floating-to-fixed
|
| 5266 |
|
|
|
| 5267 |
|
|
TYA ; copy value low byte (float to fixed returns word in AY)
|
| 5268 |
|
|
LDX #$00 ; clear index
|
| 5269 |
|
|
STA (Frnxtl,X) ; POKE low byte
|
| 5270 |
|
|
INC Frnxtl ; increment pointer low byte
|
| 5271 |
|
|
BNE Dokeh ; skip high increment if no rollover
|
| 5272 |
|
|
|
| 5273 |
|
|
INC Frnxth ; increment pointer high byte
|
| 5274 |
|
|
Dokeh
|
| 5275 |
|
|
LDA Itemph ; get value high byte
|
| 5276 |
|
|
STA (Frnxtl,X) ; POKE high byte
|
| 5277 |
|
|
JMP LAB_GBYT ; scan memory and return
|
| 5278 |
|
|
|
| 5279 |
|
|
; perform SWAP
|
| 5280 |
|
|
|
| 5281 |
|
|
LAB_SWAP
|
| 5282 |
|
|
JSR LAB_GVAR ; get var1 address
|
| 5283 |
|
|
STA Lvarpl ; save var1 address low byte
|
| 5284 |
|
|
STY Lvarph ; save var1 address high byte
|
| 5285 |
|
|
LDA Dtypef ; get data type flag, $FF=string, $00=numeric
|
| 5286 |
|
|
PHA ; save data type flag
|
| 5287 |
|
|
|
| 5288 |
|
|
JSR LAB_1C01 ; scan for "," , else do syntax error then warm start
|
| 5289 |
|
|
JSR LAB_GVAR ; get var2 address (pointer in Cvaral/h)
|
| 5290 |
|
|
PLA ; pull var1 data type flag
|
| 5291 |
|
|
EOR Dtypef ; compare with var2 data type
|
| 5292 |
|
|
BPL SwapErr ; exit if not both the same type
|
| 5293 |
|
|
|
| 5294 |
|
|
LDY #$03 ; four bytes to swap (either value or descriptor+1)
|
| 5295 |
|
|
SwapLp
|
| 5296 |
|
|
LDA (Lvarpl),Y ; get byte from var1
|
| 5297 |
|
|
TAX ; save var1 byte
|
| 5298 |
|
|
LDA (Cvaral),Y ; get byte from var2
|
| 5299 |
|
|
STA (Lvarpl),Y ; save byte to var1
|
| 5300 |
|
|
TXA ; restore var1 byte
|
| 5301 |
|
|
STA (Cvaral),Y ; save byte to var2
|
| 5302 |
|
|
DEY ; decrement index
|
| 5303 |
|
|
BPL SwapLp ; loop until done
|
| 5304 |
|
|
|
| 5305 |
|
|
RTS
|
| 5306 |
|
|
|
| 5307 |
|
|
SwapErr
|
| 5308 |
|
|
JMP LAB_1ABC ; do "Type mismatch" error then warm start
|
| 5309 |
|
|
|
| 5310 |
|
|
; perform CALL
|
| 5311 |
|
|
|
| 5312 |
|
|
LAB_CALL
|
| 5313 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 5314 |
|
|
; else do type mismatch
|
| 5315 |
|
|
JSR LAB_F2FX ; convert floating-to-fixed
|
| 5316 |
|
|
LDA #>CallExit ; set return address high byte
|
| 5317 |
|
|
PHA ; put on stack
|
| 5318 |
|
|
LDA #
|
| 5319 |
|
|
PHA ; put on stack
|
| 5320 |
|
|
JMP (Itempl) ; do indirect jump to user routine
|
| 5321 |
|
|
|
| 5322 |
|
|
; if the called routine exits correctly then it will return to here. this will then get
|
| 5323 |
|
|
; the next byte for the interpreter and return
|
| 5324 |
|
|
|
| 5325 |
|
|
CallExit
|
| 5326 |
|
|
JMP LAB_GBYT ; scan memory and return
|
| 5327 |
|
|
|
| 5328 |
|
|
; perform WAIT
|
| 5329 |
|
|
|
| 5330 |
|
|
LAB_WAIT
|
| 5331 |
|
|
JSR LAB_GADB ; get two parameters for POKE or WAIT
|
| 5332 |
|
|
STX Frnxtl ; save byte
|
| 5333 |
|
|
LDX #$00 ; clear mask
|
| 5334 |
|
|
JSR LAB_GBYT ; scan memory
|
| 5335 |
|
|
BEQ LAB_2441 ; skip if no third argument
|
| 5336 |
|
|
|
| 5337 |
|
|
JSR LAB_SCGB ; scan for "," and get byte, else SN error then warm start
|
| 5338 |
|
|
LAB_2441
|
| 5339 |
|
|
STX Frnxth ; save EOR argument
|
| 5340 |
|
|
LAB_2445
|
| 5341 |
|
|
LDA (Itempl),Y ; get byte via temporary integer (addr)
|
| 5342 |
|
|
EOR Frnxth ; EOR with second argument (mask)
|
| 5343 |
|
|
AND Frnxtl ; AND with first argument (byte)
|
| 5344 |
|
|
BEQ LAB_2445 ; loop if result is zero
|
| 5345 |
|
|
|
| 5346 |
|
|
LAB_244D
|
| 5347 |
|
|
RTS
|
| 5348 |
|
|
|
| 5349 |
|
|
; perform subtraction, FAC1 from (AY)
|
| 5350 |
|
|
|
| 5351 |
|
|
LAB_2455
|
| 5352 |
|
|
JSR LAB_264D ; unpack memory (AY) into FAC2
|
| 5353 |
|
|
|
| 5354 |
|
|
; perform subtraction, FAC1 from FAC2
|
| 5355 |
|
|
|
| 5356 |
|
|
LAB_SUBTRACT
|
| 5357 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 5358 |
|
|
EOR #$FF ; complement it
|
| 5359 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 5360 |
|
|
EOR FAC2_s ; EOR with FAC2 sign (b7)
|
| 5361 |
|
|
STA FAC_sc ; save sign compare (FAC1 EOR FAC2)
|
| 5362 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 5363 |
|
|
JMP LAB_ADD ; go add FAC2 to FAC1
|
| 5364 |
|
|
|
| 5365 |
|
|
; perform addition
|
| 5366 |
|
|
|
| 5367 |
|
|
LAB_2467
|
| 5368 |
|
|
JSR LAB_257B ; shift FACX A times right (>8 shifts)
|
| 5369 |
|
|
BCC LAB_24A8 ;.go subtract mantissas
|
| 5370 |
|
|
|
| 5371 |
|
|
; add 0.5 to FAC1
|
| 5372 |
|
|
|
| 5373 |
|
|
LAB_244E
|
| 5374 |
|
|
LDA #
|
| 5375 |
|
|
LDY #>LAB_2A96 ; set 0.5 pointer high byte
|
| 5376 |
|
|
|
| 5377 |
|
|
; add (AY) to FAC1
|
| 5378 |
|
|
|
| 5379 |
|
|
LAB_246C
|
| 5380 |
|
|
JSR LAB_264D ; unpack memory (AY) into FAC2
|
| 5381 |
|
|
|
| 5382 |
|
|
; add FAC2 to FAC1
|
| 5383 |
|
|
|
| 5384 |
|
|
LAB_ADD
|
| 5385 |
|
|
BNE LAB_2474 ; branch if FAC1 was not zero
|
| 5386 |
|
|
|
| 5387 |
|
|
; copy FAC2 to FAC1
|
| 5388 |
|
|
|
| 5389 |
|
|
LAB_279B
|
| 5390 |
|
|
LDA FAC2_s ; get FAC2 sign (b7)
|
| 5391 |
|
|
|
| 5392 |
|
|
; save FAC1 sign and copy ABS(FAC2) to FAC1
|
| 5393 |
|
|
|
| 5394 |
|
|
LAB_279D
|
| 5395 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 5396 |
|
|
LDX #$04 ; 4 bytes to copy
|
| 5397 |
|
|
LAB_27A1
|
| 5398 |
|
|
LDA FAC1_o,X ; get byte from FAC2,X
|
| 5399 |
|
|
STA FAC1_e-1,X ; save byte at FAC1,X
|
| 5400 |
|
|
DEX ; decrement count
|
| 5401 |
|
|
BNE LAB_27A1 ; loop if not all done
|
| 5402 |
|
|
|
| 5403 |
|
|
STX FAC1_r ; clear FAC1 rounding byte
|
| 5404 |
|
|
RTS
|
| 5405 |
|
|
|
| 5406 |
|
|
; FAC1 is non zero
|
| 5407 |
|
|
LAB_2474
|
| 5408 |
|
|
LDX FAC1_r ; get FAC1 rounding byte
|
| 5409 |
|
|
STX FAC2_r ; save as FAC2 rounding byte
|
| 5410 |
|
|
LDX #FAC2_e ; set index to FAC2 exponent addr
|
| 5411 |
|
|
LDA FAC2_e ; get FAC2 exponent
|
| 5412 |
|
|
LAB_247C
|
| 5413 |
|
|
TAY ; copy exponent
|
| 5414 |
|
|
BEQ LAB_244D ; exit if zero
|
| 5415 |
|
|
|
| 5416 |
|
|
SEC ; set carry for subtract
|
| 5417 |
|
|
SBC FAC1_e ; subtract FAC1 exponent
|
| 5418 |
|
|
BEQ LAB_24A8 ; branch if = (go add mantissa)
|
| 5419 |
|
|
|
| 5420 |
|
|
BCC LAB_2498 ; branch if <
|
| 5421 |
|
|
|
| 5422 |
|
|
; FAC2>FAC1
|
| 5423 |
|
|
STY FAC1_e ; save FAC1 exponent
|
| 5424 |
|
|
LDY FAC2_s ; get FAC2 sign (b7)
|
| 5425 |
|
|
STY FAC1_s ; save FAC1 sign (b7)
|
| 5426 |
|
|
EOR #$FF ; complement A
|
| 5427 |
|
|
ADC #$00 ; +1 (twos complement, carry is set)
|
| 5428 |
|
|
LDY #$00 ; clear Y
|
| 5429 |
|
|
STY FAC2_r ; clear FAC2 rounding byte
|
| 5430 |
|
|
LDX #FAC1_e ; set index to FAC1 exponent addr
|
| 5431 |
|
|
BNE LAB_249C ; branch always
|
| 5432 |
|
|
|
| 5433 |
|
|
LAB_2498
|
| 5434 |
|
|
LDY #$00 ; clear Y
|
| 5435 |
|
|
STY FAC1_r ; clear FAC1 rounding byte
|
| 5436 |
|
|
LAB_249C
|
| 5437 |
|
|
CMP #$F9 ; compare exponent diff with $F9
|
| 5438 |
|
|
BMI LAB_2467 ; branch if range $79-$F8
|
| 5439 |
|
|
|
| 5440 |
|
|
TAY ; copy exponent difference to Y
|
| 5441 |
|
|
LDA FAC1_r ; get FAC1 rounding byte
|
| 5442 |
|
|
LSR PLUS_1,X ; shift FAC? mantissa1
|
| 5443 |
|
|
JSR LAB_2592 ; shift FACX Y times right
|
| 5444 |
|
|
|
| 5445 |
|
|
; exponents are equal now do mantissa subtract
|
| 5446 |
|
|
LAB_24A8
|
| 5447 |
|
|
BIT FAC_sc ; test sign compare (FAC1 EOR FAC2)
|
| 5448 |
|
|
BPL LAB_24F8 ; if = add FAC2 mantissa to FAC1 mantissa and return
|
| 5449 |
|
|
|
| 5450 |
|
|
LDY #FAC1_e ; set index to FAC1 exponent addr
|
| 5451 |
|
|
CPX #FAC2_e ; compare X to FAC2 exponent addr
|
| 5452 |
|
|
BEQ LAB_24B4 ; branch if =
|
| 5453 |
|
|
|
| 5454 |
|
|
LDY #FAC2_e ; else set index to FAC2 exponent addr
|
| 5455 |
|
|
|
| 5456 |
|
|
; subtract smaller from bigger (take sign of bigger)
|
| 5457 |
|
|
LAB_24B4
|
| 5458 |
|
|
SEC ; set carry for subtract
|
| 5459 |
|
|
EOR #$FF ; ones complement A
|
| 5460 |
|
|
ADC FAC2_r ; add FAC2 rounding byte
|
| 5461 |
|
|
STA FAC1_r ; save FAC1 rounding byte
|
| 5462 |
|
|
LDA PLUS_3,Y ; get FACY mantissa3
|
| 5463 |
|
|
SBC PLUS_3,X ; subtract FACX mantissa3
|
| 5464 |
|
|
STA FAC1_3 ; save FAC1 mantissa3
|
| 5465 |
|
|
LDA PLUS_2,Y ; get FACY mantissa2
|
| 5466 |
|
|
SBC PLUS_2,X ; subtract FACX mantissa2
|
| 5467 |
|
|
STA FAC1_2 ; save FAC1 mantissa2
|
| 5468 |
|
|
LDA PLUS_1,Y ; get FACY mantissa1
|
| 5469 |
|
|
SBC PLUS_1,X ; subtract FACX mantissa1
|
| 5470 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 5471 |
|
|
|
| 5472 |
|
|
; do ABS and normalise FAC1
|
| 5473 |
|
|
|
| 5474 |
|
|
LAB_24D0
|
| 5475 |
|
|
BCS LAB_24D5 ; branch if number is +ve
|
| 5476 |
|
|
|
| 5477 |
|
|
JSR LAB_2537 ; negate FAC1
|
| 5478 |
|
|
|
| 5479 |
|
|
; normalise FAC1
|
| 5480 |
|
|
|
| 5481 |
|
|
LAB_24D5
|
| 5482 |
|
|
LDY #$00 ; clear Y
|
| 5483 |
|
|
TYA ; clear A
|
| 5484 |
|
|
CLC ; clear carry for add
|
| 5485 |
|
|
LAB_24D9
|
| 5486 |
|
|
LDX FAC1_1 ; get FAC1 mantissa1
|
| 5487 |
|
|
BNE LAB_251B ; if not zero normalise FAC1
|
| 5488 |
|
|
|
| 5489 |
|
|
LDX FAC1_2 ; get FAC1 mantissa2
|
| 5490 |
|
|
STX FAC1_1 ; save FAC1 mantissa1
|
| 5491 |
|
|
LDX FAC1_3 ; get FAC1 mantissa3
|
| 5492 |
|
|
STX FAC1_2 ; save FAC1 mantissa2
|
| 5493 |
|
|
LDX FAC1_r ; get FAC1 rounding byte
|
| 5494 |
|
|
STX FAC1_3 ; save FAC1 mantissa3
|
| 5495 |
|
|
STY FAC1_r ; clear FAC1 rounding byte
|
| 5496 |
|
|
ADC #$08 ; add x to exponent offset
|
| 5497 |
|
|
CMP #$18 ; compare with $18 (max offset, all bits would be =0)
|
| 5498 |
|
|
BNE LAB_24D9 ; loop if not max
|
| 5499 |
|
|
|
| 5500 |
|
|
; clear FAC1 exponent and sign
|
| 5501 |
|
|
|
| 5502 |
|
|
LAB_24F1
|
| 5503 |
|
|
LDA #$00 ; clear A
|
| 5504 |
|
|
LAB_24F3
|
| 5505 |
|
|
STA FAC1_e ; set FAC1 exponent
|
| 5506 |
|
|
|
| 5507 |
|
|
; save FAC1 sign
|
| 5508 |
|
|
|
| 5509 |
|
|
LAB_24F5
|
| 5510 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 5511 |
|
|
RTS
|
| 5512 |
|
|
|
| 5513 |
|
|
; add FAC2 mantissa to FAC1 mantissa
|
| 5514 |
|
|
|
| 5515 |
|
|
LAB_24F8
|
| 5516 |
|
|
ADC FAC2_r ; add FAC2 rounding byte
|
| 5517 |
|
|
STA FAC1_r ; save FAC1 rounding byte
|
| 5518 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 5519 |
|
|
ADC FAC2_3 ; add FAC2 mantissa3
|
| 5520 |
|
|
STA FAC1_3 ; save FAC1 mantissa3
|
| 5521 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 5522 |
|
|
ADC FAC2_2 ; add FAC2 mantissa2
|
| 5523 |
|
|
STA FAC1_2 ; save FAC1 mantissa2
|
| 5524 |
|
|
LDA FAC1_1 ; get FAC1 mantissa1
|
| 5525 |
|
|
ADC FAC2_1 ; add FAC2 mantissa1
|
| 5526 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 5527 |
|
|
BCS LAB_252A ; if carry then normalise FAC1 for C=1
|
| 5528 |
|
|
|
| 5529 |
|
|
RTS ; else just exit
|
| 5530 |
|
|
|
| 5531 |
|
|
LAB_2511
|
| 5532 |
|
|
ADC #$01 ; add 1 to exponent offset
|
| 5533 |
|
|
ASL FAC1_r ; shift FAC1 rounding byte
|
| 5534 |
|
|
ROL FAC1_3 ; shift FAC1 mantissa3
|
| 5535 |
|
|
ROL FAC1_2 ; shift FAC1 mantissa2
|
| 5536 |
|
|
ROL FAC1_1 ; shift FAC1 mantissa1
|
| 5537 |
|
|
|
| 5538 |
|
|
; normalise FAC1
|
| 5539 |
|
|
|
| 5540 |
|
|
LAB_251B
|
| 5541 |
|
|
BPL LAB_2511 ; loop if not normalised
|
| 5542 |
|
|
|
| 5543 |
|
|
SEC ; set carry for subtract
|
| 5544 |
|
|
SBC FAC1_e ; subtract FAC1 exponent
|
| 5545 |
|
|
BCS LAB_24F1 ; branch if underflow (set result = $0)
|
| 5546 |
|
|
|
| 5547 |
|
|
EOR #$FF ; complement exponent
|
| 5548 |
|
|
ADC #$01 ; +1 (twos complement)
|
| 5549 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 5550 |
|
|
|
| 5551 |
|
|
; test and normalise FAC1 for C=0/1
|
| 5552 |
|
|
|
| 5553 |
|
|
LAB_2528
|
| 5554 |
|
|
BCC LAB_2536 ; exit if no overflow
|
| 5555 |
|
|
|
| 5556 |
|
|
; normalise FAC1 for C=1
|
| 5557 |
|
|
|
| 5558 |
|
|
LAB_252A
|
| 5559 |
|
|
INC FAC1_e ; increment FAC1 exponent
|
| 5560 |
|
|
BEQ LAB_2564 ; if zero do overflow error and warm start
|
| 5561 |
|
|
|
| 5562 |
|
|
ROR FAC1_1 ; shift FAC1 mantissa1
|
| 5563 |
|
|
ROR FAC1_2 ; shift FAC1 mantissa2
|
| 5564 |
|
|
ROR FAC1_3 ; shift FAC1 mantissa3
|
| 5565 |
|
|
ROR FAC1_r ; shift FAC1 rounding byte
|
| 5566 |
|
|
LAB_2536
|
| 5567 |
|
|
RTS
|
| 5568 |
|
|
|
| 5569 |
|
|
; negate FAC1
|
| 5570 |
|
|
|
| 5571 |
|
|
LAB_2537
|
| 5572 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 5573 |
|
|
EOR #$FF ; complement it
|
| 5574 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 5575 |
|
|
|
| 5576 |
|
|
; twos complement FAC1 mantissa
|
| 5577 |
|
|
|
| 5578 |
|
|
LAB_253D
|
| 5579 |
|
|
LDA FAC1_1 ; get FAC1 mantissa1
|
| 5580 |
|
|
EOR #$FF ; complement it
|
| 5581 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 5582 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 5583 |
|
|
EOR #$FF ; complement it
|
| 5584 |
|
|
STA FAC1_2 ; save FAC1 mantissa2
|
| 5585 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 5586 |
|
|
EOR #$FF ; complement it
|
| 5587 |
|
|
STA FAC1_3 ; save FAC1 mantissa3
|
| 5588 |
|
|
LDA FAC1_r ; get FAC1 rounding byte
|
| 5589 |
|
|
EOR #$FF ; complement it
|
| 5590 |
|
|
STA FAC1_r ; save FAC1 rounding byte
|
| 5591 |
|
|
INC FAC1_r ; increment FAC1 rounding byte
|
| 5592 |
|
|
BNE LAB_2563 ; exit if no overflow
|
| 5593 |
|
|
|
| 5594 |
|
|
; increment FAC1 mantissa
|
| 5595 |
|
|
|
| 5596 |
|
|
LAB_2559
|
| 5597 |
|
|
INC FAC1_3 ; increment FAC1 mantissa3
|
| 5598 |
|
|
BNE LAB_2563 ; finished if no rollover
|
| 5599 |
|
|
|
| 5600 |
|
|
INC FAC1_2 ; increment FAC1 mantissa2
|
| 5601 |
|
|
BNE LAB_2563 ; finished if no rollover
|
| 5602 |
|
|
|
| 5603 |
|
|
INC FAC1_1 ; increment FAC1 mantissa1
|
| 5604 |
|
|
LAB_2563
|
| 5605 |
|
|
RTS
|
| 5606 |
|
|
|
| 5607 |
|
|
; do overflow error (overflow exit)
|
| 5608 |
|
|
|
| 5609 |
|
|
LAB_2564
|
| 5610 |
|
|
LDX #$0A ; error code $0A ("Overflow" error)
|
| 5611 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 5612 |
|
|
|
| 5613 |
|
|
; shift FCAtemp << A+8 times
|
| 5614 |
|
|
|
| 5615 |
|
|
LAB_2569
|
| 5616 |
|
|
LDX #FACt_1-1 ; set offset to FACtemp
|
| 5617 |
|
|
LAB_256B
|
| 5618 |
|
|
LDY PLUS_3,X ; get FACX mantissa3
|
| 5619 |
|
|
STY FAC1_r ; save as FAC1 rounding byte
|
| 5620 |
|
|
LDY PLUS_2,X ; get FACX mantissa2
|
| 5621 |
|
|
STY PLUS_3,X ; save FACX mantissa3
|
| 5622 |
|
|
LDY PLUS_1,X ; get FACX mantissa1
|
| 5623 |
|
|
STY PLUS_2,X ; save FACX mantissa2
|
| 5624 |
|
|
LDY FAC1_o ; get FAC1 overflow byte
|
| 5625 |
|
|
STY PLUS_1,X ; save FACX mantissa1
|
| 5626 |
|
|
|
| 5627 |
|
|
; shift FACX -A times right (> 8 shifts)
|
| 5628 |
|
|
|
| 5629 |
|
|
LAB_257B
|
| 5630 |
|
|
ADC #$08 ; add 8 to shift count
|
| 5631 |
|
|
BMI LAB_256B ; go do 8 shift if still -ve
|
| 5632 |
|
|
|
| 5633 |
|
|
BEQ LAB_256B ; go do 8 shift if zero
|
| 5634 |
|
|
|
| 5635 |
|
|
SBC #$08 ; else subtract 8 again
|
| 5636 |
|
|
TAY ; save count to Y
|
| 5637 |
|
|
LDA FAC1_r ; get FAC1 rounding byte
|
| 5638 |
|
|
BCS LAB_259A ;.
|
| 5639 |
|
|
|
| 5640 |
|
|
LAB_2588
|
| 5641 |
|
|
ASL PLUS_1,X ; shift FACX mantissa1
|
| 5642 |
|
|
BCC LAB_258E ; branch if +ve
|
| 5643 |
|
|
|
| 5644 |
|
|
INC PLUS_1,X ; this sets b7 eventually
|
| 5645 |
|
|
LAB_258E
|
| 5646 |
|
|
ROR PLUS_1,X ; shift FACX mantissa1 (correct for ASL)
|
| 5647 |
|
|
ROR PLUS_1,X ; shift FACX mantissa1 (put carry in b7)
|
| 5648 |
|
|
|
| 5649 |
|
|
; shift FACX Y times right
|
| 5650 |
|
|
|
| 5651 |
|
|
LAB_2592
|
| 5652 |
|
|
ROR PLUS_2,X ; shift FACX mantissa2
|
| 5653 |
|
|
ROR PLUS_3,X ; shift FACX mantissa3
|
| 5654 |
|
|
ROR ; shift FACX rounding byte
|
| 5655 |
|
|
INY ; increment exponent diff
|
| 5656 |
|
|
BNE LAB_2588 ; branch if range adjust not complete
|
| 5657 |
|
|
|
| 5658 |
|
|
LAB_259A
|
| 5659 |
|
|
CLC ; just clear it
|
| 5660 |
|
|
RTS
|
| 5661 |
|
|
|
| 5662 |
|
|
; perform LOG()
|
| 5663 |
|
|
|
| 5664 |
|
|
LAB_LOG
|
| 5665 |
|
|
JSR LAB_27CA ; test sign and zero
|
| 5666 |
|
|
BEQ LAB_25C4 ; if zero do function call error then warm start
|
| 5667 |
|
|
|
| 5668 |
|
|
BPL LAB_25C7 ; skip error if +ve
|
| 5669 |
|
|
|
| 5670 |
|
|
LAB_25C4
|
| 5671 |
|
|
JMP LAB_FCER ; do function call error then warm start (-ve)
|
| 5672 |
|
|
|
| 5673 |
|
|
LAB_25C7
|
| 5674 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 5675 |
|
|
SBC #$7F ; normalise it
|
| 5676 |
|
|
PHA ; save it
|
| 5677 |
|
|
LDA #$80 ; set exponent to zero
|
| 5678 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 5679 |
|
|
LDA #
|
| 5680 |
|
|
LDY #>LAB_25AD ; set 1/root2 pointer high byte
|
| 5681 |
|
|
JSR LAB_246C ; add (AY) to FAC1 (1/root2)
|
| 5682 |
|
|
LDA #
|
| 5683 |
|
|
LDY #>LAB_25B1 ; set root2 pointer high byte
|
| 5684 |
|
|
JSR LAB_26CA ; convert AY and do (AY)/FAC1 (root2/(x+(1/root2)))
|
| 5685 |
|
|
LDA #
|
| 5686 |
|
|
LDY #>LAB_259C ; set 1 pointer high byte
|
| 5687 |
|
|
JSR LAB_2455 ; subtract (AY) from FAC1 ((root2/(x+(1/root2)))-1)
|
| 5688 |
|
|
LDA #
|
| 5689 |
|
|
LDY #>LAB_25A0 ; set pointer high byte to counter
|
| 5690 |
|
|
JSR LAB_2B6E ; ^2 then series evaluation
|
| 5691 |
|
|
LDA #
|
| 5692 |
|
|
LDY #>LAB_25B5 ; set -0.5 pointer high byte
|
| 5693 |
|
|
JSR LAB_246C ; add (AY) to FAC1
|
| 5694 |
|
|
PLA ; restore FAC1 exponent
|
| 5695 |
|
|
JSR LAB_2912 ; evaluate new ASCII digit
|
| 5696 |
|
|
LDA #
|
| 5697 |
|
|
LDY #>LAB_25B9 ; set LOG(2) pointer high byte
|
| 5698 |
|
|
|
| 5699 |
|
|
; do convert AY, FCA1*(AY)
|
| 5700 |
|
|
|
| 5701 |
|
|
LAB_25FB
|
| 5702 |
|
|
JSR LAB_264D ; unpack memory (AY) into FAC2
|
| 5703 |
|
|
LAB_MULTIPLY
|
| 5704 |
|
|
BEQ LAB_264C ; exit if zero
|
| 5705 |
|
|
|
| 5706 |
|
|
JSR LAB_2673 ; test and adjust accumulators
|
| 5707 |
|
|
LDA #$00 ; clear A
|
| 5708 |
|
|
STA FACt_1 ; clear temp mantissa1
|
| 5709 |
|
|
STA FACt_2 ; clear temp mantissa2
|
| 5710 |
|
|
STA FACt_3 ; clear temp mantissa3
|
| 5711 |
|
|
LDA FAC1_r ; get FAC1 rounding byte
|
| 5712 |
|
|
JSR LAB_2622 ; go do shift/add FAC2
|
| 5713 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 5714 |
|
|
JSR LAB_2622 ; go do shift/add FAC2
|
| 5715 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 5716 |
|
|
JSR LAB_2622 ; go do shift/add FAC2
|
| 5717 |
|
|
LDA FAC1_1 ; get FAC1 mantissa1
|
| 5718 |
|
|
JSR LAB_2627 ; go do shift/add FAC2
|
| 5719 |
|
|
JMP LAB_273C ; copy temp to FAC1, normalise and return
|
| 5720 |
|
|
|
| 5721 |
|
|
LAB_2622
|
| 5722 |
|
|
BNE LAB_2627 ; branch if byte <> zero
|
| 5723 |
|
|
|
| 5724 |
|
|
JMP LAB_2569 ; shift FCAtemp << A+8 times
|
| 5725 |
|
|
|
| 5726 |
|
|
; else do shift and add
|
| 5727 |
|
|
LAB_2627
|
| 5728 |
|
|
LSR ; shift byte
|
| 5729 |
|
|
ORA #$80 ; set top bit (mark for 8 times)
|
| 5730 |
|
|
LAB_262A
|
| 5731 |
|
|
TAY ; copy result
|
| 5732 |
|
|
BCC LAB_2640 ; skip next if bit was zero
|
| 5733 |
|
|
|
| 5734 |
|
|
CLC ; clear carry for add
|
| 5735 |
|
|
LDA FACt_3 ; get temp mantissa3
|
| 5736 |
|
|
ADC FAC2_3 ; add FAC2 mantissa3
|
| 5737 |
|
|
STA FACt_3 ; save temp mantissa3
|
| 5738 |
|
|
LDA FACt_2 ; get temp mantissa2
|
| 5739 |
|
|
ADC FAC2_2 ; add FAC2 mantissa2
|
| 5740 |
|
|
STA FACt_2 ; save temp mantissa2
|
| 5741 |
|
|
LDA FACt_1 ; get temp mantissa1
|
| 5742 |
|
|
ADC FAC2_1 ; add FAC2 mantissa1
|
| 5743 |
|
|
STA FACt_1 ; save temp mantissa1
|
| 5744 |
|
|
LAB_2640
|
| 5745 |
|
|
ROR FACt_1 ; shift temp mantissa1
|
| 5746 |
|
|
ROR FACt_2 ; shift temp mantissa2
|
| 5747 |
|
|
ROR FACt_3 ; shift temp mantissa3
|
| 5748 |
|
|
ROR FAC1_r ; shift temp rounding byte
|
| 5749 |
|
|
TYA ; get byte back
|
| 5750 |
|
|
LSR ; shift byte
|
| 5751 |
|
|
BNE LAB_262A ; loop if all bits not done
|
| 5752 |
|
|
|
| 5753 |
|
|
LAB_264C
|
| 5754 |
|
|
RTS
|
| 5755 |
|
|
|
| 5756 |
|
|
; unpack memory (AY) into FAC2
|
| 5757 |
|
|
|
| 5758 |
|
|
LAB_264D
|
| 5759 |
|
|
STA ut1_pl ; save pointer low byte
|
| 5760 |
|
|
STY ut1_ph ; save pointer high byte
|
| 5761 |
|
|
LDY #$03 ; 4 bytes to get (0-3)
|
| 5762 |
|
|
LDA (ut1_pl),Y ; get mantissa3
|
| 5763 |
|
|
STA FAC2_3 ; save FAC2 mantissa3
|
| 5764 |
|
|
DEY ; decrement index
|
| 5765 |
|
|
LDA (ut1_pl),Y ; get mantissa2
|
| 5766 |
|
|
STA FAC2_2 ; save FAC2 mantissa2
|
| 5767 |
|
|
DEY ; decrement index
|
| 5768 |
|
|
LDA (ut1_pl),Y ; get mantissa1+sign
|
| 5769 |
|
|
STA FAC2_s ; save FAC2 sign (b7)
|
| 5770 |
|
|
EOR FAC1_s ; EOR with FAC1 sign (b7)
|
| 5771 |
|
|
STA FAC_sc ; save sign compare (FAC1 EOR FAC2)
|
| 5772 |
|
|
LDA FAC2_s ; recover FAC2 sign (b7)
|
| 5773 |
|
|
ORA #$80 ; set 1xxx xxx (set normal bit)
|
| 5774 |
|
|
STA FAC2_1 ; save FAC2 mantissa1
|
| 5775 |
|
|
DEY ; decrement index
|
| 5776 |
|
|
LDA (ut1_pl),Y ; get exponent byte
|
| 5777 |
|
|
STA FAC2_e ; save FAC2 exponent
|
| 5778 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 5779 |
|
|
RTS
|
| 5780 |
|
|
|
| 5781 |
|
|
; test and adjust accumulators
|
| 5782 |
|
|
|
| 5783 |
|
|
LAB_2673
|
| 5784 |
|
|
LDA FAC2_e ; get FAC2 exponent
|
| 5785 |
|
|
LAB_2675
|
| 5786 |
|
|
BEQ LAB_2696 ; branch if FAC2 = $00 (handle underflow)
|
| 5787 |
|
|
|
| 5788 |
|
|
CLC ; clear carry for add
|
| 5789 |
|
|
ADC FAC1_e ; add FAC1 exponent
|
| 5790 |
|
|
BCC LAB_2680 ; branch if sum of exponents <$0100
|
| 5791 |
|
|
|
| 5792 |
|
|
BMI LAB_269B ; do overflow error
|
| 5793 |
|
|
|
| 5794 |
|
|
CLC ; clear carry for the add
|
| 5795 |
|
|
.byte $2C ; makes next line BIT $1410
|
| 5796 |
|
|
LAB_2680
|
| 5797 |
|
|
BPL LAB_2696 ; if +ve go handle underflow
|
| 5798 |
|
|
|
| 5799 |
|
|
ADC #$80 ; adjust exponent
|
| 5800 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 5801 |
|
|
BNE LAB_268B ; branch if not zero
|
| 5802 |
|
|
|
| 5803 |
|
|
JMP LAB_24F5 ; save FAC1 sign and return
|
| 5804 |
|
|
|
| 5805 |
|
|
LAB_268B
|
| 5806 |
|
|
LDA FAC_sc ; get sign compare (FAC1 EOR FAC2)
|
| 5807 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 5808 |
|
|
LAB_268F
|
| 5809 |
|
|
RTS
|
| 5810 |
|
|
|
| 5811 |
|
|
; handle overflow and underflow
|
| 5812 |
|
|
|
| 5813 |
|
|
LAB_2690
|
| 5814 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 5815 |
|
|
BPL LAB_269B ; do overflow error
|
| 5816 |
|
|
|
| 5817 |
|
|
; handle underflow
|
| 5818 |
|
|
LAB_2696
|
| 5819 |
|
|
PLA ; pop return address low byte
|
| 5820 |
|
|
PLA ; pop return address high byte
|
| 5821 |
|
|
JMP LAB_24F1 ; clear FAC1 exponent and sign and return
|
| 5822 |
|
|
|
| 5823 |
|
|
; multiply by 10
|
| 5824 |
|
|
|
| 5825 |
|
|
LAB_269E
|
| 5826 |
|
|
JSR LAB_27AB ; round and copy FAC1 to FAC2
|
| 5827 |
|
|
TAX ; copy exponent (set the flags)
|
| 5828 |
|
|
BEQ LAB_268F ; exit if zero
|
| 5829 |
|
|
|
| 5830 |
|
|
CLC ; clear carry for add
|
| 5831 |
|
|
ADC #$02 ; add two to exponent (*4)
|
| 5832 |
|
|
BCS LAB_269B ; do overflow error if > $FF
|
| 5833 |
|
|
|
| 5834 |
|
|
LDX #$00 ; clear byte
|
| 5835 |
|
|
STX FAC_sc ; clear sign compare (FAC1 EOR FAC2)
|
| 5836 |
|
|
JSR LAB_247C ; add FAC2 to FAC1 (*5)
|
| 5837 |
|
|
INC FAC1_e ; increment FAC1 exponent (*10)
|
| 5838 |
|
|
BNE LAB_268F ; if non zero just do RTS
|
| 5839 |
|
|
|
| 5840 |
|
|
LAB_269B
|
| 5841 |
|
|
JMP LAB_2564 ; do overflow error and warm start
|
| 5842 |
|
|
|
| 5843 |
|
|
; divide by 10
|
| 5844 |
|
|
|
| 5845 |
|
|
LAB_26B9
|
| 5846 |
|
|
JSR LAB_27AB ; round and copy FAC1 to FAC2
|
| 5847 |
|
|
LDA #
|
| 5848 |
|
|
LDY #>LAB_26B5 ; set pointer to 10d high addr
|
| 5849 |
|
|
LDX #$00 ; clear sign
|
| 5850 |
|
|
|
| 5851 |
|
|
; divide by (AY) (X=sign)
|
| 5852 |
|
|
|
| 5853 |
|
|
LAB_26C2
|
| 5854 |
|
|
STX FAC_sc ; save sign compare (FAC1 EOR FAC2)
|
| 5855 |
|
|
JSR LAB_UFAC ; unpack memory (AY) into FAC1
|
| 5856 |
|
|
JMP LAB_DIVIDE ; do FAC2/FAC1
|
| 5857 |
|
|
|
| 5858 |
|
|
; Perform divide-by
|
| 5859 |
|
|
; convert AY and do (AY)/FAC1
|
| 5860 |
|
|
|
| 5861 |
|
|
LAB_26CA
|
| 5862 |
|
|
JSR LAB_264D ; unpack memory (AY) into FAC2
|
| 5863 |
|
|
|
| 5864 |
|
|
; Perform divide-into
|
| 5865 |
|
|
LAB_DIVIDE
|
| 5866 |
|
|
BEQ LAB_2737 ; if zero go do /0 error
|
| 5867 |
|
|
|
| 5868 |
|
|
JSR LAB_27BA ; round FAC1
|
| 5869 |
|
|
LDA #$00 ; clear A
|
| 5870 |
|
|
SEC ; set carry for subtract
|
| 5871 |
|
|
SBC FAC1_e ; subtract FAC1 exponent (2s complement)
|
| 5872 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 5873 |
|
|
JSR LAB_2673 ; test and adjust accumulators
|
| 5874 |
|
|
INC FAC1_e ; increment FAC1 exponent
|
| 5875 |
|
|
BEQ LAB_269B ; if zero do overflow error
|
| 5876 |
|
|
|
| 5877 |
|
|
LDX #$FF ; set index for pre increment
|
| 5878 |
|
|
LDA #$01 ; set bit to flag byte save
|
| 5879 |
|
|
LAB_26E4
|
| 5880 |
|
|
LDY FAC2_1 ; get FAC2 mantissa1
|
| 5881 |
|
|
CPY FAC1_1 ; compare FAC1 mantissa1
|
| 5882 |
|
|
BNE LAB_26F4 ; branch if <>
|
| 5883 |
|
|
|
| 5884 |
|
|
LDY FAC2_2 ; get FAC2 mantissa2
|
| 5885 |
|
|
CPY FAC1_2 ; compare FAC1 mantissa2
|
| 5886 |
|
|
BNE LAB_26F4 ; branch if <>
|
| 5887 |
|
|
|
| 5888 |
|
|
LDY FAC2_3 ; get FAC2 mantissa3
|
| 5889 |
|
|
CPY FAC1_3 ; compare FAC1 mantissa3
|
| 5890 |
|
|
LAB_26F4
|
| 5891 |
|
|
PHP ; save FAC2-FAC1 compare status
|
| 5892 |
|
|
ROL ; shift the result byte
|
| 5893 |
|
|
BCC LAB_2702 ; if no carry skip the byte save
|
| 5894 |
|
|
|
| 5895 |
|
|
LDY #$01 ; set bit to flag byte save
|
| 5896 |
|
|
INX ; else increment the index to FACt
|
| 5897 |
|
|
CPX #$02 ; compare with the index to FACt_3
|
| 5898 |
|
|
BMI LAB_2701 ; if not last byte just go save it
|
| 5899 |
|
|
|
| 5900 |
|
|
BNE LAB_272B ; if all done go save FAC1 rounding byte, normalise and
|
| 5901 |
|
|
; return
|
| 5902 |
|
|
|
| 5903 |
|
|
LDY #$40 ; set bit to flag byte save for the rounding byte
|
| 5904 |
|
|
LAB_2701
|
| 5905 |
|
|
STA FACt_1,X ; write result byte to FACt_1 + index
|
| 5906 |
|
|
TYA ; copy the next save byte flag
|
| 5907 |
|
|
LAB_2702
|
| 5908 |
|
|
PLP ; restore FAC2-FAC1 compare status
|
| 5909 |
|
|
BCC LAB_2704 ; if FAC2 < FAC1 then skip the subtract
|
| 5910 |
|
|
|
| 5911 |
|
|
TAY ; save FAC2-FAC1 compare status
|
| 5912 |
|
|
LDA FAC2_3 ; get FAC2 mantissa3
|
| 5913 |
|
|
SBC FAC1_3 ; subtract FAC1 mantissa3
|
| 5914 |
|
|
STA FAC2_3 ; save FAC2 mantissa3
|
| 5915 |
|
|
LDA FAC2_2 ; get FAC2 mantissa2
|
| 5916 |
|
|
SBC FAC1_2 ; subtract FAC1 mantissa2
|
| 5917 |
|
|
STA FAC2_2 ; save FAC2 mantissa2
|
| 5918 |
|
|
LDA FAC2_1 ; get FAC2 mantissa1
|
| 5919 |
|
|
SBC FAC1_1 ; subtract FAC1 mantissa1
|
| 5920 |
|
|
STA FAC2_1 ; save FAC2 mantissa1
|
| 5921 |
|
|
TYA ; restore FAC2-FAC1 compare status
|
| 5922 |
|
|
|
| 5923 |
|
|
; FAC2 = FAC2*2
|
| 5924 |
|
|
LAB_2704
|
| 5925 |
|
|
ASL FAC2_3 ; shift FAC2 mantissa3
|
| 5926 |
|
|
ROL FAC2_2 ; shift FAC2 mantissa2
|
| 5927 |
|
|
ROL FAC2_1 ; shift FAC2 mantissa1
|
| 5928 |
|
|
BCS LAB_26F4 ; loop with no compare
|
| 5929 |
|
|
|
| 5930 |
|
|
BMI LAB_26E4 ; loop with compare
|
| 5931 |
|
|
|
| 5932 |
|
|
BPL LAB_26F4 ; loop always with no compare
|
| 5933 |
|
|
|
| 5934 |
|
|
; do A<<6, save as FAC1 rounding byte, normalise and return
|
| 5935 |
|
|
|
| 5936 |
|
|
LAB_272B
|
| 5937 |
|
|
LSR ; shift b1 - b0 ..
|
| 5938 |
|
|
ROR ; ..
|
| 5939 |
|
|
ROR ; .. to b7 - b6
|
| 5940 |
|
|
STA FAC1_r ; save FAC1 rounding byte
|
| 5941 |
|
|
PLP ; dump FAC2-FAC1 compare status
|
| 5942 |
|
|
JMP LAB_273C ; copy temp to FAC1, normalise and return
|
| 5943 |
|
|
|
| 5944 |
|
|
; do "Divide by zero" error
|
| 5945 |
|
|
|
| 5946 |
|
|
LAB_2737
|
| 5947 |
|
|
LDX #$14 ; error code $14 ("Divide by zero" error)
|
| 5948 |
|
|
JMP LAB_XERR ; do error #X, then warm start
|
| 5949 |
|
|
|
| 5950 |
|
|
; copy temp to FAC1 and normalise
|
| 5951 |
|
|
|
| 5952 |
|
|
LAB_273C
|
| 5953 |
|
|
LDA FACt_1 ; get temp mantissa1
|
| 5954 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 5955 |
|
|
LDA FACt_2 ; get temp mantissa2
|
| 5956 |
|
|
STA FAC1_2 ; save FAC1 mantissa2
|
| 5957 |
|
|
LDA FACt_3 ; get temp mantissa3
|
| 5958 |
|
|
STA FAC1_3 ; save FAC1 mantissa3
|
| 5959 |
|
|
JMP LAB_24D5 ; normalise FAC1 and return
|
| 5960 |
|
|
|
| 5961 |
|
|
; unpack memory (AY) into FAC1
|
| 5962 |
|
|
|
| 5963 |
|
|
LAB_UFAC
|
| 5964 |
|
|
STA ut1_pl ; save pointer low byte
|
| 5965 |
|
|
STY ut1_ph ; save pointer high byte
|
| 5966 |
|
|
LDY #$03 ; 4 bytes to do
|
| 5967 |
|
|
LDA (ut1_pl),Y ; get last byte
|
| 5968 |
|
|
STA FAC1_3 ; save FAC1 mantissa3
|
| 5969 |
|
|
DEY ; decrement index
|
| 5970 |
|
|
LDA (ut1_pl),Y ; get last-1 byte
|
| 5971 |
|
|
STA FAC1_2 ; save FAC1 mantissa2
|
| 5972 |
|
|
DEY ; decrement index
|
| 5973 |
|
|
LDA (ut1_pl),Y ; get second byte
|
| 5974 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 5975 |
|
|
ORA #$80 ; set 1xxx xxxx (add normal bit)
|
| 5976 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 5977 |
|
|
DEY ; decrement index
|
| 5978 |
|
|
LDA (ut1_pl),Y ; get first byte (exponent)
|
| 5979 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 5980 |
|
|
STY FAC1_r ; clear FAC1 rounding byte
|
| 5981 |
|
|
RTS
|
| 5982 |
|
|
|
| 5983 |
|
|
; pack FAC1 into Adatal
|
| 5984 |
|
|
|
| 5985 |
|
|
LAB_276E
|
| 5986 |
|
|
LDX #
|
| 5987 |
|
|
LAB_2770
|
| 5988 |
|
|
LDY #>Adatal ; set pointer high byte
|
| 5989 |
|
|
BEQ LAB_2778 ; pack FAC1 into (XY) and return
|
| 5990 |
|
|
|
| 5991 |
|
|
; pack FAC1 into (Lvarpl)
|
| 5992 |
|
|
|
| 5993 |
|
|
LAB_PFAC
|
| 5994 |
|
|
LDX Lvarpl ; get destination pointer low byte
|
| 5995 |
|
|
LDY Lvarph ; get destination pointer high byte
|
| 5996 |
|
|
|
| 5997 |
|
|
; pack FAC1 into (XY)
|
| 5998 |
|
|
|
| 5999 |
|
|
LAB_2778
|
| 6000 |
|
|
JSR LAB_27BA ; round FAC1
|
| 6001 |
|
|
STX ut1_pl ; save pointer low byte
|
| 6002 |
|
|
STY ut1_ph ; save pointer high byte
|
| 6003 |
|
|
LDY #$03 ; set index
|
| 6004 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 6005 |
|
|
STA (ut1_pl),Y ; store in destination
|
| 6006 |
|
|
DEY ; decrement index
|
| 6007 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 6008 |
|
|
STA (ut1_pl),Y ; store in destination
|
| 6009 |
|
|
DEY ; decrement index
|
| 6010 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6011 |
|
|
ORA #$7F ; set bits x111 1111
|
| 6012 |
|
|
AND FAC1_1 ; AND in FAC1 mantissa1
|
| 6013 |
|
|
STA (ut1_pl),Y ; store in destination
|
| 6014 |
|
|
DEY ; decrement index
|
| 6015 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6016 |
|
|
STA (ut1_pl),Y ; store in destination
|
| 6017 |
|
|
STY FAC1_r ; clear FAC1 rounding byte
|
| 6018 |
|
|
RTS
|
| 6019 |
|
|
|
| 6020 |
|
|
; round and copy FAC1 to FAC2
|
| 6021 |
|
|
|
| 6022 |
|
|
LAB_27AB
|
| 6023 |
|
|
JSR LAB_27BA ; round FAC1
|
| 6024 |
|
|
|
| 6025 |
|
|
; copy FAC1 to FAC2
|
| 6026 |
|
|
|
| 6027 |
|
|
LAB_27AE
|
| 6028 |
|
|
LDX #$05 ; 5 bytes to copy
|
| 6029 |
|
|
LAB_27B0
|
| 6030 |
|
|
LDA FAC1_e-1,X ; get byte from FAC1,X
|
| 6031 |
|
|
STA FAC1_o,X ; save byte at FAC2,X
|
| 6032 |
|
|
DEX ; decrement count
|
| 6033 |
|
|
BNE LAB_27B0 ; loop if not all done
|
| 6034 |
|
|
|
| 6035 |
|
|
STX FAC1_r ; clear FAC1 rounding byte
|
| 6036 |
|
|
LAB_27B9
|
| 6037 |
|
|
RTS
|
| 6038 |
|
|
|
| 6039 |
|
|
; round FAC1
|
| 6040 |
|
|
|
| 6041 |
|
|
LAB_27BA
|
| 6042 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6043 |
|
|
BEQ LAB_27B9 ; exit if zero
|
| 6044 |
|
|
|
| 6045 |
|
|
ASL FAC1_r ; shift FAC1 rounding byte
|
| 6046 |
|
|
BCC LAB_27B9 ; exit if no overflow
|
| 6047 |
|
|
|
| 6048 |
|
|
; round FAC1 (no check)
|
| 6049 |
|
|
|
| 6050 |
|
|
LAB_27C2
|
| 6051 |
|
|
JSR LAB_2559 ; increment FAC1 mantissa
|
| 6052 |
|
|
BNE LAB_27B9 ; branch if no overflow
|
| 6053 |
|
|
|
| 6054 |
|
|
JMP LAB_252A ; normalise FAC1 for C=1 and return
|
| 6055 |
|
|
|
| 6056 |
|
|
; get FAC1 sign
|
| 6057 |
|
|
; return A=FF,C=1/-ve A=01,C=0/+ve
|
| 6058 |
|
|
|
| 6059 |
|
|
LAB_27CA
|
| 6060 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6061 |
|
|
BEQ LAB_27D7 ; exit if zero (already correct SGN(0)=0)
|
| 6062 |
|
|
|
| 6063 |
|
|
; return A=FF,C=1/-ve A=01,C=0/+ve
|
| 6064 |
|
|
; no = 0 check
|
| 6065 |
|
|
|
| 6066 |
|
|
LAB_27CE
|
| 6067 |
|
|
LDA FAC1_s ; else get FAC1 sign (b7)
|
| 6068 |
|
|
|
| 6069 |
|
|
; return A=FF,C=1/-ve A=01,C=0/+ve
|
| 6070 |
|
|
; no = 0 check, sign in A
|
| 6071 |
|
|
|
| 6072 |
|
|
LAB_27D0
|
| 6073 |
|
|
ROL ; move sign bit to carry
|
| 6074 |
|
|
LDA #$FF ; set byte for -ve result
|
| 6075 |
|
|
BCS LAB_27D7 ; return if sign was set (-ve)
|
| 6076 |
|
|
|
| 6077 |
|
|
LDA #$01 ; else set byte for +ve result
|
| 6078 |
|
|
LAB_27D7
|
| 6079 |
|
|
RTS
|
| 6080 |
|
|
|
| 6081 |
|
|
; perform SGN()
|
| 6082 |
|
|
|
| 6083 |
|
|
LAB_SGN
|
| 6084 |
|
|
JSR LAB_27CA ; get FAC1 sign
|
| 6085 |
|
|
; return A=$FF/-ve A=$01/+ve
|
| 6086 |
|
|
; save A as integer byte
|
| 6087 |
|
|
|
| 6088 |
|
|
LAB_27DB
|
| 6089 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 6090 |
|
|
LDA #$00 ; clear A
|
| 6091 |
|
|
STA FAC1_2 ; clear FAC1 mantissa2
|
| 6092 |
|
|
LDX #$88 ; set exponent
|
| 6093 |
|
|
|
| 6094 |
|
|
; set exp=X, clearFAC1 mantissa3 and normalise
|
| 6095 |
|
|
|
| 6096 |
|
|
LAB_27E3
|
| 6097 |
|
|
LDA FAC1_1 ; get FAC1 mantissa1
|
| 6098 |
|
|
EOR #$FF ; complement it
|
| 6099 |
|
|
ROL ; sign bit into carry
|
| 6100 |
|
|
|
| 6101 |
|
|
; set exp=X, clearFAC1 mantissa3 and normalise
|
| 6102 |
|
|
|
| 6103 |
|
|
LAB_STFA
|
| 6104 |
|
|
LDA #$00 ; clear A
|
| 6105 |
|
|
STA FAC1_3 ; clear FAC1 mantissa3
|
| 6106 |
|
|
STX FAC1_e ; set FAC1 exponent
|
| 6107 |
|
|
STA FAC1_r ; clear FAC1 rounding byte
|
| 6108 |
|
|
STA FAC1_s ; clear FAC1 sign (b7)
|
| 6109 |
|
|
JMP LAB_24D0 ; do ABS and normalise FAC1
|
| 6110 |
|
|
|
| 6111 |
|
|
; perform ABS()
|
| 6112 |
|
|
|
| 6113 |
|
|
LAB_ABS
|
| 6114 |
|
|
LSR FAC1_s ; clear FAC1 sign (put zero in b7)
|
| 6115 |
|
|
RTS
|
| 6116 |
|
|
|
| 6117 |
|
|
; compare FAC1 with (AY)
|
| 6118 |
|
|
; returns A=$00 if FAC1 = (AY)
|
| 6119 |
|
|
; returns A=$01 if FAC1 > (AY)
|
| 6120 |
|
|
; returns A=$FF if FAC1 < (AY)
|
| 6121 |
|
|
|
| 6122 |
|
|
LAB_27F8
|
| 6123 |
|
|
STA ut2_pl ; save pointer low byte
|
| 6124 |
|
|
LAB_27FA
|
| 6125 |
|
|
STY ut2_ph ; save pointer high byte
|
| 6126 |
|
|
LDY #$00 ; clear index
|
| 6127 |
|
|
LDA (ut2_pl),Y ; get exponent
|
| 6128 |
|
|
INY ; increment index
|
| 6129 |
|
|
TAX ; copy (AY) exponent to X
|
| 6130 |
|
|
BEQ LAB_27CA ; branch if (AY) exponent=0 and get FAC1 sign
|
| 6131 |
|
|
; A=FF,C=1/-ve A=01,C=0/+ve
|
| 6132 |
|
|
|
| 6133 |
|
|
LDA (ut2_pl),Y ; get (AY) mantissa1 (with sign)
|
| 6134 |
|
|
EOR FAC1_s ; EOR FAC1 sign (b7)
|
| 6135 |
|
|
BMI LAB_27CE ; if signs <> do return A=FF,C=1/-ve
|
| 6136 |
|
|
; A=01,C=0/+ve and return
|
| 6137 |
|
|
|
| 6138 |
|
|
CPX FAC1_e ; compare (AY) exponent with FAC1 exponent
|
| 6139 |
|
|
BNE LAB_2828 ; branch if different
|
| 6140 |
|
|
|
| 6141 |
|
|
LDA (ut2_pl),Y ; get (AY) mantissa1 (with sign)
|
| 6142 |
|
|
ORA #$80 ; normalise top bit
|
| 6143 |
|
|
CMP FAC1_1 ; compare with FAC1 mantissa1
|
| 6144 |
|
|
BNE LAB_2828 ; branch if different
|
| 6145 |
|
|
|
| 6146 |
|
|
INY ; increment index
|
| 6147 |
|
|
LDA (ut2_pl),Y ; get mantissa2
|
| 6148 |
|
|
CMP FAC1_2 ; compare with FAC1 mantissa2
|
| 6149 |
|
|
BNE LAB_2828 ; branch if different
|
| 6150 |
|
|
|
| 6151 |
|
|
INY ; increment index
|
| 6152 |
|
|
LDA #$7F ; set for 1/2 value rounding byte
|
| 6153 |
|
|
CMP FAC1_r ; compare with FAC1 rounding byte (set carry)
|
| 6154 |
|
|
LDA (ut2_pl),Y ; get mantissa3
|
| 6155 |
|
|
SBC FAC1_3 ; subtract FAC1 mantissa3
|
| 6156 |
|
|
BEQ LAB_2850 ; exit if mantissa3 equal
|
| 6157 |
|
|
|
| 6158 |
|
|
; gets here if number <> FAC1
|
| 6159 |
|
|
|
| 6160 |
|
|
LAB_2828
|
| 6161 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6162 |
|
|
BCC LAB_282E ; branch if FAC1 > (AY)
|
| 6163 |
|
|
|
| 6164 |
|
|
EOR #$FF ; else toggle FAC1 sign
|
| 6165 |
|
|
LAB_282E
|
| 6166 |
|
|
JMP LAB_27D0 ; return A=FF,C=1/-ve A=01,C=0/+ve
|
| 6167 |
|
|
|
| 6168 |
|
|
; convert FAC1 floating-to-fixed
|
| 6169 |
|
|
|
| 6170 |
|
|
LAB_2831
|
| 6171 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6172 |
|
|
BEQ LAB_287F ; if zero go clear FAC1 and return
|
| 6173 |
|
|
|
| 6174 |
|
|
SEC ; set carry for subtract
|
| 6175 |
|
|
SBC #$98 ; subtract maximum integer range exponent
|
| 6176 |
|
|
BIT FAC1_s ; test FAC1 sign (b7)
|
| 6177 |
|
|
BPL LAB_2845 ; branch if FAC1 +ve
|
| 6178 |
|
|
|
| 6179 |
|
|
; FAC1 was -ve
|
| 6180 |
|
|
TAX ; copy subtracted exponent
|
| 6181 |
|
|
LDA #$FF ; overflow for -ve number
|
| 6182 |
|
|
STA FAC1_o ; set FAC1 overflow byte
|
| 6183 |
|
|
JSR LAB_253D ; twos complement FAC1 mantissa
|
| 6184 |
|
|
TXA ; restore subtracted exponent
|
| 6185 |
|
|
LAB_2845
|
| 6186 |
|
|
LDX #FAC1_e ; set index to FAC1
|
| 6187 |
|
|
CMP #$F9 ; compare exponent result
|
| 6188 |
|
|
BPL LAB_2851 ; if < 8 shifts shift FAC1 A times right and return
|
| 6189 |
|
|
|
| 6190 |
|
|
JSR LAB_257B ; shift FAC1 A times right (> 8 shifts)
|
| 6191 |
|
|
STY FAC1_o ; clear FAC1 overflow byte
|
| 6192 |
|
|
LAB_2850
|
| 6193 |
|
|
RTS
|
| 6194 |
|
|
|
| 6195 |
|
|
; shift FAC1 A times right
|
| 6196 |
|
|
|
| 6197 |
|
|
LAB_2851
|
| 6198 |
|
|
TAY ; copy shift count
|
| 6199 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6200 |
|
|
AND #$80 ; mask sign bit only (x000 0000)
|
| 6201 |
|
|
LSR FAC1_1 ; shift FAC1 mantissa1
|
| 6202 |
|
|
ORA FAC1_1 ; OR sign in b7 FAC1 mantissa1
|
| 6203 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 6204 |
|
|
JSR LAB_2592 ; shift FAC1 Y times right
|
| 6205 |
|
|
STY FAC1_o ; clear FAC1 overflow byte
|
| 6206 |
|
|
RTS
|
| 6207 |
|
|
|
| 6208 |
|
|
; perform INT()
|
| 6209 |
|
|
|
| 6210 |
|
|
LAB_INT
|
| 6211 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6212 |
|
|
CMP #$98 ; compare with max int
|
| 6213 |
|
|
BCS LAB_2886 ; exit if >= (already int, too big for fractional part!)
|
| 6214 |
|
|
|
| 6215 |
|
|
JSR LAB_2831 ; convert FAC1 floating-to-fixed
|
| 6216 |
|
|
STY FAC1_r ; save FAC1 rounding byte
|
| 6217 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6218 |
|
|
STY FAC1_s ; save FAC1 sign (b7)
|
| 6219 |
|
|
EOR #$80 ; toggle FAC1 sign
|
| 6220 |
|
|
ROL ; shift into carry
|
| 6221 |
|
|
LDA #$98 ; set new exponent
|
| 6222 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 6223 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 6224 |
|
|
STA Temp3 ; save for EXP() function
|
| 6225 |
|
|
JMP LAB_24D0 ; do ABS and normalise FAC1
|
| 6226 |
|
|
|
| 6227 |
|
|
; clear FAC1 and return
|
| 6228 |
|
|
|
| 6229 |
|
|
LAB_287F
|
| 6230 |
|
|
STA FAC1_1 ; clear FAC1 mantissa1
|
| 6231 |
|
|
STA FAC1_2 ; clear FAC1 mantissa2
|
| 6232 |
|
|
STA FAC1_3 ; clear FAC1 mantissa3
|
| 6233 |
|
|
TAY ; clear Y
|
| 6234 |
|
|
LAB_2886
|
| 6235 |
|
|
RTS
|
| 6236 |
|
|
|
| 6237 |
|
|
; get FAC1 from string
|
| 6238 |
|
|
; this routine now handles hex and binary values from strings
|
| 6239 |
|
|
; starting with "$" and "%" respectively
|
| 6240 |
|
|
|
| 6241 |
|
|
LAB_2887
|
| 6242 |
|
|
LDY #$00 ; clear Y
|
| 6243 |
|
|
STY Dtypef ; clear data type flag, $FF=string, $00=numeric
|
| 6244 |
|
|
LDX #$09 ; set index
|
| 6245 |
|
|
LAB_288B
|
| 6246 |
|
|
STY numexp,X ; clear byte
|
| 6247 |
|
|
DEX ; decrement index
|
| 6248 |
|
|
BPL LAB_288B ; loop until numexp to negnum (and FAC1) = $00
|
| 6249 |
|
|
|
| 6250 |
|
|
BCC LAB_28FE ; branch if 1st character numeric
|
| 6251 |
|
|
|
| 6252 |
|
|
; get FAC1 from string .. first character wasn't numeric
|
| 6253 |
|
|
|
| 6254 |
|
|
CMP #'-' ; else compare with "-"
|
| 6255 |
|
|
BNE LAB_289A ; branch if not "-"
|
| 6256 |
|
|
|
| 6257 |
|
|
STX negnum ; set flag for -ve number (X = $FF)
|
| 6258 |
|
|
BEQ LAB_289C ; branch always (go scan and check for hex/bin)
|
| 6259 |
|
|
|
| 6260 |
|
|
; get FAC1 from string .. first character wasn't numeric or -
|
| 6261 |
|
|
|
| 6262 |
|
|
LAB_289A
|
| 6263 |
|
|
CMP #'+' ; else compare with "+"
|
| 6264 |
|
|
BNE LAB_289D ; branch if not "+" (go check for hex/bin)
|
| 6265 |
|
|
|
| 6266 |
|
|
; was "+" or "-" to start, so get next character
|
| 6267 |
|
|
|
| 6268 |
|
|
LAB_289C
|
| 6269 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 6270 |
|
|
BCC LAB_28FE ; branch if numeric character
|
| 6271 |
|
|
|
| 6272 |
|
|
; code here for hex and binary numbers
|
| 6273 |
|
|
|
| 6274 |
|
|
LAB_289D
|
| 6275 |
|
|
CMP #'$' ; else compare with "$"
|
| 6276 |
|
|
BNE LAB_NHEX ; branch if not "$"
|
| 6277 |
|
|
|
| 6278 |
|
|
JMP LAB_CHEX ; branch if "$"
|
| 6279 |
|
|
|
| 6280 |
|
|
LAB_NHEX
|
| 6281 |
|
|
CMP #'%' ; else compare with "%"
|
| 6282 |
|
|
BNE LAB_28A3 ; branch if not "%" (continue original code)
|
| 6283 |
|
|
|
| 6284 |
|
|
JMP LAB_CBIN ; branch if "%"
|
| 6285 |
|
|
|
| 6286 |
|
|
LAB_289E
|
| 6287 |
|
|
JSR LAB_IGBY ; increment and scan memory (ignore + or get next number)
|
| 6288 |
|
|
LAB_28A1
|
| 6289 |
|
|
BCC LAB_28FE ; branch if numeric character
|
| 6290 |
|
|
|
| 6291 |
|
|
; get FAC1 from string .. character wasn't numeric, -, +, hex or binary
|
| 6292 |
|
|
|
| 6293 |
|
|
LAB_28A3
|
| 6294 |
|
|
CMP #'.' ; else compare with "."
|
| 6295 |
|
|
BEQ LAB_28D5 ; branch if "."
|
| 6296 |
|
|
|
| 6297 |
|
|
; get FAC1 from string .. character wasn't numeric, -, + or .
|
| 6298 |
|
|
|
| 6299 |
|
|
CMP #'E' ; else compare with "E"
|
| 6300 |
|
|
BNE LAB_28DB ; branch if not "E"
|
| 6301 |
|
|
|
| 6302 |
|
|
; was "E" so evaluate exponential part
|
| 6303 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 6304 |
|
|
BCC LAB_28C7 ; branch if numeric character
|
| 6305 |
|
|
|
| 6306 |
|
|
CMP #TK_MINUS ; else compare with token for -
|
| 6307 |
|
|
BEQ LAB_28C2 ; branch if token for -
|
| 6308 |
|
|
|
| 6309 |
|
|
CMP #'-' ; else compare with "-"
|
| 6310 |
|
|
BEQ LAB_28C2 ; branch if "-"
|
| 6311 |
|
|
|
| 6312 |
|
|
CMP #TK_PLUS ; else compare with token for +
|
| 6313 |
|
|
BEQ LAB_28C4 ; branch if token for +
|
| 6314 |
|
|
|
| 6315 |
|
|
CMP #'+' ; else compare with "+"
|
| 6316 |
|
|
BEQ LAB_28C4 ; branch if "+"
|
| 6317 |
|
|
|
| 6318 |
|
|
BNE LAB_28C9 ; branch always
|
| 6319 |
|
|
|
| 6320 |
|
|
LAB_28C2
|
| 6321 |
|
|
ROR expneg ; set exponent -ve flag (C, which=1, into b7)
|
| 6322 |
|
|
LAB_28C4
|
| 6323 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 6324 |
|
|
LAB_28C7
|
| 6325 |
|
|
BCC LAB_2925 ; branch if numeric character
|
| 6326 |
|
|
|
| 6327 |
|
|
LAB_28C9
|
| 6328 |
|
|
BIT expneg ; test exponent -ve flag
|
| 6329 |
|
|
BPL LAB_28DB ; if +ve go evaluate exponent
|
| 6330 |
|
|
|
| 6331 |
|
|
; else do exponent = -exponent
|
| 6332 |
|
|
LDA #$00 ; clear result
|
| 6333 |
|
|
SEC ; set carry for subtract
|
| 6334 |
|
|
SBC expcnt ; subtract exponent byte
|
| 6335 |
|
|
JMP LAB_28DD ; go evaluate exponent
|
| 6336 |
|
|
|
| 6337 |
|
|
LAB_28D5
|
| 6338 |
|
|
ROR numdpf ; set decimal point flag
|
| 6339 |
|
|
BIT numdpf ; test decimal point flag
|
| 6340 |
|
|
BVC LAB_289E ; branch if only one decimal point so far
|
| 6341 |
|
|
|
| 6342 |
|
|
; evaluate exponent
|
| 6343 |
|
|
LAB_28DB
|
| 6344 |
|
|
LDA expcnt ; get exponent count byte
|
| 6345 |
|
|
LAB_28DD
|
| 6346 |
|
|
SEC ; set carry for subtract
|
| 6347 |
|
|
SBC numexp ; subtract numerator exponent
|
| 6348 |
|
|
STA expcnt ; save exponent count byte
|
| 6349 |
|
|
BEQ LAB_28F6 ; branch if no adjustment
|
| 6350 |
|
|
|
| 6351 |
|
|
BPL LAB_28EF ; else if +ve go do FAC1*10^expcnt
|
| 6352 |
|
|
|
| 6353 |
|
|
; else go do FAC1/10^(0-expcnt)
|
| 6354 |
|
|
LAB_28E6
|
| 6355 |
|
|
JSR LAB_26B9 ; divide by 10
|
| 6356 |
|
|
INC expcnt ; increment exponent count byte
|
| 6357 |
|
|
BNE LAB_28E6 ; loop until all done
|
| 6358 |
|
|
|
| 6359 |
|
|
BEQ LAB_28F6 ; branch always
|
| 6360 |
|
|
|
| 6361 |
|
|
LAB_28EF
|
| 6362 |
|
|
JSR LAB_269E ; multiply by 10
|
| 6363 |
|
|
DEC expcnt ; decrement exponent count byte
|
| 6364 |
|
|
BNE LAB_28EF ; loop until all done
|
| 6365 |
|
|
|
| 6366 |
|
|
LAB_28F6
|
| 6367 |
|
|
LDA negnum ; get -ve flag
|
| 6368 |
|
|
BMI LAB_28FB ; if -ve do - FAC1 and return
|
| 6369 |
|
|
|
| 6370 |
|
|
RTS
|
| 6371 |
|
|
|
| 6372 |
|
|
; do - FAC1 and return
|
| 6373 |
|
|
|
| 6374 |
|
|
LAB_28FB
|
| 6375 |
|
|
JMP LAB_GTHAN ; do - FAC1 and return
|
| 6376 |
|
|
|
| 6377 |
|
|
; do unsigned FAC1*10+number
|
| 6378 |
|
|
|
| 6379 |
|
|
LAB_28FE
|
| 6380 |
|
|
PHA ; save character
|
| 6381 |
|
|
BIT numdpf ; test decimal point flag
|
| 6382 |
|
|
BPL LAB_2905 ; skip exponent increment if not set
|
| 6383 |
|
|
|
| 6384 |
|
|
INC numexp ; else increment number exponent
|
| 6385 |
|
|
LAB_2905
|
| 6386 |
|
|
JSR LAB_269E ; multiply FAC1 by 10
|
| 6387 |
|
|
PLA ; restore character
|
| 6388 |
|
|
AND #$0F ; convert to binary
|
| 6389 |
|
|
JSR LAB_2912 ; evaluate new ASCII digit
|
| 6390 |
|
|
JMP LAB_289E ; go do next character
|
| 6391 |
|
|
|
| 6392 |
|
|
; evaluate new ASCII digit
|
| 6393 |
|
|
|
| 6394 |
|
|
LAB_2912
|
| 6395 |
|
|
PHA ; save digit
|
| 6396 |
|
|
JSR LAB_27AB ; round and copy FAC1 to FAC2
|
| 6397 |
|
|
PLA ; restore digit
|
| 6398 |
|
|
JSR LAB_27DB ; save A as integer byte
|
| 6399 |
|
|
LDA FAC2_s ; get FAC2 sign (b7)
|
| 6400 |
|
|
EOR FAC1_s ; toggle with FAC1 sign (b7)
|
| 6401 |
|
|
STA FAC_sc ; save sign compare (FAC1 EOR FAC2)
|
| 6402 |
|
|
LDX FAC1_e ; get FAC1 exponent
|
| 6403 |
|
|
JMP LAB_ADD ; add FAC2 to FAC1 and return
|
| 6404 |
|
|
|
| 6405 |
|
|
; evaluate next character of exponential part of number
|
| 6406 |
|
|
|
| 6407 |
|
|
LAB_2925
|
| 6408 |
|
|
LDA expcnt ; get exponent count byte
|
| 6409 |
|
|
CMP #$0A ; compare with 10 decimal
|
| 6410 |
|
|
BCC LAB_2934 ; branch if less
|
| 6411 |
|
|
|
| 6412 |
|
|
LDA #$64 ; make all -ve exponents = -100 decimal (causes underflow)
|
| 6413 |
|
|
BIT expneg ; test exponent -ve flag
|
| 6414 |
|
|
BMI LAB_2942 ; branch if -ve
|
| 6415 |
|
|
|
| 6416 |
|
|
JMP LAB_2564 ; else do overflow error
|
| 6417 |
|
|
|
| 6418 |
|
|
LAB_2934
|
| 6419 |
|
|
ASL ; * 2
|
| 6420 |
|
|
ASL ; * 4
|
| 6421 |
|
|
ADC expcnt ; * 5
|
| 6422 |
|
|
ASL ; * 10
|
| 6423 |
|
|
LDY #$00 ; set index
|
| 6424 |
|
|
ADC (Bpntrl),Y ; add character (will be $30 too much!)
|
| 6425 |
|
|
SBC #'0'-1 ; convert character to binary
|
| 6426 |
|
|
LAB_2942
|
| 6427 |
|
|
STA expcnt ; save exponent count byte
|
| 6428 |
|
|
JMP LAB_28C4 ; go get next character
|
| 6429 |
|
|
|
| 6430 |
|
|
; print " in line [LINE #]"
|
| 6431 |
|
|
|
| 6432 |
|
|
LAB_2953
|
| 6433 |
|
|
LDA #
|
| 6434 |
|
|
LDY #>LAB_LMSG ; point to " in line " message high byte
|
| 6435 |
|
|
JSR LAB_18C3 ; print null terminated string from memory
|
| 6436 |
|
|
|
| 6437 |
|
|
; print Basic line #
|
| 6438 |
|
|
LDA Clineh ; get current line high byte
|
| 6439 |
|
|
LDX Clinel ; get current line low byte
|
| 6440 |
|
|
|
| 6441 |
|
|
; print XA as unsigned integer
|
| 6442 |
|
|
|
| 6443 |
|
|
LAB_295E
|
| 6444 |
|
|
STA FAC1_1 ; save low byte as FAC1 mantissa1
|
| 6445 |
|
|
STX FAC1_2 ; save high byte as FAC1 mantissa2
|
| 6446 |
|
|
LDX #$90 ; set exponent to 16d bits
|
| 6447 |
|
|
SEC ; set integer is +ve flag
|
| 6448 |
|
|
JSR LAB_STFA ; set exp=X, clearFAC1 mantissa3 and normalise
|
| 6449 |
|
|
LDY #$00 ; clear index
|
| 6450 |
|
|
TYA ; clear A
|
| 6451 |
|
|
JSR LAB_297B ; convert FAC1 to string, skip sign character save
|
| 6452 |
|
|
JMP LAB_18C3 ; print null terminated string from memory and return
|
| 6453 |
|
|
|
| 6454 |
|
|
; convert FAC1 to ASCII string result in (AY)
|
| 6455 |
|
|
; not any more, moved scratchpad to page 0
|
| 6456 |
|
|
|
| 6457 |
|
|
LAB_296E
|
| 6458 |
|
|
LDY #$01 ; set index = 1
|
| 6459 |
|
|
LDA #$20 ; character = " " (assume +ve)
|
| 6460 |
|
|
BIT FAC1_s ; test FAC1 sign (b7)
|
| 6461 |
|
|
BPL LAB_2978 ; branch if +ve
|
| 6462 |
|
|
|
| 6463 |
|
|
LDA #$2D ; else character = "-"
|
| 6464 |
|
|
LAB_2978
|
| 6465 |
|
|
STA Decss,Y ; save leading character (" " or "-")
|
| 6466 |
|
|
LAB_297B
|
| 6467 |
|
|
STA FAC1_s ; clear FAC1 sign (b7)
|
| 6468 |
|
|
STY Sendl ; save index
|
| 6469 |
|
|
INY ; increment index
|
| 6470 |
|
|
LDX FAC1_e ; get FAC1 exponent
|
| 6471 |
|
|
BNE LAB_2989 ; branch if FAC1<>0
|
| 6472 |
|
|
|
| 6473 |
|
|
; exponent was $00 so FAC1 is 0
|
| 6474 |
|
|
LDA #'0' ; set character = "0"
|
| 6475 |
|
|
JMP LAB_2A89 ; save last character, [EOT] and exit
|
| 6476 |
|
|
|
| 6477 |
|
|
; FAC1 is some non zero value
|
| 6478 |
|
|
LAB_2989
|
| 6479 |
|
|
LDA #$00 ; clear (number exponent count)
|
| 6480 |
|
|
CPX #$81 ; compare FAC1 exponent with $81 (>1.00000)
|
| 6481 |
|
|
|
| 6482 |
|
|
BCS LAB_299A ; branch if FAC1=>1
|
| 6483 |
|
|
|
| 6484 |
|
|
; FAC1<1
|
| 6485 |
|
|
LDA #
|
| 6486 |
|
|
LDY #>LAB_294F ; set pointer high byte to 1,000,000
|
| 6487 |
|
|
JSR LAB_25FB ; do convert AY, FCA1*(AY)
|
| 6488 |
|
|
LDA #$FA ; set number exponent count (-6)
|
| 6489 |
|
|
LAB_299A
|
| 6490 |
|
|
STA numexp ; save number exponent count
|
| 6491 |
|
|
LAB_299C
|
| 6492 |
|
|
LDA #
|
| 6493 |
|
|
LDY #>LAB_294B ; set pointer high byte to 999999.4375
|
| 6494 |
|
|
JSR LAB_27F8 ; compare FAC1 with (AY)
|
| 6495 |
|
|
BEQ LAB_29C3 ; exit if FAC1 = (AY)
|
| 6496 |
|
|
|
| 6497 |
|
|
BPL LAB_29B9 ; go do /10 if FAC1 > (AY)
|
| 6498 |
|
|
|
| 6499 |
|
|
; FAC1 < (AY)
|
| 6500 |
|
|
LAB_29A7
|
| 6501 |
|
|
LDA #
|
| 6502 |
|
|
LDY #>LAB_2947 ; set pointer high byte to 99999.9375
|
| 6503 |
|
|
JSR LAB_27F8 ; compare FAC1 with (AY)
|
| 6504 |
|
|
BEQ LAB_29B2 ; branch if FAC1 = (AY) (allow decimal places)
|
| 6505 |
|
|
|
| 6506 |
|
|
BPL LAB_29C0 ; branch if FAC1 > (AY) (no decimal places)
|
| 6507 |
|
|
|
| 6508 |
|
|
; FAC1 <= (AY)
|
| 6509 |
|
|
LAB_29B2
|
| 6510 |
|
|
JSR LAB_269E ; multiply by 10
|
| 6511 |
|
|
DEC numexp ; decrement number exponent count
|
| 6512 |
|
|
BNE LAB_29A7 ; go test again (branch always)
|
| 6513 |
|
|
|
| 6514 |
|
|
LAB_29B9
|
| 6515 |
|
|
JSR LAB_26B9 ; divide by 10
|
| 6516 |
|
|
INC numexp ; increment number exponent count
|
| 6517 |
|
|
BNE LAB_299C ; go test again (branch always)
|
| 6518 |
|
|
|
| 6519 |
|
|
; now we have just the digits to do
|
| 6520 |
|
|
|
| 6521 |
|
|
LAB_29C0
|
| 6522 |
|
|
JSR LAB_244E ; add 0.5 to FAC1 (round FAC1)
|
| 6523 |
|
|
LAB_29C3
|
| 6524 |
|
|
JSR LAB_2831 ; convert FAC1 floating-to-fixed
|
| 6525 |
|
|
LDX #$01 ; set default digits before dp = 1
|
| 6526 |
|
|
LDA numexp ; get number exponent count
|
| 6527 |
|
|
CLC ; clear carry for add
|
| 6528 |
|
|
ADC #$07 ; up to 6 digits before point
|
| 6529 |
|
|
BMI LAB_29D8 ; if -ve then 1 digit before dp
|
| 6530 |
|
|
|
| 6531 |
|
|
CMP #$08 ; A>=8 if n>=1E6
|
| 6532 |
|
|
BCS LAB_29D9 ; branch if >= $08
|
| 6533 |
|
|
|
| 6534 |
|
|
; carry is clear
|
| 6535 |
|
|
ADC #$FF ; take 1 from digit count
|
| 6536 |
|
|
TAX ; copy to A
|
| 6537 |
|
|
LDA #$02 ;.set exponent adjust
|
| 6538 |
|
|
LAB_29D8
|
| 6539 |
|
|
SEC ; set carry for subtract
|
| 6540 |
|
|
LAB_29D9
|
| 6541 |
|
|
SBC #$02 ; -2
|
| 6542 |
|
|
STA expcnt ;.save exponent adjust
|
| 6543 |
|
|
STX numexp ; save digits before dp count
|
| 6544 |
|
|
TXA ; copy to A
|
| 6545 |
|
|
BEQ LAB_29E4 ; branch if no digits before dp
|
| 6546 |
|
|
|
| 6547 |
|
|
BPL LAB_29F7 ; branch if digits before dp
|
| 6548 |
|
|
|
| 6549 |
|
|
LAB_29E4
|
| 6550 |
|
|
LDY Sendl ; get output string index
|
| 6551 |
|
|
LDA #$2E ; character "."
|
| 6552 |
|
|
INY ; increment index
|
| 6553 |
|
|
STA Decss,Y ; save to output string
|
| 6554 |
|
|
TXA ;.
|
| 6555 |
|
|
BEQ LAB_29F5 ;.
|
| 6556 |
|
|
|
| 6557 |
|
|
LDA #'0' ; character "0"
|
| 6558 |
|
|
INY ; increment index
|
| 6559 |
|
|
STA Decss,Y ; save to output string
|
| 6560 |
|
|
LAB_29F5
|
| 6561 |
|
|
STY Sendl ; save output string index
|
| 6562 |
|
|
LAB_29F7
|
| 6563 |
|
|
LDY #$00 ; clear index (point to 100,000)
|
| 6564 |
|
|
LDX #$80 ;
|
| 6565 |
|
|
LAB_29FB
|
| 6566 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 6567 |
|
|
CLC ; clear carry for add
|
| 6568 |
|
|
ADC LAB_2A9C,Y ; add -ve LSB
|
| 6569 |
|
|
STA FAC1_3 ; save FAC1 mantissa3
|
| 6570 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 6571 |
|
|
ADC LAB_2A9B,Y ; add -ve NMSB
|
| 6572 |
|
|
STA FAC1_2 ; save FAC1 mantissa2
|
| 6573 |
|
|
LDA FAC1_1 ; get FAC1 mantissa1
|
| 6574 |
|
|
ADC LAB_2A9A,Y ; add -ve MSB
|
| 6575 |
|
|
STA FAC1_1 ; save FAC1 mantissa1
|
| 6576 |
|
|
INX ;
|
| 6577 |
|
|
BCS LAB_2A18 ;
|
| 6578 |
|
|
|
| 6579 |
|
|
BPL LAB_29FB ; not -ve so try again
|
| 6580 |
|
|
|
| 6581 |
|
|
BMI LAB_2A1A ;
|
| 6582 |
|
|
|
| 6583 |
|
|
LAB_2A18
|
| 6584 |
|
|
BMI LAB_29FB ;
|
| 6585 |
|
|
|
| 6586 |
|
|
LAB_2A1A
|
| 6587 |
|
|
TXA ;
|
| 6588 |
|
|
BCC LAB_2A21 ;
|
| 6589 |
|
|
|
| 6590 |
|
|
EOR #$FF ;
|
| 6591 |
|
|
ADC #$0A ;
|
| 6592 |
|
|
LAB_2A21
|
| 6593 |
|
|
ADC #'0'-1 ; add "0"-1 to result
|
| 6594 |
|
|
INY ; increment index ..
|
| 6595 |
|
|
INY ; .. to next less ..
|
| 6596 |
|
|
INY ; .. power of ten
|
| 6597 |
|
|
STY Cvaral ; save as current var address low byte
|
| 6598 |
|
|
LDY Sendl ; get output string index
|
| 6599 |
|
|
INY ; increment output string index
|
| 6600 |
|
|
TAX ; copy character to X
|
| 6601 |
|
|
AND #$7F ; mask out top bit
|
| 6602 |
|
|
STA Decss,Y ; save to output string
|
| 6603 |
|
|
DEC numexp ; decrement # of characters before the dp
|
| 6604 |
|
|
BNE LAB_2A3B ; branch if still characters to do
|
| 6605 |
|
|
|
| 6606 |
|
|
; else output the point
|
| 6607 |
|
|
LDA #$2E ; character "."
|
| 6608 |
|
|
INY ; increment output string index
|
| 6609 |
|
|
STA Decss,Y ; save to output string
|
| 6610 |
|
|
LAB_2A3B
|
| 6611 |
|
|
STY Sendl ; save output string index
|
| 6612 |
|
|
LDY Cvaral ; get current var address low byte
|
| 6613 |
|
|
TXA ; get character back
|
| 6614 |
|
|
EOR #$FF ;
|
| 6615 |
|
|
AND #$80 ;
|
| 6616 |
|
|
TAX ;
|
| 6617 |
|
|
CPY #$12 ; compare index with max
|
| 6618 |
|
|
BNE LAB_29FB ; loop if not max
|
| 6619 |
|
|
|
| 6620 |
|
|
; now remove trailing zeroes
|
| 6621 |
|
|
LDY Sendl ; get output string index
|
| 6622 |
|
|
LAB_2A4B
|
| 6623 |
|
|
LDA Decss,Y ; get character from output string
|
| 6624 |
|
|
DEY ; decrement output string index
|
| 6625 |
|
|
CMP #'0' ; compare with "0"
|
| 6626 |
|
|
BEQ LAB_2A4B ; loop until non "0" character found
|
| 6627 |
|
|
|
| 6628 |
|
|
CMP #'.' ; compare with "."
|
| 6629 |
|
|
BEQ LAB_2A58 ; branch if was dp
|
| 6630 |
|
|
|
| 6631 |
|
|
; restore last character
|
| 6632 |
|
|
INY ; increment output string index
|
| 6633 |
|
|
LAB_2A58
|
| 6634 |
|
|
LDA #$2B ; character "+"
|
| 6635 |
|
|
LDX expcnt ; get exponent count
|
| 6636 |
|
|
BEQ LAB_2A8C ; if zero go set null terminator and exit
|
| 6637 |
|
|
|
| 6638 |
|
|
; exponent isn't zero so write exponent
|
| 6639 |
|
|
BPL LAB_2A68 ; branch if exponent count +ve
|
| 6640 |
|
|
|
| 6641 |
|
|
LDA #$00 ; clear A
|
| 6642 |
|
|
SEC ; set carry for subtract
|
| 6643 |
|
|
SBC expcnt ; subtract exponent count adjust (convert -ve to +ve)
|
| 6644 |
|
|
TAX ; copy exponent count to X
|
| 6645 |
|
|
LDA #'-' ; character "-"
|
| 6646 |
|
|
LAB_2A68
|
| 6647 |
|
|
STA Decss+2,Y ; save to output string
|
| 6648 |
|
|
LDA #$45 ; character "E"
|
| 6649 |
|
|
STA Decss+1,Y ; save exponent sign to output string
|
| 6650 |
|
|
TXA ; get exponent count back
|
| 6651 |
|
|
LDX #'0'-1 ; one less than "0" character
|
| 6652 |
|
|
SEC ; set carry for subtract
|
| 6653 |
|
|
LAB_2A74
|
| 6654 |
|
|
INX ; increment 10's character
|
| 6655 |
|
|
SBC #$0A ;.subtract 10 from exponent count
|
| 6656 |
|
|
BCS LAB_2A74 ; loop while still >= 0
|
| 6657 |
|
|
|
| 6658 |
|
|
ADC #':' ; add character ":" ($30+$0A, result is 10 less that value)
|
| 6659 |
|
|
STA Decss+4,Y ; save to output string
|
| 6660 |
|
|
TXA ; copy 10's character
|
| 6661 |
|
|
STA Decss+3,Y ; save to output string
|
| 6662 |
|
|
LDA #$00 ; set null terminator
|
| 6663 |
|
|
STA Decss+5,Y ; save to output string
|
| 6664 |
|
|
BEQ LAB_2A91 ; go set string pointer (AY) and exit (branch always)
|
| 6665 |
|
|
|
| 6666 |
|
|
; save last character, [EOT] and exit
|
| 6667 |
|
|
LAB_2A89
|
| 6668 |
|
|
STA Decss,Y ; save last character to output string
|
| 6669 |
|
|
|
| 6670 |
|
|
; set null terminator and exit
|
| 6671 |
|
|
LAB_2A8C
|
| 6672 |
|
|
LDA #$00 ; set null terminator
|
| 6673 |
|
|
STA Decss+1,Y ; save after last character
|
| 6674 |
|
|
|
| 6675 |
|
|
; set string pointer (AY) and exit
|
| 6676 |
|
|
LAB_2A91
|
| 6677 |
|
|
LDA #
|
| 6678 |
|
|
LDY #>Decssp1 ; set result string high pointer
|
| 6679 |
|
|
RTS
|
| 6680 |
|
|
|
| 6681 |
|
|
; perform power function
|
| 6682 |
|
|
|
| 6683 |
|
|
LAB_POWER
|
| 6684 |
|
|
BEQ LAB_EXP ; go do EXP()
|
| 6685 |
|
|
|
| 6686 |
|
|
LDA FAC2_e ; get FAC2 exponent
|
| 6687 |
|
|
BNE LAB_2ABF ; branch if FAC2<>0
|
| 6688 |
|
|
|
| 6689 |
|
|
JMP LAB_24F3 ; clear FAC1 exponent and sign and return
|
| 6690 |
|
|
|
| 6691 |
|
|
LAB_2ABF
|
| 6692 |
|
|
LDX #
|
| 6693 |
|
|
LDY #>func_l ; set destination pointer high byte
|
| 6694 |
|
|
JSR LAB_2778 ; pack FAC1 into (XY)
|
| 6695 |
|
|
LDA FAC2_s ; get FAC2 sign (b7)
|
| 6696 |
|
|
BPL LAB_2AD9 ; branch if FAC2>0
|
| 6697 |
|
|
|
| 6698 |
|
|
; else FAC2 is -ve and can only be raised to an
|
| 6699 |
|
|
; integer power which gives an x +j0 result
|
| 6700 |
|
|
JSR LAB_INT ; perform INT
|
| 6701 |
|
|
LDA #
|
| 6702 |
|
|
LDY #>func_l ; set source pointer high byte
|
| 6703 |
|
|
JSR LAB_27F8 ; compare FAC1 with (AY)
|
| 6704 |
|
|
BNE LAB_2AD9 ; branch if FAC1 <> (AY) to allow Function Call error
|
| 6705 |
|
|
; this will leave FAC1 -ve and cause a Function Call
|
| 6706 |
|
|
; error when LOG() is called
|
| 6707 |
|
|
|
| 6708 |
|
|
TYA ; clear sign b7
|
| 6709 |
|
|
LDY Temp3 ; save mantissa 3 from INT() function as sign in Y
|
| 6710 |
|
|
; for possible later negation, b0
|
| 6711 |
|
|
LAB_2AD9
|
| 6712 |
|
|
JSR LAB_279D ; save FAC1 sign and copy ABS(FAC2) to FAC1
|
| 6713 |
|
|
TYA ; copy sign back ..
|
| 6714 |
|
|
PHA ; .. and save it
|
| 6715 |
|
|
JSR LAB_LOG ; do LOG(n)
|
| 6716 |
|
|
LDA #
|
| 6717 |
|
|
LDY #>garb_l ; set pointer high byte
|
| 6718 |
|
|
JSR LAB_25FB ; do convert AY, FCA1*(AY) (square the value)
|
| 6719 |
|
|
JSR LAB_EXP ; go do EXP(n)
|
| 6720 |
|
|
PLA ; pull sign from stack
|
| 6721 |
|
|
LSR ; b0 is to be tested, shift to Cb
|
| 6722 |
|
|
BCC LAB_2AF9 ; if no bit then exit
|
| 6723 |
|
|
|
| 6724 |
|
|
; Perform negation
|
| 6725 |
|
|
; do - FAC1
|
| 6726 |
|
|
|
| 6727 |
|
|
LAB_GTHAN
|
| 6728 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6729 |
|
|
BEQ LAB_2AF9 ; exit if FAC1_e = $00
|
| 6730 |
|
|
|
| 6731 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6732 |
|
|
EOR #$FF ; complement it
|
| 6733 |
|
|
STA FAC1_s ; save FAC1 sign (b7)
|
| 6734 |
|
|
LAB_2AF9
|
| 6735 |
|
|
RTS
|
| 6736 |
|
|
|
| 6737 |
|
|
; perform EXP() (x^e)
|
| 6738 |
|
|
|
| 6739 |
|
|
LAB_EXP
|
| 6740 |
|
|
LDA #
|
| 6741 |
|
|
LDY #>LAB_2AFA ; set 1.443 pointer high byte
|
| 6742 |
|
|
JSR LAB_25FB ; do convert AY, FCA1*(AY)
|
| 6743 |
|
|
LDA FAC1_r ; get FAC1 rounding byte
|
| 6744 |
|
|
ADC #$50 ; +$50/$100
|
| 6745 |
|
|
BCC LAB_2B2B ; skip rounding if no carry
|
| 6746 |
|
|
|
| 6747 |
|
|
JSR LAB_27C2 ; round FAC1 (no check)
|
| 6748 |
|
|
LAB_2B2B
|
| 6749 |
|
|
STA FAC2_r ; save FAC2 rounding byte
|
| 6750 |
|
|
JSR LAB_27AE ; copy FAC1 to FAC2
|
| 6751 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6752 |
|
|
CMP #$88 ; compare with EXP limit (256d)
|
| 6753 |
|
|
BCC LAB_2B39 ; branch if less
|
| 6754 |
|
|
|
| 6755 |
|
|
LAB_2B36
|
| 6756 |
|
|
JSR LAB_2690 ; handle overflow and underflow
|
| 6757 |
|
|
LAB_2B39
|
| 6758 |
|
|
JSR LAB_INT ; perform INT
|
| 6759 |
|
|
LDA Temp3 ; get mantissa 3 from INT() function
|
| 6760 |
|
|
CLC ; clear carry for add
|
| 6761 |
|
|
ADC #$81 ; normalise +1
|
| 6762 |
|
|
BEQ LAB_2B36 ; if $00 go handle overflow
|
| 6763 |
|
|
|
| 6764 |
|
|
SEC ; set carry for subtract
|
| 6765 |
|
|
SBC #$01 ; now correct for exponent
|
| 6766 |
|
|
PHA ; save FAC2 exponent
|
| 6767 |
|
|
|
| 6768 |
|
|
; swap FAC1 and FAC2
|
| 6769 |
|
|
LDX #$04 ; 4 bytes to do
|
| 6770 |
|
|
LAB_2B49
|
| 6771 |
|
|
LDA FAC2_e,X ; get FAC2,X
|
| 6772 |
|
|
LDY FAC1_e,X ; get FAC1,X
|
| 6773 |
|
|
STA FAC1_e,X ; save FAC1,X
|
| 6774 |
|
|
STY FAC2_e,X ; save FAC2,X
|
| 6775 |
|
|
DEX ; decrement count/index
|
| 6776 |
|
|
BPL LAB_2B49 ; loop if not all done
|
| 6777 |
|
|
|
| 6778 |
|
|
LDA FAC2_r ; get FAC2 rounding byte
|
| 6779 |
|
|
STA FAC1_r ; save as FAC1 rounding byte
|
| 6780 |
|
|
JSR LAB_SUBTRACT ; perform subtraction, FAC2 from FAC1
|
| 6781 |
|
|
JSR LAB_GTHAN ; do - FAC1
|
| 6782 |
|
|
LDA #
|
| 6783 |
|
|
LDY #>LAB_2AFE ; set counter pointer high byte
|
| 6784 |
|
|
JSR LAB_2B84 ; go do series evaluation
|
| 6785 |
|
|
LDA #$00 ; clear A
|
| 6786 |
|
|
STA FAC_sc ; clear sign compare (FAC1 EOR FAC2)
|
| 6787 |
|
|
PLA ;.get saved FAC2 exponent
|
| 6788 |
|
|
JMP LAB_2675 ; test and adjust accumulators and return
|
| 6789 |
|
|
|
| 6790 |
|
|
; ^2 then series evaluation
|
| 6791 |
|
|
|
| 6792 |
|
|
LAB_2B6E
|
| 6793 |
|
|
STA Cptrl ; save count pointer low byte
|
| 6794 |
|
|
STY Cptrh ; save count pointer high byte
|
| 6795 |
|
|
JSR LAB_276E ; pack FAC1 into Adatal
|
| 6796 |
|
|
LDA #
|
| 6797 |
|
|
JSR LAB_25FB ; do convert AY, FCA1*(AY)
|
| 6798 |
|
|
JSR LAB_2B88 ; go do series evaluation
|
| 6799 |
|
|
LDA #
|
| 6800 |
|
|
LDY #>Adatal ; pointer to original # high byte
|
| 6801 |
|
|
JMP LAB_25FB ; do convert AY, FCA1*(AY) and return
|
| 6802 |
|
|
|
| 6803 |
|
|
; series evaluation
|
| 6804 |
|
|
|
| 6805 |
|
|
LAB_2B84
|
| 6806 |
|
|
STA Cptrl ; save count pointer low byte
|
| 6807 |
|
|
STY Cptrh ; save count pointer high byte
|
| 6808 |
|
|
LAB_2B88
|
| 6809 |
|
|
LDX #
|
| 6810 |
|
|
JSR LAB_2770 ; set pointer high byte and pack FAC1 into numexp
|
| 6811 |
|
|
LDA (Cptrl),Y ; get constants count
|
| 6812 |
|
|
STA numcon ; save constants count
|
| 6813 |
|
|
LDY Cptrl ; get count pointer low byte
|
| 6814 |
|
|
INY ; increment it (now constants pointer)
|
| 6815 |
|
|
TYA ; copy it
|
| 6816 |
|
|
BNE LAB_2B97 ; skip next if no overflow
|
| 6817 |
|
|
|
| 6818 |
|
|
INC Cptrh ; else increment high byte
|
| 6819 |
|
|
LAB_2B97
|
| 6820 |
|
|
STA Cptrl ; save low byte
|
| 6821 |
|
|
LDY Cptrh ; get high byte
|
| 6822 |
|
|
LAB_2B9B
|
| 6823 |
|
|
JSR LAB_25FB ; do convert AY, FCA1*(AY)
|
| 6824 |
|
|
LDA Cptrl ; get constants pointer low byte
|
| 6825 |
|
|
LDY Cptrh ; get constants pointer high byte
|
| 6826 |
|
|
CLC ; clear carry for add
|
| 6827 |
|
|
ADC #$04 ; +4 to low pointer (4 bytes per constant)
|
| 6828 |
|
|
BCC LAB_2BA8 ; skip next if no overflow
|
| 6829 |
|
|
|
| 6830 |
|
|
INY ; increment high byte
|
| 6831 |
|
|
LAB_2BA8
|
| 6832 |
|
|
STA Cptrl ; save pointer low byte
|
| 6833 |
|
|
STY Cptrh ; save pointer high byte
|
| 6834 |
|
|
JSR LAB_246C ; add (AY) to FAC1
|
| 6835 |
|
|
LDA #
|
| 6836 |
|
|
LDY #>numexp ; set pointer high byte to partial @ numexp
|
| 6837 |
|
|
DEC numcon ; decrement constants count
|
| 6838 |
|
|
BNE LAB_2B9B ; loop until all done
|
| 6839 |
|
|
|
| 6840 |
|
|
RTS
|
| 6841 |
|
|
|
| 6842 |
|
|
; RND(n), 32 bit Galoise version. make n=0 for 19th next number in sequence or n<>0
|
| 6843 |
|
|
; to get 19th next number in sequence after seed n. This version of the PRNG uses
|
| 6844 |
|
|
; the Galois method and a sample of 65536 bytes produced gives the following values.
|
| 6845 |
|
|
|
| 6846 |
|
|
; Entropy = 7.997442 bits per byte
|
| 6847 |
|
|
; Optimum compression would reduce these 65536 bytes by 0 percent
|
| 6848 |
|
|
|
| 6849 |
|
|
; Chi square distribution for 65536 samples is 232.01, and
|
| 6850 |
|
|
; randomly would exceed this value 75.00 percent of the time
|
| 6851 |
|
|
|
| 6852 |
|
|
; Arithmetic mean value of data bytes is 127.6724, 127.5 would be random
|
| 6853 |
|
|
; Monte Carlo value for Pi is 3.122871269, error 0.60 percent
|
| 6854 |
|
|
; Serial correlation coefficient is -0.000370, totally uncorrelated would be 0.0
|
| 6855 |
|
|
|
| 6856 |
|
|
LAB_RND
|
| 6857 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6858 |
|
|
BEQ NextPRN ; do next random # if zero
|
| 6859 |
|
|
|
| 6860 |
|
|
; else get seed into random number store
|
| 6861 |
|
|
LDX #Rbyte4 ; set PRNG pointer low byte
|
| 6862 |
|
|
LDY #$00 ; set PRNG pointer high byte
|
| 6863 |
|
|
JSR LAB_2778 ; pack FAC1 into (XY)
|
| 6864 |
|
|
NextPRN
|
| 6865 |
|
|
LDX #$AF ; set EOR byte
|
| 6866 |
|
|
LDY #$13 ; do this nineteen times
|
| 6867 |
|
|
LoopPRN
|
| 6868 |
|
|
ASL Rbyte1 ; shift PRNG most significant byte
|
| 6869 |
|
|
ROL Rbyte2 ; shift PRNG middle byte
|
| 6870 |
|
|
ROL Rbyte3 ; shift PRNG least significant byte
|
| 6871 |
|
|
ROL Rbyte4 ; shift PRNG extra byte
|
| 6872 |
|
|
BCC Ninc1 ; branch if bit 32 clear
|
| 6873 |
|
|
|
| 6874 |
|
|
TXA ; set EOR byte
|
| 6875 |
|
|
EOR Rbyte1 ; EOR PRNG extra byte
|
| 6876 |
|
|
STA Rbyte1 ; save new PRNG extra byte
|
| 6877 |
|
|
Ninc1
|
| 6878 |
|
|
DEY ; decrement loop count
|
| 6879 |
|
|
BNE LoopPRN ; loop if not all done
|
| 6880 |
|
|
|
| 6881 |
|
|
LDX #$02 ; three bytes to copy
|
| 6882 |
|
|
CopyPRNG
|
| 6883 |
|
|
LDA Rbyte1,X ; get PRNG byte
|
| 6884 |
|
|
STA FAC1_1,X ; save FAC1 byte
|
| 6885 |
|
|
DEX
|
| 6886 |
|
|
BPL CopyPRNG ; loop if not complete
|
| 6887 |
|
|
|
| 6888 |
|
|
LDA #$80 ; set the exponent
|
| 6889 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 6890 |
|
|
|
| 6891 |
|
|
ASL ; clear A
|
| 6892 |
|
|
STA FAC1_s ; save FAC1 sign
|
| 6893 |
|
|
|
| 6894 |
|
|
JMP LAB_24D5 ; normalise FAC1 and return
|
| 6895 |
|
|
|
| 6896 |
|
|
; perform COS()
|
| 6897 |
|
|
|
| 6898 |
|
|
LAB_COS
|
| 6899 |
|
|
LDA #
|
| 6900 |
|
|
LDY #>LAB_2C78 ; set (pi/2) pointer high byte
|
| 6901 |
|
|
JSR LAB_246C ; add (AY) to FAC1
|
| 6902 |
|
|
|
| 6903 |
|
|
; perform SIN()
|
| 6904 |
|
|
|
| 6905 |
|
|
LAB_SIN
|
| 6906 |
|
|
JSR LAB_27AB ; round and copy FAC1 to FAC2
|
| 6907 |
|
|
LDA #
|
| 6908 |
|
|
LDY #>LAB_2C7C ; set (2*pi) pointer high byte
|
| 6909 |
|
|
LDX FAC2_s ; get FAC2 sign (b7)
|
| 6910 |
|
|
JSR LAB_26C2 ; divide by (AY) (X=sign)
|
| 6911 |
|
|
JSR LAB_27AB ; round and copy FAC1 to FAC2
|
| 6912 |
|
|
JSR LAB_INT ; perform INT
|
| 6913 |
|
|
LDA #$00 ; clear byte
|
| 6914 |
|
|
STA FAC_sc ; clear sign compare (FAC1 EOR FAC2)
|
| 6915 |
|
|
JSR LAB_SUBTRACT ; perform subtraction, FAC2 from FAC1
|
| 6916 |
|
|
LDA #
|
| 6917 |
|
|
LDY #>LAB_2C80 ; set 0.25 pointer high byte
|
| 6918 |
|
|
JSR LAB_2455 ; perform subtraction, (AY) from FAC1
|
| 6919 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6920 |
|
|
PHA ; save FAC1 sign
|
| 6921 |
|
|
BPL LAB_2C35 ; branch if +ve
|
| 6922 |
|
|
|
| 6923 |
|
|
; FAC1 sign was -ve
|
| 6924 |
|
|
JSR LAB_244E ; add 0.5 to FAC1
|
| 6925 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6926 |
|
|
BMI LAB_2C38 ; branch if -ve
|
| 6927 |
|
|
|
| 6928 |
|
|
LDA Cflag ; get comparison evaluation flag
|
| 6929 |
|
|
EOR #$FF ; toggle flag
|
| 6930 |
|
|
STA Cflag ; save comparison evaluation flag
|
| 6931 |
|
|
LAB_2C35
|
| 6932 |
|
|
JSR LAB_GTHAN ; do - FAC1
|
| 6933 |
|
|
LAB_2C38
|
| 6934 |
|
|
LDA #
|
| 6935 |
|
|
LDY #>LAB_2C80 ; set 0.25 pointer high byte
|
| 6936 |
|
|
JSR LAB_246C ; add (AY) to FAC1
|
| 6937 |
|
|
PLA ; restore FAC1 sign
|
| 6938 |
|
|
BPL LAB_2C45 ; branch if was +ve
|
| 6939 |
|
|
|
| 6940 |
|
|
; else correct FAC1
|
| 6941 |
|
|
JSR LAB_GTHAN ; do - FAC1
|
| 6942 |
|
|
LAB_2C45
|
| 6943 |
|
|
LDA #
|
| 6944 |
|
|
LDY #>LAB_2C84 ; set pointer high byte to counter
|
| 6945 |
|
|
JMP LAB_2B6E ; ^2 then series evaluation and return
|
| 6946 |
|
|
|
| 6947 |
|
|
; perform TAN()
|
| 6948 |
|
|
|
| 6949 |
|
|
LAB_TAN
|
| 6950 |
|
|
JSR LAB_276E ; pack FAC1 into Adatal
|
| 6951 |
|
|
LDA #$00 ; clear byte
|
| 6952 |
|
|
STA Cflag ; clear comparison evaluation flag
|
| 6953 |
|
|
JSR LAB_SIN ; go do SIN(n)
|
| 6954 |
|
|
LDX #
|
| 6955 |
|
|
LDY #>func_l ; set sin(n) pointer high byte
|
| 6956 |
|
|
JSR LAB_2778 ; pack FAC1 into (XY)
|
| 6957 |
|
|
LDA #
|
| 6958 |
|
|
LDY #>Adatal ; set n pointer high addr
|
| 6959 |
|
|
JSR LAB_UFAC ; unpack memory (AY) into FAC1
|
| 6960 |
|
|
LDA #$00 ; clear byte
|
| 6961 |
|
|
STA FAC1_s ; clear FAC1 sign (b7)
|
| 6962 |
|
|
LDA Cflag ; get comparison evaluation flag
|
| 6963 |
|
|
JSR LAB_2C74 ; save flag and go do series evaluation
|
| 6964 |
|
|
|
| 6965 |
|
|
LDA #
|
| 6966 |
|
|
LDY #>func_l ; set sin(n) pointer high byte
|
| 6967 |
|
|
JMP LAB_26CA ; convert AY and do (AY)/FAC1
|
| 6968 |
|
|
|
| 6969 |
|
|
LAB_2C74
|
| 6970 |
|
|
PHA ; save comparison evaluation flag
|
| 6971 |
|
|
JMP LAB_2C35 ; go do series evaluation
|
| 6972 |
|
|
|
| 6973 |
|
|
; perform USR()
|
| 6974 |
|
|
|
| 6975 |
|
|
LAB_USR
|
| 6976 |
|
|
JSR Usrjmp ; call user code
|
| 6977 |
|
|
JMP LAB_1BFB ; scan for ")", else do syntax error then warm start
|
| 6978 |
|
|
|
| 6979 |
|
|
; perform ATN()
|
| 6980 |
|
|
|
| 6981 |
|
|
LAB_ATN
|
| 6982 |
|
|
LDA FAC1_s ; get FAC1 sign (b7)
|
| 6983 |
|
|
PHA ; save sign
|
| 6984 |
|
|
BPL LAB_2CA1 ; branch if +ve
|
| 6985 |
|
|
|
| 6986 |
|
|
JSR LAB_GTHAN ; else do - FAC1
|
| 6987 |
|
|
LAB_2CA1
|
| 6988 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 6989 |
|
|
PHA ; push exponent
|
| 6990 |
|
|
CMP #$81 ; compare with 1
|
| 6991 |
|
|
BCC LAB_2CAF ; branch if FAC1<1
|
| 6992 |
|
|
|
| 6993 |
|
|
LDA #
|
| 6994 |
|
|
LDY #>LAB_259C ; set 1 pointer high byte
|
| 6995 |
|
|
JSR LAB_26CA ; convert AY and do (AY)/FAC1
|
| 6996 |
|
|
LAB_2CAF
|
| 6997 |
|
|
LDA #
|
| 6998 |
|
|
LDY #>LAB_2CC9 ; set pointer high byte to counter
|
| 6999 |
|
|
JSR LAB_2B6E ; ^2 then series evaluation
|
| 7000 |
|
|
PLA ; restore old FAC1 exponent
|
| 7001 |
|
|
CMP #$81 ; compare with 1
|
| 7002 |
|
|
BCC LAB_2CC2 ; branch if FAC1<1
|
| 7003 |
|
|
|
| 7004 |
|
|
LDA #
|
| 7005 |
|
|
LDY #>LAB_2C78 ; set (pi/2) pointer high byte
|
| 7006 |
|
|
JSR LAB_2455 ; perform subtraction, (AY) from FAC1
|
| 7007 |
|
|
LAB_2CC2
|
| 7008 |
|
|
PLA ; restore FAC1 sign
|
| 7009 |
|
|
BPL LAB_2D04 ; exit if was +ve
|
| 7010 |
|
|
|
| 7011 |
|
|
JMP LAB_GTHAN ; else do - FAC1 and return
|
| 7012 |
|
|
|
| 7013 |
|
|
; perform BITSET
|
| 7014 |
|
|
|
| 7015 |
|
|
LAB_BITSET
|
| 7016 |
|
|
JSR LAB_GADB ; get two parameters for POKE or WAIT
|
| 7017 |
|
|
CPX #$08 ; only 0 to 7 are allowed
|
| 7018 |
|
|
BCS FCError ; branch if > 7
|
| 7019 |
|
|
|
| 7020 |
|
|
LDA #$00 ; clear A
|
| 7021 |
|
|
SEC ; set the carry
|
| 7022 |
|
|
S_Bits
|
| 7023 |
|
|
ROL ; shift bit
|
| 7024 |
|
|
DEX ; decrement bit number
|
| 7025 |
|
|
BPL S_Bits ; loop if still +ve
|
| 7026 |
|
|
|
| 7027 |
|
|
INX ; make X = $00
|
| 7028 |
|
|
ORA (Itempl,X) ; or with byte via temporary integer (addr)
|
| 7029 |
|
|
STA (Itempl,X) ; save byte via temporary integer (addr)
|
| 7030 |
|
|
LAB_2D04
|
| 7031 |
|
|
RTS
|
| 7032 |
|
|
|
| 7033 |
|
|
; perform BITCLR
|
| 7034 |
|
|
|
| 7035 |
|
|
LAB_BITCLR
|
| 7036 |
|
|
JSR LAB_GADB ; get two parameters for POKE or WAIT
|
| 7037 |
|
|
CPX #$08 ; only 0 to 7 are allowed
|
| 7038 |
|
|
BCS FCError ; branch if > 7
|
| 7039 |
|
|
|
| 7040 |
|
|
LDA #$FF ; set A
|
| 7041 |
|
|
S_Bitc
|
| 7042 |
|
|
ROL ; shift bit
|
| 7043 |
|
|
DEX ; decrement bit number
|
| 7044 |
|
|
BPL S_Bitc ; loop if still +ve
|
| 7045 |
|
|
|
| 7046 |
|
|
INX ; make X = $00
|
| 7047 |
|
|
AND (Itempl,X) ; and with byte via temporary integer (addr)
|
| 7048 |
|
|
STA (Itempl,X) ; save byte via temporary integer (addr)
|
| 7049 |
|
|
RTS
|
| 7050 |
|
|
|
| 7051 |
|
|
FCError
|
| 7052 |
|
|
JMP LAB_FCER ; do function call error then warm start
|
| 7053 |
|
|
|
| 7054 |
|
|
; perform BITTST()
|
| 7055 |
|
|
|
| 7056 |
|
|
LAB_BTST
|
| 7057 |
|
|
JSR LAB_IGBY ; increment BASIC pointer
|
| 7058 |
|
|
JSR LAB_GADB ; get two parameters for POKE or WAIT
|
| 7059 |
|
|
CPX #$08 ; only 0 to 7 are allowed
|
| 7060 |
|
|
BCS FCError ; branch if > 7
|
| 7061 |
|
|
|
| 7062 |
|
|
JSR LAB_GBYT ; get next BASIC byte
|
| 7063 |
|
|
CMP #')' ; is next character ")"
|
| 7064 |
|
|
BEQ TST_OK ; if ")" go do rest of function
|
| 7065 |
|
|
|
| 7066 |
|
|
JMP LAB_SNER ; do syntax error then warm start
|
| 7067 |
|
|
|
| 7068 |
|
|
TST_OK
|
| 7069 |
|
|
JSR LAB_IGBY ; update BASIC execute pointer (to character past ")")
|
| 7070 |
|
|
LDA #$00 ; clear A
|
| 7071 |
|
|
SEC ; set the carry
|
| 7072 |
|
|
T_Bits
|
| 7073 |
|
|
ROL ; shift bit
|
| 7074 |
|
|
DEX ; decrement bit number
|
| 7075 |
|
|
BPL T_Bits ; loop if still +ve
|
| 7076 |
|
|
|
| 7077 |
|
|
INX ; make X = $00
|
| 7078 |
|
|
AND (Itempl,X) ; AND with byte via temporary integer (addr)
|
| 7079 |
|
|
BEQ LAB_NOTT ; branch if zero (already correct)
|
| 7080 |
|
|
|
| 7081 |
|
|
LDA #$FF ; set for -1 result
|
| 7082 |
|
|
LAB_NOTT
|
| 7083 |
|
|
JMP LAB_27DB ; go do SGN tail
|
| 7084 |
|
|
|
| 7085 |
|
|
; perform BIN$()
|
| 7086 |
|
|
|
| 7087 |
|
|
LAB_BINS
|
| 7088 |
|
|
CPX #$19 ; max + 1
|
| 7089 |
|
|
BCS BinFErr ; exit if too big ( > or = )
|
| 7090 |
|
|
|
| 7091 |
|
|
STX TempB ; save # of characters ($00 = leading zero remove)
|
| 7092 |
|
|
LDA #$18 ; need A byte long space
|
| 7093 |
|
|
JSR LAB_MSSP ; make string space A bytes long
|
| 7094 |
|
|
LDY #$17 ; set index
|
| 7095 |
|
|
LDX #$18 ; character count
|
| 7096 |
|
|
NextB1
|
| 7097 |
|
|
LSR nums_1 ; shift highest byte
|
| 7098 |
|
|
ROR nums_2 ; shift middle byte
|
| 7099 |
|
|
ROR nums_3 ; shift lowest byte bit 0 to carry
|
| 7100 |
|
|
TXA ; load with "0"/2
|
| 7101 |
|
|
ROL ; shift in carry
|
| 7102 |
|
|
STA (str_pl),Y ; save to temp string + index
|
| 7103 |
|
|
DEY ; decrement index
|
| 7104 |
|
|
BPL NextB1 ; loop if not done
|
| 7105 |
|
|
|
| 7106 |
|
|
LDA TempB ; get # of characters
|
| 7107 |
|
|
BEQ EndBHS ; branch if truncate
|
| 7108 |
|
|
|
| 7109 |
|
|
TAX ; copy length to X
|
| 7110 |
|
|
SEC ; set carry for add !
|
| 7111 |
|
|
EOR #$FF ; 1's complement
|
| 7112 |
|
|
ADC #$18 ; add 24d
|
| 7113 |
|
|
BEQ GoPr2 ; if zero print whole string
|
| 7114 |
|
|
|
| 7115 |
|
|
BNE GoPr1 ; else go make output string
|
| 7116 |
|
|
|
| 7117 |
|
|
; this is the exit code and is also used by HEX$()
|
| 7118 |
|
|
; truncate string to remove leading "0"s
|
| 7119 |
|
|
|
| 7120 |
|
|
EndBHS
|
| 7121 |
|
|
TAY ; clear index (A=0, X=length here)
|
| 7122 |
|
|
NextB2
|
| 7123 |
|
|
LDA (str_pl),Y ; get character from string
|
| 7124 |
|
|
CMP #'0' ; compare with "0"
|
| 7125 |
|
|
BNE GoPr ; if not "0" then go print string from here
|
| 7126 |
|
|
|
| 7127 |
|
|
DEX ; decrement character count
|
| 7128 |
|
|
BEQ GoPr3 ; if zero then end of string so go print it
|
| 7129 |
|
|
|
| 7130 |
|
|
INY ; else increment index
|
| 7131 |
|
|
BPL NextB2 ; loop always
|
| 7132 |
|
|
|
| 7133 |
|
|
; make fixed length output string - ignore overflows!
|
| 7134 |
|
|
|
| 7135 |
|
|
GoPr3
|
| 7136 |
|
|
INX ; need at least 1 character
|
| 7137 |
|
|
GoPr
|
| 7138 |
|
|
TYA ; copy result
|
| 7139 |
|
|
GoPr1
|
| 7140 |
|
|
CLC ; clear carry for add
|
| 7141 |
|
|
ADC str_pl ; add low address
|
| 7142 |
|
|
STA str_pl ; save low address
|
| 7143 |
|
|
LDA #$00 ; do high byte
|
| 7144 |
|
|
ADC str_ph ; add high address
|
| 7145 |
|
|
STA str_ph ; save high address
|
| 7146 |
|
|
GoPr2
|
| 7147 |
|
|
STX str_ln ; X holds string length
|
| 7148 |
|
|
JSR LAB_IGBY ; update BASIC execute pointer (to character past ")")
|
| 7149 |
|
|
JMP LAB_RTST ; check for space on descriptor stack then put address
|
| 7150 |
|
|
; and length on descriptor stack and update stack pointers
|
| 7151 |
|
|
|
| 7152 |
|
|
BinFErr
|
| 7153 |
|
|
JMP LAB_FCER ; do function call error then warm start
|
| 7154 |
|
|
|
| 7155 |
|
|
; perform HEX$()
|
| 7156 |
|
|
|
| 7157 |
|
|
LAB_HEXS
|
| 7158 |
|
|
CPX #$07 ; max + 1
|
| 7159 |
|
|
BCS BinFErr ; exit if too big ( > or = )
|
| 7160 |
|
|
|
| 7161 |
|
|
STX TempB ; save # of characters
|
| 7162 |
|
|
|
| 7163 |
|
|
LDA #$06 ; need 6 bytes for string
|
| 7164 |
|
|
JSR LAB_MSSP ; make string space A bytes long
|
| 7165 |
|
|
LDY #$05 ; set string index
|
| 7166 |
|
|
|
| 7167 |
|
|
SED ; need decimal mode for nibble convert
|
| 7168 |
|
|
LDA nums_3 ; get lowest byte
|
| 7169 |
|
|
JSR LAB_A2HX ; convert A to ASCII hex byte and output
|
| 7170 |
|
|
LDA nums_2 ; get middle byte
|
| 7171 |
|
|
JSR LAB_A2HX ; convert A to ASCII hex byte and output
|
| 7172 |
|
|
LDA nums_1 ; get highest byte
|
| 7173 |
|
|
JSR LAB_A2HX ; convert A to ASCII hex byte and output
|
| 7174 |
|
|
CLD ; back to binary
|
| 7175 |
|
|
|
| 7176 |
|
|
LDX #$06 ; character count
|
| 7177 |
|
|
LDA TempB ; get # of characters
|
| 7178 |
|
|
BEQ EndBHS ; branch if truncate
|
| 7179 |
|
|
|
| 7180 |
|
|
TAX ; copy length to X
|
| 7181 |
|
|
SEC ; set carry for add !
|
| 7182 |
|
|
EOR #$FF ; 1's complement
|
| 7183 |
|
|
ADC #$06 ; add 6d
|
| 7184 |
|
|
BEQ GoPr2 ; if zero print whole string
|
| 7185 |
|
|
|
| 7186 |
|
|
BNE GoPr1 ; else go make output string (branch always)
|
| 7187 |
|
|
|
| 7188 |
|
|
; convert A to ASCII hex byte and output .. note set decimal mode before calling
|
| 7189 |
|
|
|
| 7190 |
|
|
LAB_A2HX
|
| 7191 |
|
|
TAX ; save byte
|
| 7192 |
|
|
AND #$0F ; mask off top bits
|
| 7193 |
|
|
JSR LAB_AL2X ; convert low nibble to ASCII and output
|
| 7194 |
|
|
TXA ; get byte back
|
| 7195 |
|
|
LSR ; /2 shift high nibble to low nibble
|
| 7196 |
|
|
LSR ; /4
|
| 7197 |
|
|
LSR ; /8
|
| 7198 |
|
|
LSR ; /16
|
| 7199 |
|
|
LAB_AL2X
|
| 7200 |
|
|
CMP #$0A ; set carry for +1 if >9
|
| 7201 |
|
|
ADC #'0' ; add ASCII "0"
|
| 7202 |
|
|
STA (str_pl),Y ; save to temp string
|
| 7203 |
|
|
DEY ; decrement counter
|
| 7204 |
|
|
RTS
|
| 7205 |
|
|
|
| 7206 |
|
|
LAB_NLTO
|
| 7207 |
|
|
STA FAC1_e ; save FAC1 exponent
|
| 7208 |
|
|
LDA #$00 ; clear sign compare
|
| 7209 |
|
|
LAB_MLTE
|
| 7210 |
|
|
STA FAC_sc ; save sign compare (FAC1 EOR FAC2)
|
| 7211 |
|
|
TXA ; restore character
|
| 7212 |
|
|
JSR LAB_2912 ; evaluate new ASCII digit
|
| 7213 |
|
|
|
| 7214 |
|
|
; gets here if the first character was "$" for hex
|
| 7215 |
|
|
; get hex number
|
| 7216 |
|
|
|
| 7217 |
|
|
LAB_CHEX
|
| 7218 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 7219 |
|
|
BCC LAB_ISHN ; branch if numeric character
|
| 7220 |
|
|
|
| 7221 |
|
|
ORA #$20 ; case convert, allow "A" to "F" and "a" to "f"
|
| 7222 |
|
|
SBC #'a' ; subtract "a" (carry set here)
|
| 7223 |
|
|
CMP #$06 ; compare normalised with $06 (max+1)
|
| 7224 |
|
|
BCS LAB_EXCH ; exit if >"f" or <"0"
|
| 7225 |
|
|
|
| 7226 |
|
|
ADC #$0A ; convert to nibble
|
| 7227 |
|
|
LAB_ISHN
|
| 7228 |
|
|
AND #$0F ; convert to binary
|
| 7229 |
|
|
TAX ; save nibble
|
| 7230 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 7231 |
|
|
BEQ LAB_MLTE ; skip multiply if zero
|
| 7232 |
|
|
|
| 7233 |
|
|
ADC #$04 ; add four to exponent (*16 - carry clear here)
|
| 7234 |
|
|
BCC LAB_NLTO ; if no overflow do evaluate digit
|
| 7235 |
|
|
|
| 7236 |
|
|
LAB_MLTO
|
| 7237 |
|
|
JMP LAB_2564 ; do overflow error and warm start
|
| 7238 |
|
|
|
| 7239 |
|
|
LAB_NXCH
|
| 7240 |
|
|
TAX ; save bit
|
| 7241 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 7242 |
|
|
BEQ LAB_MLBT ; skip multiply if zero
|
| 7243 |
|
|
|
| 7244 |
|
|
INC FAC1_e ; increment FAC1 exponent (*2)
|
| 7245 |
|
|
BEQ LAB_MLTO ; do overflow error if = $00
|
| 7246 |
|
|
|
| 7247 |
|
|
LDA #$00 ; clear sign compare
|
| 7248 |
|
|
LAB_MLBT
|
| 7249 |
|
|
STA FAC_sc ; save sign compare (FAC1 EOR FAC2)
|
| 7250 |
|
|
TXA ; restore bit
|
| 7251 |
|
|
JSR LAB_2912 ; evaluate new ASCII digit
|
| 7252 |
|
|
|
| 7253 |
|
|
; gets here if the first character was "%" for binary
|
| 7254 |
|
|
; get binary number
|
| 7255 |
|
|
|
| 7256 |
|
|
LAB_CBIN
|
| 7257 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 7258 |
|
|
EOR #'0' ; convert "0" to 0 etc.
|
| 7259 |
|
|
CMP #$02 ; compare with max+1
|
| 7260 |
|
|
BCC LAB_NXCH ; branch exit if < 2
|
| 7261 |
|
|
|
| 7262 |
|
|
LAB_EXCH
|
| 7263 |
|
|
JMP LAB_28F6 ; evaluate -ve flag and return
|
| 7264 |
|
|
|
| 7265 |
|
|
; ctrl-c check routine. includes limited "life" byte save for INGET routine
|
| 7266 |
|
|
; now also the code that checks to see if an interrupt has occurred
|
| 7267 |
|
|
|
| 7268 |
|
|
CTRLC
|
| 7269 |
|
|
LDA ccflag ; get [CTRL-C] check flag
|
| 7270 |
|
|
BNE LAB_FBA2 ; exit if inhibited
|
| 7271 |
|
|
|
| 7272 |
|
|
JSR V_INPT ; scan input device
|
| 7273 |
|
|
BCC LAB_FBA0 ; exit if buffer empty
|
| 7274 |
|
|
|
| 7275 |
|
|
STA ccbyte ; save received byte
|
| 7276 |
|
|
LDX #$20 ; "life" timer for bytes
|
| 7277 |
|
|
STX ccnull ; set countdown
|
| 7278 |
|
|
JMP LAB_1636 ; return to BASIC
|
| 7279 |
|
|
|
| 7280 |
|
|
LAB_FBA0
|
| 7281 |
|
|
LDX ccnull ; get countdown byte
|
| 7282 |
|
|
BEQ LAB_FBA2 ; exit if finished
|
| 7283 |
|
|
|
| 7284 |
|
|
DEC ccnull ; else decrement countdown
|
| 7285 |
|
|
LAB_FBA2
|
| 7286 |
|
|
LDX #NmiBase ; set pointer to NMI values
|
| 7287 |
|
|
JSR LAB_CKIN ; go check interrupt
|
| 7288 |
|
|
LDX #IrqBase ; set pointer to IRQ values
|
| 7289 |
|
|
JSR LAB_CKIN ; go check interrupt
|
| 7290 |
|
|
LAB_CRTS
|
| 7291 |
|
|
RTS
|
| 7292 |
|
|
|
| 7293 |
|
|
; check whichever interrupt is indexed by X
|
| 7294 |
|
|
|
| 7295 |
|
|
LAB_CKIN
|
| 7296 |
|
|
LDA PLUS_0,X ; get interrupt flag byte
|
| 7297 |
|
|
BPL LAB_CRTS ; branch if interrupt not enabled
|
| 7298 |
|
|
|
| 7299 |
|
|
; we disable the interrupt here and make two new commands RETIRQ and RETNMI to
|
| 7300 |
|
|
; automatically enable the interrupt when we exit
|
| 7301 |
|
|
|
| 7302 |
|
|
ASL ; move happened bit to setup bit
|
| 7303 |
|
|
AND #$40 ; mask happened bits
|
| 7304 |
|
|
BEQ LAB_CRTS ; if no interrupt then exit
|
| 7305 |
|
|
|
| 7306 |
|
|
STA PLUS_0,X ; save interrupt flag byte
|
| 7307 |
|
|
|
| 7308 |
|
|
TXA ; copy index ..
|
| 7309 |
|
|
TAY ; .. to Y
|
| 7310 |
|
|
|
| 7311 |
|
|
PLA ; dump return address low byte, call from CTRL-C
|
| 7312 |
|
|
PLA ; dump return address high byte
|
| 7313 |
|
|
|
| 7314 |
|
|
LDA #$05 ; need 5 bytes for GOSUB
|
| 7315 |
|
|
JSR LAB_1212 ; check room on stack for A bytes
|
| 7316 |
|
|
LDA Bpntrh ; get BASIC execute pointer high byte
|
| 7317 |
|
|
PHA ; push on stack
|
| 7318 |
|
|
LDA Bpntrl ; get BASIC execute pointer low byte
|
| 7319 |
|
|
PHA ; push on stack
|
| 7320 |
|
|
LDA Clineh ; get current line high byte
|
| 7321 |
|
|
PHA ; push on stack
|
| 7322 |
|
|
LDA Clinel ; get current line low byte
|
| 7323 |
|
|
PHA ; push on stack
|
| 7324 |
|
|
LDA #TK_GOSUB ; token for GOSUB
|
| 7325 |
|
|
PHA ; push on stack
|
| 7326 |
|
|
|
| 7327 |
|
|
LDA PLUS_1,Y ; get interrupt code pointer low byte
|
| 7328 |
|
|
STA Bpntrl ; save as BASIC execute pointer low byte
|
| 7329 |
|
|
LDA PLUS_2,Y ; get interrupt code pointer high byte
|
| 7330 |
|
|
STA Bpntrh ; save as BASIC execute pointer high byte
|
| 7331 |
|
|
|
| 7332 |
|
|
JMP LAB_15C2 ; go do interpreter inner loop
|
| 7333 |
|
|
; can't RTS, we used the stack! the RTS from the ctrl-c
|
| 7334 |
|
|
; check will be taken when the RETIRQ/RETNMI/RETURN is
|
| 7335 |
|
|
; executed at the end of the subroutine
|
| 7336 |
|
|
|
| 7337 |
|
|
; get byte from input device, no waiting
|
| 7338 |
|
|
; returns with carry set if byte in A
|
| 7339 |
|
|
|
| 7340 |
|
|
INGET
|
| 7341 |
|
|
JSR V_INPT ; call scan input device
|
| 7342 |
|
|
BCS LAB_FB95 ; if byte go reset timer
|
| 7343 |
|
|
|
| 7344 |
|
|
LDA ccnull ; get countdown
|
| 7345 |
|
|
BEQ LAB_FB96 ; exit if empty
|
| 7346 |
|
|
|
| 7347 |
|
|
LDA ccbyte ; get last received byte
|
| 7348 |
|
|
SEC ; flag we got a byte
|
| 7349 |
|
|
LAB_FB95
|
| 7350 |
|
|
LDX #$00 ; clear X
|
| 7351 |
|
|
STX ccnull ; clear timer because we got a byte
|
| 7352 |
|
|
LAB_FB96
|
| 7353 |
|
|
RTS
|
| 7354 |
|
|
|
| 7355 |
|
|
; these routines only enable the interrupts if the set-up flag is set
|
| 7356 |
|
|
; if not they have no effect
|
| 7357 |
|
|
|
| 7358 |
|
|
; perform IRQ {ON|OFF|CLEAR}
|
| 7359 |
|
|
|
| 7360 |
|
|
LAB_IRQ
|
| 7361 |
|
|
LDX #IrqBase ; set pointer to IRQ values
|
| 7362 |
|
|
.byte $2C ; make next line BIT abs.
|
| 7363 |
|
|
|
| 7364 |
|
|
; perform NMI {ON|OFF|CLEAR}
|
| 7365 |
|
|
|
| 7366 |
|
|
LAB_NMI
|
| 7367 |
|
|
LDX #NmiBase ; set pointer to NMI values
|
| 7368 |
|
|
CMP #TK_ON ; compare with token for ON
|
| 7369 |
|
|
BEQ LAB_INON ; go turn on interrupt
|
| 7370 |
|
|
|
| 7371 |
|
|
CMP #TK_OFF ; compare with token for OFF
|
| 7372 |
|
|
BEQ LAB_IOFF ; go turn off interrupt
|
| 7373 |
|
|
|
| 7374 |
|
|
EOR #TK_CLEAR ; compare with token for CLEAR, A = $00 if = TK_CLEAR
|
| 7375 |
|
|
BEQ LAB_INEX ; go clear interrupt flags and return
|
| 7376 |
|
|
|
| 7377 |
|
|
JMP LAB_SNER ; do syntax error then warm start
|
| 7378 |
|
|
|
| 7379 |
|
|
LAB_IOFF
|
| 7380 |
|
|
LDA #$7F ; clear A
|
| 7381 |
|
|
AND PLUS_0,X ; AND with interrupt setup flag
|
| 7382 |
|
|
BPL LAB_INEX ; go clear interrupt enabled flag and return
|
| 7383 |
|
|
|
| 7384 |
|
|
LAB_INON
|
| 7385 |
|
|
LDA PLUS_0,X ; get interrupt setup flag
|
| 7386 |
|
|
ASL ; Shift bit to enabled flag
|
| 7387 |
|
|
ORA PLUS_0,X ; OR with flag byte
|
| 7388 |
|
|
LAB_INEX
|
| 7389 |
|
|
STA PLUS_0,X ; save interrupt flag byte
|
| 7390 |
|
|
JMP LAB_IGBY ; update BASIC execute pointer and return
|
| 7391 |
|
|
|
| 7392 |
|
|
; these routines set up the pointers and flags for the interrupt routines
|
| 7393 |
|
|
; note that the interrupts are also enabled by these commands
|
| 7394 |
|
|
|
| 7395 |
|
|
; perform ON IRQ
|
| 7396 |
|
|
|
| 7397 |
|
|
LAB_SIRQ
|
| 7398 |
|
|
CLI ; enable interrupts
|
| 7399 |
|
|
LDX #IrqBase ; set pointer to IRQ values
|
| 7400 |
|
|
.byte $2C ; make next line BIT abs.
|
| 7401 |
|
|
|
| 7402 |
|
|
; perform ON NMI
|
| 7403 |
|
|
|
| 7404 |
|
|
LAB_SNMI
|
| 7405 |
|
|
LDX #NmiBase ; set pointer to NMI values
|
| 7406 |
|
|
|
| 7407 |
|
|
STX TempB ; save interrupt pointer
|
| 7408 |
|
|
JSR LAB_IGBY ; increment and scan memory (past token)
|
| 7409 |
|
|
JSR LAB_GFPN ; get fixed-point number into temp integer
|
| 7410 |
|
|
LDA Smeml ; get start of mem low byte
|
| 7411 |
|
|
LDX Smemh ; get start of mem high byte
|
| 7412 |
|
|
JSR LAB_SHLN ; search Basic for temp integer line number from AX
|
| 7413 |
|
|
BCS LAB_LFND ; if carry set go set-up interrupt
|
| 7414 |
|
|
|
| 7415 |
|
|
JMP LAB_16F7 ; else go do "Undefined statement" error and warm start
|
| 7416 |
|
|
|
| 7417 |
|
|
LAB_LFND
|
| 7418 |
|
|
LDX TempB ; get interrupt pointer
|
| 7419 |
|
|
LDA Baslnl ; get pointer low byte
|
| 7420 |
|
|
SBC #$01 ; -1 (carry already set for subtract)
|
| 7421 |
|
|
STA PLUS_1,X ; save as interrupt pointer low byte
|
| 7422 |
|
|
LDA Baslnh ; get pointer high byte
|
| 7423 |
|
|
SBC #$00 ; subtract carry
|
| 7424 |
|
|
STA PLUS_2,X ; save as interrupt pointer high byte
|
| 7425 |
|
|
|
| 7426 |
|
|
LDA #$C0 ; set interrupt enabled/setup bits
|
| 7427 |
|
|
STA PLUS_0,X ; set interrupt flags
|
| 7428 |
|
|
LAB_IRTS
|
| 7429 |
|
|
RTS
|
| 7430 |
|
|
|
| 7431 |
|
|
; return from IRQ service, restores the enabled flag.
|
| 7432 |
|
|
|
| 7433 |
|
|
; perform RETIRQ
|
| 7434 |
|
|
|
| 7435 |
|
|
LAB_RETIRQ
|
| 7436 |
|
|
BNE LAB_IRTS ; exit if following token (to allow syntax error)
|
| 7437 |
|
|
|
| 7438 |
|
|
LDA IrqBase ; get interrupt flags
|
| 7439 |
|
|
ASL ; copy setup to enabled (b7)
|
| 7440 |
|
|
ORA IrqBase ; OR in setup flag
|
| 7441 |
|
|
STA IrqBase ; save enabled flag
|
| 7442 |
|
|
JMP LAB_16E8 ; go do rest of RETURN
|
| 7443 |
|
|
|
| 7444 |
|
|
; return from NMI service, restores the enabled flag.
|
| 7445 |
|
|
|
| 7446 |
|
|
; perform RETNMI
|
| 7447 |
|
|
|
| 7448 |
|
|
LAB_RETNMI
|
| 7449 |
|
|
BNE LAB_IRTS ; exit if following token (to allow syntax error)
|
| 7450 |
|
|
|
| 7451 |
|
|
LDA NmiBase ; get set-up flag
|
| 7452 |
|
|
ASL ; copy setup to enabled (b7)
|
| 7453 |
|
|
ORA NmiBase ; OR in setup flag
|
| 7454 |
|
|
STA NmiBase ; save enabled flag
|
| 7455 |
|
|
JMP LAB_16E8 ; go do rest of RETURN
|
| 7456 |
|
|
|
| 7457 |
|
|
; MAX() MIN() pre process
|
| 7458 |
|
|
|
| 7459 |
|
|
LAB_MMPP
|
| 7460 |
|
|
JSR LAB_EVEZ ; process expression
|
| 7461 |
|
|
JMP LAB_CTNM ; check if source is numeric, else do type mismatch
|
| 7462 |
|
|
|
| 7463 |
|
|
; perform MAX()
|
| 7464 |
|
|
|
| 7465 |
|
|
LAB_MAX
|
| 7466 |
|
|
JSR LAB_PHFA ; push FAC1, evaluate expression,
|
| 7467 |
|
|
; pull FAC2 and compare with FAC1
|
| 7468 |
|
|
BPL LAB_MAX ; branch if no swap to do
|
| 7469 |
|
|
|
| 7470 |
|
|
LDA FAC2_1 ; get FAC2 mantissa1
|
| 7471 |
|
|
ORA #$80 ; set top bit (clear sign from compare)
|
| 7472 |
|
|
STA FAC2_1 ; save FAC2 mantissa1
|
| 7473 |
|
|
JSR LAB_279B ; copy FAC2 to FAC1
|
| 7474 |
|
|
BEQ LAB_MAX ; go do next (branch always)
|
| 7475 |
|
|
|
| 7476 |
|
|
; perform MIN()
|
| 7477 |
|
|
|
| 7478 |
|
|
LAB_MIN
|
| 7479 |
|
|
JSR LAB_PHFA ; push FAC1, evaluate expression,
|
| 7480 |
|
|
; pull FAC2 and compare with FAC1
|
| 7481 |
|
|
BMI LAB_MIN ; branch if no swap to do
|
| 7482 |
|
|
|
| 7483 |
|
|
BEQ LAB_MIN ; branch if no swap to do
|
| 7484 |
|
|
|
| 7485 |
|
|
LDA FAC2_1 ; get FAC2 mantissa1
|
| 7486 |
|
|
ORA #$80 ; set top bit (clear sign from compare)
|
| 7487 |
|
|
STA FAC2_1 ; save FAC2 mantissa1
|
| 7488 |
|
|
JSR LAB_279B ; copy FAC2 to FAC1
|
| 7489 |
|
|
BEQ LAB_MIN ; go do next (branch always)
|
| 7490 |
|
|
|
| 7491 |
|
|
; exit routine. don't bother returning to the loop code
|
| 7492 |
|
|
; check for correct exit, else so syntax error
|
| 7493 |
|
|
|
| 7494 |
|
|
LAB_MMEC
|
| 7495 |
|
|
CMP #')' ; is it end of function?
|
| 7496 |
|
|
BNE LAB_MMSE ; if not do MAX MIN syntax error
|
| 7497 |
|
|
|
| 7498 |
|
|
PLA ; dump return address low byte
|
| 7499 |
|
|
PLA ; dump return address high byte
|
| 7500 |
|
|
JMP LAB_IGBY ; update BASIC execute pointer (to chr past ")")
|
| 7501 |
|
|
|
| 7502 |
|
|
LAB_MMSE
|
| 7503 |
|
|
JMP LAB_SNER ; do syntax error then warm start
|
| 7504 |
|
|
|
| 7505 |
|
|
; check for next, evaluate and return or exit
|
| 7506 |
|
|
; this is the routine that does most of the work
|
| 7507 |
|
|
|
| 7508 |
|
|
LAB_PHFA
|
| 7509 |
|
|
JSR LAB_GBYT ; get next BASIC byte
|
| 7510 |
|
|
CMP #',' ; is there more ?
|
| 7511 |
|
|
BNE LAB_MMEC ; if not go do end check
|
| 7512 |
|
|
|
| 7513 |
|
|
; push FAC1
|
| 7514 |
|
|
JSR LAB_27BA ; round FAC1
|
| 7515 |
|
|
LDA FAC1_s ; get FAC1 sign
|
| 7516 |
|
|
ORA #$7F ; set all non sign bits
|
| 7517 |
|
|
AND FAC1_1 ; AND FAC1 mantissa1 (AND in sign bit)
|
| 7518 |
|
|
PHA ; push on stack
|
| 7519 |
|
|
LDA FAC1_2 ; get FAC1 mantissa2
|
| 7520 |
|
|
PHA ; push on stack
|
| 7521 |
|
|
LDA FAC1_3 ; get FAC1 mantissa3
|
| 7522 |
|
|
PHA ; push on stack
|
| 7523 |
|
|
LDA FAC1_e ; get FAC1 exponent
|
| 7524 |
|
|
PHA ; push on stack
|
| 7525 |
|
|
|
| 7526 |
|
|
JSR LAB_IGBY ; scan and get next BASIC byte (after ",")
|
| 7527 |
|
|
JSR LAB_EVNM ; evaluate expression and check is numeric,
|
| 7528 |
|
|
; else do type mismatch
|
| 7529 |
|
|
|
| 7530 |
|
|
; pop FAC2 (MAX/MIN expression so far)
|
| 7531 |
|
|
PLA ; pop exponent
|
| 7532 |
|
|
STA FAC2_e ; save FAC2 exponent
|
| 7533 |
|
|
PLA ; pop mantissa3
|
| 7534 |
|
|
STA FAC2_3 ; save FAC2 mantissa3
|
| 7535 |
|
|
PLA ; pop mantissa1
|
| 7536 |
|
|
STA FAC2_2 ; save FAC2 mantissa2
|
| 7537 |
|
|
PLA ; pop sign/mantissa1
|
| 7538 |
|
|
STA FAC2_1 ; save FAC2 sign/mantissa1
|
| 7539 |
|
|
STA FAC2_s ; save FAC2 sign
|
| 7540 |
|
|
|
| 7541 |
|
|
; compare FAC1 with (packed) FAC2
|
| 7542 |
|
|
LDA #
|
| 7543 |
|
|
LDY #>FAC2_e ; set pointer high byte to FAC2
|
| 7544 |
|
|
JMP LAB_27F8 ; compare FAC1 with FAC2 (AY) and return
|
| 7545 |
|
|
; returns A=$00 if FAC1 = (AY)
|
| 7546 |
|
|
; returns A=$01 if FAC1 > (AY)
|
| 7547 |
|
|
; returns A=$FF if FAC1 < (AY)
|
| 7548 |
|
|
|
| 7549 |
|
|
; perform WIDTH
|
| 7550 |
|
|
|
| 7551 |
|
|
LAB_WDTH
|
| 7552 |
|
|
CMP #',' ; is next byte ","
|
| 7553 |
|
|
BEQ LAB_TBSZ ; if so do tab size
|
| 7554 |
|
|
|
| 7555 |
|
|
JSR LAB_GTBY ; get byte parameter
|
| 7556 |
|
|
TXA ; copy width to A
|
| 7557 |
|
|
BEQ LAB_NSTT ; branch if set for infinite line
|
| 7558 |
|
|
|
| 7559 |
|
|
CPX #$10 ; else make min width = 16d
|
| 7560 |
|
|
BCC TabErr ; if less do function call error and exit
|
| 7561 |
|
|
|
| 7562 |
|
|
; this next compare ensures that we can't exit WIDTH via an error leaving the
|
| 7563 |
|
|
; tab size greater than the line length.
|
| 7564 |
|
|
|
| 7565 |
|
|
CPX TabSiz ; compare with tab size
|
| 7566 |
|
|
BCS LAB_NSTT ; branch if >= tab size
|
| 7567 |
|
|
|
| 7568 |
|
|
STX TabSiz ; else make tab size = terminal width
|
| 7569 |
|
|
LAB_NSTT
|
| 7570 |
|
|
STX TWidth ; set the terminal width
|
| 7571 |
|
|
JSR LAB_GBYT ; get BASIC byte back
|
| 7572 |
|
|
BEQ WExit ; exit if no following
|
| 7573 |
|
|
|
| 7574 |
|
|
CMP #',' ; else is it ","
|
| 7575 |
|
|
BNE LAB_MMSE ; if not do syntax error
|
| 7576 |
|
|
|
| 7577 |
|
|
LAB_TBSZ
|
| 7578 |
|
|
JSR LAB_SGBY ; scan and get byte parameter
|
| 7579 |
|
|
TXA ; copy TAB size
|
| 7580 |
|
|
BMI TabErr ; if >127 do function call error and exit
|
| 7581 |
|
|
|
| 7582 |
|
|
CPX #$01 ; compare with min-1
|
| 7583 |
|
|
BCC TabErr ; if <=1 do function call error and exit
|
| 7584 |
|
|
|
| 7585 |
|
|
LDA TWidth ; set flags for width
|
| 7586 |
|
|
BEQ LAB_SVTB ; skip check if infinite line
|
| 7587 |
|
|
|
| 7588 |
|
|
CPX TWidth ; compare TAB with width
|
| 7589 |
|
|
BEQ LAB_SVTB ; ok if =
|
| 7590 |
|
|
|
| 7591 |
|
|
BCS TabErr ; branch if too big
|
| 7592 |
|
|
|
| 7593 |
|
|
LAB_SVTB
|
| 7594 |
|
|
STX TabSiz ; save TAB size
|
| 7595 |
|
|
|
| 7596 |
|
|
; calculate tab column limit from TAB size. The Iclim is set to the last tab
|
| 7597 |
|
|
; position on a line that still has at least one whole tab width between it
|
| 7598 |
|
|
; and the end of the line.
|
| 7599 |
|
|
|
| 7600 |
|
|
WExit
|
| 7601 |
|
|
LDA TWidth ; get width
|
| 7602 |
|
|
BEQ LAB_SULP ; branch if infinite line
|
| 7603 |
|
|
|
| 7604 |
|
|
CMP TabSiz ; compare with tab size
|
| 7605 |
|
|
BCS LAB_WDLP ; branch if >= tab size
|
| 7606 |
|
|
|
| 7607 |
|
|
STA TabSiz ; else make tab size = terminal width
|
| 7608 |
|
|
LAB_SULP
|
| 7609 |
|
|
SEC ; set carry for subtract
|
| 7610 |
|
|
LAB_WDLP
|
| 7611 |
|
|
SBC TabSiz ; subtract tab size
|
| 7612 |
|
|
BCS LAB_WDLP ; loop while no borrow
|
| 7613 |
|
|
|
| 7614 |
|
|
ADC TabSiz ; add tab size back
|
| 7615 |
|
|
CLC ; clear carry for add
|
| 7616 |
|
|
ADC TabSiz ; add tab size back again
|
| 7617 |
|
|
STA Iclim ; save for now
|
| 7618 |
|
|
LDA TWidth ; get width back
|
| 7619 |
|
|
SEC ; set carry for subtract
|
| 7620 |
|
|
SBC Iclim ; subtract remainder
|
| 7621 |
|
|
STA Iclim ; save tab column limit
|
| 7622 |
|
|
LAB_NOSQ
|
| 7623 |
|
|
RTS
|
| 7624 |
|
|
|
| 7625 |
|
|
TabErr
|
| 7626 |
|
|
JMP LAB_FCER ; do function call error then warm start
|
| 7627 |
|
|
|
| 7628 |
|
|
; perform SQR()
|
| 7629 |
|
|
|
| 7630 |
|
|
LAB_SQR
|
| 7631 |
|
|
LDA FAC1_s ; get FAC1 sign
|
| 7632 |
|
|
BMI TabErr ; if -ve do function call error
|
| 7633 |
|
|
|
| 7634 |
|
|
LDA FAC1_e ; get exponent
|
| 7635 |
|
|
BEQ LAB_NOSQ ; if zero just return
|
| 7636 |
|
|
|
| 7637 |
|
|
; else do root
|
| 7638 |
|
|
JSR LAB_27AB ; round and copy FAC1 to FAC2
|
| 7639 |
|
|
LDA #$00 ; clear A
|
| 7640 |
|
|
|
| 7641 |
|
|
STA FACt_3 ; clear remainder
|
| 7642 |
|
|
STA FACt_2 ; ..
|
| 7643 |
|
|
STA FACt_1 ; ..
|
| 7644 |
|
|
STA TempB ; ..
|
| 7645 |
|
|
|
| 7646 |
|
|
STA FAC1_3 ; clear root
|
| 7647 |
|
|
STA FAC1_2 ; ..
|
| 7648 |
|
|
STA FAC1_1 ; ..
|
| 7649 |
|
|
|
| 7650 |
|
|
LDX #$18 ; 24 pairs of bits to do
|
| 7651 |
|
|
LDA FAC2_e ; get exponent
|
| 7652 |
|
|
LSR ; check odd/even
|
| 7653 |
|
|
BCS LAB_SQE2 ; if odd only 1 shift first time
|
| 7654 |
|
|
|
| 7655 |
|
|
LAB_SQE1
|
| 7656 |
|
|
ASL FAC2_3 ; shift highest bit of number ..
|
| 7657 |
|
|
ROL FAC2_2 ; ..
|
| 7658 |
|
|
ROL FAC2_1 ; ..
|
| 7659 |
|
|
ROL FACt_3 ; .. into remainder
|
| 7660 |
|
|
ROL FACt_2 ; ..
|
| 7661 |
|
|
ROL FACt_1 ; ..
|
| 7662 |
|
|
ROL TempB ; .. never overflows
|
| 7663 |
|
|
LAB_SQE2
|
| 7664 |
|
|
ASL FAC2_3 ; shift highest bit of number ..
|
| 7665 |
|
|
ROL FAC2_2 ; ..
|
| 7666 |
|
|
ROL FAC2_1 ; ..
|
| 7667 |
|
|
ROL FACt_3 ; .. into remainder
|
| 7668 |
|
|
ROL FACt_2 ; ..
|
| 7669 |
|
|
ROL FACt_1 ; ..
|
| 7670 |
|
|
ROL TempB ; .. never overflows
|
| 7671 |
|
|
|
| 7672 |
|
|
ASL FAC1_3 ; root = root * 2
|
| 7673 |
|
|
ROL FAC1_2 ; ..
|
| 7674 |
|
|
ROL FAC1_1 ; .. never overflows
|
| 7675 |
|
|
|
| 7676 |
|
|
LDA FAC1_3 ; get root low byte
|
| 7677 |
|
|
ROL ; *2
|
| 7678 |
|
|
STA Temp3 ; save partial low byte
|
| 7679 |
|
|
LDA FAC1_2 ; get root low mid byte
|
| 7680 |
|
|
ROL ; *2
|
| 7681 |
|
|
STA Temp3+1 ; save partial low mid byte
|
| 7682 |
|
|
LDA FAC1_1 ; get root high mid byte
|
| 7683 |
|
|
ROL ; *2
|
| 7684 |
|
|
STA Temp3+2 ; save partial high mid byte
|
| 7685 |
|
|
LDA #$00 ; get root high byte (always $00)
|
| 7686 |
|
|
ROL ; *2
|
| 7687 |
|
|
STA Temp3+3 ; save partial high byte
|
| 7688 |
|
|
|
| 7689 |
|
|
; carry clear for subtract +1
|
| 7690 |
|
|
LDA FACt_3 ; get remainder low byte
|
| 7691 |
|
|
SBC Temp3 ; subtract partial low byte
|
| 7692 |
|
|
STA Temp3 ; save partial low byte
|
| 7693 |
|
|
|
| 7694 |
|
|
LDA FACt_2 ; get remainder low mid byte
|
| 7695 |
|
|
SBC Temp3+1 ; subtract partial low mid byte
|
| 7696 |
|
|
STA Temp3+1 ; save partial low mid byte
|
| 7697 |
|
|
|
| 7698 |
|
|
LDA FACt_1 ; get remainder high mid byte
|
| 7699 |
|
|
SBC Temp3+2 ; subtract partial high mid byte
|
| 7700 |
|
|
TAY ; copy partial high mid byte
|
| 7701 |
|
|
|
| 7702 |
|
|
LDA TempB ; get remainder high byte
|
| 7703 |
|
|
SBC Temp3+3 ; subtract partial high byte
|
| 7704 |
|
|
BCC LAB_SQNS ; skip sub if remainder smaller
|
| 7705 |
|
|
|
| 7706 |
|
|
STA TempB ; save remainder high byte
|
| 7707 |
|
|
|
| 7708 |
|
|
STY FACt_1 ; save remainder high mid byte
|
| 7709 |
|
|
|
| 7710 |
|
|
LDA Temp3+1 ; get remainder low mid byte
|
| 7711 |
|
|
STA FACt_2 ; save remainder low mid byte
|
| 7712 |
|
|
|
| 7713 |
|
|
LDA Temp3 ; get partial low byte
|
| 7714 |
|
|
STA FACt_3 ; save remainder low byte
|
| 7715 |
|
|
|
| 7716 |
|
|
INC FAC1_3 ; increment root low byte (never any rollover)
|
| 7717 |
|
|
LAB_SQNS
|
| 7718 |
|
|
DEX ; decrement bit pair count
|
| 7719 |
|
|
BNE LAB_SQE1 ; loop if not all done
|
| 7720 |
|
|
|
| 7721 |
|
|
SEC ; set carry for subtract
|
| 7722 |
|
|
LDA FAC2_e ; get exponent
|
| 7723 |
|
|
SBC #$80 ; normalise
|
| 7724 |
|
|
ROR ; /2 and re-bias to $80
|
| 7725 |
|
|
ADC #$00 ; add bit zero back in (allow for half shift)
|
| 7726 |
|
|
STA FAC1_e ; save it
|
| 7727 |
|
|
JMP LAB_24D5 ; normalise FAC1 and return
|
| 7728 |
|
|
|
| 7729 |
|
|
; perform VARPTR()
|
| 7730 |
|
|
|
| 7731 |
|
|
LAB_VARPTR
|
| 7732 |
|
|
JSR LAB_IGBY ; increment and scan memory
|
| 7733 |
|
|
JSR LAB_GVAR ; get var address
|
| 7734 |
|
|
JSR LAB_1BFB ; scan for ")" , else do syntax error then warm start
|
| 7735 |
|
|
LDY Cvaral ; get var address low byte
|
| 7736 |
|
|
LDA Cvarah ; get var address high byte
|
| 7737 |
|
|
JMP LAB_AYFC ; save and convert integer AY to FAC1 and return
|
| 7738 |
|
|
|
| 7739 |
|
|
; perform PI
|
| 7740 |
|
|
|
| 7741 |
|
|
LAB_PI
|
| 7742 |
|
|
LDA #
|
| 7743 |
|
|
LDY #>LAB_2C7C ; set (2*pi) pointer high byte
|
| 7744 |
|
|
JSR LAB_UFAC ; unpack memory (AY) into FAC1
|
| 7745 |
|
|
DEC FAC1_e ; make result = PI
|
| 7746 |
|
|
RTS
|
| 7747 |
|
|
|
| 7748 |
|
|
; perform TWOPI
|
| 7749 |
|
|
|
| 7750 |
|
|
LAB_TWOPI
|
| 7751 |
|
|
LDA #
|
| 7752 |
|
|
LDY #>LAB_2C7C ; set (2*pi) pointer high byte
|
| 7753 |
|
|
JMP LAB_UFAC ; unpack memory (AY) into FAC1 and return
|
| 7754 |
|
|
|
| 7755 |
|
|
; system dependant i/o vectors
|
| 7756 |
|
|
; these are in RAM and are set by the monitor at start-up
|
| 7757 |
|
|
|
| 7758 |
|
|
V_INPT
|
| 7759 |
|
|
JMP (VEC_IN) ; non halting scan input device
|
| 7760 |
|
|
V_OUTP
|
| 7761 |
|
|
JMP (VEC_OUT) ; send byte to output device
|
| 7762 |
|
|
V_LOAD
|
| 7763 |
|
|
JMP (VEC_LD) ; load BASIC program
|
| 7764 |
|
|
V_SAVE
|
| 7765 |
|
|
JMP (VEC_SV) ; save BASIC program
|
| 7766 |
|
|
|
| 7767 |
|
|
LAB_BYE:
|
| 7768 |
|
|
; nat
|
| 7769 |
|
|
.byte $42 ; WDM
|
| 7770 |
|
|
xce
|
| 7771 |
|
|
cpu rtf65002
|
| 7772 |
|
|
jmp (ExitTask>>2)
|
| 7773 |
|
|
cpu W65C02
|
| 7774 |
|
|
|
| 7775 |
|
|
; The rest are tables messages and code for RAM
|
| 7776 |
|
|
|
| 7777 |
|
|
; the rest of the code is tables and BASIC start-up code
|
| 7778 |
|
|
|
| 7779 |
|
|
PG2_TABS
|
| 7780 |
|
|
.byte $00 ; ctrl-c flag - $00 = enabled
|
| 7781 |
|
|
.byte $00 ; ctrl-c byte - GET needs this
|
| 7782 |
|
|
.byte $00 ; ctrl-c byte timeout - GET needs this
|
| 7783 |
|
|
.word CTRLC ; ctrl c check vector
|
| 7784 |
|
|
; .word xxxx ; non halting key input - monitor to set this
|
| 7785 |
|
|
; .word xxxx ; output vector - monitor to set this
|
| 7786 |
|
|
; .word xxxx ; load vector - monitor to set this
|
| 7787 |
|
|
; .word xxxx ; save vector - monitor to set this
|
| 7788 |
|
|
PG2_TABE
|
| 7789 |
|
|
|
| 7790 |
|
|
; character get subroutine for zero page
|
| 7791 |
|
|
|
| 7792 |
|
|
; For a 1.8432MHz 6502 including the JSR and RTS
|
| 7793 |
|
|
; fastest (>=":") = 29 cycles = 15.7uS
|
| 7794 |
|
|
; slowest (<":") = 40 cycles = 21.7uS
|
| 7795 |
|
|
; space skip = +21 cycles = +11.4uS
|
| 7796 |
|
|
; inc across page = +4 cycles = +2.2uS
|
| 7797 |
|
|
|
| 7798 |
|
|
; the target address for the LDA at LAB_2CF4 becomes the BASIC execute pointer once the
|
| 7799 |
|
|
; block is copied to it's destination, any non zero page address will do at assembly
|
| 7800 |
|
|
; time, to assemble a three byte instruction.
|
| 7801 |
|
|
|
| 7802 |
|
|
; page 0 initialisation table from $BC
|
| 7803 |
|
|
; increment and scan memory
|
| 7804 |
|
|
|
| 7805 |
|
|
LAB_2CEE
|
| 7806 |
|
|
INC Bpntrl ; increment BASIC execute pointer low byte
|
| 7807 |
|
|
BNE LAB_2CF4 ; branch if no carry
|
| 7808 |
|
|
; else
|
| 7809 |
|
|
INC Bpntrh ; increment BASIC execute pointer high byte
|
| 7810 |
|
|
|
| 7811 |
|
|
; page 0 initialisation table from $C2
|
| 7812 |
|
|
; scan memory
|
| 7813 |
|
|
|
| 7814 |
|
|
LAB_2CF4
|
| 7815 |
|
|
LDA $FFFF ; get byte to scan (addr set by call routine)
|
| 7816 |
|
|
CMP #TK_ELSE ; compare with the token for ELSE
|
| 7817 |
|
|
BEQ LAB_2D05 ; exit if ELSE, not numeric, carry set
|
| 7818 |
|
|
|
| 7819 |
|
|
CMP #':' ; compare with ":"
|
| 7820 |
|
|
BCS LAB_2D05 ; exit if >= ":", not numeric, carry set
|
| 7821 |
|
|
|
| 7822 |
|
|
CMP #' ' ; compare with " "
|
| 7823 |
|
|
BEQ LAB_2CEE ; if " " go do next
|
| 7824 |
|
|
|
| 7825 |
|
|
SEC ; set carry for SBC
|
| 7826 |
|
|
SBC #'0' ; subtract "0"
|
| 7827 |
|
|
SEC ; set carry for SBC
|
| 7828 |
|
|
SBC #$D0 ; subtract -"0"
|
| 7829 |
|
|
; clear carry if byte = "0"-"9"
|
| 7830 |
|
|
LAB_2D05
|
| 7831 |
|
|
RTS
|
| 7832 |
|
|
|
| 7833 |
|
|
; page zero initialisation table $00-$12 inclusive
|
| 7834 |
|
|
|
| 7835 |
|
|
StrTab
|
| 7836 |
|
|
.byte $4C ; JMP opcode
|
| 7837 |
|
|
.word LAB_COLD ; initial warm start vector (cold start)
|
| 7838 |
|
|
|
| 7839 |
|
|
.byte $00 ; these bytes are not used by BASIC
|
| 7840 |
|
|
.word $0000 ;
|
| 7841 |
|
|
.word $0000 ;
|
| 7842 |
|
|
.word $0000 ;
|
| 7843 |
|
|
|
| 7844 |
|
|
.byte $4C ; JMP opcode
|
| 7845 |
|
|
.word LAB_FCER ; initial user function vector ("Function call" error)
|
| 7846 |
|
|
.byte $00 ; default NULL count
|
| 7847 |
|
|
.byte $00 ; clear terminal position
|
| 7848 |
|
|
.byte $00 ; default terminal width byte
|
| 7849 |
|
|
.byte $F2 ; default limit for TAB = 14
|
| 7850 |
|
|
.word Ram_base ; start of user RAM
|
| 7851 |
|
|
EndTab
|
| 7852 |
|
|
|
| 7853 |
|
|
LAB_MSZM
|
| 7854 |
|
|
.byte $0D,$0A,"Memory size ",$00
|
| 7855 |
|
|
|
| 7856 |
|
|
LAB_SMSG
|
| 7857 |
|
|
.byte " Bytes free",$0D,$0A,$0A
|
| 7858 |
|
|
.byte "Enhanced BASIC 2.22",$0A,$00
|
| 7859 |
|
|
|
| 7860 |
|
|
; numeric constants and series
|
| 7861 |
|
|
|
| 7862 |
|
|
; constants and series for LOG(n)
|
| 7863 |
|
|
LAB_25A0
|
| 7864 |
|
|
.byte $02 ; counter
|
| 7865 |
|
|
.byte $80,$19,$56,$62 ; 0.59898
|
| 7866 |
|
|
.byte $80,$76,$22,$F3 ; 0.96147
|
| 7867 |
|
|
;## .byte $80,$76,$22,$F1 ; 0.96147
|
| 7868 |
|
|
.byte $82,$38,$AA,$40 ; 2.88539
|
| 7869 |
|
|
;## .byte $82,$38,$AA,$45 ; 2.88539
|
| 7870 |
|
|
|
| 7871 |
|
|
LAB_25AD
|
| 7872 |
|
|
.byte $80,$35,$04,$F3 ; 0.70711 1/root 2
|
| 7873 |
|
|
LAB_25B1
|
| 7874 |
|
|
.byte $81,$35,$04,$F3 ; 1.41421 root 2
|
| 7875 |
|
|
LAB_25B5
|
| 7876 |
|
|
.byte $80,$80,$00,$00 ; -0.5
|
| 7877 |
|
|
LAB_25B9
|
| 7878 |
|
|
.byte $80,$31,$72,$18 ; 0.69315 LOG(2)
|
| 7879 |
|
|
|
| 7880 |
|
|
; numeric PRINT constants
|
| 7881 |
|
|
LAB_2947
|
| 7882 |
|
|
.byte $91,$43,$4F,$F8 ; 99999.9375 (max value with at least one decimal)
|
| 7883 |
|
|
LAB_294B
|
| 7884 |
|
|
.byte $94,$74,$23,$F7 ; 999999.4375 (max value before scientific notation)
|
| 7885 |
|
|
LAB_294F
|
| 7886 |
|
|
.byte $94,$74,$24,$00 ; 1000000
|
| 7887 |
|
|
|
| 7888 |
|
|
; EXP(n) constants and series
|
| 7889 |
|
|
LAB_2AFA
|
| 7890 |
|
|
.byte $81,$38,$AA,$3B ; 1.4427 (1/LOG base 2 e)
|
| 7891 |
|
|
LAB_2AFE
|
| 7892 |
|
|
.byte $06 ; counter
|
| 7893 |
|
|
.byte $74,$63,$90,$8C ; 2.17023e-4
|
| 7894 |
|
|
.byte $77,$23,$0C,$AB ; 0.00124
|
| 7895 |
|
|
.byte $7A,$1E,$94,$00 ; 0.00968
|
| 7896 |
|
|
.byte $7C,$63,$42,$80 ; 0.05548
|
| 7897 |
|
|
.byte $7E,$75,$FE,$D0 ; 0.24023
|
| 7898 |
|
|
.byte $80,$31,$72,$15 ; 0.69315
|
| 7899 |
|
|
.byte $81,$00,$00,$00 ; 1.00000
|
| 7900 |
|
|
|
| 7901 |
|
|
;## .byte $07 ; counter
|
| 7902 |
|
|
;## .byte $74,$94,$2E,$40 ; -1/7! (-1/5040)
|
| 7903 |
|
|
;## .byte $77,$2E,$4F,$70 ; 1/6! ( 1/720)
|
| 7904 |
|
|
;## .byte $7A,$88,$02,$6E ; -1/5! (-1/120)
|
| 7905 |
|
|
;## .byte $7C,$2A,$A0,$E6 ; 1/4! ( 1/24)
|
| 7906 |
|
|
;## .byte $7E,$AA,$AA,$50 ; -1/3! (-1/6)
|
| 7907 |
|
|
;## .byte $7F,$7F,$FF,$FF ; 1/2! ( 1/2)
|
| 7908 |
|
|
;## .byte $81,$80,$00,$00 ; -1/1! (-1/1)
|
| 7909 |
|
|
;## .byte $81,$00,$00,$00 ; 1/0! ( 1/1)
|
| 7910 |
|
|
|
| 7911 |
|
|
; trigonometric constants and series
|
| 7912 |
|
|
LAB_2C78
|
| 7913 |
|
|
.byte $81,$49,$0F,$DB ; 1.570796371 (pi/2) as floating #
|
| 7914 |
|
|
LAB_2C84
|
| 7915 |
|
|
.byte $04 ; counter
|
| 7916 |
|
|
.byte $86,$1E,$D7,$FB ; 39.7109
|
| 7917 |
|
|
;## .byte $86,$1E,$D7,$BA ; 39.7109
|
| 7918 |
|
|
.byte $87,$99,$26,$65 ;-76.575
|
| 7919 |
|
|
;## .byte $87,$99,$26,$64 ;-76.575
|
| 7920 |
|
|
.byte $87,$23,$34,$58 ; 81.6022
|
| 7921 |
|
|
.byte $86,$A5,$5D,$E1 ;-41.3417
|
| 7922 |
|
|
;## .byte $86,$A5,$5D,$E0 ;-41.3417
|
| 7923 |
|
|
LAB_2C7C
|
| 7924 |
|
|
.byte $83,$49,$0F,$DB ; 6.28319 (2*pi) as floating #
|
| 7925 |
|
|
;## .byte $83,$49,$0F,$DA ; 6.28319 (2*pi) as floating #
|
| 7926 |
|
|
|
| 7927 |
|
|
LAB_2CC9
|
| 7928 |
|
|
.byte $08 ; counter
|
| 7929 |
|
|
.byte $78,$3A,$C5,$37 ; 0.00285
|
| 7930 |
|
|
.byte $7B,$83,$A2,$5C ;-0.0160686
|
| 7931 |
|
|
.byte $7C,$2E,$DD,$4D ; 0.0426915
|
| 7932 |
|
|
.byte $7D,$99,$B0,$1E ;-0.0750429
|
| 7933 |
|
|
.byte $7D,$59,$ED,$24 ; 0.106409
|
| 7934 |
|
|
.byte $7E,$91,$72,$00 ;-0.142036
|
| 7935 |
|
|
.byte $7E,$4C,$B9,$73 ; 0.199926
|
| 7936 |
|
|
.byte $7F,$AA,$AA,$53 ;-0.333331
|
| 7937 |
|
|
|
| 7938 |
|
|
;## .byte $08 ; counter
|
| 7939 |
|
|
;## .byte $78,$3B,$D7,$4A ; 1/17
|
| 7940 |
|
|
;## .byte $7B,$84,$6E,$02 ;-1/15
|
| 7941 |
|
|
;## .byte $7C,$2F,$C1,$FE ; 1/13
|
| 7942 |
|
|
;## .byte $7D,$9A,$31,$74 ;-1/11
|
| 7943 |
|
|
;## .byte $7D,$5A,$3D,$84 ; 1/9
|
| 7944 |
|
|
;## .byte $7E,$91,$7F,$C8 ;-1/7
|
| 7945 |
|
|
;## .byte $7E,$4C,$BB,$E4 ; 1/5
|
| 7946 |
|
|
;## .byte $7F,$AA,$AA,$6C ;-1/3
|
| 7947 |
|
|
|
| 7948 |
|
|
LAB_1D96 = *+1 ; $00,$00 used for undefined variables
|
| 7949 |
|
|
LAB_259C
|
| 7950 |
|
|
.byte $81,$00,$00,$00 ; 1.000000, used for INC
|
| 7951 |
|
|
LAB_2AFD
|
| 7952 |
|
|
.byte $81,$80,$00,$00 ; -1.00000, used for DEC. must be on the same page as +1.00
|
| 7953 |
|
|
|
| 7954 |
|
|
; misc constants
|
| 7955 |
|
|
LAB_1DF7
|
| 7956 |
|
|
.byte $90 ;-32768 (uses first three bytes from 0.5)
|
| 7957 |
|
|
LAB_2A96
|
| 7958 |
|
|
.byte $80,$00,$00,$00 ; 0.5
|
| 7959 |
|
|
LAB_2C80
|
| 7960 |
|
|
.byte $7F,$00,$00,$00 ; 0.25
|
| 7961 |
|
|
LAB_26B5
|
| 7962 |
|
|
.byte $84,$20,$00,$00 ; 10.0000 divide by 10 constant
|
| 7963 |
|
|
|
| 7964 |
|
|
; This table is used in converting numbers to ASCII.
|
| 7965 |
|
|
|
| 7966 |
|
|
LAB_2A9A
|
| 7967 |
|
|
LAB_2A9B = LAB_2A9A+1
|
| 7968 |
|
|
LAB_2A9C = LAB_2A9B+1
|
| 7969 |
|
|
.byte $FE,$79,$60 ; -100000
|
| 7970 |
|
|
.byte $00,$27,$10 ; 10000
|
| 7971 |
|
|
.byte $FF,$FC,$18 ; -1000
|
| 7972 |
|
|
.byte $00,$00,$64 ; 100
|
| 7973 |
|
|
.byte $FF,$FF,$F6 ; -10
|
| 7974 |
|
|
.byte $00,$00,$01 ; 1
|
| 7975 |
|
|
|
| 7976 |
|
|
LAB_CTBL
|
| 7977 |
|
|
.word LAB_END-1 ; END
|
| 7978 |
|
|
.word LAB_FOR-1 ; FOR
|
| 7979 |
|
|
.word LAB_NEXT-1 ; NEXT
|
| 7980 |
|
|
.word LAB_DATA-1 ; DATA
|
| 7981 |
|
|
.word LAB_INPUT-1 ; INPUT
|
| 7982 |
|
|
.word LAB_DIM-1 ; DIM
|
| 7983 |
|
|
.word LAB_READ-1 ; READ
|
| 7984 |
|
|
.word LAB_LET-1 ; LET
|
| 7985 |
|
|
.word LAB_DEC-1 ; DEC new command
|
| 7986 |
|
|
.word LAB_GOTO-1 ; GOTO
|
| 7987 |
|
|
.word LAB_RUN-1 ; RUN
|
| 7988 |
|
|
.word LAB_IF-1 ; IF
|
| 7989 |
|
|
.word LAB_RESTORE-1 ; RESTORE modified command
|
| 7990 |
|
|
.word LAB_GOSUB-1 ; GOSUB
|
| 7991 |
|
|
.word LAB_RETIRQ-1 ; RETIRQ new command
|
| 7992 |
|
|
.word LAB_RETNMI-1 ; RETNMI new command
|
| 7993 |
|
|
.word LAB_RETURN-1 ; RETURN
|
| 7994 |
|
|
.word LAB_REM-1 ; REM
|
| 7995 |
|
|
.word LAB_STOP-1 ; STOP
|
| 7996 |
|
|
.word LAB_ON-1 ; ON modified command
|
| 7997 |
|
|
.word LAB_NULL-1 ; NULL modified command
|
| 7998 |
|
|
.word LAB_INC-1 ; INC new command
|
| 7999 |
|
|
.word LAB_WAIT-1 ; WAIT
|
| 8000 |
|
|
.word V_LOAD-1 ; LOAD
|
| 8001 |
|
|
.word V_SAVE-1 ; SAVE
|
| 8002 |
|
|
.word LAB_DEF-1 ; DEF
|
| 8003 |
|
|
.word LAB_POKE-1 ; POKE
|
| 8004 |
|
|
.word LAB_DOKE-1 ; DOKE new command
|
| 8005 |
|
|
.word LAB_CALL-1 ; CALL new command
|
| 8006 |
|
|
.word LAB_DO-1 ; DO new command
|
| 8007 |
|
|
.word LAB_LOOP-1 ; LOOP new command
|
| 8008 |
|
|
.word LAB_PRINT-1 ; PRINT
|
| 8009 |
|
|
.word LAB_CONT-1 ; CONT
|
| 8010 |
|
|
.word LAB_LIST-1 ; LIST
|
| 8011 |
|
|
.word LAB_CLEAR-1 ; CLEAR
|
| 8012 |
|
|
.word LAB_NEW-1 ; NEW
|
| 8013 |
|
|
.word LAB_WDTH-1 ; WIDTH new command
|
| 8014 |
|
|
.word LAB_GET-1 ; GET new command
|
| 8015 |
|
|
.word LAB_SWAP-1 ; SWAP new command
|
| 8016 |
|
|
.word LAB_BITSET-1 ; BITSET new command
|
| 8017 |
|
|
.word LAB_BITCLR-1 ; BITCLR new command
|
| 8018 |
|
|
.word LAB_IRQ-1 ; IRQ new command
|
| 8019 |
|
|
.word LAB_NMI-1 ; NMI new command
|
| 8020 |
|
|
.word LAB_BYE-1 ; BYE new command
|
| 8021 |
|
|
|
| 8022 |
|
|
; function pre process routine table
|
| 8023 |
|
|
|
| 8024 |
|
|
LAB_FTPL
|
| 8025 |
|
|
LAB_FTPM = LAB_FTPL+$01
|
| 8026 |
|
|
.word LAB_PPFN-1 ; SGN(n) process numeric expression in ()
|
| 8027 |
|
|
.word LAB_PPFN-1 ; INT(n) "
|
| 8028 |
|
|
.word LAB_PPFN-1 ; ABS(n) "
|
| 8029 |
|
|
.word LAB_EVEZ-1 ; USR(x) process any expression
|
| 8030 |
|
|
.word LAB_1BF7-1 ; FRE(x) "
|
| 8031 |
|
|
.word LAB_1BF7-1 ; POS(x) "
|
| 8032 |
|
|
.word LAB_PPFN-1 ; SQR(n) process numeric expression in ()
|
| 8033 |
|
|
.word LAB_PPFN-1 ; RND(n) "
|
| 8034 |
|
|
.word LAB_PPFN-1 ; LOG(n) "
|
| 8035 |
|
|
.word LAB_PPFN-1 ; EXP(n) "
|
| 8036 |
|
|
.word LAB_PPFN-1 ; COS(n) "
|
| 8037 |
|
|
.word LAB_PPFN-1 ; SIN(n) "
|
| 8038 |
|
|
.word LAB_PPFN-1 ; TAN(n) "
|
| 8039 |
|
|
.word LAB_PPFN-1 ; ATN(n) "
|
| 8040 |
|
|
.word LAB_PPFN-1 ; PEEK(n) "
|
| 8041 |
|
|
.word LAB_PPFN-1 ; DEEK(n) "
|
| 8042 |
|
|
.word $0000 ; SADD() none
|
| 8043 |
|
|
.word LAB_PPFS-1 ; LEN($) process string expression in ()
|
| 8044 |
|
|
.word LAB_PPFN-1 ; STR$(n) process numeric expression in ()
|
| 8045 |
|
|
.word LAB_PPFS-1 ; VAL($) process string expression in ()
|
| 8046 |
|
|
.word LAB_PPFS-1 ; ASC($) "
|
| 8047 |
|
|
.word LAB_PPFS-1 ; UCASE$($) "
|
| 8048 |
|
|
.word LAB_PPFS-1 ; LCASE$($) "
|
| 8049 |
|
|
.word LAB_PPFN-1 ; CHR$(n) process numeric expression in ()
|
| 8050 |
|
|
.word LAB_BHSS-1 ; HEX$(n) "
|
| 8051 |
|
|
.word LAB_BHSS-1 ; BIN$(n) "
|
| 8052 |
|
|
.word $0000 ; BITTST() none
|
| 8053 |
|
|
.word LAB_MMPP-1 ; MAX() process numeric expression
|
| 8054 |
|
|
.word LAB_MMPP-1 ; MIN() "
|
| 8055 |
|
|
.word LAB_PPBI-1 ; PI advance pointer
|
| 8056 |
|
|
.word LAB_PPBI-1 ; TWOPI "
|
| 8057 |
|
|
.word $0000 ; VARPTR() none
|
| 8058 |
|
|
.word LAB_LRMS-1 ; LEFT$() process string expression
|
| 8059 |
|
|
.word LAB_LRMS-1 ; RIGHT$() "
|
| 8060 |
|
|
.word LAB_LRMS-1 ; MID$() "
|
| 8061 |
|
|
|
| 8062 |
|
|
; action addresses for functions
|
| 8063 |
|
|
|
| 8064 |
|
|
LAB_FTBL
|
| 8065 |
|
|
LAB_FTBM = LAB_FTBL+$01
|
| 8066 |
|
|
.word LAB_SGN-1 ; SGN()
|
| 8067 |
|
|
.word LAB_INT-1 ; INT()
|
| 8068 |
|
|
.word LAB_ABS-1 ; ABS()
|
| 8069 |
|
|
.word LAB_USR-1 ; USR()
|
| 8070 |
|
|
.word LAB_FRE-1 ; FRE()
|
| 8071 |
|
|
.word LAB_POS-1 ; POS()
|
| 8072 |
|
|
.word LAB_SQR-1 ; SQR()
|
| 8073 |
|
|
.word LAB_RND-1 ; RND() modified function
|
| 8074 |
|
|
.word LAB_LOG-1 ; LOG()
|
| 8075 |
|
|
.word LAB_EXP-1 ; EXP()
|
| 8076 |
|
|
.word LAB_COS-1 ; COS()
|
| 8077 |
|
|
.word LAB_SIN-1 ; SIN()
|
| 8078 |
|
|
.word LAB_TAN-1 ; TAN()
|
| 8079 |
|
|
.word LAB_ATN-1 ; ATN()
|
| 8080 |
|
|
.word LAB_PEEK-1 ; PEEK()
|
| 8081 |
|
|
.word LAB_DEEK-1 ; DEEK() new function
|
| 8082 |
|
|
.word LAB_SADD-1 ; SADD() new function
|
| 8083 |
|
|
.word LAB_LENS-1 ; LEN()
|
| 8084 |
|
|
.word LAB_STRS-1 ; STR$()
|
| 8085 |
|
|
.word LAB_VAL-1 ; VAL()
|
| 8086 |
|
|
.word LAB_ASC-1 ; ASC()
|
| 8087 |
|
|
.word LAB_UCASE-1 ; UCASE$() new function
|
| 8088 |
|
|
.word LAB_LCASE-1 ; LCASE$() new function
|
| 8089 |
|
|
.word LAB_CHRS-1 ; CHR$()
|
| 8090 |
|
|
.word LAB_HEXS-1 ; HEX$() new function
|
| 8091 |
|
|
.word LAB_BINS-1 ; BIN$() new function
|
| 8092 |
|
|
.word LAB_BTST-1 ; BITTST() new function
|
| 8093 |
|
|
.word LAB_MAX-1 ; MAX() new function
|
| 8094 |
|
|
.word LAB_MIN-1 ; MIN() new function
|
| 8095 |
|
|
.word LAB_PI-1 ; PI new function
|
| 8096 |
|
|
.word LAB_TWOPI-1 ; TWOPI new function
|
| 8097 |
|
|
.word LAB_VARPTR-1 ; VARPTR() new function
|
| 8098 |
|
|
.word LAB_LEFT-1 ; LEFT$()
|
| 8099 |
|
|
.word LAB_RIGHT-1 ; RIGHT$()
|
| 8100 |
|
|
.word LAB_MIDS-1 ; MID$()
|
| 8101 |
|
|
|
| 8102 |
|
|
; hierarchy and action addresses for operator
|
| 8103 |
|
|
|
| 8104 |
|
|
LAB_OPPT
|
| 8105 |
|
|
.byte $79 ; +
|
| 8106 |
|
|
.word LAB_ADD-1
|
| 8107 |
|
|
.byte $79 ; -
|
| 8108 |
|
|
.word LAB_SUBTRACT-1
|
| 8109 |
|
|
.byte $7B ; *
|
| 8110 |
|
|
.word LAB_MULTIPLY-1
|
| 8111 |
|
|
.byte $7B ; /
|
| 8112 |
|
|
.word LAB_DIVIDE-1
|
| 8113 |
|
|
.byte $7F ; ^
|
| 8114 |
|
|
.word LAB_POWER-1
|
| 8115 |
|
|
.byte $50 ; AND
|
| 8116 |
|
|
.word LAB_AND-1
|
| 8117 |
|
|
.byte $46 ; EOR new operator
|
| 8118 |
|
|
.word LAB_EOR-1
|
| 8119 |
|
|
.byte $46 ; OR
|
| 8120 |
|
|
.word LAB_OR-1
|
| 8121 |
|
|
.byte $56 ; >> new operator
|
| 8122 |
|
|
.word LAB_RSHIFT-1
|
| 8123 |
|
|
.byte $56 ; << new operator
|
| 8124 |
|
|
.word LAB_LSHIFT-1
|
| 8125 |
|
|
.byte $7D ; >
|
| 8126 |
|
|
.word LAB_GTHAN-1
|
| 8127 |
|
|
.byte $5A ; =
|
| 8128 |
|
|
.word LAB_EQUAL-1
|
| 8129 |
|
|
.byte $64 ; <
|
| 8130 |
|
|
.word LAB_LTHAN-1
|
| 8131 |
|
|
|
| 8132 |
|
|
; keywords start with ..
|
| 8133 |
|
|
; this is the first character table and must be in alphabetic order
|
| 8134 |
|
|
|
| 8135 |
|
|
TAB_1STC
|
| 8136 |
|
|
.byte "*"
|
| 8137 |
|
|
.byte "+"
|
| 8138 |
|
|
.byte "-"
|
| 8139 |
|
|
.byte "/"
|
| 8140 |
|
|
.byte "<"
|
| 8141 |
|
|
.byte "="
|
| 8142 |
|
|
.byte ">"
|
| 8143 |
|
|
.byte "?"
|
| 8144 |
|
|
.byte "A"
|
| 8145 |
|
|
.byte "B"
|
| 8146 |
|
|
.byte "C"
|
| 8147 |
|
|
.byte "D"
|
| 8148 |
|
|
.byte "E"
|
| 8149 |
|
|
.byte "F"
|
| 8150 |
|
|
.byte "G"
|
| 8151 |
|
|
.byte "H"
|
| 8152 |
|
|
.byte "I"
|
| 8153 |
|
|
.byte "L"
|
| 8154 |
|
|
.byte "M"
|
| 8155 |
|
|
.byte "N"
|
| 8156 |
|
|
.byte "O"
|
| 8157 |
|
|
.byte "P"
|
| 8158 |
|
|
.byte "R"
|
| 8159 |
|
|
.byte "S"
|
| 8160 |
|
|
.byte "T"
|
| 8161 |
|
|
.byte "U"
|
| 8162 |
|
|
.byte "V"
|
| 8163 |
|
|
.byte "W"
|
| 8164 |
|
|
.byte "^"
|
| 8165 |
|
|
.byte $00 ; table terminator
|
| 8166 |
|
|
|
| 8167 |
|
|
; pointers to keyword tables
|
| 8168 |
|
|
|
| 8169 |
|
|
TAB_CHRT
|
| 8170 |
|
|
.word TAB_STAR ; table for "*"
|
| 8171 |
|
|
.word TAB_PLUS ; table for "+"
|
| 8172 |
|
|
.word TAB_MNUS ; table for "-"
|
| 8173 |
|
|
.word TAB_SLAS ; table for "/"
|
| 8174 |
|
|
.word TAB_LESS ; table for "<"
|
| 8175 |
|
|
.word TAB_EQUL ; table for "="
|
| 8176 |
|
|
.word TAB_MORE ; table for ">"
|
| 8177 |
|
|
.word TAB_QEST ; table for "?"
|
| 8178 |
|
|
.word TAB_ASCA ; table for "A"
|
| 8179 |
|
|
.word TAB_ASCB ; table for "B"
|
| 8180 |
|
|
.word TAB_ASCC ; table for "C"
|
| 8181 |
|
|
.word TAB_ASCD ; table for "D"
|
| 8182 |
|
|
.word TAB_ASCE ; table for "E"
|
| 8183 |
|
|
.word TAB_ASCF ; table for "F"
|
| 8184 |
|
|
.word TAB_ASCG ; table for "G"
|
| 8185 |
|
|
.word TAB_ASCH ; table for "H"
|
| 8186 |
|
|
.word TAB_ASCI ; table for "I"
|
| 8187 |
|
|
.word TAB_ASCL ; table for "L"
|
| 8188 |
|
|
.word TAB_ASCM ; table for "M"
|
| 8189 |
|
|
.word TAB_ASCN ; table for "N"
|
| 8190 |
|
|
.word TAB_ASCO ; table for "O"
|
| 8191 |
|
|
.word TAB_ASCP ; table for "P"
|
| 8192 |
|
|
.word TAB_ASCR ; table for "R"
|
| 8193 |
|
|
.word TAB_ASCS ; table for "S"
|
| 8194 |
|
|
.word TAB_ASCT ; table for "T"
|
| 8195 |
|
|
.word TAB_ASCU ; table for "U"
|
| 8196 |
|
|
.word TAB_ASCV ; table for "V"
|
| 8197 |
|
|
.word TAB_ASCW ; table for "W"
|
| 8198 |
|
|
.word TAB_POWR ; table for "^"
|
| 8199 |
|
|
|
| 8200 |
|
|
; tables for each start character, note if a longer keyword with the same start
|
| 8201 |
|
|
; letters as a shorter one exists then it must come first, else the list is in
|
| 8202 |
|
|
; alphabetical order as follows ..
|
| 8203 |
|
|
|
| 8204 |
|
|
; [keyword,token
|
| 8205 |
|
|
; [keyword,token]]
|
| 8206 |
|
|
; end marker (#$00)
|
| 8207 |
|
|
|
| 8208 |
|
|
TAB_STAR
|
| 8209 |
|
|
.byte TK_MUL,$00 ; *
|
| 8210 |
|
|
TAB_PLUS
|
| 8211 |
|
|
.byte TK_PLUS,$00 ; +
|
| 8212 |
|
|
TAB_MNUS
|
| 8213 |
|
|
.byte TK_MINUS,$00 ; -
|
| 8214 |
|
|
TAB_SLAS
|
| 8215 |
|
|
.byte TK_DIV,$00 ; /
|
| 8216 |
|
|
TAB_LESS
|
| 8217 |
|
|
LBB_LSHIFT
|
| 8218 |
|
|
.byte "<",TK_LSHIFT ; << note - "<<" must come before "<"
|
| 8219 |
|
|
.byte TK_LT ; <
|
| 8220 |
|
|
.byte $00
|
| 8221 |
|
|
TAB_EQUL
|
| 8222 |
|
|
.byte TK_EQUAL,$00 ; =
|
| 8223 |
|
|
TAB_MORE
|
| 8224 |
|
|
LBB_RSHIFT
|
| 8225 |
|
|
.byte ">",TK_RSHIFT ; >> note - ">>" must come before ">"
|
| 8226 |
|
|
.byte TK_GT ; >
|
| 8227 |
|
|
.byte $00
|
| 8228 |
|
|
TAB_QEST
|
| 8229 |
|
|
.byte TK_PRINT,$00 ; ?
|
| 8230 |
|
|
TAB_ASCA
|
| 8231 |
|
|
LBB_ABS
|
| 8232 |
|
|
.byte "BS(",TK_ABS ; ABS(
|
| 8233 |
|
|
LBB_AND
|
| 8234 |
|
|
.byte "ND",TK_AND ; AND
|
| 8235 |
|
|
LBB_ASC
|
| 8236 |
|
|
.byte "SC(",TK_ASC ; ASC(
|
| 8237 |
|
|
LBB_ATN
|
| 8238 |
|
|
.byte "TN(",TK_ATN ; ATN(
|
| 8239 |
|
|
.byte $00
|
| 8240 |
|
|
TAB_ASCB
|
| 8241 |
|
|
LBB_BINS
|
| 8242 |
|
|
.byte "IN$(",TK_BINS ; BIN$(
|
| 8243 |
|
|
LBB_BITCLR
|
| 8244 |
|
|
.byte "ITCLR",TK_BITCLR ; BITCLR
|
| 8245 |
|
|
LBB_BITSET
|
| 8246 |
|
|
.byte "ITSET",TK_BITSET ; BITSET
|
| 8247 |
|
|
LBB_BITTST
|
| 8248 |
|
|
.byte "ITTST(",TK_BITTST
|
| 8249 |
|
|
; BITTST(
|
| 8250 |
|
|
LBB_BYE
|
| 8251 |
|
|
.byte "YE", TK_BYE ; BYE
|
| 8252 |
|
|
.byte $00
|
| 8253 |
|
|
TAB_ASCC
|
| 8254 |
|
|
LBB_CALL
|
| 8255 |
|
|
.byte "ALL",TK_CALL ; CALL
|
| 8256 |
|
|
LBB_CHRS
|
| 8257 |
|
|
.byte "HR$(",TK_CHRS ; CHR$(
|
| 8258 |
|
|
LBB_CLEAR
|
| 8259 |
|
|
.byte "LEAR",TK_CLEAR ; CLEAR
|
| 8260 |
|
|
LBB_CONT
|
| 8261 |
|
|
.byte "ONT",TK_CONT ; CONT
|
| 8262 |
|
|
LBB_COS
|
| 8263 |
|
|
.byte "OS(",TK_COS ; COS(
|
| 8264 |
|
|
.byte $00
|
| 8265 |
|
|
TAB_ASCD
|
| 8266 |
|
|
LBB_DATA
|
| 8267 |
|
|
.byte "ATA",TK_DATA ; DATA
|
| 8268 |
|
|
LBB_DEC
|
| 8269 |
|
|
.byte "EC",TK_DEC ; DEC
|
| 8270 |
|
|
LBB_DEEK
|
| 8271 |
|
|
.byte "EEK(",TK_DEEK ; DEEK(
|
| 8272 |
|
|
LBB_DEF
|
| 8273 |
|
|
.byte "EF",TK_DEF ; DEF
|
| 8274 |
|
|
LBB_DIM
|
| 8275 |
|
|
.byte "IM",TK_DIM ; DIM
|
| 8276 |
|
|
LBB_DOKE
|
| 8277 |
|
|
.byte "OKE",TK_DOKE ; DOKE note - "DOKE" must come before "DO"
|
| 8278 |
|
|
LBB_DO
|
| 8279 |
|
|
.byte "O",TK_DO ; DO
|
| 8280 |
|
|
.byte $00
|
| 8281 |
|
|
TAB_ASCE
|
| 8282 |
|
|
LBB_ELSE
|
| 8283 |
|
|
.byte "LSE",TK_ELSE ; ELSE
|
| 8284 |
|
|
LBB_END
|
| 8285 |
|
|
.byte "ND",TK_END ; END
|
| 8286 |
|
|
LBB_EOR
|
| 8287 |
|
|
.byte "OR",TK_EOR ; EOR
|
| 8288 |
|
|
LBB_EXP
|
| 8289 |
|
|
.byte "XP(",TK_EXP ; EXP(
|
| 8290 |
|
|
.byte $00
|
| 8291 |
|
|
TAB_ASCF
|
| 8292 |
|
|
LBB_FN
|
| 8293 |
|
|
.byte "N",TK_FN ; FN
|
| 8294 |
|
|
LBB_FOR
|
| 8295 |
|
|
.byte "OR",TK_FOR ; FOR
|
| 8296 |
|
|
LBB_FRE
|
| 8297 |
|
|
.byte "RE(",TK_FRE ; FRE(
|
| 8298 |
|
|
.byte $00
|
| 8299 |
|
|
TAB_ASCG
|
| 8300 |
|
|
LBB_GET
|
| 8301 |
|
|
.byte "ET",TK_GET ; GET
|
| 8302 |
|
|
LBB_GOSUB
|
| 8303 |
|
|
.byte "OSUB",TK_GOSUB ; GOSUB
|
| 8304 |
|
|
LBB_GOTO
|
| 8305 |
|
|
.byte "OTO",TK_GOTO ; GOTO
|
| 8306 |
|
|
.byte $00
|
| 8307 |
|
|
TAB_ASCH
|
| 8308 |
|
|
LBB_HEXS
|
| 8309 |
|
|
.byte "EX$(",TK_HEXS ; HEX$(
|
| 8310 |
|
|
.byte $00
|
| 8311 |
|
|
TAB_ASCI
|
| 8312 |
|
|
LBB_IF
|
| 8313 |
|
|
.byte "F",TK_IF ; IF
|
| 8314 |
|
|
LBB_INC
|
| 8315 |
|
|
.byte "NC",TK_INC ; INC
|
| 8316 |
|
|
LBB_INPUT
|
| 8317 |
|
|
.byte "NPUT",TK_INPUT ; INPUT
|
| 8318 |
|
|
LBB_INT
|
| 8319 |
|
|
.byte "NT(",TK_INT ; INT(
|
| 8320 |
|
|
LBB_IRQ
|
| 8321 |
|
|
.byte "RQ",TK_IRQ ; IRQ
|
| 8322 |
|
|
.byte $00
|
| 8323 |
|
|
TAB_ASCL
|
| 8324 |
|
|
LBB_LCASES
|
| 8325 |
|
|
.byte "CASE$(",TK_LCASES
|
| 8326 |
|
|
; LCASE$(
|
| 8327 |
|
|
LBB_LEFTS
|
| 8328 |
|
|
.byte "EFT$(",TK_LEFTS ; LEFT$(
|
| 8329 |
|
|
LBB_LEN
|
| 8330 |
|
|
.byte "EN(",TK_LEN ; LEN(
|
| 8331 |
|
|
LBB_LET
|
| 8332 |
|
|
.byte "ET",TK_LET ; LET
|
| 8333 |
|
|
LBB_LIST
|
| 8334 |
|
|
.byte "IST",TK_LIST ; LIST
|
| 8335 |
|
|
LBB_LOAD
|
| 8336 |
|
|
.byte "OAD",TK_LOAD ; LOAD
|
| 8337 |
|
|
LBB_LOG
|
| 8338 |
|
|
.byte "OG(",TK_LOG ; LOG(
|
| 8339 |
|
|
LBB_LOOP
|
| 8340 |
|
|
.byte "OOP",TK_LOOP ; LOOP
|
| 8341 |
|
|
.byte $00
|
| 8342 |
|
|
TAB_ASCM
|
| 8343 |
|
|
LBB_MAX
|
| 8344 |
|
|
.byte "AX(",TK_MAX ; MAX(
|
| 8345 |
|
|
LBB_MIDS
|
| 8346 |
|
|
.byte "ID$(",TK_MIDS ; MID$(
|
| 8347 |
|
|
LBB_MIN
|
| 8348 |
|
|
.byte "IN(",TK_MIN ; MIN(
|
| 8349 |
|
|
.byte $00
|
| 8350 |
|
|
TAB_ASCN
|
| 8351 |
|
|
LBB_NEW
|
| 8352 |
|
|
.byte "EW",TK_NEW ; NEW
|
| 8353 |
|
|
LBB_NEXT
|
| 8354 |
|
|
.byte "EXT",TK_NEXT ; NEXT
|
| 8355 |
|
|
LBB_NMI
|
| 8356 |
|
|
.byte "MI",TK_NMI ; NMI
|
| 8357 |
|
|
LBB_NOT
|
| 8358 |
|
|
.byte "OT",TK_NOT ; NOT
|
| 8359 |
|
|
LBB_NULL
|
| 8360 |
|
|
.byte "ULL",TK_NULL ; NULL
|
| 8361 |
|
|
.byte $00
|
| 8362 |
|
|
TAB_ASCO
|
| 8363 |
|
|
LBB_OFF
|
| 8364 |
|
|
.byte "FF",TK_OFF ; OFF
|
| 8365 |
|
|
LBB_ON
|
| 8366 |
|
|
.byte "N",TK_ON ; ON
|
| 8367 |
|
|
LBB_OR
|
| 8368 |
|
|
.byte "R",TK_OR ; OR
|
| 8369 |
|
|
.byte $00
|
| 8370 |
|
|
TAB_ASCP
|
| 8371 |
|
|
LBB_PEEK
|
| 8372 |
|
|
.byte "EEK(",TK_PEEK ; PEEK(
|
| 8373 |
|
|
LBB_PI
|
| 8374 |
|
|
.byte "I",TK_PI ; PI
|
| 8375 |
|
|
LBB_POKE
|
| 8376 |
|
|
.byte "OKE",TK_POKE ; POKE
|
| 8377 |
|
|
LBB_POS
|
| 8378 |
|
|
.byte "OS(",TK_POS ; POS(
|
| 8379 |
|
|
LBB_PRINT
|
| 8380 |
|
|
.byte "RINT",TK_PRINT ; PRINT
|
| 8381 |
|
|
.byte $00
|
| 8382 |
|
|
TAB_ASCR
|
| 8383 |
|
|
LBB_READ
|
| 8384 |
|
|
.byte "EAD",TK_READ ; READ
|
| 8385 |
|
|
LBB_REM
|
| 8386 |
|
|
.byte "EM",TK_REM ; REM
|
| 8387 |
|
|
LBB_RESTORE
|
| 8388 |
|
|
.byte "ESTORE",TK_RESTORE
|
| 8389 |
|
|
; RESTORE
|
| 8390 |
|
|
LBB_RETIRQ
|
| 8391 |
|
|
.byte "ETIRQ",TK_RETIRQ ; RETIRQ
|
| 8392 |
|
|
LBB_RETNMI
|
| 8393 |
|
|
.byte "ETNMI",TK_RETNMI ; RETNMI
|
| 8394 |
|
|
LBB_RETURN
|
| 8395 |
|
|
.byte "ETURN",TK_RETURN ; RETURN
|
| 8396 |
|
|
LBB_RIGHTS
|
| 8397 |
|
|
.byte "IGHT$(",TK_RIGHTS
|
| 8398 |
|
|
; RIGHT$(
|
| 8399 |
|
|
LBB_RND
|
| 8400 |
|
|
.byte "ND(",TK_RND ; RND(
|
| 8401 |
|
|
LBB_RUN
|
| 8402 |
|
|
.byte "UN",TK_RUN ; RUN
|
| 8403 |
|
|
.byte $00
|
| 8404 |
|
|
TAB_ASCS
|
| 8405 |
|
|
LBB_SADD
|
| 8406 |
|
|
.byte "ADD(",TK_SADD ; SADD(
|
| 8407 |
|
|
LBB_SAVE
|
| 8408 |
|
|
.byte "AVE",TK_SAVE ; SAVE
|
| 8409 |
|
|
LBB_SGN
|
| 8410 |
|
|
.byte "GN(",TK_SGN ; SGN(
|
| 8411 |
|
|
LBB_SIN
|
| 8412 |
|
|
.byte "IN(",TK_SIN ; SIN(
|
| 8413 |
|
|
LBB_SPC
|
| 8414 |
|
|
.byte "PC(",TK_SPC ; SPC(
|
| 8415 |
|
|
LBB_SQR
|
| 8416 |
|
|
.byte "QR(",TK_SQR ; SQR(
|
| 8417 |
|
|
LBB_STEP
|
| 8418 |
|
|
.byte "TEP",TK_STEP ; STEP
|
| 8419 |
|
|
LBB_STOP
|
| 8420 |
|
|
.byte "TOP",TK_STOP ; STOP
|
| 8421 |
|
|
LBB_STRS
|
| 8422 |
|
|
.byte "TR$(",TK_STRS ; STR$(
|
| 8423 |
|
|
LBB_SWAP
|
| 8424 |
|
|
.byte "WAP",TK_SWAP ; SWAP
|
| 8425 |
|
|
.byte $00
|
| 8426 |
|
|
TAB_ASCT
|
| 8427 |
|
|
LBB_TAB
|
| 8428 |
|
|
.byte "AB(",TK_TAB ; TAB(
|
| 8429 |
|
|
LBB_TAN
|
| 8430 |
|
|
.byte "AN(",TK_TAN ; TAN(
|
| 8431 |
|
|
LBB_THEN
|
| 8432 |
|
|
.byte "HEN",TK_THEN ; THEN
|
| 8433 |
|
|
LBB_TO
|
| 8434 |
|
|
.byte "O",TK_TO ; TO
|
| 8435 |
|
|
LBB_TWOPI
|
| 8436 |
|
|
.byte "WOPI",TK_TWOPI ; TWOPI
|
| 8437 |
|
|
.byte $00
|
| 8438 |
|
|
TAB_ASCU
|
| 8439 |
|
|
LBB_UCASES
|
| 8440 |
|
|
.byte "CASE$(",TK_UCASES
|
| 8441 |
|
|
; UCASE$(
|
| 8442 |
|
|
LBB_UNTIL
|
| 8443 |
|
|
.byte "NTIL",TK_UNTIL ; UNTIL
|
| 8444 |
|
|
LBB_USR
|
| 8445 |
|
|
.byte "SR(",TK_USR ; USR(
|
| 8446 |
|
|
.byte $00
|
| 8447 |
|
|
TAB_ASCV
|
| 8448 |
|
|
LBB_VAL
|
| 8449 |
|
|
.byte "AL(",TK_VAL ; VAL(
|
| 8450 |
|
|
LBB_VPTR
|
| 8451 |
|
|
.byte "ARPTR(",TK_VPTR ; VARPTR(
|
| 8452 |
|
|
.byte $00
|
| 8453 |
|
|
TAB_ASCW
|
| 8454 |
|
|
LBB_WAIT
|
| 8455 |
|
|
.byte "AIT",TK_WAIT ; WAIT
|
| 8456 |
|
|
LBB_WHILE
|
| 8457 |
|
|
.byte "HILE",TK_WHILE ; WHILE
|
| 8458 |
|
|
LBB_WIDTH
|
| 8459 |
|
|
.byte "IDTH",TK_WIDTH ; WIDTH
|
| 8460 |
|
|
.byte $00
|
| 8461 |
|
|
TAB_POWR
|
| 8462 |
|
|
.byte TK_POWER,$00 ; ^
|
| 8463 |
|
|
|
| 8464 |
|
|
; new decode table for LIST
|
| 8465 |
|
|
; Table is ..
|
| 8466 |
|
|
; byte - keyword length, keyword first character
|
| 8467 |
|
|
; word - pointer to rest of keyword from dictionary
|
| 8468 |
|
|
|
| 8469 |
|
|
; note if length is 1 then the pointer is ignored
|
| 8470 |
|
|
|
| 8471 |
|
|
LAB_KEYT
|
| 8472 |
|
|
.byte 3,'E'
|
| 8473 |
|
|
.word LBB_END ; END
|
| 8474 |
|
|
.byte 3,'F'
|
| 8475 |
|
|
.word LBB_FOR ; FOR
|
| 8476 |
|
|
.byte 4,'N'
|
| 8477 |
|
|
.word LBB_NEXT ; NEXT
|
| 8478 |
|
|
.byte 4,'D'
|
| 8479 |
|
|
.word LBB_DATA ; DATA
|
| 8480 |
|
|
.byte 5,'I'
|
| 8481 |
|
|
.word LBB_INPUT ; INPUT
|
| 8482 |
|
|
.byte 3,'D'
|
| 8483 |
|
|
.word LBB_DIM ; DIM
|
| 8484 |
|
|
.byte 4,'R'
|
| 8485 |
|
|
.word LBB_READ ; READ
|
| 8486 |
|
|
.byte 3,'L'
|
| 8487 |
|
|
.word LBB_LET ; LET
|
| 8488 |
|
|
.byte 3,'D'
|
| 8489 |
|
|
.word LBB_DEC ; DEC
|
| 8490 |
|
|
.byte 4,'G'
|
| 8491 |
|
|
.word LBB_GOTO ; GOTO
|
| 8492 |
|
|
.byte 3,'R'
|
| 8493 |
|
|
.word LBB_RUN ; RUN
|
| 8494 |
|
|
.byte 2,'I'
|
| 8495 |
|
|
.word LBB_IF ; IF
|
| 8496 |
|
|
.byte 7,'R'
|
| 8497 |
|
|
.word LBB_RESTORE ; RESTORE
|
| 8498 |
|
|
.byte 5,'G'
|
| 8499 |
|
|
.word LBB_GOSUB ; GOSUB
|
| 8500 |
|
|
.byte 6,'R'
|
| 8501 |
|
|
.word LBB_RETIRQ ; RETIRQ
|
| 8502 |
|
|
.byte 6,'R'
|
| 8503 |
|
|
.word LBB_RETNMI ; RETNMI
|
| 8504 |
|
|
.byte 6,'R'
|
| 8505 |
|
|
.word LBB_RETURN ; RETURN
|
| 8506 |
|
|
.byte 3,'R'
|
| 8507 |
|
|
.word LBB_REM ; REM
|
| 8508 |
|
|
.byte 4,'S'
|
| 8509 |
|
|
.word LBB_STOP ; STOP
|
| 8510 |
|
|
.byte 2,'O'
|
| 8511 |
|
|
.word LBB_ON ; ON
|
| 8512 |
|
|
.byte 4,'N'
|
| 8513 |
|
|
.word LBB_NULL ; NULL
|
| 8514 |
|
|
.byte 3,'I'
|
| 8515 |
|
|
.word LBB_INC ; INC
|
| 8516 |
|
|
.byte 4,'W'
|
| 8517 |
|
|
.word LBB_WAIT ; WAIT
|
| 8518 |
|
|
.byte 4,'L'
|
| 8519 |
|
|
.word LBB_LOAD ; LOAD
|
| 8520 |
|
|
.byte 4,'S'
|
| 8521 |
|
|
.word LBB_SAVE ; SAVE
|
| 8522 |
|
|
.byte 3,'D'
|
| 8523 |
|
|
.word LBB_DEF ; DEF
|
| 8524 |
|
|
.byte 4,'P'
|
| 8525 |
|
|
.word LBB_POKE ; POKE
|
| 8526 |
|
|
.byte 4,'D'
|
| 8527 |
|
|
.word LBB_DOKE ; DOKE
|
| 8528 |
|
|
.byte 4,'C'
|
| 8529 |
|
|
.word LBB_CALL ; CALL
|
| 8530 |
|
|
.byte 2,'D'
|
| 8531 |
|
|
.word LBB_DO ; DO
|
| 8532 |
|
|
.byte 4,'L'
|
| 8533 |
|
|
.word LBB_LOOP ; LOOP
|
| 8534 |
|
|
.byte 5,'P'
|
| 8535 |
|
|
.word LBB_PRINT ; PRINT
|
| 8536 |
|
|
.byte 4,'C'
|
| 8537 |
|
|
.word LBB_CONT ; CONT
|
| 8538 |
|
|
.byte 4,'L'
|
| 8539 |
|
|
.word LBB_LIST ; LIST
|
| 8540 |
|
|
.byte 5,'C'
|
| 8541 |
|
|
.word LBB_CLEAR ; CLEAR
|
| 8542 |
|
|
.byte 3,'N'
|
| 8543 |
|
|
.word LBB_NEW ; NEW
|
| 8544 |
|
|
.byte 5,'W'
|
| 8545 |
|
|
.word LBB_WIDTH ; WIDTH
|
| 8546 |
|
|
.byte 3,'G'
|
| 8547 |
|
|
.word LBB_GET ; GET
|
| 8548 |
|
|
.byte 4,'S'
|
| 8549 |
|
|
.word LBB_SWAP ; SWAP
|
| 8550 |
|
|
.byte 6,'B'
|
| 8551 |
|
|
.word LBB_BITSET ; BITSET
|
| 8552 |
|
|
.byte 6,'B'
|
| 8553 |
|
|
.word LBB_BITCLR ; BITCLR
|
| 8554 |
|
|
.byte 3,'I'
|
| 8555 |
|
|
.word LBB_IRQ ; IRQ
|
| 8556 |
|
|
.byte 3,'N'
|
| 8557 |
|
|
.word LBB_NMI ; NMI
|
| 8558 |
|
|
.byte 3,'B'
|
| 8559 |
|
|
.word LBB_BYE ; BYE
|
| 8560 |
|
|
|
| 8561 |
|
|
; secondary commands (can't start a statement)
|
| 8562 |
|
|
|
| 8563 |
|
|
.byte 4,'T'
|
| 8564 |
|
|
.word LBB_TAB ; TAB
|
| 8565 |
|
|
.byte 4,'E'
|
| 8566 |
|
|
.word LBB_ELSE ; ELSE
|
| 8567 |
|
|
.byte 2,'T'
|
| 8568 |
|
|
.word LBB_TO ; TO
|
| 8569 |
|
|
.byte 2,'F'
|
| 8570 |
|
|
.word LBB_FN ; FN
|
| 8571 |
|
|
.byte 4,'S'
|
| 8572 |
|
|
.word LBB_SPC ; SPC
|
| 8573 |
|
|
.byte 4,'T'
|
| 8574 |
|
|
.word LBB_THEN ; THEN
|
| 8575 |
|
|
.byte 3,'N'
|
| 8576 |
|
|
.word LBB_NOT ; NOT
|
| 8577 |
|
|
.byte 4,'S'
|
| 8578 |
|
|
.word LBB_STEP ; STEP
|
| 8579 |
|
|
.byte 5,'U'
|
| 8580 |
|
|
.word LBB_UNTIL ; UNTIL
|
| 8581 |
|
|
.byte 5,'W'
|
| 8582 |
|
|
.word LBB_WHILE ; WHILE
|
| 8583 |
|
|
.byte 3,'O'
|
| 8584 |
|
|
.word LBB_OFF ; OFF
|
| 8585 |
|
|
|
| 8586 |
|
|
; opperators
|
| 8587 |
|
|
|
| 8588 |
|
|
.byte 1,'+'
|
| 8589 |
|
|
.word $0000 ; +
|
| 8590 |
|
|
.byte 1,'-'
|
| 8591 |
|
|
.word $0000 ; -
|
| 8592 |
|
|
.byte 1,'*'
|
| 8593 |
|
|
.word $0000 ; *
|
| 8594 |
|
|
.byte 1,'/'
|
| 8595 |
|
|
.word $0000 ; /
|
| 8596 |
|
|
.byte 1,'^'
|
| 8597 |
|
|
.word $0000 ; ^
|
| 8598 |
|
|
.byte 3,'A'
|
| 8599 |
|
|
.word LBB_AND ; AND
|
| 8600 |
|
|
.byte 3,'E'
|
| 8601 |
|
|
.word LBB_EOR ; EOR
|
| 8602 |
|
|
.byte 2,'O'
|
| 8603 |
|
|
.word LBB_OR ; OR
|
| 8604 |
|
|
.byte 2,'>'
|
| 8605 |
|
|
.word LBB_RSHIFT ; >>
|
| 8606 |
|
|
.byte 2,'<'
|
| 8607 |
|
|
.word LBB_LSHIFT ; <<
|
| 8608 |
|
|
.byte 1,'>'
|
| 8609 |
|
|
.word $0000 ; >
|
| 8610 |
|
|
.byte 1,'='
|
| 8611 |
|
|
.word $0000 ; =
|
| 8612 |
|
|
.byte 1,'<'
|
| 8613 |
|
|
.word $0000 ; <
|
| 8614 |
|
|
|
| 8615 |
|
|
; functions
|
| 8616 |
|
|
|
| 8617 |
|
|
.byte 4,'S' ;
|
| 8618 |
|
|
.word LBB_SGN ; SGN
|
| 8619 |
|
|
.byte 4,'I' ;
|
| 8620 |
|
|
.word LBB_INT ; INT
|
| 8621 |
|
|
.byte 4,'A' ;
|
| 8622 |
|
|
.word LBB_ABS ; ABS
|
| 8623 |
|
|
.byte 4,'U' ;
|
| 8624 |
|
|
.word LBB_USR ; USR
|
| 8625 |
|
|
.byte 4,'F' ;
|
| 8626 |
|
|
.word LBB_FRE ; FRE
|
| 8627 |
|
|
.byte 4,'P' ;
|
| 8628 |
|
|
.word LBB_POS ; POS
|
| 8629 |
|
|
.byte 4,'S' ;
|
| 8630 |
|
|
.word LBB_SQR ; SQR
|
| 8631 |
|
|
.byte 4,'R' ;
|
| 8632 |
|
|
.word LBB_RND ; RND
|
| 8633 |
|
|
.byte 4,'L' ;
|
| 8634 |
|
|
.word LBB_LOG ; LOG
|
| 8635 |
|
|
.byte 4,'E' ;
|
| 8636 |
|
|
.word LBB_EXP ; EXP
|
| 8637 |
|
|
.byte 4,'C' ;
|
| 8638 |
|
|
.word LBB_COS ; COS
|
| 8639 |
|
|
.byte 4,'S' ;
|
| 8640 |
|
|
.word LBB_SIN ; SIN
|
| 8641 |
|
|
.byte 4,'T' ;
|
| 8642 |
|
|
.word LBB_TAN ; TAN
|
| 8643 |
|
|
.byte 4,'A' ;
|
| 8644 |
|
|
.word LBB_ATN ; ATN
|
| 8645 |
|
|
.byte 5,'P' ;
|
| 8646 |
|
|
.word LBB_PEEK ; PEEK
|
| 8647 |
|
|
.byte 5,'D' ;
|
| 8648 |
|
|
.word LBB_DEEK ; DEEK
|
| 8649 |
|
|
.byte 5,'S' ;
|
| 8650 |
|
|
.word LBB_SADD ; SADD
|
| 8651 |
|
|
.byte 4,'L' ;
|
| 8652 |
|
|
.word LBB_LEN ; LEN
|
| 8653 |
|
|
.byte 5,'S' ;
|
| 8654 |
|
|
.word LBB_STRS ; STR$
|
| 8655 |
|
|
.byte 4,'V' ;
|
| 8656 |
|
|
.word LBB_VAL ; VAL
|
| 8657 |
|
|
.byte 4,'A' ;
|
| 8658 |
|
|
.word LBB_ASC ; ASC
|
| 8659 |
|
|
.byte 7,'U' ;
|
| 8660 |
|
|
.word LBB_UCASES ; UCASE$
|
| 8661 |
|
|
.byte 7,'L' ;
|
| 8662 |
|
|
.word LBB_LCASES ; LCASE$
|
| 8663 |
|
|
.byte 5,'C' ;
|
| 8664 |
|
|
.word LBB_CHRS ; CHR$
|
| 8665 |
|
|
.byte 5,'H' ;
|
| 8666 |
|
|
.word LBB_HEXS ; HEX$
|
| 8667 |
|
|
.byte 5,'B' ;
|
| 8668 |
|
|
.word LBB_BINS ; BIN$
|
| 8669 |
|
|
.byte 7,'B' ;
|
| 8670 |
|
|
.word LBB_BITTST ; BITTST
|
| 8671 |
|
|
.byte 4,'M' ;
|
| 8672 |
|
|
.word LBB_MAX ; MAX
|
| 8673 |
|
|
.byte 4,'M' ;
|
| 8674 |
|
|
.word LBB_MIN ; MIN
|
| 8675 |
|
|
.byte 2,'P' ;
|
| 8676 |
|
|
.word LBB_PI ; PI
|
| 8677 |
|
|
.byte 5,'T' ;
|
| 8678 |
|
|
.word LBB_TWOPI ; TWOPI
|
| 8679 |
|
|
.byte 7,'V' ;
|
| 8680 |
|
|
.word LBB_VPTR ; VARPTR
|
| 8681 |
|
|
.byte 6,'L' ;
|
| 8682 |
|
|
.word LBB_LEFTS ; LEFT$
|
| 8683 |
|
|
.byte 7,'R' ;
|
| 8684 |
|
|
.word LBB_RIGHTS ; RIGHT$
|
| 8685 |
|
|
.byte 5,'M' ;
|
| 8686 |
|
|
.word LBB_MIDS ; MID$
|
| 8687 |
|
|
|
| 8688 |
|
|
; BASIC messages, mostly error messages
|
| 8689 |
|
|
|
| 8690 |
|
|
LAB_BAER
|
| 8691 |
|
|
.word ERR_NF ;$00 NEXT without FOR
|
| 8692 |
|
|
.word ERR_SN ;$02 syntax
|
| 8693 |
|
|
.word ERR_RG ;$04 RETURN without GOSUB
|
| 8694 |
|
|
.word ERR_OD ;$06 out of data
|
| 8695 |
|
|
.word ERR_FC ;$08 function call
|
| 8696 |
|
|
.word ERR_OV ;$0A overflow
|
| 8697 |
|
|
.word ERR_OM ;$0C out of memory
|
| 8698 |
|
|
.word ERR_US ;$0E undefined statement
|
| 8699 |
|
|
.word ERR_BS ;$10 array bounds
|
| 8700 |
|
|
.word ERR_DD ;$12 double dimension array
|
| 8701 |
|
|
.word ERR_D0 ;$14 divide by 0
|
| 8702 |
|
|
.word ERR_ID ;$16 illegal direct
|
| 8703 |
|
|
.word ERR_TM ;$18 type mismatch
|
| 8704 |
|
|
.word ERR_LS ;$1A long string
|
| 8705 |
|
|
.word ERR_ST ;$1C string too complex
|
| 8706 |
|
|
.word ERR_CN ;$1E continue error
|
| 8707 |
|
|
.word ERR_UF ;$20 undefined function
|
| 8708 |
|
|
.word ERR_LD ;$22 LOOP without DO
|
| 8709 |
|
|
|
| 8710 |
|
|
; I may implement these two errors to force definition of variables and
|
| 8711 |
|
|
; dimensioning of arrays before use.
|
| 8712 |
|
|
|
| 8713 |
|
|
; .word ERR_UV ;$24 undefined variable
|
| 8714 |
|
|
|
| 8715 |
|
|
; the above error has been tested and works (see code and comments below LAB_1D8B)
|
| 8716 |
|
|
|
| 8717 |
|
|
; .word ERR_UA ;$26 undimensioned array
|
| 8718 |
|
|
|
| 8719 |
|
|
ERR_NF .byte "NEXT without FOR",$00
|
| 8720 |
|
|
ERR_SN .byte "Syntax",$00
|
| 8721 |
|
|
ERR_RG .byte "RETURN without GOSUB",$00
|
| 8722 |
|
|
ERR_OD .byte "Out of DATA",$00
|
| 8723 |
|
|
ERR_FC .byte "Function call",$00
|
| 8724 |
|
|
ERR_OV .byte "Overflow",$00
|
| 8725 |
|
|
ERR_OM .byte "Out of memory",$00
|
| 8726 |
|
|
ERR_US .byte "Undefined statement",$00
|
| 8727 |
|
|
ERR_BS .byte "Array bounds",$00
|
| 8728 |
|
|
ERR_DD .byte "Double dimension",$00
|
| 8729 |
|
|
ERR_D0 .byte "Divide by zero",$00
|
| 8730 |
|
|
ERR_ID .byte "Illegal direct",$00
|
| 8731 |
|
|
ERR_TM .byte "Type mismatch",$00
|
| 8732 |
|
|
ERR_LS .byte "String too long",$00
|
| 8733 |
|
|
ERR_ST .byte "String too complex",$00
|
| 8734 |
|
|
ERR_CN .byte "Can't continue",$00
|
| 8735 |
|
|
ERR_UF .byte "Undefined function",$00
|
| 8736 |
|
|
ERR_LD .byte "LOOP without DO",$00
|
| 8737 |
|
|
|
| 8738 |
|
|
;ERR_UV .byte "Undefined variable",$00
|
| 8739 |
|
|
|
| 8740 |
|
|
; the above error has been tested and works (see code and comments below LAB_1D8B)
|
| 8741 |
|
|
|
| 8742 |
|
|
;ERR_UA .byte "Undimensioned array",$00
|
| 8743 |
|
|
|
| 8744 |
|
|
LAB_BMSG .byte $0D,$0A,"Break",$00
|
| 8745 |
|
|
LAB_EMSG .byte " Error",$00
|
| 8746 |
|
|
LAB_LMSG .byte " in line ",$00
|
| 8747 |
|
|
LAB_RMSG .byte $0D,$0A,"Ready",$0D,$0A,$00
|
| 8748 |
|
|
|
| 8749 |
|
|
LAB_IMSG .byte " Extra ignored",$0D,$0A,$00
|
| 8750 |
|
|
LAB_REDO .byte " Redo from start",$0D,$0A,$00
|
| 8751 |
|
|
|
| 8752 |
|
|
AA_end_basic
|
| 8753 |
|
|
|
| 8754 |
|
|
vecbrki=$0102
|
| 8755 |
|
|
|
| 8756 |
|
|
org $F000
|
| 8757 |
|
|
|
| 8758 |
|
|
cpu rtf65002
|
| 8759 |
|
|
jsr (RequestIOFocus>>2)
|
| 8760 |
|
|
jsr (ClearScreen>>2)
|
| 8761 |
|
|
jsr (HomeCursor>>2)
|
| 8762 |
|
|
lda #0 ; turn off keyboard echoing
|
| 8763 |
|
|
jsr (SetKeyboardEcho>>2)
|
| 8764 |
|
|
emm
|
| 8765 |
|
|
cpu W65C02
|
| 8766 |
|
|
LDA #
|
| 8767 |
|
|
STA VEC_IN
|
| 8768 |
|
|
LDA #>V__INPT
|
| 8769 |
|
|
STA VEC_IN+1
|
| 8770 |
|
|
LDA #
|
| 8771 |
|
|
STA VEC_OUT
|
| 8772 |
|
|
LDA #>V__OUTP
|
| 8773 |
|
|
STA VEC_OUT+1
|
| 8774 |
|
|
LDA #
|
| 8775 |
|
|
STA VEC_LD
|
| 8776 |
|
|
LDA #>LOAD3
|
| 8777 |
|
|
STA VEC_LD+1
|
| 8778 |
|
|
LDA #
|
| 8779 |
|
|
STA VEC_SV
|
| 8780 |
|
|
LDA #>SAVE3
|
| 8781 |
|
|
STA VEC_SV+1
|
| 8782 |
|
|
JMP LAB_COLD
|
| 8783 |
|
|
|
| 8784 |
|
|
; ===== Output character to the console from register r1
|
| 8785 |
|
|
; (Preserves all registers.)
|
| 8786 |
|
|
; Does a far indirect subroutine call to native code.
|
| 8787 |
|
|
;
|
| 8788 |
|
|
V__OUTP:
|
| 8789 |
|
|
nat
|
| 8790 |
|
|
cpu rtf65002
|
| 8791 |
|
|
pha
|
| 8792 |
|
|
jsr (DisplayChar>>2) ; should not trash char
|
| 8793 |
|
|
pla
|
| 8794 |
|
|
emm
|
| 8795 |
|
|
cpu W65C02
|
| 8796 |
|
|
and #$FF ; set Z, N according to char in accumulator
|
| 8797 |
|
|
rts
|
| 8798 |
|
|
|
| 8799 |
|
|
; ===== Output character to the console from register r1
|
| 8800 |
|
|
; (Preserves all registers.)
|
| 8801 |
|
|
; Does a far indirect subroutine call to native code.
|
| 8802 |
|
|
;
|
| 8803 |
|
|
V__OUTP816:
|
| 8804 |
|
|
nat
|
| 8805 |
|
|
cpu rtf65002
|
| 8806 |
|
|
pha
|
| 8807 |
|
|
jsr (DisplayChar>>2) ; should not trash char
|
| 8808 |
|
|
pla
|
| 8809 |
|
|
clc
|
| 8810 |
|
|
xce
|
| 8811 |
|
|
cpu W65C02
|
| 8812 |
|
|
rts
|
| 8813 |
|
|
|
| 8814 |
|
|
|
| 8815 |
|
|
; ===== Input a character from the console into register R1
|
| 8816 |
|
|
; set C if a char is available
|
| 8817 |
|
|
; clear C if no char is available
|
| 8818 |
|
|
;
|
| 8819 |
|
|
;
|
| 8820 |
|
|
V__INPT:
|
| 8821 |
|
|
nat
|
| 8822 |
|
|
cpu rtf65002
|
| 8823 |
|
|
jsr (KeybdGetChar>>2)
|
| 8824 |
|
|
cmp #-1
|
| 8825 |
|
|
beq .0001
|
| 8826 |
|
|
emm
|
| 8827 |
|
|
cpu W65C02
|
| 8828 |
|
|
sec
|
| 8829 |
|
|
rts
|
| 8830 |
|
|
.0001:
|
| 8831 |
|
|
cpu rtf65002
|
| 8832 |
|
|
emm
|
| 8833 |
|
|
cpu W65C02
|
| 8834 |
|
|
clc
|
| 8835 |
|
|
rts
|
| 8836 |
|
|
|
| 8837 |
|
|
; ===== Input a character from the console into register R1
|
| 8838 |
|
|
; clear C if a char is available
|
| 8839 |
|
|
; set C if no char is available
|
| 8840 |
|
|
;
|
| 8841 |
|
|
;
|
| 8842 |
|
|
V__INPT816:
|
| 8843 |
|
|
nat
|
| 8844 |
|
|
cpu rtf65002
|
| 8845 |
|
|
jsr (KeybdGetChar>>2)
|
| 8846 |
|
|
cmp #-1
|
| 8847 |
|
|
beq .001
|
| 8848 |
|
|
clc
|
| 8849 |
|
|
xce
|
| 8850 |
|
|
cpu W65C02
|
| 8851 |
|
|
clc
|
| 8852 |
|
|
rts
|
| 8853 |
|
|
.001:
|
| 8854 |
|
|
cpu rtf65002
|
| 8855 |
|
|
clc
|
| 8856 |
|
|
xce
|
| 8857 |
|
|
cpu W65C02
|
| 8858 |
|
|
sec
|
| 8859 |
|
|
rts
|
| 8860 |
|
|
|
| 8861 |
|
|
Resched816:
|
| 8862 |
|
|
nat
|
| 8863 |
|
|
cpu rtf65002
|
| 8864 |
|
|
int #2
|
| 8865 |
|
|
clc
|
| 8866 |
|
|
xce
|
| 8867 |
|
|
cpu W65C816S
|
| 8868 |
|
|
rts
|
| 8869 |
|
|
|
| 8870 |
|
|
;*
|
| 8871 |
|
|
;* ===== Input a character from the host into register r1 (or
|
| 8872 |
|
|
;* return Zero status if there's no character available).
|
| 8873 |
|
|
;*
|
| 8874 |
|
|
cpu rtf65002
|
| 8875 |
|
|
AUXIN_INIT:
|
| 8876 |
|
|
stz INPNDX
|
| 8877 |
|
|
lda #FILENAME
|
| 8878 |
|
|
ldx #FILEBUF<<2
|
| 8879 |
|
|
ldy #$3800 ; max length
|
| 8880 |
|
|
jsr (LoadFile>>2)
|
| 8881 |
|
|
rts
|
| 8882 |
|
|
|
| 8883 |
|
|
cpu W65C02
|
| 8884 |
|
|
AUXIN:
|
| 8885 |
|
|
nat
|
| 8886 |
|
|
cpu RTF65002
|
| 8887 |
|
|
phx
|
| 8888 |
|
|
ldx INPNDX
|
| 8889 |
|
|
lb r1,FILEBUF<<2,x
|
| 8890 |
|
|
cmp #$1A ; end of file ?
|
| 8891 |
|
|
bne AUXIN1
|
| 8892 |
|
|
sec
|
| 8893 |
|
|
xce
|
| 8894 |
|
|
cpu W65C02
|
| 8895 |
|
|
; restore the regular output
|
| 8896 |
|
|
lda $E0
|
| 8897 |
|
|
sta VEC_IN
|
| 8898 |
|
|
lda $E1
|
| 8899 |
|
|
sta VEC_IN+1
|
| 8900 |
|
|
lda #$0D
|
| 8901 |
|
|
sec
|
| 8902 |
|
|
rts
|
| 8903 |
|
|
cpu RTF65002
|
| 8904 |
|
|
AUXIN1:
|
| 8905 |
|
|
inx
|
| 8906 |
|
|
stx INPNDX
|
| 8907 |
|
|
plx
|
| 8908 |
|
|
emm
|
| 8909 |
|
|
cpu W65C02
|
| 8910 |
|
|
sec
|
| 8911 |
|
|
rts
|
| 8912 |
|
|
|
| 8913 |
|
|
; ===== Output character to the host (Port 2) from register r1
|
| 8914 |
|
|
; (Preserves all registers.)
|
| 8915 |
|
|
;
|
| 8916 |
|
|
AUXOUT_INIT:
|
| 8917 |
|
|
stz OUTNDX
|
| 8918 |
|
|
rts
|
| 8919 |
|
|
|
| 8920 |
|
|
AUXOUT:
|
| 8921 |
|
|
cpu W65C02
|
| 8922 |
|
|
nat
|
| 8923 |
|
|
cpu RTF65002
|
| 8924 |
|
|
phx
|
| 8925 |
|
|
ldx OUTNDX
|
| 8926 |
|
|
sb r1,FILEBUF<<2,x
|
| 8927 |
|
|
inx
|
| 8928 |
|
|
stx OUTNDX
|
| 8929 |
|
|
plx
|
| 8930 |
|
|
emm
|
| 8931 |
|
|
cpu W65C02
|
| 8932 |
|
|
rts
|
| 8933 |
|
|
|
| 8934 |
|
|
cpu RTF65002
|
| 8935 |
|
|
AUXOUT_FLUSH:
|
| 8936 |
|
|
lda #FILENAME
|
| 8937 |
|
|
ldx #FILEBUF<<2
|
| 8938 |
|
|
ldy OUTNDX
|
| 8939 |
|
|
jsr (SaveFile>>2)
|
| 8940 |
|
|
rts
|
| 8941 |
|
|
|
| 8942 |
|
|
LOAD3:
|
| 8943 |
|
|
jsr LAB_EVEZ ; get a string parameter
|
| 8944 |
|
|
lda Dtypef
|
| 8945 |
|
|
bpl LOAD4
|
| 8946 |
|
|
ldy #0
|
| 8947 |
|
|
lda (des_pl),y
|
| 8948 |
|
|
sta str_ln
|
| 8949 |
|
|
iny
|
| 8950 |
|
|
lda (des_pl),y
|
| 8951 |
|
|
sta str_pl
|
| 8952 |
|
|
iny
|
| 8953 |
|
|
lda (des_ph),y
|
| 8954 |
|
|
sta str_ph
|
| 8955 |
|
|
nat
|
| 8956 |
|
|
cpu RTF65002
|
| 8957 |
|
|
lb r4,str_ph ; r4 = pointer to file name
|
| 8958 |
|
|
asl r4,r4,#8
|
| 8959 |
|
|
orb r4,r4,str_pl
|
| 8960 |
|
|
lda #8 ; 8 words to zero out
|
| 8961 |
|
|
ldx #0 ; the value we want to use
|
| 8962 |
|
|
ldy #FILENAME ; the target address
|
| 8963 |
|
|
stos ; zap the memory
|
| 8964 |
|
|
lda str_ln ; number of bytes to move
|
| 8965 |
|
|
ld r2,r4 ; x = source
|
| 8966 |
|
|
ldy #FILENAME ; y = dest
|
| 8967 |
|
|
LOAD2:
|
| 8968 |
|
|
lb r4,0,r2
|
| 8969 |
|
|
sb r4,0,r3
|
| 8970 |
|
|
inx
|
| 8971 |
|
|
iny
|
| 8972 |
|
|
dea
|
| 8973 |
|
|
bne LOAD2
|
| 8974 |
|
|
jsr AUXIN_INIT ; initialize for file input (get the file)
|
| 8975 |
|
|
emm
|
| 8976 |
|
|
cpu W65C02
|
| 8977 |
|
|
; Save off the output vector and switch output to the
|
| 8978 |
|
|
; auxiallry output routine.
|
| 8979 |
|
|
sei
|
| 8980 |
|
|
lda VEC_IN ; save off the output vector to $E0
|
| 8981 |
|
|
sta $E0
|
| 8982 |
|
|
lda VEC_IN+1
|
| 8983 |
|
|
sta $E1
|
| 8984 |
|
|
lda #
|
| 8985 |
|
|
sta VEC_IN
|
| 8986 |
|
|
lda #>AUXIN
|
| 8987 |
|
|
sta VEC_IN+1
|
| 8988 |
|
|
jsr LAB_22B6 ; pop string descriptor from stack
|
| 8989 |
|
|
LOAD4:
|
| 8990 |
|
|
rts
|
| 8991 |
|
|
|
| 8992 |
|
|
SAVE3:
|
| 8993 |
|
|
JSR LAB_EVEZ ; get string parameter
|
| 8994 |
|
|
lda Dtypef
|
| 8995 |
|
|
bpl SAVE4 ; branch if not a string
|
| 8996 |
|
|
ldy #0
|
| 8997 |
|
|
lda (des_pl),y
|
| 8998 |
|
|
sta str_ln
|
| 8999 |
|
|
iny
|
| 9000 |
|
|
lda (des_pl),y
|
| 9001 |
|
|
sta str_pl
|
| 9002 |
|
|
iny
|
| 9003 |
|
|
lda (des_ph),y
|
| 9004 |
|
|
sta str_ph
|
| 9005 |
|
|
nat
|
| 9006 |
|
|
cpu RTF65002
|
| 9007 |
|
|
jsr AUXOUT_INIT ; initialize for file output
|
| 9008 |
|
|
lb r4,str_ph ; r4 = pointer to file name
|
| 9009 |
|
|
asl r4,r4,#8
|
| 9010 |
|
|
orb r4,r4,str_pl
|
| 9011 |
|
|
lda #8 ; 8 words to zero out
|
| 9012 |
|
|
ldx #0 ; the value we want to use
|
| 9013 |
|
|
ldy #FILENAME ; the target address
|
| 9014 |
|
|
stos ; zap the memory
|
| 9015 |
|
|
lda str_ln ; number of bytes to move
|
| 9016 |
|
|
ld r2,r4 ; x = source
|
| 9017 |
|
|
ldy #FILENAME ; y = dest
|
| 9018 |
|
|
SAVE2:
|
| 9019 |
|
|
lb r4,0,r2
|
| 9020 |
|
|
sb r4,0,r3
|
| 9021 |
|
|
inx
|
| 9022 |
|
|
iny
|
| 9023 |
|
|
dea
|
| 9024 |
|
|
bne SAVE2
|
| 9025 |
|
|
|
| 9026 |
|
|
emm
|
| 9027 |
|
|
cpu W65C02
|
| 9028 |
|
|
; Save off the output vector and switch output to the
|
| 9029 |
|
|
; auxiallry output routine.
|
| 9030 |
|
|
sei
|
| 9031 |
|
|
lda VEC_OUT ; save off the output vector to $E0
|
| 9032 |
|
|
sta $E0
|
| 9033 |
|
|
lda VEC_OUT+1
|
| 9034 |
|
|
sta $E1
|
| 9035 |
|
|
lda #
|
| 9036 |
|
|
sta VEC_OUT
|
| 9037 |
|
|
lda #>AUXOUT
|
| 9038 |
|
|
sta VEC_OUT+1
|
| 9039 |
|
|
; Invoke the LIST command
|
| 9040 |
|
|
lda #0
|
| 9041 |
|
|
jsr LAB_LIST
|
| 9042 |
|
|
lda #$1A ; spit out end-of-file marker
|
| 9043 |
|
|
jsr AUXOUT
|
| 9044 |
|
|
; restore the regular output
|
| 9045 |
|
|
lda $E0
|
| 9046 |
|
|
sta VEC_OUT
|
| 9047 |
|
|
lda $E1
|
| 9048 |
|
|
sta VEC_OUT+1
|
| 9049 |
|
|
nat
|
| 9050 |
|
|
cpu RTF65002
|
| 9051 |
|
|
jsr AUXOUT_FLUSH
|
| 9052 |
|
|
emm
|
| 9053 |
|
|
cpu W65C02
|
| 9054 |
|
|
jsr LAB_22B6 ; pop string descriptor from stack
|
| 9055 |
|
|
SAVE4:
|
| 9056 |
|
|
rts
|
| 9057 |
|
|
|
| 9058 |
|
|
cpu rtf65002
|
| 9059 |
|
|
outchar:
|
| 9060 |
|
|
jsr (DisplayChar>>2) ; should not trash char
|
| 9061 |
|
|
rts
|
| 9062 |
|
|
cpu rtf65002
|
| 9063 |
|
|
|
| 9064 |
|
|
ICacheIA816:
|
| 9065 |
|
|
nat
|
| 9066 |
|
|
jsr (ICacheInvalidateAll>>2)
|
| 9067 |
|
|
emm816
|
| 9068 |
|
|
rts
|
| 9069 |
|
|
|
| 9070 |
|
|
;------------------------------------------------------------------------------
|
| 9071 |
|
|
;------------------------------------------------------------------------------
|
| 9072 |
|
|
|
| 9073 |
|
|
ICacheIL816:
|
| 9074 |
|
|
nat
|
| 9075 |
|
|
jsr (ICacheInvalidateLine>>2)
|
| 9076 |
|
|
emm816
|
| 9077 |
|
|
rts
|
| 9078 |
|
|
|
| 9079 |
|
|
;==============================================================================
|
| 9080 |
|
|
;==============================================================================
|
| 9081 |
|
|
SPIMASTER EQU 0xFFDC0500
|
| 9082 |
|
|
SPI_MASTER_VERSION_REG EQU 0x00
|
| 9083 |
|
|
SPI_MASTER_CONTROL_REG EQU 0x01
|
| 9084 |
|
|
SPI_TRANS_TYPE_REG EQU 0x02
|
| 9085 |
|
|
SPI_TRANS_CTRL_REG EQU 0x03
|
| 9086 |
|
|
SPI_TRANS_STATUS_REG EQU 0x04
|
| 9087 |
|
|
SPI_TRANS_ERROR_REG EQU 0x05
|
| 9088 |
|
|
SPI_DIRECT_ACCESS_DATA_REG EQU 0x06
|
| 9089 |
|
|
SPI_SD_SECT_7_0_REG EQU 0x07
|
| 9090 |
|
|
SPI_SD_SECT_15_8_REG EQU 0x08
|
| 9091 |
|
|
SPI_SD_SECT_23_16_REG EQU 0x09
|
| 9092 |
|
|
SPI_SD_SECT_31_24_REG EQU 0x0a
|
| 9093 |
|
|
SPI_RX_FIFO_DATA_REG EQU 0x10
|
| 9094 |
|
|
SPI_RX_FIFO_DATA_COUNT_MSB EQU 0x12
|
| 9095 |
|
|
SPI_RX_FIFO_DATA_COUNT_LSB EQU 0x13
|
| 9096 |
|
|
SPI_RX_FIFO_CTRL_REG EQU 0x14
|
| 9097 |
|
|
SPI_TX_FIFO_DATA_REG EQU 0x20
|
| 9098 |
|
|
SPI_TX_FIFO_CTRL_REG EQU 0x24
|
| 9099 |
|
|
SPI_RESP_BYTE1 EQU 0x30
|
| 9100 |
|
|
SPI_RESP_BYTE2 EQU 0x31
|
| 9101 |
|
|
SPI_RESP_BYTE3 EQU 0x32
|
| 9102 |
|
|
SPI_RESP_BYTE4 EQU 0x33
|
| 9103 |
|
|
SPI_INIT_SD EQU 0x01
|
| 9104 |
|
|
SPI_TRANS_START EQU 0x01
|
| 9105 |
|
|
SPI_TRANS_BUSY EQU 0x01
|
| 9106 |
|
|
SPI_INIT_NO_ERROR EQU 0x00
|
| 9107 |
|
|
SPI_READ_NO_ERROR EQU 0x00
|
| 9108 |
|
|
SPI_WRITE_NO_ERROR EQU 0x00
|
| 9109 |
|
|
RW_READ_SD_BLOCK EQU 0x02
|
| 9110 |
|
|
RW_WRITE_SD_BLOCK EQU 0x03
|
| 9111 |
|
|
;
|
| 9112 |
|
|
; Initialize the SD card
|
| 9113 |
|
|
; Returns
|
| 9114 |
|
|
; acc = 0 if successful, 1 otherwise
|
| 9115 |
|
|
; Z=1 if successful, otherwise Z=0
|
| 9116 |
|
|
;
|
| 9117 |
|
|
message "spi_init"
|
| 9118 |
|
|
spi_init
|
| 9119 |
|
|
lda #SPI_INIT_SD
|
| 9120 |
|
|
sta SPIMASTER+SPI_TRANS_TYPE_REG
|
| 9121 |
|
|
lda #SPI_TRANS_START
|
| 9122 |
|
|
sta SPIMASTER+SPI_TRANS_CTRL_REG
|
| 9123 |
|
|
nop
|
| 9124 |
|
|
spi_init1
|
| 9125 |
|
|
lda SPIMASTER+SPI_TRANS_STATUS_REG
|
| 9126 |
|
|
nop
|
| 9127 |
|
|
nop
|
| 9128 |
|
|
cmp #SPI_TRANS_BUSY
|
| 9129 |
|
|
beq spi_init1
|
| 9130 |
|
|
lda SPIMASTER+SPI_TRANS_ERROR_REG
|
| 9131 |
|
|
and #3
|
| 9132 |
|
|
cmp #SPI_INIT_NO_ERROR
|
| 9133 |
|
|
bne spi_error
|
| 9134 |
|
|
; lda #spi_init_ok_msg
|
| 9135 |
|
|
; jsr DisplayStringB
|
| 9136 |
|
|
lda #0
|
| 9137 |
|
|
rts
|
| 9138 |
|
|
spi_error
|
| 9139 |
|
|
; jsr DisplayByte
|
| 9140 |
|
|
; lda #spi_init_error_msg
|
| 9141 |
|
|
; jsr DisplayStringB
|
| 9142 |
|
|
; lda SPIMASTER+SPI_RESP_BYTE1
|
| 9143 |
|
|
; jsr DisplayByte
|
| 9144 |
|
|
; lda SPIMASTER+SPI_RESP_BYTE2
|
| 9145 |
|
|
; jsr DisplayByte
|
| 9146 |
|
|
; lda SPIMASTER+SPI_RESP_BYTE3
|
| 9147 |
|
|
; jsr DisplayByte
|
| 9148 |
|
|
; lda SPIMASTER+SPI_RESP_BYTE4
|
| 9149 |
|
|
; jsr DisplayByte
|
| 9150 |
|
|
lda #1
|
| 9151 |
|
|
rts
|
| 9152 |
|
|
|
| 9153 |
|
|
spi_delay:
|
| 9154 |
|
|
nop
|
| 9155 |
|
|
nop
|
| 9156 |
|
|
rts
|
| 9157 |
|
|
|
| 9158 |
|
|
|
| 9159 |
|
|
; SPI read sector
|
| 9160 |
|
|
;
|
| 9161 |
|
|
; r1= sector number to read
|
| 9162 |
|
|
; r2= address to place read data
|
| 9163 |
|
|
; Returns:
|
| 9164 |
|
|
; r1 = 0 if successful
|
| 9165 |
|
|
;
|
| 9166 |
|
|
spi_read_sector:
|
| 9167 |
|
|
phx
|
| 9168 |
|
|
phy
|
| 9169 |
|
|
push r4
|
| 9170 |
|
|
|
| 9171 |
|
|
sta SPIMASTER+SPI_SD_SECT_7_0_REG
|
| 9172 |
|
|
lsr r1,r1,#8
|
| 9173 |
|
|
sta SPIMASTER+SPI_SD_SECT_15_8_REG
|
| 9174 |
|
|
lsr r1,r1,#8
|
| 9175 |
|
|
sta SPIMASTER+SPI_SD_SECT_23_16_REG
|
| 9176 |
|
|
lsr r1,r1,#8
|
| 9177 |
|
|
sta SPIMASTER+SPI_SD_SECT_31_24_REG
|
| 9178 |
|
|
|
| 9179 |
|
|
ld r4,#20 ; retry count
|
| 9180 |
|
|
|
| 9181 |
|
|
spi_read_retry:
|
| 9182 |
|
|
; Force the reciever fifo to be empty, in case a prior error leaves it
|
| 9183 |
|
|
; in an unknown state.
|
| 9184 |
|
|
lda #1
|
| 9185 |
|
|
sta SPIMASTER+SPI_RX_FIFO_CTRL_REG
|
| 9186 |
|
|
|
| 9187 |
|
|
lda #RW_READ_SD_BLOCK
|
| 9188 |
|
|
sta SPIMASTER+SPI_TRANS_TYPE_REG
|
| 9189 |
|
|
lda #SPI_TRANS_START
|
| 9190 |
|
|
sta SPIMASTER+SPI_TRANS_CTRL_REG
|
| 9191 |
|
|
nop
|
| 9192 |
|
|
spi_read_sect1:
|
| 9193 |
|
|
lda SPIMASTER+SPI_TRANS_STATUS_REG
|
| 9194 |
|
|
jsr spi_delay ; just a delay between consecutive status reg reads
|
| 9195 |
|
|
cmp #SPI_TRANS_BUSY
|
| 9196 |
|
|
beq spi_read_sect1
|
| 9197 |
|
|
lda SPIMASTER+SPI_TRANS_ERROR_REG
|
| 9198 |
|
|
lsr
|
| 9199 |
|
|
lsr
|
| 9200 |
|
|
and #3
|
| 9201 |
|
|
cmp #SPI_READ_NO_ERROR
|
| 9202 |
|
|
bne spi_read_error
|
| 9203 |
|
|
ldy #512 ; read 512 bytes from fifo
|
| 9204 |
|
|
spi_read_sect2:
|
| 9205 |
|
|
lda SPIMASTER+SPI_RX_FIFO_DATA_REG
|
| 9206 |
|
|
sb r1,0,x
|
| 9207 |
|
|
inx
|
| 9208 |
|
|
dey
|
| 9209 |
|
|
bne spi_read_sect2
|
| 9210 |
|
|
lda #0
|
| 9211 |
|
|
bra spi_read_ret
|
| 9212 |
|
|
spi_read_error:
|
| 9213 |
|
|
dec r4
|
| 9214 |
|
|
bne spi_read_retry
|
| 9215 |
|
|
; jsr DisplayByte
|
| 9216 |
|
|
; lda #spi_read_error_msg
|
| 9217 |
|
|
; jsr DisplayStringB
|
| 9218 |
|
|
lda #1
|
| 9219 |
|
|
spi_read_ret:
|
| 9220 |
|
|
pop r4
|
| 9221 |
|
|
ply
|
| 9222 |
|
|
plx
|
| 9223 |
|
|
rts
|
| 9224 |
|
|
|
| 9225 |
|
|
; SPI write sector
|
| 9226 |
|
|
;
|
| 9227 |
|
|
; r1= sector number to write
|
| 9228 |
|
|
; r2= address to get data from
|
| 9229 |
|
|
; Returns:
|
| 9230 |
|
|
; r1 = 0 if successful
|
| 9231 |
|
|
;
|
| 9232 |
|
|
spi_write_sector:
|
| 9233 |
|
|
phx
|
| 9234 |
|
|
phy
|
| 9235 |
|
|
pha
|
| 9236 |
|
|
; Force the transmitter fifo to be empty, in case a prior error leaves it
|
| 9237 |
|
|
; in an unknown state.
|
| 9238 |
|
|
lda #1
|
| 9239 |
|
|
sta SPIMASTER+SPI_TX_FIFO_CTRL_REG
|
| 9240 |
|
|
nop ; give I/O time to respond
|
| 9241 |
|
|
nop
|
| 9242 |
|
|
|
| 9243 |
|
|
; now fill up the transmitter fifo
|
| 9244 |
|
|
ldy #512
|
| 9245 |
|
|
spi_write_sect1:
|
| 9246 |
|
|
lb r1,0,x
|
| 9247 |
|
|
sta SPIMASTER+SPI_TX_FIFO_DATA_REG
|
| 9248 |
|
|
nop ; give the I/O time to respond
|
| 9249 |
|
|
nop
|
| 9250 |
|
|
inx
|
| 9251 |
|
|
dey
|
| 9252 |
|
|
bne spi_write_sect1
|
| 9253 |
|
|
|
| 9254 |
|
|
; set the sector number in the spi master address registers
|
| 9255 |
|
|
pla
|
| 9256 |
|
|
sta SPIMASTER+SPI_SD_SECT_7_0_REG
|
| 9257 |
|
|
lsr r1,r1,#8
|
| 9258 |
|
|
sta SPIMASTER+SPI_SD_SECT_15_8_REG
|
| 9259 |
|
|
lsr r1,r1,#8
|
| 9260 |
|
|
sta SPIMASTER+SPI_SD_SECT_23_16_REG
|
| 9261 |
|
|
lsr r1,r1,#8
|
| 9262 |
|
|
sta SPIMASTER+SPI_SD_SECT_31_24_REG
|
| 9263 |
|
|
|
| 9264 |
|
|
; issue the write command
|
| 9265 |
|
|
lda #RW_WRITE_SD_BLOCK
|
| 9266 |
|
|
sta SPIMASTER+SPI_TRANS_TYPE_REG
|
| 9267 |
|
|
lda #SPI_TRANS_START
|
| 9268 |
|
|
sta SPIMASTER+SPI_TRANS_CTRL_REG
|
| 9269 |
|
|
nop
|
| 9270 |
|
|
spi_write_sect2:
|
| 9271 |
|
|
lda SPIMASTER+SPI_TRANS_STATUS_REG
|
| 9272 |
|
|
nop ; just a delay between consecutive status reg reads
|
| 9273 |
|
|
nop
|
| 9274 |
|
|
cmp #SPI_TRANS_BUSY
|
| 9275 |
|
|
beq spi_write_sect2
|
| 9276 |
|
|
lda SPIMASTER+SPI_TRANS_ERROR_REG
|
| 9277 |
|
|
lsr r1,r1,#4
|
| 9278 |
|
|
and #3
|
| 9279 |
|
|
cmp #SPI_WRITE_NO_ERROR
|
| 9280 |
|
|
bne spi_write_error
|
| 9281 |
|
|
lda #0
|
| 9282 |
|
|
bra spi_write_ret
|
| 9283 |
|
|
spi_write_error:
|
| 9284 |
|
|
; jsr DisplayByte
|
| 9285 |
|
|
; lda #spi_write_error_msg
|
| 9286 |
|
|
; jsr DisplayStringB
|
| 9287 |
|
|
lda #1
|
| 9288 |
|
|
|
| 9289 |
|
|
spi_write_ret:
|
| 9290 |
|
|
ply
|
| 9291 |
|
|
plx
|
| 9292 |
|
|
rts
|
| 9293 |
|
|
|
| 9294 |
|
|
|
| 9295 |
|
|
cpu W65C816S
|
| 9296 |
|
|
brk_rout:
|
| 9297 |
|
|
phb ;save DB
|
| 9298 |
|
|
phd ;save DP
|
| 9299 |
|
|
rep #%00110000 ;16 bit registers
|
| 9300 |
|
|
pha
|
| 9301 |
|
|
phx
|
| 9302 |
|
|
phy
|
| 9303 |
|
|
jmp (vecbrki) ;indirect vector
|
| 9304 |
|
|
brk1:
|
| 9305 |
|
|
rep #%00110000 ;16 bit registers
|
| 9306 |
|
|
ply
|
| 9307 |
|
|
plx
|
| 9308 |
|
|
pla
|
| 9309 |
|
|
pld
|
| 9310 |
|
|
plb
|
| 9311 |
|
|
rti
|
| 9312 |
|
|
|
| 9313 |
|
|
cpu W65C02
|
| 9314 |
|
|
org $F400
|
| 9315 |
|
|
jmp V__INPT816
|
| 9316 |
|
|
jmp LAB_BYE
|
| 9317 |
|
|
jmp V__OUTP816
|
| 9318 |
|
|
jmp Resched816
|
| 9319 |
|
|
|
| 9320 |
|
|
cpu RTF65002
|
| 9321 |
|
|
org $F500
|
| 9322 |
|
|
jsr (RequestIOFocus>>2)
|
| 9323 |
|
|
jsr (ClearScreen>>2)
|
| 9324 |
|
|
jsr (HomeCursor>>2)
|
| 9325 |
|
|
lda #0 ; turn off keyboard echoing
|
| 9326 |
|
|
jsr (SetKeyboardEcho>>2)
|
| 9327 |
|
|
; trs r0,cc ; turn caches off
|
| 9328 |
|
|
clc
|
| 9329 |
|
|
xce
|
| 9330 |
|
|
cpu W65C816S
|
| 9331 |
|
|
rep #%00110000 ;16 bit registers
|
| 9332 |
|
|
mem 16
|
| 9333 |
|
|
ndx 16
|
| 9334 |
|
|
lda #brk1 ; initialize the break routine vector
|
| 9335 |
|
|
sta vecbrki
|
| 9336 |
|
|
jmp $008000
|
| 9337 |
|
|
|
| 9338 |
|
|
org $FFE6
|
| 9339 |
|
|
dw brk_rout
|
| 9340 |
|
|
|
