URL https://opencores.org/ocsvn/rtf65002/rtf65002/trunk

Subversion Repositories rtf65002

[/] [rtf65002/] [trunk/] [software/] [asm/] [t65002d.asm] - Blame information for rev 26

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UART            EQU             $CF00
XMIT_FUL        EQU             8
 
        cpu     rtf65002
        org $0FFFFE000          ; 8kB ROM
start
        sei
        lda     #0x01                   ; turn on instruction cache
        trs     r1,cc                   ; transfer to cache control reg
        ldx     #$1000                  ; set stack pointer to word address $1000
        txs
        emm                                     ; switch to emulation mode
;------------------------------------------------------------------------------
; 65C02 testing
;------------------------------------------------------------------------------
        cpu     W65C02                  ; tell assembler to use 6502 tables
        ldx     #$FF
        txs
        jsr             putmsg
        db              "C02 Testing Processor", 13, 10, 0
        bra             braok8
        jsr             putmsg
        db              "BRA:F", 13, 10, 0
braok8
        brl             brlok8
        jsr             putmsg
        db              "BRL:F", 13, 10, 0
brlok8
        sec
        bcs             bcsok8
        jsr             putmsg
        db              "BCS:F", 13, 10, 0
bcsok8
        clc
        bcc             bccok8
        jsr             putmsg
        db              "BCC:F", 13, 10, 0
bccok8
        ld              r1,#$00
        beq             beqok8
        jsr             putmsg
        db              "BEQ:F", 13, 10, 0
beqok8
        ld              r1,#$80000000
        bne             bneok8
        jsr             putmsg
        db              "BNE:F", 13, 10, 0
bneok8
        or              r1,r1,#$00
        bmi             bmiok8
        jsr             putmsg
        db              "BMI:F", 13, 10, 0
bmiok8
        eor             r1,r1,#$80000000
        bpl             bplok8
        jsr             putmsg
        db              "BPL:F", 13, 10, 0
bplok8
        ld              r1,#$7fffffff
        add             r1,r1,#$1               ; should give signed overflow
        bvs             bvsok8
        jsr             putmsg
        db              "BVS:F", 13, 10, 0
bvsok8
        clv
        bvc             bvcok
        jsr             putmsg
        db              "BVC:F", 13, 10, 0
bvcok8
 
;--------------------------------------------------------------------------------------
; Native mode tests
;--------------------------------------------------------------------------------------
 
        nat                                     ; switch to native mode
        cpu             rtf65002
        jsr             putmsg3
        db              "65k Testing Processor", 13, 10, 0
 
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; First thing to test is branches. If you can't branch reliably
; then the validity of the remaining tests are in question.
; Test branches and also simultaneously some other simple
; instructions.
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
        sei
 
        bra             braok
        jsr             putmsg3
        db              "BRA:F", 13, 10, 0
braok
        brl             brlok
        jsr             putmsg3
        db              "BRL:F", 13, 10, 0
brlok
        sec
        bcs             bcsok
        jsr             putmsg3
        db              "BCS:F", 13, 10, 0
bcsok
        clc
        bcc             bccok
        jsr             putmsg3
        db              "BCC:F", 13, 10, 0
bccok
        ld              r1,#$00
        beq             beqok
        jsr             putmsg3
        db              "BEQ:F", 13, 10, 0
beqok
        ld              r1,#$80000000
        bne             bneok
        jsr             putmsg3
        db              "BNE:F", 13, 10, 0
bneok
        or              r1,r1,#$00
        bmi             bmiok
        jsr             putmsg3
        db              "BMI:F", 13, 10, 0
bmiok
        eor             r1,r1,#$80000000
        bpl             bplok
        jsr             putmsg3
        db              "BPL:F", 13, 10, 0
bplok
        ld              r1,#$7fffffff
        add             r1,r1,#$1               ; should give signed overflow
        bvs             bvsok
        jsr             putmsg3
        db              "BVS:F", 13, 10, 0
bvsok
        clv
        bvc             bvcok
        jsr             putmsg3
        db              "BVC:F", 13, 10, 0
bvcok
 
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; Compare Instructions
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
        jsr             putmsg3
        db              "test cmp/cpx/cpy", 13, 10, 0
 
        ld              r1,#27                  ; bit 7 = 0
        clc
        cmp             r1,#27
        bcs             cmperr
        bne             cmperr
        bmi             cmperr
        lda             #$A1000000
        cmp             r1,#20000000
        bpl             cmperr          ; should be neg.
        sec
        lda             #10
        cmp             r1,#20                  ; should be a borrow here
        bcc             cmperr
        clv
        lda             #$80000000              ; -128 - 32 = -160 should overflow
        cmp             r1,#$20000000           ; compare doesn't affect overflow
        bvs             cmperr
        bvc             cmpok
 
cmperr
        jsr             putmsg
        db              "CMP:F", 13, 10, 0
 
cmpok
        ldx             #27
        clc
        cpx             #27
        bcs             cpxerr
        bne             cpxerr
        bmi             cpxerr
        ldx             #$A1000000
        cpx             #20000000
        bpl             cpxerr
        ldx             #10
        cpx             #20                     ; should be a borrow here
        bcc             cpxerr
        clv
        ldx             #$80000000              ; -128 - 32 = -160 should overflow
        cpx             #$20000000              ; but cpx shouldn't change overflow
        bvs             cpxerr
        bvc             cpxok
 
cpxerr
        jsr             putmsg
        db              "CPX:F", 13, 10, 0
 
cpxok
        ldy             #27
        clc
        cpy             #27
        bcs             cpyerr
        bne             cpyerr
        bmi             cpyerr
        ldy             #$B0000000
        cpy             #20000000
        bpl             cpyerr
        ldy             #10
        cpy             #20                     ; should be a borrow here
        bcc             cpyerr
        clv
        ldy             #$80000000              ; -128 - 32 = -160 should overflow
        cpy             #$20000000              ; but cpy shouldn't change overflow
        bvs             cpyerr
        bvc             cpyok
 
cpyerr
        jsr             putmsg
        db              "CPY:F", 13, 10, 0
 
cpyok
 
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; Accumulator ops
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
        jsr             putmsg
        db              "Test Acc ops", 13, 10, 0
; OR
        clv
        clc
        lda             #0
        or              r1,r1,#0
        bne             oraerr
        bvs             oraerr
        bmi             oraerr
        bcs             oraerr
        sec
        or              r1,r1,#0
        bcc             oraerr
        or              r1,r1,#$55
        beq             oraerr
        cmp             r1,#$55
        bne             oraerr
        or              r1,r1,#$aa
        cmp             r1,#$ff
        bne             oraerr
        beq             oraok
 
oraerr
        jsr             putmsg
        db              "ORA:F", 13, 10, 0
 
oraok
; SUB
        lda             #27                     ; bit 7 = 0
        sec
        sub             r1,r1,#27
        bcs             sbcerr1
        bne             sbcerr3
        bmi             sbcerr2
        bvs             sbcerr4
        lda             #$A1000000
        sub             r1,r1,#$20000000
        bpl             sbcerr2         ; should be neg.
        cmp             r1,#$81000000
        bne             sbcerr3
        sec
        lda             #10
        sub             r1,r1,#20                       ; should be a borrow here
        bcc             sbcerr1
        clv
        lda             #$80000000              ; -128 - 32 = -160 should overflow
        sub             r1,r1,#$20000000                ;
        bvc             sbcerr4
        bvs             sbcok
 
sbcerr
        bsr             putmsg
        db              "SBC:F", 13, 10, 0
        jmp             sbcok
 
sbcerr1
        bsr             putmsg
        db              "SBC:C", 13, 10, 0
        jmp             sbcok
 
sbcerr2
        jsr             putmsg
        db              "SBC2:N", 13, 10, 0
        jmp             sbcok
 
sbcerr3
        jsr             putmsg
        db              "SBC3:Z", 13, 10, 0
        jmp             sbcok
 
sbcerr4
        jsr             putmsg
        db              "SBC:V", 13, 10, 0
        jmp             sbcok
 
sbcok
 
 
; BIT / AND
 
        clv
        lda             #$ffFFFFFF
        bit             r1,n5555
        bvc             biterr
        bmi             biterr
        bit             r1,nAAAA
        bvs             biterr
        bpl             biterr
        bmi             bitok
 
biterr
        jsr             putmsg
        db              "BIT:F", 13, 10, 0
 
bitok
 
; PLP
 
        lda             #$DFFFFFFF      ; leave em bit clear
        pha
        plp
        bpl     plperr
        bvc             plperr
        bne             plperr
        bcc             plperr
        bcs             plpok
 
plperr
        jsr             putmsg
        db              "PLP:F", 13, 10, 0
 
plpok
 
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; Load
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
        jsr             putmsg
        db              "Test lda/ldx/ldy", 13, 10, 0
 
; lda
 
        clc
        lda             #0
        bne             ldaerr
        bmi             ldaerr
        bcs             ldaerr
        lda             #$80000000
        beq             ldaerr
        bpl             ldaerr
 
        lda             #$00
        st              r1,$800
        bne             ldaerr
        bmi             ldaerr
        bcs             ldaerr
 
        lda             #-1
        lda             $800
        bne             ldaerr
        bmi             ldaerr
        bcs             ldaerr
 
        cmp             r1,#0
        bne             ldaerr
 
        sec
        lda             #-1
        st              r1,$800
        beq             ldaerr
        bpl             ldaerr
        bcc             ldaerr
 
        lda             #0
        lda             $800
        beq             ldaerr
        bpl             ldaerr
        bcc             ldaerr
 
        cmp             r1,#-1
        beq             ldaok
 
ldaerr
        jsr             putmsg
        db              "LDA:F", 13, 10, 0
 
ldaok
 
 
; ldx
 
        clc
        lda             #$80000000              ; z = 0, n = 1
        ldx             #0
        bcs             ldxerr
        bne             ldxerr
        bmi             ldxerr
 
        stx             $800
        bne             ldxerr
        bmi             ldxerr
        bcs             ldxerr
 
        ldx             #-1
        ldx             $800
        bne             ldxerr
        bmi             ldxerr
        bcs             ldxerr
 
        cpx             #0
        bne             ldxerr
 
        sec
        ldx             #-1
        stx             $800
        beq             ldxerr
        bpl             ldxerr
        bcc             ldxerr
 
        ldx             #0
        ldx             $800
        beq             ldxerr
        bpl             ldxerr
        bcc             ldxerr
 
        cpx             #-1
        beq             ldxok
 
ldxerr
        jsr             putmsg
        db              "LDX:F", 13, 10, 0
 
 
; ldy
 
ldxok
        clc
        lda             #$80000000              ; z = 0, n = 1
        ldy             #0
        bcs             ldyerr
        bne             ldyerr
        bmi             ldyerr
 
        sty             $800
        bne             ldyerr
        bmi             ldyerr
        bcs             ldyerr
 
        ldy             #-1
        ldy             $800
        bne             ldyerr
        bmi             ldyerr
        bcs             ldyerr
 
        cpy             #0
        bne             ldyerr
 
        sec
        ldy             #-1
        sty             $800
        beq             ldyerr
        bpl             ldyerr
        bcc             ldyerr
 
        ldy             #0
        ldy             $800
        beq             ldyerr
        bpl             ldyerr
        bcc             ldyerr
 
        cpy             #-1
        beq             ldyok
 
ldyerr
        jsr             putmsg
        db              "LDY:F", 13, 10, 0
 
ldyok
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; Test register transfers
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
        jsr             putmsg
        db              "Test tax/tay/txa/tya/tsx/txs", 13, 10, 0
 
; tax
 
        clc
        lda             #0
        ldx             #$80000000              ; z = 0, n = 1
        tax
        bcs             taxerr
        bmi             taxerr
        bne             taxerr
 
        txa
        bne             taxerr
 
        lda             #-1
        sec
        ldx             #0
        tax
        bcc             taxerr
        bpl             taxerr
        beq             taxerr
 
        txa
        cmp             r1,#-1
        beq             taxok
 
taxerr
        jsr             putmsg
        db              "TAX:F", 13, 10, 0
taxok
 
; tay
 
        clc
        lda             #0
        ldy             #$80000000                      ; z = 0, n = 1
        tay
        bcs             tayerr
        bmi             tayerr
        bne             tayerr
 
        tya
        bne             tayerr
 
        lda             #-1
        sec
        ldy             #0
        tay
        bcc             tayerr
        bpl             tayerr
        beq             tayerr
 
        tya
        cmp             r1,#-1
        beq             tayok
 
tayerr
        jsr             putmsg
        db              "TAY:F", 13, 10, 0
tayok
 
 
; txs
 
        ldx             #15
        txs
        ldx             #87
        tsx
        cpx             #15
        beq             txsok
        ldx             #$1000
        txs
        jsr             putmsg
        db              "TSX:F", 13, 10, 0
txsok
        ldx             #87
        txa
        cmp             r1,#87
        beq             txaok
        jsr             putmsg
        db              "TXA:F", 13, 10, 0
txaok
        tay
        cpy             #87
        beq             tayok1
        jsr             putmsg
        db              "TAY:F", 13, 10, 0
tayok1
        tya
        beq             tyaerr
        bmi             tyaerr
        cmp             r1,#87
        beq             tyaok
tyaerr
        jsr             putmsg
        db              "TYA:F", 13, 10, 0
tyaok
 
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; Increment / Decrement
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
        jsr             putmsg
        db              "Test inx/dex/iny/dey/ina/dea/inc/dec", 13, 10, 0
 
        ldx             #$FFFFFFFE
        clc
        lda             #0
        inx
        bcs             inxerr
        beq             inxerr
        bpl             inxerr
 
        cpx             #$ffFFFFFF
        bne             inxerr
 
        sec
        lda             #$80
        inx
        bcc             inxerr
        bne             inxerr
        bmi             inxerr
 
        cpx             #0
        bne             inxerr
 
        clc
;inxl1                          ; test loop
;       inx
;       bcs             inxerr
;       bne             inxl1
 
        sec
;inxl2
;       inx
;       bcc             inxerr
;       bne             inxl2
 
        beq             inxok
 
inxerr
        jsr             putmsg
        db              "INX:F", 13, 10, 0
 
inxok
 
;       dex
 
        ldx             #2
        clc
        lda             #0
        dex
        bcs             dexerr
        beq             dexerr
        bmi             dexerr
 
        cpx             #1
        bne             dexerr
 
        sec
        lda             #$80
        dex
        bcc             dexerr
        bne             dexerr
        bmi             dexerr
 
        cpx             #0
        bne             dexerr
 
        lda             #0
        dex
        beq             dexerr
        bpl             dexerr
 
        cpx             #$ffffffff
        bne             dexerr
 
        clc
;dexl1
;       dex
;       bcs             dexerr
;       bne             dexl1
 
;       sec
dexl2
;       dex
;       bcc             dexerr
;       bne             dexl2
 
        beq             dexok
 
dexerr
        jsr             putmsg
        db              "DEX:F", 13, 10, 0
 
dexok
 
; iny
 
        ldy             #$FFFFFFFE
        clc
        add             r1,r1,#0
        iny
        bcs             inyerr
        beq             inyerr
        bpl             inyerr
 
        cpy             #$ffffffff
        bne             inyerr
 
        sec
        lda             #$80
        iny
        bcc             inyerr
        bne             inyerr
        bmi             inyerr
 
        cpy             #0
        bne             inyerr
 
        clc
inyl1                           ; test loop
;       iny
;       bcs             inyerr
;       bne             inyl1
 
        sec
inyl2
;       iny
;       bcc             inyerr
;       bne             inyl2
 
        beq             inyok
 
inyerr
        jsr             putmsg
        db              "INY:F", 13, 10, 0
 
 
;       dey
 
inyok
 
        ldy             #2
        clc
        lda             #0
        dey
        bcs             deyerr
        beq             deyerr
        bmi             deyerr
 
        cpy             #1
        bne             deyerr
 
        sec
        lda             #$80
        dey
        bcc             deyerr
        bne             deyerr
        bmi             deyerr
 
        cpy             #0
        bne             deyerr
 
        lda             #0
        dey
        beq             deyerr
        bpl             deyerr
 
        cpy             #$ffffffff
        bne             deyerr
 
;       clc
deyl1
;       dey
;       bcs             deyerr
;       bne             deyl1
 
;       sec
deyl2
;       dey
;       bcc             deyerr
;       bne             deyl2
 
        bra             deyok
 
deyerr
        jsr             putmsg
        db              "DEY:F", 13, 10, 0
 
deyok
 
 
        lda             #1
        ina
        cmp             r1,#2
        beq             inaok
 
        jsr             putmsg
        db              "INA:F", 13, 10, 0
 
inaok
 
        lda             #2
        dea
        cmp             r1,#1
        beq             deaok
 
        jsr             putmsg
        db              "DEA:F", 13, 10, 0
 
deaok
 
 
        stp
 
putmsg
putmsg3
        plx                             ; pop the return address off the stack
pm5
        lb              r1,$0,x ; load byte into accumulator
        inx
        ora             #0              ; test for end of string
        beq             pm6
        bsr             putSer
        bra             pm5
pm6
        jmp             (x)             ; return to next code byte
 
; put character to serial port
; test and,bne,pha,pla,sta,lda,rts
 
putSer
        pha                                     ; temporarily save character
ps1
        lb              r1,UART+1               ; get serial port status
        and             #XMIT_FUL       ; is it full ?
        bne             ps1                     ; If full then wait
        pla                                     ; get back the char to write
        sb              r1,UART         ; write it to the xmit register
        rts
 
nmirout
        rti
 
        align   4
n5555
        dw              $55555555
nAAAA
        dw              $AAAAAAAA
 
        dw              12
        dw              34
 
        org $0FFFFFFF4          ; NMI vector
        dw      nmirout
 
        org     $0FFFFFFF8              ; reset vector, native mode
        dw      start

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Subversion Repositories rtf65002

[/] [rtf65002/] [trunk/] [software/] [asm/] [t65002d.asm] - Blame information for rev 26

Line No.	Rev	Author	Line
1	4	robfinch	`UART EQU $CF00`
2			`XMIT_FUL EQU 8`
3
4			`cpu rtf65002`
5			`org $0FFFFE000 ; 8kB ROM`
6			`start`
7			`sei`
8			`lda #0x01 ; turn on instruction cache`
9			`trs r1,cc ; transfer to cache control reg`
10			`ldx #$1000 ; set stack pointer to word address $1000`
11			`txs`
12			`emm ; switch to emulation mode`
13			`;------------------------------------------------------------------------------`
14			`; 65C02 testing`
15			`;------------------------------------------------------------------------------`
16			`cpu W65C02 ; tell assembler to use 6502 tables`
17			`ldx #$FF`
18			`txs`
19			`jsr putmsg`
20			`db "C02 Testing Processor", 13, 10, 0`
21			`bra braok8`
22			`jsr putmsg`
23			`db "BRA:F", 13, 10, 0`
24			`braok8`
25			`brl brlok8`
26			`jsr putmsg`
27			`db "BRL:F", 13, 10, 0`
28			`brlok8`
29			`sec`
30			`bcs bcsok8`
31			`jsr putmsg`
32			`db "BCS:F", 13, 10, 0`
33			`bcsok8`
34			`clc`
35			`bcc bccok8`
36			`jsr putmsg`
37			`db "BCC:F", 13, 10, 0`
38			`bccok8`
39			`ld r1,#$00`
40			`beq beqok8`
41			`jsr putmsg`
42			`db "BEQ:F", 13, 10, 0`
43			`beqok8`
44			`ld r1,#$80000000`
45			`bne bneok8`
46			`jsr putmsg`
47			`db "BNE:F", 13, 10, 0`
48			`bneok8`
49			`or r1,r1,#$00`
50			`bmi bmiok8`
51			`jsr putmsg`
52			`db "BMI:F", 13, 10, 0`
53			`bmiok8`
54			`eor r1,r1,#$80000000`
55			`bpl bplok8`
56			`jsr putmsg`
57			`db "BPL:F", 13, 10, 0`
58			`bplok8`
59			`ld r1,#$7fffffff`
60			`add r1,r1,#$1 ; should give signed overflow`
61			`bvs bvsok8`
62			`jsr putmsg`
63			`db "BVS:F", 13, 10, 0`
64			`bvsok8`
65			`clv`
66			`bvc bvcok`
67			`jsr putmsg`
68			`db "BVC:F", 13, 10, 0`
69			`bvcok8`
70
71			`;--------------------------------------------------------------------------------------`
72			`; Native mode tests`
73			`;--------------------------------------------------------------------------------------`
74
75			`nat ; switch to native mode`
76			`cpu rtf65002`
77			`jsr putmsg3`
78			`db "65k Testing Processor", 13, 10, 0`
79
80			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
81			`; First thing to test is branches. If you can't branch reliably`
82			`; then the validity of the remaining tests are in question.`
83			`; Test branches and also simultaneously some other simple`
84			`; instructions.`
85			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
86
87			`sei`
88
89			`bra braok`
90			`jsr putmsg3`
91			`db "BRA:F", 13, 10, 0`
92			`braok`
93			`brl brlok`
94			`jsr putmsg3`
95			`db "BRL:F", 13, 10, 0`
96			`brlok`
97			`sec`
98			`bcs bcsok`
99			`jsr putmsg3`
100			`db "BCS:F", 13, 10, 0`
101			`bcsok`
102			`clc`
103			`bcc bccok`
104			`jsr putmsg3`
105			`db "BCC:F", 13, 10, 0`
106			`bccok`
107			`ld r1,#$00`
108			`beq beqok`
109			`jsr putmsg3`
110			`db "BEQ:F", 13, 10, 0`
111			`beqok`
112			`ld r1,#$80000000`
113			`bne bneok`
114			`jsr putmsg3`
115			`db "BNE:F", 13, 10, 0`
116			`bneok`
117			`or r1,r1,#$00`
118			`bmi bmiok`
119			`jsr putmsg3`
120			`db "BMI:F", 13, 10, 0`
121			`bmiok`
122			`eor r1,r1,#$80000000`
123			`bpl bplok`
124			`jsr putmsg3`
125			`db "BPL:F", 13, 10, 0`
126			`bplok`
127			`ld r1,#$7fffffff`
128			`add r1,r1,#$1 ; should give signed overflow`
129			`bvs bvsok`
130			`jsr putmsg3`
131			`db "BVS:F", 13, 10, 0`
132			`bvsok`
133			`clv`
134			`bvc bvcok`
135			`jsr putmsg3`
136			`db "BVC:F", 13, 10, 0`
137			`bvcok`
138
139			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
140			`; Compare Instructions`
141			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
142
143			`jsr putmsg3`
144			`db "test cmp/cpx/cpy", 13, 10, 0`
145
146			`ld r1,#27 ; bit 7 = 0`
147			`clc`
148			`cmp r1,#27`
149			`bcs cmperr`
150			`bne cmperr`
151			`bmi cmperr`
152			`lda #$A1000000`
153			`cmp r1,#20000000`
154			`bpl cmperr ; should be neg.`
155			`sec`
156			`lda #10`
157			`cmp r1,#20 ; should be a borrow here`
158			`bcc cmperr`
159			`clv`
160			`lda #$80000000 ; -128 - 32 = -160 should overflow`
161			`cmp r1,#$20000000 ; compare doesn't affect overflow`
162			`bvs cmperr`
163			`bvc cmpok`
164
165			`cmperr`
166			`jsr putmsg`
167			`db "CMP:F", 13, 10, 0`
168
169			`cmpok`
170			`ldx #27`
171			`clc`
172			`cpx #27`
173			`bcs cpxerr`
174			`bne cpxerr`
175			`bmi cpxerr`
176			`ldx #$A1000000`
177			`cpx #20000000`
178			`bpl cpxerr`
179			`ldx #10`
180			`cpx #20 ; should be a borrow here`
181			`bcc cpxerr`
182			`clv`
183			`ldx #$80000000 ; -128 - 32 = -160 should overflow`
184			`cpx #$20000000 ; but cpx shouldn't change overflow`
185			`bvs cpxerr`
186			`bvc cpxok`
187
188			`cpxerr`
189			`jsr putmsg`
190			`db "CPX:F", 13, 10, 0`
191
192			`cpxok`
193			`ldy #27`
194			`clc`
195			`cpy #27`
196			`bcs cpyerr`
197			`bne cpyerr`
198			`bmi cpyerr`
199			`ldy #$B0000000`
200			`cpy #20000000`
201			`bpl cpyerr`
202			`ldy #10`
203			`cpy #20 ; should be a borrow here`
204			`bcc cpyerr`
205			`clv`
206			`ldy #$80000000 ; -128 - 32 = -160 should overflow`
207			`cpy #$20000000 ; but cpy shouldn't change overflow`
208			`bvs cpyerr`
209			`bvc cpyok`
210
211			`cpyerr`
212			`jsr putmsg`
213			`db "CPY:F", 13, 10, 0`
214
215			`cpyok`
216
217			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
218			`; Accumulator ops`
219			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
220
221			`jsr putmsg`
222			`db "Test Acc ops", 13, 10, 0`
223			`; OR`
224			`clv`
225			`clc`
226			`lda #0`
227			`or r1,r1,#0`
228			`bne oraerr`
229			`bvs oraerr`
230			`bmi oraerr`
231			`bcs oraerr`
232			`sec`
233			`or r1,r1,#0`
234			`bcc oraerr`
235			`or r1,r1,#$55`
236			`beq oraerr`
237			`cmp r1,#$55`
238			`bne oraerr`
239			`or r1,r1,#$aa`
240			`cmp r1,#$ff`
241			`bne oraerr`
242			`beq oraok`
243
244			`oraerr`
245			`jsr putmsg`
246			`db "ORA:F", 13, 10, 0`
247
248			`oraok`
249			`; SUB`
250			`lda #27 ; bit 7 = 0`
251			`sec`
252			`sub r1,r1,#27`
253			`bcs sbcerr1`
254			`bne sbcerr3`
255			`bmi sbcerr2`
256			`bvs sbcerr4`
257			`lda #$A1000000`
258			`sub r1,r1,#$20000000`
259			`bpl sbcerr2 ; should be neg.`
260			`cmp r1,#$81000000`
261			`bne sbcerr3`
262			`sec`
263			`lda #10`
264			`sub r1,r1,#20 ; should be a borrow here`
265			`bcc sbcerr1`
266			`clv`
267			`lda #$80000000 ; -128 - 32 = -160 should overflow`
268			`sub r1,r1,#$20000000 ;`
269			`bvc sbcerr4`
270			`bvs sbcok`
271
272			`sbcerr`
273			`bsr putmsg`
274			`db "SBC:F", 13, 10, 0`
275			`jmp sbcok`
276
277			`sbcerr1`
278			`bsr putmsg`
279			`db "SBC:C", 13, 10, 0`
280			`jmp sbcok`
281
282			`sbcerr2`
283			`jsr putmsg`
284			`db "SBC2:N", 13, 10, 0`
285			`jmp sbcok`
286
287			`sbcerr3`
288			`jsr putmsg`
289			`db "SBC3:Z", 13, 10, 0`
290			`jmp sbcok`
291
292			`sbcerr4`
293			`jsr putmsg`
294			`db "SBC:V", 13, 10, 0`
295			`jmp sbcok`
296
297			`sbcok`
298
299
300			`; BIT / AND`
301
302			`clv`
303			`lda #$ffFFFFFF`
304			`bit r1,n5555`
305			`bvc biterr`
306			`bmi biterr`
307			`bit r1,nAAAA`
308			`bvs biterr`
309			`bpl biterr`
310			`bmi bitok`
311
312			`biterr`
313			`jsr putmsg`
314			`db "BIT:F", 13, 10, 0`
315
316			`bitok`
317
318			`; PLP`
319
320			`lda #$DFFFFFFF ; leave em bit clear`
321			`pha`
322			`plp`
323			`bpl plperr`
324			`bvc plperr`
325			`bne plperr`
326			`bcc plperr`
327			`bcs plpok`
328
329			`plperr`
330			`jsr putmsg`
331			`db "PLP:F", 13, 10, 0`
332
333			`plpok`
334
335			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
336			`; Load`
337			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
338
339			`jsr putmsg`
340			`db "Test lda/ldx/ldy", 13, 10, 0`
341
342			`; lda`
343
344			`clc`
345			`lda #0`
346			`bne ldaerr`
347			`bmi ldaerr`
348			`bcs ldaerr`
349			`lda #$80000000`
350			`beq ldaerr`
351			`bpl ldaerr`
352
353			`lda #$00`
354			`st r1,$800`
355			`bne ldaerr`
356			`bmi ldaerr`
357			`bcs ldaerr`
358
359			`lda #-1`
360			`lda $800`
361			`bne ldaerr`
362			`bmi ldaerr`
363			`bcs ldaerr`
364
365			`cmp r1,#0`
366			`bne ldaerr`
367
368			`sec`
369			`lda #-1`
370			`st r1,$800`
371			`beq ldaerr`
372			`bpl ldaerr`
373			`bcc ldaerr`
374
375			`lda #0`
376			`lda $800`
377			`beq ldaerr`
378			`bpl ldaerr`
379			`bcc ldaerr`
380
381			`cmp r1,#-1`
382			`beq ldaok`
383
384			`ldaerr`
385			`jsr putmsg`
386			`db "LDA:F", 13, 10, 0`
387
388			`ldaok`
389
390
391			`; ldx`
392
393			`clc`
394			`lda #$80000000 ; z = 0, n = 1`
395			`ldx #0`
396			`bcs ldxerr`
397			`bne ldxerr`
398			`bmi ldxerr`
399
400			`stx $800`
401			`bne ldxerr`
402			`bmi ldxerr`
403			`bcs ldxerr`
404
405			`ldx #-1`
406			`ldx $800`
407			`bne ldxerr`
408			`bmi ldxerr`
409			`bcs ldxerr`
410
411			`cpx #0`
412			`bne ldxerr`
413
414			`sec`
415			`ldx #-1`
416			`stx $800`
417			`beq ldxerr`
418			`bpl ldxerr`
419			`bcc ldxerr`
420
421			`ldx #0`
422			`ldx $800`
423			`beq ldxerr`
424			`bpl ldxerr`
425			`bcc ldxerr`
426
427			`cpx #-1`
428			`beq ldxok`
429
430			`ldxerr`
431			`jsr putmsg`
432			`db "LDX:F", 13, 10, 0`
433
434
435			`; ldy`
436
437			`ldxok`
438			`clc`
439			`lda #$80000000 ; z = 0, n = 1`
440			`ldy #0`
441			`bcs ldyerr`
442			`bne ldyerr`
443			`bmi ldyerr`
444
445			`sty $800`
446			`bne ldyerr`
447			`bmi ldyerr`
448			`bcs ldyerr`
449
450			`ldy #-1`
451			`ldy $800`
452			`bne ldyerr`
453			`bmi ldyerr`
454			`bcs ldyerr`
455
456			`cpy #0`
457			`bne ldyerr`
458
459			`sec`
460			`ldy #-1`
461			`sty $800`
462			`beq ldyerr`
463			`bpl ldyerr`
464			`bcc ldyerr`
465
466			`ldy #0`
467			`ldy $800`
468			`beq ldyerr`
469			`bpl ldyerr`
470			`bcc ldyerr`
471
472			`cpy #-1`
473			`beq ldyok`
474
475			`ldyerr`
476			`jsr putmsg`
477			`db "LDY:F", 13, 10, 0`
478
479			`ldyok`
480			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
481			`; Test register transfers`
482			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
483
484			`jsr putmsg`
485			`db "Test tax/tay/txa/tya/tsx/txs", 13, 10, 0`
486
487			`; tax`
488
489			`clc`
490			`lda #0`
491			`ldx #$80000000 ; z = 0, n = 1`
492			`tax`
493			`bcs taxerr`
494			`bmi taxerr`
495			`bne taxerr`
496
497			`txa`
498			`bne taxerr`
499
500			`lda #-1`
501			`sec`
502			`ldx #0`
503			`tax`
504			`bcc taxerr`
505			`bpl taxerr`
506			`beq taxerr`
507
508			`txa`
509			`cmp r1,#-1`
510			`beq taxok`
511
512			`taxerr`
513			`jsr putmsg`
514			`db "TAX:F", 13, 10, 0`
515			`taxok`
516
517			`; tay`
518
519			`clc`
520			`lda #0`
521			`ldy #$80000000 ; z = 0, n = 1`
522			`tay`
523			`bcs tayerr`
524			`bmi tayerr`
525			`bne tayerr`
526
527			`tya`
528			`bne tayerr`
529
530			`lda #-1`
531			`sec`
532			`ldy #0`
533			`tay`
534			`bcc tayerr`
535			`bpl tayerr`
536			`beq tayerr`
537
538			`tya`
539			`cmp r1,#-1`
540			`beq tayok`
541
542			`tayerr`
543			`jsr putmsg`
544			`db "TAY:F", 13, 10, 0`
545			`tayok`
546
547
548			`; txs`
549
550			`ldx #15`
551			`txs`
552			`ldx #87`
553			`tsx`
554			`cpx #15`
555			`beq txsok`
556			`ldx #$1000`
557			`txs`
558			`jsr putmsg`
559			`db "TSX:F", 13, 10, 0`
560			`txsok`
561			`ldx #87`
562			`txa`
563			`cmp r1,#87`
564			`beq txaok`
565			`jsr putmsg`
566			`db "TXA:F", 13, 10, 0`
567			`txaok`
568			`tay`
569			`cpy #87`
570			`beq tayok1`
571			`jsr putmsg`
572			`db "TAY:F", 13, 10, 0`
573			`tayok1`
574			`tya`
575			`beq tyaerr`
576			`bmi tyaerr`
577			`cmp r1,#87`
578			`beq tyaok`
579			`tyaerr`
580			`jsr putmsg`
581			`db "TYA:F", 13, 10, 0`
582			`tyaok`
583
584			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
585			`; Increment / Decrement`
586			`;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
587
588			`jsr putmsg`
589			`db "Test inx/dex/iny/dey/ina/dea/inc/dec", 13, 10, 0`
590
591			`ldx #$FFFFFFFE`
592			`clc`
593			`lda #0`
594			`inx`
595			`bcs inxerr`
596			`beq inxerr`
597			`bpl inxerr`
598
599			`cpx #$ffFFFFFF`
600			`bne inxerr`
601
602			`sec`
603			`lda #$80`
604			`inx`
605			`bcc inxerr`
606			`bne inxerr`
607			`bmi inxerr`
608
609			`cpx #0`
610			`bne inxerr`
611
612			`clc`
613			`;inxl1 ; test loop`
614			`; inx`
615			`; bcs inxerr`
616			`; bne inxl1`
617
618			`sec`
619			`;inxl2`
620			`; inx`
621			`; bcc inxerr`
622			`; bne inxl2`
623
624			`beq inxok`
625
626			`inxerr`
627			`jsr putmsg`
628			`db "INX:F", 13, 10, 0`
629
630			`inxok`
631
632			`; dex`
633
634			`ldx #2`
635			`clc`
636			`lda #0`
637			`dex`
638			`bcs dexerr`
639			`beq dexerr`
640			`bmi dexerr`
641
642			`cpx #1`
643			`bne dexerr`
644
645			`sec`
646			`lda #$80`
647			`dex`
648			`bcc dexerr`
649			`bne dexerr`
650			`bmi dexerr`
651
652			`cpx #0`
653			`bne dexerr`
654
655			`lda #0`
656			`dex`
657			`beq dexerr`
658			`bpl dexerr`
659
660			`cpx #$ffffffff`
661			`bne dexerr`
662
663			`clc`
664			`;dexl1`
665			`; dex`
666			`; bcs dexerr`
667			`; bne dexl1`
668
669			`; sec`
670			`dexl2`
671			`; dex`
672			`; bcc dexerr`
673			`; bne dexl2`
674
675			`beq dexok`
676
677			`dexerr`
678			`jsr putmsg`
679			`db "DEX:F", 13, 10, 0`
680
681			`dexok`
682
683			`; iny`
684
685			`ldy #$FFFFFFFE`
686			`clc`
687			`add r1,r1,#0`
688			`iny`
689			`bcs inyerr`
690			`beq inyerr`
691			`bpl inyerr`
692
693			`cpy #$ffffffff`
694			`bne inyerr`
695
696			`sec`
697			`lda #$80`
698			`iny`
699			`bcc inyerr`
700			`bne inyerr`
701			`bmi inyerr`
702
703			`cpy #0`
704			`bne inyerr`
705
706			`clc`
707			`inyl1 ; test loop`
708			`; iny`
709			`; bcs inyerr`
710			`; bne inyl1`
711
712			`sec`
713			`inyl2`
714			`; iny`
715			`; bcc inyerr`
716			`; bne inyl2`
717
718			`beq inyok`
719
720			`inyerr`
721			`jsr putmsg`
722			`db "INY:F", 13, 10, 0`
723
724
725			`; dey`
726
727			`inyok`
728
729			`ldy #2`
730			`clc`
731			`lda #0`
732			`dey`
733			`bcs deyerr`
734			`beq deyerr`
735			`bmi deyerr`
736
737			`cpy #1`
738			`bne deyerr`
739
740			`sec`
741			`lda #$80`
742			`dey`
743			`bcc deyerr`
744			`bne deyerr`
745			`bmi deyerr`
746
747			`cpy #0`
748			`bne deyerr`
749
750			`lda #0`
751			`dey`
752			`beq deyerr`
753			`bpl deyerr`
754
755			`cpy #$ffffffff`
756			`bne deyerr`
757
758			`; clc`
759			`deyl1`
760			`; dey`
761			`; bcs deyerr`
762			`; bne deyl1`
763
764			`; sec`
765			`deyl2`
766			`; dey`
767			`; bcc deyerr`
768			`; bne deyl2`
769
770			`bra deyok`
771
772			`deyerr`
773			`jsr putmsg`
774			`db "DEY:F", 13, 10, 0`
775
776			`deyok`
777
778
779			`lda #1`
780			`ina`
781			`cmp r1,#2`
782			`beq inaok`
783
784			`jsr putmsg`
785			`db "INA:F", 13, 10, 0`
786
787			`inaok`
788
789			`lda #2`
790			`dea`
791			`cmp r1,#1`
792			`beq deaok`
793
794			`jsr putmsg`
795			`db "DEA:F", 13, 10, 0`
796
797			`deaok`
798
799
800			`stp`
801
802			`putmsg`
803			`putmsg3`
804			`plx ; pop the return address off the stack`
805			`pm5`
806			`lb r1,$0,x ; load byte into accumulator`
807			`inx`
808			`ora #0 ; test for end of string`
809			`beq pm6`
810			`bsr putSer`
811			`bra pm5`
812			`pm6`
813			`jmp (x) ; return to next code byte`
814
815			`; put character to serial port`
816			`; test and,bne,pha,pla,sta,lda,rts`
817
818			`putSer`
819			`pha ; temporarily save character`
820			`ps1`
821			`lb r1,UART+1 ; get serial port status`
822			`and #XMIT_FUL ; is it full ?`
823			`bne ps1 ; If full then wait`
824			`pla ; get back the char to write`
825			`sb r1,UART ; write it to the xmit register`
826			`rts`
827
828			`nmirout`
829			`rti`
830
831			`align 4`
832			`n5555`
833			`dw $55555555`
834			`nAAAA`
835			`dw $AAAAAAAA`
836
837			`dw 12`
838			`dw 34`
839
840			`org $0FFFFFFF4 ; NMI vector`
841			`dw nmirout`
842
843			`org $0FFFFFFF8 ; reset vector, native mode`
844			`dw start`