| 1 |
2 |
sybreon |
ORG 0
|
| 2 |
|
|
DC.W 0,STACK ;RESET: initial SSP
|
| 3 |
|
|
DC.W 0,START ;RESET: initial PC
|
| 4 |
|
|
DC.W 0,BUS_ERROR
|
| 5 |
|
|
DC.W 0,ADRS_ERROR
|
| 6 |
|
|
DC.W 0,ILLEGAL_INST
|
| 7 |
|
|
DC.W 0,DIV_ZERO
|
| 8 |
|
|
DC.W 0,START ;CHK not implemented
|
| 9 |
|
|
DC.W 0,TRAP_V
|
| 10 |
|
|
;
|
| 11 |
|
|
ORG $7C ;skip reserved vectors
|
| 12 |
|
|
DC.W 0,LEVEL_7
|
| 13 |
|
|
DC.W 0,TO_CHAR_IN ;TRAP vector 0
|
| 14 |
|
|
DC.W 0,TO_CHAR_OUT ;TRAP vector 1
|
| 15 |
|
|
DC.W 0,TO_CRLF ;TRAP vector 2
|
| 16 |
|
|
DC.W 0,TO_PRINT_MSG ;TRAP vector 3
|
| 17 |
|
|
DC.W 0,TO_PRINT_BYTE ;TRAP vector 4
|
| 18 |
|
|
DC.W 0,TO_PRINT_WORD ;TRAP vector 5
|
| 19 |
|
|
DC.W 0,TO_PRINT_LONG ;TRAP vector 6
|
| 20 |
|
|
DC.W 0,TO_GET_BYTE ;TRAP vector 7
|
| 21 |
|
|
DC.W 0,TO_GET_ADDR ;TRAP vector 8
|
| 22 |
|
|
DC.W 0,GETCMD ;TRAP vector 9
|
| 23 |
|
|
;
|
| 24 |
|
|
ORG $400 ;start of monitor
|
| 25 |
|
|
STACK EQU $9000
|
| 26 |
|
|
START MOVEA.L #STACK,A7 ;init stack
|
| 27 |
|
|
BSR INIT_ACIA ;init serial chip
|
| 28 |
|
|
BSR SIGN_ON ;greet user
|
| 29 |
|
|
GETCMD MOVEA.L #STACK,A7 ;init stack
|
| 30 |
|
|
BSR CRLF
|
| 31 |
|
|
MOVE.B #'*',D1 ;output command prompt
|
| 32 |
|
|
BSR CHAR_OUT
|
| 33 |
|
|
CLR.L D2 ;init command-text buffer
|
| 34 |
|
|
MOVEA.L #$8F00,A6 ;load buffer location
|
| 35 |
|
|
BSR GETLINE ;fill buffer with text
|
| 36 |
|
|
MOVEA.L #$8F00,A6 ;reset buffer pointer
|
| 37 |
|
|
BSR SKIP_BLK ;skip leading blanks
|
| 38 |
|
|
INCOM MOVE.B (A6)+,D1
|
| 39 |
|
|
BSR UPPER_CASE
|
| 40 |
|
|
CMPI.B #$0D,D1
|
| 41 |
|
|
BEQ SEARCH
|
| 42 |
|
|
CMPI.B #$20,D1 ;test for SP
|
| 43 |
|
|
BEQ SEARCH
|
| 44 |
|
|
ROL.L #8,D2 ;prepare D2 for new letter
|
| 45 |
|
|
MOVE.B D1,D2 ;insert it into D2
|
| 46 |
|
|
BRA INCOM ;get next letter
|
| 47 |
|
|
SEARCH MOVE.L #5,D5 ;number of commands to check
|
| 48 |
|
|
MOVEA.L #COMMANDS,A2 ;init command text pointer
|
| 49 |
|
|
MOVEA.L #COM_ADRS,A1 ;init command address pointer
|
| 50 |
|
|
TEST_NEXT CMP.L (A2),D2 ;compare command text
|
| 51 |
|
|
BEQ DO_JUMP ;branch if match
|
| 52 |
|
|
ADDQ.L #4,A2 ;point to abbreviated command
|
| 53 |
|
|
CMP.L (A2),D2 ;test again
|
| 54 |
|
|
BEQ DO_JUMP
|
| 55 |
|
|
ADDQ.L #4,A2 ;point to next command
|
| 56 |
|
|
ADDQ.L #4,A1 ;point to next address
|
| 57 |
|
|
SUBQ.L #1,D5 ;all commands checked yet?
|
| 58 |
|
|
BNE TEST_NEXT
|
| 59 |
|
|
BRA ERROR ;illegal command entered
|
| 60 |
|
|
DO_JUMP MOVEA.L (A1),A1 ;get command address
|
| 61 |
|
|
JMP (A1) ;and go execute command
|
| 62 |
|
|
COMMANDS DC.B 'DUMP' ;full command name
|
| 63 |
|
|
DC.B 0,0,0 ;abbreviated name
|
| 64 |
|
|
DC.B 'D'
|
| 65 |
|
|
DC.B 'GO '
|
| 66 |
|
|
DC.B 0,0,0
|
| 67 |
|
|
DC.B 'G'
|
| 68 |
|
|
DC.B 'EDIT'
|
| 69 |
|
|
DC.B 0,0,0
|
| 70 |
|
|
DC.B 'E'
|
| 71 |
|
|
DC.B 'MOVE'
|
| 72 |
|
|
DC.B 0,0,0
|
| 73 |
|
|
DC.B 'M'
|
| 74 |
|
|
DC.B 'HELP'
|
| 75 |
|
|
DC.B 0,0,0
|
| 76 |
|
|
DC.B 'H'
|
| 77 |
|
|
COM_ADRS DC.W 0,DUMP ;DUMP execution address
|
| 78 |
|
|
DC.W 0,GO
|
| 79 |
|
|
DC.W 0,EDIT
|
| 80 |
|
|
DC.W 0,MOOV
|
| 81 |
|
|
DC.W 0,HELP
|
| 82 |
|
|
;
|
| 83 |
|
|
DUMP BSR GET_ADDR ;get the starting address
|
| 84 |
|
|
ANDI.B #$F0,D2 ;make lower nibble zero
|
| 85 |
|
|
MOVEA.L D2,A4 ;A4 is memory read register
|
| 86 |
|
|
BSR GET_ADDR ;get the ending address
|
| 87 |
|
|
MOVEA.L D2,A5
|
| 88 |
|
|
ADR_OUT BSR CRLF ;new line please
|
| 89 |
|
|
MOVE.L A4,D2 ;print address
|
| 90 |
|
|
BSR PRINT_LONG
|
| 91 |
|
|
BSR BLANK ;and some blanks
|
| 92 |
|
|
BSR BLANK
|
| 93 |
|
|
BYTE_OUT MOVE.B (A4)+,D2 ;get a byte and increment A4
|
| 94 |
|
|
BSR PRINT_BYTE ;print the byte
|
| 95 |
|
|
BSR BLANK
|
| 96 |
|
|
MOVE.L A4,D1 ;done 16 yet?
|
| 97 |
|
|
ANDI.L #$0F,D1
|
| 98 |
|
|
BNE BYTE_OUT
|
| 99 |
|
|
SUBA.L #16,A4 ;back up 16 bytes
|
| 100 |
|
|
BSR BLANK
|
| 101 |
|
|
ASCII_OUT MOVE.B (A4)+,D1 ;get a byte
|
| 102 |
|
|
ANDI.B #$7F,D1
|
| 103 |
|
|
CMPI.B #$20,D1 ;is it printable?
|
| 104 |
|
|
BMI UN_PRINT
|
| 105 |
|
|
CMPI.B #$7D,D1
|
| 106 |
|
|
BMI SEND_IT
|
| 107 |
|
|
UN_PRINT MOVE.B #$2E,D1 ;use period for unprintables
|
| 108 |
|
|
SEND_IT BSR CHAR_OUT ;print the ASCII equivalent
|
| 109 |
|
|
MOVE.L A4,D2 ;done 16 yet?
|
| 110 |
|
|
ANDI.L #$0F,D2
|
| 111 |
|
|
BNE ASCII_OUT
|
| 112 |
|
|
BSR FREEZE ;hold display?
|
| 113 |
|
|
CMPA.L A4,A5 ;done with dump?
|
| 114 |
|
|
BMI GETCMD
|
| 115 |
|
|
BRA ADR_OUT
|
| 116 |
|
|
;
|
| 117 |
|
|
GO BSR GET_ADDR ;get execution address
|
| 118 |
|
|
MOVEA.L D2,A1
|
| 119 |
|
|
JMP (A1)
|
| 120 |
|
|
;
|
| 121 |
|
|
MOOV BSR GET_ADDR ;get starting address
|
| 122 |
|
|
MOVEA.L D2,A1
|
| 123 |
|
|
BSR GET_ADDR ;get ending address
|
| 124 |
|
|
MOVEA.L D2,A2
|
| 125 |
|
|
ADDA.L #1,A2 ;include last location
|
| 126 |
|
|
BSR GET_ADDR ;get destination address
|
| 127 |
|
|
MOVEA.L D2,A3
|
| 128 |
|
|
MOOVEM MOVE.B (A1)+,(A3)+ ;move and increment pointers
|
| 129 |
|
|
CMPA.L A1,A2 ;at ending address yet?
|
| 130 |
|
|
BNE MOOVEM
|
| 131 |
|
|
BRA GETCMD
|
| 132 |
|
|
;
|
| 133 |
|
|
EDIT BSR GET_ADDR ;get starting address
|
| 134 |
|
|
MOVEA.L D2,A2 ;A2 is the memory pointer
|
| 135 |
|
|
NEW_DATA BSR CRLF ;new line please
|
| 136 |
|
|
MOVE.L A2,D2 ;print data address
|
| 137 |
|
|
BSR PRINT_LONG
|
| 138 |
|
|
BSR BLANK
|
| 139 |
|
|
MOVE.B (A2),D2 ;get the data
|
| 140 |
|
|
BSR PRINT_BYTE ;and show it
|
| 141 |
|
|
MOVE.B #'?',D1 ;output change prompt
|
| 142 |
|
|
BSR CHAR_OUT
|
| 143 |
|
|
BSR GET_BYTE_T ;get new data
|
| 144 |
|
|
CMPI.B #'*',D2 ;no change requested?
|
| 145 |
|
|
BNE ENTER_IT ;jump if new data entered
|
| 146 |
|
|
MOVE.B (A2),D1 ;get old data back
|
| 147 |
|
|
ENTER_IT MOVE.B D1,(A2)+ ;save data and increment pointer
|
| 148 |
|
|
BSR NEW_DATA
|
| 149 |
|
|
;
|
| 150 |
|
|
INIT_ACIA MOVEA.L #$10000,A0 ;point to ACIA Control reg.
|
| 151 |
|
|
MOVE.B #3,(A0) ;ACIA master reset
|
| 152 |
|
|
MOVE.B #$15,(A0) ;select options
|
| 153 |
|
|
RTS
|
| 154 |
|
|
;
|
| 155 |
|
|
INSTAT MOVEA.L #$10000,A0 ;point to ACIA Status reg.
|
| 156 |
|
|
MOVE.B (A0),D0 ;get ACIA status
|
| 157 |
|
|
ANDI.B #1,D0 ;test RRDY bit
|
| 158 |
|
|
RTS
|
| 159 |
|
|
;
|
| 160 |
|
|
CHAR_IN BSR INSTAT ;check receiver status
|
| 161 |
|
|
BEQ CHAR_IN ;loop if no character waiting
|
| 162 |
|
|
MOVEA.L #$10002,A0 ;point to ACIA Data reg.
|
| 163 |
|
|
MOVE.B (A0),D1 ;get the ASCII character
|
| 164 |
|
|
ANDI.B #$7F,D1 ;strip off MSB
|
| 165 |
|
|
RTS
|
| 166 |
|
|
;
|
| 167 |
|
|
CHAR_OUT MOVEA.L #$10000,A0 ;point to ACIA Status reg.
|
| 168 |
|
|
CHAR_OUT2 MOVE.B (A0),D0 ;read the ACIA status
|
| 169 |
|
|
ANDI.B #2,D0 ;check the TRDY bit
|
| 170 |
|
|
BEQ CHAR_OUT2 ;loop if not ready
|
| 171 |
|
|
MOVEA.L #$10002,A0 ;point to ACIA Data reg.
|
| 172 |
|
|
MOVE.B D1,(A0) ;send the character
|
| 173 |
|
|
RTS
|
| 174 |
|
|
;
|
| 175 |
|
|
CRLF MOVE.B #$0D,D1 ;send ASCII CR
|
| 176 |
|
|
BSR CHAR_OUT
|
| 177 |
|
|
MOVE.B #$0A,D1 ;send ASCII LF
|
| 178 |
|
|
BSR CHAR_OUT
|
| 179 |
|
|
RTS
|
| 180 |
|
|
;
|
| 181 |
|
|
BLANK MOVE.B #$20,D1 ;send ASCII SP
|
| 182 |
|
|
BSR CHAR_OUT
|
| 183 |
|
|
RTS
|
| 184 |
|
|
;
|
| 185 |
|
|
PRINT_MSG MOVE.B (A3),D1 ;get a character
|
| 186 |
|
|
CMP.B #0,D1 ;end of message?
|
| 187 |
|
|
BEQ PRINT_MSG2
|
| 188 |
|
|
BSR CHAR_OUT ;send character to display
|
| 189 |
|
|
ADDQ.L #1,A3 ;point to next character
|
| 190 |
|
|
BRA PRINT_MSG
|
| 191 |
|
|
PRINT_MSG2 RTS
|
| 192 |
|
|
;
|
| 193 |
|
|
SIGN_ON MOVEA.L #HELLO,A3 ;get starting message address
|
| 194 |
|
|
BSR PRINT_MSG ;send the message
|
| 195 |
|
|
RTS
|
| 196 |
|
|
;
|
| 197 |
|
|
PRINT_BYTE MOVE.L D2,D1 ;init conversion register
|
| 198 |
|
|
ROL.B #4,D1 ;look at upper nibble first
|
| 199 |
|
|
BSR TO_ASCII ;print ASCII equivalent
|
| 200 |
|
|
MOVE.L D2,D1 ;repeat for lower nibble
|
| 201 |
|
|
TO_ASCII ANDI.B #$0F,D1 ;strip off upper nibble
|
| 202 |
|
|
ADDI.B #$30,D1 ;add ASCII bias
|
| 203 |
|
|
CMPI.B #$3A,D1 ;test for alpha conversion
|
| 204 |
|
|
BMI NO_ADD
|
| 205 |
|
|
ADDI.B #7,D1 ;correct to 41H-47H (A-F)
|
| 206 |
|
|
NO_ADD BSR CHAR_OUT ;send character
|
| 207 |
|
|
RTS
|
| 208 |
|
|
;
|
| 209 |
|
|
PRINT_WORD ROL.W #8,D2 ;get upper 8 bits
|
| 210 |
|
|
BSR PRINT_BYTE ;output first two characters
|
| 211 |
|
|
ROL.W #8,D2 ;now do the lower 8 bits
|
| 212 |
|
|
BSR PRINT_BYTE
|
| 213 |
|
|
RTS
|
| 214 |
|
|
;
|
| 215 |
|
|
PRINT_LONG SWAP D2 ;get upper 16 bits
|
| 216 |
|
|
BSR PRINT_WORD ;do 4 character conversion
|
| 217 |
|
|
SWAP D2 ;and repeat for lower word
|
| 218 |
|
|
BSR PRINT_WORD
|
| 219 |
|
|
RTS
|
| 220 |
|
|
;
|
| 221 |
|
|
VALDIG CMPI.B #'G',D1 ;greater than F?
|
| 222 |
|
|
BPL ERROR
|
| 223 |
|
|
CMPI.B #'0',D1 ;less than 0?
|
| 224 |
|
|
BMI ERROR
|
| 225 |
|
|
CMPI.B #'9'+1,D1 ;is it now A-F?
|
| 226 |
|
|
BPL NEXT_TST
|
| 227 |
|
|
RTS ;range is 0-9
|
| 228 |
|
|
NEXT_TST CMPI.B #'A',D1 ;less than A?
|
| 229 |
|
|
BMI ERROR
|
| 230 |
|
|
RTS ;range is A-F
|
| 231 |
|
|
;
|
| 232 |
|
|
ERROR MOVEA.L #WHAT,A3 ;get message pointer
|
| 233 |
|
|
BSR PRINT_MSG
|
| 234 |
|
|
BRA GETCMD ;restart monitor program
|
| 235 |
|
|
WHAT DC.B $0D,$0A ;newline
|
| 236 |
|
|
DC.B 'What?'
|
| 237 |
|
|
DC.B $0D,$0A,0 ;newline and end characters
|
| 238 |
|
|
;
|
| 239 |
|
|
TO_HEX SUBI.B #$30,D1 ;remove ASCII bias
|
| 240 |
|
|
CMPI.B #$0A,D1 ;0-9?
|
| 241 |
|
|
BMI FIN_CONV
|
| 242 |
|
|
SUBI.B #7,D1 ;remove alpha bias
|
| 243 |
|
|
FIN_CONV RTS
|
| 244 |
|
|
;
|
| 245 |
|
|
GET_BYTE_T MOVEA.L #$8F00,A6 ;TRAP entry point
|
| 246 |
|
|
BSR GETLINE
|
| 247 |
|
|
MOVEA.L #$8F00,A6
|
| 248 |
|
|
GET_BYTE BSR SKIP_BLK ;MON entry point
|
| 249 |
|
|
MOVE.B (A6)+,D1 ;get first digit
|
| 250 |
|
|
BSR UPPER_CASE
|
| 251 |
|
|
CMPI.B #$0D,D1 ;test for CR
|
| 252 |
|
|
BEQ NO_CHAN
|
| 253 |
|
|
CMPI.B #$20,D1 ;test for SP
|
| 254 |
|
|
BEQ NO_CHAN
|
| 255 |
|
|
BSR VALDIG ;check for valid digit
|
| 256 |
|
|
BSR TO_HEX ;convert into hex
|
| 257 |
|
|
ROL.B #4,D1 ;move first digit
|
| 258 |
|
|
MOVE.B D1,D2 ;save first digit
|
| 259 |
|
|
MOVE.B (A6)+,D1 ;get second digit
|
| 260 |
|
|
BSR UPPER_CASE
|
| 261 |
|
|
BSR VALDIG ;check for valid digit
|
| 262 |
|
|
BSR TO_HEX ;convert into hex
|
| 263 |
|
|
ADD.B D2,D1 ;form final result
|
| 264 |
|
|
MOVE.B #'0',D2 ;change entered
|
| 265 |
|
|
RTS
|
| 266 |
|
|
NO_CHAN MOVE.B #'*',D2 ;no change character
|
| 267 |
|
|
RTS
|
| 268 |
|
|
;
|
| 269 |
|
|
GET_ADDR_T MOVEA.L #$8F00,A6
|
| 270 |
|
|
BSR GETLINE
|
| 271 |
|
|
MOVEA.L #$8F00,A6
|
| 272 |
|
|
GET_ADDR BSR SKIP_BLK
|
| 273 |
|
|
CLR.L D1 ;init temp register
|
| 274 |
|
|
CLR.L D2 ;init result register
|
| 275 |
|
|
NEXT_CHAR MOVE.B (A6)+,D1 ;get a character
|
| 276 |
|
|
BSR UPPER_CASE
|
| 277 |
|
|
CMPI.B #$0D,D1 ;exit if CR
|
| 278 |
|
|
BEQ EXIT_ADR
|
| 279 |
|
|
CMPI.B #$20,D1 ;exit if SP
|
| 280 |
|
|
BEQ EXIT_ADR
|
| 281 |
|
|
BSR VALDIG ;test for valid digit
|
| 282 |
|
|
BSR TO_HEX ;convert digit into hex
|
| 283 |
|
|
ROL.L #4,D2 ;prepare D2 for new digit
|
| 284 |
|
|
ANDI.B #$F0,D2
|
| 285 |
|
|
ADD.B D1,D2 ;insert new digit
|
| 286 |
|
|
BRA NEXT_CHAR ;and continue
|
| 287 |
|
|
EXIT_ADR RTS
|
| 288 |
|
|
;
|
| 289 |
|
|
PANIC BSR INSTAT ;check for key
|
| 290 |
|
|
BEQ EXIT_BRK ;return if none hit
|
| 291 |
|
|
TEST_KEY BSR CHAR_IN ;get key
|
| 292 |
|
|
TEST_KEY2 CMPI.B #3,D1 ;Control-C?
|
| 293 |
|
|
BEQ GETCMD ;if yes, restart monitor
|
| 294 |
|
|
EXIT_BRK RTS
|
| 295 |
|
|
;
|
| 296 |
|
|
FREEZE BSR INSTAT ;check for key
|
| 297 |
|
|
BEQ EXIT_FREZ ;return if none hit
|
| 298 |
|
|
BSR CHAR_IN ;get key
|
| 299 |
|
|
CMPI.B #$13,D1 ;Control-S?
|
| 300 |
|
|
BEQ HOLD_IT
|
| 301 |
|
|
BRA TEST_KEY2 ;Control-C?
|
| 302 |
|
|
EXIT_FREZ RTS
|
| 303 |
|
|
HOLD_IT BSR INSTAT ;wait for another key
|
| 304 |
|
|
BEQ HOLD_IT
|
| 305 |
|
|
BRA TEST_KEY ;let PANIC check for Control-C
|
| 306 |
|
|
;
|
| 307 |
|
|
UPPER_CASE CMPI.B #'a',D1 ;check for lower case
|
| 308 |
|
|
BMI NO_CHG
|
| 309 |
|
|
CMPI.B #'z'+1,D1 ;first code after 'z'
|
| 310 |
|
|
BPL NO_CHG
|
| 311 |
|
|
ANDI.B #$DF,D1 ;switch to upper case
|
| 312 |
|
|
NO_CHG RTS
|
| 313 |
|
|
;
|
| 314 |
|
|
GETLINE MOVEA.L A6,A5 ;copy pointer
|
| 315 |
|
|
GETLINE2 MOVEA.L A5,A6 ;reset pointer and
|
| 316 |
|
|
CLR.B D6 ;counter for scraped lines
|
| 317 |
|
|
GET_CHARS BSR CHAR_IN ;get character
|
| 318 |
|
|
CMPI.B #$0D,D1 ;CR ends get line
|
| 319 |
|
|
BEQ EXIT
|
| 320 |
|
|
CMPI.B #$08,D1 ;back space key and the
|
| 321 |
|
|
BEQ BKSPS ;delete key are
|
| 322 |
|
|
CHECK_DELETE CMPI.B #$7F,D1 ;back space keys
|
| 323 |
|
|
BEQ BKSPS
|
| 324 |
|
|
CMPI.B #$15,D1 ;check for ^U and scrap the
|
| 325 |
|
|
BEQ LINE_REDO ;line if encountered
|
| 326 |
|
|
MOVE.B D1,(A6)+ ;otherwise place character
|
| 327 |
|
|
ADDQ.B #1,D6 ;in buffer, update counter and
|
| 328 |
|
|
BSR CHAR_OUT ;echo it to the screen
|
| 329 |
|
|
BRA GET_CHARS ;get another character
|
| 330 |
|
|
EXIT MOVE.B D1,(A6) ;on exit place $0D in buffer and
|
| 331 |
|
|
ADDQ.B #1,D6 ;count it
|
| 332 |
|
|
BSR CRLF
|
| 333 |
|
|
RTS
|
| 334 |
|
|
LINE_REDO BSR CRLF ;clean up the screen
|
| 335 |
|
|
BRA GETLINE2 ;start over
|
| 336 |
|
|
BKSPS CMPI.B #0,D6
|
| 337 |
|
|
BEQ GET_CHARS
|
| 338 |
|
|
SUBQ.B #1,D6
|
| 339 |
|
|
SUBA.L #1,A6
|
| 340 |
|
|
MOVE.B #8,D1
|
| 341 |
|
|
BSR CHAR_OUT
|
| 342 |
|
|
MOVE.B #' ',D1
|
| 343 |
|
|
BSR CHAR_OUT
|
| 344 |
|
|
MOVE.B #8,D1
|
| 345 |
|
|
BSR CHAR_OUT
|
| 346 |
|
|
BRA GET_CHARS
|
| 347 |
|
|
;
|
| 348 |
|
|
SKIP_BLK CMPI.B #' ',(A6)
|
| 349 |
|
|
BNE EXIT_SKIP
|
| 350 |
|
|
ADDA.L #1,A6
|
| 351 |
|
|
BRA SKIP_BLK
|
| 352 |
|
|
EXIT_SKIP RTS
|
| 353 |
|
|
;
|
| 354 |
|
|
BUS_ERROR MOVEA.L #MSG_1,A3
|
| 355 |
|
|
BRA REPORT
|
| 356 |
|
|
ADRS_ERROR MOVEA.L #MSG_2,A3
|
| 357 |
|
|
BRA REPORT
|
| 358 |
|
|
ILLEGAL_INST MOVEA.L #MSG_3,A3
|
| 359 |
|
|
BRA REPORT
|
| 360 |
|
|
DIV_ZERO MOVEA.L #MSG_4,A3
|
| 361 |
|
|
BRA REPORT
|
| 362 |
|
|
TRAP_V MOVEA.L #MSG_5,A3
|
| 363 |
|
|
BRA REPORT
|
| 364 |
|
|
LEVEL_7 MOVEA.L #MSG_6,A3
|
| 365 |
|
|
BRA REPORT
|
| 366 |
|
|
TO_CHAR_IN BSR CHAR_IN
|
| 367 |
|
|
RTE
|
| 368 |
|
|
TO_CHAR_OUT BSR CHAR_OUT
|
| 369 |
|
|
RTE
|
| 370 |
|
|
TO_CRLF BSR CRLF
|
| 371 |
|
|
RTE
|
| 372 |
|
|
TO_PRINT_MSG BSR PRINT_MSG
|
| 373 |
|
|
RTE
|
| 374 |
|
|
TO_PRINT_BYTE BSR PRINT_BYTE
|
| 375 |
|
|
RTE
|
| 376 |
|
|
TO_PRINT_WORD BSR PRINT_WORD
|
| 377 |
|
|
RTE
|
| 378 |
|
|
TO_PRINT_LONG BSR PRINT_LONG
|
| 379 |
|
|
RTE
|
| 380 |
|
|
TO_GET_BYTE BSR GET_BYTE_T
|
| 381 |
|
|
RTE
|
| 382 |
|
|
TO_GET_ADDR BSR GET_ADDR_T
|
| 383 |
|
|
RTE
|
| 384 |
|
|
HELP MOVEA.L #H_MSG1,A3
|
| 385 |
|
|
REPORT BSR CRLF ;new line thank you
|
| 386 |
|
|
BSR PRINT_MSG ;print message pointed to by A3
|
| 387 |
|
|
BSR CRLF
|
| 388 |
|
|
BRA GETCMD
|
| 389 |
|
|
|
| 390 |
|
|
MSG_1 DC.B 'Bus Error',0
|
| 391 |
|
|
MSG_2 DC.B 'Address Error',0
|
| 392 |
|
|
MSG_3 DC.B 'Illegal Instruction Error',0
|
| 393 |
|
|
MSG_4 DC.B 'Divide by Zero Error',0
|
| 394 |
|
|
MSG_5 DC.B 'TRAPV Overflow',0
|
| 395 |
|
|
MSG_6 DC.B 'Level-7 Interrupt',0
|
| 396 |
|
|
|
| 397 |
|
|
HELLO DC.B $0D,$0A ;newline
|
| 398 |
|
|
DC.B '68000 Monitor, Version 7.5, C1995 JLACD'
|
| 399 |
|
|
DC.B $0D,$0A,0 ;newline and end characters
|
| 400 |
|
|
|
| 401 |
|
|
H_MSG1 DC.B $0D,$0A,$0D,$0A
|
| 402 |
|
|
DC.B '*** 68000 Cpu-based Single Board Computer ***'
|
| 403 |
|
|
DC.B $0D,$0A
|
| 404 |
|
|
DC.B 'Command Syntax Action'
|
| 405 |
|
|
DC.B $0D,$0A,$0D,$0A
|
| 406 |
|
|
DC.B 'DUMP 400 44F Display memory contents'
|
| 407 |
|
|
DC.B $0D,$0A
|
| 408 |
|
|
DC.B ' Ctrl-S freezes display'
|
| 409 |
|
|
DC.B $0D,$0A
|
| 410 |
|
|
DC.B ' Any key restarts display'
|
| 411 |
|
|
DC.B $0D,$0A
|
| 412 |
|
|
DC.B ' Ctrl-C cancels dump'
|
| 413 |
|
|
DC.B $0D,$0A,$0D,$0A
|
| 414 |
|
|
DC.B 'EDIT 8000 Load RAM starting at 8000'
|
| 415 |
|
|
DC.B $0D,$0A
|
| 416 |
|
|
DC.B ' Use CR or blank to keep data'
|
| 417 |
|
|
DC.B $0D,$0A
|
| 418 |
|
|
DC.B ' Ctrl-C cancels patching'
|
| 419 |
|
|
DC.B $0D,$0A,$0D,$0A
|
| 420 |
|
|
DC.B 'GO 8000 Execute program at 8000'
|
| 421 |
|
|
DC.B $0D,$0A,$0D,$0A
|
| 422 |
|
|
DC.B 'MOVE 8000 80FF 8100 Move memory contents'
|
| 423 |
|
|
DC.B $0D,$0A,$0D,$0A
|
| 424 |
|
|
DC.B 'All commands may be shortened to single letters.'
|
| 425 |
|
|
DC.B $0D,$0A
|
| 426 |
|
|
DC.B 'Use D, E, G, M, or H. Lower case characters'
|
| 427 |
|
|
DC.B $0D,$0A
|
| 428 |
|
|
DC.B 'as well.'
|
| 429 |
|
|
DC.B $0D,$0A,$0D,$0A
|
| 430 |
|
|
DC.B 'This 68000 system was designed and programmed by'
|
| 431 |
|
|
DC.B $0D,$0A
|
| 432 |
|
|
DC.B 'James Antonakos, Alan Dixon and Donovan McCarty.'
|
| 433 |
|
|
DC.B $0D,$0A,0
|
| 434 |
|
|
END START
|
| 435 |
|
|
|
