]>
Commit | Line | Data |
---|---|---|
1 | ; Z80 Interpreter. | |
2 | ; This is part of the Z80-CP/M emulator written by Sprite_tm. | |
3 | ; The Z80-specific instructions themselves actually aren't | |
4 | ; implemented yet, making this more of an i8080 emulator. | |
5 | ||
6 | ; Copyright (C) 2010 Sprite_tm | |
7 | ; Copyright (C) 2010 Leo C. | |
8 | ||
9 | ; This file is part of avrcpm. | |
10 | ; | |
11 | ; avrcpm is free software: you can redistribute it and/or modify it | |
12 | ; under the terms of the GNU General Public License as published by | |
13 | ; the Free Software Foundation, either version 3 of the License, or | |
14 | ; (at your option) any later version. | |
15 | ; | |
16 | ; avrcpm is distributed in the hope that it will be useful, | |
17 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ; GNU General Public License for more details. | |
20 | ; | |
21 | ; You should have received a copy of the GNU General Public License | |
22 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
23 | ; | |
24 | ; $Id$ | |
25 | ; | |
26 | ||
27 | .dseg | |
28 | ||
29 | z_b: .byte 1 | |
30 | z_c: .byte 1 | |
31 | z_d: .byte 1 | |
32 | z_e: .byte 1 | |
33 | z_h: .byte 1 | |
34 | z_l: .byte 1 | |
35 | ||
36 | .cseg | |
37 | ||
38 | ;Init z80 | |
39 | z80_init: | |
40 | ldi z_pcl,low (IPLADDR) | |
41 | ldi z_pch,high(IPLADDR) | |
42 | ||
43 | cbi flags,trace | |
44 | printnewline | |
45 | printstring "Ok, CPU is live!" | |
46 | printnewline | |
47 | ||
48 | main: | |
49 | .if INS_DEBUG | |
50 | cbi flags,trace | |
51 | cpi z_pch,DBG_TRACE_BOTTOM | |
52 | brlo notraceon | |
53 | cpi z_pch,DBG_TRACE_TOP | |
54 | brsh notraceon | |
55 | sbi flags,trace | |
56 | notraceon: | |
57 | .endif | |
58 | ||
59 | ||
60 | .if PRINT_PC | |
61 | cpi z_pch,DBG_TRACE_BOTTOM | |
62 | brlo noprintpc | |
63 | cpi z_pch,DBG_TRACE_TOP | |
64 | brsh noprintpc | |
65 | ||
66 | printnewline | |
67 | printstring "PC=" | |
68 | movw temp,z_pcl | |
69 | rcall printhexw | |
70 | printstring " " | |
71 | noprintpc: | |
72 | .endif | |
73 | ||
74 | ; *** Stage 1: Fetch next opcode | |
75 | mem_read_s z_pc | |
76 | ||
77 | ||
78 | .if INS_DEBUG | |
79 | sbis flags,trace | |
80 | rjmp notrace1 | |
81 | printnewline | |
82 | printstring "PC=" | |
83 | push temp | |
84 | movw temp,z_pcl | |
85 | rcall printhexw | |
86 | pop temp | |
87 | printstring ", opcode=" | |
88 | rcall printhex | |
89 | notrace1: | |
90 | .endif | |
91 | adiw z_pcl,1 | |
92 | ||
93 | ; *** Stage 2: Decode it using the ins_table. | |
94 | ldi zh,high(inst_table*2) | |
95 | mov zl,temp | |
96 | add zl,temp | |
97 | adc zh,_0 | |
98 | lpm insdecl,Z+ | |
99 | lpm insdech,Z | |
100 | ||
101 | .if INS_DEBUG | |
102 | sbis flags,trace | |
103 | rjmp notrace2 | |
104 | printstring ", decoded=" | |
105 | movw temp,insdecl | |
106 | rcall printhexw | |
107 | notrace2: | |
108 | .endif | |
109 | ||
110 | ; *** Stage 3: Fetch operand. Use the fetch jumptable for this. | |
111 | mov temp,insdecl | |
112 | andi temp,0x1F | |
113 | breq nofetch | |
114 | ldi zl,low(fetchjumps) | |
115 | ldi zh,high(fetchjumps) | |
116 | add zl,temp | |
117 | adc zh,_0 | |
118 | icall | |
119 | ||
120 | .if INS_DEBUG | |
121 | sbis flags,trace | |
122 | rjmp notrace3 | |
123 | printstring " pre: op=" | |
124 | movw temp,opl | |
125 | rcall printhexw | |
126 | notrace3: | |
127 | rjmp nonofetch | |
128 | .endif | |
129 | ||
130 | nofetch: | |
131 | .if INS_DEBUG | |
132 | sbis flags,trace | |
133 | rjmp nonofetch | |
134 | printstring " " | |
135 | ||
136 | nonofetch: | |
137 | .endif | |
138 | ; *** Stage 4: Execute operation :) Use the op jumptable for this. | |
139 | mov temp,insdech | |
140 | andi temp,0xFC | |
141 | breq nooper | |
142 | lsr temp | |
143 | lsr temp | |
144 | ldi zl,low(opjumps) | |
145 | ldi zh,high(opjumps) | |
146 | add zl,temp | |
147 | adc zh,_0 | |
148 | icall | |
149 | ||
150 | .if INS_DEBUG | |
151 | sbis flags,trace | |
152 | rjmp notrace4 | |
153 | printstring " post: op=" | |
154 | movw temp,opl | |
155 | rcall printhexw | |
156 | notrace4: | |
157 | rjmp nonooper | |
158 | .endif | |
159 | ||
160 | nooper: | |
161 | .if INS_DEBUG | |
162 | sbis flags,trace | |
163 | rjmp nonooper | |
164 | printstring " " | |
165 | ||
166 | nonooper: | |
167 | .endif | |
168 | ; *** Stage 5: Store operand. Use the store jumptable for this. | |
169 | swap insdecl | |
170 | swap insdech | |
171 | movw temp,insdecl | |
172 | andi temp,0x0E | |
173 | andi temp2,0x30 | |
174 | or temp,temp2 | |
175 | breq nostore | |
176 | lsr temp | |
177 | ldi zl,low(storejumps) | |
178 | ldi zh,high(storejumps) | |
179 | add zl,temp | |
180 | adc zh,_0 | |
181 | icall | |
182 | ||
183 | .if INS_DEBUG | |
184 | sbis flags,trace | |
185 | rjmp notrace5 | |
186 | printstring " stored " | |
187 | notrace5: | |
188 | .endif | |
189 | ||
190 | nostore: | |
191 | ;All done. Neeeext! | |
192 | rjmp main | |
193 | ||
194 | ; -------------------------------------------------------------- | |
195 | ||
196 | ; ------------ Fetch phase stuff ----------------- | |
197 | ||
198 | .equ FETCH_NOP = (0<<0) | |
199 | .equ FETCH_A = (1<<0) | |
200 | .equ FETCH_B = (2<<0) | |
201 | .equ FETCH_C = (3<<0) | |
202 | .equ FETCH_D = (4<<0) | |
203 | .equ FETCH_E = (5<<0) | |
204 | .equ FETCH_H = (6<<0) | |
205 | .equ FETCH_L = (7<<0) | |
206 | .equ FETCH_AF = (8<<0) | |
207 | .equ FETCH_BC = (9<<0) | |
208 | .equ FETCH_DE = (10<<0) | |
209 | .equ FETCH_HL = (11<<0) | |
210 | .equ FETCH_SP = (12<<0) | |
211 | .equ FETCH_MBC = (13<<0) | |
212 | .equ FETCH_MDE = (14<<0) | |
213 | .equ FETCH_MHL = (15<<0) | |
214 | .equ FETCH_MSP = (16<<0) | |
215 | .equ FETCH_DIR8 = (17<<0) | |
216 | .equ FETCH_DIR16= (18<<0) | |
217 | .equ FETCH_RST = (19<<0) | |
218 | ||
219 | ||
220 | ;Jump table for fetch routines. Make sure to keep this in sync with the .equs! | |
221 | fetchjumps: | |
222 | rjmp do_fetch_nop | |
223 | rjmp do_fetch_a | |
224 | rjmp do_fetch_b | |
225 | rjmp do_fetch_c | |
226 | rjmp do_fetch_d | |
227 | rjmp do_fetch_e | |
228 | rjmp do_fetch_h | |
229 | rjmp do_fetch_l | |
230 | rjmp do_fetch_af | |
231 | rjmp do_fetch_bc | |
232 | rjmp do_fetch_de | |
233 | rjmp do_fetch_hl | |
234 | rjmp do_fetch_sp | |
235 | rjmp do_fetch_mbc | |
236 | rjmp do_fetch_mde | |
237 | rjmp do_fetch_mhl | |
238 | rjmp do_fetch_msp | |
239 | rjmp do_fetch_dir8 | |
240 | rjmp do_fetch_dir16 | |
241 | rjmp do_fetch_rst | |
242 | ||
243 | do_fetch_nop: | |
244 | ret | |
245 | ||
246 | do_fetch_a: | |
247 | mov opl,z_a | |
248 | ret | |
249 | ||
250 | do_fetch_b: | |
251 | lds opl,z_b | |
252 | ret | |
253 | ||
254 | do_fetch_c: | |
255 | lds opl,z_c | |
256 | ret | |
257 | ||
258 | do_fetch_d: | |
259 | lds opl,z_d | |
260 | ret | |
261 | ||
262 | do_fetch_e: | |
263 | lds opl,z_e | |
264 | ret | |
265 | ||
266 | do_fetch_h: | |
267 | lds opl,z_h | |
268 | ret | |
269 | ||
270 | do_fetch_l: | |
271 | lds opl,z_l | |
272 | ret | |
273 | ||
274 | do_fetch_af: | |
275 | mov opl,z_flags | |
276 | mov oph,z_a | |
277 | ret | |
278 | ||
279 | do_fetch_bc: | |
280 | lds opl,z_c | |
281 | lds oph,z_b | |
282 | ret | |
283 | ||
284 | do_fetch_de: | |
285 | lds opl,z_e | |
286 | lds oph,z_d | |
287 | ret | |
288 | ||
289 | do_fetch_hl: | |
290 | lds opl,z_l | |
291 | lds oph,z_h | |
292 | ret | |
293 | ||
294 | do_fetch_sp: | |
295 | movw opl,z_spl | |
296 | ret | |
297 | ||
298 | do_fetch_mbc: | |
299 | lds xh,z_b | |
300 | lds xl,z_c | |
301 | mem_read_d opl | |
302 | ret | |
303 | ||
304 | do_fetch_mde: | |
305 | lds xh,z_d | |
306 | lds xl,z_e | |
307 | mem_read_d opl | |
308 | ret | |
309 | ||
310 | do_fetch_mhl: | |
311 | lds xh,z_h | |
312 | lds xl,z_l | |
313 | mem_read_d opl | |
314 | ret | |
315 | ||
316 | do_fetch_msp: | |
317 | movw x,z_spl | |
318 | mem_read_d opl | |
319 | adiw x,1 | |
320 | mem_read_d oph | |
321 | ret | |
322 | ||
323 | do_fetch_dir8: | |
324 | mem_read_ds opl, z_pc | |
325 | adiw z_pcl,1 | |
326 | ret | |
327 | ||
328 | do_fetch_dir16: | |
329 | mem_read_ds opl, z_pc | |
330 | adiw z_pcl,1 | |
331 | mem_read_ds oph, z_pc | |
332 | adiw z_pcl,1 | |
333 | ret | |
334 | ||
335 | do_fetch_rst: | |
336 | movw x,z_pcl | |
337 | sbiw x,1 | |
338 | mem_read_d opl | |
339 | andi opl,0x38 | |
340 | ldi oph,0 | |
341 | ret | |
342 | ||
343 | ||
344 | ||
345 | ; ------------ Store phase stuff ----------------- | |
346 | ||
347 | .equ STORE_NOP = (0<<5) | |
348 | .equ STORE_A = (1<<5) | |
349 | .equ STORE_B = (2<<5) | |
350 | .equ STORE_C = (3<<5) | |
351 | .equ STORE_D = (4<<5) | |
352 | .equ STORE_E = (5<<5) | |
353 | .equ STORE_H = (6<<5) | |
354 | .equ STORE_L = (7<<5) | |
355 | .equ STORE_AF = (8<<5) | |
356 | .equ STORE_BC = (9<<5) | |
357 | .equ STORE_DE = (10<<5) | |
358 | .equ STORE_HL = (11<<5) | |
359 | .equ STORE_SP = (12<<5) | |
360 | .equ STORE_PC = (13<<5) | |
361 | .equ STORE_MBC = (14<<5) | |
362 | .equ STORE_MDE = (15<<5) | |
363 | .equ STORE_MHL = (16<<5) | |
364 | .equ STORE_MSP = (17<<5) | |
365 | .equ STORE_RET = (18<<5) | |
366 | .equ STORE_CALL = (19<<5) | |
367 | .equ STORE_AM = (20<<5) | |
368 | ||
369 | ;Jump table for store routines. Make sure to keep this in sync with the .equs! | |
370 | storejumps: | |
371 | rjmp do_store_nop | |
372 | rjmp do_store_a | |
373 | rjmp do_store_b | |
374 | rjmp do_store_c | |
375 | rjmp do_store_d | |
376 | rjmp do_store_e | |
377 | rjmp do_store_h | |
378 | rjmp do_store_l | |
379 | rjmp do_store_af | |
380 | rjmp do_store_bc | |
381 | rjmp do_store_de | |
382 | rjmp do_store_hl | |
383 | rjmp do_store_sp | |
384 | rjmp do_store_pc | |
385 | rjmp do_store_mbc | |
386 | rjmp do_store_mde | |
387 | rjmp do_store_mhl | |
388 | rjmp do_store_msp | |
389 | rjmp do_store_ret | |
390 | rjmp do_store_call | |
391 | rjmp do_store_am | |
392 | ||
393 | ||
394 | do_store_nop: | |
395 | ret | |
396 | ||
397 | do_store_a: | |
398 | mov z_a,opl | |
399 | ret | |
400 | ||
401 | do_store_b: | |
402 | sts z_b,opl | |
403 | ret | |
404 | ||
405 | do_store_c: | |
406 | sts z_c,opl | |
407 | ret | |
408 | ||
409 | do_store_d: | |
410 | sts z_d,opl | |
411 | ret | |
412 | ||
413 | do_store_e: | |
414 | sts z_e,opl | |
415 | ret | |
416 | ||
417 | do_store_h: | |
418 | sts z_h,opl | |
419 | ret | |
420 | ||
421 | do_store_l: | |
422 | sts z_l,opl | |
423 | ret | |
424 | ||
425 | do_store_af: | |
426 | mov z_a,oph | |
427 | mov z_flags,opl | |
428 | ret | |
429 | ||
430 | do_store_bc: | |
431 | sts z_b,oph | |
432 | sts z_c,opl | |
433 | ret | |
434 | ||
435 | do_store_de: | |
436 | sts z_d,oph | |
437 | sts z_e,opl | |
438 | ret | |
439 | ||
440 | do_store_hl: | |
441 | sts z_h,oph | |
442 | sts z_l,opl | |
443 | ret | |
444 | ||
445 | do_store_mbc: | |
446 | lds xh,z_b | |
447 | lds xl,z_c | |
448 | mem_write_s opl | |
449 | ret | |
450 | ||
451 | do_store_mde: | |
452 | lds xh,z_d | |
453 | lds xl,z_e | |
454 | mem_write_s opl | |
455 | ret | |
456 | ||
457 | do_store_mhl: | |
458 | lds xh,z_h | |
459 | lds xl,z_l | |
460 | mem_write_s opl | |
461 | ret | |
462 | ||
463 | do_store_msp: | |
464 | movw xl,z_spl | |
465 | mem_write_s opl | |
466 | adiw xl,1 | |
467 | mem_write_s oph | |
468 | ret | |
469 | ||
470 | do_store_sp: | |
471 | movw z_spl,opl | |
472 | ret | |
473 | ||
474 | do_store_pc: | |
475 | movw z_pcl,opl | |
476 | ret | |
477 | ||
478 | do_store_ret: | |
479 | movw x,z_spl | |
480 | mem_read_d z_pcl | |
481 | adiw x,1 | |
482 | mem_read_d z_pch | |
483 | adiw x,1 | |
484 | movw z_spl,x | |
485 | ||
486 | .if STACK_DBG | |
487 | printnewline | |
488 | printstring "Stack pop " | |
489 | movw temp,z_pcl | |
490 | rcall printhexw | |
491 | printstring ", SP is now " | |
492 | movw temp,z_spl | |
493 | rcall printhexw | |
494 | printstring ". " | |
495 | .endif | |
496 | ret | |
497 | ||
498 | do_store_call: | |
499 | movw xl,z_spl | |
500 | sbiw x,1 | |
501 | mem_write_s z_pch | |
502 | sbiw x,1 | |
503 | mem_write_s z_pcl | |
504 | movw z_spl,xl | |
505 | ||
506 | .if STACK_DBG | |
507 | printnewline | |
508 | printstring "Stack push " | |
509 | movw temp,z_pcl | |
510 | rcall printhexw | |
511 | printstring ", SP is now " | |
512 | movw temp,z_spl | |
513 | rcall printhexw | |
514 | printstring ". " | |
515 | .endif | |
516 | movw z_pcl,opl | |
517 | ret | |
518 | ||
519 | ||
520 | do_store_am: | |
521 | mem_write_ds op, z_a | |
522 | ret | |
523 | ||
524 | ||
525 | ; ------------ Operation phase stuff ----------------- | |
526 | ||
527 | ||
528 | .equ OP_NOP = (0<<10) | |
529 | .equ OP_INC = (1<<10) | |
530 | .equ OP_DEC = (2<<10) | |
531 | .equ OP_INC16 = (3<<10) | |
532 | .equ OP_DEC16 = (4<<10) | |
533 | .equ OP_RLC = (5<<10) | |
534 | .equ OP_RRC = (6<<10) | |
535 | .equ OP_RR = (7<<10) | |
536 | .equ OP_RL = (8<<10) | |
537 | .equ OP_ADDA = (9<<10) | |
538 | .equ OP_ADCA = (10<<10) | |
539 | .equ OP_SUBFA = (11<<10) | |
540 | .equ OP_SBCFA = (12<<10) | |
541 | .equ OP_ANDA = (13<<10) | |
542 | .equ OP_ORA = (14<<10) | |
543 | .equ OP_XORA = (15<<10) | |
544 | .equ OP_ADDHL = (16<<10) | |
545 | .equ OP_STHL = (17<<10) ;store HL in fetched address | |
546 | .equ OP_RMEM16 = (18<<10) ;read mem at fetched address | |
547 | .equ OP_RMEM8 = (19<<10) ;read mem at fetched address | |
548 | .equ OP_DA = (20<<10) | |
549 | .equ OP_SCF = (21<<10) | |
550 | .equ OP_CPL = (22<<10) | |
551 | .equ OP_CCF = (23<<10) | |
552 | .equ OP_POP16 = (24<<10) | |
553 | .equ OP_PUSH16 = (25<<10) | |
554 | .equ OP_IFNZ = (26<<10) | |
555 | .equ OP_IFZ = (27<<10) | |
556 | .equ OP_IFNC = (28<<10) | |
557 | .equ OP_IFC = (29<<10) | |
558 | .equ OP_IFPO = (30<<10) | |
559 | .equ OP_IFPE = (31<<10) | |
560 | .equ OP_IFP = (32<<10) | |
561 | .equ OP_IFM = (33<<10) | |
562 | .equ OP_OUTA = (34<<10) | |
563 | .equ OP_IN = (35<<10) | |
564 | .equ OP_EXHL = (36<<10) | |
565 | .equ OP_DI = (37<<10) | |
566 | .equ OP_EI = (38<<10) | |
567 | .equ OP_INV = (39<<10) | |
568 | .equ OP_CPFA = (40<<10) | |
569 | .equ OP_INCA = (41<<10) | |
570 | .equ OP_DECA = (42<<10) | |
571 | ||
572 | opjumps: | |
573 | rjmp do_op_nop | |
574 | rjmp do_op_inc | |
575 | rjmp do_op_dec | |
576 | rjmp do_op_inc16 | |
577 | rjmp do_op_dec16 | |
578 | rjmp do_op_rlc | |
579 | rjmp do_op_rrc | |
580 | rjmp do_op_rr | |
581 | rjmp do_op_rl | |
582 | rjmp do_op_adda | |
583 | rjmp do_op_adca | |
584 | rjmp do_op_subfa | |
585 | rjmp do_op_sbcfa | |
586 | rjmp do_op_anda | |
587 | rjmp do_op_ora | |
588 | rjmp do_op_xora | |
589 | rjmp do_op_addhl | |
590 | rjmp do_op_sthl | |
591 | rjmp do_op_rmem16 | |
592 | rjmp do_op_rmem8 | |
593 | rjmp do_op_da | |
594 | rjmp do_op_scf | |
595 | rjmp do_op_cpl | |
596 | rjmp do_op_ccf | |
597 | rjmp do_op_pop16 | |
598 | rjmp do_op_push16 | |
599 | rjmp do_op_ifnz | |
600 | rjmp do_op_ifz | |
601 | rjmp do_op_ifnc | |
602 | rjmp do_op_ifc | |
603 | rjmp do_op_ifpo | |
604 | rjmp do_op_ifpe | |
605 | rjmp do_op_ifp | |
606 | rjmp do_op_ifm | |
607 | rjmp do_op_outa | |
608 | rjmp do_op_in | |
609 | rjmp do_op_exhl | |
610 | rjmp do_op_di | |
611 | rjmp do_op_ei | |
612 | rjmp do_op_inv | |
613 | rjmp do_op_cpfa | |
614 | rjmp do_op_inca | |
615 | rjmp do_op_deca | |
616 | ||
617 | ||
618 | ;---------------------------------------------------------------- | |
619 | ;| | | |
620 | ;| Zilog | | |
621 | ;| | | |
622 | ;| ZZZZZZZ 88888 000 | | |
623 | ;| Z 8 8 0 0 | | |
624 | ;| Z 8 8 0 0 0 | | |
625 | ;| Z 88888 0 0 0 | | |
626 | ;| Z 8 8 0 0 0 | | |
627 | ;| Z 8 8 0 0 | | |
628 | ;| ZZZZZZZ 88888 000 | | |
629 | ;| | | |
630 | ;| Z80 MICROPROCESSOR Instruction Set Summary | | |
631 | ;| | | |
632 | ;---------------------------------------------------------------- | |
633 | ;---------------------------------------------------------------- | |
634 | ;|Mnemonic |SZHPNC|Description |Notes | | |
635 | ;|----------+------+---------------------+----------------------| | |
636 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
637 | ;|ADC HL,ss |**?V0*|Add with Carry |HL=HL+ss+CY | | |
638 | ;|ADD A,s |***V0*|Add |A=A+s | | |
639 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
640 | ;|ADD IX,pp |--?-0*|Add |IX=IX+pp | | |
641 | ;|ADD IY,rr |--?-0*|Add |IY=IY+rr | | |
642 | ;|AND s |**1P00|Logical AND |A=A&s | | |
643 | ;|BIT b,m |?*1?0-|Test Bit |m&{2^b} | | |
644 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
645 | ;|CALL nn |------|Unconditional Call |-[SP]=PC,PC=nn | | |
646 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
647 | ;|CP s |***V1*|Compare |A-s | | |
648 | ;|CPD |****1-|Compare and Decrement|A-[HL],HL=HL-1,BC=BC-1| | |
649 | ;|CPDR |****1-|Compare, Dec., Repeat|CPD till A=[HL]or BC=0| | |
650 | ;|CPI |****1-|Compare and Increment|A-[HL],HL=HL+1,BC=BC-1| | |
651 | ;|CPIR |****1-|Compare, Inc., Repeat|CPI till A=[HL]or BC=0| | |
652 | ;|CPL |--1-1-|Complement |A=~A | | |
653 | ;|DAA |***P-*|Decimal Adjust Acc. |A=BCD format | | |
654 | ;|DEC s |***V1-|Decrement |s=s-1 | | |
655 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
656 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
657 | ;|DI |------|Disable Interrupts | | | |
658 | ;|DJNZ e |------|Dec., Jump Non-Zero |B=B-1 till B=0 | | |
659 | ;|EI |------|Enable Interrupts | | | |
660 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
661 | ;|EX [SP],xx|------|Exchange |[SP]<->xx | | |
662 | ;|EX AF,AF' |------|Exchange |AF<->AF' | | |
663 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
664 | ;|EXX |------|Exchange |qq<->qq' (except AF)| | |
665 | ;|HALT |------|Halt | | | |
666 | ;|IM n |------|Interrupt Mode | (n=0,1,2)| | |
667 | ;|IN A,[n] |------|Input |A=[n] | | |
668 | ;|IN r,[C] |***P0-|Input |r=[C] | | |
669 | ;|INC r |***V0-|Increment |r=r+1 | | |
670 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
671 | ;|INC xx |------|Increment |xx=xx+1 | | |
672 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
673 | ;|INC ss |------|Increment |ss=ss+1 | | |
674 | ;|IND |?*??1-|Input and Decrement |[HL]=[C],HL=HL-1,B=B-1| | |
675 | ;|INDR |?1??1-|Input, Dec., Repeat |IND till B=0 | | |
676 | ;|INI |?*??1-|Input and Increment |[HL]=[C],HL=HL+1,B=B-1| | |
677 | ;|INIR |?1??1-|Input, Inc., Repeat |INI till B=0 | | |
678 | ;|JP [HL] |------|Unconditional Jump |PC=[HL] | | |
679 | ;|JP [xx] |------|Unconditional Jump |PC=[xx] | | |
680 | ;|JP nn |------|Unconditional Jump |PC=nn | | |
681 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
682 | ;|JR e |------|Unconditional Jump |PC=PC+e | | |
683 | ;|JR cc,e |------|Conditional Jump |If cc JR(cc=C,NC,NZ,Z)| | |
684 | ;|LD dst,src|------|Load |dst=src | | |
685 | ;|LD A,i |**0*0-|Load |A=i (i=I,R)| | |
686 | ;|LDD |--0*0-|Load and Decrement |[DE]=[HL],HL=HL-1,# | | |
687 | ;|LDDR |--000-|Load, Dec., Repeat |LDD till BC=0 | | |
688 | ;|LDI |--0*0-|Load and Increment |[DE]=[HL],HL=HL+1,# | | |
689 | ;|LDIR |--000-|Load, Inc., Repeat |LDI till BC=0 | | |
690 | ;|NEG |***V1*|Negate |A=-A | | |
691 | ;|NOP |------|No Operation | | | |
692 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
693 | ;|OTDR |?1??1-|Output, Dec., Repeat |OUTD till B=0 | | |
694 | ;|OTIR |?1??1-|Output, Inc., Repeat |OUTI till B=0 | | |
695 | ;|OUT [C],r |------|Output |[C]=r | | |
696 | ;|OUT [n],A |------|Output |[n]=A | | |
697 | ;|OUTD |?*??1-|Output and Decrement |[C]=[HL],HL=HL-1,B=B-1| | |
698 | ;|OUTI |?*??1-|Output and Increment |[C]=[HL],HL=HL+1,B=B-1| | |
699 | ;|POP xx |------|Pop |xx=[SP]+ | | |
700 | ;|POP qq |------|Pop |qq=[SP]+ | | |
701 | ;|PUSH xx |------|Push |-[SP]=xx | | |
702 | ;|PUSH qq |------|Push |-[SP]=qq | | |
703 | ;|RES b,m |------|Reset bit |m=m&{~2^b} | | |
704 | ;|RET |------|Return |PC=[SP]+ | | |
705 | ;|RET cc |------|Conditional Return |If cc RET | | |
706 | ;|RETI |------|Return from Interrupt|PC=[SP]+ | | |
707 | ;|RETN |------|Return from NMI |PC=[SP]+ | | |
708 | ;|RL m |**0P0*|Rotate Left |m={CY,m}<- | | |
709 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
710 | ;|RLC m |**0P0*|Rotate Left Circular |m=m<- | | |
711 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
712 | ;|RLD |**0P0-|Rotate Left 4 bits |{A,[HL]}={A,[HL]}<- ##| | |
713 | ;|RR m |**0P0*|Rotate Right |m=->{CY,m} | | |
714 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
715 | ;|RRC m |**0P0*|Rotate Right Circular|m=->m | | |
716 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
717 | ;|RRD |**0P0-|Rotate Right 4 bits |{A,[HL]}=->{A,[HL]} ##| | |
718 | ;|RST p |------|Restart | (p=0H,8H,10H,...,38H)| | |
719 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
720 | ;|SBC HL,ss |**?V1*|Subtract with Carry |HL=HL-ss-CY | | |
721 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
722 | ;|SET b,m |------|Set bit |m=mv{2^b} | | |
723 | ;|SLA m |**0P0*|Shift Left Arithmetic|m=m*2 | | |
724 | ;|SRA m |**0P0*|Shift Right Arith. |m=m/2 | | |
725 | ;|SRL m |**0P0*|Shift Right Logical |m=->{0,m,CY} | | |
726 | ;|SUB s |***V1*|Subtract |A=A-s | | |
727 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
728 | ;|----------+------+--------------------------------------------| | |
729 | ;| F |-*01? |Flag unaffected/affected/reset/set/unknown | | |
730 | ;| S |S |Sign flag (Bit 7) | | |
731 | ;| Z | Z |Zero flag (Bit 6) | | |
732 | ;| HC | H |Half Carry flag (Bit 4) | | |
733 | ;| P/V | P |Parity/Overflow flag (Bit 2, V=overflow) | | |
734 | ;| N | N |Add/Subtract flag (Bit 1) | | |
735 | ;| CY | C|Carry flag (Bit 0) | | |
736 | ;|-----------------+--------------------------------------------| | |
737 | ;| n |Immediate addressing | | |
738 | ;| nn |Immediate extended addressing | | |
739 | ;| e |Relative addressing (PC=PC+2+offset) | | |
740 | ;| [nn] |Extended addressing | | |
741 | ;| [xx+d] |Indexed addressing | | |
742 | ;| r |Register addressing | | |
743 | ;| [rr] |Register indirect addressing | | |
744 | ;| |Implied addressing | | |
745 | ;| b |Bit addressing | | |
746 | ;| p |Modified page zero addressing (see RST) | | |
747 | ;|-----------------+--------------------------------------------| | |
748 | ;|DEFB n(,...) |Define Byte(s) | | |
749 | ;|DEFB 'str'(,...) |Define Byte ASCII string(s) | | |
750 | ;|DEFS nn |Define Storage Block | | |
751 | ;|DEFW nn(,...) |Define Word(s) | | |
752 | ;|-----------------+--------------------------------------------| | |
753 | ;| A B C D E |Registers (8-bit) | | |
754 | ;| AF BC DE HL |Register pairs (16-bit) | | |
755 | ;| F |Flag register (8-bit) | | |
756 | ;| I |Interrupt page address register (8-bit) | | |
757 | ;| IX IY |Index registers (16-bit) | | |
758 | ;| PC |Program Counter register (16-bit) | | |
759 | ;| R |Memory Refresh register | | |
760 | ;| SP |Stack Pointer register (16-bit) | | |
761 | ;|-----------------+--------------------------------------------| | |
762 | ;| b |One bit (0 to 7) | | |
763 | ;| cc |Condition (C,M,NC,NZ,P,PE,PO,Z) | | |
764 | ;| d |One-byte expression (-128 to +127) | | |
765 | ;| dst |Destination s, ss, [BC], [DE], [HL], [nn] | | |
766 | ;| e |One-byte expression (-126 to +129) | | |
767 | ;| m |Any register r, [HL] or [xx+d] | | |
768 | ;| n |One-byte expression (0 to 255) | | |
769 | ;| nn |Two-byte expression (0 to 65535) | | |
770 | ;| pp |Register pair BC, DE, IX or SP | | |
771 | ;| qq |Register pair AF, BC, DE or HL | | |
772 | ;| qq' |Alternative register pair AF, BC, DE or HL | | |
773 | ;| r |Register A, B, C, D, E, H or L | | |
774 | ;| rr |Register pair BC, DE, IY or SP | | |
775 | ;| s |Any register r, value n, [HL] or [xx+d] | | |
776 | ;| src |Source s, ss, [BC], [DE], [HL], nn, [nn] | | |
777 | ;| ss |Register pair BC, DE, HL or SP | | |
778 | ;| xx |Index register IX or IY | | |
779 | ;|-----------------+--------------------------------------------| | |
780 | ;| + - * / ^ |Add/subtract/multiply/divide/exponent | | |
781 | ;| & ~ v x |Logical AND/NOT/inclusive OR/exclusive OR | | |
782 | ;| <- -> |Rotate left/right | | |
783 | ;| [ ] |Indirect addressing | | |
784 | ;| [ ]+ -[ ] |Indirect addressing auto-increment/decrement| | |
785 | ;| { } |Combination of operands | | |
786 | ;| # |Also BC=BC-1,DE=DE-1 | | |
787 | ;| ## |Only lower 4 bits of accumulator A used | | |
788 | ;---------------------------------------------------------------- | |
789 | ||
790 | ;How the flags are supposed to work: | |
791 | ;7 ZFL_S - Sign flag (=MSBit of result) | |
792 | ;6 ZFL_Z - Zero flag. Is 1 when the result is 0 | |
793 | ;4 ZFL_H - Half-carry (carry from bit 3 to 4) | |
794 | ;2 ZFL_P - Parity/2-complement Overflow | |
795 | ;1 ZFL_N - Subtract - set if last op was a subtract | |
796 | ;0 ZFL_C - Carry | |
797 | ; | |
798 | ;I sure hope I got the mapping between flags and instructions correct... | |
799 | ||
800 | .equ ZFL_S = 7 | |
801 | .equ ZFL_Z = 6 | |
802 | .equ ZFL_H = 4 | |
803 | .equ ZFL_P = 2 | |
804 | .equ ZFL_N = 1 | |
805 | .equ ZFL_C = 0 | |
806 | ||
807 | .equ AVR_T = SREG_T | |
808 | .equ AVR_H = SREG_H | |
809 | .equ AVR_S = SREG_S | |
810 | .equ AVR_V = SREG_V | |
811 | .equ AVR_N = SREG_N | |
812 | .equ AVR_Z = SREG_Z | |
813 | .equ AVR_C = SREG_C | |
814 | ||
815 | ;------------------------------------------------; | |
816 | ; Load table value from flash indexed by source reg. | |
817 | ; | |
818 | ; ldpmx dstreg,tablebase,indexreg | |
819 | ; | |
820 | ; (6 words, 8 cycles) | |
821 | ||
822 | .macro ldpmx | |
823 | ldi zh,high(@1*2) ; table must be page aligned | |
824 | mov zl,@2 | |
825 | lpm @0,z | |
826 | .endm | |
827 | ||
828 | .macro do_z80_flags_HP | |
829 | #if EM_Z80 | |
830 | bmov z_flags, ZFL_P, temp, AVR_V | |
831 | bmov z_flags, ZFL_H, temp, AVR_H | |
832 | #endif | |
833 | .endm | |
834 | ||
835 | .macro do_z80_flags_set_N | |
836 | #if EM_Z80 | |
837 | ori z_flags, (1<<ZFL_N) ; Negation auf 1 | |
838 | #endif | |
839 | .endm | |
840 | ||
841 | .macro do_z80_flags_set_HN | |
842 | #if EM_Z80 | |
843 | ori z_flags,(1<<ZFL_N)|(1<<ZFL_H) | |
844 | #endif | |
845 | .endm | |
846 | ||
847 | .macro do_z80_flags_clear_N | |
848 | #if EM_Z80 | |
849 | andi z_flags,~(1<<ZFL_N) | |
850 | #endif | |
851 | .endm | |
852 | ||
853 | .macro do_z80_flags_op_rotate | |
854 | ; must not change avr carry flag! | |
855 | #if EM_Z80 | |
856 | andi z_flags, ~( (1<<ZFL_H) | (1<<ZFL_N) | (1<<ZFL_C) ) | |
857 | #else | |
858 | andi z_flags, ~( (1<<ZFL_C) ) | |
859 | #endif | |
860 | .endm | |
861 | ||
862 | .macro do_z80_flags_op_and | |
863 | #if EM_Z80 | |
864 | ori z_flags,(1<<ZFL_H) | |
865 | #else | |
866 | ori z_flags,(1<<ZFL_H) | |
867 | #endif | |
868 | .endm | |
869 | ||
870 | .macro do_z80_flags_op_or | |
871 | #if EM_Z80 | |
872 | #endif | |
873 | .endm | |
874 | ||
875 | ||
876 | ;---------------------------------------------------------------- | |
877 | do_op_inv: | |
878 | printstring "Invalid opcode @ PC=" | |
879 | movw temp,z_pcl | |
880 | rcall printhexw | |
881 | haltinv: | |
882 | rjmp haltinv | |
883 | ||
884 | do_op_nop: | |
885 | ret | |
886 | ||
887 | ;---------------------------------------------------------------- | |
888 | ;|Mnemonic |SZHPNC|Description |Notes | | |
889 | ;---------------------------------------------------------------- | |
890 | ;|OUT [n],A |------|Output |[n]=A | | |
891 | ; | |
892 | ; | |
893 | ;Interface with peripherials goes here :) | |
894 | do_op_outa: ; out (opl),a | |
895 | .if PORT_DEBUG | |
896 | printnewline | |
897 | printstring "Port write: " | |
898 | mov temp,z_a | |
899 | rcall printhex | |
900 | printstring " -> (" | |
901 | mov temp,opl | |
902 | rcall printhex | |
903 | printstring ") " | |
904 | .endif | |
905 | mov temp,z_a | |
906 | mov temp2,opl | |
907 | rcall portWrite | |
908 | ret | |
909 | ||
910 | ;---------------------------------------------------------------- | |
911 | ;|Mnemonic |SZHPNC|Description |Notes | | |
912 | ;---------------------------------------------------------------- | |
913 | ;|IN A,[n] |------|Input |A=[n] | | |
914 | ; | |
915 | ; | |
916 | do_op_in: ; in a,(opl) | |
917 | .if PORT_DEBUG | |
918 | printnewline | |
919 | printstring "Port read: (" | |
920 | mov temp,opl | |
921 | rcall printhex | |
922 | printstring ") -> " | |
923 | .endif | |
924 | ||
925 | mov temp2,opl | |
926 | rcall portRead | |
927 | mov opl,temp | |
928 | ||
929 | .if PORT_DEBUG | |
930 | rcall printhex | |
931 | printstring " " | |
932 | .endif | |
933 | ret | |
934 | ||
935 | ;---------------------------------------------------------------- | |
936 | ;|Mnemonic |SZHPNC|Description |Notes | | |
937 | ;---------------------------------------------------------------- | |
938 | ;|INC r |***V0-|Increment |r=r+1 | | |
939 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
940 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
941 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
942 | ;|INC r |**-P0-|Increment |r=r+1 | | |
943 | ;|INC [HL] |**-P0-|Increment |[HL]=[HL]+1 | | |
944 | ; | |
945 | ; | |
946 | do_op_inc: | |
947 | inc opl | |
948 | #if EM_Z80 | |
949 | in temp, sreg | |
950 | #endif | |
951 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
952 | ldpmx temp2, sz53p_tab, opl | |
953 | or z_flags,temp2 ; | |
954 | do_z80_flags_HP | |
955 | ret | |
956 | ||
957 | do_op_inca: | |
958 | inc z_a | |
959 | #if EM_Z80 | |
960 | in temp, sreg | |
961 | #endif | |
962 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
963 | ldpmx temp2, sz53p_tab, z_a | |
964 | or z_flags,temp2 ; | |
965 | do_z80_flags_HP | |
966 | ret | |
967 | ||
968 | ;---------------------------------------------------------------- | |
969 | ;|Mnemonic |SZHPNC|Description |Notes | | |
970 | ;---------------------------------------------------------------- | |
971 | ;|DEC r |***V1-|Decrement |s=s-1 | | |
972 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
973 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
974 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
975 | ;|DEC r |**-P -|Increment |r=r+1 | | |
976 | ;|DEC [HL] |**-P -|Increment |[HL]=[HL]+1 | | |
977 | ; | |
978 | ; | |
979 | do_op_dec: | |
980 | dec opl | |
981 | #if EM_Z80 | |
982 | in temp, sreg | |
983 | #endif | |
984 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
985 | ldpmx temp2, sz53p_tab, opl | |
986 | or z_flags,temp2 ; | |
987 | do_z80_flags_HP | |
988 | do_z80_flags_set_N | |
989 | ret | |
990 | ||
991 | do_op_deca: | |
992 | dec z_a | |
993 | #if EM_Z80 | |
994 | in temp, sreg | |
995 | #endif | |
996 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
997 | ldpmx temp2, sz53p_tab, z_a | |
998 | or z_flags,temp2 ; | |
999 | do_z80_flags_HP | |
1000 | do_z80_flags_set_N | |
1001 | ret | |
1002 | ||
1003 | ;---------------------------------------------------------------- | |
1004 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1005 | ;---------------------------------------------------------------- | |
1006 | ;|INC xx |------|Increment |xx=xx+1 | | |
1007 | ;|INC ss |------|Increment |ss=ss+1 | | |
1008 | ; | |
1009 | ; | |
1010 | do_op_inc16: | |
1011 | subi opl,low(-1) | |
1012 | sbci oph,high(-1) | |
1013 | ret | |
1014 | ||
1015 | ;---------------------------------------------------------------- | |
1016 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1017 | ;---------------------------------------------------------------- | |
1018 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
1019 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
1020 | ; | |
1021 | ; | |
1022 | do_op_dec16: | |
1023 | subi opl, 1 | |
1024 | sbci oph, 0 | |
1025 | ret | |
1026 | ||
1027 | ;---------------------------------------------------------------- | |
1028 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1029 | ;---------------------------------------------------------------- | |
1030 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
1031 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1032 | ;|RLCA |---- *|Rotate Left Circular |A=A<- | | |
1033 | ; | |
1034 | ; | |
1035 | do_op_rlc: | |
1036 | ;Rotate Left Cyclical. All bits move 1 to the | |
1037 | ;left, the msb becomes c and lsb. | |
1038 | do_z80_flags_op_rotate | |
1039 | lsl opl | |
1040 | brcc do_op_rlc_noc | |
1041 | ori opl, 1 | |
1042 | ori z_flags, (1<<ZFL_C) | |
1043 | do_op_rlc_noc: | |
1044 | ret | |
1045 | ||
1046 | ;---------------------------------------------------------------- | |
1047 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1048 | ;---------------------------------------------------------------- | |
1049 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
1050 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1051 | ;|RRCA |---- *|Rotate Right Circular|A=->A | | |
1052 | ; | |
1053 | ; | |
1054 | do_op_rrc: | |
1055 | ;Rotate Right Cyclical. All bits move 1 to the | |
1056 | ;right, the lsb becomes c and msb. | |
1057 | do_z80_flags_op_rotate | |
1058 | lsr opl | |
1059 | brcc do_op_rrc_noc | |
1060 | ori opl, 0x80 | |
1061 | ori z_flags, (1<<ZFL_C) | |
1062 | do_op_rrc_noc: | |
1063 | ret | |
1064 | ||
1065 | ;---------------------------------------------------------------- | |
1066 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1067 | ;---------------------------------------------------------------- | |
1068 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
1069 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1070 | ;|RRA |---- *|Rotate Right Acc. |A=->{CY,A} | | |
1071 | ; | |
1072 | ; | |
1073 | do_op_rr: | |
1074 | ;Rotate Right. All bits move 1 to the right, the lsb | |
1075 | ;becomes c, c becomes msb. | |
1076 | clc ; get z80 carry to avr carry | |
1077 | sbrc z_flags,ZFL_C | |
1078 | sec | |
1079 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
1080 | bmov z_flags,ZFL_C, opl,0 ; Bit 0 --> CY | |
1081 | ror opl | |
1082 | ret | |
1083 | ||
1084 | ;---------------------------------------------------------------- | |
1085 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1086 | ;---------------------------------------------------------------- | |
1087 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
1088 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1089 | ;|RLA |---- *|Rotate Left Acc. |A={CY,A}<- | | |
1090 | ; | |
1091 | ; | |
1092 | do_op_rl: | |
1093 | ;Rotate Left. All bits move 1 to the left, the msb | |
1094 | ;becomes c, c becomes lsb. | |
1095 | clc | |
1096 | sbrc z_flags,ZFL_C | |
1097 | sec | |
1098 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
1099 | bmov z_flags,ZFL_C, opl,7 ; Bit 7 --> CY | |
1100 | rol opl | |
1101 | ret | |
1102 | ||
1103 | ;---------------------------------------------------------------- | |
1104 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1105 | ;---------------------------------------------------------------- | |
1106 | ;|ADD A,s |***V0*|Add |A=A+s | | |
1107 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1108 | ;|ADD A,s |***P *|Add |A=A+s | | |
1109 | ; | |
1110 | ; | |
1111 | do_op_adda: | |
1112 | add z_a,opl | |
1113 | in temp,sreg | |
1114 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P flag | |
1115 | bmov z_flags,ZFL_C, temp,AVR_C | |
1116 | do_z80_flags_HP | |
1117 | ret | |
1118 | ||
1119 | ;---------------------------------------------------------------- | |
1120 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1121 | ;---------------------------------------------------------------- | |
1122 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
1123 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1124 | ;|ADC A,s |***P *|Add with Carry |A=A+s+CY | | |
1125 | ; | |
1126 | ; | |
1127 | do_op_adca: | |
1128 | clc | |
1129 | sbrc z_flags,ZFL_C | |
1130 | sec | |
1131 | adc z_a,opl | |
1132 | in temp,sreg | |
1133 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
1134 | bmov z_flags,ZFL_C, temp,AVR_C | |
1135 | do_z80_flags_HP | |
1136 | ret | |
1137 | ||
1138 | ;---------------------------------------------------------------- | |
1139 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1140 | ;---------------------------------------------------------------- | |
1141 | ;|SUB s |***V1*|Subtract |A=A-s | | |
1142 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1143 | ;|SUB s |***P *|Subtract |A=A-s | | |
1144 | ||
1145 | ; | |
1146 | do_op_subfa: | |
1147 | sub z_a,opl | |
1148 | in temp,sreg | |
1149 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
1150 | bmov z_flags,ZFL_C, temp,AVR_C | |
1151 | do_z80_flags_HP | |
1152 | do_z80_flags_set_N | |
1153 | ret | |
1154 | ||
1155 | ;---------------------------------------------------------------- | |
1156 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1157 | ;---------------------------------------------------------------- | |
1158 | ;|CP s |***V1*|Compare |A-s | | |
1159 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1160 | ;|CP s |***P *|Compare |A-s | | |
1161 | ||
1162 | ; | |
1163 | do_op_cpfa: | |
1164 | mov temp,z_a | |
1165 | sub temp,opl | |
1166 | mov opl,temp | |
1167 | in temp,sreg | |
1168 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P | |
1169 | bmov z_flags,ZFL_C, temp,AVR_C | |
1170 | do_z80_flags_HP | |
1171 | do_z80_flags_set_N | |
1172 | ret | |
1173 | ||
1174 | ;---------------------------------------------------------------- | |
1175 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1176 | ;---------------------------------------------------------------- | |
1177 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
1178 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1179 | ;|SBC A,s |***P *|Subtract with Carry |A=A-s-CY | | |
1180 | ; | |
1181 | ; | |
1182 | do_op_sbcfa: | |
1183 | clc | |
1184 | sbrc z_flags,ZFL_C | |
1185 | sec | |
1186 | sbc z_a,opl | |
1187 | in temp,sreg | |
1188 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
1189 | bmov z_flags,ZFL_C, temp,AVR_C | |
1190 | do_z80_flags_HP | |
1191 | do_z80_flags_set_N | |
1192 | ret | |
1193 | ||
1194 | ;---------------------------------------------------------------- | |
1195 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1196 | ;---------------------------------------------------------------- | |
1197 | ;|AND s |**1P00|Logical AND |A=A&s | | |
1198 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1199 | ;|AND s |**-P 0|Logical AND |A=A&s | | |
1200 | ; | |
1201 | ; TODO H-Flag | |
1202 | do_op_anda: | |
1203 | and z_a,opl ; | |
1204 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P,N,C | |
1205 | do_z80_flags_op_and | |
1206 | ret | |
1207 | ||
1208 | ||
1209 | ;---------------------------------------------------------------- | |
1210 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1211 | ;---------------------------------------------------------------- | |
1212 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
1213 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1214 | ;|OR s |**-P00|Logical inclusive OR |A=Avs | | |
1215 | ; | |
1216 | ; TODO: H-Flag | |
1217 | do_op_ora: | |
1218 | or z_a,opl | |
1219 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
1220 | do_z80_flags_op_or | |
1221 | ret | |
1222 | ||
1223 | ;---------------------------------------------------------------- | |
1224 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1225 | ;---------------------------------------------------------------- | |
1226 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
1227 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1228 | ;|XOR s |**-P 0|Logical Exclusive OR |A=Axs | | |
1229 | ; | |
1230 | ; TODO: H-Flag | |
1231 | do_op_xora: | |
1232 | eor z_a,opl | |
1233 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
1234 | do_z80_flags_op_or | |
1235 | ret | |
1236 | ||
1237 | ;---------------------------------------------------------------- | |
1238 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1239 | ;---------------------------------------------------------------- | |
1240 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
1241 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1242 | ;|ADD HL,ss |---- *|Add |HL=HL+ss | | |
1243 | ; | |
1244 | ; | |
1245 | do_op_addhl: | |
1246 | lds temp,z_l | |
1247 | lds temp2,z_h | |
1248 | add opl,temp | |
1249 | adc oph,temp2 | |
1250 | in temp,sreg | |
1251 | bmov z_flags,ZFL_H, temp,AVR_H | |
1252 | bmov z_flags,ZFL_C, temp,AVR_C | |
1253 | do_z80_flags_clear_N | |
1254 | ret | |
1255 | ||
1256 | ;---------------------------------------------------------------- | |
1257 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1258 | ;---------------------------------------------------------------- | |
1259 | ;|LD dst,src|------|Load |dst=src | | |
1260 | ; | |
1261 | ; | |
1262 | do_op_sthl: ;store hl to mem loc in opl:h | |
1263 | movw xl,opl | |
1264 | lds temp,z_l | |
1265 | mem_write | |
1266 | adiw xl,1 | |
1267 | lds temp,z_h | |
1268 | mem_write | |
1269 | ret | |
1270 | ||
1271 | ;---------------------------------------------------------------- | |
1272 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1273 | ;---------------------------------------------------------------- | |
1274 | ;|LD dst,src|------|Load |dst=src | | |
1275 | ; | |
1276 | ; | |
1277 | do_op_rmem16: | |
1278 | movw xl,opl | |
1279 | mem_read_d opl | |
1280 | adiw x,1 | |
1281 | mem_read_d oph | |
1282 | ret | |
1283 | ||
1284 | ;---------------------------------------------------------------- | |
1285 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1286 | ;---------------------------------------------------------------- | |
1287 | ;|LD dst,src|------|Load |dst=src | | |
1288 | ; | |
1289 | ; | |
1290 | do_op_rmem8: | |
1291 | mem_read_ds opl, op | |
1292 | ret | |
1293 | ||
1294 | ;---------------------------------------------------------------- | |
1295 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1296 | ;---------------------------------------------------------------- | |
1297 | ;|DAA |***P-*|Decimal Adjust Acc. | | | |
1298 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1299 | ; | |
1300 | ; Not yet checked | |
1301 | ||
1302 | ; Description (http://www.z80.info/z80syntx.htm#DAA): | |
1303 | ; This instruction conditionally adjusts the accumulator for BCD addition | |
1304 | ; and subtraction operations. For addition (ADD, ADC, INC) or subtraction | |
1305 | ; (SUB, SBC, DEC, NEC), the following table indicates the operation performed: | |
1306 | ; | |
1307 | ; ------------------------------------------------------------------------------- | |
1308 | ; | | C Flag | HEX value in | H Flag | HEX value in | Number | C flag| | |
1309 | ; | Operation| Before | upper digit | Before | lower digit | added | After | | |
1310 | ; | | DAA | (bit 7-4) | DAA | (bit 3-0) | to byte | DAA | | |
1311 | ; |-----------------------------------------------------------------------------| | |
1312 | ; | | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
1313 | ; | ADD | 0 | 0-8 | 0 | A-F | 06 | 0 | | |
1314 | ; | | 0 | 0-9 | 1 | 0-3 | 06 | 0 | | |
1315 | ; | ADC | 0 | A-F | 0 | 0-9 | 60 | 1 | | |
1316 | ; | | 0 | 9-F | 0 | A-F | 66 | 1 | | |
1317 | ; | INC | 0 | A-F | 1 | 0-3 | 66 | 1 | | |
1318 | ; | | 1 | 0-2 | 0 | 0-9 | 60 | 1 | | |
1319 | ; | | 1 | 0-2 | 0 | A-F | 66 | 1 | | |
1320 | ; | | 1 | 0-3 | 1 | 0-3 | 66 | 1 | | |
1321 | ; |-----------------------------------------------------------------------------| | |
1322 | ; | SUB | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
1323 | ; | SBC | 0 | 0-8 | 1 | 6-F | FA | 0 | | |
1324 | ; | DEC | 1 | 7-F | 0 | 0-9 | A0 | 1 | | |
1325 | ; | NEG | 1 | 6-F | 1 | 6-F | 9A | 1 | | |
1326 | ; |-----------------------------------------------------------------------------| | |
1327 | ; | |
1328 | ; Flags: | |
1329 | ; C: See instruction. | |
1330 | ; N: Unaffected. | |
1331 | ; P/V: Set if Acc. is even parity after operation, reset otherwise. | |
1332 | ; H: See instruction. | |
1333 | ; Z: Set if Acc. is Zero after operation, reset otherwise. | |
1334 | ; S: Set if most significant bit of Acc. is 1 after operation, reset otherwise. | |
1335 | ||
1336 | ||
1337 | ||
1338 | #if 1 | |
1339 | do_op_da: | |
1340 | ldi oph,0 ; what to add | |
1341 | sbrc z_flags,ZFL_H ; if H-Flag | |
1342 | rjmp op_da_06 | |
1343 | mov temp,opl | |
1344 | andi temp,0x0f ; ... or lower digit > 9 | |
1345 | cpi temp,0x0a | |
1346 | brlo op_da_06n | |
1347 | op_da_06: | |
1348 | ori oph,0x06 | |
1349 | op_da_06n: | |
1350 | sbrc z_flags,(1<<ZFL_C) | |
1351 | rjmp op_da_60 | |
1352 | cpi opl,0xa0 | |
1353 | brlo op_da_60n | |
1354 | op_da_60: | |
1355 | ori oph,0x60 | |
1356 | op_da_60n: | |
1357 | cpi opl,0x9a | |
1358 | brlo op_da_99n | |
1359 | ori z_flags,(1<<ZFL_C); set C | |
1360 | op_da_99n: | |
1361 | sbrs z_flags,ZFL_N ; if sub-op | |
1362 | rjmp op_da_add ; then | |
1363 | sub opl,oph | |
1364 | rjmp op_da_ex | |
1365 | op_da_add: ; else add-op | |
1366 | cpi opl,0x91 | |
1367 | brlo op_da_60n2 | |
1368 | mov temp,opl | |
1369 | andi temp,0x0f | |
1370 | cpi temp,0x0a | |
1371 | brlo op_da_60n2 | |
1372 | ori oph,0x60 | |
1373 | op_da_60n2: | |
1374 | add opl,oph | |
1375 | op_da_ex: | |
1376 | in temp,SREG | |
1377 | sbrc temp,AVR_H | |
1378 | ori z_flags,(1<<ZFL_C) | |
1379 | andi z_flags,(1<<ZFL_N)|(1<<ZFL_C) ; preserve C,N | |
1380 | ldpmx temp2, sz53p_tab, opl ; get S,Z,P | |
1381 | or z_flags,temp2 | |
1382 | bmov z_flags,ZFL_H, temp,AVR_H ; H (?) | |
1383 | ret | |
1384 | #else | |
1385 | ||
1386 | do_op_da: | |
1387 | sbrc z_flags,ZFL_N ; if add-op | |
1388 | rjmp do_op_da_sub ; then | |
1389 | ldi temp2,0 ; | |
1390 | mov temp,opl ; | |
1391 | andi temp,0x0f ; | |
1392 | cpi temp,0x0a ; if lower digit > 9 | |
1393 | brlo do_op_da_h ; | |
1394 | ori temp2,0x06 ; add 6 to lower digit | |
1395 | do_op_da_h: ; | |
1396 | sbrc z_flags,ZFL_H ; ... or H-Flag | |
1397 | ori temp2,0x06 ; | |
1398 | add opl,temp2 ; | |
1399 | ||
1400 | ldi temp2,0 ; | |
1401 | mov temp,opl ; | |
1402 | andi temp,0xf0 ; | |
1403 | cpi temp,0xa0 ; | |
1404 | brlo do_op_da_c ; | |
1405 | ori temp2,0x60 ; | |
1406 | do_op_da_c: ; else sub-op | |
1407 | sbrc z_flags,ZFL_C ; | |
1408 | ori temp2,0x60 ; | |
1409 | andi z_flags, ~( (1<<ZFL_S) | (1<<ZFL_Z) | (1<<ZFL_H) ) | |
1410 | add opl,temp2 ; | |
1411 | in temp,SREG ; | |
1412 | bst temp,AVR_Z ;Z-Flag | |
1413 | bld z_flags,ZFL_Z ; | |
1414 | bst temp,AVR_N ;S-Flag | |
1415 | bst z_flags,ZFL_S ; | |
1416 | sbrc temp2,5 ;C-Flag, set if 0x06 added | |
1417 | ori z_flags,(1<<ZFL_C) ; | |
1418 | ;H-Flag? | |
1419 | ret | |
1420 | ||
1421 | do_op_da_sub: ;TODO: | |
1422 | rcall do_op_inv | |
1423 | ret | |
1424 | #endif | |
1425 | ||
1426 | ;---------------------------------------------------------------- | |
1427 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1428 | ;---------------------------------------------------------------- | |
1429 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
1430 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1431 | ; | |
1432 | ; | |
1433 | do_op_scf: | |
1434 | andi z_flags,~((1<<ZFL_H)|(1<<ZFL_N)) | |
1435 | ori z_flags,(1<<ZFL_C) | |
1436 | ret | |
1437 | ||
1438 | ;---------------------------------------------------------------- | |
1439 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1440 | ;---------------------------------------------------------------- | |
1441 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
1442 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1443 | ;|SCF |---- 1|Set Carry Flag |CY=1 | | |
1444 | ; | |
1445 | ;TODO: H-Flag | |
1446 | do_op_ccf: | |
1447 | do_z80_flags_clear_N | |
1448 | ldi temp,(1<<ZFL_C) | |
1449 | eor z_flags,temp | |
1450 | ret | |
1451 | ||
1452 | ;---------------------------------------------------------------- | |
1453 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1454 | ;---------------------------------------------------------------- | |
1455 | ;|CPL |--1-1-|Complement |A=~A | | |
1456 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1457 | ;|CPL |---- -|Complement |A=~A | | |
1458 | ; | |
1459 | ; | |
1460 | do_op_cpl: | |
1461 | com z_a | |
1462 | do_z80_flags_set_HN | |
1463 | ret | |
1464 | ||
1465 | ||
1466 | ;---------------------------------------------------------------- | |
1467 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1468 | ;---------------------------------------------------------------- | |
1469 | ;|PUSH xx |------|Push |-[SP]=xx | | |
1470 | ;|PUSH qq |------|Push |-[SP]=qq | | |
1471 | ; | |
1472 | ; | |
1473 | do_op_push16: | |
1474 | movw xl,z_spl | |
1475 | sbiw x,1 | |
1476 | mem_write_s oph | |
1477 | sbiw x,1 | |
1478 | mem_write_s opl | |
1479 | movw z_spl,xl | |
1480 | ||
1481 | .if STACK_DBG | |
1482 | printnewline | |
1483 | printstring "Stack push " | |
1484 | movw temp,opl | |
1485 | rcall printhexw | |
1486 | printstring ", SP is now " | |
1487 | movw temp,z_spl | |
1488 | rcall printhexw | |
1489 | printstring ". " | |
1490 | .endif | |
1491 | ||
1492 | ret | |
1493 | ||
1494 | ;---------------------------------------------------------------- | |
1495 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1496 | ;---------------------------------------------------------------- | |
1497 | ;|POP xx |------|Pop |xx=[SP]+ | | |
1498 | ;|POP qq |------|Pop |qq=[SP]+ | | |
1499 | ; | |
1500 | ; | |
1501 | do_op_pop16: | |
1502 | movw x,z_spl | |
1503 | mem_read_d opl | |
1504 | adiw x,1 | |
1505 | mem_read_d oph | |
1506 | adiw x,1 | |
1507 | movw z_spl,x | |
1508 | ||
1509 | ||
1510 | .if STACK_DBG | |
1511 | printnewline | |
1512 | printstring "Stack pop " | |
1513 | movw temp,opl | |
1514 | rcall printhexw | |
1515 | printstring ", SP is now " | |
1516 | movw temp,z_spl | |
1517 | rcall printhexw | |
1518 | printstring ". " | |
1519 | .endif | |
1520 | ret | |
1521 | ||
1522 | ;---------------------------------------------------------------- | |
1523 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1524 | ;---------------------------------------------------------------- | |
1525 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
1526 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
1527 | ; | |
1528 | ; | |
1529 | do_op_exhl: | |
1530 | lds temp,z_l | |
1531 | lds temp2,z_h | |
1532 | sts z_l,opl | |
1533 | sts z_h,oph | |
1534 | movw opl,temp | |
1535 | ret | |
1536 | ||
1537 | ;---------------------------------------------------------------- | |
1538 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1539 | ;---------------------------------------------------------------- | |
1540 | ; | |
1541 | ; TODO: Implement IFF1, IFF2 | |
1542 | do_op_di: | |
1543 | ret | |
1544 | ||
1545 | ;---------------------------------------------------------------- | |
1546 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1547 | ;---------------------------------------------------------------- | |
1548 | ; | |
1549 | ; TODO: Implement IFF1, IFF2 | |
1550 | do_op_ei: | |
1551 | ret | |
1552 | ||
1553 | ;---------------------------------------------------------------- | |
1554 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1555 | ;---------------------------------------------------------------- | |
1556 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1557 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1558 | ;|RET cc |------|Conditional Return |If cc RET | | |
1559 | ; | |
1560 | ; | |
1561 | do_op_ifnz: | |
1562 | sbrs z_flags, ZFL_Z | |
1563 | ret | |
1564 | clr insdech | |
1565 | clr insdecl | |
1566 | ret | |
1567 | ||
1568 | ;---------------------------------------------------------------- | |
1569 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1570 | ;---------------------------------------------------------------- | |
1571 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1572 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1573 | ;|RET cc |------|Conditional Return |If cc RET | | |
1574 | ; | |
1575 | ; | |
1576 | do_op_ifz: | |
1577 | sbrc z_flags, ZFL_Z | |
1578 | ret | |
1579 | clr insdech | |
1580 | clr insdecl | |
1581 | ret | |
1582 | ||
1583 | ;---------------------------------------------------------------- | |
1584 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1585 | ;---------------------------------------------------------------- | |
1586 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1587 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1588 | ;|RET cc |------|Conditional Return |If cc RET | | |
1589 | ; | |
1590 | ; | |
1591 | do_op_ifnc: | |
1592 | sbrs z_flags, ZFL_C | |
1593 | ret | |
1594 | clr insdech | |
1595 | clr insdecl | |
1596 | ret | |
1597 | ||
1598 | ;---------------------------------------------------------------- | |
1599 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1600 | ;---------------------------------------------------------------- | |
1601 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1602 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1603 | ;|RET cc |------|Conditional Return |If cc RET | | |
1604 | ; | |
1605 | ; | |
1606 | do_op_ifc: | |
1607 | sbrc z_flags, ZFL_C | |
1608 | ret | |
1609 | clr insdech | |
1610 | clr insdecl | |
1611 | ret | |
1612 | ||
1613 | ;---------------------------------------------------------------- | |
1614 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1615 | ;---------------------------------------------------------------- | |
1616 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1617 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1618 | ;|RET cc |------|Conditional Return |If cc RET | | |
1619 | ; | |
1620 | ; | |
1621 | do_op_ifpo: | |
1622 | sbrs z_flags, ZFL_P | |
1623 | ret | |
1624 | clr insdech | |
1625 | clr insdecl | |
1626 | ret | |
1627 | ||
1628 | ;---------------------------------------------------------------- | |
1629 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1630 | ;---------------------------------------------------------------- | |
1631 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1632 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1633 | ;|RET cc |------|Conditional Return |If cc RET | | |
1634 | ; | |
1635 | ; | |
1636 | do_op_ifpe: | |
1637 | sbrc z_flags, ZFL_P | |
1638 | ret | |
1639 | clr insdech | |
1640 | clr insdecl | |
1641 | ret | |
1642 | ||
1643 | ;---------------------------------------------------------------- | |
1644 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1645 | ;---------------------------------------------------------------- | |
1646 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1647 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1648 | ;|RET cc |------|Conditional Return |If cc RET | | |
1649 | ; | |
1650 | ; | |
1651 | do_op_ifp: ;sign positive, aka s=0 | |
1652 | sbrs z_flags, ZFL_S | |
1653 | ret | |
1654 | clr insdech | |
1655 | clr insdecl | |
1656 | ret | |
1657 | ||
1658 | ;---------------------------------------------------------------- | |
1659 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1660 | ;---------------------------------------------------------------- | |
1661 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1662 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1663 | ;|RET cc |------|Conditional Return |If cc RET | | |
1664 | ; | |
1665 | ; | |
1666 | do_op_ifm: ;sign negative, aka s=1 | |
1667 | sbrc z_flags, ZFL_S | |
1668 | ret | |
1669 | clr insdech | |
1670 | clr insdecl | |
1671 | ret | |
1672 | ||
1673 | ||
1674 | ; ----------------------- Opcode decoding ------------------------- | |
1675 | ||
1676 | ; Lookup table for Z80 opcodes. Translates the first byte of the instruction word into three | |
1677 | ; operations: fetch, do something, store. | |
1678 | ; The table is made of 256 words. These 16-bit words consist of | |
1679 | ; the fetch operation (bit 0-4), the processing operation (bit 10-16) and the store | |
1680 | ; operation (bit 5-9). | |
1681 | .org (PC+255) & 0xff00 | |
1682 | inst_table: | |
1683 | .dw (FETCH_NOP | OP_NOP | STORE_NOP) ; 00 NOP | |
1684 | .dw (FETCH_DIR16| OP_NOP | STORE_BC ) ; 01 nn nn LD BC,nn | |
1685 | .dw (FETCH_A | OP_NOP | STORE_MBC) ; 02 LD (BC),A | |
1686 | .dw (FETCH_BC | OP_INC16 | STORE_BC ) ; 03 INC BC | |
1687 | .dw (FETCH_B | OP_INC | STORE_B ) ; 04 INC B | |
1688 | .dw (FETCH_B | OP_DEC | STORE_B ) ; 05 DEC B | |
1689 | .dw (FETCH_DIR8 | OP_NOP | STORE_B ) ; 06 nn LD B,n | |
1690 | .dw (FETCH_A | OP_RLC | STORE_A ) ; 07 RLCA | |
1691 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 08 EX AF,AF' (Z80) | |
1692 | .dw (FETCH_BC | OP_ADDHL | STORE_HL ) ; 09 ADD HL,BC | |
1693 | .dw (FETCH_MBC | OP_NOP | STORE_A ) ; 0A LD A,(BC) | |
1694 | .dw (FETCH_BC | OP_DEC16 | STORE_BC ) ; 0B DEC BC | |
1695 | .dw (FETCH_C | OP_INC | STORE_C ) ; 0C INC C | |
1696 | .dw (FETCH_C | OP_DEC | STORE_C ) ; 0D DEC C | |
1697 | .dw (FETCH_DIR8 | OP_NOP | STORE_C ) ; 0E nn LD C,n | |
1698 | .dw (FETCH_A | OP_RRC | STORE_A ) ; 0F RRCA | |
1699 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 10 oo DJNZ o (Z80) | |
1700 | .dw (FETCH_DIR16| OP_NOP | STORE_DE ) ; 11 nn nn LD DE,nn | |
1701 | .dw (FETCH_A | OP_NOP | STORE_MDE) ; 12 LD (DE),A | |
1702 | .dw (FETCH_DE | OP_INC16 | STORE_DE ) ; 13 INC DE | |
1703 | .dw (FETCH_D | OP_INC | STORE_D ) ; 14 INC D | |
1704 | .dw (FETCH_D | OP_DEC | STORE_D ) ; 15 DEC D | |
1705 | .dw (FETCH_DIR8 | OP_NOP | STORE_D ) ; 16 nn LD D,n | |
1706 | .dw (FETCH_A | OP_RL | STORE_A ) ; 17 RLA | |
1707 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 18 oo JR o (Z80) | |
1708 | .dw (FETCH_DE | OP_ADDHL | STORE_HL ) ; 19 ADD HL,DE | |
1709 | .dw (FETCH_MDE | OP_NOP | STORE_A ) ; 1A LD A,(DE) | |
1710 | .dw (FETCH_DE | OP_DEC16 | STORE_DE ) ; 1B DEC DE | |
1711 | .dw (FETCH_E | OP_INC | STORE_E ) ; 1C INC E | |
1712 | .dw (FETCH_E | OP_DEC | STORE_E ) ; 1D DEC E | |
1713 | .dw (FETCH_DIR8 | OP_NOP | STORE_E ) ; 1E nn LD E,n | |
1714 | .dw (FETCH_A | OP_RR | STORE_A ) ; 1F RRA | |
1715 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 20 oo JR NZ,o (Z80) | |
1716 | .dw (FETCH_DIR16| OP_NOP | STORE_HL ) ; 21 nn nn LD HL,nn | |
1717 | .dw (FETCH_DIR16| OP_STHL | STORE_NOP) ; 22 nn nn LD (nn),HL | |
1718 | .dw (FETCH_HL | OP_INC16 | STORE_HL ) ; 23 INC HL | |
1719 | .dw (FETCH_H | OP_INC | STORE_H ) ; 24 INC H | |
1720 | .dw (FETCH_H | OP_DEC | STORE_H ) ; 25 DEC H | |
1721 | .dw (FETCH_DIR8 | OP_NOP | STORE_H ) ; 26 nn LD H,n | |
1722 | .dw (FETCH_A | OP_DA | STORE_A ) ; 27 DAA | |
1723 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 28 oo JR Z,o (Z80) | |
1724 | .dw (FETCH_HL | OP_ADDHL | STORE_HL ) ; 29 ADD HL,HL | |
1725 | .dw (FETCH_DIR16| OP_RMEM16 | STORE_HL ) ; 2A nn nn LD HL,(nn) | |
1726 | .dw (FETCH_HL | OP_DEC16 | STORE_HL ) ; 2B DEC HL | |
1727 | .dw (FETCH_L | OP_INC | STORE_L ) ; 2C INC L | |
1728 | .dw (FETCH_L | OP_DEC | STORE_L ) ; 2D DEC L | |
1729 | .dw (FETCH_DIR8 | OP_NOP | STORE_L ) ; 2E nn LD L,n | |
1730 | .dw (FETCH_NOP | OP_CPL | STORE_NOP) ; 2F CPL | |
1731 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 30 oo JR NC,o (Z80) | |
1732 | .dw (FETCH_DIR16| OP_NOP | STORE_SP ) ; 31 nn nn LD SP,nn | |
1733 | .dw (FETCH_DIR16| OP_NOP | STORE_AM ) ; 32 nn nn LD (nn),A | |
1734 | .dw (FETCH_SP | OP_INC16 | STORE_SP ) ; 33 INC SP | |
1735 | .dw (FETCH_MHL | OP_INC | STORE_MHL) ; 34 INC (HL) | |
1736 | .dw (FETCH_MHL | OP_DEC | STORE_MHL) ; 35 DEC (HL) | |
1737 | .dw (FETCH_DIR8 | OP_NOP | STORE_MHL) ; 36 nn LD (HL),n | |
1738 | .dw (FETCH_NOP | OP_SCF | STORE_NOP) ; 37 SCF | |
1739 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 38 oo JR C,o (Z80) | |
1740 | .dw (FETCH_SP | OP_ADDHL | STORE_HL ) ; 39 ADD HL,SP | |
1741 | .dw (FETCH_DIR16| OP_RMEM8 | STORE_A ) ; 3A nn nn LD A,(nn) | |
1742 | .dw (FETCH_SP | OP_DEC16 | STORE_SP ) ; 3B DEC SP | |
1743 | .dw (FETCH_NOP | OP_INCA | STORE_NOP) ; 3C INC A | |
1744 | .dw (FETCH_NOP | OP_DECA | STORE_NOP) ; 3D DEC A | |
1745 | .dw (FETCH_DIR8 | OP_NOP | STORE_A ) ; 3E nn LD A,n | |
1746 | .dw (FETCH_NOP | OP_CCF | STORE_NOP) ; 3F CCF (Complement Carry Flag, gvd) | |
1747 | .dw (FETCH_B | OP_NOP | STORE_B ) ; 40 LD B,r | |
1748 | .dw (FETCH_C | OP_NOP | STORE_B ) ; 41 LD B,r | |
1749 | .dw (FETCH_D | OP_NOP | STORE_B ) ; 42 LD B,r | |
1750 | .dw (FETCH_E | OP_NOP | STORE_B ) ; 43 LD B,r | |
1751 | .dw (FETCH_H | OP_NOP | STORE_B ) ; 44 LD B,r | |
1752 | .dw (FETCH_L | OP_NOP | STORE_B ) ; 45 LD B,r | |
1753 | .dw (FETCH_MHL | OP_NOP | STORE_B ) ; 46 LD B,r | |
1754 | .dw (FETCH_A | OP_NOP | STORE_B ) ; 47 LD B,r | |
1755 | .dw (FETCH_B | OP_NOP | STORE_C ) ; 48 LD C,r | |
1756 | .dw (FETCH_C | OP_NOP | STORE_C ) ; 49 LD C,r | |
1757 | .dw (FETCH_D | OP_NOP | STORE_C ) ; 4A LD C,r | |
1758 | .dw (FETCH_E | OP_NOP | STORE_C ) ; 4B LD C,r | |
1759 | .dw (FETCH_H | OP_NOP | STORE_C ) ; 4C LD C,r | |
1760 | .dw (FETCH_L | OP_NOP | STORE_C ) ; 4D LD C,r | |
1761 | .dw (FETCH_MHL | OP_NOP | STORE_C ) ; 4E LD C,r | |
1762 | .dw (FETCH_A | OP_NOP | STORE_C ) ; 4F LD C,r | |
1763 | .dw (FETCH_B | OP_NOP | STORE_D ) ; 50 LD D,r | |
1764 | .dw (FETCH_C | OP_NOP | STORE_D ) ; 51 LD D,r | |
1765 | .dw (FETCH_D | OP_NOP | STORE_D ) ; 52 LD D,r | |
1766 | .dw (FETCH_E | OP_NOP | STORE_D ) ; 53 LD D,r | |
1767 | .dw (FETCH_H | OP_NOP | STORE_D ) ; 54 LD D,r | |
1768 | .dw (FETCH_L | OP_NOP | STORE_D ) ; 55 LD D,r | |
1769 | .dw (FETCH_MHL | OP_NOP | STORE_D ) ; 56 LD D,r | |
1770 | .dw (FETCH_A | OP_NOP | STORE_D ) ; 57 LD D,r | |
1771 | .dw (FETCH_B | OP_NOP | STORE_E ) ; 58 LD E,r | |
1772 | .dw (FETCH_C | OP_NOP | STORE_E ) ; 59 LD E,r | |
1773 | .dw (FETCH_D | OP_NOP | STORE_E ) ; 5A LD E,r | |
1774 | .dw (FETCH_E | OP_NOP | STORE_E ) ; 5B LD E,r | |
1775 | .dw (FETCH_H | OP_NOP | STORE_E ) ; 5C LD E,r | |
1776 | .dw (FETCH_L | OP_NOP | STORE_E ) ; 5D LD E,r | |
1777 | .dw (FETCH_MHL | OP_NOP | STORE_E ) ; 5E LD E,r | |
1778 | .dw (FETCH_A | OP_NOP | STORE_E ) ; 5F LD E,r | |
1779 | .dw (FETCH_B | OP_NOP | STORE_H ) ; 60 LD H,r | |
1780 | .dw (FETCH_C | OP_NOP | STORE_H ) ; 61 LD H,r | |
1781 | .dw (FETCH_D | OP_NOP | STORE_H ) ; 62 LD H,r | |
1782 | .dw (FETCH_E | OP_NOP | STORE_H ) ; 63 LD H,r | |
1783 | .dw (FETCH_H | OP_NOP | STORE_H ) ; 64 LD H,r | |
1784 | .dw (FETCH_L | OP_NOP | STORE_H ) ; 65 LD H,r | |
1785 | .dw (FETCH_MHL | OP_NOP | STORE_H ) ; 66 LD H,r | |
1786 | .dw (FETCH_A | OP_NOP | STORE_H ) ; 67 LD H,r | |
1787 | .dw (FETCH_B | OP_NOP | STORE_L ) ; 68 LD L,r | |
1788 | .dw (FETCH_C | OP_NOP | STORE_L ) ; 69 LD L,r | |
1789 | .dw (FETCH_D | OP_NOP | STORE_L ) ; 6A LD L,r | |
1790 | .dw (FETCH_E | OP_NOP | STORE_L ) ; 6B LD L,r | |
1791 | .dw (FETCH_H | OP_NOP | STORE_L ) ; 6C LD L,r | |
1792 | .dw (FETCH_L | OP_NOP | STORE_L ) ; 6D LD L,r | |
1793 | .dw (FETCH_MHL | OP_NOP | STORE_L ) ; 6E LD L,r | |
1794 | .dw (FETCH_A | OP_NOP | STORE_L ) ; 6F LD L,r | |
1795 | .dw (FETCH_B | OP_NOP | STORE_MHL) ; 70 LD (HL),r | |
1796 | .dw (FETCH_C | OP_NOP | STORE_MHL) ; 71 LD (HL),r | |
1797 | .dw (FETCH_D | OP_NOP | STORE_MHL) ; 72 LD (HL),r | |
1798 | .dw (FETCH_E | OP_NOP | STORE_MHL) ; 73 LD (HL),r | |
1799 | .dw (FETCH_H | OP_NOP | STORE_MHL) ; 74 LD (HL),r | |
1800 | .dw (FETCH_L | OP_NOP | STORE_MHL) ; 75 LD (HL),r | |
1801 | .dw (FETCH_NOP | OP_NOP | STORE_NOP) ; 76 HALT | |
1802 | .dw (FETCH_A | OP_NOP | STORE_MHL) ; 77 LD (HL),r | |
1803 | .dw (FETCH_B | OP_NOP | STORE_A ) ; 78 LD A,r | |
1804 | .dw (FETCH_C | OP_NOP | STORE_A ) ; 79 LD A,r | |
1805 | .dw (FETCH_D | OP_NOP | STORE_A ) ; 7A LD A,r | |
1806 | .dw (FETCH_E | OP_NOP | STORE_A ) ; 7B LD A,r | |
1807 | .dw (FETCH_H | OP_NOP | STORE_A ) ; 7C LD A,r | |
1808 | .dw (FETCH_L | OP_NOP | STORE_A ) ; 7D LD A,r | |
1809 | .dw (FETCH_MHL | OP_NOP | STORE_A ) ; 7E LD A,r | |
1810 | .dw (FETCH_A | OP_NOP | STORE_A ) ; 7F LD A,r | |
1811 | .dw (FETCH_B | OP_ADDA | STORE_NOP) ; 80 ADD A,r | |
1812 | .dw (FETCH_C | OP_ADDA | STORE_NOP) ; 81 ADD A,r | |
1813 | .dw (FETCH_D | OP_ADDA | STORE_NOP) ; 82 ADD A,r | |
1814 | .dw (FETCH_E | OP_ADDA | STORE_NOP) ; 83 ADD A,r | |
1815 | .dw (FETCH_H | OP_ADDA | STORE_NOP) ; 84 ADD A,r | |
1816 | .dw (FETCH_L | OP_ADDA | STORE_NOP) ; 85 ADD A,r | |
1817 | .dw (FETCH_MHL | OP_ADDA | STORE_NOP) ; 86 ADD A,r | |
1818 | .dw (FETCH_A | OP_ADDA | STORE_NOP) ; 87 ADD A,r | |
1819 | .dw (FETCH_B | OP_ADCA | STORE_NOP) ; 88 ADC A,r | |
1820 | .dw (FETCH_C | OP_ADCA | STORE_NOP) ; 89 ADC A,r | |
1821 | .dw (FETCH_D | OP_ADCA | STORE_NOP) ; 8A ADC A,r | |
1822 | .dw (FETCH_E | OP_ADCA | STORE_NOP) ; 8B ADC A,r | |
1823 | .dw (FETCH_H | OP_ADCA | STORE_NOP) ; 8C ADC A,r | |
1824 | .dw (FETCH_L | OP_ADCA | STORE_NOP) ; 8D ADC A,r | |
1825 | .dw (FETCH_MHL | OP_ADCA | STORE_NOP) ; 8E ADC A,r | |
1826 | .dw (FETCH_A | OP_ADCA | STORE_NOP) ; 8F ADC A,r | |
1827 | .dw (FETCH_B | OP_SUBFA | STORE_NOP) ; 90 SUB A,r | |
1828 | .dw (FETCH_C | OP_SUBFA | STORE_NOP) ; 91 SUB A,r | |
1829 | .dw (FETCH_D | OP_SUBFA | STORE_NOP) ; 92 SUB A,r | |
1830 | .dw (FETCH_E | OP_SUBFA | STORE_NOP) ; 93 SUB A,r | |
1831 | .dw (FETCH_H | OP_SUBFA | STORE_NOP) ; 94 SUB A,r | |
1832 | .dw (FETCH_L | OP_SUBFA | STORE_NOP) ; 95 SUB A,r | |
1833 | .dw (FETCH_MHL | OP_SUBFA | STORE_NOP) ; 96 SUB A,r | |
1834 | .dw (FETCH_A | OP_SUBFA | STORE_NOP) ; 97 SUB A,r | |
1835 | .dw (FETCH_B | OP_SBCFA | STORE_NOP) ; 98 SBC A,r | |
1836 | .dw (FETCH_C | OP_SBCFA | STORE_NOP) ; 99 SBC A,r | |
1837 | .dw (FETCH_D | OP_SBCFA | STORE_NOP) ; 9A SBC A,r | |
1838 | .dw (FETCH_E | OP_SBCFA | STORE_NOP) ; 9B SBC A,r | |
1839 | .dw (FETCH_H | OP_SBCFA | STORE_NOP) ; 9C SBC A,r | |
1840 | .dw (FETCH_L | OP_SBCFA | STORE_NOP) ; 9D SBC A,r | |
1841 | .dw (FETCH_MHL | OP_SBCFA | STORE_NOP) ; 9E SBC A,r | |
1842 | .dw (FETCH_A | OP_SBCFA | STORE_NOP) ; 9F SBC A,r | |
1843 | .dw (FETCH_B | OP_ANDA | STORE_NOP) ; A0 AND A,r | |
1844 | .dw (FETCH_C | OP_ANDA | STORE_NOP) ; A1 AND A,r | |
1845 | .dw (FETCH_D | OP_ANDA | STORE_NOP) ; A2 AND A,r | |
1846 | .dw (FETCH_E | OP_ANDA | STORE_NOP) ; A3 AND A,r | |
1847 | .dw (FETCH_H | OP_ANDA | STORE_NOP) ; A4 AND A,r | |
1848 | .dw (FETCH_L | OP_ANDA | STORE_NOP) ; A5 AND A,r | |
1849 | .dw (FETCH_MHL | OP_ANDA | STORE_NOP) ; A6 AND A,r | |
1850 | .dw (FETCH_A | OP_ANDA | STORE_NOP) ; A7 AND A,r | |
1851 | .dw (FETCH_B | OP_XORA | STORE_NOP) ; A8 XOR A,r | |
1852 | .dw (FETCH_C | OP_XORA | STORE_NOP) ; A9 XOR A,r | |
1853 | .dw (FETCH_D | OP_XORA | STORE_NOP) ; AA XOR A,r | |
1854 | .dw (FETCH_E | OP_XORA | STORE_NOP) ; AB XOR A,r | |
1855 | .dw (FETCH_H | OP_XORA | STORE_NOP) ; AC XOR A,r | |
1856 | .dw (FETCH_L | OP_XORA | STORE_NOP) ; AD XOR A,r | |
1857 | .dw (FETCH_MHL | OP_XORA | STORE_NOP) ; AE XOR A,r | |
1858 | .dw (FETCH_A | OP_XORA | STORE_NOP) ; AF XOR A,r | |
1859 | .dw (FETCH_B | OP_ORA | STORE_NOP) ; B0 OR A,r | |
1860 | .dw (FETCH_C | OP_ORA | STORE_NOP) ; B1 OR A,r | |
1861 | .dw (FETCH_D | OP_ORA | STORE_NOP) ; B2 OR A,r | |
1862 | .dw (FETCH_E | OP_ORA | STORE_NOP) ; B3 OR A,r | |
1863 | .dw (FETCH_H | OP_ORA | STORE_NOP) ; B4 OR A,r | |
1864 | .dw (FETCH_L | OP_ORA | STORE_NOP) ; B5 OR A,r | |
1865 | .dw (FETCH_MHL | OP_ORA | STORE_NOP) ; B6 OR A,r | |
1866 | .dw (FETCH_A | OP_ORA | STORE_NOP) ; B7 OR A,r | |
1867 | .dw (FETCH_B | OP_CPFA | STORE_NOP) ; B8 CP A,r | |
1868 | .dw (FETCH_C | OP_CPFA | STORE_NOP) ; B9 CP A,r | |
1869 | .dw (FETCH_D | OP_CPFA | STORE_NOP) ; BA CP A,r | |
1870 | .dw (FETCH_E | OP_CPFA | STORE_NOP) ; BB CP A,r | |
1871 | .dw (FETCH_H | OP_CPFA | STORE_NOP) ; BC CP A,r | |
1872 | .dw (FETCH_L | OP_CPFA | STORE_NOP) ; BD CP A,r | |
1873 | .dw (FETCH_MHL | OP_CPFA | STORE_NOP) ; BE CP A,r | |
1874 | .dw (FETCH_A | OP_CPFA | STORE_NOP) ; BF CP A,r | |
1875 | .dw (FETCH_NOP | OP_IFNZ | STORE_RET) ; C0 RET NZ | |
1876 | .dw (FETCH_NOP | OP_POP16 | STORE_BC ) ; C1 POP BC | |
1877 | .dw (FETCH_DIR16| OP_IFNZ | STORE_PC ) ; C2 nn nn JP NZ,nn | |
1878 | .dw (FETCH_DIR16| OP_NOP | STORE_PC ) ; C3 nn nn JP nn | |
1879 | .dw (FETCH_DIR16| OP_IFNZ | STORE_CALL) ; C4 nn nn CALL NZ,nn | |
1880 | .dw (FETCH_BC | OP_PUSH16 | STORE_NOP) ; C5 PUSH BC | |
1881 | .dw (FETCH_DIR8 | OP_ADDA | STORE_NOP) ; C6 nn ADD A,n | |
1882 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; C7 RST 0 | |
1883 | .dw (FETCH_NOP | OP_IFZ | STORE_RET) ; C8 RET Z | |
1884 | .dw (FETCH_NOP | OP_NOP | STORE_RET) ; C9 RET | |
1885 | .dw (FETCH_DIR16| OP_IFZ | STORE_PC ) ; CA nn nn JP Z,nn | |
1886 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; CB (Z80 specific) | |
1887 | .dw (FETCH_DIR16| OP_IFZ | STORE_CALL) ; CC nn nn CALL Z,nn | |
1888 | .dw (FETCH_DIR16| OP_NOP | STORE_CALL) ; CD nn nn CALL nn | |
1889 | .dw (FETCH_DIR8 | OP_ADCA | STORE_NOP) ; CE nn ADC A,n | |
1890 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; CF RST 8H | |
1891 | .dw (FETCH_NOP | OP_IFNC | STORE_RET) ; D0 RET NC | |
1892 | .dw (FETCH_NOP | OP_POP16 | STORE_DE ) ; D1 POP DE | |
1893 | .dw (FETCH_DIR16| OP_IFNC | STORE_PC ) ; D2 nn nn JP NC,nn | |
1894 | .dw (FETCH_DIR8 | OP_OUTA | STORE_NOP) ; D3 nn OUT (n),A | |
1895 | .dw (FETCH_DIR16| OP_IFNC | STORE_CALL) ; D4 nn nn CALL NC,nn | |
1896 | .dw (FETCH_DE | OP_PUSH16 | STORE_NOP) ; D5 PUSH DE | |
1897 | .dw (FETCH_DIR8 | OP_SUBFA | STORE_NOP) ; D6 nn SUB n | |
1898 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; D7 RST 10H | |
1899 | .dw (FETCH_NOP | OP_IFC | STORE_RET) ; D8 RET C | |
1900 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; D9 EXX (Z80) | |
1901 | .dw (FETCH_DIR16| OP_IFC | STORE_PC ) ; DA nn nn JP C,nn | |
1902 | .dw (FETCH_DIR8 | OP_IN | STORE_A ) ; DB nn IN A,(n) | |
1903 | .dw (FETCH_DIR16| OP_IFC | STORE_CALL) ; DC nn nn CALL C,nn | |
1904 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; DD (Z80) | |
1905 | .dw (FETCH_DIR8 | OP_SBCFA | STORE_NOP) ; DE nn SBC A,n | |
1906 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; DF RST 18H | |
1907 | .dw (FETCH_NOP | OP_IFPO | STORE_RET) ; E0 RET PO | |
1908 | .dw (FETCH_NOP | OP_POP16 | STORE_HL ) ; E1 POP HL | |
1909 | .dw (FETCH_DIR16| OP_IFPO | STORE_PC ) ; E2 nn nn JP PO,nn | |
1910 | .dw (FETCH_MSP | OP_EXHL | STORE_MSP) ; E3 EX (SP),HL | |
1911 | .dw (FETCH_DIR16| OP_IFPO | STORE_CALL) ; E4 nn nn CALL PO,nn | |
1912 | .dw (FETCH_HL | OP_PUSH16 | STORE_NOP) ; E5 PUSH HL | |
1913 | .dw (FETCH_DIR8 | OP_ANDA | STORE_NOP) ; E6 nn AND n | |
1914 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; E7 RST 20H | |
1915 | .dw (FETCH_NOP | OP_IFPE | STORE_RET) ; E8 RET PE | |
1916 | .dw (FETCH_HL | OP_NOP | STORE_PC ) ; E9 JP (HL) | |
1917 | .dw (FETCH_DIR16| OP_IFPE | STORE_PC ) ; EA nn nn JP PE,nn | |
1918 | .dw (FETCH_DE | OP_EXHL | STORE_DE ) ; EB EX DE,HL | |
1919 | .dw (FETCH_DIR16| OP_IFPE | STORE_CALL) ; EC nn nn CALL PE,nn | |
1920 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; ED (Z80 specific) | |
1921 | .dw (FETCH_DIR8 | OP_XORA | STORE_NOP) ; EE nn XOR n | |
1922 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; EF RST 28H | |
1923 | .dw (FETCH_NOP | OP_IFP | STORE_RET) ; F0 RET P | |
1924 | .dw (FETCH_NOP | OP_POP16 | STORE_AF ) ; F1 POP AF | |
1925 | .dw (FETCH_DIR16| OP_IFP | STORE_PC ) ; F2 nn nn JP P,nn | |
1926 | .dw (FETCH_NOP | OP_DI | STORE_NOP) ; F3 DI | |
1927 | .dw (FETCH_DIR16| OP_IFP | STORE_CALL) ; F4 nn nn CALL P,nn | |
1928 | .dw (FETCH_AF | OP_PUSH16 | STORE_NOP) ; F5 PUSH AF | |
1929 | .dw (FETCH_DIR8 | OP_ORA | STORE_NOP) ; F6 nn OR n | |
1930 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; F7 RST 30H | |
1931 | .dw (FETCH_NOP | OP_IFM | STORE_RET) ; F8 RET M | |
1932 | .dw (FETCH_HL | OP_NOP | STORE_SP ) ; F9 LD SP,HL | |
1933 | .dw (FETCH_DIR16| OP_IFM | STORE_PC ) ; FA nn nn JP M,nn | |
1934 | .dw (FETCH_NOP | OP_EI | STORE_NOP) ; FB EI | |
1935 | .dw (FETCH_DIR16| OP_IFM | STORE_CALL) ; FC nn nn CALL M,nn | |
1936 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; FD (Z80 specific) | |
1937 | .dw (FETCH_DIR8 | OP_CPFA | STORE_NOP) ; FE nn CP n | |
1938 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; FF RST 38H | |
1939 | ||
1940 | ;---------------------------------------------------------------- | |
1941 | ; Lookup table, stolen from z80ex, Z80 emulation library. | |
1942 | ; http://z80ex.sourceforge.net/ | |
1943 | ||
1944 | ; The S, Z, 5 and 3 bits and the parity of the lookup value | |
1945 | ||
1946 | .org (PC+255) & 0xff00 | |
1947 | sz53p_tab: | |
1948 | .db 0x44,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
1949 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
1950 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
1951 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
1952 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
1953 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
1954 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
1955 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
1956 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
1957 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
1958 | .db 0x04,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
1959 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
1960 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
1961 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
1962 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
1963 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
1964 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
1965 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
1966 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
1967 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
1968 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
1969 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
1970 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
1971 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
1972 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
1973 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
1974 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
1975 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
1976 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
1977 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
1978 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
1979 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
1980 | ||
1981 | ||
1982 | ; vim:set ts=8 noet nowrap | |
1983 |