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9c15f366 L |
1 | ; 8080 Interpreter. |
2 | ; This is part of the Z80-CP/M emulator written by Sprite_tm. | |
3 | ; | |
4 | ||
5 | ; Copyright (C) 2010 Sprite_tm | |
6 | ; Copyright (C) 2010 Leo C. | |
7 | ; Copyright (C) 2010 Horst S. | |
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 | ||
9c15f366 | 27 | .dseg |
29fb1fd4 | 28 | z_regs: |
9c15f366 L |
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 | ||
29fb1fd4 L |
36 | .equ oz_b = 0 |
37 | .equ oz_c = 1 | |
38 | .equ oz_d = 2 | |
39 | .equ oz_e = 3 | |
40 | .equ oz_h = 4 | |
41 | .equ oz_l = 5 | |
42 | ||
43 | ||
44 | #if EM_Z80 | |
45 | z_b2: .byte 1 | |
46 | z_c2: .byte 1 | |
47 | z_d2: .byte 1 | |
48 | z_e2: .byte 1 | |
49 | z_h2: .byte 1 | |
50 | z_l2: .byte 1 | |
51 | z_f2: .byte 1 | |
52 | z_a2: .byte 1 | |
53 | .equ r2ofs = z_b2-z_b | |
54 | .equ oz_b2 = 6 | |
55 | .equ oz_c2 = 7 | |
56 | .equ oz_d2 = 8 | |
57 | .equ oz_e2 = 9 | |
58 | .equ oz_h2 = 10 | |
59 | .equ oz_l2 = 11 | |
60 | .equ oz_f2 = 12 | |
61 | .equ oz_a2 = 13 | |
62 | ||
63 | z_xh: .byte 1 | |
64 | z_xl: .byte 1 | |
65 | z_yh: .byte 1 | |
66 | z_yl: .byte 1 | |
67 | ||
68 | z_i: .byte 1 | |
69 | z_r: .byte 1 | |
70 | .equ oz_xh = 14 | |
71 | .equ oz_xl = 15 | |
72 | .equ oz_yh = 16 | |
73 | .equ oz_yl = 17 | |
74 | .equ oz_i = 18 | |
75 | .equ oz_r = 19 | |
76 | ||
77 | z_istat: .byte 1 | |
78 | .equ oz_istat = 20 | |
79 | ||
80 | .equ IM_MASK = 0x03 ;Mask IM 0..2 | |
81 | .equ IM0 = 0 | |
82 | .equ IM1 = 1 | |
83 | .equ IM2 = 2 | |
84 | ||
85 | .equ IFF1 = 2 ;IFF1 Flag | |
86 | .equ IFF2 = 3 ;IFF2 Flag | |
87 | ||
88 | #endif | |
89 | ||
9c15f366 L |
90 | .cseg |
91 | ||
92 | ;Init z80 | |
93 | z80_init: | |
94 | ldi z_pcl,low (IPLADDR) | |
95 | ldi z_pch,high(IPLADDR) | |
96 | ||
97 | cbi flags,trace | |
98 | printnewline | |
99 | printstring "Ok, CPU is live!" | |
100 | printnewline | |
101 | ||
102 | ;---------------------------------------------------------- | |
103 | ; 1 2 3 4 | |
104 | ;.db (low)do_store (low)do_op (hihg)do_op (low)do_fetch | |
105 | ; | |
106 | ;das kommt auf den stapel | |
107 | ; main da solls zum schluss weitergehen | |
108 | ;do_store wohin damit beenden mit RET | |
109 | ;do_op was tun beenden mit RET | |
110 | ; | |
111 | ;das wird direkt angesprungen | |
112 | ;do_fetch woher beenden mit RET | |
113 | ; | |
114 | ; | |
115 | main: | |
116 | .if INS_DEBUG | |
117 | cbi flags,trace | |
118 | cpi z_pch,DBG_TRACE_BOTTOM | |
119 | brlo notraceon | |
120 | cpi z_pch,DBG_TRACE_TOP | |
121 | brsh notraceon | |
122 | sbi flags,trace | |
123 | notraceon: | |
124 | .endif | |
125 | ||
9c15f366 L |
126 | .if PRINT_PC |
127 | cpi z_pch,DBG_TRACE_BOTTOM | |
128 | brlo noprintpc | |
129 | cpi z_pch,DBG_TRACE_TOP | |
130 | brsh noprintpc | |
131 | ||
132 | printnewline | |
133 | printstring "PC=" | |
134 | movw temp,z_pcl | |
29fb1fd4 | 135 | lcall printhexw |
9c15f366 L |
136 | printstring " " |
137 | noprintpc: | |
138 | .endif | |
139 | ||
140 | .if INS_DEBUG | |
141 | sbic flags,trace | |
142 | rcall printregs | |
143 | .endif | |
144 | ||
145 | ;hier kommt die Interruptbehandlung rein | |
146 | ||
147 | ldi zl,low(main) ;da will ich wieder hin. | |
148 | ldi zh,high(main) ; | |
149 | push zl ; | |
150 | push zh ; | |
151 | mem_read_s z_pc ;temp=memReadByte(z_pc) | |
152 | adiw z_pcl,1 ;++z_pc | |
153 | ldi zl,low(todo_table*2) ;zhl=todo_table | |
154 | ldi zh,high(todo_table*2) ; | |
155 | ldi temp2,3 ;1 | |
156 | mul temp,temp2 ;2 | |
157 | add zl,r0 ;1 | |
158 | adc zh,r1 ;1 | |
159 | ||
160 | ldi temp2,high(store_ops) ; | |
161 | lpm temp,Z+ ;do_store | |
162 | push temp ; low | |
163 | push temp2 ; high | |
164 | ||
165 | .if high(opjumps) != high(opjumps) | |
166 | ldi temp2,high(opjumps) | |
167 | .endif | |
168 | lpm temp,Z+ ;do_op | |
169 | push temp ; low | |
170 | push temp2 ; high | |
171 | ||
172 | lpm zl,Z ;do_fetch | |
173 | ldi zh,high(fetch_ops) | |
174 | ijmp ;direkt | |
175 | ||
176 | ||
177 | ; .listmac | |
178 | ;----------------------------------------------------- | |
179 | ; Generate jump to target and position in table | |
180 | ; gen_opjmp target | |
181 | ; | |
182 | .macro gen_opjmp | |
183 | .ifndef opjmp_table_pos_ | |
184 | .set opjmp_table_page_ = high(PC) | |
185 | .set opjmp_table_pos_ = PC | |
186 | .endif | |
187 | .equ @0 = low(opjmp_table_pos_) | |
188 | .set opjmp_table_pos_ = opjmp_table_pos_ + 1 | |
189 | .if high(opjmp_table_pos_) != opjmp_table_page_ | |
190 | .warning "Table 'opjump' crosses page boarder." | |
191 | .message "Program will not work, unless the opjump table is relocated." | |
192 | .endif | |
193 | rjmp do_@0 | |
194 | .endm | |
195 | ||
196 | ;-------------------------------------------------- | |
197 | ; Generate a table entry for one instruction | |
198 | ; | |
199 | ; instr fetch, op, store | |
200 | ; | |
201 | .macro instr | |
202 | .ifndef inst_table_odd_ | |
203 | .set inst_table_odd_ = 0 | |
204 | .endif | |
205 | ||
206 | .if inst_table_odd_ | |
207 | .db inst_table_next_, low(@2), @1, low(@0) | |
208 | .set inst_table_odd_ = 0 | |
209 | .else | |
210 | .set inst_table_next_ = low(@0) | |
211 | .db low(@2), @1 | |
212 | .set inst_table_odd_ = 1 | |
213 | .endif | |
214 | .endm | |
215 | ||
216 | ;----------------------------------- | |
217 | ; go to op. | |
218 | ; | |
219 | .macro fetch_end | |
220 | ldi zh,high(opjumps) | |
221 | mov zl,insdech | |
222 | ijmp | |
223 | .endm | |
224 | ||
225 | ;----------------------------------- | |
226 | ; go to store. | |
227 | ; | |
228 | .macro op_end | |
229 | ldi zh,high(store_ops) ; | |
230 | mov zl,insdecl | |
231 | ijmp | |
232 | .endm | |
233 | ||
234 | ;----------------------------------- | |
235 | ; go back to main | |
236 | ; | |
237 | .macro store_end | |
238 | rjmp main | |
239 | .endm | |
240 | ||
241 | ;----------------------------------- | |
242 | ; go back to main | |
243 | ; | |
244 | .macro op_end_nojmp | |
245 | rjmp main | |
246 | .endm | |
247 | ||
248 | ||
249 | ; ------------ Fetch phase stuff ----------------- | |
250 | ||
251 | .org (PC+255) & 0xff00 ; wichtig !!!fetch und store muessen in einer page liegen | |
252 | fetch_ops: | |
253 | do_fetch_nop: | |
254 | ret | |
255 | ||
256 | do_fetch_a: | |
257 | mov opl,z_a | |
258 | ret | |
259 | ||
260 | do_fetch_b: | |
261 | lds opl,z_b | |
262 | ret | |
263 | ||
264 | do_fetch_c: | |
265 | lds opl,z_c | |
266 | ret | |
267 | ||
268 | do_fetch_d: | |
269 | lds opl,z_d | |
270 | ret | |
271 | ||
272 | do_fetch_e: | |
273 | lds opl,z_e | |
274 | ret | |
275 | ||
276 | do_fetch_h: | |
277 | lds opl,z_h | |
278 | ret | |
279 | ||
280 | do_fetch_l: | |
281 | lds opl,z_l | |
282 | ret | |
283 | ||
284 | do_fetch_af: | |
285 | mov opl,z_flags | |
286 | mov oph,z_a | |
287 | ret | |
288 | ||
289 | do_fetch_bc: | |
290 | lds opl,z_c | |
291 | lds oph,z_b | |
292 | ret | |
293 | ||
294 | do_fetch_de: | |
295 | lds opl,z_e | |
296 | lds oph,z_d | |
297 | ret | |
298 | ||
299 | do_fetch_hl: | |
300 | lds opl,z_l | |
301 | lds oph,z_h | |
302 | ret | |
303 | ||
304 | do_fetch_sp: | |
305 | movw opl,z_spl | |
306 | ret | |
307 | ||
308 | do_fetch_mbc: | |
309 | lds xh,z_b | |
310 | lds xl,z_c | |
f24b3c79 | 311 | mem_read_d z_a |
9c15f366 L |
312 | ret |
313 | ||
314 | do_fetch_mde: | |
315 | lds xh,z_d | |
316 | lds xl,z_e | |
f24b3c79 | 317 | mem_read_d z_a |
9c15f366 L |
318 | ret |
319 | ||
320 | do_fetch_mhl: | |
321 | lds xh,z_h | |
322 | lds xl,z_l | |
323 | mem_read_d opl | |
324 | ret | |
325 | ||
326 | do_fetch_msp: | |
327 | movw x,z_spl | |
328 | mem_read_d opl | |
329 | adiw x,1 | |
330 | mem_read_d oph | |
331 | ret | |
332 | ||
333 | do_fetch_dir8: | |
334 | mem_read_ds opl, z_pc | |
335 | adiw z_pcl,1 | |
336 | ret | |
337 | ||
338 | do_fetch_dir16: | |
339 | mem_read_ds opl, z_pc | |
340 | adiw z_pcl,1 | |
341 | mem_read_ds oph, z_pc | |
342 | adiw z_pcl,1 | |
343 | ret | |
344 | ||
345 | do_fetch_rst: | |
346 | movw x,z_pcl | |
347 | sbiw x,1 | |
348 | mem_read_d opl | |
349 | andi opl,0x38 | |
350 | ldi oph,0 | |
351 | ret | |
352 | ||
353 | ; ------------ Store phase stuff ----------------- | |
354 | ||
355 | .org (PC+255) & 0xff00 ; wichtig !!!fetch und store muessen in einer page liegen | |
356 | store_ops: | |
357 | do_store_nop: | |
358 | ret | |
359 | ||
360 | do_store_a: | |
361 | mov z_a,opl | |
362 | ret | |
363 | ||
364 | do_store_b: | |
365 | sts z_b,opl | |
366 | ret | |
367 | ||
368 | do_store_c: | |
369 | sts z_c,opl | |
370 | ret | |
371 | ||
372 | do_store_d: | |
373 | sts z_d,opl | |
374 | ret | |
375 | ||
376 | do_store_e: | |
377 | sts z_e,opl | |
378 | ret | |
379 | ||
380 | do_store_h: | |
381 | sts z_h,opl | |
382 | ret | |
383 | ||
384 | do_store_l: | |
385 | sts z_l,opl | |
386 | ret | |
387 | ||
388 | do_store_af: | |
389 | mov z_a,oph | |
390 | mov z_flags,opl | |
391 | ret | |
392 | ||
393 | do_store_bc: | |
394 | sts z_b,oph | |
395 | sts z_c,opl | |
396 | ret | |
397 | ||
398 | do_store_de: | |
399 | sts z_d,oph | |
400 | sts z_e,opl | |
401 | ret | |
402 | ||
403 | do_store_hl: | |
404 | sts z_h,oph | |
405 | sts z_l,opl | |
406 | ret | |
407 | ||
408 | do_store_mbc: | |
409 | lds xh,z_b | |
410 | lds xl,z_c | |
f24b3c79 | 411 | mem_write_s z_a |
9c15f366 L |
412 | ret |
413 | ||
414 | do_store_mde: | |
415 | lds xh,z_d | |
416 | lds xl,z_e | |
f24b3c79 | 417 | mem_write_s z_a |
9c15f366 L |
418 | ret |
419 | ||
420 | do_store_mhl: | |
421 | lds xh,z_h | |
422 | lds xl,z_l | |
423 | mem_write_s opl | |
424 | ret | |
425 | ||
426 | do_store_msp: | |
427 | movw xl,z_spl | |
428 | mem_write_s opl | |
429 | adiw xl,1 | |
430 | mem_write_s oph | |
431 | ret | |
432 | ||
433 | do_store_sp: | |
434 | movw z_spl,opl | |
435 | ret | |
436 | ||
437 | do_store_pc: | |
438 | movw z_pcl,opl | |
439 | ret | |
440 | ||
441 | do_store_ret: | |
442 | movw x,z_spl | |
443 | mem_read_d z_pcl | |
444 | adiw x,1 | |
445 | mem_read_d z_pch | |
446 | adiw x,1 | |
447 | movw z_spl,x | |
448 | ||
449 | .if STACK_DBG | |
450 | printnewline | |
451 | printstring "Stack pop " | |
452 | movw temp,z_pcl | |
453 | rcall printhexw | |
454 | printstring ", SP is now " | |
455 | movw temp,z_spl | |
456 | rcall printhexw | |
457 | printstring ". " | |
458 | .endif | |
459 | ret | |
460 | ||
461 | do_store_call: | |
462 | movw xl,z_spl | |
463 | sbiw x,1 | |
464 | mem_write_s z_pch | |
465 | sbiw x,1 | |
466 | mem_write_s z_pcl | |
467 | movw z_spl,xl | |
468 | ||
469 | .if STACK_DBG | |
470 | printnewline | |
471 | printstring "Stack push " | |
472 | movw temp,z_pcl | |
473 | rcall printhexw | |
474 | printstring ", SP is now " | |
475 | movw temp,z_spl | |
476 | rcall printhexw | |
477 | printstring ". " | |
478 | .endif | |
479 | movw z_pcl,opl | |
480 | ret | |
481 | ||
482 | ||
483 | do_store_am: | |
484 | mem_write_ds op, z_a | |
485 | ret | |
486 | ||
f24b3c79 | 487 | |
9c15f366 L |
488 | ; ------------ Operation phase stuff ----------------- |
489 | ||
490 | ;.org (PC+255) & 0xff00 | |
491 | ||
492 | opjumps: | |
493 | gen_opjmp op_nop | |
494 | gen_opjmp op_inc | |
495 | gen_opjmp op_dec | |
496 | gen_opjmp op_inc16 | |
497 | gen_opjmp op_dec16 | |
f1deeee3 L |
498 | gen_opjmp op_rlca |
499 | gen_opjmp op_rrca | |
500 | gen_opjmp op_rra | |
501 | gen_opjmp op_rla | |
9c15f366 L |
502 | gen_opjmp op_adda |
503 | gen_opjmp op_adca | |
504 | gen_opjmp op_subfa | |
505 | gen_opjmp op_sbcfa | |
506 | gen_opjmp op_anda | |
507 | gen_opjmp op_ora | |
508 | gen_opjmp op_xora | |
509 | gen_opjmp op_addhl | |
510 | gen_opjmp op_sthl | |
511 | gen_opjmp op_rmem16 | |
512 | gen_opjmp op_rmem8 | |
513 | gen_opjmp op_da | |
514 | gen_opjmp op_scf | |
515 | gen_opjmp op_cpl | |
516 | gen_opjmp op_ccf | |
517 | gen_opjmp op_pop16 | |
518 | gen_opjmp op_push16 | |
519 | gen_opjmp op_ifnz | |
520 | gen_opjmp op_ifz | |
521 | gen_opjmp op_ifnc | |
522 | gen_opjmp op_ifc | |
523 | gen_opjmp op_ifpo | |
524 | gen_opjmp op_ifpe | |
525 | gen_opjmp op_ifp | |
526 | gen_opjmp op_ifm | |
527 | gen_opjmp op_outa | |
29fb1fd4 | 528 | gen_opjmp op_ina |
9c15f366 L |
529 | gen_opjmp op_exhl |
530 | gen_opjmp op_di | |
531 | gen_opjmp op_ei | |
532 | gen_opjmp op_inv | |
533 | gen_opjmp op_cpfa | |
534 | gen_opjmp op_inca | |
535 | gen_opjmp op_deca | |
536 | ||
537 | ||
538 | ;---------------------------------------------------------------- | |
539 | ;| | | |
540 | ;| Zilog | | |
541 | ;| | | |
542 | ;| ZZZZZZZ 88888 000 | | |
543 | ;| Z 8 8 0 0 | | |
544 | ;| Z 8 8 0 0 0 | | |
545 | ;| Z 88888 0 0 0 | | |
546 | ;| Z 8 8 0 0 0 | | |
547 | ;| Z 8 8 0 0 | | |
548 | ;| ZZZZZZZ 88888 000 | | |
549 | ;| | | |
550 | ;| Z80 MICROPROCESSOR Instruction Set Summary | | |
551 | ;| | | |
552 | ;---------------------------------------------------------------- | |
553 | ;---------------------------------------------------------------- | |
554 | ;|Mnemonic |SZHPNC|Description |Notes | | |
555 | ;|----------+------+---------------------+----------------------| | |
556 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
557 | ;|ADC HL,ss |**?V0*|Add with Carry |HL=HL+ss+CY | | |
558 | ;|ADD A,s |***V0*|Add |A=A+s | | |
29fb1fd4 L |
559 | ;|ADD HL,ss |--*-0*|Add |HL=HL+ss | |
560 | ;|ADD IX,pp |--*-0*|Add |IX=IX+pp | | |
561 | ;|ADD IY,rr |--*-0*|Add |IY=IY+rr | | |
9c15f366 L |
562 | ;|AND s |**1P00|Logical AND |A=A&s | |
563 | ;|BIT b,m |?*1?0-|Test Bit |m&{2^b} | | |
564 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
565 | ;|CALL nn |------|Unconditional Call |-[SP]=PC,PC=nn | | |
566 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
567 | ;|CP s |***V1*|Compare |A-s | | |
568 | ;|CPD |****1-|Compare and Decrement|A-[HL],HL=HL-1,BC=BC-1| | |
569 | ;|CPDR |****1-|Compare, Dec., Repeat|CPD till A=[HL]or BC=0| | |
570 | ;|CPI |****1-|Compare and Increment|A-[HL],HL=HL+1,BC=BC-1| | |
571 | ;|CPIR |****1-|Compare, Inc., Repeat|CPI till A=[HL]or BC=0| | |
572 | ;|CPL |--1-1-|Complement |A=~A | | |
573 | ;|DAA |***P-*|Decimal Adjust Acc. |A=BCD format | | |
574 | ;|DEC s |***V1-|Decrement |s=s-1 | | |
575 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
576 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
29fb1fd4 | 577 | ;|DI |------|Disable Interrupts |IFF1 = IFF2 = 0 | |
9c15f366 | 578 | ;|DJNZ e |------|Dec., Jump Non-Zero |B=B-1 till B=0 | |
29fb1fd4 | 579 | ;|EI |------|Enable Interrupts |IFF1 = IFF2 = 1 | |
9c15f366 L |
580 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | |
581 | ;|EX [SP],xx|------|Exchange |[SP]<->xx | | |
582 | ;|EX AF,AF' |------|Exchange |AF<->AF' | | |
583 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
584 | ;|EXX |------|Exchange |qq<->qq' (except AF)| | |
585 | ;|HALT |------|Halt | | | |
586 | ;|IM n |------|Interrupt Mode | (n=0,1,2)| | |
587 | ;|IN A,[n] |------|Input |A=[n] | | |
588 | ;|IN r,[C] |***P0-|Input |r=[C] | | |
589 | ;|INC r |***V0-|Increment |r=r+1 | | |
590 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
591 | ;|INC xx |------|Increment |xx=xx+1 | | |
592 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
593 | ;|INC ss |------|Increment |ss=ss+1 | | |
594 | ;|IND |?*??1-|Input and Decrement |[HL]=[C],HL=HL-1,B=B-1| | |
595 | ;|INDR |?1??1-|Input, Dec., Repeat |IND till B=0 | | |
596 | ;|INI |?*??1-|Input and Increment |[HL]=[C],HL=HL+1,B=B-1| | |
597 | ;|INIR |?1??1-|Input, Inc., Repeat |INI till B=0 | | |
598 | ;|JP [HL] |------|Unconditional Jump |PC=[HL] | | |
599 | ;|JP [xx] |------|Unconditional Jump |PC=[xx] | | |
600 | ;|JP nn |------|Unconditional Jump |PC=nn | | |
601 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
602 | ;|JR e |------|Unconditional Jump |PC=PC+e | | |
603 | ;|JR cc,e |------|Conditional Jump |If cc JR(cc=C,NC,NZ,Z)| | |
604 | ;|LD dst,src|------|Load |dst=src | | |
605 | ;|LD A,i |**0*0-|Load |A=i (i=I,R)| | |
606 | ;|LDD |--0*0-|Load and Decrement |[DE]=[HL],HL=HL-1,# | | |
607 | ;|LDDR |--000-|Load, Dec., Repeat |LDD till BC=0 | | |
608 | ;|LDI |--0*0-|Load and Increment |[DE]=[HL],HL=HL+1,# | | |
609 | ;|LDIR |--000-|Load, Inc., Repeat |LDI till BC=0 | | |
610 | ;|NEG |***V1*|Negate |A=-A | | |
611 | ;|NOP |------|No Operation | | | |
612 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
613 | ;|OTDR |?1??1-|Output, Dec., Repeat |OUTD till B=0 | | |
614 | ;|OTIR |?1??1-|Output, Inc., Repeat |OUTI till B=0 | | |
615 | ;|OUT [C],r |------|Output |[C]=r | | |
616 | ;|OUT [n],A |------|Output |[n]=A | | |
617 | ;|OUTD |?*??1-|Output and Decrement |[C]=[HL],HL=HL-1,B=B-1| | |
618 | ;|OUTI |?*??1-|Output and Increment |[C]=[HL],HL=HL+1,B=B-1| | |
619 | ;|POP xx |------|Pop |xx=[SP]+ | | |
620 | ;|POP qq |------|Pop |qq=[SP]+ | | |
621 | ;|PUSH xx |------|Push |-[SP]=xx | | |
622 | ;|PUSH qq |------|Push |-[SP]=qq | | |
623 | ;|RES b,m |------|Reset bit |m=m&{~2^b} | | |
624 | ;|RET |------|Return |PC=[SP]+ | | |
625 | ;|RET cc |------|Conditional Return |If cc RET | | |
626 | ;|RETI |------|Return from Interrupt|PC=[SP]+ | | |
627 | ;|RETN |------|Return from NMI |PC=[SP]+ | | |
628 | ;|RL m |**0P0*|Rotate Left |m={CY,m}<- | | |
629 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
630 | ;|RLC m |**0P0*|Rotate Left Circular |m=m<- | | |
631 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
632 | ;|RLD |**0P0-|Rotate Left 4 bits |{A,[HL]}={A,[HL]}<- ##| | |
633 | ;|RR m |**0P0*|Rotate Right |m=->{CY,m} | | |
634 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
635 | ;|RRC m |**0P0*|Rotate Right Circular|m=->m | | |
636 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
637 | ;|RRD |**0P0-|Rotate Right 4 bits |{A,[HL]}=->{A,[HL]} ##| | |
638 | ;|RST p |------|Restart | (p=0H,8H,10H,...,38H)| | |
639 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
29fb1fd4 | 640 | ;|SBC HL,ss |***V1*|Subtract with Carry |HL=HL-ss-CY | |
9c15f366 L |
641 | ;|SCF |--0-01|Set Carry Flag |CY=1 | |
642 | ;|SET b,m |------|Set bit |m=mv{2^b} | | |
643 | ;|SLA m |**0P0*|Shift Left Arithmetic|m=m*2 | | |
644 | ;|SRA m |**0P0*|Shift Right Arith. |m=m/2 | | |
645 | ;|SRL m |**0P0*|Shift Right Logical |m=->{0,m,CY} | | |
646 | ;|SUB s |***V1*|Subtract |A=A-s | | |
647 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
648 | ;|----------+------+--------------------------------------------| | |
649 | ;| F |-*01? |Flag unaffected/affected/reset/set/unknown | | |
650 | ;| S |S |Sign flag (Bit 7) | | |
651 | ;| Z | Z |Zero flag (Bit 6) | | |
652 | ;| HC | H |Half Carry flag (Bit 4) | | |
653 | ;| P/V | P |Parity/Overflow flag (Bit 2, V=overflow) | | |
654 | ;| N | N |Add/Subtract flag (Bit 1) | | |
655 | ;| CY | C|Carry flag (Bit 0) | | |
656 | ;|-----------------+--------------------------------------------| | |
657 | ;| n |Immediate addressing | | |
658 | ;| nn |Immediate extended addressing | | |
659 | ;| e |Relative addressing (PC=PC+2+offset) | | |
660 | ;| [nn] |Extended addressing | | |
661 | ;| [xx+d] |Indexed addressing | | |
662 | ;| r |Register addressing | | |
663 | ;| [rr] |Register indirect addressing | | |
664 | ;| |Implied addressing | | |
665 | ;| b |Bit addressing | | |
666 | ;| p |Modified page zero addressing (see RST) | | |
667 | ;|-----------------+--------------------------------------------| | |
668 | ;|DEFB n(,...) |Define Byte(s) | | |
669 | ;|DEFB 'str'(,...) |Define Byte ASCII string(s) | | |
670 | ;|DEFS nn |Define Storage Block | | |
671 | ;|DEFW nn(,...) |Define Word(s) | | |
672 | ;|-----------------+--------------------------------------------| | |
673 | ;| A B C D E |Registers (8-bit) | | |
674 | ;| AF BC DE HL |Register pairs (16-bit) | | |
675 | ;| F |Flag register (8-bit) | | |
676 | ;| I |Interrupt page address register (8-bit) | | |
677 | ;| IX IY |Index registers (16-bit) | | |
678 | ;| PC |Program Counter register (16-bit) | | |
679 | ;| R |Memory Refresh register | | |
680 | ;| SP |Stack Pointer register (16-bit) | | |
681 | ;|-----------------+--------------------------------------------| | |
682 | ;| b |One bit (0 to 7) | | |
683 | ;| cc |Condition (C,M,NC,NZ,P,PE,PO,Z) | | |
684 | ;| d |One-byte expression (-128 to +127) | | |
685 | ;| dst |Destination s, ss, [BC], [DE], [HL], [nn] | | |
686 | ;| e |One-byte expression (-126 to +129) | | |
687 | ;| m |Any register r, [HL] or [xx+d] | | |
688 | ;| n |One-byte expression (0 to 255) | | |
689 | ;| nn |Two-byte expression (0 to 65535) | | |
690 | ;| pp |Register pair BC, DE, IX or SP | | |
691 | ;| qq |Register pair AF, BC, DE or HL | | |
692 | ;| qq' |Alternative register pair AF, BC, DE or HL | | |
693 | ;| r |Register A, B, C, D, E, H or L | | |
694 | ;| rr |Register pair BC, DE, IY or SP | | |
695 | ;| s |Any register r, value n, [HL] or [xx+d] | | |
696 | ;| src |Source s, ss, [BC], [DE], [HL], nn, [nn] | | |
697 | ;| ss |Register pair BC, DE, HL or SP | | |
698 | ;| xx |Index register IX or IY | | |
699 | ;|-----------------+--------------------------------------------| | |
700 | ;| + - * / ^ |Add/subtract/multiply/divide/exponent | | |
701 | ;| & ~ v x |Logical AND/NOT/inclusive OR/exclusive OR | | |
702 | ;| <- -> |Rotate left/right | | |
703 | ;| [ ] |Indirect addressing | | |
704 | ;| [ ]+ -[ ] |Indirect addressing auto-increment/decrement| | |
705 | ;| { } |Combination of operands | | |
706 | ;| # |Also BC=BC-1,DE=DE-1 | | |
707 | ;| ## |Only lower 4 bits of accumulator A used | | |
708 | ;---------------------------------------------------------------- | |
709 | ||
710 | ;How the flags are supposed to work: | |
711 | ;7 ZFL_S - Sign flag (=MSBit of result) | |
712 | ;6 ZFL_Z - Zero flag. Is 1 when the result is 0 | |
713 | ;4 ZFL_H - Half-carry (carry from bit 3 to 4) | |
714 | ;2 ZFL_P - Parity/2-complement Overflow | |
715 | ;1 ZFL_N - Subtract - set if last op was a subtract | |
716 | ;0 ZFL_C - Carry | |
717 | ; | |
718 | ;I sure hope I got the mapping between flags and instructions correct... | |
719 | ||
720 | .equ ZFL_S = 7 | |
721 | .equ ZFL_Z = 6 | |
722 | .equ ZFL_H = 4 | |
723 | .equ ZFL_P = 2 | |
724 | .equ ZFL_N = 1 | |
725 | .equ ZFL_C = 0 | |
726 | ||
727 | .equ AVR_T = SREG_T | |
728 | .equ AVR_H = SREG_H | |
729 | .equ AVR_S = SREG_S | |
730 | .equ AVR_V = SREG_V | |
731 | .equ AVR_N = SREG_N | |
732 | .equ AVR_Z = SREG_Z | |
733 | .equ AVR_C = SREG_C | |
734 | ||
735 | ;------------------------------------------------; | |
736 | ; Load table value from flash indexed by source reg. | |
737 | ; | |
738 | ;ldpmx dstreg,tablebase,indexreg | |
739 | ; | |
740 | ; (6 words, 8 cycles) | |
741 | ||
742 | .macro ldpmx | |
743 | ldi zh,high(@1*2) ; table must be page aligned | |
744 | mov zl,@2 | |
745 | lpm @0,z | |
746 | .endm | |
747 | ||
f24b3c79 | 748 | .macro do_z80_flags_V |
9c15f366 L |
749 | #if EM_Z80 |
750 | bmov z_flags, ZFL_P, temp, AVR_V | |
9c15f366 L |
751 | #endif |
752 | .endm | |
753 | ||
29fb1fd4 L |
754 | .macro do_z80_flags_H |
755 | #if EM_Z80 | |
756 | bmov z_flags, ZFL_H, temp, AVR_H | |
757 | #endif | |
758 | .endm | |
759 | ||
9c15f366 L |
760 | .macro do_z80_flags_set_N |
761 | #if EM_Z80 | |
762 | ori z_flags, (1<<ZFL_N) ; Negation auf 1 | |
763 | #endif | |
764 | .endm | |
765 | ||
766 | .macro do_z80_flags_set_HN | |
767 | #if EM_Z80 | |
768 | ori z_flags,(1<<ZFL_N)|(1<<ZFL_H) | |
769 | #endif | |
770 | .endm | |
771 | ||
772 | .macro do_z80_flags_clear_N | |
773 | #if EM_Z80 | |
774 | andi z_flags,~(1<<ZFL_N) | |
775 | #endif | |
776 | .endm | |
777 | ||
f24b3c79 L |
778 | .macro do_z80_flags_clear_HN |
779 | #if EM_Z80 | |
780 | andi z_flags,~((1<<ZFL_H)|(1<<ZFL_N)) | |
781 | #endif | |
782 | .endm | |
783 | ||
784 | ||
785 | .macro do_z80_flags_copy_HC | |
786 | #if EM_Z80 | |
787 | bmov z_flags, ZFL_H, z_flags, ZFL_H | |
788 | #endif | |
789 | .endm | |
790 | ||
9c15f366 L |
791 | .macro do_z80_flags_op_rotate |
792 | ; must not change avr carry flag! | |
793 | #if EM_Z80 | |
794 | andi z_flags, ~( (1<<ZFL_H) | (1<<ZFL_N) | (1<<ZFL_C) ) | |
795 | #else | |
796 | andi z_flags, ~( (1<<ZFL_C) ) | |
797 | #endif | |
798 | .endm | |
799 | ||
800 | .macro do_z80_flags_op_and | |
801 | #if EM_Z80 | |
802 | ori z_flags,(1<<ZFL_H) | |
9c15f366 L |
803 | #endif |
804 | .endm | |
805 | ||
806 | .macro do_z80_flags_op_or | |
807 | #if EM_Z80 | |
f24b3c79 | 808 | ;nothing to do |
9c15f366 L |
809 | #endif |
810 | .endm | |
811 | ||
812 | ||
813 | ;---------------------------------------------------------------- | |
814 | ||
815 | do_op_inv: | |
f24b3c79 L |
816 | sbiw z_pcl,1 |
817 | lcall printregs | |
818 | printstring "Invalid opcode! " | |
9c15f366 L |
819 | |
820 | haltinv: | |
821 | rjmp haltinv | |
822 | ||
823 | do_op_nop: | |
824 | ret | |
825 | ||
826 | ;---------------------------------------------------------------- | |
827 | ;|Mnemonic |SZHPNC|Description |Notes | | |
828 | ;---------------------------------------------------------------- | |
829 | ;|OUT [n],A |------|Output |[n]=A | | |
830 | ; | |
831 | ; | |
832 | ;Interface with peripherials goes here :) | |
833 | do_op_outa: ; out (opl),a | |
834 | .if PORT_DEBUG | |
835 | printnewline | |
836 | printstring "Port write: " | |
837 | mov temp,z_a | |
29fb1fd4 | 838 | lcall printhex |
9c15f366 L |
839 | printstring " -> (" |
840 | mov temp,opl | |
29fb1fd4 | 841 | lcall printhex |
9c15f366 L |
842 | printstring ") " |
843 | .endif | |
844 | mov temp,z_a | |
845 | mov temp2,opl | |
f24b3c79 | 846 | lcall portWrite |
9c15f366 L |
847 | ret |
848 | ||
849 | ;---------------------------------------------------------------- | |
850 | ;|Mnemonic |SZHPNC|Description |Notes | | |
851 | ;---------------------------------------------------------------- | |
852 | ;|IN A,[n] |------|Input |A=[n] | | |
853 | ; | |
854 | ; | |
29fb1fd4 | 855 | do_op_ina: ; in a,(opl) |
9c15f366 L |
856 | .if PORT_DEBUG |
857 | printnewline | |
858 | printstring "Port read: (" | |
859 | mov temp,opl | |
29fb1fd4 | 860 | lcall printhex |
9c15f366 L |
861 | printstring ") -> " |
862 | .endif | |
863 | ||
864 | mov temp2,opl | |
f24b3c79 | 865 | lcall portRead |
29fb1fd4 | 866 | mov z_a,temp |
9c15f366 L |
867 | |
868 | .if PORT_DEBUG | |
29fb1fd4 | 869 | lcall printhex |
9c15f366 L |
870 | printstring " " |
871 | .endif | |
872 | ret | |
873 | ||
874 | ;---------------------------------------------------------------- | |
875 | ;|Mnemonic |SZHPNC|Description |Notes | | |
876 | ;---------------------------------------------------------------- | |
877 | ;|INC r |***V0-|Increment |r=r+1 | | |
878 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
879 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
880 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
881 | ;|INC r |**-P0-|Increment |r=r+1 | | |
882 | ;|INC [HL] |**-P0-|Increment |[HL]=[HL]+1 | | |
883 | ; | |
884 | ; | |
885 | do_op_inc: | |
f24b3c79 L |
886 | ldi temp,1 |
887 | add opl,temp | |
9c15f366 | 888 | in temp, sreg |
f24b3c79 | 889 | andi z_flags,(1<<ZFL_C) ; preserve C-flag |
9c15f366 L |
890 | ldpmx temp2, sz53p_tab, opl |
891 | or z_flags,temp2 ; | |
f24b3c79 L |
892 | bmov z_flags, ZFL_H, temp, AVR_H |
893 | do_z80_flags_V | |
9c15f366 L |
894 | ret |
895 | ||
896 | do_op_inca: | |
f24b3c79 L |
897 | ldi temp,1 |
898 | add z_a,temp | |
9c15f366 | 899 | in temp, sreg |
f24b3c79 | 900 | andi z_flags,(1<<ZFL_C) ; preserve C-flag |
9c15f366 L |
901 | ldpmx temp2, sz53p_tab, z_a |
902 | or z_flags,temp2 ; | |
f24b3c79 L |
903 | bmov z_flags, ZFL_H, temp, AVR_H |
904 | do_z80_flags_V | |
9c15f366 L |
905 | ret |
906 | ||
907 | ;---------------------------------------------------------------- | |
908 | ;|Mnemonic |SZHPNC|Description |Notes | | |
909 | ;---------------------------------------------------------------- | |
910 | ;|DEC r |***V1-|Decrement |s=s-1 | | |
911 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
912 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
913 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
914 | ;|DEC r |**-P -|Increment |r=r+1 | | |
915 | ;|DEC [HL] |**-P -|Increment |[HL]=[HL]+1 | | |
916 | ; | |
917 | ; | |
918 | do_op_dec: | |
f24b3c79 | 919 | subi opl,1 |
9c15f366 | 920 | in temp, sreg |
f24b3c79 | 921 | andi z_flags,(1<<ZFL_C) ; preserve C-flag |
9c15f366 L |
922 | ldpmx temp2, sz53p_tab, opl |
923 | or z_flags,temp2 ; | |
f24b3c79 L |
924 | bmov z_flags, ZFL_H, temp, AVR_H |
925 | do_z80_flags_V | |
9c15f366 L |
926 | do_z80_flags_set_N |
927 | ret | |
928 | ||
929 | do_op_deca: | |
f24b3c79 L |
930 | ldi opl,1 |
931 | sub z_a,opl | |
9c15f366 | 932 | in temp, sreg |
f24b3c79 | 933 | andi z_flags,(1<<ZFL_C) ; preserve C-flag |
9c15f366 L |
934 | ldpmx temp2, sz53p_tab, z_a |
935 | or z_flags,temp2 ; | |
f24b3c79 L |
936 | bmov z_flags, ZFL_H, temp, AVR_H |
937 | do_z80_flags_V | |
9c15f366 L |
938 | do_z80_flags_set_N |
939 | ret | |
940 | ||
941 | ;---------------------------------------------------------------- | |
942 | ;|Mnemonic |SZHPNC|Description |Notes | | |
943 | ;---------------------------------------------------------------- | |
944 | ;|INC xx |------|Increment |xx=xx+1 | | |
945 | ;|INC ss |------|Increment |ss=ss+1 | | |
946 | ; | |
947 | ; | |
948 | do_op_inc16: | |
949 | subi opl,low(-1) | |
950 | sbci oph,high(-1) | |
951 | ret | |
952 | ||
953 | ;---------------------------------------------------------------- | |
954 | ;|Mnemonic |SZHPNC|Description |Notes | | |
955 | ;---------------------------------------------------------------- | |
956 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
957 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
958 | ; | |
959 | ; | |
960 | do_op_dec16: | |
961 | subi opl, 1 | |
962 | sbci oph, 0 | |
963 | ret | |
964 | ||
965 | ;---------------------------------------------------------------- | |
966 | ;|Mnemonic |SZHPNC|Description |Notes | | |
967 | ;---------------------------------------------------------------- | |
968 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
969 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
970 | ;|RLCA |---- *|Rotate Left Circular |A=A<- | | |
971 | ; | |
972 | ; | |
f24b3c79 | 973 | do_op_rlca: |
9c15f366 L |
974 | ;Rotate Left Cyclical. All bits move 1 to the |
975 | ;left, the msb becomes c and lsb. | |
976 | do_z80_flags_op_rotate | |
f24b3c79 | 977 | lsl z_a |
9c15f366 | 978 | brcc do_op_rlc_noc |
f24b3c79 L |
979 | ldi temp,1 |
980 | or z_a,temp | |
9c15f366 L |
981 | ori z_flags, (1<<ZFL_C) |
982 | do_op_rlc_noc: | |
983 | ret | |
984 | ||
985 | ;---------------------------------------------------------------- | |
986 | ;|Mnemonic |SZHPNC|Description |Notes | | |
987 | ;---------------------------------------------------------------- | |
988 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
989 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
990 | ;|RRCA |---- *|Rotate Right Circular|A=->A | | |
991 | ; | |
992 | ; | |
f24b3c79 | 993 | do_op_rrca: |
9c15f366 L |
994 | ;Rotate Right Cyclical. All bits move 1 to the |
995 | ;right, the lsb becomes c and msb. | |
996 | do_z80_flags_op_rotate | |
f24b3c79 | 997 | lsr z_a |
9c15f366 | 998 | brcc do_op_rrc_noc |
f24b3c79 L |
999 | ldi temp,0x80 |
1000 | or z_a,temp | |
9c15f366 L |
1001 | ori z_flags, (1<<ZFL_C) |
1002 | do_op_rrc_noc: | |
1003 | ret | |
1004 | ||
1005 | ;---------------------------------------------------------------- | |
1006 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1007 | ;---------------------------------------------------------------- | |
1008 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
1009 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1010 | ;|RRA |---- *|Rotate Right Acc. |A=->{CY,A} | | |
1011 | ; | |
1012 | ; | |
f24b3c79 | 1013 | do_op_rra: |
9c15f366 L |
1014 | ;Rotate Right. All bits move 1 to the right, the lsb |
1015 | ;becomes c, c becomes msb. | |
1016 | clc ; get z80 carry to avr carry | |
1017 | sbrc z_flags,ZFL_C | |
1018 | sec | |
1019 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
f24b3c79 L |
1020 | bmov z_flags,ZFL_C, z_a,0 ; Bit 0 --> CY |
1021 | ror z_a | |
9c15f366 L |
1022 | ret |
1023 | ||
1024 | ;---------------------------------------------------------------- | |
1025 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1026 | ;---------------------------------------------------------------- | |
1027 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
1028 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1029 | ;|RLA |---- *|Rotate Left Acc. |A={CY,A}<- | | |
1030 | ; | |
1031 | ; | |
f24b3c79 | 1032 | do_op_rla: |
9c15f366 L |
1033 | ;Rotate Left. All bits move 1 to the left, the msb |
1034 | ;becomes c, c becomes lsb. | |
1035 | clc | |
1036 | sbrc z_flags,ZFL_C | |
1037 | sec | |
1038 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
f24b3c79 L |
1039 | bmov z_flags,ZFL_C, z_a,7 ; Bit 7 --> CY |
1040 | rol z_a | |
9c15f366 L |
1041 | ret |
1042 | ||
1043 | ;---------------------------------------------------------------- | |
1044 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1045 | ;---------------------------------------------------------------- | |
1046 | ;|ADD A,s |***V0*|Add |A=A+s | | |
1047 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1048 | ;|ADD A,s |***P *|Add |A=A+s | | |
1049 | ; | |
1050 | ; | |
1051 | do_op_adda: | |
1052 | add z_a,opl | |
1053 | in temp,sreg | |
1054 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P flag | |
1055 | bmov z_flags,ZFL_C, temp,AVR_C | |
f24b3c79 L |
1056 | bmov z_flags,ZFL_H, temp,AVR_H |
1057 | do_z80_flags_V | |
9c15f366 L |
1058 | ret |
1059 | ||
1060 | ;---------------------------------------------------------------- | |
1061 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1062 | ;---------------------------------------------------------------- | |
1063 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
1064 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1065 | ;|ADC A,s |***P *|Add with Carry |A=A+s+CY | | |
1066 | ; | |
1067 | ; | |
1068 | do_op_adca: | |
1069 | clc | |
1070 | sbrc z_flags,ZFL_C | |
1071 | sec | |
1072 | adc z_a,opl | |
1073 | in temp,sreg | |
1074 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
1075 | bmov z_flags,ZFL_C, temp,AVR_C | |
f24b3c79 L |
1076 | bmov z_flags,ZFL_H, temp,AVR_H |
1077 | do_z80_flags_V | |
9c15f366 L |
1078 | ret |
1079 | ||
1080 | ;---------------------------------------------------------------- | |
1081 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1082 | ;---------------------------------------------------------------- | |
1083 | ;|SUB s |***V1*|Subtract |A=A-s | | |
1084 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1085 | ;|SUB s |***P *|Subtract |A=A-s | | |
1086 | ||
1087 | ; | |
1088 | do_op_subfa: | |
1089 | sub z_a,opl | |
1090 | in temp,sreg | |
1091 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
1092 | bmov z_flags,ZFL_C, temp,AVR_C | |
f24b3c79 L |
1093 | bmov z_flags,ZFL_H, temp,AVR_H |
1094 | do_z80_flags_V | |
9c15f366 L |
1095 | do_z80_flags_set_N |
1096 | ret | |
1097 | ||
1098 | ;---------------------------------------------------------------- | |
1099 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1100 | ;---------------------------------------------------------------- | |
1101 | ;|CP s |***V1*|Compare |A-s | | |
1102 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1103 | ;|CP s |***P *|Compare |A-s | | |
1104 | ||
1105 | ; | |
1106 | do_op_cpfa: | |
f24b3c79 L |
1107 | mov temp2,z_a |
1108 | sub temp2,opl | |
9c15f366 | 1109 | in temp,sreg |
f24b3c79 | 1110 | ldpmx z_flags,sz53p_tab,temp2 ;S,Z,P |
9c15f366 | 1111 | bmov z_flags,ZFL_C, temp,AVR_C |
f24b3c79 L |
1112 | bmov z_flags,ZFL_H, temp,AVR_H |
1113 | do_z80_flags_V | |
9c15f366 L |
1114 | do_z80_flags_set_N |
1115 | ret | |
1116 | ||
1117 | ;---------------------------------------------------------------- | |
1118 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1119 | ;---------------------------------------------------------------- | |
1120 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
1121 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1122 | ;|SBC A,s |***P *|Subtract with Carry |A=A-s-CY | | |
1123 | ; | |
1124 | ; | |
1125 | do_op_sbcfa: | |
1126 | clc | |
1127 | sbrc z_flags,ZFL_C | |
1128 | sec | |
1129 | sbc z_a,opl | |
1130 | in temp,sreg | |
1131 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
1132 | bmov z_flags,ZFL_C, temp,AVR_C | |
f24b3c79 L |
1133 | bmov z_flags,ZFL_H, temp,AVR_H |
1134 | do_z80_flags_V | |
9c15f366 L |
1135 | do_z80_flags_set_N |
1136 | ret | |
1137 | ||
1138 | ;---------------------------------------------------------------- | |
1139 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1140 | ;---------------------------------------------------------------- | |
1141 | ;|AND s |**1P00|Logical AND |A=A&s | | |
1142 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1143 | ;|AND s |**-P 0|Logical AND |A=A&s | | |
1144 | ; | |
f24b3c79 | 1145 | ; |
9c15f366 L |
1146 | do_op_anda: |
1147 | and z_a,opl ; | |
1148 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P,N,C | |
1149 | do_z80_flags_op_and | |
1150 | ret | |
1151 | ||
1152 | ||
1153 | ;---------------------------------------------------------------- | |
1154 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1155 | ;---------------------------------------------------------------- | |
1156 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
1157 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1158 | ;|OR s |**-P00|Logical inclusive OR |A=Avs | | |
1159 | ; | |
f24b3c79 | 1160 | ; |
9c15f366 L |
1161 | do_op_ora: |
1162 | or z_a,opl | |
1163 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
1164 | do_z80_flags_op_or | |
1165 | ret | |
1166 | ||
1167 | ;---------------------------------------------------------------- | |
1168 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1169 | ;---------------------------------------------------------------- | |
1170 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
1171 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1172 | ;|XOR s |**-P 0|Logical Exclusive OR |A=Axs | | |
1173 | ; | |
f24b3c79 | 1174 | ; |
9c15f366 L |
1175 | do_op_xora: |
1176 | eor z_a,opl | |
1177 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
1178 | do_z80_flags_op_or | |
1179 | ret | |
1180 | ||
1181 | ;---------------------------------------------------------------- | |
1182 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1183 | ;---------------------------------------------------------------- | |
1184 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
1185 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1186 | ;|ADD HL,ss |---- *|Add |HL=HL+ss | | |
1187 | ; | |
1188 | ; | |
1189 | do_op_addhl: | |
1190 | lds temp,z_l | |
1191 | lds temp2,z_h | |
1192 | add opl,temp | |
1193 | adc oph,temp2 | |
29fb1fd4 L |
1194 | sts z_l,opl |
1195 | sts z_h,oph | |
9c15f366 | 1196 | in temp,sreg |
9c15f366 | 1197 | bmov z_flags,ZFL_C, temp,AVR_C |
29fb1fd4 | 1198 | do_z80_flags_H |
9c15f366 L |
1199 | do_z80_flags_clear_N |
1200 | ret | |
1201 | ||
1202 | ;---------------------------------------------------------------- | |
1203 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1204 | ;---------------------------------------------------------------- | |
1205 | ;|LD dst,src|------|Load |dst=src | | |
1206 | ; | |
1207 | ; | |
1208 | do_op_sthl: ;store hl to mem loc in opl:h | |
1209 | movw xl,opl | |
1210 | lds temp,z_l | |
1211 | mem_write | |
1212 | adiw xl,1 | |
1213 | lds temp,z_h | |
1214 | mem_write | |
1215 | ret | |
1216 | ||
1217 | ;---------------------------------------------------------------- | |
1218 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1219 | ;---------------------------------------------------------------- | |
1220 | ;|LD dst,src|------|Load |dst=src | | |
1221 | ; | |
1222 | ; | |
1223 | do_op_rmem16: | |
1224 | movw xl,opl | |
1225 | mem_read_d opl | |
1226 | adiw x,1 | |
1227 | mem_read_d oph | |
1228 | ret | |
1229 | ||
1230 | ;---------------------------------------------------------------- | |
1231 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1232 | ;---------------------------------------------------------------- | |
1233 | ;|LD dst,src|------|Load |dst=src | | |
1234 | ; | |
1235 | ; | |
1236 | do_op_rmem8: | |
1237 | mem_read_ds opl, op | |
1238 | ret | |
1239 | ||
1240 | ;---------------------------------------------------------------- | |
1241 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1242 | ;---------------------------------------------------------------- | |
1243 | ;|DAA |***P-*|Decimal Adjust Acc. | | | |
1244 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1245 | ; | |
1246 | ; Not yet checked | |
1247 | ||
1248 | ; Description (http://www.z80.info/z80syntx.htm#DAA): | |
1249 | ; This instruction conditionally adjusts the accumulator for BCD addition | |
1250 | ; and subtraction operations. For addition (ADD, ADC, INC) or subtraction | |
1251 | ; (SUB, SBC, DEC, NEC), the following table indicates the operation performed: | |
1252 | ; | |
f24b3c79 L |
1253 | ; ------------------------------------------------------------------- |
1254 | ; | |C Flag |HEX value in|H Flag |HEX val in | Number |C flag | | |
1255 | ; | Oper |Before |upper digit |Before |lower digit| added |After | | |
1256 | ; | |DAA |(bit 7-4) |DAA |(bit 3-0) | to A |DAA | | |
1257 | ; |-------+-------+------------+-------+-----------+--------+-------| | |
9c15f366 L |
1258 | ; | | 0 | 0-9 | 0 | 0-9 | 00 | 0 | |
1259 | ; | ADD | 0 | 0-8 | 0 | A-F | 06 | 0 | | |
1260 | ; | | 0 | 0-9 | 1 | 0-3 | 06 | 0 | | |
1261 | ; | ADC | 0 | A-F | 0 | 0-9 | 60 | 1 | | |
1262 | ; | | 0 | 9-F | 0 | A-F | 66 | 1 | | |
1263 | ; | INC | 0 | A-F | 1 | 0-3 | 66 | 1 | | |
1264 | ; | | 1 | 0-2 | 0 | 0-9 | 60 | 1 | | |
1265 | ; | | 1 | 0-2 | 0 | A-F | 66 | 1 | | |
1266 | ; | | 1 | 0-3 | 1 | 0-3 | 66 | 1 | | |
f24b3c79 | 1267 | ; |-------+-------+------------+-------+-----------+--------+-------| |
9c15f366 L |
1268 | ; | SUB | 0 | 0-9 | 0 | 0-9 | 00 | 0 | |
1269 | ; | SBC | 0 | 0-8 | 1 | 6-F | FA | 0 | | |
1270 | ; | DEC | 1 | 7-F | 0 | 0-9 | A0 | 1 | | |
1271 | ; | NEG | 1 | 6-F | 1 | 6-F | 9A | 1 | | |
f24b3c79 L |
1272 | ; ------------------------------------------------------------------- |
1273 | ; | |
1274 | ; The H flag is affected as follows: | |
1275 | ; | |
1276 | ; --------------------- | |
1277 | ; | N | H | low |H' | | |
1278 | ; | | |nibble | | | |
1279 | ; |---+---+-------+---| | |
1280 | ; | 0 | * | 0-9 | 0 | | |
1281 | ; | 0 | * | a-f | 1 | | |
1282 | ; | 1 | 0 | * | 0 | | |
1283 | ; | 1 | 1 | 6-f | 0 | | |
1284 | ; | 1 | 1 | 0-5 | 1 | | |
1285 | ; --------------------- | |
1286 | ; | |
1287 | ; Ohter flags: | |
9c15f366 L |
1288 | ; N: Unaffected. |
1289 | ; P/V: Set if Acc. is even parity after operation, reset otherwise. | |
9c15f366 L |
1290 | ; Z: Set if Acc. is Zero after operation, reset otherwise. |
1291 | ; S: Set if most significant bit of Acc. is 1 after operation, reset otherwise. | |
1292 | ||
f1deeee3 L |
1293 | #if 1 |
1294 | ||
1295 | do_op_da: | |
1296 | ||
1297 | #if EM_Z80 | |
1298 | sbrc z_flags,ZFL_N ;if add-op | |
1299 | rjmp op_da_sub ;then | |
1300 | #endif | |
1301 | ||
1302 | op_da_add: | |
1303 | ldi temp2,0 ; new C and H flag | |
1304 | sbrc z_flags,ZFL_H ; | | |
1305 | rjmp op_da_a01 ; if (H flag ... | |
1306 | mov temp,opl ; | | |
1307 | andi temp,0x0f ; | | |
1308 | cpi temp,0x0a ; or (lower nibble >= 0x0A)) | |
1309 | brlo op_da_a10 ; | | |
1310 | op_da_a01: ; then | |
1311 | ldi oph,0x06 ; add 6 to lower nibble | |
1312 | add opl,oph ; | |
1313 | brhc op_da_02 ; if | |
1314 | ori temp2,(1<<ZFL_H) ; set new H flag | |
1315 | op_da_02: ; | |
1316 | brcc op_da_a10 ; if | |
1317 | ori temp2,(1<<ZFL_C) ; set new H flag | |
1318 | op_da_a10: ; endif | |
1319 | sbrc z_flags,ZFL_C ; | | |
1320 | rjmp op_da_a12 ; if (C flag ... | |
1321 | cpi opl,0xA0 ; |... or upper nibble >= 0xA0) | |
1322 | brlo op_da_a13 ; | |
1323 | op_da_a12: ; | |
1324 | ldi oph,0x60 ; add 6 to lower nibble | |
1325 | add opl,oph ; | |
1326 | ori temp2,(1<<ZFL_C) ; set new C flag | |
1327 | op_da_a13: ; | |
1328 | ldpmx z_flags, sz53p_tab, opl ; get S,Z,P flag | |
1329 | or z_flags,temp2 ; merge new C and H flag | |
1330 | ret | |
1331 | ||
1332 | #if EM_Z80 | |
1333 | ||
1334 | op_da_sub: ;else (sub-op) | |
1335 | rcall do_op_inv ; TODO: ! | |
1336 | ret ;endif | |
1337 | #endif | |
1338 | ||
1339 | #else | |
9c15f366 | 1340 | |
9c15f366 | 1341 | do_op_da: |
f24b3c79 L |
1342 | ldi temp2,0 ;new C and H flag |
1343 | ldi oph,0 ;oph: what to add | |
1344 | ||
1345 | sbrc z_flags,ZFL_N ;if add-op | |
1346 | rjmp op_da_sub ;then | |
1347 | op_da_add: | |
1348 | mov temp,opl ; | | |
1349 | andi temp,0x0f ; | | |
1350 | cpi temp,0x0a ; if (lower nibble >= 0x0A) | |
1351 | brlo op_da_a10 ; | | |
1352 | ori oph,0x06 ; add 6 | |
1353 | ori temp2,(1<<ZFL_H) ; set new H flag | |
1354 | ||
1355 | sbrc z_flags,ZFL_C ; | | |
1356 | rjmp op_da_a02 ; if (C flag ... | |
1357 | cpi opl,0x90 ; |... or upper nibble >= 0x90) | |
1358 | brlo op_da_a03 ; | | |
1359 | op_da_a02: | |
1360 | ori oph,0x60 ; add 0x60 | |
1361 | ori temp2,(1<<ZFL_C) ; set new C flag | |
1362 | op_da_a03: ; endif | |
1363 | rjmp op_da_ae | |
1364 | op_da_a10: ; else (lower nibble is 0x09 or lower) | |
1365 | sbrc z_flags,ZFL_C ; | | |
1366 | rjmp op_da_a12 ; if (C flag ... | |
1367 | cpi opl,0xA0 ; |... or upper nibble >= 0xA0) | |
1368 | brlo op_da_a13 ; | |
1369 | op_da_a12: | |
1370 | ori oph,0x60 ; add 0x60 | |
1371 | ori temp2,(1<<ZFL_C) ; set new C flag | |
1372 | op_da_a13: | |
1373 | sbrs z_flags,ZFL_H ; if (H flag) | |
1374 | rjmp op_da_ae ; | | |
1375 | ori oph,0x06 ; add 0x06 | |
1376 | mov temp,opl ; | | |
1377 | andi temp,0x0f ; | | |
1378 | cpi temp,0x06 ; if (lower nibble >= 0x0A) | |
1379 | brsh op_da_ae ; | | |
1380 | ori temp2,(1<<ZFL_H) ; set new H flag | |
1381 | ; endif | |
1382 | ; endif | |
1383 | op_da_ae: | |
9c15f366 | 1384 | add opl,oph |
f24b3c79 L |
1385 | ldpmx z_flags, sz53p_tab, opl ; get S,Z,P flag |
1386 | or z_flags,temp2 ; merge new C and H flag | |
9c15f366 L |
1387 | ret |
1388 | ||
f24b3c79 L |
1389 | op_da_sub: ;else (sub-op) |
1390 | rcall do_op_inv ; TODO: ! | |
1391 | ret ;endif | |
f1deeee3 | 1392 | #endif |
f24b3c79 | 1393 | |
9c15f366 L |
1394 | |
1395 | ;---------------------------------------------------------------- | |
1396 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1397 | ;---------------------------------------------------------------- | |
1398 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
1399 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1400 | ; | |
1401 | ; | |
1402 | do_op_scf: | |
f24b3c79 | 1403 | do_z80_flags_clear_HN |
9c15f366 L |
1404 | ori z_flags,(1<<ZFL_C) |
1405 | ret | |
1406 | ||
1407 | ;---------------------------------------------------------------- | |
1408 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1409 | ;---------------------------------------------------------------- | |
f24b3c79 | 1410 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY, HC=previous CY| |
9c15f366 | 1411 | ;|----------|SZHP C|---------- 8080 ----------------------------| |
f24b3c79 | 1412 | ;|CCF |---- 1|Set Carry Flag |CY=1 | |
9c15f366 | 1413 | ; |
9c15f366 L |
1414 | do_op_ccf: |
1415 | do_z80_flags_clear_N | |
f24b3c79 | 1416 | do_z80_flags_copy_HC |
9c15f366 L |
1417 | ldi temp,(1<<ZFL_C) |
1418 | eor z_flags,temp | |
1419 | ret | |
1420 | ||
1421 | ;---------------------------------------------------------------- | |
1422 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1423 | ;---------------------------------------------------------------- | |
1424 | ;|CPL |--1-1-|Complement |A=~A | | |
1425 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
1426 | ;|CPL |---- -|Complement |A=~A | | |
1427 | ; | |
1428 | ; | |
1429 | do_op_cpl: | |
1430 | com z_a | |
1431 | do_z80_flags_set_HN | |
1432 | ret | |
1433 | ||
1434 | ||
1435 | ;---------------------------------------------------------------- | |
1436 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1437 | ;---------------------------------------------------------------- | |
1438 | ;|PUSH xx |------|Push |-[SP]=xx | | |
1439 | ;|PUSH qq |------|Push |-[SP]=qq | | |
1440 | ; | |
1441 | ; | |
1442 | do_op_push16: | |
1443 | movw xl,z_spl | |
1444 | sbiw x,1 | |
1445 | mem_write_s oph | |
1446 | sbiw x,1 | |
1447 | mem_write_s opl | |
1448 | movw z_spl,xl | |
1449 | ||
1450 | .if STACK_DBG | |
1451 | printnewline | |
1452 | printstring "Stack push " | |
1453 | movw temp,opl | |
1454 | rcall printhexw | |
1455 | printstring ", SP is now " | |
1456 | movw temp,z_spl | |
1457 | rcall printhexw | |
1458 | printstring ". " | |
1459 | .endif | |
1460 | ||
1461 | ret | |
1462 | ||
1463 | ;---------------------------------------------------------------- | |
1464 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1465 | ;---------------------------------------------------------------- | |
1466 | ;|POP xx |------|Pop |xx=[SP]+ | | |
1467 | ;|POP qq |------|Pop |qq=[SP]+ | | |
1468 | ; | |
1469 | ; | |
1470 | do_op_pop16: | |
1471 | movw x,z_spl | |
1472 | mem_read_d opl | |
1473 | adiw x,1 | |
1474 | mem_read_d oph | |
1475 | adiw x,1 | |
1476 | movw z_spl,x | |
1477 | ||
1478 | .if STACK_DBG | |
1479 | printnewline | |
1480 | printstring "Stack pop " | |
1481 | movw temp,opl | |
1482 | rcall printhexw | |
1483 | printstring ", SP is now " | |
1484 | movw temp,z_spl | |
1485 | rcall printhexw | |
1486 | printstring ". " | |
1487 | .endif | |
1488 | ret | |
1489 | ||
1490 | ;---------------------------------------------------------------- | |
1491 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1492 | ;---------------------------------------------------------------- | |
1493 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
1494 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
1495 | ;-----------------------------Z80-------------------------------- | |
1496 | ; | |
1497 | do_op_exhl: | |
1498 | lds temp,z_l | |
1499 | lds temp2,z_h | |
1500 | sts z_l,opl | |
1501 | sts z_h,oph | |
1502 | movw opl,temp | |
1503 | ret | |
1504 | ||
1505 | ;---------------------------------------------------------------- | |
1506 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1507 | ;---------------------------------------------------------------- | |
1508 | ; | |
1509 | ; TODO: Implement IFF1, IFF2 | |
1510 | do_op_di: | |
1511 | ret | |
1512 | ||
1513 | ;---------------------------------------------------------------- | |
1514 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1515 | ;---------------------------------------------------------------- | |
1516 | ; | |
1517 | ; TODO: Implement IFF1, IFF2 | |
1518 | do_op_ei: | |
1519 | ret | |
1520 | ||
1521 | ;---------------------------------------------------------------- | |
1522 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1523 | ;---------------------------------------------------------------- | |
1524 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1525 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1526 | ;|RET cc |------|Conditional Return |If cc RET | | |
1527 | ; | |
1528 | ; | |
1529 | do_op_ifnz: | |
1530 | sbrs z_flags, ZFL_Z | |
1531 | ret | |
1532 | pop temp ; nix tun | |
29fb1fd4 | 1533 | pop temp ; direkt zurueck zu main |
9c15f366 L |
1534 | ret |
1535 | ||
1536 | ;---------------------------------------------------------------- | |
1537 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1538 | ;---------------------------------------------------------------- | |
1539 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1540 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1541 | ;|RET cc |------|Conditional Return |If cc RET | | |
1542 | ; | |
1543 | ; | |
1544 | do_op_ifz: | |
1545 | sbrc z_flags, ZFL_Z | |
1546 | ret | |
1547 | pop temp ; nix tun | |
29fb1fd4 | 1548 | pop temp ; direkt zurueck zu main |
9c15f366 L |
1549 | ret |
1550 | ||
1551 | ;---------------------------------------------------------------- | |
1552 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1553 | ;---------------------------------------------------------------- | |
1554 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1555 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1556 | ;|RET cc |------|Conditional Return |If cc RET | | |
1557 | ; | |
1558 | ; | |
1559 | do_op_ifnc: | |
1560 | sbrs z_flags, ZFL_C | |
1561 | ret | |
1562 | pop temp ; nix tun | |
1563 | pop temp ; direkt zuruech zu main | |
1564 | ret | |
1565 | ||
1566 | ;---------------------------------------------------------------- | |
1567 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1568 | ;---------------------------------------------------------------- | |
1569 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1570 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1571 | ;|RET cc |------|Conditional Return |If cc RET | | |
1572 | ; | |
1573 | ; | |
1574 | do_op_ifc: | |
1575 | sbrc z_flags, ZFL_C | |
1576 | ret | |
1577 | pop temp ; nix tun | |
1578 | pop temp ; direkt zuruech zu main | |
1579 | ret | |
1580 | ||
1581 | ;---------------------------------------------------------------- | |
1582 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1583 | ;---------------------------------------------------------------- | |
1584 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1585 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1586 | ;|RET cc |------|Conditional Return |If cc RET | | |
1587 | ; | |
1588 | ; | |
1589 | do_op_ifpo: | |
1590 | sbrs z_flags, ZFL_P | |
1591 | ret | |
1592 | pop temp ; nix tun | |
1593 | pop temp ; direkt zuruech zu main | |
1594 | ret | |
1595 | ||
1596 | ;---------------------------------------------------------------- | |
1597 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1598 | ;---------------------------------------------------------------- | |
1599 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1600 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1601 | ;|RET cc |------|Conditional Return |If cc RET | | |
1602 | ; | |
1603 | ; | |
1604 | do_op_ifpe: | |
1605 | sbrc z_flags, ZFL_P | |
1606 | ret | |
1607 | pop temp ; nix tun | |
1608 | pop temp ; direkt zuruech zu main | |
1609 | ret | |
1610 | ||
1611 | ;---------------------------------------------------------------- | |
1612 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1613 | ;---------------------------------------------------------------- | |
1614 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1615 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1616 | ;|RET cc |------|Conditional Return |If cc RET | | |
1617 | ; | |
1618 | ; | |
1619 | do_op_ifp: ;sign positive, aka s=0 | |
1620 | sbrs z_flags, ZFL_S | |
1621 | ret | |
1622 | pop temp ; nix tun | |
1623 | pop temp ; direkt zuruech zu main | |
1624 | ret | |
1625 | ||
1626 | ;---------------------------------------------------------------- | |
1627 | ;|Mnemonic |SZHPNC|Description |Notes | | |
1628 | ;---------------------------------------------------------------- | |
1629 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
1630 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
1631 | ;|RET cc |------|Conditional Return |If cc RET | | |
1632 | ; | |
1633 | ; | |
1634 | do_op_ifm: ;sign negative, aka s=1 | |
1635 | sbrc z_flags, ZFL_S | |
1636 | ret | |
1637 | pop temp ; nix tun | |
1638 | pop temp ; direkt zuruech zu main | |
1639 | ret | |
1640 | ||
1641 | ||
1642 | ; ----------------------- Opcode decoding ------------------------- | |
1643 | ||
1644 | ; Lookup table for Z80 opcodes. Translates the first byte of the instruction word into three | |
1645 | ; operations: fetch, do something, store. | |
1646 | ; The table is made of 256 words. | |
1647 | ||
1648 | ;.org (PC+255) & 0xff00 | |
1649 | todo_table: | |
1650 | instr do_fetch_nop, op_nop, do_store_nop ;00 ;NOP | |
1651 | instr do_fetch_DIR16, op_nop, do_store_BC ;01 nn nn ;LD BC,nn | |
f24b3c79 | 1652 | instr do_fetch_nop, op_nop, do_store_MBC ;02 ;LD (BC),A |
9c15f366 L |
1653 | instr do_fetch_BC, op_INC16, do_store_BC ;03 ;INC BC |
1654 | instr do_fetch_B, op_INC, do_store_B ;04 ;INC B | |
1655 | instr do_fetch_B, op_DEC, do_store_B ;05 ;DEC B | |
1656 | instr do_fetch_DIR8, op_nop, do_store_B ;06 ;LD B,n | |
f24b3c79 | 1657 | instr do_fetch_nop, op_RLCA, do_store_nop ;07 ;RLCA |
9c15f366 | 1658 | instr do_fetch_nop, op_INV, do_store_nop ;08 ;EX AF,AF' |
29fb1fd4 | 1659 | instr do_fetch_BC, op_ADDHL, do_store_nop ;09 ;ADD HL,BC |
f24b3c79 | 1660 | instr do_fetch_MBC, op_nop, do_store_nop ;0A ;LD A,(BC) |
9c15f366 L |
1661 | instr do_fetch_BC, op_DEC16, do_store_BC ;0B ;DEC BC |
1662 | instr do_fetch_C, op_INC, do_store_C ;0C ;INC C | |
1663 | instr do_fetch_C, op_DEC, do_store_C ;0D ;DEC C | |
1664 | instr do_fetch_DIR8, op_nop, do_store_C ;0E nn ;LD C,n | |
f24b3c79 | 1665 | instr do_fetch_nop, op_RRCA, do_store_nop ;0F ;RRCA |
9c15f366 L |
1666 | instr do_fetch_nop, op_INV, do_store_nop ;10 oo ;DJNZ o |
1667 | instr do_fetch_DIR16, op_nop, do_store_DE ;11 nn nn ;LD DE,nn | |
f24b3c79 | 1668 | instr do_fetch_nop, op_nop, do_store_MDE ;12 ;LD (DE),A |
9c15f366 L |
1669 | instr do_fetch_DE, op_INC16, do_store_DE ;13 ;INC DE |
1670 | instr do_fetch_D, op_INC, do_store_D ;14 ;INC D | |
1671 | instr do_fetch_D, op_DEC, do_store_D ;15 ;DEC D | |
1672 | instr do_fetch_DIR8, op_nop, do_store_D ;16 nn ;LD D,n | |
f24b3c79 | 1673 | instr do_fetch_nop, op_RLA, do_store_nop ;17 ;RLA |
9c15f366 | 1674 | instr do_fetch_nop, op_INV, do_store_nop ;18 oo ;JR o |
29fb1fd4 | 1675 | instr do_fetch_DE, op_ADDHL, do_store_nop ;19 ;ADD HL,DE |
f24b3c79 | 1676 | instr do_fetch_MDE, op_nop, do_store_nop ;1A ;LD A,(DE) |
9c15f366 L |
1677 | instr do_fetch_DE, op_DEC16, do_store_DE ;1B ;DEC DE |
1678 | instr do_fetch_E, op_INC, do_store_E ;1C ;INC E | |
1679 | instr do_fetch_E, op_DEC, do_store_E ;1D ;DEC E | |
1680 | instr do_fetch_DIR8, op_nop, do_store_E ;1E nn ;LD E,n | |
f24b3c79 | 1681 | instr do_fetch_nop, op_RRA, do_store_nop ;1F ;RRA |
9c15f366 L |
1682 | instr do_fetch_nop, op_INV, do_store_nop ;20 oo ;JR NZ,o |
1683 | instr do_fetch_DIR16, op_nop, do_store_HL ;21 nn nn ;LD HL,nn | |
1684 | instr do_fetch_DIR16, op_STHL, do_store_nop ;22 nn nn ;LD (nn),HL | |
1685 | instr do_fetch_HL, op_INC16, do_store_HL ;23 ;INC HL | |
1686 | instr do_fetch_H, op_INC, do_store_H ;24 ;INC H | |
1687 | instr do_fetch_H, op_DEC, do_store_H ;25 ;DEC H | |
1688 | instr do_fetch_DIR8, op_nop, do_store_H ;26 nn ;LD H,n | |
1689 | instr do_fetch_A, op_DA, do_store_A ;27 ;DAA | |
1690 | instr do_fetch_nop, op_INV, do_store_nop ;28 oo ;JR Z,o | |
29fb1fd4 | 1691 | instr do_fetch_HL, op_ADDHL, do_store_nop ;29 ;ADD HL,HL |
9c15f366 L |
1692 | instr do_fetch_DIR16, op_RMEM16, do_store_HL ;2A nn nn ;LD HL,(nn) |
1693 | instr do_fetch_HL, op_DEC16, do_store_HL ;2B ;DEC HL | |
1694 | instr do_fetch_L, op_INC, do_store_L ;2C ;INC L | |
1695 | instr do_fetch_L, op_DEC, do_store_L ;2D ;DEC L | |
1696 | instr do_fetch_DIR8, op_nop, do_store_L ;2E nn ;LD L,n | |
1697 | instr do_fetch_nop, op_CPL, do_store_nop ;2F ;CPL | |
1698 | instr do_fetch_nop, op_INV, do_store_nop ;30 oo ;JR NC,o | |
1699 | instr do_fetch_DIR16, op_nop, do_store_SP ;31 nn nn ;LD SP,nn | |
1700 | instr do_fetch_DIR16, op_nop, do_store_AM ;32 nn nn ;LD (nn),A | |
1701 | instr do_fetch_SP, op_INC16, do_store_SP ;33 ;INC SP | |
1702 | instr do_fetch_MHL, op_INC, do_store_MHL ;34 ;INC (HL) | |
1703 | instr do_fetch_MHL, op_DEC, do_store_MHL ;35 ;DEC (HL) | |
1704 | instr do_fetch_DIR8, op_nop, do_store_MHL ;36 nn ;LD (HL),n | |
1705 | instr do_fetch_nop, op_SCF, do_store_nop ;37 ;SCF | |
1706 | instr do_fetch_nop, op_INV, do_store_nop ;38 oo ;JR C,o | |
29fb1fd4 | 1707 | instr do_fetch_SP, op_ADDHL, do_store_nop ;39 ;ADD HL,SP |
9c15f366 L |
1708 | instr do_fetch_DIR16, op_RMEM8, do_store_A ;3A nn nn ;LD A,(nn) |
1709 | instr do_fetch_SP, op_DEC16, do_store_SP ;3B ;DEC SP | |
1710 | instr do_fetch_nop, op_INCA, do_store_nop ;3C ;INC A | |
1711 | instr do_fetch_nop, op_DECA, do_store_nop ;3D ;DEC A | |
1712 | instr do_fetch_DIR8, op_nop, do_store_A ;3E nn ;LD A,n | |
1713 | instr do_fetch_nop, op_CCF, do_store_nop ;3F ;CCF (Complement Carry Flag, gvd) | |
f24b3c79 | 1714 | instr do_fetch_nop, op_nop, do_store_nop ;40 ;LD B,B |
9c15f366 L |
1715 | instr do_fetch_C, op_nop, do_store_B ;41 ;LD B,C |
1716 | instr do_fetch_D, op_nop, do_store_B ;42 ;LD B,D | |
1717 | instr do_fetch_E, op_nop, do_store_B ;43 ;LD B,E | |
1718 | instr do_fetch_H, op_nop, do_store_B ;44 ;LD B,H | |
1719 | instr do_fetch_L, op_nop, do_store_B ;45 ;LD B,L | |
1720 | instr do_fetch_MHL, op_nop, do_store_B ;46 ;LD B,(HL) | |
1721 | instr do_fetch_A, op_nop, do_store_B ;47 ;LD B,A | |
1722 | instr do_fetch_B, op_nop, do_store_C ;48 ;LD C,B | |
f24b3c79 | 1723 | instr do_fetch_nop, op_nop, do_store_nop ;49 ;LD C,C |
9c15f366 L |
1724 | instr do_fetch_D, op_nop, do_store_C ;4A ;LD C,D |
1725 | instr do_fetch_E, op_nop, do_store_C ;4B ;LD C,E | |
1726 | instr do_fetch_H, op_nop, do_store_C ;4C ;LD C,H | |
1727 | instr do_fetch_L, op_nop, do_store_C ;4D ;LD C,L | |
1728 | instr do_fetch_MHL, op_nop, do_store_C ;4E ;LD C,(HL) | |
1729 | instr do_fetch_A, op_nop, do_store_C ;4F ;LD C,A | |
1730 | instr do_fetch_B, op_nop, do_store_D ;50 ;LD D,B | |
1731 | instr do_fetch_C, op_nop, do_store_D ;51 ;LD D,C | |
f24b3c79 | 1732 | instr do_fetch_nop, op_nop, do_store_nop ;52 ;LD D,D |
9c15f366 L |
1733 | instr do_fetch_E, op_nop, do_store_D ;53 ;LD D,E |
1734 | instr do_fetch_H, op_nop, do_store_D ;54 ;LD D,H | |
1735 | instr do_fetch_L, op_nop, do_store_D ;55 ;LD D,L | |
1736 | instr do_fetch_MHL, op_nop, do_store_D ;56 ;LD D,(HL) | |
1737 | instr do_fetch_A, op_nop, do_store_D ;57 ;LD D,A | |
1738 | instr do_fetch_B, op_nop, do_store_E ;58 ;LD E,B | |
1739 | instr do_fetch_C, op_nop, do_store_E ;59 ;LD E,C | |
1740 | instr do_fetch_D, op_nop, do_store_E ;5A ;LD E,D | |
f24b3c79 | 1741 | instr do_fetch_nop, op_nop, do_store_nop ;5B ;LD E,E |
9c15f366 L |
1742 | instr do_fetch_H, op_nop, do_store_E ;5C ;LD E,H |
1743 | instr do_fetch_L, op_nop, do_store_E ;5D ;LD E,L | |
1744 | instr do_fetch_MHL, op_nop, do_store_E ;5E ;LD E,(HL) | |
1745 | instr do_fetch_A, op_nop, do_store_E ;5F ;LD E,A | |
1746 | instr do_fetch_B, op_nop, do_store_H ;60 ;LD H,B | |
1747 | instr do_fetch_C, op_nop, do_store_H ;61 ;LD H,C | |
1748 | instr do_fetch_D, op_nop, do_store_H ;62 ;LD H,D | |
1749 | instr do_fetch_E, op_nop, do_store_H ;63 ;LD H,E | |
f24b3c79 | 1750 | instr do_fetch_nop, op_nop, do_store_nop ;64 ;LD H,H |
9c15f366 L |
1751 | instr do_fetch_L, op_nop, do_store_H ;65 ;LD H,L |
1752 | instr do_fetch_MHL, op_nop, do_store_H ;66 ;LD H,(HL) | |
1753 | instr do_fetch_A, op_nop, do_store_H ;67 ;LD H,A | |
1754 | instr do_fetch_B, op_nop, do_store_L ;68 ;LD L,B | |
1755 | instr do_fetch_C, op_nop, do_store_L ;69 ;LD L,C | |
1756 | instr do_fetch_D, op_nop, do_store_L ;6A ;LD L,D | |
1757 | instr do_fetch_E, op_nop, do_store_L ;6B ;LD L,E | |
1758 | instr do_fetch_H, op_nop, do_store_L ;6C ;LD L,H | |
f24b3c79 | 1759 | instr do_fetch_nop, op_nop, do_store_nop ;6D ;LD L,L |
9c15f366 L |
1760 | instr do_fetch_MHL, op_nop, do_store_L ;6E ;LD L,(HL) |
1761 | instr do_fetch_A, op_nop, do_store_L ;6F ;LD L,A | |
1762 | instr do_fetch_B, op_nop, do_store_MHL ;70 ;LD (HL),B | |
1763 | instr do_fetch_C, op_nop, do_store_MHL ;71 ;LD (HL),C | |
1764 | instr do_fetch_D, op_nop, do_store_MHL ;72 ;LD (HL),D | |
1765 | instr do_fetch_E, op_nop, do_store_MHL ;73 ;LD (HL),E | |
1766 | instr do_fetch_H, op_nop, do_store_MHL ;74 ;LD (HL),H | |
1767 | instr do_fetch_L, op_nop, do_store_MHL ;75 ;LD (HL),L | |
1768 | instr do_fetch_nop, op_INV, do_store_nop ;76 ;HALT | |
1769 | instr do_fetch_A, op_nop, do_store_MHL ;77 ;LD (HL),A | |
1770 | instr do_fetch_B, op_nop, do_store_A ;78 ;LD A,B | |
1771 | instr do_fetch_C, op_nop, do_store_A ;79 ;LD A,C | |
1772 | instr do_fetch_D, op_nop, do_store_A ;7A ;LD A,D | |
1773 | instr do_fetch_E, op_nop, do_store_A ;7B ;LD A,E | |
1774 | instr do_fetch_H, op_nop, do_store_A ;7C ;LD A,H | |
1775 | instr do_fetch_L, op_nop, do_store_A ;7D ;LD A,L | |
1776 | instr do_fetch_MHL, op_nop, do_store_A ;7E ;LD A,(HL) | |
f24b3c79 | 1777 | instr do_fetch_nop, op_nop, do_store_nop ;7F ;LD A,A |
9c15f366 L |
1778 | instr do_fetch_B, op_ADDA, do_store_nop ;80 ;ADD A,B |
1779 | instr do_fetch_C, op_ADDA, do_store_nop ;81 ;ADD A,C | |
1780 | instr do_fetch_D, op_ADDA, do_store_nop ;82 ;ADD A,D | |
1781 | instr do_fetch_E, op_ADDA, do_store_nop ;83 ;ADD A,E | |
1782 | instr do_fetch_H, op_ADDA, do_store_nop ;84 ;ADD A,H | |
1783 | instr do_fetch_L, op_ADDA, do_store_nop ;85 ;ADD A,L | |
1784 | instr do_fetch_MHL, op_ADDA, do_store_nop ;86 ;ADD A,(HL) | |
1785 | instr do_fetch_A, op_ADDA, do_store_nop ;87 ;ADD A,A | |
1786 | instr do_fetch_B, op_ADCA, do_store_nop ;88 ;ADC A,B | |
1787 | instr do_fetch_C, op_ADCA, do_store_nop ;89 ;ADC A,C | |
1788 | instr do_fetch_D, op_ADCA, do_store_nop ;8A ;ADC A,D | |
1789 | instr do_fetch_E, op_ADCA, do_store_nop ;8B ;ADC A,E | |
1790 | instr do_fetch_H, op_ADCA, do_store_nop ;8C ;ADC A,H | |
1791 | instr do_fetch_L, op_ADCA, do_store_nop ;8D ;ADC A,L | |
1792 | instr do_fetch_MHL, op_ADCA, do_store_nop ;8E ;ADC A,(HL) | |
1793 | instr do_fetch_A, op_ADCA, do_store_nop ;8F ;ADC A,A | |
1794 | instr do_fetch_B, op_SUBFA, do_store_nop ;90 ;SUB A,B | |
1795 | instr do_fetch_C, op_SUBFA, do_store_nop ;91 ;SUB A,C | |
1796 | instr do_fetch_D, op_SUBFA, do_store_nop ;92 ;SUB A,D | |
1797 | instr do_fetch_E, op_SUBFA, do_store_nop ;93 ;SUB A,E | |
1798 | instr do_fetch_H, op_SUBFA, do_store_nop ;94 ;SUB A,H | |
1799 | instr do_fetch_L, op_SUBFA, do_store_nop ;95 ;SUB A,L | |
1800 | instr do_fetch_MHL, op_SUBFA, do_store_nop ;96 ;SUB A,(HL) | |
1801 | instr do_fetch_A, op_SUBFA, do_store_nop ;97 ;SUB A,A | |
1802 | instr do_fetch_B, op_SBCFA, do_store_nop ;98 ;SBC A,B | |
1803 | instr do_fetch_C, op_SBCFA, do_store_nop ;99 ;SBC A,C | |
1804 | instr do_fetch_D, op_SBCFA, do_store_nop ;9A ;SBC A,D | |
1805 | instr do_fetch_E, op_SBCFA, do_store_nop ;9B ;SBC A,E | |
1806 | instr do_fetch_H, op_SBCFA, do_store_nop ;9C ;SBC A,H | |
1807 | instr do_fetch_L, op_SBCFA, do_store_nop ;9D ;SBC A,L | |
1808 | instr do_fetch_MHL, op_SBCFA, do_store_nop ;9E ;SBC A,(HL) | |
1809 | instr do_fetch_A, op_SBCFA, do_store_nop ;9F ;SBC A,A | |
1810 | instr do_fetch_B, op_ANDA, do_store_nop ;A0 ;AND A,B | |
1811 | instr do_fetch_C, op_ANDA, do_store_nop ;A1 ;AND A,C | |
1812 | instr do_fetch_D, op_ANDA, do_store_nop ;A2 ;AND A,D | |
1813 | instr do_fetch_E, op_ANDA, do_store_nop ;A3 ;AND A,E | |
1814 | instr do_fetch_H, op_ANDA, do_store_nop ;A4 ;AND A,H | |
1815 | instr do_fetch_L, op_ANDA, do_store_nop ;A5 ;AND A,L | |
1816 | instr do_fetch_MHL, op_ANDA, do_store_nop ;A6 ;AND A,(HL) | |
1817 | instr do_fetch_A, op_ANDA, do_store_nop ;A7 ;AND A,A | |
1818 | instr do_fetch_B, op_XORA, do_store_nop ;A8 ;XOR A,B | |
1819 | instr do_fetch_C, op_XORA, do_store_nop ;A9 ;XOR A,C | |
1820 | instr do_fetch_D, op_XORA, do_store_nop ;AA ;XOR A,D | |
1821 | instr do_fetch_E, op_XORA, do_store_nop ;AB ;XOR A,E | |
1822 | instr do_fetch_H, op_XORA, do_store_nop ;AC ;XOR A,H | |
1823 | instr do_fetch_L, op_XORA, do_store_nop ;AD ;XOR A,L | |
1824 | instr do_fetch_MHL, op_XORA, do_store_nop ;AE ;XOR A,(HL) | |
1825 | instr do_fetch_A, op_XORA, do_store_nop ;AF ;XOR A,A | |
1826 | instr do_fetch_B, op_ORA, do_store_nop ;B0 ;OR A,B | |
1827 | instr do_fetch_C, op_ORA, do_store_nop ;B1 ;OR A,C | |
1828 | instr do_fetch_D, op_ORA, do_store_nop ;B2 ;OR A,D | |
1829 | instr do_fetch_E, op_ORA, do_store_nop ;B3 ;OR A,E | |
1830 | instr do_fetch_H, op_ORA, do_store_nop ;B4 ;OR A,H | |
1831 | instr do_fetch_L, op_ORA, do_store_nop ;B5 ;OR A,L | |
1832 | instr do_fetch_MHL, op_ORA, do_store_nop ;B6 ;OR A,(HL) | |
1833 | instr do_fetch_A, op_ORA, do_store_nop ;B7 ;OR A,A | |
1834 | instr do_fetch_B, op_CPFA, do_store_nop ;B8 ;CP A,B | |
1835 | instr do_fetch_C, op_CPFA, do_store_nop ;B9 ;CP A,C | |
1836 | instr do_fetch_D, op_CPFA, do_store_nop ;BA ;CP A,D | |
1837 | instr do_fetch_E, op_CPFA, do_store_nop ;BB ;CP A,E | |
1838 | instr do_fetch_H, op_CPFA, do_store_nop ;BC ;CP A,H | |
1839 | instr do_fetch_L, op_CPFA, do_store_nop ;BD ;CP A,L | |
1840 | instr do_fetch_MHL, op_CPFA, do_store_nop ;BE ;CP A,(HL) | |
1841 | instr do_fetch_A, op_CPFA, do_store_nop ;BF ;CP A,A | |
1842 | instr do_fetch_nop, op_IFNZ, do_store_RET ;C0 ;RET NZ | |
1843 | instr do_fetch_nop, op_POP16, do_store_BC ;C1 ;POP BC | |
1844 | instr do_fetch_DIR16, op_IFNZ, do_store_PC ;C2 nn nn ;JP NZ,nn | |
1845 | instr do_fetch_DIR16, op_nop, do_store_PC ;C3 nn nn ;JP nn | |
1846 | instr do_fetch_DIR16, op_IFNZ, do_store_CALL ;C4 nn nn ;CALL NZ,nn | |
1847 | instr do_fetch_BC, op_PUSH16, do_store_nop ;C5 ;PUSH BC | |
1848 | instr do_fetch_DIR8, op_ADDA, do_store_nop ;C6 nn ;ADD A,n | |
1849 | instr do_fetch_RST, op_nop, do_store_CALL ;C7 ;RST 0 | |
1850 | instr do_fetch_nop, op_IFZ, do_store_RET ;C8 ;RET Z | |
1851 | instr do_fetch_nop, op_nop, do_store_RET ;C9 ;RET | |
1852 | instr do_fetch_DIR16, op_IFZ, do_store_PC ;CA nn nn ;JP Z,nn | |
1853 | instr do_fetch_nop, op_INV, do_store_nop ;CB ;(Z80 specific) | |
1854 | instr do_fetch_DIR16, op_IFZ, do_store_CALL ;CC nn nn ;CALL Z,nn | |
1855 | instr do_fetch_DIR16, op_nop, do_store_CALL ;CD nn nn ;CALL nn | |
1856 | instr do_fetch_DIR8, op_ADCA, do_store_nop ;CE nn ;ADC A,n | |
1857 | instr do_fetch_RST, op_nop, do_store_CALL ;CF ;RST 8H | |
1858 | instr do_fetch_nop, op_IFNC, do_store_RET ;D0 ;RET NC | |
1859 | instr do_fetch_nop, op_POP16, do_store_DE ;D1 ;POP DE | |
1860 | instr do_fetch_DIR16, op_IFNC, do_store_PC ;D2 nn nn ;JP NC,nn | |
1861 | instr do_fetch_DIR8, op_OUTA, do_store_nop ;D3 nn ;OUT (n),A | |
1862 | instr do_fetch_DIR16, op_IFNC, do_store_CALL ;D4 nn nn ;CALL NC,nn | |
1863 | instr do_fetch_DE, op_PUSH16, do_store_nop ;D5 ;PUSH DE | |
1864 | instr do_fetch_DIR8, op_SUBFA, do_store_nop ;D6 nn ;SUB n | |
1865 | instr do_fetch_RST, op_nop, do_store_CALL ;D7 ;RST 10H | |
1866 | instr do_fetch_nop, op_IFC, do_store_RET ;D8 ;RET C | |
1867 | instr do_fetch_nop, op_nop, do_store_nop ;D9 ;EXX | |
1868 | instr do_fetch_DIR16, op_IFC, do_store_PC ;DA nn nn ;JP C,nn | |
29fb1fd4 | 1869 | instr do_fetch_DIR8, op_INA, do_store_nop ;DB nn ;IN A,(n) |
9c15f366 L |
1870 | instr do_fetch_DIR16, op_IFC, do_store_CALL ;DC nn nn ;CALL C,nn |
1871 | instr do_fetch_nop, op_INV, do_store_nop ;DD ;(Z80 specific) | |
1872 | instr do_fetch_DIR8, op_SBCFA, do_store_nop ;DE nn ;SBC A,n | |
1873 | instr do_fetch_RST, op_nop, do_store_CALL ;DF ;RST 18H | |
1874 | instr do_fetch_nop, op_IFPO, do_store_RET ;E0 ;RET PO | |
1875 | instr do_fetch_nop, op_POP16, do_store_HL ;E1 ;POP HL | |
1876 | instr do_fetch_DIR16, op_IFPO, do_store_PC ;E2 nn nn ;JP PO,nn | |
1877 | instr do_fetch_MSP, op_EXHL, do_store_MSP ;E3 ;EX (SP),HL | |
1878 | instr do_fetch_DIR16, op_IFPO, do_store_CALL ;E4 nn nn ;CALL PO,nn | |
1879 | instr do_fetch_HL, op_PUSH16, do_store_nop ;E5 ;PUSH HL | |
1880 | instr do_fetch_DIR8, op_ANDA, do_store_nop ;E6 nn ;AND n | |
1881 | instr do_fetch_RST, op_nop, do_store_CALL ;E7 ;RST 20H | |
1882 | instr do_fetch_nop, op_IFPE, do_store_RET ;E8 ;RET PE | |
1883 | instr do_fetch_HL, op_nop, do_store_PC ;E9 ;JP HL | |
1884 | instr do_fetch_DIR16, op_IFPE, do_store_PC ;EA nn nn ;JP PE,nn | |
1885 | instr do_fetch_DE, op_EXHL, do_store_DE ;EB ;EX DE,HL | |
1886 | instr do_fetch_DIR16, op_IFPE, do_store_CALL ;EC nn nn ;CALL PE,nn | |
1887 | instr do_fetch_nop, op_INV, do_store_nop ;ED ;(Z80 specific) | |
1888 | instr do_fetch_DIR8, op_XORA, do_store_nop ;EE nn ;XOR n | |
1889 | instr do_fetch_RST, op_nop, do_store_CALL ;EF ;RST 28H | |
1890 | instr do_fetch_nop, op_IFP, do_store_RET ;F0 ;RET P | |
1891 | instr do_fetch_nop, op_POP16, do_store_AF ;F1 ;POP AF | |
1892 | instr do_fetch_DIR16, op_IFP, do_store_PC ;F2 nn nn ;JP P,nn | |
1893 | instr do_fetch_nop, op_DI, do_store_nop ;F3 ;DI | |
1894 | instr do_fetch_DIR16, op_IFP, do_store_CALL ;F4 nn nn ;CALL P,nn | |
1895 | instr do_fetch_AF, op_PUSH16, do_store_nop ;F5 ;PUSH AF | |
1896 | instr do_fetch_DIR8, op_ORA, do_store_nop ;F6 nn ;OR n | |
1897 | instr do_fetch_RST, op_nop, do_store_CALL ;F7 ;RST 30H | |
1898 | instr do_fetch_nop, op_IFM, do_store_RET ;F8 ;RET M | |
1899 | instr do_fetch_HL, op_nop, do_store_SP ;F9 ;LD SP,HL | |
1900 | instr do_fetch_DIR16, op_IFM, do_store_PC ;FA nn nn ;JP M,nn | |
1901 | instr do_fetch_nop, op_EI, do_store_nop ;FB ;EI | |
1902 | instr do_fetch_DIR16, op_IFM, do_store_CALL ;FC nn nn ;CALL M,nn | |
1903 | instr do_fetch_nop, op_INV, do_store_nop ;FD ;(Z80 specific) | |
1904 | instr do_fetch_DIR8, op_CPFA, do_store_nop ;FE nn ;CP n | |
1905 | instr do_fetch_RST, op_nop, do_store_CALL ;FF ;RST 38H | |
1906 | ||
f24b3c79 | 1907 | |
9c15f366 L |
1908 | ;---------------------------------------------------------------- |
1909 | ; Lookup table, stolen from z80ex, Z80 emulation library. | |
1910 | ; http://z80ex.sourceforge.net/ | |
1911 | ||
1912 | ; The S, Z, 5 and 3 bits and the parity of the lookup value | |
1913 | ||
1914 | .org (PC+255) & 0xff00 | |
1915 | sz53p_tab: | |
1916 | .db 0x44,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
1917 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
1918 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
1919 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
1920 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
1921 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
1922 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
1923 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
1924 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
1925 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
1926 | .db 0x04,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
1927 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
1928 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
1929 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
1930 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
1931 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
1932 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
1933 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
1934 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
1935 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
1936 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
1937 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
1938 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
1939 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
1940 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
1941 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
1942 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
1943 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
1944 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
1945 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
1946 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
1947 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
1948 | ||
1949 | ; vim:set ts=8 noet nowrap | |
1950 |