-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathopcode_cheatsheet
657 lines (434 loc) · 20.1 KB
/
opcode_cheatsheet
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
ADC Add Memory to Accumulator with Carry
A + M + C -> A, C N Z C I D V
+ + + - - +
addressing assembler opc bytes cyles
--------------------------------------------
immidiate ADC #oper 69 2 2
zeropage ADC oper 65 2 3
zeropage,X ADC oper,X 75 2 4
absolute ADC oper 6D 3 4
absolute,X ADC oper,X 7D 3 4*
absolute,Y ADC oper,Y 79 3 4*
(indirect,X) ADC (oper,X) 61 2 6
(indirect),Y ADC (oper),Y 71 2 5*
AND AND Memory with Accumulator
A AND M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate AND #oper 29 2 2
zeropage AND oper 25 2 3
zeropage,X AND oper,X 35 2 4
absolute AND oper 2D 3 4
absolute,X AND oper,X 3D 3 4*
absolute,Y AND oper,Y 39 3 4*
(indirect,X) AND (oper,X) 21 2 6
(indirect),Y AND (oper),Y 31 2 5*
ASL Shift Left One Bit (Memory or Accumulator)
C <- [76543210] <- 0 N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator ASL A 0A 1 2
zeropage ASL oper 06 2 5
zeropage,X ASL oper,X 16 2 6
absolute ASL oper 0E 3 6
absolute,X ASL oper,X 1E 3 7
BCC Branch on Carry Clear
branch on C = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BCC oper 90 2 2**
BCS Branch on Carry Set
branch on C = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BCS oper B0 2 2**
BEQ Branch on Result Zero
branch on Z = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BEQ oper F0 2 2**
BIT Test Bits in Memory with Accumulator
bits 7 and 6 of operand are transfered to bit 7 and 6 of SR (N,V);
the zeroflag is set to the result of operand AND accumulator.
A AND M, M7 -> N, M6 -> V N Z C I D V
M7 + - - - M6
addressing assembler opc bytes cyles
--------------------------------------------
zeropage BIT oper 24 2 3
absolute BIT oper 2C 3 4
BMI Branch on Result Minus
branch on N = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BMI oper 30 2 2**
BNE Branch on Result not Zero
branch on Z = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BNE oper D0 2 2**
BPL Branch on Result Plus
branch on N = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BPL oper 10 2 2**
BRK Force Break
interrupt, N Z C I D V
push PC+2, push SR - - - 1 - -
addressing assembler opc bytes cyles
--------------------------------------------
implied BRK 00 1 7
BVC Branch on Overflow Clear
branch on V = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BVC oper 50 2 2**
BVS Branch on Overflow Set
branch on V = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BVC oper 70 2 2**
CLC Clear Carry Flag
0 -> C N Z C I D V
- - 0 - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied CLC 18 1 2
CLD Clear Decimal Mode
0 -> D N Z C I D V
- - - - 0 -
addressing assembler opc bytes cyles
--------------------------------------------
implied CLD D8 1 2
CLI Clear Interrupt Disable Bit
0 -> I N Z C I D V
- - - 0 - -
addressing assembler opc bytes cyles
--------------------------------------------
implied CLI 58 1 2
CLV Clear Overflow Flag
0 -> V N Z C I D V
- - - - - 0
addressing assembler opc bytes cyles
--------------------------------------------
implied CLV B8 1 2
CMP Compare Memory with Accumulator
A - M N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate CMP #oper C9 2 2
zeropage CMP oper C5 2 3
zeropage,X CMP oper,X D5 2 4
absolute CMP oper CD 3 4
absolute,X CMP oper,X DD 3 4*
absolute,Y CMP oper,Y D9 3 4*
(indirect,X) CMP (oper,X) C1 2 6
(indirect),Y CMP (oper),Y D1 2 5*
CPX Compare Memory and Index X
X - M N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate CPX #oper E0 2 2
zeropage CPX oper E4 2 3
absolute CPX oper EC 3 4
CPY Compare Memory and Index Y
Y - M N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate CPY #oper C0 2 2
zeropage CPY oper C4 2 3
absolute CPY oper CC 3 4
DEC Decrement Memory by One
M - 1 -> M N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage DEC oper C6 2 5
zeropage,X DEC oper,X D6 2 6
absolute DEC oper CE 3 3
absolute,X DEC oper,X DE 3 7
DEX Decrement Index X by One
X - 1 -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied DEC CA 1 2
DEY Decrement Index Y by One
Y - 1 -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied DEC 88 1 2
EOR Exclusive-OR Memory with Accumulator
A EOR M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate EOR #oper 49 2 2
zeropage EOR oper 45 2 3
zeropage,X EOR oper,X 55 2 4
absolute EOR oper 4D 3 4
absolute,X EOR oper,X 5D 3 4*
absolute,Y EOR oper,Y 59 3 4*
(indirect,X) EOR (oper,X) 41 2 6
(indirect),Y EOR (oper),Y 51 2 5*
INC Increment Memory by One
M + 1 -> M N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage INC oper E6 2 5
zeropage,X INC oper,X F6 2 6
absolute INC oper EE 3 6
absolute,X INC oper,X FE 3 7
INX Increment Index X by One
X + 1 -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied INX E8 1 2
INY Increment Index Y by One
Y + 1 -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied INY C8 1 2
JMP Jump to New Location
(PC+1) -> PCL N Z C I D V
(PC+2) -> PCH - - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
absolute JMP oper 4C 3 3
indirect JMP (oper) 6C 3 5
JSR Jump to New Location Saving Return Address
push (PC+2), N Z C I D V
(PC+1) -> PCL - - - - - -
(PC+2) -> PCH
addressing assembler opc bytes cyles
--------------------------------------------
absolute JSR oper 20 3 6
LDA Load Accumulator with Memory
M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate LDA #oper A9 2 2
zeropage LDA oper A5 2 3
zeropage,X LDA oper,X B5 2 4
absolute LDA oper AD 3 4
absolute,X LDA oper,X BD 3 4*
absolute,Y LDA oper,Y B9 3 4*
(indirect,X) LDA (oper,X) A1 2 6
(indirect),Y LDA (oper),Y B1 2 5*
LDX Load Index X with Memory
M -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate LDX #oper A2 2 2
zeropage LDX oper A6 2 3
zeropage,Y LDX oper,Y B6 2 4
absolute LDX oper AE 3 4
absolute,Y LDX oper,Y BE 3 4*
LDY Load Index Y with Memory
M -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate LDY #oper A0 2 2
zeropage LDY oper A4 2 3
zeropage,X LDY oper,X B4 2 4
absolute LDY oper AC 3 4
absolute,X LDY oper,X BC 3 4*
LSR Shift One Bit Right (Memory or Accumulator)
0 -> [76543210] -> C N Z C I D V
- + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator LSR A 4A 1 2
zeropage LSR oper 46 2 5
zeropage,X LSR oper,X 56 2 6
absolute LSR oper 4E 3 6
absolute,X LSR oper,X 5E 3 7
NOP No Operation
--- N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied NOP EA 1 2
ORA OR Memory with Accumulator
A OR M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate ORA #oper 09 2 2
zeropage ORA oper 05 2 3
zeropage,X ORA oper,X 15 2 4
absolute ORA oper 0D 3 4
absolute,X ORA oper,X 1D 3 4*
absolute,Y ORA oper,Y 19 3 4*
(indirect,X) ORA (oper,X) 01 2 6
(indirect),Y ORA (oper),Y 11 2 5*
PHA Push Accumulator on Stack
push A N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied PHA 48 1 3
PHP Push Processor Status on Stack
push SR N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied PHP 08 1 3
PLA Pull Accumulator from Stack
pull A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied PLA 68 1 4
PLP Pull Processor Status from Stack
pull SR N Z C I D V
from stack
addressing assembler opc bytes cyles
--------------------------------------------
implied PHP 28 1 4
ROL Rotate One Bit Left (Memory or Accumulator)
C <- [76543210] <- C N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator ROL A 2A 1 2
zeropage ROL oper 26 2 5
zeropage,X ROL oper,X 36 2 6
absolute ROL oper 2E 3 6
absolute,X ROL oper,X 3E 3 7
ROR Rotate One Bit Right (Memory or Accumulator)
C -> [76543210] -> C N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator ROR A 6A 1 2
zeropage ROR oper 66 2 5
zeropage,X ROR oper,X 76 2 6
absolute ROR oper 6E 3 6
absolute,X ROR oper,X 7E 3 7
RTI Return from Interrupt
pull SR, pull PC N Z C I D V
from stack
addressing assembler opc bytes cyles
--------------------------------------------
implied RTI 40 1 6
RTS Return from Subroutine
pull PC, PC+1 -> PC N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied RTS 60 1 6
SBC Subtract Memory from Accumulator with Borrow
A - M - C -> A N Z C I D V
+ + + - - +
addressing assembler opc bytes cyles
--------------------------------------------
immidiate SBC #oper E9 2 2
zeropage SBC oper E5 2 3
zeropage,X SBC oper,X F5 2 4
absolute SBC oper ED 3 4
absolute,X SBC oper,X FD 3 4*
absolute,Y SBC oper,Y F9 3 4*
(indirect,X) SBC (oper,X) E1 2 6
(indirect),Y SBC (oper),Y F1 2 5*
SEC Set Carry Flag
1 -> C N Z C I D V
- - 1 - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied SEC 38 1 2
SED Set Decimal Flag
1 -> D N Z C I D V
- - - - 1 -
addressing assembler opc bytes cyles
--------------------------------------------
implied SED F8 1 2
SEI Set Interrupt Disable Status
1 -> I N Z C I D V
- - - 1 - -
addressing assembler opc bytes cyles
--------------------------------------------
implied SEI 78 1 2
STA Store Accumulator in Memory
A -> M N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage STA oper 85 2 3
zeropage,X STA oper,X 95 2 4
absolute STA oper 8D 3 4
absolute,X STA oper,X 9D 3 5
absolute,Y STA oper,Y 99 3 5
(indirect,X) STA (oper,X) 81 2 6
(indirect),Y STA (oper),Y 91 2 6
STX Store Index X in Memory
X -> M N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage STX oper 86 2 3
zeropage,Y STX oper,Y 96 2 4
absolute STX oper 8E 3 4
STY Sore Index Y in Memory
Y -> M N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage STY oper 84 2 3
zeropage,X STY oper,X 94 2 4
absolute STY oper 8C 3 4
TAX Transfer Accumulator to Index X
A -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TAX AA 1 2
TAY Transfer Accumulator to Index Y
A -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TAY A8 1 2
TSX Transfer Stack Pointer to Index X
SP -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TSX BA 1 2
TXA Transfer Index X to Accumulator
X -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TXA 8A 1 2
TXS Transfer Index X to Stack Register
X -> SP N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TXS 9A 1 2
TYA Transfer Index Y to Accumulator
Y -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TYA 98 1 2