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authorvin <git@vineetk.net>2024-07-04 12:11:53 -0400
committervin <git@vineetk.net>2024-07-04 12:11:53 -0400
commitc4fc40a036293a8f5899800ad3ecb1d24ba77bc4 (patch)
treedc81c2ffd74287ef8f9867e50e463513641680fb
parent5cd467eaf6b4f15f28b98c5fa49ab788dac945b3 (diff)
start implementing unofficial opcodes
Diffstat
-rw-r--r--cpu.c149
-rw-r--r--cpu.h27
-rw-r--r--opcodes.h411
3 files changed, 434 insertions, 153 deletions
diff --git a/cpu.c b/cpu.c
index 7ef4985..e3bb7d5 100644
--- a/cpu.c
+++ b/cpu.c
@@ -177,6 +177,8 @@ branch(uint16_t addr, bool cond)
177 regs.pc = addr; 177 regs.pc = addr;
178} 178}
179 179
180/* OFFICIAL OPCODES */
181
180void 182void
181ADC(uint16_t arg) 183ADC(uint16_t arg)
182{ 184{
@@ -696,6 +698,140 @@ TYA(uint16_t arg)
696 STATUS_UPDATE_NZ(regs.a); 698 STATUS_UPDATE_NZ(regs.a);
697} 699}
698 700
701/* UNOFFICIAL OPCODES */
702
703void
704AAC(uint16_t arg)
705{
706 NOP(0);
707}
708
709void
710AAX(uint16_t arg)
711{
712 NOP(0);
713}
714
715void
716ARR(uint16_t arg)
717{
718 NOP(0);
719}
720
721void
722ASR(uint16_t arg)
723{
724 NOP(0);
725}
726
727void
728ATX(uint16_t arg)
729{
730 NOP(0);
731}
732
733void
734AXA(uint16_t arg)
735{
736 NOP(0);
737}
738
739void
740AXS(uint16_t arg)
741{
742 NOP(0);
743}
744
745void
746DCP(uint16_t arg)
747{
748 NOP(0);
749}
750
751void
752DOP(uint16_t arg)
753{
754 NOP(0);
755}
756
757void
758ISC(uint16_t arg)
759{
760 NOP(0);
761}
762
763void
764KIL(uint16_t arg)
765{
766 NOP(0);
767}
768
769void
770LAR(uint16_t arg)
771{
772 NOP(0);
773}
774
775void
776LAX(uint16_t arg)
777{
778 NOP(0);
779}
780
781void
782RLA(uint16_t arg)
783{
784 NOP(0);
785}
786
787void
788RRA(uint16_t arg)
789{
790 NOP(0);
791}
792
793void
794SLO(uint16_t arg)
795{
796 NOP(0);
797}
798
799void
800SRE(uint16_t arg)
801{
802 NOP(0);
803}
804
805void
806SXA(uint16_t arg)
807{
808 NOP(0);
809}
810
811void
812SYA(uint16_t arg)
813{
814 NOP(0);
815}
816
817void
818TOP(uint16_t arg)
819{
820 NOP(0);
821}
822
823void
824XAA(uint16_t arg)
825{
826 NOP(0);
827}
828
829void
830XAS(uint16_t arg)
831{
832 NOP(0);
833}
834
699static void 835static void
700interpret(void) 836interpret(void)
701{ 837{
@@ -711,7 +847,18 @@ interpret(void)
711 printf("%02X", op); 847 printf("%02X", op);
712 for (uint8_t i = 0; i < opcodes[op].bytes - 1; i++) 848 for (uint8_t i = 0; i < opcodes[op].bytes - 1; i++)
713 printf(" %02X", peek(regs.pc + i)); 849 printf(" %02X", peek(regs.pc + i));
714 printf("\t%s ", opcodes[op].name); 850
851 if (opcodes[op].unofficial) {
852 if (opcodes[op].bytes == 1)
853 printf(" ");
854 else if (opcodes[op].bytes == 2)
855 printf(" ");
856 else if (opcodes[op].bytes == 3)
857 putchar(' ');
858 putchar('*');
859 } else
860 putchar('\t');
861 printf("%s ", opcodes[op].name);
715 862
716 mode = opcodes[op].mode; 863 mode = opcodes[op].mode;
717 arg = opcode_mem(mode); 864 arg = opcode_mem(mode);
diff --git a/cpu.h b/cpu.h
index 139ad83..b7cab89 100644
--- a/cpu.h
+++ b/cpu.h
@@ -1,5 +1,6 @@
1#include <stdint.h> 1#include <stdint.h>
2 2
3/* OFFICIAL OPCODES */
3void ADC(uint16_t arg); 4void ADC(uint16_t arg);
4void AND(uint16_t arg); 5void AND(uint16_t arg);
5void ASL_acc(uint16_t arg); 6void ASL_acc(uint16_t arg);
@@ -60,3 +61,29 @@ void TSX(uint16_t arg);
60void TXA(uint16_t arg); 61void TXA(uint16_t arg);
61void TXS(uint16_t arg); 62void TXS(uint16_t arg);
62void TYA(uint16_t arg); 63void TYA(uint16_t arg);
64
65/* UNOFFICIAL OPCODES */
66void AAC(uint16_t arg);
67void AAX(uint16_t arg);
68void ARR(uint16_t arg);
69void ASR(uint16_t arg);
70void ATX(uint16_t arg);
71void AXA(uint16_t arg);
72void AXS(uint16_t arg);
73void DCP(uint16_t arg);
74void DOP(uint16_t arg);
75void ISC(uint16_t arg);
76void KIL(uint16_t arg);
77void LAR(uint16_t arg);
78void LAX(uint16_t arg);
79void NOP(uint16_t arg);
80void RLA(uint16_t arg);
81void RRA(uint16_t arg);
82void SBC(uint16_t arg);
83void SLO(uint16_t arg);
84void SRE(uint16_t arg);
85void SXA(uint16_t arg);
86void SYA(uint16_t arg);
87void TOP(uint16_t arg);
88void XAA(uint16_t arg);
89void XAS(uint16_t arg);
diff --git a/opcodes.h b/opcodes.h
index be45bb1..ca0d1cc 100644
--- a/opcodes.h
+++ b/opcodes.h
@@ -29,160 +29,267 @@ struct opcode {
29 bool memread; 29 bool memread;
30 bool memwrite; 30 bool memwrite;
31 bool page_cross; 31 bool page_cross;
32 bool unofficial;
32 enum addressing_mode mode; 33 enum addressing_mode mode;
33}; 34};
34 35
35struct opcode opcodes[0x100] = { 36struct opcode opcodes[0x100] = {
36 /* official opcodes */ 37 /* official opcodes: https://www.nesdev.org/obelisk-6502-guide/instructions.html */
37 [0x69] = { "ADC", ADC, 2, 2, false, false, false, AM_IMM }, 38 [0x69] = { "ADC", ADC, 2, 2, false, false, false, false, AM_IMM },
38 [0x65] = { "ADC", ADC, 2, 3, true, false, false, AM_ZP }, 39 [0x65] = { "ADC", ADC, 2, 3, true, false, false, false, AM_ZP },
39 [0x75] = { "ADC", ADC, 2, 4, true, false, false, AM_ZP_X }, 40 [0x75] = { "ADC", ADC, 2, 4, true, false, false, false, AM_ZP_X },
40 [0x6D] = { "ADC", ADC, 3, 4, true, false, false, AM_ABS }, 41 [0x6D] = { "ADC", ADC, 3, 4, true, false, false, false, AM_ABS },
41 [0x7D] = { "ADC", ADC, 3, 4, true, false, true, AM_ABS_X }, 42 [0x7D] = { "ADC", ADC, 3, 4, true, false, true, false, AM_ABS_X },
42 [0x79] = { "ADC", ADC, 3, 4, true, false, true, AM_ABS_Y }, 43 [0x79] = { "ADC", ADC, 3, 4, true, false, true, false, AM_ABS_Y },
43 [0x61] = { "ADC", ADC, 2, 6, true, false, false, AM_IND_X }, 44 [0x61] = { "ADC", ADC, 2, 6, true, false, false, false, AM_IND_X },
44 [0x71] = { "ADC", ADC, 2, 5, true, false, true, AM_IND_Y }, 45 [0x71] = { "ADC", ADC, 2, 5, true, false, true, false, AM_IND_Y },
45 [0x29] = { "AND", AND, 2, 2, false, false, false, AM_IMM }, 46 [0x29] = { "AND", AND, 2, 2, false, false, false, false, AM_IMM },
46 [0x25] = { "AND", AND, 2, 3, true, false, false, AM_ZP }, 47 [0x25] = { "AND", AND, 2, 3, true, false, false, false, AM_ZP },
47 [0x35] = { "AND", AND, 2, 4, true, false, false, AM_ZP_X }, 48 [0x35] = { "AND", AND, 2, 4, true, false, false, false, AM_ZP_X },
48 [0x2D] = { "AND", AND, 3, 4, true, false, false, AM_ABS }, 49 [0x2D] = { "AND", AND, 3, 4, true, false, false, false, AM_ABS },
49 [0x3D] = { "AND", AND, 3, 4, true, false, true, AM_ABS_X }, 50 [0x3D] = { "AND", AND, 3, 4, true, false, true, false, AM_ABS_X },
50 [0x39] = { "AND", AND, 3, 4, true, false, true, AM_ABS_Y }, 51 [0x39] = { "AND", AND, 3, 4, true, false, true, false, AM_ABS_Y },
51 [0x21] = { "AND", AND, 2, 6, true, false, false, AM_IND_X }, 52 [0x21] = { "AND", AND, 2, 6, true, false, false, false, AM_IND_X },
52 [0x31] = { "AND", AND, 2, 5, true, false, true, AM_IND_Y }, 53 [0x31] = { "AND", AND, 2, 5, true, false, true, false, AM_IND_Y },
53 [0x0A] = { "ASL", ASL_acc, 1, 2, false, false, false, AM_ACC }, 54 [0x0A] = { "ASL", ASL_acc, 1, 2, false, false, false, false, AM_ACC },
54 [0x06] = { "ASL", ASL, 2, 5, false, true, false, AM_ZP }, 55 [0x06] = { "ASL", ASL, 2, 5, false, true, false, false, AM_ZP },
55 [0x16] = { "ASL", ASL, 2, 6, false, true, false, AM_ZP_X }, 56 [0x16] = { "ASL", ASL, 2, 6, false, true, false, false, AM_ZP_X },
56 [0x0E] = { "ASL", ASL, 3, 6, false, true, false, AM_ABS }, 57 [0x0E] = { "ASL", ASL, 3, 6, false, true, false, false, AM_ABS },
57 [0x1E] = { "ASL", ASL, 3, 7, false, true, false, AM_ABS_X }, 58 [0x1E] = { "ASL", ASL, 3, 7, false, true, false, false, AM_ABS_X },
58 [0x90] = { "BCC", BCC, 2, 2, false, false, true, AM_REL }, 59 [0x90] = { "BCC", BCC, 2, 2, false, false, true, false, AM_REL },
59 [0xB0] = { "BCS", BCS, 2, 2, false, false, true, AM_REL }, 60 [0xB0] = { "BCS", BCS, 2, 2, false, false, true, false, AM_REL },
60 [0xF0] = { "BEQ", BEQ, 2, 2, false, false, true, AM_REL }, 61 [0xF0] = { "BEQ", BEQ, 2, 2, false, false, true, false, AM_REL },
61 [0x24] = { "BIT", BIT, 2, 3, true, false, false, AM_ZP }, 62 [0x24] = { "BIT", BIT, 2, 3, true, false, false, false, AM_ZP },
62 [0x2C] = { "BIT", BIT, 3, 4, true, false, false, AM_ABS }, 63 [0x2C] = { "BIT", BIT, 3, 4, true, false, false, false, AM_ABS },
63 [0x30] = { "BMI", BMI, 2, 2, false, false, true, AM_REL }, 64 [0x30] = { "BMI", BMI, 2, 2, false, false, true, false, AM_REL },
64 [0xD0] = { "BNE", BNE, 2, 2, false, false, true, AM_REL }, 65 [0xD0] = { "BNE", BNE, 2, 2, false, false, true, false, AM_REL },
65 [0x10] = { "BPL", BPL, 2, 2, false, false, true, AM_REL }, 66 [0x10] = { "BPL", BPL, 2, 2, false, false, true, false, AM_REL },
66 [0x00] = { "BRK", BRK, 1, 7, false, false, false, AM_NONE }, 67 [0x00] = { "BRK", BRK, 1, 7, false, false, false, false, AM_NONE },
67 [0x50] = { "BVC", BVC, 2, 2, false, false, true, AM_REL }, 68 [0x50] = { "BVC", BVC, 2, 2, false, false, true, false, AM_REL },
68 [0x70] = { "BVS", BVS, 2, 2, false, false, true, AM_REL }, 69 [0x70] = { "BVS", BVS, 2, 2, false, false, true, false, AM_REL },
69 [0x18] = { "CLC", CLC, 1, 2, false, false, false, AM_NONE }, 70 [0x18] = { "CLC", CLC, 1, 2, false, false, false, false, AM_NONE },
70 [0xD8] = { "CLD", CLD, 1, 2, false, false, false, AM_NONE }, 71 [0xD8] = { "CLD", CLD, 1, 2, false, false, false, false, AM_NONE },
71 [0x58] = { "CLI", CLI, 1, 2, false, false, false, AM_NONE }, 72 [0x58] = { "CLI", CLI, 1, 2, false, false, false, false, AM_NONE },
72 [0xB8] = { "CLV", CLV, 1, 2, false, false, false, AM_NONE }, 73 [0xB8] = { "CLV", CLV, 1, 2, false, false, false, false, AM_NONE },
73 [0xC9] = { "CMP", CMP, 2, 2, false, false, false, AM_IMM }, 74 [0xC9] = { "CMP", CMP, 2, 2, false, false, false, false, AM_IMM },
74 [0xC5] = { "CMP", CMP, 2, 3, true, false, false, AM_ZP }, 75 [0xC5] = { "CMP", CMP, 2, 3, true, false, false, false, AM_ZP },
75 [0xD5] = { "CMP", CMP, 2, 4, true, false, false, AM_ZP_X }, 76 [0xD5] = { "CMP", CMP, 2, 4, true, false, false, false, AM_ZP_X },
76 [0xCD] = { "CMP", CMP, 3, 4, true, false, false, AM_ABS }, 77 [0xCD] = { "CMP", CMP, 3, 4, true, false, false, false, AM_ABS },
77 [0xDD] = { "CMP", CMP, 3, 4, true, false, true, AM_ABS_X }, 78 [0xDD] = { "CMP", CMP, 3, 4, true, false, true, false, AM_ABS_X },
78 [0xD9] = { "CMP", CMP, 3, 4, true, false, true, AM_ABS_Y }, 79 [0xD9] = { "CMP", CMP, 3, 4, true, false, true, false, AM_ABS_Y },
79 [0xC1] = { "CMP", CMP, 2, 6, true, false, false, AM_IND_X }, 80 [0xC1] = { "CMP", CMP, 2, 6, true, false, false, false, AM_IND_X },
80 [0xD1] = { "CMP", CMP, 2, 5, true, false, true, AM_IND_Y }, 81 [0xD1] = { "CMP", CMP, 2, 5, true, false, true, false, AM_IND_Y },
81 [0xE0] = { "CPX", CPX, 2, 2, false, false, false, AM_IMM }, 82 [0xE0] = { "CPX", CPX, 2, 2, false, false, false, false, AM_IMM },
82 [0xE4] = { "CPX", CPX, 2, 3, true, false, false, AM_ZP }, 83 [0xE4] = { "CPX", CPX, 2, 3, true, false, false, false, AM_ZP },
83 [0xEC] = { "CPX", CPX, 3, 4, true, false, false, AM_ABS }, 84 [0xEC] = { "CPX", CPX, 3, 4, true, false, false, false, AM_ABS },
84 [0xC0] = { "CPY", CPY, 2, 2, false, false, false, AM_IMM }, 85 [0xC0] = { "CPY", CPY, 2, 2, false, false, false, false, AM_IMM },
85 [0xC4] = { "CPY", CPY, 2, 3, true, false, false, AM_ZP }, 86 [0xC4] = { "CPY", CPY, 2, 3, true, false, false, false, AM_ZP },
86 [0xCC] = { "CPY", CPY, 3, 4, true, false, false, AM_ABS }, 87 [0xCC] = { "CPY", CPY, 3, 4, true, false, false, false, AM_ABS },
87 [0xC6] = { "DEC", DEC, 2, 5, false, true, false, AM_ZP }, 88 [0xC6] = { "DEC", DEC, 2, 5, false, true, false, false, AM_ZP },
88 [0xD6] = { "DEC", DEC, 2, 6, false, true, false, AM_ZP_X }, 89 [0xD6] = { "DEC", DEC, 2, 6, false, true, false, false, AM_ZP_X },
89 [0xCE] = { "DEC", DEC, 3, 6, false, true, false, AM_ABS }, 90 [0xCE] = { "DEC", DEC, 3, 6, false, true, false, false, AM_ABS },
90 [0xDE] = { "DEC", DEC, 3, 7, false, true, false, AM_ABS_X }, 91 [0xDE] = { "DEC", DEC, 3, 7, false, true, false, false, AM_ABS_X },
91 [0xCA] = { "DEX", DEX, 1, 2, false, false, false, AM_NONE }, 92 [0xCA] = { "DEX", DEX, 1, 2, false, false, false, false, AM_NONE },
92 [0x88] = { "DEY", DEY, 1, 2, false, false, false, AM_NONE }, 93 [0x88] = { "DEY", DEY, 1, 2, false, false, false, false, AM_NONE },
93 [0x49] = { "EOR", EOR, 2, 2, false, false, false, AM_IMM }, 94 [0x49] = { "EOR", EOR, 2, 2, false, false, false, false, AM_IMM },
94 [0x45] = { "EOR", EOR, 2, 3, true, false, false, AM_ZP }, 95 [0x45] = { "EOR", EOR, 2, 3, true, false, false, false, AM_ZP },
95 [0x55] = { "EOR", EOR, 2, 4, true, false, false, AM_ZP_X }, 96 [0x55] = { "EOR", EOR, 2, 4, true, false, false, false, AM_ZP_X },
96 [0x4D] = { "EOR", EOR, 3, 4, true, false, false, AM_ABS }, 97 [0x4D] = { "EOR", EOR, 3, 4, true, false, false, false, AM_ABS },
97 [0x5D] = { "EOR", EOR, 3, 4, true, false, true, AM_ABS_X }, 98 [0x5D] = { "EOR", EOR, 3, 4, true, false, true, false, AM_ABS_X },
98 [0x59] = { "EOR", EOR, 3, 4, true, false, true, AM_ABS_Y }, 99 [0x59] = { "EOR", EOR, 3, 4, true, false, true, false, AM_ABS_Y },
99 [0x41] = { "EOR", EOR, 2, 6, true, false, false, AM_IND_X }, 100 [0x41] = { "EOR", EOR, 2, 6, true, false, false, false, AM_IND_X },
100 [0x51] = { "EOR", EOR, 2, 5, true, false, true, AM_IND_Y }, 101 [0x51] = { "EOR", EOR, 2, 5, true, false, true, false, AM_IND_Y },
101 [0xE6] = { "INC", INC, 2, 5, false, true, false, AM_ZP }, 102 [0xE6] = { "INC", INC, 2, 5, false, true, false, false, AM_ZP },
102 [0xF6] = { "INC", INC, 2, 6, false, true, false, AM_ZP_X }, 103 [0xF6] = { "INC", INC, 2, 6, false, true, false, false, AM_ZP_X },
103 [0xEE] = { "INC", INC, 3, 6, false, true, false, AM_ABS }, 104 [0xEE] = { "INC", INC, 3, 6, false, true, false, false, AM_ABS },
104 [0xFE] = { "INC", INC, 3, 7, false, true, false, AM_ABS_X }, 105 [0xFE] = { "INC", INC, 3, 7, false, true, false, false, AM_ABS_X },
105 [0xE8] = { "INX", INX, 1, 2, false, false, false, AM_NONE }, 106 [0xE8] = { "INX", INX, 1, 2, false, false, false, false, AM_NONE },
106 [0xC8] = { "INY", INY, 1, 2, false, false, false, AM_NONE }, 107 [0xC8] = { "INY", INY, 1, 2, false, false, false, false, AM_NONE },
107 [0x4C] = { "JMP", JMP, 3, 3, false, false, false, AM_ABS }, 108 [0x4C] = { "JMP", JMP, 3, 3, false, false, false, false, AM_ABS },
108 [0x6C] = { "JMP", JMP, 3, 5, false, false, false, AM_IND }, 109 [0x6C] = { "JMP", JMP, 3, 5, false, false, false, false, AM_IND },
109 [0x20] = { "JSR", JSR, 3, 6, false, false, false, AM_ABS }, 110 [0x20] = { "JSR", JSR, 3, 6, false, false, false, false, AM_ABS },
110 [0xA9] = { "LDA", LDA, 2, 2, false, false, false, AM_IMM }, 111 [0xA9] = { "LDA", LDA, 2, 2, false, false, false, false, AM_IMM },
111 [0xA5] = { "LDA", LDA, 2, 3, true, false, false, AM_ZP }, 112 [0xA5] = { "LDA", LDA, 2, 3, true, false, false, false, AM_ZP },
112 [0xB5] = { "LDA", LDA, 2, 4, true, false, false, AM_ZP_X }, 113 [0xB5] = { "LDA", LDA, 2, 4, true, false, false, false, AM_ZP_X },
113 [0xAD] = { "LDA", LDA, 3, 4, true, false, false, AM_ABS }, 114 [0xAD] = { "LDA", LDA, 3, 4, true, false, false, false, AM_ABS },
114 [0xBD] = { "LDA", LDA, 3, 4, true, false, true, AM_ABS_X }, 115 [0xBD] = { "LDA", LDA, 3, 4, true, false, true, false, AM_ABS_X },
115 [0xB9] = { "LDA", LDA, 3, 4, true, false, true, AM_ABS_Y }, 116 [0xB9] = { "LDA", LDA, 3, 4, true, false, true, false, AM_ABS_Y },
116 [0xA1] = { "LDA", LDA, 2, 6, true, false, false, AM_IND_X }, 117 [0xA1] = { "LDA", LDA, 2, 6, true, false, false, false, AM_IND_X },
117 [0xB1] = { "LDA", LDA, 2, 5, true, false, true, AM_IND_Y }, 118 [0xB1] = { "LDA", LDA, 2, 5, true, false, true, false, AM_IND_Y },
118 [0xA2] = { "LDX", LDX, 2, 2, false, false, false, AM_IMM }, 119 [0xA2] = { "LDX", LDX, 2, 2, false, false, false, false, AM_IMM },
119 [0xA6] = { "LDX", LDX, 2, 3, true, false, false, AM_ZP }, 120 [0xA6] = { "LDX", LDX, 2, 3, true, false, false, false, AM_ZP },
120 [0xB6] = { "LDX", LDX, 2, 4, true, false, false, AM_ZP_Y }, 121 [0xB6] = { "LDX", LDX, 2, 4, true, false, false, false, AM_ZP_Y },
121 [0xAE] = { "LDX", LDX, 3, 4, true, false, false, AM_ABS }, 122 [0xAE] = { "LDX", LDX, 3, 4, true, false, false, false, AM_ABS },
122 [0xBE] = { "LDX", LDX, 3, 4, true, false, true, AM_ABS_Y }, 123 [0xBE] = { "LDX", LDX, 3, 4, true, false, true, false, AM_ABS_Y },
123 [0xA0] = { "LDY", LDY, 2, 2, false, false, false, AM_IMM }, 124 [0xA0] = { "LDY", LDY, 2, 2, false, false, false, false, AM_IMM },
124 [0xA4] = { "LDY", LDY, 2, 3, true, false, false, AM_ZP }, 125 [0xA4] = { "LDY", LDY, 2, 3, true, false, false, false, AM_ZP },
125 [0xB4] = { "LDY", LDY, 2, 4, true, false, false, AM_ZP_X }, 126 [0xB4] = { "LDY", LDY, 2, 4, true, false, false, false, AM_ZP_X },
126 [0xAC] = { "LDY", LDY, 3, 4, true, false, false, AM_ABS }, 127 [0xAC] = { "LDY", LDY, 3, 4, true, false, false, false, AM_ABS },
127 [0xBC] = { "LDY", LDY, 3, 4, true, false, true, AM_ABS_X }, 128 [0xBC] = { "LDY", LDY, 3, 4, true, false, true, false, AM_ABS_X },
128 [0x4A] = { "LSR", LSR_acc, 1, 2, false, false, false, AM_ACC }, 129 [0x4A] = { "LSR", LSR_acc, 1, 2, false, false, false, false, AM_ACC },
129 [0x46] = { "LSR", LSR, 2, 5, false, true, false, AM_ZP }, 130 [0x46] = { "LSR", LSR, 2, 5, false, true, false, false, AM_ZP },
130 [0x56] = { "LSR", LSR, 2, 6, false, true, false, AM_ZP_X }, 131 [0x56] = { "LSR", LSR, 2, 6, false, true, false, false, AM_ZP_X },
131 [0x4E] = { "LSR", LSR, 3, 6, false, true, false, AM_ABS }, 132 [0x4E] = { "LSR", LSR, 3, 6, false, true, false, false, AM_ABS },
132 [0x5E] = { "LSR", LSR, 3, 7, false, true, false, AM_ABS_X }, 133 [0x5E] = { "LSR", LSR, 3, 7, false, true, false, false, AM_ABS_X },
133 [0xEA] = { "NOP", NOP, 1, 2, false, false, false, AM_NONE }, 134 [0xEA] = { "NOP", NOP, 1, 2, false, false, false, false, AM_NONE },
134 [0x09] = { "ORA", ORA, 2, 2, false, false, false, AM_IMM }, 135 [0x09] = { "ORA", ORA, 2, 2, false, false, false, false, AM_IMM },
135 [0x05] = { "ORA", ORA, 2, 3, true, false, false, AM_ZP }, 136 [0x05] = { "ORA", ORA, 2, 3, true, false, false, false, AM_ZP },
136 [0x15] = { "ORA", ORA, 2, 4, true, false, false, AM_ZP_X }, 137 [0x15] = { "ORA", ORA, 2, 4, true, false, false, false, AM_ZP_X },
137 [0x0D] = { "ORA", ORA, 3, 4, true, false, false, AM_ABS }, 138 [0x0D] = { "ORA", ORA, 3, 4, true, false, false, false, AM_ABS },
138 [0x1D] = { "ORA", ORA, 3, 4, true, false, true, AM_ABS_X }, 139 [0x1D] = { "ORA", ORA, 3, 4, true, false, true, false, AM_ABS_X },
139 [0x19] = { "ORA", ORA, 3, 4, true, false, true, AM_ABS_Y }, 140 [0x19] = { "ORA", ORA, 3, 4, true, false, true, false, AM_ABS_Y },
140 [0x01] = { "ORA", ORA, 2, 6, true, false, false, AM_IND_X }, 141 [0x01] = { "ORA", ORA, 2, 6, true, false, false, false, AM_IND_X },
141 [0x11] = { "ORA", ORA, 2, 5, true, false, true, AM_IND_Y }, 142 [0x11] = { "ORA", ORA, 2, 5, true, false, true, false, AM_IND_Y },
142 [0x48] = { "PHA", PHA, 1, 3, false, false, false, AM_NONE }, 143 [0x48] = { "PHA", PHA, 1, 3, false, false, false, false, AM_NONE },
143 [0x08] = { "PHP", PHP, 1, 3, false, false, false, AM_NONE }, 144 [0x08] = { "PHP", PHP, 1, 3, false, false, false, false, AM_NONE },
144 [0x68] = { "PLA", PLA, 1, 4, false, false, false, AM_NONE }, 145 [0x68] = { "PLA", PLA, 1, 4, false, false, false, false, AM_NONE },
145 [0x28] = { "PLP", PLP, 1, 4, false, false, false, AM_NONE }, 146 [0x28] = { "PLP", PLP, 1, 4, false, false, false, false, AM_NONE },
146 [0x2A] = { "ROL", ROL_acc, 1, 2, false, false, false, AM_ACC }, 147 [0x2A] = { "ROL", ROL_acc, 1, 2, false, false, false, false, AM_ACC },
147 [0x26] = { "ROL", ROL, 2, 5, false, true, false, AM_ZP }, 148 [0x26] = { "ROL", ROL, 2, 5, false, true, false, false, AM_ZP },
148 [0x36] = { "ROL", ROL, 2, 6, false, true, false, AM_ZP_X }, 149 [0x36] = { "ROL", ROL, 2, 6, false, true, false, false, AM_ZP_X },
149 [0x2E] = { "ROL", ROL, 3, 6, false, true, false, AM_ABS }, 150 [0x2E] = { "ROL", ROL, 3, 6, false, true, false, false, AM_ABS },
150 [0x3E] = { "ROL", ROL, 3, 7, false, true, false, AM_ABS_X }, 151 [0x3E] = { "ROL", ROL, 3, 7, false, true, false, false, AM_ABS_X },
151 [0x6A] = { "ROR", ROR_acc, 1, 2, false, false, false, AM_ACC }, 152 [0x6A] = { "ROR", ROR_acc, 1, 2, false, false, false, false, AM_ACC },
152 [0x66] = { "ROR", ROR, 2, 5, false, true, false, AM_ZP }, 153 [0x66] = { "ROR", ROR, 2, 5, false, true, false, false, AM_ZP },
153 [0x76] = { "ROR", ROR, 2, 6, false, true, false, AM_ZP_X }, 154 [0x76] = { "ROR", ROR, 2, 6, false, true, false, false, AM_ZP_X },
154 [0x6E] = { "ROR", ROR, 3, 6, false, true, false, AM_ABS }, 155 [0x6E] = { "ROR", ROR, 3, 6, false, true, false, false, AM_ABS },
155 [0x7E] = { "ROR", ROR, 3, 7, false, true, false, AM_ABS_X }, 156 [0x7E] = { "ROR", ROR, 3, 7, false, true, false, false, AM_ABS_X },
156 [0x40] = { "RTI", RTI, 1, 6, false, false, false, AM_NONE }, 157 [0x40] = { "RTI", RTI, 1, 6, false, false, false, false, AM_NONE },
157 [0x60] = { "RTS", RTS, 1, 6, false, false, false, AM_NONE }, 158 [0x60] = { "RTS", RTS, 1, 6, false, false, false, false, AM_NONE },
158 [0xE9] = { "SBC", SBC, 2, 2, false, false, false, AM_IMM }, 159 [0xE9] = { "SBC", SBC, 2, 2, false, false, false, false, AM_IMM },
159 [0xE5] = { "SBC", SBC, 2, 3, true, false, false, AM_ZP }, 160 [0xE5] = { "SBC", SBC, 2, 3, true, false, false, false, AM_ZP },
160 [0xF5] = { "SBC", SBC, 2, 4, true, false, false, AM_ZP_X }, 161 [0xF5] = { "SBC", SBC, 2, 4, true, false, false, false, AM_ZP_X },
161 [0xED] = { "SBC", SBC, 3, 4, true, false, false, AM_ABS }, 162 [0xED] = { "SBC", SBC, 3, 4, true, false, false, false, AM_ABS },
162 [0xFD] = { "SBC", SBC, 3, 4, true, false, true, AM_ABS_X }, 163 [0xFD] = { "SBC", SBC, 3, 4, true, false, true, false, AM_ABS_X },
163 [0xF9] = { "SBC", SBC, 3, 4, true, false, true, AM_ABS_Y }, 164 [0xF9] = { "SBC", SBC, 3, 4, true, false, true, false, AM_ABS_Y },
164 [0xE1] = { "SBC", SBC, 2, 6, true, false, false, AM_IND_X }, 165 [0xE1] = { "SBC", SBC, 2, 6, true, false, false, false, AM_IND_X },
165 [0xF1] = { "SBC", SBC, 2, 5, true, false, true, AM_IND_Y }, 166 [0xF1] = { "SBC", SBC, 2, 5, true, false, true, false, AM_IND_Y },
166 [0x38] = { "SEC", SEC, 1, 2, false, false, false, AM_NONE }, 167 [0x38] = { "SEC", SEC, 1, 2, false, false, false, false, AM_NONE },
167 [0xF8] = { "SED", SED, 1, 2, false, false, false, AM_NONE }, 168 [0xF8] = { "SED", SED, 1, 2, false, false, false, false, AM_NONE },
168 [0x78] = { "SEI", SEI, 1, 2, false, false, false, AM_NONE }, 169 [0x78] = { "SEI", SEI, 1, 2, false, false, false, false, AM_NONE },
169 [0x85] = { "STA", STA, 2, 3, false, true, false, AM_ZP }, 170 [0x85] = { "STA", STA, 2, 3, false, true, false, false, AM_ZP },
170 [0x95] = { "STA", STA, 2, 4, false, true, false, AM_ZP_X }, 171 [0x95] = { "STA", STA, 2, 4, false, true, false, false, AM_ZP_X },
171 [0x8D] = { "STA", STA, 3, 4, false, true, false, AM_ABS }, 172 [0x8D] = { "STA", STA, 3, 4, false, true, false, false, AM_ABS },
172 [0x9D] = { "STA", STA, 3, 5, false, true, false, AM_ABS_X }, 173 [0x9D] = { "STA", STA, 3, 5, false, true, false, false, AM_ABS_X },
173 [0x99] = { "STA", STA, 3, 5, false, true, false, AM_ABS_Y }, 174 [0x99] = { "STA", STA, 3, 5, false, true, false, false, AM_ABS_Y },
174 [0x81] = { "STA", STA, 2, 6, false, true, false, AM_IND_X }, 175 [0x81] = { "STA", STA, 2, 6, false, true, false, false, AM_IND_X },
175 [0x91] = { "STA", STA, 2, 6, false, true, false, AM_IND_Y }, 176 [0x91] = { "STA", STA, 2, 6, false, true, false, false, AM_IND_Y },
176 [0x86] = { "STX", STX, 2, 3, false, true, false, AM_ZP }, 177 [0x86] = { "STX", STX, 2, 3, false, true, false, false, AM_ZP },
177 [0x96] = { "STX", STX, 2, 4, false, true, false, AM_ZP_Y }, 178 [0x96] = { "STX", STX, 2, 4, false, true, false, false, AM_ZP_Y },
178 [0x8E] = { "STX", STX, 3, 4, false, true, false, AM_ABS }, 179 [0x8E] = { "STX", STX, 3, 4, false, true, false, false, AM_ABS },
179 [0x84] = { "STY", STY, 2, 3, false, true, false, AM_ZP }, 180 [0x84] = { "STY", STY, 2, 3, false, true, false, false, AM_ZP },
180 [0x94] = { "STY", STY, 2, 4, false, true, false, AM_ZP_X }, 181 [0x94] = { "STY", STY, 2, 4, false, true, false, false, AM_ZP_X },
181 [0x8C] = { "STY", STY, 3, 4, false, true, false, AM_ABS }, 182 [0x8C] = { "STY", STY, 3, 4, false, true, false, false, AM_ABS },
182 [0xAA] = { "TAX", TAX, 1, 2, false, false, false, AM_NONE }, 183 [0xAA] = { "TAX", TAX, 1, 2, false, false, false, false, AM_NONE },
183 [0xA8] = { "TAY", TAY, 1, 2, false, false, false, AM_NONE }, 184 [0xA8] = { "TAY", TAY, 1, 2, false, false, false, false, AM_NONE },
184 [0xBA] = { "TSX", TSX, 1, 2, false, false, false, AM_NONE }, 185 [0xBA] = { "TSX", TSX, 1, 2, false, false, false, false, AM_NONE },
185 [0x8A] = { "TXA", TXA, 1, 2, false, false, false, AM_NONE }, 186 [0x8A] = { "TXA", TXA, 1, 2, false, false, false, false, AM_NONE },
186 [0x9A] = { "TXS", TXS, 1, 2, false, false, false, AM_NONE }, 187 [0x9A] = { "TXS", TXS, 1, 2, false, false, false, false, AM_NONE },
187 [0x98] = { "TYA", TYA, 1, 2, false, false, false, AM_NONE }, 188 [0x98] = { "TYA", TYA, 1, 2, false, false, false, false, AM_NONE },
189 /* unofficial opcodes: https://www.nesdev.org/undocumented_opcodes.txt */
190 [0x0B] = { "AAC", AAC, 2, 2, false, false, false, true, AM_IMM },
191 [0x2B] = { "AAC", AAC, 2, 2, false, false, false, true, AM_IMM },
192 [0x87] = { "AAX", AAX, 2, 3, false, false, false, true, AM_ZP },
193 [0x97] = { "AAX", AAX, 2, 4, false, false, false, true, AM_ZP_Y },
194 [0x83] = { "AAX", AAX, 2, 6, false, false, false, true, AM_IND_X },
195 [0x8F] = { "AAX", AAX, 3, 4, false, false, false, true, AM_ABS },
196 [0x6B] = { "ARR", ARR, 2, 2, false, false, false, true, AM_IMM },
197 [0x4B] = { "ASR", ASR, 2, 2, false, false, false, true, AM_IMM },
198 [0xAB] = { "ATX", ATX, 2, 2, false, false, false, true, AM_IMM },
199 [0x9F] = { "AXA", AXA, 3, 5, false, false, false, true, AM_ABS_Y },
200 [0x93] = { "AXA", AXA, 2, 6, false, false, false, true, AM_IND_Y },
201 [0xCB] = { "AXS", AXS, 2, 2, false, false, false, true, AM_IMM },
202 [0xC7] = { "DCP", DCP, 2, 5, false, false, false, true, AM_ZP },
203 [0xD7] = { "DCP", DCP, 2, 6, false, false, false, true, AM_ZP_X },
204 [0xCF] = { "DCP", DCP, 3, 6, false, false, false, true, AM_ABS },
205 [0xDF] = { "DCP", DCP, 3, 7, false, false, false, true, AM_ABS_X },
206 [0xDB] = { "DCP", DCP, 3, 7, false, false, false, true, AM_ABS_Y },
207 [0xC3] = { "DCP", DCP, 2, 8, false, false, false, true, AM_IND_X },
208 [0xD3] = { "DCP", DCP, 2, 8, false, false, false, true, AM_IND_Y },
209 [0x04] = { "NOP", NOP, 2, 3, true, false, false, true, AM_ZP },
210 [0x14] = { "NOP", NOP, 2, 4, true, false, false, true, AM_ZP_X },
211 [0x34] = { "NOP", NOP, 2, 4, true, false, false, true, AM_ZP_X },
212 [0x44] = { "NOP", NOP, 2, 3, true, false, false, true, AM_ZP },
213 [0x54] = { "NOP", NOP, 2, 4, true, false, false, true, AM_ZP_X },
214 [0x64] = { "NOP", NOP, 2, 3, true, false, false, true, AM_ZP },
215 [0x74] = { "NOP", NOP, 2, 4, true, false, false, true, AM_ZP_X },
216 [0x80] = { "NOP", NOP, 2, 2, false, false, false, true, AM_IMM },
217 [0x82] = { "NOP", NOP, 2, 2, false, false, false, true, AM_IMM },
218 [0x89] = { "NOP", NOP, 2, 2, false, false, false, true, AM_IMM },
219 [0xC2] = { "NOP", NOP, 2, 2, false, false, false, true, AM_IMM },
220 [0xD4] = { "NOP", NOP, 2, 4, false, false, false, true, AM_ZP_X },
221 [0xE2] = { "NOP", NOP, 2, 2, false, false, false, true, AM_IMM },
222 [0xF4] = { "NOP", NOP, 2, 4, false, false, false, true, AM_ZP_X },
223 [0xE7] = { "ISC", ISC, 2, 5, false, false, false, true, AM_ZP },
224 [0xF7] = { "ISC", ISC, 2, 6, false, false, false, true, AM_ZP_X },
225 [0xEF] = { "ISC", ISC, 3, 6, false, false, false, true, AM_ABS },
226 [0xFF] = { "ISC", ISC, 3, 7, false, false, false, true, AM_ABS_X },
227 [0xFB] = { "ISC", ISC, 3, 7, false, false, false, true, AM_ABS_Y },
228 [0xE3] = { "ISC", ISC, 2, 8, false, false, false, true, AM_IND_X },
229 [0xF3] = { "ISC", ISC, 2, 8, false, false, false, true, AM_IND_Y },
230 [0x02] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
231 [0x12] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
232 [0x22] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
233 [0x32] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
234 [0x42] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
235 [0x52] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
236 [0x62] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
237 [0x72] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
238 [0x92] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
239 [0xB2] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
240 [0xD2] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
241 [0xF2] = { "KIL", KIL, 1, 0, false, false, false, true, AM_NONE },
242 [0xBB] = { "LAR", LAR, 3, 4, false, false, true, true, AM_ABS_Y },
243 [0xA7] = { "LAX", LAX, 2, 3, false, false, false, true, AM_ZP },
244 [0xB7] = { "LAX", LAX, 2, 4, false, false, false, true, AM_ZP_Y },
245 [0xAF] = { "LAX", LAX, 3, 4, false, false, false, true, AM_ABS },
246 [0xBF] = { "LAX", LAX, 3, 4, false, false, true, true, AM_ABS_Y },
247 [0xA3] = { "LAX", LAX, 2, 6, false, false, false, true, AM_IND_X },
248 [0xB3] = { "LAX", LAX, 2, 5, false, false, true, true, AM_IND_Y },
249 [0x1A] = { "NOP", NOP, 1, 2, false, false, false, true, AM_NONE },
250 [0x3A] = { "NOP", NOP, 1, 2, false, false, false, true, AM_NONE },
251 [0x5A] = { "NOP", NOP, 1, 2, false, false, false, true, AM_NONE },
252 [0x7A] = { "NOP", NOP, 1, 2, false, false, false, true, AM_NONE },
253 [0xDA] = { "NOP", NOP, 1, 2, false, false, false, true, AM_NONE },
254 [0xFA] = { "NOP", NOP, 1, 2, false, false, false, true, AM_NONE },
255 [0x27] = { "RLA", RLA, 2, 5, false, false, false, true, AM_ZP },
256 [0x37] = { "RLA", RLA, 2, 6, false, false, false, true, AM_ZP_X },
257 [0x2F] = { "RLA", RLA, 3, 6, false, false, false, true, AM_ABS },
258 [0x3F] = { "RLA", RLA, 3, 7, false, false, false, true, AM_ABS_X },
259 [0x3B] = { "RLA", RLA, 3, 7, false, false, false, true, AM_ABS_Y },
260 [0x23] = { "RLA", RLA, 2, 8, false, false, false, true, AM_IND_X },
261 [0x33] = { "RLA", RLA, 2, 8, false, false, false, true, AM_IND_Y },
262 [0x67] = { "RRA", RRA, 2, 5, false, false, false, true, AM_ZP },
263 [0x77] = { "RRA", RRA, 2, 6, false, false, false, true, AM_ZP_X },
264 [0x6F] = { "RRA", RRA, 3, 6, false, false, false, true, AM_ABS },
265 [0x7F] = { "RRA", RRA, 3, 7, false, false, false, true, AM_ABS_X },
266 [0x7B] = { "RRA", RRA, 3, 7, false, false, false, true, AM_ABS_Y },
267 [0x63] = { "RRA", RRA, 2, 8, false, false, false, true, AM_IND_X },
268 [0x73] = { "RRA", RRA, 2, 8, false, false, false, true, AM_IND_Y },
269 [0xEB] = { "SBC", SBC, 2, 2, false, false, false, true, AM_IMM },
270 [0x07] = { "SLO", SLO, 2, 5, false, false, false, true, AM_ZP },
271 [0x17] = { "SLO", SLO, 2, 6, false, false, false, true, AM_ZP_X },
272 [0x0F] = { "SLO", SLO, 3, 6, false, false, false, true, AM_ABS },
273 [0x1F] = { "SLO", SLO, 3, 7, false, false, false, true, AM_ABS_X },
274 [0x1B] = { "SLO", SLO, 3, 7, false, false, false, true, AM_ABS_Y },
275 [0x03] = { "SLO", SLO, 2, 8, false, false, false, true, AM_IND_X },
276 [0x13] = { "SLO", SLO, 2, 8, false, false, false, true, AM_IND_Y },
277 [0x47] = { "SRE", SRE, 2, 5, false, false, false, true, AM_ZP },
278 [0x57] = { "SRE", SRE, 2, 6, false, false, false, true, AM_ZP_X },
279 [0x4F] = { "SRE", SRE, 3, 6, false, false, false, true, AM_ABS },
280 [0x5F] = { "SRE", SRE, 3, 7, false, false, false, true, AM_ABS_X },
281 [0x5B] = { "SRE", SRE, 3, 7, false, false, false, true, AM_ABS_Y },
282 [0x43] = { "SRE", SRE, 2, 8, false, false, false, true, AM_IND_X },
283 [0x53] = { "SRE", SRE, 2, 8, false, false, false, true, AM_IND_Y },
284 [0x9E] = { "SXA", SXA, 3, 5, false, false, false, true, AM_ABS_Y },
285 [0x9C] = { "SYA", SYA, 3, 5, false, false, false, true, AM_ABS_X },
286 [0x0C] = { "NOP", NOP, 3, 4, true, false, false, true, AM_ABS },
287 [0x1C] = { "NOP", NOP, 3, 4, true, false, true, true, AM_ABS_X },
288 [0x3C] = { "NOP", NOP, 3, 4, true, false, true, true, AM_ABS_X },
289 [0x5C] = { "NOP", NOP, 3, 4, true, false, true, true, AM_ABS_X },
290 [0x7C] = { "NOP", NOP, 3, 4, true, false, true, true, AM_ABS_X },
291 [0xDC] = { "NOP", NOP, 3, 4, true, false, true, true, AM_ABS_X },
292 [0xFC] = { "NOP", NOP, 3, 4, true, false, true, true, AM_ABS_X },
293 [0x8B] = { "XAA", XAA, 2, 2, false, false, false, true, AM_IMM },
294 [0x9B] = { "XAS", XAS, 3, 5, false, false, false, true, AM_ABS_Y },
188}; 295};
generated by cgit v1.2.3 (git 2.25.1) at 2026-09-03 04:51:07 +0000