mirror of
https://github.com/jborza/emu6502.git
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32 lines
1.2 KiB
C
32 lines
1.2 KiB
C
#include "types.h"
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#include "opcodes.h"
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#include "disassembler.h"
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void disassemble_6502(byte* buffer, word pc) {
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printf("%04d ", pc);
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byte* code = &buffer[pc];
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switch (*code) {
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case 0x00: printf("BRK"); break;
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case ORA_IMM: printf("ORA #$%02x", code[1]); break;
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case ORA_ZP: printf("ORA $%02x", code[1]); break;
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case ORA_ZPX: printf("ORA $%02x,X", code[1]); break;
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case ORA_ABS: printf("ORA $%02x%02x", code[2], code[1]); break;
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case ORA_ABSX: printf("ORA $%02x%02x,X", code[2], code[1]); break;
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case ORA_ABSY: printf("ORA $%02x%02x,Y", code[2], code[1]); break;
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case ORA_INDX: printf("ORA ($%02x,X)", code[1]); break;
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case ORA_INDY: printf("ORA ($%02x),Y", code[1]); break;
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case LDA_IMM: printf("LDA #$%02x", code[1]); break;
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case LDA_ZP: printf("LDA $%02x", code[1]); break;
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case LDA_ZPX: printf("LDA $%02x,X", code[1]); break;
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case LDA_ABS: printf("LDA $%02x%02x", code[2], code[1]); break;
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case LDA_ABSX: printf("LDA $%02x%02x,X", code[2], code[1]); break;
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case LDA_ABSY: printf("LDA $%02x%02x,Y", code[2], code[1]); break;
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case LDA_INDX: printf("LDA ($%02x,X)", code[1]); break;
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case LDA_INDY: printf("LDA ($%02x),Y", code[1]); break;
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case 0xEA: printf("NOP"); break;
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default:
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printf("UNKNOWN %02x", *code);
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}
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printf("\n");
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} |