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code cleanup

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This commit is contained in:
jborza 2019-04-14 13:24:02 +02:00
parent dc94c7235c
commit da24007a36
6 changed files with 47 additions and 19 deletions
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2
.gitignore vendored
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@ -55,3 +55,5 @@ dkms.conf
/.vs/
/Debug
/Release
/emu6502.vcxproj.user
/emu6502.vcxproj.filters

1
cpu.c
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@ -3,6 +3,7 @@
#include "opcodes.h"
#include <stdio.h>
#include <memory.h>
#include <stdlib.h>
void* unimplemented_instruction(State6502* state) {
printf("Error: unimplemented instruction\n");

52
disassembler.c
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@ -1,32 +1,50 @@
#include "types.h"
#include "opcodes.h"
#include "disassembler.h"
#include <stdio.h>
void disassemble_6502(byte* buffer, word pc) {
printf("%04d ", pc);
byte* code = &buffer[pc];
int bytes = 1;
char op[128];
switch (*code) {
case 0x00: printf("BRK"); break;
case ORA_IMM: printf("ORA #$%02x", code[1]); break;
case ORA_ZP: printf("ORA $%02x", code[1]); break;
case ORA_ZPX: printf("ORA $%02x,X", code[1]); break;
case ORA_ABS: printf("ORA $%02x%02x", code[2], code[1]); break;
case ORA_ABSX: printf("ORA $%02x%02x,X", code[2], code[1]); break;
case ORA_ABSY: printf("ORA $%02x%02x,Y", code[2], code[1]); break;
case ORA_INDX: printf("ORA ($%02x,X)", code[1]); break;
case ORA_INDY: printf("ORA ($%02x),Y", code[1]); break;
case LDA_IMM: printf("LDA #$%02x", code[1]); break;
case LDA_ZP: printf("LDA $%02x", code[1]); break;
case LDA_ZPX: printf("LDA $%02x,X", code[1]); break;
case LDA_ABS: printf("LDA $%02x%02x", code[2], code[1]); break;
case LDA_ABSX: printf("LDA $%02x%02x,X", code[2], code[1]); break;
case LDA_ABSY: printf("LDA $%02x%02x,Y", code[2], code[1]); break;
case LDA_INDX: printf("LDA ($%02x,X)", code[1]); break;
case LDA_INDY: printf("LDA ($%02x),Y", code[1]); break;
case 0x00: sprintf(op,"BRK"); break;
case ORA_IMM: sprintf(op, "ORA #$%02x", code[1]); break;
case ORA_ZP: sprintf(op, "ORA $%02x", code[1]); break;
case ORA_ZPX: sprintf(op, "ORA $%02x,X", code[1]); break;
case ORA_ABS: sprintf(op, "ORA $%02x%02x", code[2], code[1]); break;
case ORA_ABSX: sprintf(op, "ORA $%02x%02x,X", code[2], code[1]); break;
case ORA_ABSY: sprintf(op, "ORA $%02x%02x,Y", code[2], code[1]); break;
case ORA_INDX: sprintf(op, "ORA ($%02x,X)", code[1]); break;
case ORA_INDY: sprintf(op, "ORA ($%02x),Y", code[1]); break;
case LDA_IMM: sprintf(op, "LDA #$%02x", code[1]); break;
case LDA_ZP: sprintf(op, "LDA $%02x", code[1]); break;
case LDA_ZPX: sprintf(op, "LDA $%02x,X", code[1]); break;
case LDA_ABS: sprintf(op, "LDA $%02x%02x", code[2], code[1]); break;
case LDA_ABSX: sprintf(op, "LDA $%02x%02x,X", code[2], code[1]); break;
case LDA_ABSY: sprintf(op, "LDA $%02x%02x,Y", code[2], code[1]); break;
case LDA_INDX: sprintf(op, "LDA ($%02x,X)", code[1]); break;
case LDA_INDY: sprintf(op, "LDA ($%02x),Y", code[1]); break;
case 0xEA: printf("NOP"); break;
default:
printf("UNKNOWN %02x", *code);
}
if (bytes > 1) {
printf("%02x ", code[1]);
}
else {
printf(" ");
}
if (bytes > 2) {
printf("%02x ", code[2]);
}
else {
printf(" ");
}
printf(op);
printf("\n");
}

2
emu6502.c
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@ -21,6 +21,8 @@ byte* read_game() {
int main()
{
run_tests();
printf("All tests succeeded.\n");
return 0;
}
//void emulate() {

4
test6502.c
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@ -1,9 +1,13 @@
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include "types.h"
#include "test6502.h"
#include "opcodes.h"
#include "state.h"
#include "disassembler.h"
#include "cpu.h"
void print_state(State6502* state) {
printf("\tC=%d,Z=%d,I=%d,D=%d,B=%d,V=%d,N=%d\n", state->flags.c, state->flags.z, state->flags.i, state->flags.d, state->flags.b, state->flags.v, state->flags.n);

5
types.h
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@ -1,5 +1,6 @@
#pragma once
typedef unsigned __int8 uint8_t;
typedef unsigned __int16 uint16_t;
#include <stdint.h>
//typedef unsigned __int8 uint8_t;
//typedef unsigned __int16 uint16_t;
typedef uint8_t byte;
typedef uint16_t word;