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6502-emu
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Static-ify instruction arrays

This commit is contained in:
David Buchanan 2020-12-11 16:18:42 +00:00
parent c3674370ef
commit 64df2291fc
3 changed files with 435 additions and 367 deletions
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8
6502-emu.c
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@ -160,9 +160,9 @@ int main(int argc, char *argv[])
}
if (optind >= argc) {
fprintf(stderr, "Error: expected binary file to load\n\n");
usage(argv);
exit(EXIT_FAILURE);
fprintf(stderr, "Error: expected binary file to load\n\n");
usage(argv);
exit(EXIT_FAILURE);
}
if (load_rom(argv[optind], load_addr) != 0) {
printf("Error loading \"%s\".\n", argv[optind]);
@ -171,7 +171,7 @@ int main(int argc, char *argv[])
if (interactive) raw_stdin(); // allow individual keystrokes to be detected
init_tables();
//init_tables();
init_uart();
reset_cpu(a, x, y, sp, sr, pc);

780
6502.c
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File diff suppressed because it is too large Load Diff

14
6502.h
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@ -19,8 +19,8 @@ extern uint8_t SP; // points to first empty stack location
extern uint8_t extra_cycles;
extern uint64_t total_cycles;
extern void * read_addr;
extern void * write_addr;
extern void *read_addr;
extern void *write_addr;
struct StatusBits{
bool carry:1; // bit 0
@ -58,20 +58,20 @@ typedef enum {
} Mode;
typedef struct {
char * mnemonic;
char *mnemonic;
void (*function)();
Mode mode;
uint8_t cycles;
} Instruction;
extern Instruction instructions[0x100];
//extern Instruction instructions[0x100];
void init_tables();
//void init_tables();
void reset_cpu(int _a, int _x, int _y, int _sp, int _sr, int _pc);
int load_rom(char * filename, int load_addr);
int load_rom(char *filename, int load_addr);
int step_cpu(int verbose);
void save_memory(char * filename);
void save_memory(char *filename);