65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
// emulator.c
|
|
|
|
// SplitBit Emulator
|
|
// Small 8-Bit Harvard Architecture CPU
|
|
// Written by Anachronaut
|
|
// 10/15/2024
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include "cpu.h"
|
|
#include "utility.h"
|
|
#include <string.h>
|
|
#include <getopt.h>
|
|
|
|
uint8_t debugEnable = 0;
|
|
int cycleCount = 0;
|
|
char *programFile = NULL;
|
|
|
|
// Memory Banks:
|
|
uint8_t Program[0x10000], Data[0x10000];
|
|
|
|
int main (int argc, char *argv[]) {
|
|
uint8_t test = parseOptions(argc, argv);
|
|
if (test == 1){
|
|
// Enable the Debug Mode.
|
|
debugEnable = 1;
|
|
} else if (test == 2){
|
|
// User asked for help or gave a bad option, don't execute.
|
|
return 1;
|
|
}
|
|
if (optind < argc) {
|
|
programFile = argv[optind];
|
|
optind++;
|
|
} else {
|
|
fprintf(stderr, "Error: No binary file specified.\n");
|
|
printHelp(argv[0]);
|
|
return 1;
|
|
}
|
|
if (optind < argc) {
|
|
fprintf(stderr, "Error: Unexpected argument: %s\n", argv[optind]);
|
|
return 1;
|
|
}
|
|
if (loadFile(programFile, Program, Data)) {
|
|
fprintf(stderr, "Error: Couldn't read file: %s\n", programFile);
|
|
return 1;
|
|
}
|
|
CPURegisters cpu;
|
|
initializeCPU(&cpu, Program, Data);
|
|
if(debugEnable) {
|
|
printRegisters(&cpu, Program, Data);
|
|
}
|
|
while (!(cpu.Status & 0x80)) {
|
|
executeOperation(cpu.Program[cpu.ProgramCounter], &cpu);
|
|
cpu.ProgramCounter++;
|
|
cycleCount++;
|
|
if (debugEnable) {
|
|
getchar();
|
|
printRegisters(&cpu, Program, Data);
|
|
printf("Cycle: %u\n", cycleCount);
|
|
}
|
|
}
|
|
printf("Execution halted after %u cycles.\n", cycleCount);
|
|
}
|