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/*
* Copyright (C) 2025 dwlr <dweller@cabin.digital>
*
* BSD 3-Clause License (BSD-3-Clause)
* See LICENSE for details
*/
#define _DEFAULT_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <time.h>
#include <stdarg.h>
#include <endian.h>
#include "bits.c"
#include "log.c"
#include "chip8.c"
#include "meta/disasm.c"
#include "meta/exec.c"
int main(int argc, char** argv)
{
u64 sz = 0;
FILE* f = NULL;
chip8 c8 = {0};
srand(time(NULL));
c8_reset(&c8);
if(argc > 1)
{
u64 got = 0;
f = fopen(argv[1], "r");
if(!f) return 1;
fseek(f, 0, SEEK_END);
sz = (u64)ftell(f);
rewind(f);
if(sz >= (sizeof(c8.RAM) - 512)) return 2;
got = fread(c8.RAM + C8_RESET_VECTOR, 1, sz, f);
if(got != sz) return 3;
fclose(f);
}
else
{
c8.RAM[C8_RESET_VECTOR + iota] = 0x60;
c8.RAM[C8_RESET_VECTOR + iota] = 0x04;
c8.RAM[C8_RESET_VECTOR + iota] = 0x61;
c8.RAM[C8_RESET_VECTOR + iota] = 0x03;
c8.RAM[C8_RESET_VECTOR + iota] = 0x72;
c8.RAM[C8_RESET_VECTOR + iota] = 0x01;
c8.RAM[C8_RESET_VECTOR + iota] = 0x80;
c8.RAM[C8_RESET_VECTOR + iota] = 0x14;
c8.RAM[C8_RESET_VECTOR + iota] = 0x30;
c8.RAM[C8_RESET_VECTOR + iota] = 0x10;
c8.RAM[C8_RESET_VECTOR + iota] = 0x12;
c8.RAM[C8_RESET_VECTOR + iota] = 0x04;
sz = iota;
}
printf("Disasm:\n");
{
u64 i;
char buf[512] = {0};
for(i = 0; i < sz; i += 2)
{
u16 pc = C8_RESET_VECTOR + i;
c8_disasm(c8.RAM, pc, buf);
printf("%04X: %s\n", pc, buf);
}
}
printf("\nExec:\n");
while(c8.running)
{
char buf[512] = {0};
c8_disasm(c8.RAM, c8.pc, buf);
printf("%04X: %s\n", c8.pc, buf);
c8_exec(c8.RAM, c8.pc, &c8);
c8_dump_state(&c8, false);
}
return 0;
}
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