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#include "z80inst.h"
#include "z80_to_x86.h"
#include "mem.h"
#include "vdp.h"
#include <stdio.h>
#include <stdlib.h>
uint8_t z80_ram[0x2000];
uint16_t cart[0x200000];
#define MCLKS_PER_Z80 15
//TODO: Figure out the exact value for this
#define MCLKS_PER_FRAME (MCLKS_LINE*262)
#define VINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_Z80)
#define CYCLE_NEVER 0xFFFFFFFF
int main(int argc, char ** argv)
{
long filesize;
uint8_t *filebuf;
x86_z80_options opts;
z80_context context;
if (argc < 2) {
fputs("usage: transz80 zrom [cartrom]\n", stderr);
exit(1);
}
FILE * f = fopen(argv[1], "rb");
if (!f) {
fprintf(stderr, "unable to open file %s\n", argv[2]);
exit(1);
}
fseek(f, 0, SEEK_END);
filesize = ftell(f);
fseek(f, 0, SEEK_SET);
fread(z80_ram, 1, filesize < sizeof(z80_ram) ? filesize : sizeof(z80_ram), f);
fclose(f);
if (argc > 2) {
f = fopen(argv[2], "rb");
if (!f) {
fprintf(stderr, "unable to open file %s\n", argv[2]);
exit(1);
}
fseek(f, 0, SEEK_END);
filesize = ftell(f);
fseek(f, 0, SEEK_SET);
fread(cart, 1, filesize < sizeof(cart) ? filesize : sizeof(cart), f);
fclose(f);
for(unsigned short * cur = cart; cur - cart < (filesize/2); ++cur)
{
*cur = (*cur >> 8) | (*cur << 8);
}
}
init_x86_z80_opts(&opts);
init_z80_context(&context, &opts);
//Z80 RAM
context.mem_pointers[0] = z80_ram;
context.sync_cycle = context.target_cycle = MCLKS_PER_FRAME/MCLKS_PER_Z80;
context.int_cycle = CYCLE_NEVER;
//cartridge/bank
context.mem_pointers[1] = context.mem_pointers[2] = (uint8_t *)cart;
z80_reset(&context);
for(;;)
{
z80_run(&context);
if (context.current_cycle >= MCLKS_PER_FRAME/MCLKS_PER_Z80) {
context.current_cycle -= MCLKS_PER_FRAME/MCLKS_PER_Z80;
}
if (context.current_cycle < VINT_CYCLE && context.iff1) {
context.int_cycle = VINT_CYCLE;
}
context.target_cycle = context.sync_cycle < context.int_cycle ? context.sync_cycle : context.int_cycle;
}
return 0;
}
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