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Initial submission of the PCem-Experimental source code.

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This commit is contained in:
OBattler
2016-06-26 00:34:39 +02:00
parent 09d7c4384f
commit fd2a5bc9f5
610 changed files with 184352 additions and 0 deletions
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125
src/rom.c Normal file
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#include <stdlib.h>
#include <stdio.h>
#include "ibm.h"
#include "mem.h"
#include "rom.h"
FILE *romfopen(char *fn, char *mode)
{
char s[512];
strcpy(s, pcempath);
put_backslash(s);
strcat(s, fn);
return fopen(s, mode);
}
int rom_present(char *fn)
{
FILE *f;
char s[512];
strcpy(s, pcempath);
put_backslash(s);
strcat(s, fn);
f = fopen(s, "rb");
if (f)
{
fclose(f);
return 1;
}
return 0;
}
static uint8_t rom_read(uint32_t addr, void *p)
{
rom_t *rom = (rom_t *)p;
// pclog("rom_read : %08x %08x %02x\n", addr, rom->mask, rom->rom[addr & rom->mask]);
return rom->rom[addr & rom->mask];
}
uint16_t rom_readw(uint32_t addr, void *p)
{
rom_t *rom = (rom_t *)p;
// pclog("rom_readw: %08x %08x %04x\n", addr, rom->mask, *(uint16_t *)&rom->rom[addr & rom->mask]);
return *(uint16_t *)&rom->rom[addr & rom->mask];
}
uint32_t rom_readl(uint32_t addr, void *p)
{
rom_t *rom = (rom_t *)p;
// pclog("rom_readl: %08x %08x %08x\n", addr, rom->mask, *(uint32_t *)&rom->rom[addr & rom->mask]);
return *(uint32_t *)&rom->rom[addr & rom->mask];
}
int rom_init(rom_t *rom, char *fn, uint32_t address, int size, int mask, int file_offset, uint32_t flags)
{
FILE *f = romfopen(fn, "rb");
if (!f)
{
pclog("ROM image not found : %s\n", fn);
return -1;
}
rom->rom = malloc(size);
fseek(f, file_offset, SEEK_SET);
fread(rom->rom, size, 1, f);
fclose(f);
rom->mask = mask;
mem_mapping_add(&rom->mapping, address, size, rom_read,
rom_readw,
rom_readl,
mem_write_null,
mem_write_nullw,
mem_write_nulll,
rom->rom,
flags,
rom);
return 0;
}
int rom_init_interleaved(rom_t *rom, char *fn_low, char *fn_high, uint32_t address, int size, int mask, int file_offset, uint32_t flags)
{
FILE *f_low = romfopen(fn_low, "rb");
FILE *f_high = romfopen(fn_high, "rb");
int c;
if (!f_low || !f_high)
{
if (!f_low)
pclog("ROM image not found : %s\n", fn_low);
else
fclose(f_low);
if (!f_high)
pclog("ROM image not found : %s\n", fn_high);
else
fclose(f_high);
return -1;
}
rom->rom = malloc(size);
fseek(f_low, file_offset, SEEK_SET);
fseek(f_high, file_offset, SEEK_SET);
for (c = 0; c < size; c += 2)
{
rom->rom[c] = getc(f_low);
rom->rom[c + 1] = getc(f_high);
}
fclose(f_high);
fclose(f_low);
rom->mask = mask;
mem_mapping_add(&rom->mapping, address, size, rom_read,
rom_readw,
rom_readl,
mem_write_null,
mem_write_nullw,
mem_write_nulll,
rom->rom,
flags,
rom);
return 0;
}