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Implemented preliminary S3 ViRGE 2D blitter emulation.

Browse source 
Misc ViRGE fixes.
Changes to memory mapping.
Changes to PCI handling.
Disabled 'AMI WinBIOS 486 PCI' due to incomplete chipset emulation.
Invalid GUS register reads no longer kill the emulator.
This commit is contained in:
TomW 2014-03-20 14:03:55 +00:00
commit 2ca4ead570
49 changed files with 2078 additions and 700 deletions
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96
src/rom.c
View file

@ -1,5 +1,7 @@
#include <stdlib.h>
#include <stdio.h>
#include "ibm.h"
#include "mem.h"
#include "rom.h"
FILE *romfopen(char *fn, char *mode)
@ -27,3 +29,97 @@ int rom_present(char *fn)
}
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;
}