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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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25
src/vid_ega.c
View file

@ -4,6 +4,7 @@
#include "device.h"
#include "io.h"
#include "mem.h"
#include "rom.h"
#include "timer.h"
#include "video.h"
#include "vid_ega.h"
@ -810,15 +811,35 @@ void *ega_standalone_init()
int c, d, e;
ega_t *ega = malloc(sizeof(ega_t));
memset(ega, 0, sizeof(ega_t));
rom_init(&ega->bios_rom, "roms/ibm_6277356_ega_card_u44_27128.bin", 0xc0000, 0x8000, 0x7fff, 0, 0);
if (ega->bios_rom.rom[0x3ffe] == 0xaa && ega->bios_rom.rom[0x3fff] == 0x55)
{
int c;
pclog("Read EGA ROM in reverse\n");
for (c = 0; c < 0x2000; c++)
{
uint8_t temp = ega->bios_rom.rom[c];
ega->bios_rom.rom[c] = ega->bios_rom.rom[0x3fff - c];
ega->bios_rom.rom[0x3fff - c] = temp;
}
}
ega_init(ega);
mem_mapping_add(&ega->mapping, 0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, ega);
mem_mapping_add(&ega->mapping, 0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, NULL, 0, ega);
timer_add(ega_poll, &ega->vidtime, TIMER_ALWAYS_ENABLED, ega);
io_sethandler(0x03a0, 0x0040, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
return ega;
}
static int ega_standalone_available()
{
return rom_present("roms/ibm_6277356_ega_card_u44_27128.bin");
}
void ega_close(void *p)
{
ega_t *ega = (ega_t *)p;
@ -840,7 +861,7 @@ device_t ega_device =
0,
ega_standalone_init,
ega_close,
NULL,
ega_standalone_available,
ega_speed_changed,
NULL,
NULL