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Implemented preliminary S3 ViRGE 2D blitter emulation.

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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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9
src/um8881f.c
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@ -10,28 +10,29 @@ static uint8_t card_18[256];
void um8881f_write(int func, int addr, uint8_t val, void *priv)
{
// pclog("um8881f_write : addr=%02x val=%02x %04x:%04x\n", addr, val, CS, pc);
if (addr == 0x54)
{
if ((card_16[0x54] ^ val) & 0x01)
/* if ((card_16[0x54] ^ val) & 0x01)
{
if (val & 1)
mem_bios_set_state(0xe0000, 0x10000, 1, 1);
else
mem_bios_set_state(0xe0000, 0x10000, 0, 0);
}
}*/
flushmmucache_nopc();
}
if (addr == 0x55)
{
if ((card_16[0x55] ^ val) & 0xc0)
{
switch (val & 0xc0)
/* switch (val & 0xc0)
{
case 0x00: mem_bios_set_state(0xf0000, 0x10000, 0, 1); break;
case 0x40: mem_bios_set_state(0xf0000, 0x10000, 0, 0); break;
case 0x80: mem_bios_set_state(0xf0000, 0x10000, 1, 1); break;
case 0xc0: mem_bios_set_state(0xf0000, 0x10000, 1, 0); break;
}
}*/
shadowbios = val & 0x80;
shadowbios_write = !(val & 0x40);
flushmmucache_nopc();