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Sierra RAMDAC now correctly ignores writes of 0xFF to the command register;

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BT485 dummy code now passes reads and writes to the generic SVGA handler;
Minor S3 changes;
ATI Mach64/GX now has an 8 MB RAM option.
This commit is contained in:
OBattler
2016-07-25 01:15:51 +02:00
parent 9190c42123
commit ff7e0880d1
5 changed files with 22 additions and 19 deletions
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17
src/vid_unk_ramdac.c
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@@ -10,7 +10,7 @@
void unk_ramdac_out(uint16_t addr, uint8_t val, unk_ramdac_t *ramdac, svga_t *svga)
{
//pclog("OUT RAMDAC %04X %02X\n",addr,val);
// pclog("OUT RAMDAC %04X %02X\n",addr,val);
int oldbpp = 0;
switch (addr)
{
@@ -18,6 +18,7 @@ void unk_ramdac_out(uint16_t addr, uint8_t val, unk_ramdac_t *ramdac, svga_t *sv
if (ramdac->state == 4)
{
ramdac->state = 0;
if (val == 0xFF) break;
ramdac->ctrl = val;
#if 0
switch ((val&1)|((val&0xE0)>>4))
@@ -45,8 +46,12 @@ void unk_ramdac_out(uint16_t addr, uint8_t val, unk_ramdac_t *ramdac, svga_t *sv
case 0:
svga->bpp = 8;
break;
case 2: case 3:
svga->bpp = 24;
case 2: case 3: case 7:
switch(val & 0x20)
{
case 0x00: svga->bpp = 32; break;
case 0x20: svga->bpp = 24; break;
}
break;
case 4: case 5:
svga->bpp = 15;
@@ -54,14 +59,14 @@ void unk_ramdac_out(uint16_t addr, uint8_t val, unk_ramdac_t *ramdac, svga_t *sv
case 6:
svga->bpp = 16;
break;
case 1: case 7: default:
case 1: default:
break;
}
if (oldbpp != svga->bpp)
{
svga_recalctimings(svga);
pclog("unk_ramdac: set to %02X, %i bpp\n", (val&1)|((val&0xE0)>>4), svga->bpp);
}
// pclog("unk_ramdac: set to %02X (b5 = %i), %i bpp\n", (val&1)|((val&0xC0)>>5), val & 0x20 ? 1 : 0, svga->bpp);
return;
}
ramdac->state = 0;
@@ -75,7 +80,7 @@ void unk_ramdac_out(uint16_t addr, uint8_t val, unk_ramdac_t *ramdac, svga_t *sv
uint8_t unk_ramdac_in(uint16_t addr, unk_ramdac_t *ramdac, svga_t *svga)
{
//pclog("IN RAMDAC %04X\n",addr);
// pclog("IN RAMDAC %04X\n",addr);
switch (addr)
{
case 0x3C6: