Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Improved Trident TVGA CRTC emulation, Windows NT no longer detects as ET4000.

Browse source
This commit is contained in:
TomW 2014-07-27 14:41:18 +01:00
commit 83644002ae
1 changed files with 20 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/vid_tvga.c
View file

@ -30,6 +30,18 @@ typedef struct tvga_t
uint32_t vram_mask;
} tvga_t;
static uint8_t crtc_mask[0x40] =
{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x7f, 0xff, 0x3f, 0x7f, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xef,
0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
0x7f, 0x00, 0x00, 0x2f, 0x00, 0x00, 0x00, 0x03,
0x00, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
void tvga_out(uint16_t addr, uint8_t val, void *p)
{
tvga_t *tvga = (tvga_t *)p;
@ -100,6 +112,7 @@ void tvga_out(uint16_t addr, uint8_t val, void *p)
case 0x3D5:
if (svga->crtcreg <= 7 && svga->crtc[0x11] & 0x80) return;
old = svga->crtc[svga->crtcreg];
val &= crtc_mask[svga->crtcreg];
svga->crtc[svga->crtcreg] = val;
// if (svga->crtcreg != 0xC && svga->crtcreg != 0xE && svga->crtcreg != 0xF) pclog("CRTC R%02X = %02X %04X:%04X\n", svga->crtcreg, val, CS, pc);
if (old != val)
@ -170,12 +183,19 @@ uint8_t tvga_in(uint16_t addr, void *p)
if (tvga->oldmode) return tvga->oldctrl2;
return tvga->newctrl2;
}
if ((svga->seqaddr & 0xf) == 0xe)
{
if (tvga->oldmode)
return tvga->oldctrl1;
}
break;
case 0x3C6: case 0x3C7: case 0x3C8: case 0x3C9:
return tkd8001_ramdac_in(addr, &tvga->ramdac, svga);
case 0x3D4:
return svga->crtcreg;
case 0x3D5:
if (svga->crtcreg > 0x18 && svga->crtcreg < 0x1e)
return 0xff;
return svga->crtc[svga->crtcreg];
case 0x3d8:
return tvga->tvga_3d8;