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Assorted TGUI9440/96x0 fixes:

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Fixed the Win98 Trident PCI (and 9440 VLB) card accelerator pitch while maintaining compatibility with other OSes, despite being undocumented (this is at least an attempt to fix it properly based on the logs).
This commit is contained in:
TC1995
2023-08-23 19:58:18 +02:00
parent 2bff7c3910
commit e2fbf5df3f
1 changed files with 20 additions and 3 deletions
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23
src/video/vid_tgui9440.c
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@@ -628,6 +628,7 @@ void
tgui_recalctimings(svga_t *svga)
{
tgui_t *tgui = (tgui_t *) svga->priv;
uint8_t ger22lower = (tgui->accel.ger22 & 0xff);
uint8_t ger22upper = (tgui->accel.ger22 >> 8);
if (!svga->rowoffset)
@@ -750,7 +751,8 @@ tgui_recalctimings(svga_t *svga)
}
switch (svga->hdisp) {
case 640:
svga->rowoffset = 80;
if (!ger22lower)
svga->rowoffset = 80;
break;
}
}
@@ -1991,17 +1993,25 @@ tgui_accel_out(uint16_t addr, uint8_t val, void *priv)
break;
case 0x2123:
//pclog("Pitch IO23: val = %02x, rowoffset = %x, pitch = %d.\n", val, svga->rowoffset, tgui->accel.pitch);
tgui->accel.ger22 = (tgui->accel.ger22 & 0xff) | (val << 8);
if ((val & 0x80) || (((val & 0xc0) == 0x40)))
tgui->accel.pitch = svga->rowoffset << 3;
else if (tgui->accel.pitch <= 1024)
else if (tgui->accel.pitch <= 1024) {
tgui->accel.pitch = svga->rowoffset << 3;
if (!val)
tgui->accel.pitch = 1024;
}
if (tgui->accel.bpp == 1)
tgui->accel.pitch >>= 1;
else if (tgui->accel.bpp == 3)
tgui->accel.pitch >>= 2;
if (tgui->accel.pitch == 800)
tgui->accel.pitch += 32;
svga_recalctimings(svga);
break;
@@ -2631,17 +2641,24 @@ tgui_accel_write(uint32_t addr, uint8_t val, void *priv)
break;
case 0x23:
//pclog("Pitch MM23: val = %02x, rowoffset = %x, pitch = %d.\n", val, svga->rowoffset, tgui->accel.pitch);
tgui->accel.ger22 = (tgui->accel.ger22 & 0xff) | (val << 8);
if ((val & 0x80) || (((val & 0xc0) == 0x40)))
tgui->accel.pitch = svga->rowoffset << 3;
else if (tgui->accel.pitch <= 1024)
else if (tgui->accel.pitch <= 1024) {
tgui->accel.pitch = svga->rowoffset << 3;
if (!val)
tgui->accel.pitch = 1024;
}
if (tgui->accel.bpp == 1)
tgui->accel.pitch >>= 1;
else if (tgui->accel.bpp == 3)
tgui->accel.pitch >>= 2;
if (tgui->accel.pitch == 800)
tgui->accel.pitch += 32;
svga_recalctimings(svga);
break;