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Rework bit depth selection on SDAC to add a few missing cases.

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This commit is contained in:
SarahW 2019-05-12 18:00:48 +01:00
commit 388229aeb5
1 changed files with 24 additions and 7 deletions
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31
src/vid_sdac_ramdac.c
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@ -9,14 +9,31 @@ static void sdac_control_write(sdac_ramdac_t *ramdac, svga_t *svga, uint8_t val)
{
ramdac->command = val;
// pclog("RAMDAC command reg now %02X\n", val);
switch (val >> 4)
switch (val & 0xf0)
{
case 0x2: case 0x3: case 0xa: svga->bpp = 15; break;
case 0x4: case 0xe: svga->bpp = 24; break;
case 0x5: case 0x6: case 0xc: svga->bpp = 16; break;
case 0x7: svga->bpp = 32; break;
case 0: case 1: default: svga->bpp = 8; break;
case 0x00: case 0x10:
svga->bpp = 8;
break;
case 0x20: case 0x30: case 0x80: case 0xa0:
svga->bpp = 15;
break;
case 0x50: case 0x60: case 0xc0:
svga->bpp = 16;
break;
case 0x40: case 0x90: case 0xe0:
svga->bpp = 24;
break;
case 0x70:
svga->bpp = 32;
break;
default:
svga->bpp = 8;
break;
}
}