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

Fix 8-bit RAMDAC palette handling.

Browse source
This commit is contained in:
SarahW 2017-11-05 15:42:04 +00:00
commit b97d525e0c
1 changed files with 12 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/vid_svga.c
View file

@ -151,9 +151,9 @@ void svga_out(uint16_t addr, uint8_t val, void *p)
svga->dac_pos++; svga->dac_pos++;
break; break;
case 2: case 2:
svga->vgapal[svga->dac_write].r = svga->dac_r & 0x3f; svga->vgapal[svga->dac_write].r = svga->dac_r;
svga->vgapal[svga->dac_write].g = svga->dac_g & 0x3f; svga->vgapal[svga->dac_write].g = svga->dac_g;
svga->vgapal[svga->dac_write].b = val & 0x3f; svga->vgapal[svga->dac_write].b = val;
if (svga->ramdac_type == RAMDAC_8BIT) if (svga->ramdac_type == RAMDAC_8BIT)
svga->pallook[svga->dac_write] = makecol32(svga->vgapal[svga->dac_write].r, svga->vgapal[svga->dac_write].g, svga->vgapal[svga->dac_write].b); svga->pallook[svga->dac_write] = makecol32(svga->vgapal[svga->dac_write].r, svga->vgapal[svga->dac_write].g, svga->vgapal[svga->dac_write].b);
else else
@ -243,14 +243,20 @@ uint8_t svga_in(uint16_t addr, void *p)
{ {
case 0: case 0:
svga->dac_pos++; svga->dac_pos++;
return svga->vgapal[svga->dac_read].r; if (svga->ramdac_type == RAMDAC_8BIT)
return svga->vgapal[svga->dac_read].r;
return svga->vgapal[svga->dac_read].r & 0x3f;
case 1: case 1:
svga->dac_pos++; svga->dac_pos++;
return svga->vgapal[svga->dac_read].g; if (svga->ramdac_type == RAMDAC_8BIT)
return svga->vgapal[svga->dac_read].g;
return svga->vgapal[svga->dac_read].g & 0x3f;
case 2: case 2:
svga->dac_pos=0; svga->dac_pos=0;
svga->dac_read = (svga->dac_read + 1) & 255; svga->dac_read = (svga->dac_read + 1) & 255;
return svga->vgapal[(svga->dac_read - 1) & 255].b; if (svga->ramdac_type == RAMDAC_8BIT)
return svga->vgapal[(svga->dac_read - 1) & 255].b;
return svga->vgapal[(svga->dac_read - 1) & 255].b & 0x3f;
} }
break; break;
case 0x3CC: case 0x3CC: