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

Enabled write to CRTC R7 bit 4 when protection is enabled - fixes scrolling on DOS/V 6.2.

Browse source
This commit is contained in:
TomW 2014-11-04 20:14:50 +00:00
commit 6a72839c59
13 changed files with 51 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/vid_paradise.c
View file

@ -114,8 +114,10 @@ void paradise_out(uint16_t addr, uint8_t val, void *p)
svga->crtcreg = val & 0x3f;
return;
case 0x3D5:
if (svga->crtcreg <= 7 && svga->crtc[0x11] & 0x80)
return;
if ((svga->crtcreg < 7) && (svga->crtc[0x11] & 0x80))
return;
if ((svga->crtcreg == 7) && (svga->crtc[0x11] & 0x80))
val = (svga->crtc[7] & ~0x10) | (val & 0x10);
if (svga->crtcreg > 0x29 && (svga->crtc[0x29] & 7) != 5)
return;
if (svga->crtcreg >= 0x31 && svga->crtcreg <= 0x37)