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Clamp SVGA display on/off timings to a minimum of 1 usec. Fixes hang on Windows XP boot with ViRGE/DX.

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This commit is contained in:
SarahW 2018-08-08 22:15:21 +01:00
commit 2783471daa
1 changed files with 4 additions and 0 deletions
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4
src/vid_svga.c
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@ -435,6 +435,10 @@ void svga_recalctimings(svga_t *svga)
svga->dispontime = (uint64_t)_dispontime;
svga->dispofftime = (uint64_t)_dispofftime;
if (svga->dispontime < TIMER_USEC)
svga->dispontime = TIMER_USEC;
if (svga->dispofftime < TIMER_USEC)
svga->dispofftime = TIMER_USEC;
/* printf("SVGA horiz total %i display end %i vidclock %f\n",svga->crtc[0],svga->crtc[1],svga->clock);
printf("SVGA vert total %i display end %i max row %i vsync %i\n",svga->vtotal,svga->dispend,(svga->crtc[9]&31)+1,svga->vsyncstart);
printf("total %f on %i cycles off %i cycles frame %i sec %i %02X\n",disptime*crtcconst,svga->dispontime,svga->dispofftime,(svga->dispontime+svga->dispofftime)*svga->vtotal,(svga->dispontime+svga->dispofftime)*svga->vtotal*70,svga->seqregs[1]);