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Minor speed improvement for nVidia cards

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This commit is contained in:
Melissa Goad
2017-10-15 21:19:03 -05:00
parent fbd95451d2
commit 80c6a1c499
1 changed files with 30 additions and 22 deletions
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52
src/video/vid_nv_riva128.c
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@@ -2813,33 +2813,41 @@ void riva128_ptimer_tick(void *p)
svga->clock = cpuclock / freq;
}
freq = 13500000.0;
if(riva128->pramdac.m_m == 0) freq = 0;
else
if(riva128->card_id == 0x03)
{
freq = (freq * riva128->pramdac.m_n) / (1 << riva128->pramdac.m_p) / riva128->pramdac.m_m;
//pclog("RIVA 128 Memory clock is %f Hz\n", freq);
freq = 13500000.0;
if(riva128->pramdac.m_m == 0) freq = 0;
else
{
freq = (freq * riva128->pramdac.m_n) / (1 << riva128->pramdac.m_p) / riva128->pramdac.m_m;
//pclog("RIVA 128 Memory clock is %f Hz\n", freq);
}
riva128->mfreq = freq;
riva128->menable = 0;
riva128->mtime = (int)((TIMER_USEC * 1000000.0) / riva128->mfreq);
riva128->menable = 1;
}
else riva128->menable = 0;
riva128->mfreq = freq;
riva128->menable = 0;
riva128->mtime = (int)((TIMER_USEC * 1000000.0) / riva128->mfreq);
riva128->menable = 1;
freq = 13500000.0;
if(riva128->pramdac.nv_m == 0) freq = 0;
else
if(riva128->card_id >= 0x04)
{
freq = (freq * riva128->pramdac.nv_n) / (1 << riva128->pramdac.nv_p) / riva128->pramdac.nv_m;
//pclog("RIVA 128 Core clock is %f Hz\n", freq);
}
freq = 13500000.0;
riva128->nvfreq = freq;
riva128->nvenable = 0;
riva128->nvtime = (int)((TIMER_USEC * 1000000.0) / riva128->nvfreq);
riva128->nvenable = 1;
if(riva128->pramdac.nv_m == 0) freq = 0;
else
{
freq = (freq * riva128->pramdac.nv_n) / (1 << riva128->pramdac.nv_p) / riva128->pramdac.nv_m;
//pclog("RIVA 128 Core clock is %f Hz\n", freq);
}
riva128->nvfreq = freq;
riva128->nvenable = 0;
riva128->nvtime = (int)((TIMER_USEC * 1000000.0) / riva128->nvfreq);
riva128->nvenable = 1;
}
else riva128->nvenable = 0;
}