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Fixed IM1024 timings calculation.

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This commit is contained in:
OBattler
2022-10-22 01:29:18 +02:00
parent 7c0b0f94f7
commit a64be0bfea
1 changed files with 9 additions and 4 deletions
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13
src/video/vid_pgc.c
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@@ -2131,12 +2131,17 @@ void
pgc_recalctimings(pgc_t *dev)
{
double disptime, _dispontime, _dispofftime;
double pixel_clock = (cpuclock * (double) (1ull << 32)) / (dev->cga_selected ? 25175000.0 : dev->native_pixel_clock);
double pixel_clock = (cpuclock / (dev->cga_selected ? 25175000.0 : dev->native_pixel_clock) * (double) (1ull << 32));
uint8_t crtc0 = 97, crtc1 = 80; /* Values from MDA, taken from there due to the 25 MHz refresh rate. */
/* Multiply pixel clock by 8. */
pixel_clock *= 8.0;
/* Use a fixed 640x400 display. */
disptime = dev->screenw + 11;
_dispontime = dev->screenw * pixel_clock;
_dispofftime = (disptime - dev->screenw) * pixel_clock;
disptime = crtc0 + 1;
_dispontime = crtc1;
_dispofftime = disptime - _dispontime;
_dispontime *= pixel_clock;
_dispofftime *= pixel_clock;
dev->dispontime = (uint64_t) (_dispontime);
dev->dispofftime = (uint64_t) (_dispofftime);
}