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Support floating-bus in full-speed mode (#508, #519, #532)

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This commit is contained in:
tomcw
2018-02-02 20:19:48 +00:00
parent 62b8b5ac14
commit 2c8f5ce864
5 changed files with 28 additions and 10 deletions
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source/NTSC.cpp
+14 -3
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@@ -1430,10 +1430,21 @@ uint32_t*NTSC_VideoGetChromaTable( bool bHueTypeMonochrome, bool bMonitorTypeCol
}
//===========================================================================
// NB. NTSC video-scanner doesn't get updated during full-speed, so video-dependent Apple II code can hang
uint16_t NTSC_VideoGetScannerAddress ( void )
void NTSC_VideoClockResync(const DWORD dwCyclesThisFrame)
{
g_nVideoClockVert = (uint16_t) (dwCyclesThisFrame / VIDEO_SCANNER_MAX_HORZ) % VIDEO_SCANNER_MAX_VERT;
g_nVideoClockHorz = (uint16_t) (dwCyclesThisFrame % VIDEO_SCANNER_MAX_HORZ);
}
//===========================================================================
uint16_t NTSC_VideoGetScannerAddress ( const ULONG uExecutedCycles )
{
if (g_bFullSpeed)
{
// Ensure that NTSC video-scanner gets updated during full-speed, so video-dependent Apple II code doesn't hang
NTSC_VideoClockResync( CpuGetCyclesThisVideoFrame(uExecutedCycles) );
}
const uint16_t currVideoClockVert = g_nVideoClockVert;
const uint16_t currVideoClockHorz = g_nVideoClockHorz;