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Don't delay a PAGE1/2 video mode change (#656)

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This commit is contained in:
tomcw 2019-06-24 22:05:32 +01:00
parent 51802257aa
commit dbcb789442
1 changed files with 7 additions and 1 deletions
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8
source/Video.cpp
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@ -652,6 +652,8 @@ BYTE VideoSetMode(WORD, WORD address, BYTE write, BYTE, ULONG uExecutedCycles)
{
address &= 0xFF;
const uint32_t oldVideoMode = g_uVideoMode;
switch (address)
{
case 0x00: g_uVideoMode &= ~VF_80STORE; break;
@ -675,7 +677,11 @@ BYTE VideoSetMode(WORD, WORD address, BYTE write, BYTE, ULONG uExecutedCycles)
if (!IS_APPLE2)
RGB_SetVideoMode(address);
NTSC_SetVideoMode( g_uVideoMode, true );
bool delay = true;
if ((oldVideoMode ^ g_uVideoMode) & VF_PAGE2)
delay = false; // PAGE2 flag changed state, so no 1 cycle delay (GH#656)
NTSC_SetVideoMode( g_uVideoMode, delay );
return MemReadFloatingBus(uExecutedCycles);
}