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Don't delay a PAGE1/2 video mode change (#656)
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@ -652,6 +652,8 @@ BYTE VideoSetMode(WORD, WORD address, BYTE write, BYTE, ULONG uExecutedCycles)
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{
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address &= 0xFF;
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const uint32_t oldVideoMode = g_uVideoMode;
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switch (address)
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{
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case 0x00: g_uVideoMode &= ~VF_80STORE; break;
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@ -675,7 +677,11 @@ BYTE VideoSetMode(WORD, WORD address, BYTE write, BYTE, ULONG uExecutedCycles)
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if (!IS_APPLE2)
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RGB_SetVideoMode(address);
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NTSC_SetVideoMode( g_uVideoMode, true );
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bool delay = true;
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if ((oldVideoMode ^ g_uVideoMode) & VF_PAGE2)
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delay = false; // PAGE2 flag changed state, so no 1 cycle delay (GH#656)
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NTSC_SetVideoMode( g_uVideoMode, delay );
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return MemReadFloatingBus(uExecutedCycles);
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}
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