Function NTSC_SetVideoMode

source/NTSC.cpp:1996–2229

===========================================================================

//===========================================================================
void NTSC_SetVideoMode( uint32_t uVideoModeFlags, bool bDelay/*=false*/ )
{
	g_uNewVideoModeFlags = uVideoModeFlags;

	if (uVideoModeFlags & VF_SHR)
	{
		g_pFuncUpdateGraphicsScreen = updateScreenSHR;
		g_pFuncUpdateTextScreen = updateScreenSHR;
		return;
	}

	if (g_pFuncUpdateGraphicsScreen == updateScreenSHR && !(uVideoModeFlags & VF_SHR))
	{
		// Was SHR mode, so clear the framebuffer to remove any SHR residue in the borders
		GetVideo().ClearFrameBuffer();
	}

	if (bDelay && !g_bFullSpeed)
	{
		// (GH#670) NB. if g_bFullSpeed then NTSC_VideoUpdateCycles() won't be called on the next 6502 opcode.
		//  - Instead it's called when !g_bFullSpeed (eg. drive motor off), then the stale g_uNewVideoModeFlags will get used for NTSC_SetVideoMode()!
		g_bDelayVideoMode = true;
		return;
	}

	g_nVideoMixed   = uVideoModeFlags & VF_MIXED;
	g_nVideoCharSet = GetVideo().VideoGetSWAltCharSet() ? 1 : 0;

	RGB_DisableTextFB();

	g_nTextPage  = 1;
	g_nHiresPage = 1;
	if (uVideoModeFlags & VF_PAGE2)
	{
		// Apple IIe, Technical Notes, #3: Double High-Resolution Graphics
		// 80STORE must be OFF to display page 2
		if (0 == (uVideoModeFlags & VF_80STORE))
		{
			g_nTextPage  = 2;
			g_nHiresPage = 2;
		}
	}

	if( uVideoModeFlags & VF_PAGE0)   // Pseudo page ($0000)
	{
		g_nHiresPage = 0;
	}

	if( uVideoModeFlags & VF_PAGE3)   // Pseudo page ($6000)
	{
		g_nHiresPage = 3;
	}

	if( uVideoModeFlags & VF_PAGE4)   // Pseudo page ($8000)
	{
		g_nHiresPage = 4;
	}