Function UpdatePaging

source/Memory.cpp:1331–1482

}

static void UpdatePaging(BOOL initialize)
{
	if (initialize)
	{
		// Importantly from:
		// . MemReset() -> ResetPaging(TRUE)
		// . MemInitializeFromSnapshot() -> MemUpdatePaging(TRUE);
		g_isMemCacheValid = !(IsAppleIIe(GetApple2Type()) && (GetCardMgr().QueryAux() == CT_Empty || GetCardMgr().QueryAux() == CT_80Col));
		if (g_forceAltCpuEmulation)
			g_isMemCacheValid = false;
	}

	modechanging = 0;

	// SAVE THE CURRENT PAGING SHADOW TABLE
	LPBYTE oldshadow[256];
	if (!initialize)
		memcpy(oldshadow,memshadow,256*sizeof(LPBYTE));

	// UPDATE THE PAGING TABLES BASED ON THE NEW PAGING SWITCH VALUES
	UINT loop;
	if (initialize)
	{
		for (loop = 0x00; loop < 0xC0; loop++)
			memwrite[loop] = mem+(loop << 8);

		for (loop = 0xC0; loop < 0xD0; loop++)
			memwrite[loop] = NULL;
	}

	for (loop = 0x00; loop < 0x02; loop++)
	{
		memshadow[loop] = SW_ALTZP ? memaux + (loop << 8) : memmain + (loop << 8);

		// re-init this, since for //e aux slot 80-col(1KiB) card, this can change
		memwrite[loop] = mem + (loop << 8);
	}

	for (loop = 0x02; loop < 0xC0; loop++)
	{
		memshadow[loop] = SW_AUXREAD ? memaux+(loop << 8)
			: memmain+(loop << 8);

		memwrite[loop]  = ((SW_AUXREAD != 0) == (SW_AUXWRITE != 0))
			? mem+(loop << 8)
			: SW_AUXWRITE	? memaux+(loop << 8)
							: memmain+(loop << 8);
	}

	for (loop = 0xC0; loop < 0xC8; loop++)
	{
		memdirty[loop] = 0;	// mem(cache) can't be dirty for ROM (but STA $Csnn will set the dirty flag)
		const UINT uSlotOffset = (loop & 0x0f) * 0x100;
		if (loop == 0xC3)
			memshadow[loop] = (SW_SLOTC3ROM && !SW_INTCXROM)	? pCxRomPeripheral+uSlotOffset	// C300..C3FF - Slot 3 ROM (all 0x00's)
																: pCxRomInternal+uSlotOffset;	// C300..C3FF - Internal ROM
		else
			memshadow[loop] = !SW_INTCXROM	? pCxRomPeripheral+uSlotOffset						// C000..C7FF - SSC/Disk][/etc