Function MemInitializeCustomROM

source/Memory.cpp:2173–2213

}

void MemInitializeCustomROM(void)
{
	if (g_hCustomRom == INVALID_HANDLE_VALUE)
		return;

	SetFilePointer(g_hCustomRom, 0, NULL, FILE_BEGIN);
	DWORD uNumBytesRead;
	BOOL bRes = TRUE;

	if (GetFileSize(g_hCustomRom, NULL) == Apple2eRomSize)
	{
		std::vector<BYTE> oldRomC0(pCxRomInternal, pCxRomInternal+CxRomSize);	// range ctor: [first,last)
		bRes = ReadFile(g_hCustomRom, pCxRomInternal, CxRomSize, &uNumBytesRead, NULL);
		if (uNumBytesRead != CxRomSize)
		{
			memcpy(pCxRomInternal, &oldRomC0[0], CxRomSize);	// ROM at $C000...$CFFF
			bRes = FALSE;
		}
	}

	if (bRes)
	{
		std::vector<BYTE> oldRom(memrom, memrom+Apple2RomSize);	// range ctor: [first,last)
		bRes = ReadFile(g_hCustomRom, memrom, Apple2RomSize, &uNumBytesRead, NULL);
		if (uNumBytesRead != Apple2RomSize)
		{
			memcpy(memrom, &oldRom[0], Apple2RomSize);	// ROM at $D000...$FFFF
			bRes = FALSE;
		}
	}

	// NB. If succeeded, then keep g_hCustomRom handle open - so that any next restart can load it again

	if (!bRes)
	{
		GetFrame().FrameMessageBox( "Failed to read custom rom", "AppleWin Error", MB_OK );
		CloseHandle(g_hCustomRom);
		g_hCustomRom = INVALID_HANDLE_VALUE;
		// Failed, so use default rom...
	}
}

// Called by:
// . MemInitialize()