Function LoadBIOS

pcsx2/ps2/BiosTools.cpp:317–369

Loads the configured bios rom file into PS2 memory. PS2 memory must be allocated prior to this method being called. Remarks: This function does not fail if rom1 or rom2 files are missing, since none are explicitly required for most emulation tasks. Exceptions: BadStream - Thrown if the primary bios file (usually .bin) is not found, corrupted, etc.

//   BadStream - Thrown if the primary bios file (usually .bin) is not found, corrupted, etc.
//
bool LoadBIOS()
{
	pxAssertMsg(eeMem->ROM, "PS2 system memory has not been initialized yet.");

	std::string path = EmuConfig.FullpathToBios();
	if (path.empty() || !FileSystem::FileExists(path.c_str()))
	{
		if (!path.empty())
		{
			Console.Warning("Configured BIOS '%s' does not exist, trying to find an alternative.",
				EmuConfig.BaseFilenames.Bios.c_str());
		}

		path = FindBiosImage();
		if (path.empty())
			return false;
	}

	auto fp = FileSystem::OpenManagedCFile(path.c_str(), "rb");
	if (!fp)
		return false;

	const s64 filesize = FileSystem::FSize64(fp.get());
	if (filesize <= 0)
		return false;

	LoadBiosVersion(fp.get(), BiosVersion, BiosDescription, BiosRegion, BiosZone, BiosSerial);

	BiosRom.resize(Ps2MemSize::Rom);

	if (FileSystem::FSeek64(fp.get(), 0, SEEK_SET) ||
		std::fread(BiosRom.data(), static_cast<size_t>(std::min<s64>(Ps2MemSize::Rom, filesize)), 1, fp.get()) != 1)
	{
		return false;
	}

	// If file is less than 2mb it doesn't have an OSD (Devel consoles)
	// So skip HLEing OSDSys Param stuff
	if (filesize < 2465792)
		NoOSD = true;
	else
		NoOSD = false;

	BiosChecksum = 0;
	ChecksumIt(BiosChecksum, 0, Ps2MemSize::Rom);
	BiosPath = std::move(path);

	//injectIRX("host.irx");	//not fully tested; still buggy

	LoadExtraRom("rom1", Ps2MemSize::Rom, Ps2MemSize::Rom1);
	LoadExtraRom("rom2", Ps2MemSize::Rom + Ps2MemSize::Rom1, Ps2MemSize::Rom2);
	return true;
}

void CopyBIOSToMemory()
{