The 70012 (and later v2.00+ versions) is generally preferred over very early versions like the SCPH-10000. Older BIOS versions can sometimes cause bugs in memory card emulation or general system stability .

If you wanted to play PS2 games on a PC using emulators like or AetherSX2 , you couldn't just insert a disc. The emulator acts as a virtual body, but it needs a virtual brain.