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The Quest for the "Holy Grail" BIOS: Understanding psxonpsp660.bin

• Fix: Use a slim PS2 (SCPH-70000+) or an internal hard drive with a fat PS2 (SCPH-30000) via a network adapter. USB 1.1 on PS2 is notoriously slow.

Identify the Source

A:

Not for PPSSPP. However, if you're using a PSP hardware emulator like POPS (the built-in PS1 emulator on PSP), then yes, the BIOS is essential.