Are you trying to set this up for a specific emulator like PCSX2, or Retro Game BIOS Files - What are they? Where? Which ones?
Downloading BIOS files from the internet is a legal gray area and often violates copyright laws. The most legitimate way to acquire your BIOS for emulation is to . scph 70004 bios
In emulators (DuckStation, Beetle PSX, PCSX ReARMed), the scph70004.bin BIOS is used to: Are you trying to set this up for
Later revisions of the 70004 that included a hardware-level laser protection fix. scph 70004 bios