: Emulators cannot run PS2 games without these proprietary files because they contain the code necessary to establish the environment games expect. Compatibility

The SCPH-75000 does not have the original PS1 CPU. Instead, Sony used a software emulator called . This is actually stored inside the BIOS . If you want to emulate PS1 games via PCSX2 (not recommended – use DuckStation), the 75000 BIOS will try to use POPS, which PCSX2 does not support perfectly. Advice: Use a standalone PS1 emulator. For PS2 emulation, the 75000 BIOS is stellar.

To use the SCPH-75000 BIOS with an emulator, you must place the dumped files into the software's designated directory. PS1Drv Video Mode Negater (PS1VModeNeg) - GitHub