How to use PS Classic extracted BIOS on retroarch?

Hello all, I’ve extracted the BIOS from my Playstation Classic (2 files a Japan and a US). However even after renaming them to the expected BIOS names and putting them in the /tmp/system folder PCSX rearmed doesn’t find it. Checking the emulator info it doesn’t seem to see them at all or recognize them as BIOS files.

as long as they’re named the exact same, it should pick them up, even if it’s the wrong checksum, AFAIK. Can you post a log of you trying and failing to load it?