He renamed it: PSXonPSP660.bin → scph1001.bin (for USA) or scph7001.bin .
The right BIOS name and dynamic recompiler turn a broken core into a perfect PS1 machine – even on low-power devices. Quick Reference Card | Problem | Fix using PSXonPSP660.bin | |---------|------------------------------| | Missing BIOS error | Rename to scph1001.bin → /system/ | | Slow performance | Enable Dynamic Recompiler | | Audio stutter | Turn off HLE BIOS (use renamed file) | | Multi-region fails | Duplicate as scph5500.bin , 5501 , 5502 | Psxonpsp660-bin Retroarch BETTER
scph5500.bin,MD5,scph5501.bin,MD5,scph5502.bin,MD5 (Replace MD5 with actual hash if needed – but PCSX ReARMed ignores strict hash check on PSP builds) Boot times dropped from 8 seconds to instant. Audio synced. Crash Team Racing ran full speed at 60 FPS. No more “HLE audio crackle”. He renamed it: PSXonPSP660
Then he read the logs: "Missing PSX BIOS – using HLE" . Leo learned that PSXonPSP660.bin is actually a renamed SCPH-7001 (USA) BIOS, common for PSP emulation. But RetroArch’s PCSX ReARMed core expects exact names. Audio synced