Look for a folder labeled "BIOS" or "System" .
: Sony patched this specific version to improve stability and performance for its "PSOne Classics" line. Versatility : It is highly recommended for popular emulators like DuckStation (PCSX-ReARMed/SwanStation), and handheld OSs like Quick Setup Guide gingerbeardman/PSX - GitHub psxonpsp660bin bios file free