Psxonpsp660.bin Scph101.bin Scph7001.bin Scph5501.bin Scph1001.bin [upd]

: Originally extracted from PlayStation Portable (PSP) firmware 6.60 , this is a region-free, optimized BIOS. It is widely considered the "best" version for emulation because it is faster and fixes random freezes found in older hardware dumps.