If you cannot legally obtain psxonpsp660.bin , do not despair. PPSSPP is designed to work without it. You will lose the boot logo and some low-level compatibility, but the vast majority of PSP games (over 90%) run perfectly using HLE.
A: Yes, but it will be named psxonpsp661.bin . PPSSPP supports it, but 6.60 is the most tested. Psxonpsp660.bin Bios File
The PSP does not natively run PS1 ISOs from the XMB (Cross Media Bar) menu in the same way it runs PSP games. Instead, Sony developed an internal emulator known as (PlayStation On PSP System). If you cannot legally obtain psxonpsp660
If you are using a PSP with Custom Firmware (CFW) or an emulator on your PC, follow these general steps: For PSP Users (POPSloader) A: Yes, but it will be named psxonpsp661
Modern emulators often prefer this file because of its clean code. Open your emulator’s "System" or "BIOS" folder. Drop the psxonpsp660.bin file into the directory.
For users running Custom Firmware (CFW) on their PSP, locating and installing the BIOS file is a critical step in setting up a PS1 gaming environment.