| Emulator / Platform | BIOS Directory Path | Notes | | :--- | :--- | :--- | | | /system/ directory | Place it in the RetroArch "system" folder. If you use a preset "BIOS" folder, ensure your core's settings point to it. You must check "Settings > Directory > System/BIOS". | | RetroPie (Raspberry Pi) | /home/pi/RetroPie/roms/psx/ or /home/pi/RetroPie/BIOS/ | The exact location depends on your setup. Many RetroPie builds place the BIOS in the core's folder, but the universal BIOS folder is often used. | | Batocera Linux | /userdata/bios/ | Batocera expects all BIOS files in this central "bios" folder. It will automatically detect psxonpsp660.bin here. | | Miyoo Mini / Onion OS | /BIOS/ at the root of your SD card | Onion OS uses a central BIOS folder. There is a known issue where you may need to delete HLE BIOS save states for the new BIOS to take effect. | | PCSX-ReARMed (Standalone) | \emus\pcsx_rearmed\bios (example for some CFWs) | This varies greatly. Consult your device's documentation. Some custom firmware requires multiple BIOS files in this folder. |
Many developers host the firmware files directly on GitHub for custom firmware projects.
Once you have acquired the file, installing it is straightforward. The exact directory varies depending on the platform you are using. 1. RetroArch (All Platforms) Locate your main RetroArch directory. Open the folder. Download Psxonpsp660.bin
Ensure your battery is charged. If you are using a PSP Go, ensure the file is copied to the internal memory if the memory stick is not active.
The file is a specialized PlayStation 1 (PSX) BIOS file originally extracted from the Sony PSP's official firmware (version 6.60) . While traditional BIOS files come from physical PS1 hardware, this version was optimized by Sony for emulation, offering enhanced performance and broader compatibility for modern setups. Why Use PSXONPSP660.bin? | Emulator / Platform | BIOS Directory Path
Move the psxonpsp660.bin file directly into this folder. Ensure the filename is strictly lowercase if you are running a Linux-based OS (like SteamOS on the Steam Deck or EmuELEC), as Linux is case-sensitive. 2. DuckStation (PC & Android) Launch DuckStation. Go to > BIOS Settings . Click on Open BIOS Directory .
Most users find this file by searching for a "complete BIOS collection" on archival sites like the Internet Archive. | | RetroPie (Raspberry Pi) | /home/pi/RetroPie/roms/psx/ or
PSXONPSP660.bin is a specialized BIOS used to emulate PlayStation 1 (PSX) games on modern handhelds and software emulators. It is widely considered the "gold standard" for PS1 emulation due to its origins and unique features. What is PSXONPSP660.bin? This BIOS was originally developed by Sony for use in PSP firmware 6.60
Standard console BIOS files are region-locked (e.g., SCPH-1001 is for North American NTSC games, while SCPH-7502 is for European PAL games). Psxonpsp660.bin is region-free, meaning it can boot games from the US, Europe, and Japan seamlessly.
You do not need separate BIOS files for NTSC-U, NTSC-J, or PAL games.