This post is for educational purposes only. Make sure you have the right to play the PSX games you are using with this emulator.
Restart EmulationStation or reboot the Raspberry Pi.
Even with the correct file, you might encounter issues. Here’s what to check:
The PSXonPSP660.bin file is a digital copy of the PlayStation 1 BIOS extracted from the . psxonpsp660bin bios
Sony’s engineers refined the emulation code for the PSP, stripping away unnecessary features present in original PS1 BIOS versions. The result is a leaner, faster BIOS that improves emulation performance, particularly on low-powered devices such as handhelds, single-board computers (e.g., Raspberry Pi), and retro gaming consoles.
Standard BIOS files are region-locked (e.g., SCPH-5501 for NTSC-U, SCPH-5502 for PAL). The psxonpsp660.bin file acts as a universal, region-free BIOS that can boot NTSC, PAL, and NTSC-J games seamlessly.
Fixes issues where background music wouldn't loop. This post is for educational purposes only
Multiple emulation guides and distributions specifically recommend this BIOS for achieving the highest level of game compatibility. The Onion OS documentation for the Miyoo Mini states: “Using the PSXONPSP660.bin bios is recommended for best compatibility”. Similarly, REG-Linux notes that the BIOS “works for most games”.
Your PSP must be running custom firmware (e.g., 6.60 Pro-C2, 6.61 LME). This guide is not for stock firmware.
While this BIOS improves performance, audio stuttering usually points to incorrect video refresh rates or an overly demanding graphic upscaling setting within your emulator's core options. Even with the correct file, you might encounter issues
The Onion OS custom firmware for Miyoo devices has specific requirements for the psxonpsp660.bin BIOS.
While discussing how to use this file, this article does not provide direct download links. We aim to educate on best practices for those who already possess a legal backup of their own PSP’s BIOS.
It includes various fixes coded directly by Sony to prevent game-breaking bugs and stuttering.