Psxonpsp660.bin Bios Here

In 2006, Sony wanted to sell PS1 games on the PSP. They couldn't just emulate a PS1—the PSP’s CPU (MIPS R4000) is different from the PS1’s CPU (MIPS R3000). So they built a brilliant hybrid:

Unlike hardware BIOS files that are locked to Japan (scph5500), North America (scph5501), or Europe (scph5502), PSXONPSP660 is region-free . It can boot games from any territory without needing separate files. psxonpsp660.bin bios

If you are running a custom firmware (CFW) or using the popular plugin, you need this file for two main reasons: In 2006, Sony wanted to sell PS1 games on the PSP

Sony optimized the code to reduce overhead. In many emulators, this results in faster boot times and more stable frame rates in demanding titles. North America (scph5501)

Here is where the guide gets spicy.