Think of this as the archaeology of a digital ghost . The Name is a Lie (Sort Of) Let’s get the confusion out of the way. When you see psxonpsp660.bin , your brain reads it as: "PSX on PSP, version 6.60, BIOS."
But here’s the twist:
Unlike the PS1 or PS2, the PSP loads its operating system from a file called pspOS inside its firmware. So what the heck is this .bin file that every PS1 emulator (DuckStation, Xebra, RetroArch) seems to beg for? psxonpsp660.bin bios