Psxonpsp660.bin Scph101.bin Scph7001.bin Scph5501.bin Scph1001.bin -

| BIOS File | Boot Speed | Audio Accuracy | Late-Game (1999+) | Region-Free | Cheat Compatibility | |-----------|------------|----------------|-------------------|-------------|----------------------| | scph1001.bin | Slowest | Good | Poor | No | Excellent | | scph5501.bin | Medium | Very Good | Good | No | Excellent | | scph7001.bin | Medium | Excellent | Very Good | No | Excellent | | scph101.bin | Medium (PAL) | Very Good | Good (PAL only) | No | Good | | psxonpsp660.bin | Fastest | Excellent | Excellent | Yes | Limited |

, make a copy of it, and rename that copy to the missing filename (like scph1001.bin | BIOS File | Boot Speed | Audio

Here is the story behind the code.