If you are reading this, you have likely just installed the on your phone, PC, or handheld device. You dragged a .iso file into the folder, hit "Play," and were met with a frustrating black screen or a pop-up asking for a missing file: psxonpsp660.bin .
Subreddits like r/PSP and r/PSPHacks have official wiki pages and pinned posts with Google Drive or MediaFire links to essential files.
Because downloading raw BIOS files from random Google searches puts your device at risk of malware, you have two primary, safe options: 1. Dump it from your own PSP (The Legal Way) If you own a hacked PSP with custom firmware: Use a tool like on your PSP. Extract the popsman.prx file from the official 6.60 update.