Psxonpsp660.bin Archive.org ((better)) -

Thus, Psxonpsp660.bin is a BIOS dump from a PSP running official firmware 6.60. It contains the decryption keys and low-level instructions required to run both PSP native titles and PS1 emulated titles.

If you check Archive.org today, you will notice that many direct links to Psxonpsp660.bin have been removed or marked as "Item not available." The files remain on the backend servers, but public access is often blocked. Psxonpsp660.bin Archive.org

Ultimately, the user must decide for themselves. Most emulation communities operate on a "don't ask, don't tell" basis regarding BIOS sourcing. Thus, Psxonpsp660