The safest and only legal way to acquire this file is to dump it directly from your own hardware. Install custom firmware on your PSP.
Ensure your antivirus is active before downloading any zip files. How to Install the File
Due to strict copyright laws, downloading raw BIOS files from the internet is illegal. Sony owns the copyright to this software. Legal Extraction Method psxonpsp660bin bios file free
Avoid sites that require you to download executable files ( .exe ).
If the file size is 0kb or extremely small, the file is corrupted. You must redownload or re-dump it. The safest and only legal way to acquire
It translates original PS1 hardware calls into code the PSP understands.
To help me tailor the next steps for you, please let me know: What or device are you trying to set up? How to Install the File Due to strict
The psxonpsp660bin file is the PlayStation 1 BIOS extracted from the PSP firmware version 6.60.