on the main menu to view the "Version" screen. For a 90001 model, you will typically see a version (BIOS) of or higher. Regional Code : The "1" at the end of 9000 signifies the North American (NTSC-U/C) 2. Dumping the BIOS (The Legal Method) To use this BIOS with emulators like AetherSX2/NetherSX2 , you must legally dump it from your own hardware.
For the 90001 specifically, dumping can be done via: ps2 bios scph 90001
The SCPH-90001 BIOS is unique because it is one of the "v18" or "v19" revisions. This specific firmware version includes the final optimizations Sony made for the console, though it is also famous among modders for being the version where Sony patched the "Free McBoot" exploit in many units. Why the SCPH-90001 Version Matters on the main menu to view the "Version" screen
Note: Actual hash values change based on console sub-revision and BIOS build date. Dumping the BIOS (The Legal Method) To use
or higher (manufactured after late 2008) cannot boot FMCB directly from a memory card. Impact on Modding
For the homebrew community, the SCPH-90001 BIOS is legendary for being difficult to mod. The Exploit Patch: Sony patched the memory card exploit used by FreeMcBoot (FMCB)
Turn back. The risk of malware is high, and the legal consequences, while rare, are real. Search for "how to dump my PS2 BIOS from console" instead of the file itself.