: The original Japanese launch BIOS. It is often avoided for general emulation due to known bugs in memory card handling.
Here is a snapshot of popular BIOS files found in various collections: Model Range Common BIOS Name SCPH-10000 SCPH-10000_2254240 v1.00 (Early) SCPH-39001 SCPH-39001_V7 SCPH-50004 SCPH-50004R_V6 SCPH-70006 SCPH-70006_V12 SCPH-90001 SCPH-90001_V18 SCPH-90006 SCPH-90006_V18 How to Get These Files Legally all ps2 bios files -including the new scph-90006-
Once you have a legitimate BIOS dump, installation is straightforward: : The original Japanese launch BIOS