. Over its 13-year lifespan, the BIOS underwent significant transformations: The ProtoKernels (SCPH-10000/15000)
The only legal way to obtain PS2 BIOS files is to . Downloading BIOS files from third-party websites is considered a violation of Sony’s copyright. To stay legal: all ps2 bios files including the new scph90006 link
Sony updated the BIOS constantly to patch modchips, fix DVD playback, and remove features (like the infamous Linux Kit support). Here is the timeline: . Over its 13-year lifespan