Hybrid disc doesn't work with SCPH-90001, 3.11U ... - GitHub

If you’re looking for help with from a SCPH-90001 console, I can provide the step-by-step process using homebrew software — just let me know.

The (often identified as version v2.30 ) represents the final and most refined firmware released for the PlayStation 2. This specific BIOS was designed for the "final" Slim model (SCPH-9000x series), which introduced a built-in AC adapter and a significantly overhauled internal architecture. The Legacy of the SCPH-90001

In this revision, the PS1 hardware (IOP) found in earlier models was removed and replaced with software emulation, which is handled directly through the BIOS instructions. The "Free McBoot" Compatibility Issue

The SCPH-90001 BIOS can be dumped from physical hardware using:

The only legal way to obtain the PS2 BIOS SCPH-90001 is to extract it from the console itself. This process, known as "dumping," usually involves the following steps: