Ps2 Bios Scph 90001 -

The BIOS contains updated "mechacon" (mecha controller) code that improves check for original discs. Counterfeit discs are harder to run without a modchip.

The majority of PCSX2 developers and power users recommend using a SCPH-39001 or SCPH-50001 BIOS. Why? Because those models have full HDD support and fewer patched security features, making homebrew and disc loading more flexible. The 90001 offers no tangible advantage for standard game emulation. ps2 bios scph 90001