Some early backwards-compatible PS3 models contain PS2 hardware or emulation layers. You can extract certain BIOS components, though this is more complex and not recommended for beginners.
If you simply want to play PS2 games without legal concerns: ps2 scph 90001 bios download free
For PCSX2 (the leading PS2 emulator), using the SCPH-90001 BIOS theoretically offers: For PCSX2 (the leading PS2 emulator), using the
However, there is a catch. The newer the BIOS, the harder it is to dump (extract) and the more aggressive the copyright protection. However, there is a catch