The BIOS handles the iconic "towers" startup screen and the Sony Computer Entertainment logo. Hardware Translation:
The 70012 BIOS uses a different memory card initialization sequence. This is rare, but affects some homebrew. Fix: In PCSX2, go to Config > Memory Cards and reformat the virtual card using the PS2 browser (boot PS2 without disc, go to Browser, select card, press Triangle > Format). ps2+bios+scph70012bin