PCSX2 BIOS is the core file that makes the PlayStation 2 emulator work properly on a computer. It contains the original system data of the PS2 console, which the emulator needs to boot and run games just like the real hardware. Without the BIOS, PCSX2 cannot function because it relies on this firmware to create a true PlayStation 2 environment. To use it legally, players should dump the BIOS from their own PS2 console instead of downloading it from the internet. Once set up, the BIOS ensures better performance, accurate emulation, and wider compatibility with PS2 games.
