To keep your emulation setup entirely legal and safe from malware, you should dump the BIOS from your own physical PlayStation 2 console. Step 1: Dump the BIOS From a PS2 Console
If you run into roadblocks while launching AetherSX2, use these quick fixes for common BIOS bugs. Error: "BIOS Image Not Found" aethersx2 bios 4mb
locating legal instructions to dump your PS2 BIOS (using a USB drive and FreeDVDBoot or similar), refer to the official PCSX2 documentation, which covers BIOS dumping in detail. To keep your emulation setup entirely legal and