While the emulator itself is legal open-source software, downloading the BIOS from third-party sites is generally considered illegal. To stay safe and compliant, you should use your own hardware to get the necessary files. Why You Need a PS2 BIOS
In reality, the PCSX2 emulator (even version 1.0.0) is designed to work with a variety of PlayStation 2 BIOS dumps. The most commonly used and stable BIOS files for emulation generally come from the SCPH-7xxxx or SCPH-5xxxx series, but compatibility ranges across almost all models. Pcsx2 1.0.0 Bios Rom Free Download
The modern PCSX2 (version 1.7.0+ nightly) has: While the emulator itself is legal open-source software,