: Unzip your BIOS pack and move the individual files directly into the system folder. Avoid creating extra subfolders unless a specific core requires one (e.g., some Dreamcast cores need a dc folder). Most Common BIOS Requirements (2025)
Legally, users are expected to "dump" or extract firmware from their own physical consoles. However, popular community-maintained resources for 2025 include: retroarch bios pack 2025 free