preserving directory structure. Example for PS1:

Distributing copyrighted BIOS files without permission is illegal in most jurisdictions. This report does not host or link to copyrighted BIOS packs, but explains how users can legally obtain and manage them.

To understand the importance of a BIOS pack, one must first understand the role of a BIOS (Basic Input/Output System) in original console hardware. In the 1980s and 90s, consoles like the PlayStation, Sega Saturn, and GameBoy Advance contained small chips with low-level software. This software initialized the hardware upon startup and managed communication between the game software and the console components.

Downloading pre-made "BIOS packs" from the internet is technically illegal because these files are copyrighted proprietary code.

in Batocera:

Therefore, the availability of BIOS packs online represents a conflict between digital preservation and intellectual property rights. While many websites host these packs, they operate in a legal gray zone. Users should be aware of these implications and ideally support the industry by purchasing official re-releases of classic games on modern platforms where available.