Changes

Some emulation cores require special system files, or BIOSes. These can be downloaded [[Emulator_Files#Multi-System|here.]] Extract the ''system'' folder in that archive to where you installed RetroArch (the folder where the retroarch program is. retroarch.exe on Windows).  If it doesn't find the BIOS, go to ''Settings'' → ''Directory'' → ''System/BIOS Dir'' (or find <code>system_directory</code> in the config file) and make sure it points to the ''system'' folder.