BIOS

To add a bios to your system, you need to check the json containing all verified BIOS files "system_bios.json". You must also make sure it has the same signature and is in the same format/extension.

Then all you do is navigate to your Jellyfin data folder, and add it to the "jellyemu-bios" folder, then head to jellyemu configuration page, you should see it show up.

That list of bios files was curated specifically by retroarch.