Finding the files is the hardest part. Because these are copyrighted Nintendo properties, they aren't hosted on official sites. Most users find them on community-driven archives or through the 3DS Hacks Guide , which explains how to dump them from your own hardware.
under copyright law as these files are the proprietary intellectual property of Nintendo. For emulators like Citra, the most legal and safe method to obtain these files is to them from your own physically owned Nintendo 3DS console. Why BIOS and System Files are Needed Nintendo 3ds Bios File Download
of the physical console. It contains the low-level code that tells the 3DS hardware how to talk to its different components, like the screen and buttons. Finding the files is the hardest part
When people look for a "3DS BIOS download," they are usually looking for the (keys and system archives) that allow an emulator to mimic a real 3DS environment. Why Do You Need These Files? under copyright law as these files are the
If you have dumped your games in an encrypted format (.3ds or .cia), the emulator needs the AES keys to "unlock" and play them.
If you own a 3DS with Custom Firmware, you can use tools like to export your system's unique keys and archives.