The nand.bin file is a dump of the . Unlike standard DS emulation, which can often run games without external BIOS files, DSi emulation requires a valid NAND image to:
If you tell me you're getting (if any), or whether you're using Windows or Android , I can provide more specific troubleshooting steps.
In the context of the melonDS emulator , is the critical file representing the internal flash memory (NAND) of a Nintendo DSi. Problems involving the top screen often occur during DSi mode setup or when attempting to boot the DSi firmware. The Role of nand.bin in melonDS
Due to copyright restrictions, melonDS developers do not pack system files into the emulator build. The safest, legal way to get them is by using a homebrew home-dumper application like or dumpTool on a physical, modded Nintendo DSi console. 2. Emulator Directory Mapping
Select File > Boot Firmware to ensure the NAND loads properly. You should see the Nintendo DSi loading screen. Managing DSi Titles on the NAND