This often happens if the firmware.bin and the NAND image don't match. Ensure both were dumped from the same console.
Place your BIOS files directly into the root folder where NO$GBA.EXE is located.
Unlike the Game Boy Advance or original DS, which required one or two BIOS files, the DSi is more complex. To fully emulate a DSi, you typically need three distinct dumps:
Once you have your bios7.bin , bios9.bin , and firmware.bin , setup is usually straightforward: Go to -> Emu settings . Select the DSi mode tab. Check "Enable DSi mode." Browse and select your BIOS and Firmware files. Place the files in the same folder as the .exe . Go to Options -> Emulation Setup . Set "Reset/Startup Process" to "DSi (retail/ROM)." Frequently Asked Questions dsi bios files download
If you are still having trouble setting up your DSi BIOS, please tell me which emulator you are using (e.g., melonDS, Delta, Twilight Menu) so I can give you more specific instructions. Share public link
Put the application on an SD card inside a flashcart (like an R4) and run it on your actual DSi.
The emulation community is actively working on open-source BIOS replacements. Projects like (for Neo Geo) have inspired developers to create clean-room reverse-engineered DSi BIOS equivalents. As of 2025, this work is still in early alpha stages because the DSi’s encryption (AES-128 with per-console keys) is extremely complex. Until then, dumping your own hardware remains the gold standard . This often happens if the firmware
A Japanese DSi BIOS may have difficulty running US-region DSiWare.
Here is a quick breakdown of the essential files for DSi emulation, along with standard naming conventions:
| File | Description | Standard Name (melonDS) | Alternate Name (RetroArch) | | :--- | :--- | :--- | :--- | | | The BIOS for the DSi's ARM7 processor. | biosdsi7.bin | dsi_bios7.bin | | DSi ARM9 BIOS | The BIOS for the DSi's ARM9 processor. | biosdsi9.bin | dsi_bios9.bin | | DSi Firmware | Contains the DSi's menu and settings. | firmware_dsi.bin | dsi_firmware.bin | | DSi NAND | A complete dump of the internal NAND memory. | dsi_nand.bin | dsi_nand.bin | Unlike the Game Boy Advance or original DS,
The challenge was set: DSI_Legend had to create a fully functional DSi emulator using only open-source tools and share their progress with the community. It was a daunting task, but DSI_Legend was up for it. They spent countless hours coding, testing, and refining their emulator.
Once you have successfully dumped your files, you must place them in the correct directories for your emulator to recognize them. 1. melonDS Setup melonDS provides excellent support for DSi emulation. Open melonDS and navigate to > Emu settings . Select the DSi mode tab. Check the box labeled Enable DSi mode . Browse and select your dumped files for: DSi Firmware DSi NAND image Click OK and restart the emulator. 2. No$GBA Setup
Legal Warning: BIOS files are copyrighted property of Nintendo. Downloading them from random websites is illegal. The legal way to obtain these files is by dumping them from your own Nintendo DSi console. 1. The Legal Method: Dumping from Your DSi