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DS emulator, sorta
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Hydr8gon switch: modularize the UI and make the code not disgusting
ui can be drag n dropped into any Switch project for easy UI building!
Latest commit 514ac7a Mar 16, 2019
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flatpak Add manifest for building as a flatpak Nov 4, 2018
icon add nintendo switch build Dec 13, 2018
romfs switch: folder icons and even more refactoring Jan 21, 2019
src switch: modularize the UI and make the code not disgusting Mar 16, 2019
CMakeLists.txt Fixed checking for build type Jan 6, 2019
LICENSE reorganize repo, move shit around Mar 16, 2017
melon.rc also, update copyright name Jan 22, 2019


DS emulator, sorta

The goal is to do things right and fast, akin to blargSNES (but hopefully better). But also to, you know, have a fun challenge :)

How to use

melonDS requires BIOS/firmware copies from a DS. Files required:

  • bios7.bin, 16KB: ARM7 BIOS
  • bios9.bin, 4KB: ARM9 BIOS
  • firmware.bin, 128/256/512KB: firmware

Firmware boot requires a firmware dump from an original DS or DS Lite. DS firmwares dumped from a DSi or 3DS aren't bootable and only contain configuration data, thus they are only suitable when booting games directly.

Possible firmware sizes

  • 128KB: DSi/3DS DS-mode firmware (reduced size due to lacking bootcode)
  • 256KB: regular DS firmware
  • 512KB: iQue DS firmware

DS BIOS dumps from a DSi or 3DS can be used with no compatibility issues. DSi BIOS dumps (in DSi mode) are not compatible. Or maybe they are. I don't know.

As for the rest, the interface should be pretty straightforward. If you have a question, don't hesitate to ask, though!

How to build


  • Install dependencies:
sudo apt-get install libpcap0.8-dev libcurl4-gnutls-dev libsdl2-dev gtk+-3.0
  • Compile:
mkdir -p build
cd build
cmake ..


  • use CodeBlocks
  • or receive golden cookies if you get Cmake to work

Build system is not set in stone.


  • improve libui and the emulator UI
  • hardware renderer for 3D (w/ upscaling and fancy shit)
  • support for rendering screens to separate windows
  • emulating some fancy addons
  • other non-core shit (debugger, graphics viewers, cheat crapo, etc)


  • better wifi
  • maybe emulate flashcarts or other fancy hardware
  • big-endian compatibility (Wii, etc)
  • LCD refresh time (used by some games for blending effects)
  • any feature you can eventually ask for that isn't outright stupid


  • Martin for GBAtek, a good piece of documentation
  • Cydrak for the extra 3D GPU research
  • All of you comrades who have been testing melonDS, reporting issues, suggesting shit, etc


GNU GPLv3 Image

melonDS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

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