This is a tiny WAD file (usually ~500KB) that installs a channel. When you click this channel, it tells the Wii to look on your SD card (or USB drive) in the /apps/genplus-gx/ folder for the boot.dol file.
Unlike an emulator launched from the Homebrew Channel, the WAD version still needs to read ROMs from your SD card or USB drive. By default, Genplus GX looks for:
Let’s address the elephant in the room. It is open-source software written from scratch without stolen code.
It handles the complex BIOS requirements of the Sega CD perfectly, allowing you to play classics like Sonic CD or Snatcher .