To use an USB2 drive, you must have IOS58 installed (it should be automatically installed with System Menu 4.3 update). By default, the emulator will look for ROM files in the /genplus/roms directory but you can place them anywhere you want, the menu keeping trace of the last accessed directory for each device. If no SD card is inserted when the emulator starts, it automatically creates a directory named “/genplus” at the root of your USB drive partition, as well as a few subdirectories, all required by the emulator to store important files (configuration, cheat files, SRAM files, screenshots, etc). The USB drive should have at least one partition formatted to FAT (FAT16 or FAT32), other file systems (NTFS, EXT2, etc) are not supported. The emulator will automatically look for roms in genplus/roms folder. Make a folder in your SD Card root called 'genplus' place the 'genplus_wii.dol' file in the folder, make a new folder called 'roms' in the 'genplus' folder. If your Wii is correctly softmodded it should now be able to run the emulator through The Homebrew Channel. Move the 'apps' folder to the root of your SD Card. Unzip the genplus-gx.zip folder, in it you should find a folder named 'apps'. The SD card should have at least one partition formatted to FAT (FAT16 or FAT32).

This is a port of Charles MacDonald's Genesis Plus to the Wii, with a lot of improvements. Genesis Plus GX is a Mega CD / Sega CD, Genesis/Megadrive, Master System, Game Gear and SG-1000 emulator by Eke Eke.

Wii homebrew sega emulator channel