A cheat cartridge is attached to an interface port on a home computer or console. It allows a user to modify the game code either before or during its execution. An early example is the Multiface for the ZX Spectrum, and almost every format since has had a cheat cartridge created for it; such as Datel's range of Action Replay devices. Another popular example of this is Game Genie for Genesis, NES, Super NES, Game Boy, and Game Gear game consoles. Modern disc-based cheat hardware includes GameShark and Code Breaker which modify the game code from a large database of cheats. In later generation consoles, cheat cartridges have come to be replaced by cheat discs, containing a simple loader program which loads a game disc and modifies the main executable before starting it.