Datel Action Replay
Action Replay is the brand name of a series of devices created by Datel, primarily used for changing the behavior of video games. Currently, Action Replay is available for the Nintendo GameCube, Game Boy Advance, Nintendo 64, PlayStation 2, Xbox, Nintendo DS, Wii and PlayStation Portable. Action Replays that were capable of saving the system’s state to tape or disk all operated in broadly the same way. By attaching to the computer’s memory bus (via the Zorro expansion slot on the Amiga),[1] all memory access by the processor could be monitored. By keeping track of all writes to hardware registers (for example, to the video or sound hardware) the Action Replay could keep a complete copy of the state of all those registers in its own internal memory.[2] This state could then be saved, along with the contents of the computer’s RAM for later re-loading.
