This is the A2000 version of the Action Replay MK II. The device plugs into the CPU slot of the A2000 and NOT a Zorro slot which means that if you use an accelerator in the CPU slot, you will not be able to use this card. The device allows the user to freeze the computer at any point they choose where upon a new display opens and allows the user to view the memory contents, rip music and graphics or cheat in games. It also had the option of saving memory to a bootable floppy disk which when loaded would place the memory in the exact state when the machine was frozen. This allows the user to copy games by bypassing the copy protection and so forth.