 The MS-DOS boot disk also included a utility which could be used to switch between the internal display and an external monitor without rebooting.In late 1988 Amstrad created a desktop computer based on the PPC design, intended for the home market.The LCD was replaced by an RF modulator to display CGA video on a domestic television, and the keyboard and system unit were combined in an integrated case similar to the original Atari ST or the Amiga 500.