Video game system having means for displaying a key programming

Claim 1

A video game system comprising: (1) a video display for displaying a key programming process, and for displaying video output of the video game system; (2) a game cartridge having a video game software stored in the game cartridge; (3) a game control unit having a program key and a plurality of control keys, said game control unit having no processing unit for processing the program key and said plurality of control keys; and (4) a game box comprising: (a) an electrical cable for connecting the video display; (b) a slot for receiving the game cartridge wherein the game cartridge is removable when the game cartridge is plugged in the slot; (c) a memory unit and a central processing unit (CPU) for program execution; (d) a system software for controlling operations of the game box; the system software comprising a displaying software for controlling operations of displaying the key programming process over the video display after the program key is pressed and terminating display of the key programming process after the program key is pressed again; the key programming process defining a function of a control key by using a key sequence which is formed by a plurality of other control keys of the game control unit, said key sequence being stored in said game box; wherein the video game software stored in the game cartridge is executed by the CPU when playing the video game, and the game box receives input signals from the game control unit to control proceedings of the video game and displays video outputs over the video display.