Extended gaming machine facilities by microprocessor control

Many fruit machines are microprocessor controlled but most appear to the player to be very similar to earlier electromechanical machines. Little advantage has been taken of the opportunity to devise more sophisticated games, which microprocessor control gives. This article describes the implementation of a game which includes some features which would be difficult to implement by other than microprocessor control. It discusses the techniques used, the problems arising and the likely future developments.