Laboratoire Europeen De Recherches Electroniques Avancees

Laboratoire Europeen De Recherches Electroniques Avancees Societe En Nom

Michel Poivet

Jean-Claude Guillon

Laurent Perdrieau

Patrick Daniel

A home computer system having a single input-output which is modified by a identifying circuit to identify a joystick or a mouse the identifying circuit utilizes potentiometers from the joystick which are connected to monostable circuits. The computer automatically recognizes that a joystick is present due to the triggering of the monostable circuits and the reading of the outputs from those monostable circuits.

Cumputer accessory exhibiting a common input for two separate auxilliary

A method for displaying a supplementary video image outside a main image. For example, the main image has a 4/3 aspect ratio and the tube has a 16/9 aspect ratio. The method includes steps of processing a supplementary video image at the time of the line return of the main image to provide a video signal of the desired format. Then, multiplexing the components of the main video signal with the components of the supplementary video signal; and then separately processing the components of the multiplexed signal to produce the components of the display signal for a display on the tube. The displayed image has the main 4/3 aspect ratio image in 4/3 aspect ratio occupying approximately 12/9 of the screen and supplementary video images occupying the remaining 4/9 of the screen.

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Illkirch, France

Michel Poivet