Signal processing system

Details Signal processing system Signal processing system

1998-05-27

2000-11-07

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

345167, 345169, 345157, 341 2, 341 22, G09G 500

Patent

active

061443697

ABSTRACT:
When the ball of a mouse is rotated, an up/down counter outputs a count N according to the direction of rotation and the amount of rotation. A controller compresses the count N to seven-bit data according to a conversion table. The controller also attaches L-button data indicating the state of the L button of the mouse to the most significant bit of the compressed seven-bit data. Then, the controller changes the bit positions of the eight-bit data, and reverses each bit value. The eight-bit data to be transferred has been thus completed. The controller sends bit by bit in series the data from a lower bit to a signal processing unit.

REFERENCES:
patent: 4430644 (1984-02-01), Blanchard, Jr. et al.
patent: 4503427 (1985-03-01), Iida
patent: 5903259 (1999-05-01), Brusky et al.

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