Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1997-10-08
1998-11-17
Black, Thomas G.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345163, 34082521, 395821, G06F 3033
Patent
active
058383042
ABSTRACT:
Data is transmitted from a mouse to a host computer in accordance with a 3-byte packet protocol. The first byte includes bits indicating the status of first and second buttons on the mouse. The first bit of each byte serves as a sync bit. The sync bit has a value of "1" in the first byte and a value of "0" in each of the second and third bytes. Data representing movement of the mouse in two dimensions is encoded as two 8-bit twos-complement integers which are transmitted as part of the three-byte packet.
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Black Thomas G.
Choules Jack M.
Microsoft Corporation
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