Packet-based mouse data protocol
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United States of America Patent
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-
Nov 17, 1998
Issued Date -
N/A
app pub date -
Oct 8, 1997
filing date -
Nov 2, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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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