Method of operating a bus in a data processing system via a repetitive three stage signal sequence
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United States of America Patent
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May 10, 1988
Issued Date -
N/A
app pub date -
Jul 23, 1984
filing date -
Aug 27, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a data processing system which is comprised of a plurality of devices that carry on conversations with each other over a time-shared bus. These conversions can consist of a message from a device A to a device B which is immediately followed by a message from device B back to device A, or a message from device A to device B which is immediately followed by a message from device B to another device C, or a single message from device A to device B. In each case, the last device to receive a message assumes control of the bus; and it relinquishes this control by either sending a message to another device or by broadcasting a poll code to all devices on the bus.
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