Dynamic polling of devices for nonsynchronous channel connection
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United States of America Patent
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-
Apr 6, 1993
Grant Date -
N/A
app pub date -
Aug 31, 1990
filing date -
Aug 31, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multi-path controller is disclosed for connecting CPU channels with DASD device subsystems. Extended channel connection time are accommodated in the polling of the devices. The request for access signals for the devices are retained for a period of time during which channel connection should be completed and then dropped. The CPU and the controller are freed to complete other work in between the polling cycles. The requests-for-access signals by the devices for connection to the channel that requested the connection does not tie up the channels and the devices while communication is being made.
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