SUPERVISORY CONTROL OF PERIPHERAL SUBSYSTEMS

A peripheral subsystem accepts and responds to a plurality of supervisory channel commands which alter the operation of the subsystem; i.e., logically partition, break the logical partition, adjust or amend the logical partition, ignore the logical partition, give operator controls for loading and u...

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Bibliographic Details
Main Author VIDEKI, EDWIN R., II
Format Patent
LanguageEnglish
French
Published 13.03.1984
Edition3
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A peripheral subsystem accepts and responds to a plurality of supervisory channel commands which alter the operation of the subsystem; i.e., logically partition, break the logical partition, adjust or amend the logical partition, ignore the logical partition, give operator controls for loading and unloading a record cartridge, suspending multipath reconnection and the like. These supervisory commands can be located anywhere in a I/0 chaining sequence. Some of the supervisory commands will result in changes in the subsystem operation for the duration of the instant channel program or CCW chain while other persist for as long as the subsystem is operating or until a subsequent supervisory command overrides the previous supervisory command. One of the supervisory commands can selectively inhibit subsequent supervisory commands only within a given I/O chain. This selective inhibit provides subsystem integrity. At the end of the chain, the inhibition is removed.
Bibliography:Application Number: CA19810381221