Priority control architecture for input/output operation

Details Priority control architecture for input/output operation Priority control architecture for input/output operation

1986-03-12

1989-08-15

Williams, Jr., Archie E.

Boots, shoes, and leggings

3642382, 3642383, 3642412, 3642414, 3642422, G06F 1300, G06F 1314, G06F 1320, G06F 300

Patent

active

048581089

ABSTRACT:
An input/output control system includes an external data controller connected to a plurality of input/output units, a central processor, and a main storage accessible from the external data controller and the central processor. The main storage has a storage area corresponding to each input/ouptut unit and a storage area storing information to arrange a queue for a plurality of priority classes for determining the start priority of each input/output unit. At execution of a start instruction, the central processor sets a control information of the input/output unit to an associated storage area of the main storage and updates the queue arrangement information. The external data controller starts an input/output unit registered to a queue having the highest priority. The start operation is achieved according to the control information of the input/output unit stored in the main storage.

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