System for controlling the number of data pieces in a queue memo

Details System for controlling the number of data pieces in a queue memo System for controlling the number of data pieces in a queue memo

1992-08-11

1994-05-17

Lall, Parshotam S.

Boots, shoes, and leggings

3642443, 3642477, 3642513, 3642545, 3649462, 3649576, 3649602, 364DIG2, G06F 922

Patent

active

053136004

ABSTRACT:
A system for controlling the number of data pieces in a queue memory includes a counter comprising a plurality of counting circuits each of which adds the current effective data piece number of the instruction queue to an associated, preselected value derived from the difference between a detectable input data piece number and a particular output data piece number. A selector responsive to a selecting signal provided by a queue controller selects one of the counting circuits with the associated preselected value equal to the difference between the current input data piece number and the current output data piece number to provide the effective data piece number. The queue controller calculates this difference and provides it as the selecting signal to the selector.

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IBM Technical Disclosure Bulletin, vol. 20, No. 4, Sep. 1977 pp. 1347-1348, New York, US; J. W. Plant: "Variable Decrementer".

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