Data processing system with lock-unlock instruction facility

Details Data processing system with lock-unlock instruction facility Data processing system with lock-unlock instruction facility

1981-05-19

1984-12-11

Chan, Eddie P.

Boots, shoes, and leggings

G06F 1300

Patent

active

044882173

ABSTRACT:
A data processing system including a plurality of data units and a common bus. The data unit includes apparatus for issuing instructions including a LOCK instruction and an UNLOCK instruction. Each data unit includes apparatus responsive to the instructions such that, if the first data unit issues a LOCK instruction, the data unit other than the first data unit, are prevented from transferring information over the common bus with a LOCK instruction until an UNLOCK instruction is issued by any data unit.

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"A Systematic approach to the design of digital bussing Structure", written by Thurber et al., Fall Joint Corp. Conf. 1972, pp. 719-740.
Vax 11/780, DW 780 Unibus Adapter Tech. Description Manual, Published by Digital Equipment Corp. 1978, pp. 2-27, and 2-30.
Madnick/Donovan, Operating Systems, 1974, McGraw-Hill Inc. pp. 251-267.
Donovan, System Programming, 1972, McGraw-Hill Inc., pp. 395-400.

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