Circuit and a method for the selection of original data from a r

Details Circuit and a method for the selection of original data from a r Circuit and a method for the selection of original data from a r

1985-12-23

1989-02-14

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 1100

Patent

active

048050954

ABSTRACT:
A circuit for maintaining copies of original index registers and copies of modified index registers such that in the event original copies of the index registers are needed, they may be restored. The circuit is for use in a fault tolerant system wherein in the event of a rollback, original copies of the index registers may be restored to a processor, even if some of the index registers were modified in the previous execution of a command by the processor.

REFERENCES:
patent: 3940736 (1976-02-01), Inaba et al.
patent: 4044337 (1977-08-01), Hicks et al.
patent: 4493035 (1985-01-01), MacGregor et al.
patent: 4654819 (1987-03-01), Stiffles et al.
patent: 4672612 (1987-06-01), Shishikura et al.

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