Multiplexed directory for dedicated cache memory system

Details Multiplexed directory for dedicated cache memory system Multiplexed directory for dedicated cache memory system

1978-10-02

1980-10-14

Atkinson, Charles E.

Boots, shoes, and leggings

G06F 1300

Patent

active

042285038

ABSTRACT:
Apparatus for avoiding ambiguous data in a multi-requestor computing system of the type wherein each of the requestors has its own dedicated cache memory. Each requestor has access to its own dedicated cache memory for purposes of ascertaining whether a particular data word is present in its cache memory and of obtaining that data word directly from its cache memory without the necessity of referencing main memory. Each requestor also has access to all other dedicated cache memories for purposes of invalidating a particular data word contained therein when that same particular data word has been written by that requestor into its own dedicated cache memory. Requestors and addresses in a particular cache memory are time multiplexed in such a way as to allow a particular dedicated cache memory to service invalidate requests from other requestors without sacrificing speed of reference or cycle time of the particular dedicated cache memory from servicing read requests from its own requestor.

REFERENCES:
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patent: 3735360 (1973-05-01), Anderson et al.
patent: 3848234 (1974-11-01), MacDonald
patent: 4048671 (1977-09-01), Callahan et al.
patent: 4056844 (1977-11-01), Izumi
patent: 4070706 (1978-01-01), Scheuneman
patent: 4136386 (1979-01-01), Annunziata et al.
patent: 4141067 (1979-02-01), McLagan
patent: 4142234 (1979-02-01), Bean et al.
patent: 4144566 (1979-03-01), Timsit
patent: 4157587 (1979-06-01), Joyce et al.

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