Round robin replacement for a cache store

Details Round robin replacement for a cache store Round robin replacement for a cache store

Filed on

1977-12-22

Date issued

1980-03-25

Examiner

Chapnick, Melvin B.

Patent Class

Boots, shoes, and leggings

Other Related Categories

G06F 1300, G11C 906

Type

Patent

Status

active

Patent number

041953436

Description

ABSTRACT:
During system initialization, a cache is completely loaded with valid information from main memory. The directory and data buffer are organized in levels of memory locations. Each level of the directory and data buffer is loaded in turn from main memory. Round Robin apparatus, which is preset during system initialization, identifies the next level into which a replacement data word is written on a first in-first out basis. The round robin count for each address location of cache indentifying the next level to be written is stored in a random access memory (RAM). The contents of a particular address location of RAM is incremented each time replacement information is written into that address location in cache.

REFERENCES:
patent: 3820078 (1974-06-01), Curley et al.
patent: 3840862 (1974-10-01), Ready
patent: 3896419 (1975-07-01), Lange et al.

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