The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2002
Filed:
Nov. 17, 2000
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/200 ;
U.S. Cl.
CPC ...
G06F 1/200 ;
Abstract
A cache memory device by which a processing speed can be elevated and which comprises a primary cache memory containing two primary ways of WAY and WAY each retaining a bit LRU and a bit LRU taking either a value or together with data and an address, a primary old way determining circuit for determining, on the basis of patterns of the bit LRU and the bit LRU which is an old way retaining data which has not been accessed for the longest period of time in the primary ways WAY and WAY and a primary cache control circuit inverting only the bits (the bit LRU or the bit LRU ) retained in the old way which has been accessed.