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:
Jan. 03, 1995
Filed:
Aug. 19, 1993
Applicant:
Inventors:
Atsushi Fujihara, Kawasaki, JP;
Takeshi Kitahara, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; G06F / ;
U.S. Cl.
CPC ...
395425 ; 364D / ; 36424341 ; 36424234 ; 3642525 ; 3642543 ;
Abstract
A comparing unit compares an address of data written into a main memory by an external device with an address of data stored in a cache memory, and a masking unit masks specific bits obtained by a result in said address comparing unit. An invalidating unit invalidates data stored in the cache memory corresponding to the specific bits masked by the masking unit. Therefore, inconsistency between the main memory and the cache memory can be prevented, even when the data are transferred by using a block transfer process.