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:
Jul. 02, 1996
Filed:
Nov. 28, 1994
Applicant:
Inventors:
Hoichi Cheong, Austin, TX (US);
Kimming So, Austin, TX (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; G06F / ;
U.S. Cl.
CPC ...
39518204 ; 39518505 ;
Abstract
Error correction code ('CECC') generation within a directory or memory controller is distributed between generation of an ECC for the tag and status portions of a directory entry and then summed to produce the ECC bits for the directory entry. The ECC generation may be performed for entries with respect to a cache for a uniprocessor or multiprocessor system or for system memory within such a data processing system. The ECC generation of the present invention reduces by one or more cycles the required time utilized for updating a directory entry.