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:
Mar. 31, 1987
Filed:
Dec. 28, 1984
Patrick F Dutton, Endicott, NY (US);
International Business Machines, Armonk, NY (US);
Abstract
An apparatus is disclosed which detects the existence of an error, in a computer system, corrects the error, and takes steps to ensure that the error will never again re-occur. The error resides in the integrity of data stored in a main memory. When the data is read from memory and found to be erroneous, the data is corrected and stored in a spare portion of a small alternate memory array. In addition, the identity of the corrected data is also stored in the alternate memory array. During a subsequent read of the data from the main memory, the alternate memory array is simultaneously consulted. The identity of the corrected data, stored in the alternate memory array, is compared with the incoming address, and the corrected data is read from the spare portion of the alternate memory array. As a result, the erroneous data is not reproduced during a subsequent read of the data from the main memory.