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:
Sep. 27, 1988
Filed:
Oct. 01, 1986
Steven D Lewis, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A memory device for storing data and providing address and data line error detection is disclosed. A memory holds two copies of data, each copy of data having opposite parity dependent on its address. An address sequencer provides addresses to the memory. The addresses are modified to select the copy of data in the memory having a predetermined first parity. A parity checker checks the parity of data provided by the memory and provides an error indication if the parity is incorrect, said error indication being indicative of address and data line errors and memory cell errors. When an error is indicated by an error latch, the error causes a retry of the memory in the location where the desired data is stored with parity opposite the first parity.