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. 06, 1993
Filed:
Oct. 01, 1990
Michael A Callander, Hudson, MA (US);
Linda Chao, Chelmsford, MA (US);
Douglas E Sanders, Framingham, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A write-back cache memory system is disclosed which includes a source of a sequence of memory addresses and a tag store coupled to the source of addresses and accessed by an index portion of said addresses, which produces information relating to the addresses. The write-back cache memory system also includes an error detector for detecting an error in the tag store information. Circuitry is included for reporting an error and saving the index which caused the error if an error is detected but no error has been previously detected. Comparing circuitry is included for comparing the index causing the current error to the previously saved address if an error is detected and an error has been previously detected; and if the address is not the same, then reporting a fatal error; otherwise, if the index is the same, then not reporting a fatal error.