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. 28, 1989
Filed:
May. 15, 1987
Donald W Smelser, Bolton, MA (US);
James C Stegeman, Acton, MA (US);
Lawrence A Chisvin, Sudbury, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A method and apparatus for error detection is disclosed. A data word and its check bits are read from memory, and new check bits are generated form the data word read. A logical operation is performed between the new check bits and the check bits read from memory to generate a syndrome. The syndrome is decoded to detect the presence or absence of an uncorrectable error. If an uncorrectable error is detected, a logical operation is performed between the new check bits and a byte write error code to generate a third set of check bits, which are then written into memory along with the data word.