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. 21, 1999
Filed:
Sep. 09, 1996
David Adrian Tatosian, Stow, MA (US);
Donald Wayne Smelser, Bolton, MA (US);
Paul Marshall Goodwin, Littleton, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
An adjustable filter for a computing system having memory error detecting and correcting features selectively masks user-specified errors, thereby preventing storage of such errors in a control and status register (CSR). The invention includes a command and data register 102; a CSR 103; an error detecting and correcting circuit 108, including a check bit generator 108a, an error detecting circuit 108b, and an error correcting circuit 108c; a memory module 114; and filter logic 300. The contents of a filter control register 220 of the CSR 103 operate to specify a particular error which is to be 'filtered'. The filter logic 300 includes a plurality of logic gates that compare the user-specified signals stored in the register 220 with error-related signals reported by the error detecting circuit 108b. If the signals match, information associated with the detected error is prevented from being stored in the CSR 103.