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:
Feb. 24, 1981
Filed:
May. 02, 1979
Allen G Taylor, Westminster, CA (US);
Robert E Cichon, San Diego, CA (US);
Wayne J Lewis, Escondido, CA (US);
NCR Corporation, Dayton, OH (US);
Abstract
A processor having a pipeline architecture is comprised of a plurality of replaceable circuit units and includes a snapshot circuit associated with each replaceable circuit unit. Each snapshot circuit has a snapshot register for storing the signals at test points in its associated replaceable circuit unit in response to either an immediate snapshot command or a delayed snapshot command being executed by a processor. A command-under-test passing through the processor results in the signals at the test points. The delayed snapshot command delays the storing of the signals by the snapshot register so that by preceding the command-under-test by a delayed snapshot command, the signals at test points in the execute stage of the processor are stored during the execution of the command-under-test.