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:
Jan. 06, 1976
Filed:
Dec. 10, 1973
Applicant:
Inventors:
Glenn D Grant, San Jose, CA (US);
David E Chambers, Cupertino, CA (US);
Assignee:
Amdahl Corporation, Sunnyvale, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06f / ;
U.S. Cl.
CPC ...
3401725 ;
Abstract
Disclosed is a method and apparatus for program event recording in a data processing system and is used, for example, in debugging programs. A program event occurs whenever an address in the data processing system falls within a range between a control lower address (DTCL) and a control upper address (DTCU). The system detects a program event without degrading system performance using carry-lookahead adder structures which implement four inequality relationships.