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:
Nov. 19, 1996
Filed:
May. 02, 1994
Mark Timko, Portland, OR (US);
Scott D Rodgers, Hillsboro, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A method and apparatus for determining if an effective address for a memory access in a computer processor is above an expand-down memory segment. The apparatus comprises a memory segment limit comparison circuit. The segment limit comparison circuit tests every memory access to determine if the memory access reaches above the top limit of an expand-down memory segment. The comparison circuit consists of an adder that adds an effective address of the memory access to an access.sub.-- size value. The access.sub.-- size value consists of the size of the memory access to be performed minus one in the low order bits and a series of '1' bits in the high order bits necessary to generate a carry if the memory access reaches above the top limit of the expand-down memory segment.