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. 23, 1988
Filed:
May. 02, 1986
Michael D Smith, Winchester, MA (US);
Llewelyn S Dunwell, Lynn, MA (US);
Richard A Lemay, Carlisle, MA (US);
Robert C Miller, Braintree, MA (US);
Theodore R Staplin, Jr, Chelmsford, MA (US);
William E Woods, Natick, MA (US);
John L Curley, North Andover, MA (US);
Honeywell Information Systems Inc., Waltham, MA (US);
Abstract
A data processing system includes a central processor unit (CPU), a main memory and a memory management unit (MMU). Information is stored in main memory in segments, each segment being identified by a segment descriptor stored in a translation table in the MMU. Logical addresses from the CPU address segment descriptors in the MMU's translation table. These segment descriptors include the physical address of the location in main memory of the first word of the segment. If the segment descriptor is not in the translation table location, then the MMU operation is suspended while the segment descriptor is demand fetched from main memory.