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. 27, 1990
Filed:
Jul. 06, 1987
Applicant:
Inventor:
Keith D Matteson, Austin, TX (US);
Assignee:
Motorola Computer X, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364200 ; 3642426 ; 3642428 ; 3642427 ;
Abstract
A bus arbiter for a multi-processor computer provides fair access by dynamically adjusting a base variable of a counter which is determined from a processor number of a previously access-requesting processor having the highest processor number. The counter then varies priority between a minimum processor number, such as zero, and the base variable of the counter. The priority signal from the counter and the current access-requesting processors are then provided to a memory device. The memory device is used to determine which current access-requesting processor is permitted to access the bus.