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:
Mar. 16, 1982
Filed:
Feb. 04, 1980
Applicant:
Inventor:
Roy K Tanikawa, Irvine, CA (US);
Assignee:
General Automation, Inc., Anaheim, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364200 ;
Abstract
In a digital processing system in which a plurality of control units communicate with each other and with memory over a common bus, an arbitration circuit associated with each of the control units tests for priority among the units requesting access to the bus, granting access to the highest priority unit as soon as the bus is not busy. Priority is determined by priority numbers assigned to each unit. Priority is tested simultaneously in each unit in synchronism, each unit using common lines on the bus for both input and output to establish which unit has highest priority.