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:
Aug. 17, 1993
Filed:
Oct. 31, 1990
Daniel L Nay, Palos Verdes, CA (US);
Darryl K Korn, Laguna Beach, CA (US);
John T Ralph, Mission Viejo, CA (US);
Control Data Systems, Inc., Arden Hills, MN (US);
Abstract
In a computer system that contains plural computer resource elements, such as multiple processor and memory units, with those elements communicating digital information over a common communications bus, high communications bus efficiency is achieved. An interface permits each of said processor and memory elements to individually and independently access either the data bus, without busying the address bus, or the address bus without busying the data bus, with bus access being limited to a fixed interval of time. Different ones of said processor and memory units may thus simultaneously transfer digital information over the respective address and data bus. The foregoing system includes a bus contention and priority protocol to eliminate the possibility of data collision and includes identification lines for identifying each processor element accessing the bus.