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:
Jun. 09, 1987
Filed:
Mar. 18, 1985
James A Katzman, San Jose, CA (US);
Joel F Bartlett, Palo Alto, CA (US);
Richard M Bixler, Sunnyvale, CA (US);
William H Davidow, Atherton, CA (US);
John A Despotakis, Pleasanton, CA (US);
Peter J Graziano, Los Altos, CA (US);
Michael D Green, Los Altos, CA (US);
David A Greig, Cupertino, CA (US);
Steven J Hayashi, Cupertino, CA (US);
David R Mackie, Ben Lomond, CA (US);
Dennis L McEvoy, Scotts Valley, CA (US);
James G Treybig, Sunnyvale, CA (US);
Steven W Wierenga, Sunnyvale, CA (US);
Tandem Computers Incorporated, Cupertino, CA (US);
Abstract
In a multiprocessor system of the type in which two or more separate processor modules are connected by an interprocessor bus dedicated exclusively to interprocessor communication for parallel processing, there is provided an input/output system having multiported device controllers connected to the multiprocessor system by input/output buses. Each device controller is shared by pairs of the processor modules, and includes logic that ensures that only one port is selected for access at a time.