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. 31, 1993
Filed:
Oct. 05, 1990
George J Barlow, Tewksbury, MA (US);
Donald L Smith, Bedford, MA (US);
Bull HN Information Systems Inc., Billerica, MA (US);
Abstract
A multiprocessor system includes a plurality of identical central subsystem (CSS) units, a plurality of memory subsystem units and input/output units which connect in common to a system bus. Requests are transferred between a pair of units on a priority basis defined by a distributed bus priority network included as part of the system bus. Each CSS unit includes cycle stealer logic circuits which grant bus cycles on a round robin basis. The cycle stealer logic circuits are connected to receive high priority request signals from the network and refuse acceptance of a cycle granted to such CSS unit as a low priority requester thereby passing it along to a next lower priority CSS unit.