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:
Dec. 01, 1992
Filed:
Oct. 05, 1990
Applicant:
Inventors:
George J Barlow, Tewksbury, MA (US);
Donald L Smith, Bedford, MA (US);
Assignee:
Bull HN Information Systems Inc., Billerica, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395575 ; 371 12 ;
Abstract
A multiprocessor system includes a plurality of identical central subsystem (CSS) units, a plurality of memory and input/output (I/O) subsystem units which connect in common to an asynchronous bus system. Each CSS subsystem unit includes a cancel command mechanism for enabling each such unit to effectively withdraw from the asynchronous bus or switch the state of a resource such as a memory or I/O lock mechanism included in such subsystem without otherwise disturbing the state of such subsystems.