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. 29, 1992
Filed:
Oct. 25, 1988
Bernard Stumpf, Chelmsford, MA (US);
George M Stabler, Nashua, NH (US);
Richard G Bahr, Cambridge, MA (US);
Stephen J Ciavaglia, Nashua, NH (US);
Barry J Flahive, Westford, MA (US);
Hugh Lauer, Concord, MA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A computer system having a plurality of processors sharing common memory and data bus structures and operable to perform atomic operations which comprise several instruction actions, wherein the processor performing the atomic operation prevents memory access interruptions by other processors by locking out other processors during the atomic operation. The system bus includes signal paths accommodating bus lock request and bus lock signals which are provided and received by each processor, which signals are initiated by specific bus lock and lock release instructions added to each processor instruction set.