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:
Mar. 08, 1994
Filed:
Oct. 27, 1989
Applicant:
Inventors:
Bruce A Smith, Jupiter, FL (US);
Loc T Tran, Boca Raton, FL (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395325 ; 364229 ; 3642301 ; 3642304 ; 364240 ; 3642404 ; 3642434 ; 3642426 ; 36424292 ; 36424341 ; 3642513 ; 364260 ; 364270 ;
Abstract
A logic controlled gate is inserted in the arbitration logic of a computer system that supports multiple masters on a data bus. In such a system with arbitration for data bus ownership, the gate is so controlled that competitors for the data bus cannot force the main processor (CPU) from the data bus until certain system conditions are met. In particular, a pattern of CPU 'hits' to memory cache is recognized as an opportunity for the CPU to relinquish the data bus.