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:
Jul. 21, 1992
Filed:
Oct. 29, 1990
Applicant:
Inventor:
Dennis M Kalajainen, Manassas, VA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370 852 ; 370 851 ;
Abstract
The invention discloses a single competitor arbitration code for determining if only one communications module is contending for a communication data bus and gives that module access within two bus clock cycles. An aggregate code is generated by using the true and complement of the module ID. A check code for each bit is determined by adding the aggregate code for the bit and its adjacent bit. If the check code contains any zeros, then more than one module is contending for the bus. The 10-bit single arbitration scheme allows for error detection and correction on a 32-bit data bus.