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:
Apr. 13, 2004
Filed:
Feb. 27, 2002
James R. Magro, Austin, TX (US);
Stephen C. Ennis, Austin, TX (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
An arbitration mechanism for an input/output node of a computer system. An arbitration mechanism includes a buffer circuit for storing received control commands corresponding to a posted virtual channel and a second virtual channel. Each of the control commands includes an identifier value indicative of the source of the control command. A tag circuit that may generate a tag value for each of the control commands prior to the control commands being stored. The tag value may be indicative of an order of receipt of each of the control commands relative to other control commands and may be dependent upon the identifier value. In addition, an arbitration circuit may arbitrate between control commands stored within the buffer circuit dependent upon the tag value of each of the control commands. The arbitration circuit may select, independently of the tag values, a given control command and having a flag bit set.