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:
May. 15, 2001
Filed:
Jun. 08, 1998
Charles Scott Graham, Rochester, MN (US);
Shawn Michael Lambeth, Pine Island, MN (US);
Daniel Frank Moertl, Rochester, MN (US);
Paul Edward Movall, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A primary PCI bus and multiple secondary PCI busses of a PCI expansion card interface, are interconnected by a routing circuit. The routing circuit functions as a switched bridge between the primary PCI bus and each of the secondary PCI busses, respectively, by associating each secondary PCI bus with an address range, and forwarding a command received from the primary PCI bus to a secondary PCI bus mapped to an address range including the address of the command. Furthermore, the routing circuit forwards commands intended for the primary PCI bus from the secondary PCI busses. In addition, the routing circuit directly routes commands between the secondary PCI busses, when commands received from one secondary PCI bus are intended for another PCI bus, without use of the primary bus. As a result, traffic and latency on the primary PCI bus is reduced and efficiency is increased.