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:
Nov. 22, 2005
Filed:
Mar. 29, 2002
Timothy C. Bronson, Vestal, NY (US);
Stefan P. Jackowski, Endicott, NY (US);
John M. Sheplock, Raleigh, NC (US);
Phillip G. Williams, Owego, NY (US);
Timothy C. Bronson, Vestal, NY (US);
Stefan P. Jackowski, Endicott, NY (US);
John M. Sheplock, Raleigh, NC (US);
Phillip G. Williams, Owego, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An opaque memory region for a bridge of an I/O adapter. The opaque memory region is inaccessible to memory transactions which traverse the bridge either from a primary bus to secondary bus or secondary bus to primary bus. As a result, memory transactions which target the opaque memory region are ignored by the bridge, allowing for the same address to exist on both sides of the bridge with different data stored in each. The implementation of the opaque memory region provides a means to complete memory transactions within I/O adapter subsystem memory, hence, relieving host computer system memory resources. In addition, a number of I/O adapters can be used in a host computer system where the host and all the I/O devices use some of the same memory addresses.