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. 29, 2003
Filed:
Mar. 31, 1999
Richard Bealkowski, Redmond, WA (US);
Patrick Maurice Bland, Raleigh, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer system with a shared-buffer memory includes a plurality of interconnected host systems. Each of the host systems includes system random access memory, with a portion of the system random access memory defined as shared-buffer memory. A system memory controller determines if the host has updated the shared-buffer memory, and if so, signals that the shared-buffer memory has been updated. This signal is accomplished by initiating a PCI Special Cycle which indicates the location and length in the shared-buffer of the update. A buffer control and interconnect device receives the signal from the system memory controller that the shared-buffer memory has been updated, reads the update from the shared-buffer memory, and exports the update. The exported update is received at the buffer control and interconnect device of each of the other host systems. The receiving buffer control and interconnect device writes the update to its shared-buffer memory.