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:
Sep. 02, 1997
Filed:
Mar. 21, 1995
Gerald George Isaac, Sunnyvale, CA (US);
John K Langgood, Boca Raton, FL (US);
Wan Lin Leung, Raleigh, NC (US);
Kimberly Kibbe Sendlein, Boca Raton, FL (US);
John Joseph Szarek, Cary, NC (US);
Edward Yee, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer system that has a main memory and a writeback cache memory also has an I/O device capable of data streaming. A memory controller responds to signals that the I/O device will perform a burst transfer of data to the main memory and blocks potential writebacks from the cache memory to the I/O device. Potential writing over of the data from the I/O device by a flushed cache line written back to the main memory is thereby prevented. The system performance is increased since the data from the I/O device can be written to the main memory without waiting for a snoop cycle and a writeback to be performed.