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:
Mar. 04, 1997
Filed:
Oct. 03, 1994
Ravi K Arimilli, Round Rock, TX (US);
John M Kaiser, Cedar Park, TX (US);
William K Lewchuk, Austin, TX (US);
Michael S Allen, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A multiprocessing system utilizes a bus protocol having two response windows. The first response window is at a fixed latency from the transmission of a bus request and/or address, while the second response window, utilized for coherency reporting, is placed a configurable number of clock cycles after the bus request and address to allow for longer access, or snoop, times to perform a cache directory look-up within other bus devices. The first response window reports error or flow control and error status. Furthermore, a method had been described, which implements the reporting of response information in a flexible and high performance manner.