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:
Aug. 10, 2010
Filed:
Jul. 03, 2008
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Paul S. Frazer, Poughkeepsie, NY (US);
Kenneth J. Oakes, Wappingers Falls, NY (US);
John S. Trotter, Pleasant Valley, NY (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Paul S. Frazer, Poughkeepsie, NY (US);
Kenneth J. Oakes, Wappingers Falls, NY (US);
John S. Trotter, Pleasant Valley, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A bi-directional and full duplex facility for permitting both the IO processor and the Channel to write CCA messages on their respective queues at the same time. IOP messages to the channel are stored on the TO_CHN queue and Channel messages to the IOP on the TO_IOP queue. CCA Queues replace hardware CCAs due to increasing transmission capabilities of current IO processors and Channel processors. Even though the mechanism is similar, the present invention provides some benefits in the use of signaling. The IOP does not have to signal the Channel each time it puts something on its outbound queue. Each queue contains multiple slots. This allows the IOP and Channel to write multiple messages on the targeted queue without encountering a CCA busy signal. The actual queues are now structured in hardware system memory.