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:
Jun. 05, 2012
Filed:
Feb. 14, 2008
Louis W. Ricci, Hyde Park, NY (US);
Mark P. Bendyk, Hyde Park, NY (US);
Scott M. Carlson, Tucson, AZ (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Roger G. Hathorn, Tucson, AZ (US);
Catherine C. Huang, Poughkeepsie, NY (US);
Matthew J. Kalos, Tucson, AZ (US);
Gustav E. Sittmann, Webster Groves, MO (US);
Harry M. Yudenfriend, Poughkeepsie, NY (US);
Louis W. Ricci, Hyde Park, NY (US);
Mark P. Bendyk, Hyde Park, NY (US);
Scott M. Carlson, Tucson, AZ (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Roger G. Hathorn, Tucson, AZ (US);
Catherine C. Huang, Poughkeepsie, NY (US);
Matthew J. Kalos, Tucson, AZ (US);
Gustav E. Sittmann, Webster Groves, MO (US);
Harry M. Yudenfriend, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer program product, an apparatus, and a method for processing communications between a control unit and a channel subsystem in an input/output processing system are provided. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method including: sending a message from the channel subsystem to the control unit in a first mode; receiving a response from the control unit and determining from the response whether the control unit supports a message protocol; and responsive to the message protocol being supported by the control unit, sending another message using the message protocol from the channel subsystem to the control unit to determine whether the control unit supports a second mode.