08117347 cites 170 patents.

An computer program product, apparatus, and method for facilitating input/output (I/O) processing for an I/O operation at a host computer system configured for communication with a control unit. 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. The method includes the host computer system obtaining a transport command word (TCW) for an I/O operation. The TCW specifies a location of one or more I/O commands and a flag. The flag is set to indicate that the location is an indirect address. The host computer system extracts the location of the one or more I/O commands and the flag from the TCW. The host computer system gathers the one or more I/O commands responsive to the location specified by the TCW and the flag, and then forwards the one or more I/O commands to the control unit for execution.

Title
Providing indirect data addressing for a control block at a channel subsystem of an I/O processing system
Application Number
12/31201
Publication Number
8117347 (B2)
Application Date
February 14, 2008
Publication Date
February 14, 2012
Inventor
Catherine C Huang
Poughkeepsie
NY, US
Ugochukwu C Njoku
Yonkers
NY, US
Gustav E Sittmann
Webster Groves
MO, US
Dale F Riedy
Poughkeepsie
NY, US
Matthew J Kalos
Tucson
AZ, US
Daniel F Casper
Poughkeepsie
NY, US
John R Flanagan
Poughkeepsie
NY, US
Agent
John Campbell
Cantor Colburn
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 3/00
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