Providing indirect data addressing in an input/output processing system where the indirect data address list is non-contiguous
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United States of America Patent
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Mar 5, 2013
Grant Date -
Jun 2, 2011
app pub date -
Feb 10, 2011
filing date -
Feb 14, 2008
priority date (Note) -
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Abstract
Systems, methods and computer program products for providing indirect data addressing at an I/O subsystem of an I/O processing system. 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 receiving a control word for an I/O operation. The control word includes an indirect data address for data associated with the I/O operation. The indirect data address includes a starting location of a list of storage addresses that collectively specify the data, the list spans two or more non-contiguous storage locations. Data is gathered responsive to the list. The gathered data is transmitted to a control unit in the I/O processing system.
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