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Input/Output Block (IOB) z/OS DFSMSdfp Advanced Services SC23-6861-01 |
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The input/output block (IOB) is used for communication between
the problem program and the system. It provides the addresses of other
control blocks, and maintains information about the channel program,
such as the type of chaining and the progress of I/O operations. You
must define the IOB and specify its address as the only parameter
of the EXCP or EXCPVR macro instruction. See Input/Output Block (IOB) Fields.
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Copyright IBM Corporation 1990, 2014
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