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How the IBM-Supplied Output Writer Routine Works z/OS JES2 Initialization and Tuning Guide SA32-0991-00 |
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As stated previously, there are two main pieces to the external writer that can be modified or replaced by the installation: The output writer routine and the output separator routine. When the external writer is called, it gets control in module IASXWR00. The main function of IASXWR00 is to initialize a 7-word parameter list for the use of the other external writer routines. The parameter list contains information about the output device and DCB addresses for each data set. The input data set to the external writer was a job's output data set which met the criteria for processing by the external writer. This input data set is not yet open. The format of the external writer parameter list is as follows:
The switches indicated by the three high-order bit settings in byte 0 can be used in translating control character information from the input records to the form required by the output device. |
Copyright IBM Corporation 1990, 2014
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