Minimum BMS function assumes that the principal facility of your task is the mapping device that performs input and output mapping operations for the features and status that is defined in the TCTTE (Terminal Control Table entry).
The principal facility for transactions using BMS function should have a device type supported by BMS. However, the MAPPINGDEV facility is an extension of minimum BMS that allows you to perform mapping operations for a device that is not the principal facility. When the MAPPINGDEV request completes, the mapped data is returned to the application. BMS does not have any communication with the MAPPINGDEV device.
You can specify the MAPPINGDEV option on the RECEIVE MAP command (see the CICS® Application Programming Reference manual ) and the SEND MAP command, (see the CICS Application Programming Reference manual ) but not on any other BMS command.
The TERMID specified in the MAPPINGDEV option must represent a device in the 3270 family supported by BMS. If the device is partitioned, it is assumed to be in base state. Outboard formatting is ignored.
Data is mapped in exactly the same way as for minimum BMS, and there is no need to change mapset definitions or to re-generate mapsets.
This chapter describes:
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