Prior to invoking this service, your exit routine must place the following information into BLSABDPL:

• If your exit routine wants to invoke an exit verb name, set field ADPLPEFG to contain zeros, and set field ADPLPEVB to contain the requested verb name, such as ASMDATA.
• If your exit routine wants to invoke a particular type of exit, set the appropriate bits in field ADPLPEFG. For example, set bit ADPLPEPN to invoke the print nucleus exit.
• If your exit routine wants to execute an IPCS subcommand or an IPCS command procedure, set the ADPLPESC bit in the ADPLPECT parameter list and set ADPLPEPL to the address of a standard TSO command buffer that contains the text to be processed. These fields are described in the BLSABDPL mapping macro. (See z/OS MVS™ Data Areas in the z/OS® Internet Library: &zosliburl;.