gtpi1m3ySystem Installation Support Reference

Message Router

The message router exit, COBC, is called by COA4 before routing the message to the application.

This user exit can be used in the following ways:

  1. The text of the message on data level 0 can be altered.
  2. The destination of the message can be changed by altering the destination field in the RCPL.
  3. Additional information can be passed to the destination application by changing the RCPL to the expanded format and adding the general data area.
  4. By inspecting R5 and changing its contents, it is possible to force an I-stream.

Input

R5
Destination I-stream number

D0
Input message in AM0SG format

D1
Reserved

D2
Reserved

D3
Reserved

EBW000-EBWXXX
The RCPL of the destination message (the length depends on whether it is an expanded RCPL and the size of the general data area).

EBX064-EBX103
Reserved

EBROUT
Reserved

CE1DBI
Database ID of the basic subsystem

CE1PBI
Program base ID of the basic subsystem

CE1SSU
Subsystem user ID of the basic subsystem

CE1ISN
Reserved.

Programming Considerations