IBM SC34-6814-04 - Manual (Page 271)

UEPTCTTE
Address of the terminal control table terminal entry (TCTTE). The
TCTTE can be mapped using the DSECT DFHTCTTE.
UEPTIOA
Address of the terminal input/output area (TIOA). Your exit program
should not change the address. The TIOA can be mapped using the
DSECT DFHTIOA. However, fields TIOASAL and TIOASCA are not
programming interfaces.
Note: In certain circumstances—for example, when XZCOUT is
invoked before the send of a NULL RU—UEPTIOA contains
zeroes.
Return codes
UERCNORM
Continue processing.
XPI calls
All can be used. However, we do not recommend that you use a GETMAIN
call to obtain terminal-class storage for use as a replacement TIOA. This is
because there are several internal pointers to the TIOA, and if any one of
these is not updated the application may experience problems.
Exit XZCOUT1
When invoked
Before a message is broken into RUs.
Exit-specific parameters
UEPTCTTE
Address of the terminal control table terminal entry (TCTTE). The
TCTTE can be mapped using the DSECT DFHTCTTE.
UEPTIOA
Address of the terminal input/output area (TIOA). Your exit program
should not change the address. The TIOA can be mapped using the
DSECT DFHTIOA. However, fields TIOASAL and TIOASCA are not
programming interfaces.
Return codes
UERCNORM
Continue processing.
XPI calls
All can be used. However, we do not recommend that you use a GETMAIN
call to obtain terminal-class storage for use as a replacement TIOA. This is
because there are several internal pointers to the TIOA, and if any one of
these is not updated the application may experience problems.
XZIQUE exit for managing MRO and APPC intersystem queues
You can use the XZIQUE exit to control the number of queued requests for
sessions on MRO and APPC connections.
Note:
v Queued requests for sessions are known as “allocate queues”.
Chapter 1. Global user exit programs 249