Input to IKTCASX1

Register 0:

Address of the buffer where the message will be built

The buffer size is equal to the total size of the following, up to a maximum of 160 characters:

Size of the message text
A 4-byte length field for each line of text in the message
Eight bytes for control characters

Register 1:

Address of the message definition

This message can be the default IBM-supplied TSO/VTAM message or a TSO/VTAM message that is defined to the MVS™ Message Service (MMS) for a particular language.

Each line of message text is preceded by a 4-byte field. The end of the message is indicated by a final 4-byte field set to 0. The format of the message is shown in the following figure:

Figure 1. Format of the IKTCASX1 message

4-byte field, text line 1, 4-byte field, text line 2 ... 4-byte field set to 0

Register 10:

Address of the IKTWESTD control block (see IKTWESTD). (The terminal type is defined in the WETMTP field of the control block.)

Locks:

None

Processing mode:

TCB