call TSDSN(length, message)
TSDSN writes a message to the terminal, and waits for the user to enter a reply. The reply is stored in the "KIN" buffer where it can be accessed by a call to TSACC. This is of particular use when dealing with a VIP terminal in forms mode.
If you really are working with a VIP in forms mode, STX and ETX characters should not occur within the message. TSS will add them as appropriate.
The cursor remains positioned as the result of the last TSDSN transmission.
expl f77 lib tsacc
expl f77 lib tsdsp
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