Using the ENTER key

GDDM V3R2 Base Application Programming Guide

Using the ENTER key

GDDM V3R2 Base Application Programming Guide
SC33-0867-01

Unless the application program has established any special attention-processing functions, the ENTER key (and no other attention key) may be used while GDDM is operating to cause an asynchronous CMS attention interrupt. This suspends the operation of both the application program and GDDM, and causes control to be passed to the terminal user, with the terminal in line-by-line VM READ mode.

In this mode, normal CMS protocols usually allow the terminal user to take one or more of the following actions:

Resume at the point of interruption, by pressing the ENTER key.
Enter an "immediate" CMS command (such as, HI, HO, HT, HX, RO, RT, or SO).
Enter other commands - such commands are stacked for execution at the next entry into normal CMS or CMS SUBSET mode.

After any of the above actions (except HX), GDDM ensures that the screen buffer contents are restored.

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