Common Indicators; System Available - IBM 3270 Operator's Manual

Cursor wrap also occurs when the cursor is moved up or
down. Notice that, in these cases, the cursor reappears in the
same character position (on the opposite edge of the screen) that
it occupied before moving off the screen; there is no shift left or
right. In the examples in Figure 6, pressing and holding the
indicated keys when the cursor is located at A moves the cursor
to B.
let's investigate the display station indicators. You already
know that they are located to the right of the screen on the face
of the display. As you will see, their names alone describe their
functions quite well.
SYSTEM AVAI lABlE, INSERT MODE, and INPUT
INHI BITED are on all display stations. No matter which display
station you have, the purpose and meaning of each of these
indicators are always the same.
The SYSTEM AVAI lABlE indicator, on or off, will not greatly
affect the local operation of your display station. It is only an
indication that the program in the computer is running and, if
your display station has an attached keyboard or selector pen,
that it will accept interruptions from your machine. If the
indicator is not on, the keys that depend on the program to
accomplish their function will not be effective. I n fact, if you
press one of these keys when the system is "not available", the
INPUT INHIBITED indicator will come on and data from your
keyboard will not be accepted. The RESET key (described later
in the "Keyboard" sections) will reset this condition and turn off
the INPUT INHIBITED indicator.
Operating the 3270
Common Indicators
SYSTEM AVAilABLE
Indicator
15
I