IBM 3174 Reference Guide

Keyboard Extension Mode
The Change-Screen key sequence for 3270 terminals is as follows:
Keyboard Type Key Sequence
Base (Non-Text) ALT-lnsert
Base (Text) ALT-PA2
Base (Alternative) ALT-lnsert
Converged ALT-PA2
Enhanced ALT-Home
For ASCII terminals, see the appropriate keyboard map for your terminal. For 3270
terminals, refer to Figure 1-2 on page 1-8 through Figure 1-4 on page 1-9 for
illustrations of the Change-Screen key locations.
For ASCII terminals, the Change-Screen key sequence is not valid while you are
communicating with or attempting to connect to an ASCII host. If you want to
change sessions, you must return to the Connection Menu.
If the Change-Screen key sequence does not work, see your system administrator
for the correct sequence. The key sequence may have been defined differently
during 3174 customizing.
Keyboard Extension Mode (Extended Select)
Keyboard extension mode works like a keyboard shift. The difference is that a shift
lasts until you press a key to return the keyboard to its normal state, while
keyboard extension mode lasts for only one keystroke. Table 1-1 on page 1-10
tells you how to put your base keyboard into extension mode. For Converged and
Enhanced keyboards, the Extended Select (ExSel) key shifts the keyboard into
extension mode. Refer to the keyboard maps in Appendix A, "Terminal Keyboard
Maps," for the key sequence used to enter extension mode on ASCII terminals.
The extension-mode indicator (•) appears in the operator information area (CIA)
when you enter extension mode. When you press another key, you leave extension
mode and the indicator disappears.
Not all your keys are active while the keyboard is in extension mode. Figure 1-2
on page 1-8 through Figure 1-4 on page 1-9 show the active keys and their
functions.
Figure 1-2 on page 1-8 shows the functions that are active in keyboard extension
mode. However, the following functions are not available when you are using a
3270 terminal as an ASCII terminal:
X.21 Direct
X.21/X.25 Dial
X.21/X.25 Local
X.21/X.25 Comm
X.21/X.25 Disc
Display RTM LTTI
Load Matrix
Null/space processing
Print ID.
1-6 3174 Establishment Controller Terminal User's Reference for Expanded Functions

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English