IBM 3174 Reference Guide

MLT with PCs in 3270-Emulation Mode
Alternate Change-Screen Key Sequences
The Change-Screen key sequence on a Base (Non-Text) keyboard is as follows:
1. Press and hold ALT.
2. Press the Insert key (normal Change-Screen key).
IfALT-lnsert does not perform the Change-Screen function on the terminal, you can
use the alternate Change-Screen key sequence that Is provided when the keyboard
Is in extension mode. See Table 1-1 for the MLT Change-Screen key sequence to
use for your terminal.
For example, If you are using a 3194, perform the following steps:
1. Press and release the Extension Mode key.
2. Press the Insert key.
Table 1-1. Alternate Change-Screen and Extension-Mode Key Sequences
Product MLT Change-Screen Key
Extension-Mode Key
Base (Non-Text)
Press and hold ALT; then
press the Insert key
(normal Change-Screen
key).
Press and hold ALT; then
press ERASE EOF.
PC or PS/2 with 3270
Emulation Program, Entry
Level, or similar 3270
emulation program
Press and release the
Extension Mode key,
followed by the Insert key.
Defined in 3174
customizing question
168. See your system
administrator.
3270 Personal Computer
Press and release the
ExSel key; then press the
Insert key.
ExSel.
3194 Display Station
Press and release the
ExSel key; then press the
Insert key
ExSel.
MLT with Personal Computers in 3270-Emuiation Mode
An IBM Personal Computer (PC), Personal System/2* (PS/2), 3270 PC, or 3194
Display Station, emulating a 3270 terminal operating In Control Unit Terminal (CUT)
mode, may not send all keystrokes to the 3174 Establishment Controller. For
example, many key sequences that require an ALT-Shlft are Ignored by the
emulation program and are not sent to the 3174. Because of this feature, you might
need to use a different set of keystrokes on a PC emulating a 3270 than on an
actual 3270 terminal. In most cases. It is possible to obtain patches or newer
source code that passes these expanded function keystrokes to the 3174. It Is also
possible to use the alternate keystroke sequences defined for these functions when
the keyboard is in extension mode.
The Change-Screen key sequence on a 3270 Personal Computer or 3194 Display
Station is Extended Select (ExSel) followed by the Insert key. You can access
different sessions from an IBM Personal Computer or Personal System/2 (PS/2) by
doing the following:
1. Press and release the Extension Mode key.
2. Press the Insert key.
1-10 3174 Establishment Controller Terminal User's Reference for Expanded Functions

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English