IBM 3174 Reference Guide

Using Your Terminal as a DEC VT220
VT100 National Language Support
You can generate characters not engraved on the 3270 keyboard by entering
Extended Graphics mode and using the National Replacement Character Set
(NRG). Refer to the Extended Graphics keyboard layouts in Appendix A, "Terminal
Keyboard Maps."
You can generate all the characters defined in the DEC National Replacement
Character (NRC) sets except for five characters in Netherlands (see Table 2-5).
These characters indicated as "Not mapped" in the following figure cannot be
displayed on the 3270 screen and cannot be generated from 3270 keyboards. If
they are received from the host ASCII application, they appear as blanks on the
3270 screen.
Table 2-5. VT100 Emulation: NRC Mapping Limitations for Netherlands
DEC NRC ASCII Code
CECP-Capable Non-CECP-Capable
Character Value
3270 Terminal
3270 Terminal
% 40
Not mapped
ij 5B
Not mapped
Not mapped
Vz 5C
Not mapped
/ 7C
Not mapped
Not mapped
Va 7D
Not mapped
You can generate the characters that are defined in the DEC National Replacement
Character set (NRC) but not engraved on the 3270 keyboards by pressing ALT-Shift
to enter Extended Graphics mode. This mode allows only one keystroke.
Using Your Terminal as a DEC VT220
When you use your 3270 terminal as a VT220you can use many applications
developed for the DEC VT220. For more information about actual VT220 operation,
refer to the DEC VT220 User's Guide.
Using Your Keyboard
Many keys on the 3270 terminal keyboard have different functions when your
terminal is acting as a DEC VT220. Referring to Appendix A, "Terminal Keyboard
Maps,"
select the VT220 keyboard map that corresponds to the type of 3270
keyboard you are using. For example, ifyou are using a Converged keyboard, see
the map called "Using a 3270 Converged Keyboard as a DEC VT220 Keyboard" on
page A-31. Ifyou are not sure what type of 3270 keyboard you have, see the
keyboard diagrams in Chapter 1, "Getting Started."
Typematic Keys
A typematic key is a key that repeats its function when you hold it down. All keys
that are typematic on your 3270 keyboard continue to be typematic, including Tab,
Return, and keys pressed with CTRL.
Chapter 2. Using a 3270 Terminal to Connect to ASCII Hosts 2-11

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English