Screen Character Capacities - IBM 3270 Operator's Manual

Screen Character Capacities
As you know, the 3275 and 3277 Display Stations can have either a large
screen (I920-character capacity) or a small screen (480-character capacity).
Your 3278 Display Station can have only one physical screen
size~
but six
screen formats are available: 480 characters (12 lines of 40 characters
each), 960 characters (12 lines of 80 characters each), 1920 characters
(24 lines of 80 characters each), 2560 characters (32 lines of 80 charac-
ters each), 3440 characters (43 lines of 80 characters each), or 3564
characters (27 lines of 134 characters each).
If your organization uses both 3275/3277 and 3278 Display Stations, you
may work with programs that use both groups of display stations. These
programs can format the screen of your 3278 in the same way that they
format a 3275 or 3277 screen.
To enable the 3275/3277 programs to use both groups of display stations:
The 960-character 3278 can be formatted as a 480-character display.
The 2560-, 3440-, and 3564-character 3278 can be formatted as
1920-character displays.
Some programs may use the large format, and other programs may use the
smaller format. Therefore, if you use a 960-, 2560-, 3440-, or 3564-
character 3278, the program may switch the screen format between the
large format and the smaller format for different transactions.
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