How do I get a larger UdelVM screen?

The program that gives you the UdelVM screen (and mvs) screen is called x3270. This is an X-client that emulates an IBM 3270 display station in a window. The font it uses is especially designed for this function and is a fixed size. This font is also designed for a 75 dot per inch display and will look about 25% smaller on a 100 dot per inch display such as the the NCD X-terminals.

There is another way to emulate a 3270 terminal. This is to run the unix program called tn3270 is an xterm window. Since an xterm window can have any sized fonts, you can make the window bigger. There are some trade offs between x3270 and the xterm/tn3270 combination.

 Advantages                   x3270           xterm/tn3270
 Small self-contained client    x               
 Uses color for highlighting    x
 Copy and Paste with mouse      x               x
 Use the mouse to move cursor   x
 Any sized fonts                                x
 Full ebcdic character set      x
 Status line                    x
 Numeric keypad for numbers                     x

If you want to use tn3270 on the X-terminals, then copy the file

   cp ~dnairn/tn3270.ad ~

and add the following line to your .xsession file:

xrdb -merge tn3270.ad

Finally, add an alias to your .alias file (or .cshrc file)

   if $?DISPLAY then
     alias tn3270 'xterm -name tn3270  -e tn3270 \!* &'
   endif

June 19, 1994