Display Functions Mode on HP Crts
When a program is not working as expected on an HP
terminal, turn on Display Functions using the F7 key
of Modes keys or Esc-Y.
You can then see the
that are sent and received. Remember to turn off Display Functions .
Unless you are on a network you see the DC1 that MPE prints
to indicate it is ready for input. When you press Return you
see a CR and LF echoed to the tscreen.
The NUL character (binary 0, ^@) is
usually stripped by the terminal interfaces and will not appear.