Function: tpu-edt-mode

Toggle TPU/edt emulation on or off.
With a prefix argument ARG, enable the mode if ARG is positive,
and disable it otherwise. If called from Lisp, enable the mode
if ARG is omitted or nil.

(fn &optional ARG)

Variable: tpu-edt-mode

Non-nil if Tpu-Edt mode is enabled.
See the command `tpu-edt-mode' for a description of this minor mode.
Setting this variable directly does not take effect;
either customize it (see the info node `Easy Customization')
or call the function `tpu-edt-mode'.