The esc-data BASIC program specifies
that the code generated by pressing ESC (control [) is to be passed
through as data.
Note: This command does an implicit set-esc off to disable the special UNIX-related signal handling.
Warning: The ESC key can have a special meaning in D3 (that
is, it pushes a level). This command makes D3 ignore the ESC key,
and it passes on through as if it were any other ordinary character.