Re: Clear screen command?

[Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk>]

To clear a screen on any ISO 6429 compatible terminal (that's
everything claiming to be VT100 or ANSI or xterm compatible),
just use procedures such as

-- warning: the following code is untested

with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;

procedure Clear_Screen is
begin
  put(ESC & "[2J");
end;

procedure Goto_XY(Row, Column: Natural) is
begin
  put(ESC & "[");
  put(Row);
  put(';');
  put(Column);
  put('H');
end;

For all the VT100/ISO 6429 commands, see for instance 

  http://www.fh-jena.de/~gmueller/Kurs_halle/esc_vt100.html

Completing the above into a nice ISO6429 package for controlling
text terminals is left as a small exercise to the reader.

Hope this helped ...

Markus

-- 
Markus G. Kuhn, Security Group, Computer Lab, Cambridge University, UK
email: mkuhn at acm.org,  home page: <http://www.cl.cam.ac.uk/~mgk25/>