--- gforth/vt100.fs	1994/04/20 17:23:24	1.1
+++ gforth/vt100.fs	2003/08/25 14:17:47	1.9
@@ -1,10 +1,37 @@
 \ VT100.STR     VT100 excape sequences                  20may93jaw
 
+\ Copyright (C) 1995,1999,2000,2003 Free Software Foundation, Inc.
+
+\ This file is part of Gforth.
+
+\ Gforth is free software; you can redistribute it and/or
+\ modify it under the terms of the GNU General Public License
+\ as published by the Free Software Foundation; either version 2
+\ of the License, or (at your option) any later version.
+
+\ This program is distributed in the hope that it will be useful,
+\ but WITHOUT ANY WARRANTY; without even the implied warranty of
+\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+\ GNU General Public License for more details.
+
+\ You should have received a copy of the GNU General Public License
+\ along with this program; if not, write to the Free Software
+\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
+
 decimal
 
 : pn    base @ swap decimal 0 u.r base ! ;
 : ;pn   [char] ; emit pn ;
 : ESC[  27 emit [char] [ emit ;
-: at-xy 1+ swap 1+ swap ESC[ pn ;pn [char] H emit ;
-: page  ESC[ ." 2J" 0 0 at-xy ;
+
+: at-xy ( u1 u2 -- ) \ facility at-x-y
+  \G Position the cursor so that subsequent text output will take
+  \G place at column @var{u1}, row @var{u2} of the display. (column 0,
+  \G row 0 is the top left-hand corner of the display).
+  1+ swap 1+ swap ESC[ pn ;pn [char] H emit ;
+
+: page ( -- ) \ facility
+  \G Clear the display and set the cursor to the top left-hand
+  \G corner.
+  ESC[ ." 2J" 0 0 at-xy ;