--- gforth/vt100.fs	1994/04/20 17:23:24	1.1
+++ gforth/vt100.fs	1999/02/03 00:10:22	1.3
@@ -1,10 +1,37 @@
 \ VT100.STR     VT100 excape sequences                  20may93jaw
 
+\ Copyright (C) 1995 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., 675 Mass Ave, Cambridge, MA 02139, 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
+  \G take place at column u1, row u2 of the display. (column
+  \G 0, row 0 is the top left-hand corner of the display).
+  1+ swap 1+ swap ESC[ pn ;pn [char] H emit ;
+
+: page ( -- ) \ gforth
+  \G Clear the display and set the cursor to the top left-hand
+  \G corner.
+  ESC[ ." 2J" 0 0 at-xy ;