--- gforth/vt100.fs	1995/11/07 18:07:04	1.2
+++ gforth/vt100.fs	1999/03/23 20:24:20	1.4
@@ -23,6 +23,15 @@ 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 ( -- ) \ gforth
+  \G Clear the display and set the cursor to the top left-hand
+  \G corner.
+  ESC[ ." 2J" 0 0 at-xy ;