            Windows
            -------

   This is a machine code program
with three Basic procedures.
Normal text windows simply wipe
out the area of the screen over
which they are placed, this piece
of code copies that area into
Sideways RAM before defining a
window and copies back when the
window is closed.  It is perfectly
possible to overlap subsequent
windows - closing a window always
returns you to the previous window
at the correct cursor position and
with the correct colours.

   The three procedures provided
are contained within a short
demonstration program on this disc
(called "Windows"), they are :

 PROCinit  - Initialise workspace,
             note: change 'slot=4'
             as appropriate.

 PROCopen(x1,y2,x2,y1,f,b)
           - Open a window at the
             given co-ordinates,
             set foreground colour
             to f, background to b.

 PROCclose - Close last window.

See Acorn User December 1986 for
further details.

