
Program:        BIOS Window Extension
Command:        WINDOW (R,C) TO (R,C)
Display:        Color graphics or
                Monochrome display

   This  program defines a window on the screen in which all 
subsequent  activity will   take   place.    The   window  is 
specified by giving the  coordinates  of the  upper  left and 
lower right corners in terms of rows and columns.  The upper left 
corner of the screen is (0,0).  The format of the command  is  
fairly  free, the  only  requirements  are  that  each coordinate  
pair  start  with   a   left parenthesis and be separated by a 
comma. The  format shown above is suggested for clarity of 
interpretation.

   The  areas  outside  of  the  current window may be written to 
directly by any of the usual commands (in your  favorite 
language)  which allow direct coordinate specification.

Copyright 1984, John J. Seal, The Graphic Software Company.
This program is placed in the public domain. You are  welcome  to  
extend  or modify it. If  you do so, please respect my copyright 
notice and insert a record  of modification history.
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