Topic       : The GFA-BASIC Toolkit - Volume 1
Author      : John L. Hutchinson
Version     : GFA_TKV1.HYP v0.50 (7/14/2008)
Subject     : GFABASIC/Documentation
Nodes       : 164
Index Size  : 3048
HCP-Version : 5
Compiled on : Atari
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@help       : Help
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@hostname   : THING   
@hostname   : STRNGSRV
@hostname   : HIGHWIRE
@hostname   : CAB     1.01                           setup_alt_screen                           3.07+

BRIEF:  Initializes alternate screen

 FILE:  ALT_SCRN.LST

 CALL:  setup_alt_screen

   EX:  setup_alt_screen

PARMS:  None

 INIT:  None

  USE:  Call this procedure to prepare one or more background video screens for
        use with the various graphics and video effects routines.

  REM:  By defining the addresses of different sections of screen memory, you
        may easily perform special effects such as drawing on a background
        screen while the user views the physical screen.

 NOTE:  None

HINTS:  Use the get_degas routine to load a picture file to a hidden background
        screen and then "pop" it to the foreground screen with the copy_screen
        routine.

 ALSO:  set_screen, copy_screen

   BY:  John Hutchinson