XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Countdown XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
 
                       A nice assignment for STARTOFF
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STARTOFF is a reserved variable on the HP49 which runs each time when the
calculator turns off, either by itself after 5 minutes, or after the time
coded in the reserved variable TOFF (1 minute is a good choice). 

Store Countdown or its program in STARTOFF. If then the 49 is ON but idle,
STARTOFF makes first a garbade collection - to avoid spontaneous garbage
collection in applications - and then starts its 10-seconds-countdown by
displaying little numbers. Any key just interrupts the countdown. If this
is CANCEL, the 49 turns off. Countdown will not run if being in edit mode
(while programming, say) since then more time is needed, in general.    
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 Wolfgang Rautenberg - raut@math.fu-berlin.de - www.math.fu-berlin.de/~raut