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Dk'tronics Lightpen

176 bytes added, 13:57, 23 October 2009
20 L=H*256+L-12292 : Y=L/40 : X=L-Y*40
 
 
The value 12292 needed to be slightly adjusted to match the monitor being used. This could also be achieved in software by incorporating a simple manual calibration routine.
== Technical ==
Bryce
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