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| From: Rachy (all posts)
Date: 1999-03-18
Subject: Lightpen
|
Ahojka!
Yesterday midnight I checked out the programs for the lightpen. I was not able to figure out how horizontal position is being measued. Vertical easy, when the sign coming in from the pen
(joybutton press), then it simply reads $FF1D.
There is an other strange feature (or probably I am underinformed):
writing $FF both $FD30 and $FF08 then reading means both joy button read. (That I heard once.) But: reading $FD0D? Is this some kind of mirroring $FF08? Or a direct read from the joy?
Does anybody know more about these topics?
Bye:
Rajnai Almos
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