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I just finish building Tennis For Two based on ATMEGA µc according on this article : http://www.evilmadscientist.com/2008/resurrecting-tennis-for-two-a-video-game-from-1958/
But I have a strange problem. Scope display all I need but the ball goes to the opposite and don't pass above the net. For example, when the left player serves, the ball goes to the... left.
All seem to be well wired, the display is good. I don't find why the ball goes to the wrong way. Any idea ?