Lunar Lander - minor graphics problem

I have a Lunar Lander board that has a 'minor' graphics problem - when the
screen is 'static' it's reasonably okay, BUT the landscape looks slightly
thicker and more jagged/stepped than it should. This has the effect that
when the landscape scrolls, the vectors that make up the landscape appear
to 'flicker'. It's rather hard to explain without seeing it, but it looks
like the 'steps' are rapidly moving up and down as it scrolls.

I've tried two other Lunar Lander boards in the same cab and they are fine,
ie nice smooth lines so it's definitely just restricted to this one board.

It's not a big deal but it IS irritating and I'd like to fix it if I can.

It's not the DACs or the op amps - maybe one of the caps in the final
output section near the pots?

Thanks,
Phil

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Received on Thu Sep 12 14:05:05 2002