Re: question

>I just converted Tempest to MH. The display 'flickers' during certain parts
>of the gameplay,
>like when there's a lot on the screen (though not always), particularly
>during certain
>mazes. However, it's real stable other times.

It's dropping out of frame rate. Basically the vector generator isn't able
to finish all its drawing in less than about 1/30th of a second and you're
seeing flicker as a result. Star Wars does this sometimes actually-- get a
lot of active laser towers shooting at you at once before the trench scene.

You can speed things up by switching the main crystal on the game PCB. How
fast you can make it go depends on the monitor though.

I think "stock" dedicated boards were 12.096MHz. I've seen conversions
with 8MHz crystals on them. Anyone know for sure what's right? If your
crystal is 8MHz try replacing it with a 10MHz and see if everything still
looks right. It will affect the gameplay a little.

-Clay

Clayton N. Cowgill Engineering Manager
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/\ Diamond Multimedia Systems, Inc. clay@supra.com
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Received on Mon Sep 8 10:09:01 1997