RE: Asteroids - jagged vectors

From: Neil Bradley <nb_at_synthcom.com>
Date: Wed Apr 16 2003 - 15:50:23 EDT

> >>do they look kin of like an ekg?
> Kind of. If they were on a horizontal line, they would look like this,
> except the "-" line would match up with the top of the "/" marks:
> __/-/___/-/___

That looks to me like you've got a stuck bit in the X axis. I had
something similar happen to me on my Asteroids:

http://www.synthcom.com/~nb/asteroids.jpg

Turned out to be bit 5 going to the DAC was stuck low because it had a cut
trace to the DAC. I'd stick a logic probe on the inputs to the X DAC and
see if all bits are toggling.

Other problems could be the latch feeding it or the X DAC itself.

-->Neil

-------------------------------------------------------------------------------
Neil Bradley In the land of the blind, the one eyed man is not
Synthcom Systems, Inc. king - he's a prisoner.
ICQ #29402898

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Received on Wed Apr 16 12:50:26 2003

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