Re: Asteroids display problem

Doesn't Asteroids take AD561J D-A converters? Could someone in the
Dallas area check Tanners, I thought he had oodles of these fairly
cheap.

Steve Coule wrote:
>
> >>Analog Devices has them for on $13.00 each.
> Really? I thought that was the bare wafer price.
>
> >From analog, the ceramic versions are $37.51 each for 100+ and the plastic
> versions $20.79 each for 100+.
>
> USBID quoted me something like $34 each too.
>
> -----Original Message-----
> From: owner-vectorlist@synthcom.com
> [mailto:owner-vectorlist@synthcom.com]On Behalf Of Joe Bachmann
> Sent: 15 June 2002 20:04
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: Asteroids display problem
>
> Analog Devices has them for on $13.00 each. USBid has some available, but
> their
> minimun is $250 per line item. www.usbid.com
>
> If anyone is interested in a DAC0800, I have some of those for $4.00 each.
>
> JB
>
> Neil Bradley wrote:
>
> > I've got an Asteroids board with a really bizarre problem:
> >
> > http://www.synthcom.com/~nb/asteroids.jpg
> >
> > What you're seeing is the standard test pattern. From what I can gather,
> > the "Y" stepping is completely OK. However, it looks like every 8 or 16
> > "pixels" or so, are rounded down, like it has a bit in one of the X
> > coordinate counters stuck low. When I play the game, all objects look
> > really strange - like every 8 or 16 "pixels" they're looped back around to
> > the current 8 or 16 pixel set rather than extending to the adjacent
> > pixels. This looks to be a "chain link fence" style of problem. Could it
> > be one of the DACs or ....?
> >
> > BTW, Does anyone know of a source for these DACs?
> >
> > I'm curious if A: Anyone has seen this type of problem before, and B: if
> > I'm looking in the right area for the root problem. Thanks!
> >
> > -->Neil
> >
> > --------------------------------------------------------------------------
> -----
> > Neil Bradley "Why does not knowing Jack require you to know
> Dick?"
> > Synthcom Systems, Inc. "One idiot programmer will negate the work of at
> least
> > ICQ #29402898 two competent programmers."
> >
> > --------------------------------------------------------------------------
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Received on Sat Jun 15 17:32:23 2002