Re: Dead Black Widow board

Walt wrote:

>Screen2 produces the crosshatch pattern and the character set.

So your text is perfectly fine in this screen. Not scrambled like the other text?

If so, the problem is definitely not in the vector generator section, otherwise you
would not be able to get good characters anywhere.

So... I would verify the CPU->Vector Address selector MUX's with signatures if possible.

My guess is that the CPU address bus is not making it past the MUX's properly?

jess

>The only other problem is with
> the screen with the squares which reduce in size (to test the scalability).
> The squares reduce in size fine, but with each decreasing box, there is
> supposed to be an accompanying tone - I only get a static click (and yes the
> pokey are good).
>
> I have a feeling the error is probably showing up in the first diagnostic
> screen - but its unreadable.
>
> Walt
>
> ----- Original Message -----
> From: chumblespuzz <chumblespuzz@home.com>
> To: <vectorlist@synthcom.com>
> Sent: Monday, April 10, 2000 11:04 PM
> Subject: Re: Dead Black Widow board (was: Re: VECTOR: Trouble with WG6100)
>
> > Hi Walt,
> >
> > I had two BW boards with similar probs, and each one had a bad AM6012. The
> > only way I know how to check that, however, is to remove the old one,
> solder
> > in a socket and try a new one.
> >
> > Good luck!
> > -roy-
> >
>
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Received on Tue Apr 11 13:05:18 2000