Re: Rip Off

        There's no separate watchdog reset circuit on a Cinematronics
board like there is on other boards. It's been a while, but I believe the
CPU must set some value every couple of ticks of the vector timer, or else
it times out like a watchdog. I remember Zonn M. talking about it in
detail a couple of years ago, but I've pretty much forgotten the details.

        From a practical point of view, you have to dig through the
processor innards (not blindly -- you can just backtrack from the LED) to
fix reset problems like the one described.

Joe

On Sat, 25 Nov 2000 MKDUD@aol.com wrote:

> In a message dated 11/25/00 6:16:30 PM Eastern Standard Time,
> chumblespuzz@home.com writes:
>
> << I'm working on my Rip Off.It's dead, but the sound board is ok. The LED on
> the main PCB is lit continuously. The manual says it should flash on once
> upon power up. Any suggestions where to start? >>
>
> I think you get this if your reset line is stuck?? Have you checked the
> watchdog??
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------------------------------------------------------------------
Joseph J. Welser jwelser@ccwf.cc.utexas.edu
Design Engineer -- Crystal Semiconductor Corporation
Work: jwelser_at_crystal.cirrus.com http://www.crystal.com
P.O. Box 17847; Austin, TX 78760
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Received on Mon Nov 27 18:00:04 2000