Re: Asteroids rapair saga

So, your saying that the beeps count until the bad RAM is found - in the
order you've given. The manual says it should always give you 6 beeps, but
for the bad part the beep sound is much lower. Is that not correct?

I have rplaced all the RAMS's for know good ones - no change.

When I peek around the address lines of the vector ROM, they aren't all
alive, some are stuck either high or low. I suspect this is not normal, even
in test mode, Am I correct?

Many thanks for your reply!

Mendel
----- Original Message -----
From: <steve@coule.freeserve.co.uk>
To: <vectorlist@synthcom.com>
Cc: <mypearl@dds.nl>
Sent: Monday, May 19, 2003 5:01 PM
Subject: Re: VECTOR: Asteroids rapair saga

> It's most likely a dead 2114 ram at E2. You don't get six beeps unless
it's P4 that's dead - the beeps stop when the first bad ram is detected.
>
> 1 beep = D2
> 2 = E4
> 3 = M4
> 4 = R4
> 5 = N4
> 6 = P4
>
> Steve
>
> >
> > From: "MyPearl" <mypearl@dds.nl>
> > Date: Mon 19/May/2003 11:59 GMT
> > To: <vectorlist@synthcom.com>
> > Subject: VECTOR: Asteroids rapair saga
> >
> > Hello group,
> >
> > I've been working on my project Asteroids for a few weeks now, and I
could
> > use a little help with it now. :)
> >
> > The board (rev 4) was completely dead, watchdog resets were constantly
> > happening. That was fixed by installing a new CPU and ROM at D/E1. To be
> > safe, I replaced the 245 buffer as well.
> >
> > A tip in the 'Asteroids repair enceclopedia' suggested to disconnect the
> > /DMAGO signal by desoldering LS43 at L6 and lifting pin 1.
> >
> > Now the board does run, no more watchdog resets. In test mode, I can see
two
> > beeps passing along on my scope (I have the board running at my bench
off a
> > single 5V power supply). Not the sequence of six beeps, as described in
the
> > manual.
> >
> > I don't really know where to look further, so any help would be GREATLY
> > appreciated!
> >
> > Cheers,
> >
> > Mendel
> >
> >
>
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Received on Mon May 19 09:05:02 2003