Re: 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 08:02:07 2003