Re: Tempest Eats EPROMs

Ok. I checksumed the EPROMs I had pulled and they all checked ok. I guess
I'll just pull all of them and spray some contact cleaner in the sockets.

Does anyone have any other suggestions?

-roy-

----- Original Message -----
From: <solarfox@texas.net>
To: <vectorlist@synthcom.com>
Sent: Sunday, October 08, 2000 10:30 PM
Subject: Re: VECTOR: Tempest Eats EPROMs

> On Sun, 8 Oct 2000 21:57:04 -0400, you wrote:
>
> >My vectors are hungry!
> >
> >I'm working on a Tempest board. Self test indicated a bad EPROM. Changed
it.
> >Self test indicated another. Changed it. It worked. Played it. Powered
down.
> >Powered up later, another bad EPROM. Changed it. All worked ok. Put the
> >board away.
> >
> >A week or two later (now), put the board in a machine - bad EPROM.
Changed
> >it. All works ok.
> >
> >WHY? Why are the EPROMs dying? All are original Atari labelled EPROMs. Do
> >they "just go bad"? Should I expect the others to go? Should I replace
them
> >all on general principals? What would you do?
>
> While it is certainly possible for EPROMs to go bad, for a bunch of
> them to go bad in succession like that is suspicious. Personally, I'd be
> more inclined to suspect some of the glue logic in between the ROMs and
the
> CPU - more likely, one of the address decoders or buffers is getting
flaky.
> --------------------------------------------------------------------------
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---
> solarfox@DON'TMESSWITHtexas.net                              (Gary Akins
jr.)
> http://lonestar.texas.net/~solarfox
> --------------------------------------------------------------------------
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