29 Nov
2015
29 Nov
'15
8:59 p.m.
I have hacked my Dallas chips to install a coin cell holder glued to the top, allowing me
to replace the battery at will. There are sites online showing you how to find the
internal contacts. Don't be afraid. The worst thing you can do is ruin the Dallas chip
that is dead anyway. Once you've done one, they get easier.
Ian
Sent from my iPhone
On Nov 29, 2015, at 11:37 AM, Michael Holmes
<mholmes10 at hotmail.com> wrote:
Gurus,
I'm looking for your advice.
My DEC 3000 gave me a POST NVR error and after trying all the steps to fix it (reseating
boards, memory, etc...) it looks like the RTC (DALLAS DS12871A) has died.
Searching on line I found some places marketing a replacement for DS1287 for old PC's
but not sure if any would work for DEC given it had an A at the end in the model number
(different pins etc...)
Given that this sounds like a common problem on early VAXen, I was wondering if of you
have some recommendations on a good source to purchase a replacement RTC that will work
with DEC equipment.
Thanks much!
Mike
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