If you can get a direct replacement from Mouser (or - try Jameco - they
have some older, stranger stuff; I just bought some 6809s there a few weeks
ago; find anyone else still selling those...) and the restoration project
is worth it to you, I'd do that. Yeah, it's $20 but you'll be good for
another decade and you won't have a grievous hack on the battery :) That's
my stance on it.
I have a couple of old SGI machines where I need to go through the same
process here pretty soon. Should probably do one of my SS20s as well, but
at least those will start up with a dead NVRAM and I have plenty of SBus
NICs with fixed MAC addresses...
On similar topic, let's say an Indigo2 and an Indy take the same model of
Dallas chip (I haven't checked). If the Indigo2's chip still had some
"juice" in it, could you swap it into the Indy and get it to fire up? Or
will I just end up with a corrupted NVRAM that neither system will touch
(don't want that...)?
I have two live Dallas chips that still have "juice" - one in my Indigo2
that I actually run and one in a spare. I'd like to transfer the one in the
spare to my Indy, but I don't want to not ever be able to put the chip back
into an Indigo2.
Best,
Sean
On Mon, Sep 8, 2014 at 10:22 AM, Cory Smelosky <b4 at gewt.net> wrote:
Sent from my iPhone
On Sep 8, 2014, at 9:16, JP Hindin <jplist2008
at kiwigeek.com> wrote:
I have a quadruplet of U5s that has one working NVRAM between them. I
pulled one open to see if I could employ the battery modification that
has
been used by others (several on this list, no
less)... but the U5
appears to have quite a different NVRAM module.
The earlier ones that I've seen modification pictures of have the
'backpack' battery/xtal, and just a potted nub that requires scraping
open
to provide access to the battery contacts.
The U5 NVRAMs are fully encased in a plastic housing that appears to be
epoxy bonded onto the IC/battery/xtal.
Are these also modifyable, or should I suck it up and pay $15 a NVRAM at
Mouser?
What model NVRAM from mouser?
Thanks;
- JP