[rescue] rescue DBlade 100 NVRAM replacement

[Chris Quayle]

On 11/11/20 18:00, rescue-request at sunhelp.org wrote:

>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 11 Nov 2020 00:17:28 +0000
> From: Peter Stokes<peter at ashlyn.co.uk>
> To: The List<rescue at sunhelp.org>
> Subject: [rescue] Blade 100 NVRAM replacement
> Message-ID:<3A41B203-7E92-4D10-9384-C86DFDE6A0E8 at ashlyn.co.uk>
> Content-Type: text/plain; charset=us-ascii
>
> Hi All
>
> Given the original M48T59 and a replacement I found of DS1553 are both end of
> life, anyone found another NVRAM which will work in the Blade 100?
>
> Sadly the ones I use in the Ultra 5/10 etc do not work in the OBP 4.X systems
> such as the Blade 100/150.
>
> Peter
> Sent from my iPad
>

Peter,

Usually a lurker on list, but have done several idprom batteries this
year, as I work work through a decades old sun collection.

Originally, used to epoxy a battery on top of the idprom, but that
looks a bit untidy and not enough clearance for sbus cards in ss20
and similar.

Procedure now is to mill the epoxy to find the wires as usual, make
a break in one of the old cells, solder a couple of wires and epoxy
a small pcb mount battery holder to the end of the prom. Takes about
an hour with quick set epoxy and is robust and quite neat. Using a
CR2032 cell, a much higher capacity and should last 15 years or
more, cheaper too. If you are local, (Oxford) happy to help with this...

Regards,

Chris