[rescue] Netra t1 battery?

[systems_glitch]

It's a CAPHAT, there's a battery and a clock crystal in there. You can
still get them new from electronics suppliers like Mouser:

https://www.mouser.com/ProductDetail/STMicroelectronics/M4T28-BR12SH1?qs=Mu9A%252BxKg3hTJ1rbHObpv1g%3D%3D

I'd thought about doing a replacement board that takes a CR1225 in a
holder, as I've done with the repair boards for other Sun NVRAMs, but at
$5/ea it's probably not worthwhile until the CAPHAT assemblies get EOLed.

Thanks,
Jonathan

On Wed, Sep 25, 2019 at 10:16 AM Mouse <mouse at rodents-montreal.org> wrote:

> I've got a Sun Netra t1 which complains on poweron that
>
>  WARRNING: NVRAM battery is either bad or just replaced!
>
> The battery is a removable thing that sits on top of another chip.
> It's a little four-pin thing.  I could, maybe, find a replacement, but
> I was first wondering if (a) there's more to that piece than just the
> battery and (b) if not, if enough is known to replace it with an
> external battery, a la the hackery people have done with the
> battery-backed SRAM chips for things like the SS20.
>
> The removable piece is marked
>
>           ODDXRXX5
>         M4T28-BR12SH1 .
>         TIMEKEEPER .
>         SNAPHAT . A
>         LITHIUM BATTERY
>
> It's possible the Xs are semantically zeros; I rarely see zeros slashed
> that thoroughly, though, and there's nothing on there that I am sure is
> intended to be a zero.
>
> Any thoughts?
>
>                                         Mouse
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