[vcf-midatlantic] GW-48T02-1 a Replacement for 48T02 RTC/NVRAM Batteries

systems_glitch systems.glitch at gmail.com
Tue Aug 1 16:38:59 EDT 2017

Yes :)


Not having the RTC, and specifically not having the exact RTC that the Sun
expects are a deal-breaker: it'll keep the machine from auto-booting even
if everything else is fine. Plus, the little modules are much cheaper than
any other solution.


On Tue, Aug 1, 2017 at 4:19 PM, Ethan <telmnstr at 757.org> wrote:

> I've got a pile of old Sun boxes I'm going through, dealing with dead
>> NVRAMs of course. I ordered some ST 48T02 replacements from Mouser, only
>> to
>> find out they're not 100% compatible. So, since I was going to have to
>> modify a whole bunch of old 48T02s, and there are space constraints on
>> some
>> of the systems, I designed a little module with a CR1225 and crystal to
>> totally replace the CAPHAT on a 48T02. Here's the writeup:
>> http://www.glitchwrks.com/2017/08/01/gw-48t02-1
>> I've got 100x on order, in panels of 10. If anyone is interested in some
>> bare panels, assembled modules, or complete 48T02 replacements, let me
>> know!
>> I'll be doing other modules for the 48T08 and probably one to turn a
>> DS12885 into a DS12887.
>> Thanks,
>> Jonathan
> Have you looked at the FRAM chips? Wouldn't have a RTC but can prob shed
> the battery.

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