SparcBook Tadpole

Dave McGuire mcguire at
Wed Aug 11 13:44:47 CDT 2010

On 8/11/10 2:37 PM, Eric Smith wrote:
> On 08/11/2010 07:37 AM, dwight elvey wrote:
>>   With the help of Jim S and Dave McGuire, I got my Spacrbook working.
>> It does have an issue. It says the clock it not working and needs to be
>> set. I opened is up to clean any remaining KOH from leaky NiCads
>> and saw it had one of those MK48T02B chips in it.
>>   I tried doing a search on google for anyone hacking these chips
>> to replace the battery but all I got were chip sales.
> ST absorbed Mostek some years back, so the prefix changed from MK to M,
> but they're still made.  You can get a brand new M48T02 from Digikey for
> $20.10:

  Note that an nvramrc may be required for these newer parts to work in
some Suns.  I don't recall how this came up, but it was in my notes from
about ten years ago.  Here's what you'd need to do at OBP:

ok nvedit
ok nvstore
ok setenv use-nvramrc? true


Dave McGuire
Port Charlotte, FL

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