🚀 go-pugleaf

In article <4nlekl$9q7@jedi.apana.org.au>,
Craig Dewick <cdewick@jedi.apana.org.au> wrote:
>In <4njo52$rl2@samba.rahul.net> mch@squirrel.com (Mark Henderson) writes:
>
>>The easiest thing to do is buy a new NVRAM chip. This should run you
>>about $20. You need an SGS Thomson M48T02. 
>
> . . .     make the NVRAM battery last as long as there is a need for it,
>not some paltry 4 to 5 years. Building in a DS-1633 or similar means the
>lithium cell can be recharged quickly when main power is available, and
>then the cell is fully charged everytime main power fails (mains failure,
>or the machine is switched off normally).
  
    Considering all the really stupid mistakes that computer companies
make, using a MK48T02 in the Sun 3/80 and Sparcstations was only a
small blunder. It didn't bankrupt the company. Sun got its money and
the users didn't have problems until years later. The SGS Thomson
M48T02 replacement is good for 10 years. I'd be inclined to chop off
the top of the old MK48T02, remove the clock crystal and resolder it
and then glue and solder on a surface mount battery holder. Then you'd
have what they sould have done in the first place. Have a way to
replace the battery for $1 to $3 instead of the $50 to $150 Sun
charges.
-- 
   Michael Coughlin      mikc@gnu.ai.mit.edu      Cambridge, MA USA