[geeks] Sun CMOS PROM again..

[Walter Belgers]

On 12 dec. 2012, at 19:08, Jochen Kunz wrote:
>> Does this process work for the PROM from an Ultra 2?
>> http://gigawa.lt/gigawa.lt/Sun_NVRAM.html
> Yes. But I do it a bit different: I "dig" into the resin just enough to
> get to the positive (top) pole of the battery by filing it down from
> the top. I disconnect the wire that comes from below from the battery
> and solder a wire to it. This goes to the + of the new battery. - of
> the new battery gets connected to pin 12 of the chip as this is GND.
> This is a minimal invasive method for connecting a new battery.

Good to say I haven't made that page for nothing :-)

Jochen, do I understand correctly that you leave the old battery basically
where it is and solder a new battery in parallel with it?

Walter.
--
Walter Belgers
walter at belge.rs -=- http://belge.rs/