There is a lot of good information about NVRAM replacement in the article at:

http://www.squirrel.com/squirrel/sun-nvram-hostid.faq.html

I was able to use the information on that page to figure out how to use a 
dremel tool to grind into a dead NVRAM that was in a Sparc IPC I bought on 
eBay, solder in leads to an external 3  volt lithium battery, reprogram all 
the info and get it initialized to work without any error messages.


Scott Stevens
stevenss@tcfreenet.org