Under SunOS, you can use the program called
"eeprom" to dump out most
of the important contents. As far as restoring it, I'm not sure about
that, as I don't know what ROM-based code the very early SPARCbooks use.
One way to do it might be to read it out using an EPROM programmer.
My Data I/O supports the MK48T02, for example.
I think I can read it with my programmer. At least with an adapter to make
it think it is a 2716.
I tried the "eeprom" and it didn't work :(
This must be before someon realized it was a good idea. Acording
to the history page I saw, the SparcBook was relatively early in
the history of things.
Do you think I could use the program adb with /dev/nvram?
Could I use it to display and or edit the nvram values?