I've got eight old 48T02 NVRAM chips whose batteries ahve run down.
I'd like to reconstruct the MAC address and hostid values corresponding
to them; all but one of them still has its barcode sticker (and I don't
expect to get anything useful for the one that's lost its sticker :-).

Mark Henderson's NVRAM FAQ says that Sun can reconstruct this given the
barcode (or, possibly, the four-character code also prinetd on the
sticker), but does not say how.  Is that algorithm known, or partially
known?  If not, I'll volunteer to collect data points to try to work it
out, if people with still-good NVRAMs will send their barcode and/or
four-character codes to me with the Ethernet address and hostid that
correspond.  (I've got only three live samples in my own collection,
not really enough to tell much from.)  I'll also be looking at mine to
see if there is an obvious correspondence between barcodes and
four-character codes.

The newer sort, the 48T08 sort, don't need this, since the last three
octets of the MAC address are identical to the low three bytes of the
hostid, and are printed under the barcode.  It's just the old sort I'm
interested in here.

Any information appreciated.

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