🚀 go-pugleaf

In <32F66272.2339@cngp.cng.com> Ian Crozier <icrozier@cngp.cng.com> writes:

>My first byte is 72 on a Sparc20 and my Ethernet address starts
>8:0, so I guess that in your case the 80 of hostid and 8:0 of the
>ethernet address is just coincidence.

>My last six characters are the same on both, so I guess that's
>universal on Sun equipment.

>Can anyone add more enlightenment?

Yes. Sun ethernet adresses all start with '8:0:20'. As for the first byte 
of the host ID, this is what's referred to as the machine type, and it is 
stored in location 0x01 of the NVRAM. 

Here's a list of machine types for machines that use an NVRAM to store 
their ethernet address and serial number data (they're in hex remember):

42 - 3/80
51 - 4/60 (SS1)
52 - 4/40 (IPC)
53 - 4/65 (SS1+)
54 - 4/20 (SLC)
55 - 4/75 (SS2)
56 - 4/25 (ELC)
57 - 4/50 (IPX)
61 - 4/E  (SparcEngine)
71 - 4/6xx
72 - SS10 and SS20
80 - seems to be just about everything else (perhaps not the Ultra's though)

The Host ID is four bytes - the most significant being the machine type
value stored in location 0x01 of the NVRAM, and the last three being the
hex representation of the serial number. On Sun-4c machines at least, the
serial number is stored in locations 0x0c, 0x0d and 0x0e in the NVRAM. 

If you install an NVRAM programmed with an incorrect machine type you'll 
see messages about this when your machine boots, but it should still work 
fine.

Regards,

Craig.
-- 
        Craig Dewick - craig@zeta.org.au - http://www.zeta.org.au/~craig  
            Professional Train Driver. Located in Sydney, Australia.
          Sun Ripened Kernels - http://www.zeta.org.au/~craig/srk.html
                Surplus and pre-loved Sun Microsystems equipment.