Subject: Re: Netbooting uVAX II
To: Greg Ingram <firstname.lastname@example.org>
From: Nigel and Delores Johnson <email@example.com>
Date: 06/21/1999 13:10:22
1) Use a packet sniffer as others have suggested
2) Try to read the little label on the prom that gives it its address.
Usually lost at this stage in the game.
3) Do what I do (old CE trick) examine the registers. The address is
The DEQNA is usually at 17774440 octal. You can read the ethernet address
here. If yours is there, do the following: I'll give you an example from one
of mine. My MAC address is 08002B029707 (0800 indicates DEC MFR)
>>> e/p 20001920
p 20001920 FF00FF08
p 20001924 FF02FF2B
p 20001928 FF07FF97
Ignore the FF's
Read the complete bytes from right to left staring at 1920:
FF00FF08 becomes 0800
FF02FF2B becomes 2B02
FF07FF97 becomes 9707
There you have the hardware address encoded in PROM!1
To convert a device from octal (PDP qbus) to HEX MVII Qbus) do the following:
convert to hex
ad 2000000 hex.
The standard alternate address is 17774460. ==> 14460 ==> 0x1930 ==>
Hope this helps
Greg Ingram wrote:
> Okay, I've now got a working serial console. Now I'm trying to netboot
> this beast. From the (somewhat outdated?) netbooting HOWTO, it seems that
> I need to know my ethernet address. The HOWTO lists two possibilities,
> neither of which seems to work on the uVAX II. Or perhaps it's that the
> DEQNA needs a different command.
> Anybody know how to get the ethernet address from either the >>> prompt or
> from VMS 4.2?
> - Greg