On Tue, 2 Jan 2001, Ben Greear wrote:
> Some additional notes: I had the same bad results trying to set
> the mac on a tulip based NIC with kernel 2.2.17. Using the tulip-diag
> tool, I was able to see that the original MAC was still reported by
> the NIC, but ifconfig showed the one I had tried to set.
>
> Hopefully I'm missing some simple detail/command??
The tulip-diag and rtl8139-diag programs have _almost_ all of the code to
change the station address for most of the supported chips(1).
But people are almost always wrong about their reasons for wanting the
station address _permanently_ changed, so I frequently leave the actual code
disabled in the diagnostic programs.
The complex part of the code is there, and has been tested. For instance,
see the comment in rtl8139-diag.c:
____
/* Caution! This routine works!
It will permanently change the EEPROM contents.
"You could put an eye out with that thing." */
static int do_update(long ioaddr, unsigned short *ee_values,
The missing code is just
--------
if (set_hwaddr)
for (i = 0; i < 3; i++)
do_update(ioaddr, eeprom_contents, 7 + i, "Station address",
(new_hwaddr[i*2]<<8) + new_hwaddr[i*2+1]);
Note: The 21041 and PNIC-1 (82c168 and '169) use unique EEPROM access
methods. I don't think that it's possible to write the 21040 EEPROM.
Donald Becker becker@scyld.com
Scyld Computing Corporation http://www.scyld.com
410 Severn Ave. Suite 210 Second Generation Beowulf Clusters
Annapolis MD 21403 410-990-9993
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