Need help with 3c905b problem

[Jim McQuillan <jam@McQuil.com>]

I'm having a problem with the flash rom on a 3c905b.

I've programmed a bunch of the roms in the past, and they worked
fine.  Now, I have a batch of cards, and the flash roms don't work.

When the chip is in the card, the PC starts to boot, then after testing
memory, the screen clears and it starts the POST again.  It just
continues
this forever.  It is doing this on two different systems.  On a third
system,
it goes through the self test, then hangs at the 'Update ECSD
Successfully'
message.  It just sits there forever.

Two of these 3 systems have worked in the past with 3c905b's, so I'm
pretty
sure it's not the systems.

I take the chip out, and the pc boots fine from hard disk.  I can run
the
3com configuration utility, and it shows that the bootrom socket is
enabled.

I've checked the PCI vendor and device ID's, they are fine.

When I took the chip out, and ran the config utility, it shows that the
boards were manufactured on 12/29/1999.  On the board, it is marked 'Rev
A'.

This worries me.

I'm thinking that 3com has made a design change that renders the
standard
etherboot code broken.

Any ideas?

Thanks,
Jim McQuillan
jam@ltsp.org
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