grub is stuck with an on-board eepro100

[Yedidyah Bar-David]

Hello,

First, Thank you for your time devoted to grub. I use it as a boot
menu for a few tens of PCs that boot from the network.

Now, to my problem:
On 2 different machines with an on-board eepro100, grub is loaded
successfully from the tftp server, but freezes shortly after.
On other machines with an on-board eepro100 it works well, as well
as on machines with a PCI card eepro100.

I #defined DEBUG 1 at the beginning of eepro100.c, with grub 0.91,
and this is what I get:
=========================================================================
CLIENT MAC ADDR: xx xx xx xx xx xx  GUID: xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx
CLIENT IP: xxx.xxx.xxx.xxx  MASK: 255.255.255.0 DHCP IP: xxx.xxx.xxx.xxx
GATEWAY IP: xxx.xxx.xxx.xxx
Found Intel EtherExpressPro100 at 0x1400, ROM address 0x0000
Probing...[Intel EtherExpressPro100]Ethernet addr: xx:xx:xx:xx:xx:xx
Setup_eaddr:
00031A80  00 00 01 00 A0 56 02 00 00 D0 B7 B8 16 FF 00 00
00031A90  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
transmitting type 0800 packet (576 bytes). status = A000, cmd=0100
txfd:
00031A80  00 00 0C 40 80 1A 03 00 90 1A 03 00 00 80 20 02
00031A90  EC 7B 06 00 0E 00 00 00 EC 7C 06 00 40 02 00 00
s1 = 0000, s2 = A000.
.
========================================================================
The last 4 lines repeat (without DEBUG, I only get the "." repeating).

This machine does boot well with pxelinux (from syslinux), and Linux
also works well, including doing dhcp and mounting nfsroot.

Besides hoping for a solution, I have a question: Is it possible to
add a pseudo-driver that will use the PXE? How difficult would it be
for me to do, assuming I don't have much experience with such low-level
programming.

Thanks,

        Didi