По рекомендации Digi

В случае rtgnda необходимо раскоментарить секцию [NETADDRESS] в \IBMCOM\macs\RTGNDA.NIF и прописать что-то вроде NETADDRESS="123456789123" в секции [RTGNDA_nif] файла \IBMCOM\PROTOCOL.INI

набортная карточка сети заработала !!!

Installed this board with Phenom II 955 (X4).

Using Realtek MultiMAC driver included with eCS 2.1 (R8110.OS2 version 1.2 beta). NIC does not work with default driver options as it gets assigned a null MAC address.

However, after specifying the network adapter address parameter (NETADDRESS) of the driver in MPTS, the NIC works well. It took a few tries to find a valid MAC address value; simply typing random digits is not guaranteed to work. Here's a hint from David Azarewicz:

"You have to be careful of the 2 least significant bits of the most significant byte. They are flag bits and normally must be zero. In other words, 112233445566 would not be a valid MAC address, but 102233445566 would be."

Best advice it to use the actual hardware MAC. You can find this out by hitting F8 on the BIOS boot screen and choosing to boot from the LAN (PXE remote boot). The MAC address will be displayed while the system waits for the network; write it down and then reboot.

Note 1: this trick specifically works with version 0.1.2 beta of R8110.OS2; it may not work with later versions!

Note 2: the trick also works with the RTGNDA.OS2 driver available through os2warp.be.