Conrad Lawes (Conrad_Lawes@3com.com) from 3Com's Lanworks division has
build the tool imggen to make netboot
images bootable for 3Com netword cards.
The Linux Terminal Server Project
has more information.
Generating Etherboot images with rom-o-matic.net, so old network cards
or network cards wither boot ROM can use PXE. (Use must use at least
version 5.3.14)