Writing network device driver for Linux

http://linuxgazette.net/156/jangir.html

Rtl8139:

http://www.linuxforum.net/forum/showflat.php?Cat=&Board=driver&Number=635688&fpart=1&PHPSESSID=

http://linux.chinaunix.net/bbs/viewthread.php?tid=1095257&extra=&page=1

PCI:

http://www.linuxforum.net/forum/showthreaded.php?Cat=&Board=linuxK&Number=635418&page=&view=&sb=&o=