lab 6 networking..

hi,

I'm having trouble with understanding Lab-6 Network Concept, especially "8254x_GBe_SDM.pdf - PCI/PCI-X Family of Gigabit Ethernet Controllers Software Developer’s Manual"

Can you suggest me anything about this subject? or how (which path did you follow) did you write your own E1000.c code, may you give a lead to us?