I was almost
like they were re-inventing Ethernet. :-)
When Sidhu started on that project
ethernet was still pretty nascent.
It was Sidhu, Ron Hochsprung, Larry Kenyon, and Alan Oppenheimer
http://www.patentstorm.us/patents/4689786-fulltext.html
Ron came up with the low-level stuff. He also did the PC Appletalk
card and firmware (and tons of other stuff since then).
Ron also did AppleNet for Lisa.