Xref: utzoo comp.os.minix:17144 comp.sys.ibm.pc.hardware:10029 comp.sys.ibm.pc.misc:10615 comp.os.msdos.programmer:5761
Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!sample.eng.ohio-state.edu!purdue!haven.umd.edu!uvaarpa!murdoch!murdoch.acc.virginia.edu!aj3u
From: aj3u@ash.cs.virginia.edu (Asim Jalis)
Newsgroups: comp.os.minix,comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc,comp.os.msdos.programmer
Subject: Packet format for 3Com Ethernet
Message-ID: <AJ3U.91Jun20165937@ash.cs.virginia.edu>
Date: 20 Jun 91 21:59:37 GMT
Sender: usenet@murdoch.acc.Virginia.EDU
Organization: University of Virginia, Charlottesville, VA 22903
Lines: 29

I am looking for a precise description of the
format for the Ethernet packets, which for the
controller I am using is supposed to be Version
1.0.  I have very little documentation.  The goal
here is to write a network device driver for
Minix.

I can see what look like machine addresses in the
packets in octets number 26-29 (start counting at
0) and in octets number 30-33.

This does not match any of the packet formats I
see in the various textbooks in the library.

Here are the things I am looking for:
 o  which address is which.
 o  where does the data start.
 o  what are the octets before the addresses.
    There is no preamble (no regular 1s and 0s).
 o  what is a good source for the info I need.
    Any books or journals?  I would especially
    appreciate references to journals since
    our library has relatively complete
    collections.

Please respond by email, since I am posting this
to several newsgroups that I don't read regularly.

Asim Jalis.