[comp.sys.ibm.pc.misc] Packet format for 3Com Ethernet

aj3u@ash.cs.virginia.edu (Asim Jalis) (06/21/91)

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.