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From: jac@UMD5.UMD.EDU.UUCP
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: Re: 3COM 3c503 (Etherlink II) -- info needed.
Message-ID: <8711190246.AA23866@umd5.UMD.EDU>
Date: Wed, 18-Nov-87 21:46:23 EST
Article-I.D.: umd5.8711190246.AA23866
Posted: Wed Nov 18 21:46:23 1987
Date-Received: Sat, 21-Nov-87 15:40:53 EST
References: <8711181939.aa23456@Louie.UDEL.EDU>
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3Com's vector interface is to be published soon.  The "vectorized" version
of their 3+ system is not expected until end 1Q '88.  One would have to wait
until then to co-reside with 3+.

Until that time, 3Com does have a subset spec called 3L.  One can write to
this specification in order to support the 3c503, 3c523 and TokenLink cards.
This specification and the 3L libraries for the above mentioned cards are
currently available (3c523 library may be available shortly).

On the original question (programming the 3c503) the following may be
of interest:

	The board uses the National Semiconductor DP839x chipset, see
	the "Advanced Peripherals, IEEE 802.3, Local Area Network Guide"
	by National.

	Interface to the PC bus is through a 3Com gate array, see them
	for programming info.

/joe
------------------------------
Joseph A. Cimmino, Jr.    University of Maryland, Systems    jac@umd5.umd.edu
1+ 301 454 2946                   PC/IP Group              cimminoj@umdd.bitnet

Bertolt Brecht:  You made your bed, so you lie in it.