Newsgroups: comp.archives
Path: utzoo!utgpu!news-server.csri.toronto.edu!ox.com!emv
From: jbvb@FTP.COM ("James B. Van Bokkelen")
Subject: [pcip] Re: Recent Dev. of PC/IP
Message-ID: <1991Feb28.050855.22625@ox.com>
Followup-To: comp.protocols.tcp-ip.ibmpc
Sender: emv@ox.com (Edward Vielmetti)
Reply-To: jbvb@ftp.com
Organization: The Internet
References: <9102271624.AA13440@ftp.com>
Date: Thu, 28 Feb 1991 05:08:55 GMT
Approved: emv@ox.com (Edward Vielmetti)
X-Original-Newsgroups: comp.protocols.tcp-ip.ibmpc

Archive-name: internet/msdos/harvard-pcip/1991-02-27
Archive-directory: husc6.harvard.edu:/pub/pcip/ [128.103.1.56]
Original-posting-by: jbvb@FTP.COM ("James B. Van Bokkelen")
Original-subject: Re: Recent Dev. of PC/IP
Reposted-by: emv@ox.com (Edward Vielmetti)

Some random points:

PC-IP's multiple-connection TCP was written at MIT long ago, but never really
debugged until Dan Lanciani included it in the most recent Harvard version.
Unless it's changed a lot from what we began with, it is slow and lacks many
important features like adaptive retransmit.

The Packet Driver interface for PC-IP was done by Karl Auerbach while he was
doing consulting work for TRW.

Drew Perkins at CMU was responsible for the port to MSC 3.0.  I believe the
Harvard version is built with MSC 5.1.  PC-IPs have always been small-model
(the tasker and the ASM glue routines only understand that memory model).

Wollongong shipped various PC-IP derived products, first based on the MIT
version, later on the SU version.  Bridge also shipped SU-derived products,
but I don't think current DOS TCP/IPs from either TWG or 3Com have much of
any PC-IP heritage.  Sun's PC-NFS had a little PC-IP in it at one point.
IBM's TCP/IP for DOS was an earlier version of the UMD code, closer to its
CMU ancestry.  IBM has also followed a line of development based on an
early port of the MIT PC-IP to Xenix through to their current AIX TCP/IP.

James B. VanBokkelen		26 Princess St., Wakefield, MA  01880
FTP Software Inc.		voice: (617) 246-0900  fax: (617) 246-0901