[ih] NCP and TCP implementations
the keyboard of geoff goodfellow
geoff at iconia.com
Tue Jul 21 23:05:26 PDT 2020
can anyone recall WHO and/or WHERE it was that had their NCP (don't think
it was TCP) implementation apparently running in "user space" as a job or
process (as opposed to as part of the OS/Kernel) and "complained" how much
it was co$ting them/their departments budget to be connected to the ARPANET?
logic would dictate this must have been some department/research
group/project that was dependent -- as paying "user" -- of a (university?)
central computer facility that billed them for the NCP "process", say, as
opposed to a group or lab that "owned"/had their own system...¿
On Tue, Jul 21, 2020 at 7:53 PM Michael Greenwald via Internet-history <
internet-history at elists.isoc.org> wrote:
> On 2020-07-21 18:43, Noel Chiappa via Internet-history wrote:
> >> On 20.03.10, vinton cerf via Internet-history wrote:
> > >
> > > Steve Kirsch asks in what languages NCP and TCP were written.
> > > ...
> > > Another version was written for PDP-11/23 by Jim Mathis but not
> > clear in
> > > what language.
> > I think I answered this when it was first posted, but I now have some
> > additional data (I think).
> > It was written in MACRO-11; PDP-11 assembler with a powerful macro
> > capability.
> > After some poking around in a copy of the file system of the v6 Unix
> > timesharing system of the CSR group at MIT, which has all sort of
> > goodies in
> > it (including a copy of the NCP for v6 Unix), I have recovered a copy
> > of that
> > TCP, if anyone wants it.
> > I'm not sure if it was done for the -11/23; we got MOS (Jim's OS, and
> > other
> > software, including the TCP and an early version of the Port Expander
> > codea)
> > early on, and I seem to recall that the -11/23 didn't come out until
> > after we
> > had MOS. I'd have to look up exactly when the KDF11 was released to be
> > sure, if
> > it's important. MOS had conditionals to work on the -11/03 and also the
> > -11/20
> > and -11/40 (binary for the -11/40 will run on the /23). I think the
> > TCP, etc
> > were written for the -11/03.
> > > Dave Clark did one for IBM PC (assembly language/??)
> > No, but Dave did I think at least two others; possibly one in BCPL? for
> > the
> > Tripos operating system from Cambridge, and definitely one in BCPL for
> > the
> > Alto (MIT got several as a donation from Xerox). Before the latter, he
> > also
> > worked on the Multics one (in PL/I) although someone else whose name my
> > failing brain can't remember at the moment worked on that before him.
> I think it may have been Charlie Hornig who you are thinking of? (he
> did early work on the Multics TCP implementation for Dave.)
> I did something of a rewrite, later. Those were user-ring versions.
> Lster, still, when it was passed to Honeywell, I moved it an inner ring
> (badly), and then was totally re-written, again, by J. Spenser Love.
> All those versions were written in PL/1.
> The user-ring versions of the Multics TCPs were definitely written
> before Dave wrote the Tripos BCPL versions.
> > The Alto
> > one was later translated into C by Larry Allen for the CSR v6 Unix,
> > which I
> > used as the base on one I did for Bridge.
> In 1982-84 we also had a TCP written in CLU for our Swift operating
> system, which ran on vaxes and 680x0, but it was never used by
> anyone outside of the group.
> > The one for the PC was done by John Romkey and David Bridgham, in C;
> > the CSR
> > machine dump has that one too, if anyone wants it.
> > Noel
> Internet-history mailing list
> Internet-history at elists.isoc.org
Geoff.Goodfellow at iconia.com
living as The Truth is True
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