[ih] NCP and TCP implementations

[Vint Cerf]

I sent a note to Adrian Stokes.

v


On Sat, Jul 25, 2020 at 6:41 AM Scott O. Bradner <sob at sobco.com> wrote:

> I think it was assembler if it is the version I used for a while
>
> Scott
>
>
> > On Jul 25, 2020, at 6:38 AM, Vint Cerf via Internet-history <
> internet-history at elists.isoc.org> wrote:
> >
> > Peter Kirstein's lab did an implementation for a PDP-9 but I don't recall
> > whether it was in a high level language or assembler. Adrian Stokes might
> > know.
> >
> > v
> >
> >
> > On Sat, Jul 25, 2020 at 5:00 AM Christian de Larrinaga via
> Internet-history
> > <internet-history at elists.isoc.org> wrote:
> >
> >> I didn't know about the BCPL coding for Tenex. I recall Prof Elliot at
> >> Cambridge asking if I'd come and work for his company which sold a BCPL
> >> compiler as I'd established BCPL with a number of developers who started
> >> using Alto and later SiriusB micros in around 1981/2.
> >>
> >> C
> >>
> >> On 24/07/2020 18:30, Dan Lynch via Internet-history wrote:
> >>> The original TCP for Tenex was written in BCPL in user space (rather
> >> than in the underlying system space) and once it was reasonably stable
> it
> >> was converted to Macro-10 so it could be folded into the system. I
> believe
> >> Bill Plummer (RIP) did all that work. I helped him in the debugging
> tasks
> >> while I was at SRI.
> >>>
> >>> Dan
> >>>
> >>> Cell 650-776-7313 <(650)%20776-7313> <(650)%20776-7313>
> >>>
> >>>> On Jul 21, 2020, at 6:43 PM, Noel Chiappa via Internet-history <
> >> internet-history at elists.isoc.org> 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.
> >> 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.
> >>>>
> >>>> 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
> >>>> --
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> >>>> https://elists.isoc.org/mailman/listinfo/internet-history
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> >>
> >
> >
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