[ih] NCP and TCP implementations

Bob Hinden bob.hinden at gmail.com
Tue Jul 21 11:49:41 PDT 2020

Never mind, I see I answered this earlier :-(


> On Jul 21, 2020, at 11:48 AM, Bob Hinden <bob.hinden at gmail.com> wrote:
> I did an NCP implementation for the BBN Pluribus (Lockheed SUE processor, I think) in assembly language, and a TCP in the Honeywell 316 assembly language.   That was a long time ago :-)
> Bob
>> On Jul 21, 2020, at 2:15 AM, Craig Milo Rogers 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.
>>> The Stanford first TCP implementation was done in BCPL by Richard Karp.
>>> Another version was written for PDP-11/23 by Jim Mathis but not clear in
>>> what language. Tenex was probably done in C at BBN. Was 360 done in PL/1??
>>> Dave Clark did one for IBM PC (assembly language/??)
>>> Other recollections much appreciated.
>> 	The UCLA Center for Computer-based Behavioral Studies (UCLA/CCBS) had
>> a PDP-10 (KA-10 running the TOPS-10 operating system) with a PDP-15 as an I/O
>> frontend, connected by shared memory.  The PDP-15 ran an in-house operating
>> system.  The NCP, part of that operating system, was written in PDP-15
>> assembly language, which was cross-assembled on the PDP-10.  TOPS-10
>> extensions, written in the PDP-10 assembly language, Macro-10, communicated
>> with the NCP on the PDP-15 to expose the PDP-10 as an Arpanet host; the PDP-15
>> was not itself listed as the host.
>> 	At least, that's what I remember.  It's been a while.
>> 					Craig Milo Rogers
>> --
>> Internet-history mailing list
>> Internet-history at elists.isoc.org
>> https://elists.isoc.org/mailman/listinfo/internet-history

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