[ih] NCP and TCP implementations

[Steve Crocker]

Craig,

Do you have dates for the CCBS system?  Also, where was the machine, ie
which building, and how was it connected to the IMP?

Thanks,

Steve

On Tue, Jul 21, 2020 at 5:15 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
>
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