The Unix Heritage Society mailing list
 help / color / mirror / Atom feed
From: jnc@mercury.lcs.mit.edu (Noel Chiappa)
To: tuhs@tuhs.org
Cc: jnc@mercury.lcs.mit.edu
Subject: Re: [TUHS] 516-TSS Documents
Date: Mon, 23 Nov 2020 08:42:34 -0500 (EST)	[thread overview]
Message-ID: <20201123134234.8F52218C096@mercury.lcs.mit.edu> (raw)

    > On Mon, Nov 23, 2020 at 12:28 PM Erik E. Fair <fair-tuhs@netbsd.org> wrote:

    > The Honeywell DDP-516 was the computer (running specialized software
    > written by Bolt, Bernanek & Newman (BBN)) which was the initial model of
    > the ARPANET Interface Message Processors (IMP).

The IMPs had a lot of custom interface hardware; sui generis serial
interlocked host interfaces (so-called 1822), and also the high-speed modem
interfaces. I think there was also a watchdog time, IIRC (this is all from
memory, but the ARPANET papers from JCC cover it all).

       Noel

             reply	other threads:[~2020-11-23 14:00 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-23 13:42 Noel Chiappa [this message]
  -- strict thread matches above, loose matches on Subject: below --
2020-11-23  0:16 Jon Steinhart
2020-11-23  2:18 ` Erik E. Fair
2020-11-23  3:10   ` George Michaelson
2020-11-23  4:00 ` Dennis Boone
2020-11-23  6:41   ` Jon Steinhart
2020-11-19  1:29 [TUHS] 516-TSS documents Jon Steinhart
2020-11-19  3:06 ` Grant Taylor via TUHS
2020-11-19  4:54 ` Jason T
2020-11-27  2:02 ` wkt
2020-11-27  2:13   ` clemc

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201123134234.8F52218C096@mercury.lcs.mit.edu \
    --to=jnc@mercury.lcs.mit.edu \
    --cc=tuhs@tuhs.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).