[TUHS] 516-TSS Documents

Noel Chiappa jnc at mercury.lcs.mit.edu
Mon Nov 23 23:42:34 AEST 2020

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


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