Re: [TUHS] 516-TSS Documents - TUHS

23 Nov 2020

...
  On Mon, Nov 23, 2020 at 12:28 PM Erik E. Fair
&lt;fair-tuhs(a)netbsd.org&gt; 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