23 Nov
2020
23 Nov
'20
1:42 p.m.
On Mon, Nov 23, 2020 at 12:28 PM Erik E. Fair
<fair-tuhs(a)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