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From: "Ron Natalie" <>
Subject: Re: [TUHS] Unix NCP protocol stack for ARPANET
Date: Sun, 24 Oct 2021 18:32:00 +0000	[thread overview]
Message-ID: <em8d652e31-7445-4d63-a1bc-2ca236bbcc79@alien> (raw)
In-Reply-To: <>

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There were definitely as many PDP-11's (most running UNIX) as there were 
DEC 10s in the glory days of the Arpanet.   VAXes only rolled out toward 
the end of the NCP era.

However, the last NCP host table shows this statistic for DEC machines 
on the NCP Arpanet

VAX (UNIX):  58
VAX (VMS):  19

PDP11 (UNIX):  59
PDP11 (RSX): 6
PDP11 (MOS):  11
PDP11 (MINITS); 10

PDP10 (TOPS-20):  40
PDP10 (TOPS-10): 7
PDP10 (TENEX):   22
PDP10 (ITS):  4
PDP10 (WAITS): 3

I had all but forgotten about Local Host / Distant Host / Very Distant 
Host 1822 protocols.    I remember that BRL had a PDP-11/40 running ANTS 
(ArpaNet Terminal Server out of University of Illinois).   It got 
replaced by an 11/34 running UNIX when the Arpanet went to long leaders 
New Years 1981.

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  reply	other threads:[~2021-10-24 18:41 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-24 16:16 Lars Brinkhoff
2021-10-24 17:24 ` Clem Cole
2021-10-24 18:32   ` Ron Natalie [this message]
2021-10-24 19:28     ` Clem Cole
2021-10-24 19:28     ` Warner Losh
2021-10-24 20:25       ` Clem Cole
2021-10-25  9:26   ` Lars Brinkhoff
2021-10-25 16:50 Paul Ruizendaal
2021-10-25 19:04 ` Lars Brinkhoff
2021-10-25 18:50 Noel Chiappa
2021-10-28  9:41 ` Lars Brinkhoff
2021-10-26  8:06 Paul Ruizendaal

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