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Re: Try again: IP between Pi <--> klh10 TOPS-20

From David Todd <hdtodd@gmail.com>
Newsgroups alt.sys.pdp10
Subject Re: Try again: IP between Pi <--> klh10 TOPS-20
Date 2026-01-02 17:36 -0500
Organization A noiseless patient Spider
Message-ID <c73a4477-52d7-4ced-8841-578803d3bcd7@gmail.com> (permalink)
References (3 earlier) <87fr8qfsmp.fsf@atr2.ath.cx> <36bf44a9-b22b-4529-8b69-c3b5598f6a04@gmail.com> <87ldih48o8.fsf@atr2.ath.cx> <0dda00e5-fe50-4065-b7a9-818abcc380cf@gmail.com> <87y0mfhow1.fsf@atr2.ath.cx>

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On 1/2/26 1:04 PM, jayjwa wrote:
> Since you do have two real interfaces to use, you could probably give
> the guest a dedicated eth0, and let wlan0 be your interface to the
> outside world. Your klt20.ini line would have to reflect that.

Yes, I've alternated between those two options, trying the other when I 
ran out of ideas for fixing the one I last worked on.  I'm not sure that 
was a good strategy.  :-)

I was trying to develop an installation guide for the Pi that kept it as 
simple as possible 
(https://github.com/hdtodd/DECSYSTEM-20-on-Raspberry-Pi). I'm amused at 
the idea that we can run a computer that (as I recall) cost $1M or so in 
1980 can run on a $35 Pi (though my Pi-5 cost $80 or so).  I wanted to 
make it easy for others to try.  Perpetuate Mark's quote (or Ralph's or 
Len's) that "TOPS-20 is a great improvement over its successors". ;-)

I've got a long note coming about my (failed again) attempt to get IP 
working over a shared interface, so I'm prepared to try the dedicated 
interface idea again.

And I think it might be simplest for new installers on the Pi to set up 
the Pi to use eth0 as a dedicated interface for the DEC20 and use wlan0 
for external connections.  If I have etho as 192.168.1.88 and wlan0 as 
.89; want DEC20 as .62; and don't want to set up br0/tap0, what might my 
klt20.ini devdef for NI0 look like?  I've tried it (obviously) but 
didn't get it right.

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Thread

Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2025-12-29 18:31 -0500
  Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2025-12-30 12:54 -0500
    Re: Try again: IP between Pi <--> klh10 TOPS-20 Rich Alderson <news@alderson.users.panix.com> - 2025-12-30 20:43 -0500
      Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2025-12-31 12:50 -0500
        Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-01 09:59 -0500
          Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-01 11:08 -0500
            Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-01 11:27 -0500
              Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-02 13:04 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-02 17:36 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-01-03 05:37 +0000
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-03 07:09 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-03 08:40 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-03 11:33 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-03 06:59 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 09:07 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 09:20 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 Johnny Billquist <bqt@softjar.se> - 2026-01-04 16:26 +0100
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 10:57 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-01-05 06:38 +0000
            Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-02 07:46 -0500
              Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-02 12:54 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-02 17:05 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 Rich Alderson <news@alderson.users.panix.com> - 2026-01-02 20:32 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-02 22:21 -0500
            Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-02 17:47 -0500
              Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-03 12:15 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-03 16:57 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-03 17:00 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-04 11:21 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-05 17:52 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-05 18:13 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-06 12:53 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-06 18:12 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <HDTodd@gmail.com> - 2026-01-06 18:15 -0500
                MM vs. MS/MX [was Re: Try again: IP between Pi <--> klh10 TOPS-20] Rich Alderson <news@alderson.users.panix.com> - 2026-01-07 18:28 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-03 17:07 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-04 11:28 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 13:52 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-03 18:12 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 scott@slp53.sl.home (Scott Lurndal) - 2026-01-04 00:00 +0000
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 08:48 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 scott@slp53.sl.home (Scott Lurndal) - 2026-01-04 16:00 +0000
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 14:02 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-04 11:56 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 14:21 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-01-04 16:16 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 16:58 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 14:28 -0500
                Re: Try again: IP between Pi <--> klh10 TOPS-20 scott@slp53.sl.home (Scott Lurndal) - 2026-01-05 15:33 +0000
                Re: Try again: IP between Pi <--> klh10 TOPS-20 Andy Valencia <vandys@vsta.org> - 2026-01-05 15:45 -0800
                Re: Try again: IP between Pi <--> klh10 TOPS-20 David Todd <hdtodd@gmail.com> - 2026-01-04 08:59 -0500

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