[TUHS] Attempting To Build NOSC and BBN UNIXs + ARPANET code
lars at nocrew.org
Tue Oct 11 15:31:23 AEST 2022
TUHS Disclaimer: I will claim this is primarily about getting Unix onto
the Arpanet, but it does also contain trace amounts of off-topic
information. Reader discretion is adviced.
Michael Casadevall wrote:
> I do need to do a readthrough for the VDH driver, which says its for
> "very distant hosts". I think that might be for the radio links
The hardware interfaces between a host and an IMP came in three flavors:
local host, distant host, and very distant host. The first two are more
or less directly connected and I forget what the difference is. But a
very distant host is basically connected over a phone line with a modem
at each end, so it's a different beast. The VHD driver would be for
this, whilst IMP11A and ACC are local or distant.
Side note: apparently tapes from the unique Hawaii BCC 500 have been
saved. So maybe that's one more possible re-Arpanet host.
> Yup, that's what I figured. I've been trying to evaluate how much
Here's my take:
So there are like four PDP-10 systems and two PDP-11. The ELF system
will be a major challenge, RATS haven't been scanned off the printer
listing, and the BCC 500... oh boy, let's not go there now.
> I don't know if a runnable build of TENEX has been archived,
I think so. I "almost" got one running but there was some problem...
> or if ARPA stuff for TOPS-10/20 survived.
TOPS-20AN seems to be there. TOPS-10, nothing so far.
> I also want to look into System/360 and 370, but I get the sense none
> of the mainframe stuff survived.
I asked around; found nothing. CDC, same.
> The other problem is of the surviving stacks, they all seem to be for
> the later 96-bit leader, I'm not certain if any of the IMP software
> that has been archived is new enough to work with that.
Nothing for the 316/516 IMP, as far as I know. Pluribus IMP emulator,
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