[TUHS] Re: Attempting To Build NOSC and BBN UNIXs + ARPANET code

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: 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. Here's my take: https://gunkies.org/wiki/Network_Control_Program_(ARPANET)#Implementations 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 think so. I "almost" got one running but there was some problem... TOPS-20AN seems to be there. TOPS-10, nothing so far. I asked around; found nothing. CDC, same. Nothing for the 316/516 IMP, as far as I know. Pluribus IMP emulator, anyone?