> On Mar 12, 2016, at 11:20 AM, Bob Supnik <[email protected]> wrote:
>
> ...
> A number of systems of the early 70s (including the CDC 6600 and the XDS
> Sigma) had one-off interfaces to ARPAnet, using specialized IMPs, but the
> implementations are lost.
CDC 60-bit mainframes also had a variety of communications front ends. One is
the 2660, which provided terminal interfacing as well as some other stuff (X.25
I think). There's a partial emulation for that in the emulator DtCyber. The
other is the CDCNET front end processor, which is a lot more complex and not
emulated anywhere as far as I know. That one implemented TCP/IP including
Ethernet, as well as OSI networking protocols. I wonder if it would be
feasible to create a CDCNET emulation. That certainly would not be easy; it's
yet another full computer, pretty much.
paul
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