On Apr 4, 2013, at 4:59 PM, Cory Smelosky wrote: On 04/04/2013 04:45 PM, hvlems wrote: No ethernet in '79, no phase IV. So a DU11? Hmmmm. Does SIMH emulate that? It doesn't look like it does. And I don't know that VMS ever supported that device, anyway. RSX did, but various other systems tended to stay away from it because of the high software overhead. I do know that VMS supports DMC-11 (or DMR-11, essentially the same at the driver level), and there is support for that in the in-development release of SIMH. paul