On 07/01/2012 07:03 PM, Johnny Billquist wrote: Let's start with just the operating systems. I'm thinking of trying to get something running via SIMH soon, but I can't promise anything specific. That really opens it up. ;) Simh emulates several platforms for which there are DECnet implementations: PDP-8: there's a DECnet implementation for OS/8. PDP-10: TOPS-10, TOPS-20 PDP-11: RSTS/E, RSX-11/M/M+ VAX: VMS, Ultrix The PDP-8 DECnet is actually for RTS-8, and not OS/8. However, it's also only PHASE II, so I think we could rule that one out. Oops! My mistake, thank you for the correction. I thought it was for OS/8. I consider myself to be a PDP-8 aficionado, but I've never seen the DECnet implementation For PDP-11, I think that there was also some kind of DECnet for RT-11. And you have IAS, as well as (probably) RSX-11D. I don't think there was a DECnet for RT-11, but I could be wrong. Isn't IAS basically a chopped-down RSX? Also, I wonder if VAXELN also had DECnet? I'd imagine so, but I'm not certain. I'd guess yes because the firmware for some of DEC's X terminals is based on VAXELN, and early X implementations supported X over DECnet. And isn't there some sort of Alpha in simh as well nowadays? Barely, but yes. It's not really far along enough to be useful yet. -Dave -- Dave McGuire, AK4HZ New Kensington, PA