-----Original Message----- From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Dave McGuire Sent: Sunday, July 01, 2012 19:09 To: hecnet at Update.UU.SE Subject: Re: [HECnet] This is probably been asked already but.... 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. DECnet/RT was phase III only. The RT-11 group acquired the sources from the DECnet group to update it. Unfortunately, the project was cancelled due to funding issues. Funding went to support the ports to the Pro-series, and BASIC-PLUS to RT-11 from RSTS/E. I started in the RT-11 group (c 1983) just as they acquired it. I was hoping to start on the project but that was not to be... The "kit" was available on magtape and RX50's. It was huge! It really needed to be reworked to make use of the extended memory environment, but that was never to be. And you have IAS, as well as (probably) RSX-11D. IAS-11 was based on RSX-11D. It had three environments: multi-user/multitasking like RSX, real-time like RSX (actually more like VMS in some ways too), and a timesharing scheduler. IAS implemented the original version of DCL! It did look in some ways like VMS (because of DCL and the three environments), but was more RSX like than anything else. I worked in Software Services, in Maynard. My job was to support RSX (all flavors), IAS, VMS, RT, and a number of layered products. The largest customers for IAS were the various three-letter groups within the US government. I supported two of them. We will leave the names for a different time... :-) 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