> On Mar 11, 2026, at 7:08 AM, Hans-Ulrich Hölscher <[email protected]> > wrote: > > You've probably noticed that I'm not very familiar with RT-11; my operating > system "home" is VMS. > I've got three more questions, two for SIMH (but related to DECnet-RT) and > one for RT-11 / DECnet-RT. > > - I am familiar with connecting two SIMH VAX instances for asynchronous > serial DDCMP, which looks like: > > VAX A: > > SET DZ ENABLE > SET DZ LINES=4 > ATT DZ LINE=0,44012,CONNECT=127.0.0.1:44021 <http://127.0.0.1:44021/> > > VAX B: > > SET DZ ENABLE > SET DZ LINES=4 > ATT DZ LINE=0,44021,CONNECT=127.0.0.1:44012 <http://127.0.0.1:44012/> > > The first question is how to configure a SIMH PDP-11 running DECnet-RT and a > SIMH VAX running DECnet-VAX over asynchronous serial DDCMP. >
You should be able to to set it up similar to your VAXes, just use DLI/DLO as the devices for DECnet-RT as I described in my notes. Make sure both ends have the same “;notelnet” setting. > The second question is how to configure two SIMH PDP-11s running DECnet-RT > over asynchronous serial DDCMP. > Same as above except both ends will use DLI/DLO. > The third question is can I start e.g. FAL and continue interactive work, > e.g. using RVT? > No. As I said the images we have are for an unmapped system so once you’ve loaded FAL there’s very little memory left (probably < 1KB). If we could find a full kit it would probably at least 124KW and probably allow multiple jobs, but that’s just a guess! > I hope I'm not being too pushy - Thanks a lot for your valuable continuous > help! > No problem,. I’m glad the notes were useful. John. > Ulli. > > Am Mi., 11. März 2026 um 07:52 Uhr schrieb johnforecast--- via cctalk > <[email protected] <mailto:[email protected]>>: >> >> > On Mar 10, 2026, at 3:11 PM, Paul Koning via cctalk <[email protected] >> > <mailto:[email protected]>> wrote: >> > >> > >> > >> >> On Mar 9, 2026, at 11:18 AM, johnforecast--- via cctalk >> >> <[email protected] <mailto:[email protected]>> wrote: >> >> >> >> I have been able to bring up the DECnet-RT images, that Jay posted a few >> >> weeks ago, on OpenSIMH. Below are my notes on how to get it running. >> >> ... >> >> The following programs are available: >> >> >> >> NCP - Network Control Program >> >> NFT - Network File Transfer >> >> TLK - Interactive talk with another (remote) terminal >> >> RMT - Remote terminal (RSX) >> >> RVT - Remote terminal (VMS) >> >> CED - Dumps internal DECnet data structures (/AL dumps >> >> everything) >> >> >> >> The following servers are available: >> >> >> >> NML - Network Management Listener (use with NCP) >> >> FAL - File Access Listener (use with NFT) >> >> LOOPER - Loop testing (use with NCP LOOP NODE name) >> > >> > So there is TLK but not the matching server (LSN)? It should talk to >> > RSTS, I assume. And PyDECnet has a LSN also. >> > >> > paul >> > >> >> According to the object definitions, it looks like TLK is both client and >> server. >> >> John. >>
