Works even better. I will let you know if I get it compiled. Thanks Rob! ________________________________ From: robert.jarratt at ntlworld.com To: tpresence at hotmail.com; phiber at phiber.com; blairrya at cse.msu.edu CC: vaxorcist at googlemail.com Subject: RE: [HECnet] Hecnet and DDCMP Date: Sun, 8 Jan 2012 21:24:16 +0000 No I have not done that. I can send you the sources though, so I have attached them. The main files are vax_dmc.h and vax_dmc.c, but they need to be linked into the main emulator. I don t have time to go looking right now so I am sending you the whole source. Regards Rob From: Kevin Reynolds [mailto:tpresence at hotmail.com] Sent: 08 January 2012 18:24 To: r.jarratt at computer.org; phiber at phiber.com; blairrya at cse.msu.edu Cc: vaxorcist at googlemail.com Subject: RE: [HECnet] Hecnet and DDCMP Rob, Do you have a diff or patch file for the changes you made in the code? I use linux and macosx for my simh hosts, and want to fold it in (if its possible). Reading the docs, it looks like it should be good, as long as there aren't missing headers/structures. Kevin ________________________________ From: robert.jarratt at ntlworld.com To: phiber at phiber.com; tpresence at hotmail.com; blairrya at cse.msu.edu CC: vaxorcist at googlemail.com Subject: RE: [HECnet] Hecnet and DDCMP Date: Fri, 6 Jan 2012 17:18:13 +0000 I am happy to share the code with those who expressed an interest in it, it is still not perfect so we don t want to share it too widely yet, but clearly I am interested in any feedback you may have. Note that, as I said before, it has only been tested with VMS 5.4 and 4.6 on the VAX 780 emulation. I have never tried it with the PDP11 emulation. Also, the code has only been tested extensively on Windows, it has been compiled on Linux but only received very light testing. I only have a recent Windows build which I have attached along with a document explaining how to use it. Please note that work commitments mean that I will have limited time to support you over the next month, but I will try my best if you run into problems. Regards Rob From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Kevin Reynolds Sent: 06 January 2012 04:16 To: hecnet at update.uu.se Subject: RE: [HECnet] Hecnet and DDCMP I have RSTS/E but its v7. Kevin > Date: Thu, 5 Jan 2012 22:29:01 -0500 > Subject: Re: [HECnet] Hecnet and DDCMP > From: phiber at phiber.com > To: hecnet at update.uu.se > > Assuming Rob makes his patch to SIMH available, is there anyone on > HECnet willing to test peering with my RSTS/E setup? > > On Wed, Jan 4, 2012 at 5:45 PM, Rob Jarratt <robert.jarratt at ntlworld.com> > wrote: > > Yes, you are right, I do add a 2-byte length to the start of each buffer > > that I send so that the other end can reassemble the buffer. Sorry, I > > did > > say this in an earlier draft of the email, but decided to leave it out > > to > > emphasise the simplicity of the implementation. > > > > Regards > > > > Rob > > > >> -----Original Message----- > >> From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] > >> On Behalf Of Paul_Koning at Dell.com > >> Sent: 04 January 2012 22:15 > >> To: hecnet at Update.UU.SE > >> Subject: RE: [HECnet] Hecnet and DDCMP > >> > >> I assume there has to be a bit more to it, because DDCMP is a packet > >> based > >> protocol (not a stream protocol as TCP is) and the higher layers rely > >> on > > that. > >> So there presumably is some form of framing in the emulated data stream > >> to > >> indicate where the packet boundaries are. > >> > >> paul > >> > >> -----Original Message----- > >> From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] > >> On Behalf Of Rob Jarratt > >> Sent: Wednesday, January 04, 2012 5:11 PM > >> To: hecnet at Update.UU.SE > >> Subject: RE: [HECnet] Hecnet and DDCMP > >> > >> All I do in SIMH is to take the data bytes each end wants to send to > >> the > > other > >> end and send them over a socket, so I don't get involved with DDCMP > > itself. > >> Both ends have to be SIMH for this to work. I don't do anything at the > > actual > >> hardware level, although that would be nice. I think you can get > > synchronous > >> serial cards for the PC but they are quite expensive. > >> > >> Regards > >> > >> Rob > >> > >> > -----Original Message----- > >> > From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] > >> > On Behalf Of Paul_Koning at Dell.com > >> > Sent: 03 January 2012 21:18 > >> > To: hecnet at Update.UU.SE > >> > Subject: RE: [HECnet] Hecnet and DDCMP > >> > > >> > DMC-11 speaks DDCMP V3.1 (give or take some bugs in the "high speed" > >> > version). But that's sync only. Depending on what you want to talk > >> > to, a > >> DMC > >> > (or its relatives DMR-11, DMP-11, or DMV-11) may not help; if the > >> > other > >> end > >> > speaks DDCMP over an async link (UART) then it won't work because the > >> > character framing doesn't match. > >> > > >> > That said, I wonder what it means to emulate a DMC-11. You could > >> > have > >> > it speak DDCMP over a UART, or something else entirely. If the > >> > former > >> > it > >> would > >> > talk to another DDCMP node; if the latter it would not but it would > >> > still > >> work > >> > for tying one emulated DMC-11 to another. > >> > > >> > If you want DDCMP, one approach is to get a copy of the spec, and > >> implement > >> > what it says. That works; it is how I implemented DDCMP support for > >> > RSTS > >> V10 > >> > (based on an earlier version based on V9.6). The protocol is quite > >> > simple > >> and > >> > the spec is well enough written that, if you do what it says, the > >> > result > >> WILL > >> > interoperate with hardware such as the DMR-11. The only tricky one > >> > is > >> > the > >> > DMC-11 because it has some undocumented bugs; the main one I > >> remember > >> > is that the high speed version can't handle back to back packets. I > >> > wish > >> I could > >> > contribute the code I wrote but I can't, for various reasons one of > >> > them > >> is that > >> > it's a RSTS device driver and written in 100% assembly language. > >> > > >> > It would not be hard to do a version for other platforms; I once > >> > looked at > >> a > >> > Linux terminal protocol handler (forgot what that is called) that > >> > could > >> hook > >> > into DECnet/Linux. Didn't get far enough on that, though. > >> > > >> > paul > >> > > >> > -----Original Message----- > >> > From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] > >> > On Behalf Of Mark Abene > >> > Sent: Sunday, January 01, 2012 6:06 PM > >> > To: hecnet at update.uu.se > >> > Subject: Re: [HECnet] Hecnet and DDCMP > >> > > >> > Jarratt, did you make this publicly available on the SIMH list? It > >> > would > >> be great > >> > to have a DMC11 device emulated, since I insist on running RSTS/E v8 > >> > (for historical reasons... it was the last real RSTS before "the > > pollution"). > >> RSTS/E v8 > >> > doesn't have ethernet support, so the only way I could have DECnet is > >> > via > >> a > >> > (previously unemulated) > >> > DMC11 interface. Does yours work well? > >> > > >> > -Mark > >> > > >> > On Sun, Jan 1, 2012 at 3:23 AM, Jarratt RMA > >> > <robert.jarratt at ntlworld.com> > >> > wrote: > >> > > Working with a friend, I have written a SIMH emulation of the DMC11 > >> > > device, so you can do this with SIMH. It tunnels the bytes sent > >> > > to/from the device over a socket. We have used the SIMH emulation > >> > > to > >> > > connect my friend to HECnet over a (simulated) DMC11. > >> > > > >> > > The bit I am not entirely sure about is to what extent this is > >> > > using > >> > > DDCMP as I don't have a full understanding of DDCMP. > >> > > > >> > > Regards > >> > > > >> > > Rob > >> > > On 31 December 2011 18:46, The Presence <tpresence at hotmail.com> > >> > wrote: > >> > >> > >> > >> Hey guys, > >> > >> > >> > >> Has anyone worked out a mechanism to connect a node to hecnet > >> > >> using > >> > DDCMP? > >> > >> Perhaps some tunneling technology over IP, or virtualized serial? > >> > >> > >> > >> Kevin > >> > > > >> > > > >