-----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: 13 December 2012 19:03 To: hecnet at Update.UU.SE Subject: Re: [HECnet] VCF-East on HECnet? On Dec 13, 2012, at 1:58 PM, John Wilson wrote: From: "Rob Jarratt" <robert.jarratt at ntlworld.com> If you want to peer with me using DMC11 let me know. I will need to know your IP/DNS address and a port you want to listen on. You can download a Windows executable of the VAX780 emulation with DMC11 support here: http://sdrv.ms/Lmg33s I am hoping that the DMC11 will be in the next release of SIMH, and perhaps in the PDP11 emulation too. To configure your side you need the following commands: So, does the DMC11 emulation just send DDCMP messages in UDP datagrams, or is it more complicated than that? No. It uses a TCP connection. Each buffer received from the device driver is sent along on the TCP connection with a 2-byte length prefix, and that is it. So no DDCMP underneath. I've been meaning to add DMC/DMR emulation to Ersatz-11 for centuries, and obviously I'd want to make sure it interoperates with SIMH. (There are already undocumented ASSIGN/DEASSIGN/SET/SHOW XM: commands since ages ago, but the resulting device doesn't actually work.) Thanks, John Wilson D Bit If you want to really make your head spin, imagine DMP/DMV emulation (DDCMP multipoint). I am hoping to add this one day. Regards Rob