Adecvax.158 net.unix-wizards utzoo!decvax!aps Wed Feb 10 02:49:45 1982 DDCMP communication to an RT-11 system DDCMP is the protocol established by the firmware of the DMC-11 and the DMP-11's You could install a DMC-11 (preferably a DMR-11) on your VAX and PDP-11 and connect them together. Now what is needed is stuff to talk to the DMC/DMR from the UNIX side. The RT-11 has a DMC/DMR driver, I think (RT-11 has changed so much since I used it!). After all this, you need the higher level protocol software to do anything meaningful. DECnet?? Armando.