As the designer and implementor of the Qbus and Unibus Ethernet handlers for RT, I can say that for the NU handler to work (with either DEUNA or DELUA), the version of RT you use must have the support for Unibus Map. If not, it won't work. I have to admit that I don't remember which version of RT was the first to release with Unibus Map support... (so many versions, they all sort of blur in memory over time...) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL,ST| email: mbg at world.std.com | | Member of Technical Staff | megan at savaje.com | | SavaJe Technologies, Inc. | (s/ at /@/) | | 100 Apollo Drive | URL: http://world.std.com/~mbg/ | | Chelmsford, MA 01824 | "pdp-11 programmer - some assembler | | (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+