DV11 Communications Multiplexer

This document is a user's manual for the DV11 communications multiplexer, which connects up to 16 serial data lines to the PDP-11 Unibus for bidirectional data transfer. It provides comprehensive details on the device's functionality, installation procedures, and programming information, including details on registers, control bytes, and protocol implementation for BISYNC and DDCMP communication. It includes diagrams of the hardware, address assignment instructions, and technical specifications.