Data Multiplexer

This document is the instruction manual for the Type DM01 Data Multiplexer, manufactured by Digital Equipment Corporation. It serves as a comprehensive guide for maintaining the device, which acts as a switching system connecting the PDP-8 computer to up to seven peripheral devices using the data break facility. The manual includes chapters on product operation, interface specifications, power supply details, maintenance procedures (both preventive and corrective), installation requirements, and a detailed list of schematics and parts, including semiconductor substitution tables.