M214 Data Storage Register

This document describes the M214 module, which serves as a 6-bit adder and 6-bit storage register with input gating logic. When three of these modules are used together, they form an 18-bit Data Storage Register (DSR) for the PDP-15 I/O processor, facilitating data exchange between memory and I/O devices. The document provides technical specifications for the module, including a list of input pin connections and their associated TTL loads, output load capacities, timing requirements for strobing, and maximum power dissipation (5V at 280 mA).