MA and MB Registers

The M223 module is a 4-bit register component with input gating logic, designed for use in PDP-15 memory systems. Five of these modules are combined to form the 18-bit Memory Buffer (MB) register and the 13-bit Memory Address (MA) register for each memory bank. The document details the module's input pins and TTL unit loads, output drive capabilities for MB and MA configurations, and its maximum power dissipation (5V at 175 mA).