M776 Reader Register

This document provides the technical overview for the M776 module, which includes two 6-bit buffer registers, output gates, and control logic. The M776 is designed to serve as an interface within the PC15 Reader Control to connect the PC05 Paper Tape Reader to the PDP-15 computer. It supports both 8-bit and 18-bit data transfers, with the module automatically assembling three characters for 18-bit word transfers. The document also lists the electrical characteristics, specifying that inputs and outputs use standard TTL levels and the module requires 5V at 470 mA.