PDP-11/45 MS11 Semiconductor Memory Systems

This document provides comprehensive technical information for maintaining the MS11 semiconductor memory system on PDP-11/45 computers. It covers the two types of memory modules supported: bipolar (M8111) and MOS (G401), both managed by the M8110 Memory Control Module. The manual includes a system description, detailed interface operation procedures for the Unibus and Fastbus, an in-depth analysis of the control and matrix module logic, and step-by-step calibration and maintenance instructions. Appendices provide technical details on MOSFET operation in random-access memories and descriptions of integrated circuits used within the modules.