MM11-D/DP Core Memory

This document describes the MM11-D/DP Magnetic Core Memory system, designed for use with the PDP-11 Unibus. The manual covers several key areas:

• General Description: Details on capacity (16K words), parity (18-bit for DP), and addressing features like memory interleaving.
• Physical Description: Information on the G652 motherboard and H722 hex stack components.
• Installation: Procedures for setting starting addresses, jumper configurations, and Unibus termination.
• Logic Description: A comprehensive breakdown of the core array, address decoding, read/write control logic, current sources, and drivers.
• Maintenance: Preventive maintenance steps (visual inspection, voltage checks), corrective troubleshooting, and a chart for system diagnostics.
• Appendices: Detailed descriptions of integrated circuits (ICs) used within the system.