PDP-11/45 MS11 Semiconductor Memory Systems

This manual provides comprehensive maintenance, calibration, and logic description for the MS11 semiconductor memory systems utilized in PDP-11/45 computers. It covers both bipolar (M8111) and metal-oxide semiconductor (G401) memory modules, detailing their operation under the M8110 memory control module. The manual is organized into four main chapters:

• Chapter 1: System structure, specifications, and configurations.
• Chapter 2: Memory interface operations, including Unibus and Fastbus interactions.
• Chapter 3: Detailed logic descriptions for modules and controllers, including diagnostic parity and refresh logic.
• Chapter 4: Calibration and maintenance procedures, including pre-calibration steps, adjustment details, and diagnostic information.

Additionally, the document includes appendices covering MOSFET theory and integrated circuit descriptions.