Drawing Directory

This document serves as a drawing directory for a Digital Equipment Corporation (DEC) memory print set. It provides an index of the various electrical and mechanical components required for the 4K and 8K, 12-bit memory units (MMS-E and MMS-EJ).

Key contents include:

• Customer Print Set Index: A comprehensive list of component parts, including block diagrams, X-Y drivers, stack boards, sense inhibits, and memory assemblies.
• Unit Variations: A table summarizing the differences between the 12-bit memory configurations (4K vs. 8K).
• Manufacturing and Test Info: A list of manufacturing procedures, test procedures, and purchase specifications associated with these memory sets.
• Technical Schematics: The document includes detailed schematic diagrams for the "X-Y Driver and Current Source" (G227), showing component-level layouts, resistor/capacitor values, and assembly instructions.
• Revision History: The index serves as a reference for document revisions (e.g., DRB 106, 107, and 108), detailing specific drawing numbers for components such as the H212 stack schematic and various interface boards.