Memory Selector

This document is a technical schematic diagram for the Digital Equipment Corporation Memory Selector module, identified as G221. It includes:

• Detailed logic circuitry using DEC7400N and DEC7440N integrated circuits.
• A transistor and diode conversion chart mapping DEC-specific components to industry-standard parts (e.g., DEC1008 to MM1008).
• Power supply information, including pinouts for +5V and Ground.
• Reference to the parts list (A-PL-G221-0-1).

This schematic is intended for test and maintenance purposes.