Device Code Select Jumper Board

This document is a technical schematic for the M921-0-1 Device Code Select Jumper Board, produced by Digital Equipment Corporation in 1969. It contains:

• Pin Signal Assignments: A detailed mapping of device signal paths (MB3 through MB8).
• Schematic Diagram: A circuit layout showing the jumper connections and component points.
• Design Information: Identification of split lugs and component board details for test and maintenance purposes.