Major Register Cont.

This document is a technical schematic set for the Digital Equipment Corporation (DEC) "Major Register Cont." (M8310) module, likely used in a PDP-8/E computer system. The documentation consists of four pages:

• Page 1: Provides an assembly diagram of the M8310 board, showing the physical layout of integrated circuits (ICs), resistors, and connectors. It includes a parts list detailing various 7400-series TTL logic chips and discrete components.
• Pages 2, 3, and 4: Contain detailed logic circuit diagrams. These pages map out the complex interconnection of logic gates, flip-flops, and buffers that control the system's major registers.
• Key Technical Data: Page 3 includes logic tables defining the operational modes for data manipulation, register addressing, and arithmetic functions (such as increments and shifts). It also features a "Signals to Back Connectors" pinout guide, which is essential for troubleshooting or integrating the board into the computer's backplane.

Overall, this is a hardware engineering reference used for maintenance, assembly, or design analysis of the M8310 module.