DK8-EC Crystal Real Time Clock

This document contains the engineering drawings, parts list, and test procedures for the DK8-EC crystal real-time clock module (M8830) designed for the PDP-8/E processor. It provides detailed technical information, including:

• General Description: Explains the M8830 module, including selectable rates of 1 Hz, 50 Hz, 500 Hz, and 5000 Hz, and how it plugs into the PDP-8/E OMNIBUS.
• Operational Details: Provides logic, timing diagrams, block diagrams, and sample programs for operation.
• Specifications: Lists operating conditions (temperature, humidity, power) and frequency stability.
• Test Procedures: Outlines setup, system checkout, diagnostic procedures using the mother system, and heat testing protocols.
• Parts and Schematics: Includes a master drawing list, parts list, schematic diagrams, and pin locations for the M8830 module.