KD11-K Microdiagnostic

This document provides a comprehensive user guide for the KD11-K Microdiagnostic (DCS) module (M7871). The DCS module functions as an alternate control store, enabling microcoded tests to detect and isolate errors within the internals of the PDP-11/60 processor control and datapath hardware.

Key sections include: - Requirements & Loading: Lists the necessary hardware (M7871 module, PDP-11/60, etc.) and the installation procedure. - Starting & Operating: Details two methods for initiating DCS execution (via Operator's Console or DCS switches) and how to interpret console and LED indicators during execution. - Restrictions: Covers limitations regarding Cache/Memory Management and MOS battery backup. - Test Description: Explains the testing philosophy (minimal hardcore, incremental testing) and provides a global test order summary of the major functional blocks tested. - Error Handling: Defines the role of the FAULT DIRECTORY and the usage of the 'SCOPE Loop' facility. - Verification Mode: Details the self-check mode used to verify DCS operation.