MicroVAX 3100 Platform KA47 CPU System Maintenance

This document is the MicroVAX 3100 Platform KA47 CPU System Maintenance manual, published in November 1991 by Digital Equipment Corporation.

Purpose & Audience: It provides comprehensive maintenance and troubleshooting information for systems utilizing the KA47 CPU module, intended for Digital Equipment Corporation's service personnel and customers with self-maintenance agreements.

Key Content Areas:

1. KA47 CPU Module Description: Details the module's components (e.g., DC595 processor chip, S-chip, memory, controllers), supported data types, instructions, and various memory configurations (MS44 and MS44L modules) with installation guidelines.
2. System Configuration: Covers basic and expanded memory configurations, internal and external mass storage devices (including recommended SCSI ID numbers), and asynchronous and synchronous communication options.
3. KA47 Firmware: Describes the functionality of the system's firmware, including:
   • Power-Up Test and Initialization: How the system starts and tests its components.
   • Console Program: Commands, modes (privileged/unprivileged), and security features for system interaction during halt states.
   • Self-Tests: Diagnostic tests for individual devices (e.g., Nonvolatile RAM, Serial Line Controller, Cache, Memory, Floating-Point Unit, Interval Timer, Network Interface, SCSI, Communication, Asynchronous Communication).
   • Utilities: Device-specific functions for tasks like erasing disk contents or formatting diskettes.
   • System Exerciser: Tests for simultaneous operation and interaction of multiple system devices.
4. Testing and Troubleshooting: Provides general troubleshooting information and detailed procedures for isolating faults related to various system components, utilizing the self-tests and system exerciser, often requiring specific test environments (Customer, Digital Services, Manufacturing) and loopback connectors.
   • Specific troubleshooting sections are dedicated to each tested component (NVR, DZ, CACHE, MEM, FPU, IT, SYS, NI, SCSI, COMM, ASYNC, and Power Supply).

Appendices include troubleshooting flowcharts, a memory map, Field Replaceable Unit (FRU) numbers for various devices, and details on jumper wires for the KA47 CPU module.