KN210 CPU Module Set System Maintenance

This document, titled "KN210 CPU Module Set System Maintenance" (Order Number EK-329AB-MG-002), is a comprehensive guide published by Digital Equipment Corporation in 1989. It is intended for Digital Customer Services personnel and qualified self-maintenance customers.

The manual provides detailed information on the KN210 CPU Module Set, covering its core components, configuration, firmware, and extensive troubleshooting procedures:

• KN210 CPU and Memory Subsystem: Describes the KN210 CPU module (featuring R3000 RISC and CVAX diagnostic processors), the KN210 I/O module (with DSSI and Ethernet interfaces), and the MS650-BA memory module. It outlines key features such as cache memory, console serial line, time-of-year clock, and Q22-bus interface.
• System Configuration: Provides guidelines for module order in the backplane, general system configuration, and specific instructions for configuring DSSI (Digital Storage System Interconnect) devices, including changing node names and unit numbers, and cabling.
• KN210 Firmware: Details the functions of the R3000 and CVAX firmware, including power-up sequences, ULTRIX-32 and MDM (MicroVAX Diagnostic Monitor) bootstrapping, and a full command reference for both normal mode (R3000 console commands like boot, dump, examine, setenv) and maintenance mode (CVAX console commands like BOOT, CONFIGURE, DEPOSIT, EXAMINE, TEST).
• Troubleshooting and Diagnostics: Offers general procedures for system diagnosis, outlines KN210 CVAX ROM-based diagnostics (including diagnostic tests, scripts, console displays, and error messages), acceptance testing steps, and specific troubleshooting suggestions for memory failures, DSSI, Ethernet, and console port issues using loopback tests and various diagnostic utilities (e.g., DRVTST, DRVEXR, HISTRY, PARAMS).
• Appendices: Include summaries of ULTRIX-32 Exerciser and Uerf commands for error logging, detailed KN210 address assignments, instructions for configuring the KFQSA storage adapter, and a list of Field Replaceable Units (FRUs) and related documentation.

In essence, the document serves as a complete technical and operational manual for maintaining systems built around the KN210 CPU Module Set, with a strong emphasis on command-line diagnostics and hardware-level troubleshooting.