VAX 8820/8830/8840 System Hardware User's Guide

This document is the VAX 8820/8830/8840 System Hardware User's Guide.

It provides comprehensive information on these LSI-based, high-performance, 32-bit VAX systems, which support symmetric multiprocessing (SMP) with 2, 3, or 4 CPUs and utilize the VAX/VMS Operating System.

The guide details:

• System Overview and Physical Description: Outlining the system's modular components housed in a MicroVAX II console enclosure, a CPU cabinet, and a memory cabinet, with options for VAXBI expansion.
• System Operation: Covering procedures for system setup, applying and removing power (including power-on/off, initialization, booting, powerfail, and warm restart sequences), console interaction (commands, prompts), and managing console log files. It also introduces the STAR process for system monitoring.
• Functional Description: Providing an in-depth look at the system's architecture, including the console subsystem (with the MicroVAX II as its core), the Central Processing Unit (CPU), Clock Module, Memory (MBox), and key system buses such as the Memory Interconnect (NMI), VAXBI Interconnect (I/O bus), and Visibility Bus (VBus). It also describes the power system components.
• System Maintenance: Offering guidance on preventative maintenance (e.g., cleaning filters), console subsystem hardware self-tests, troubleshooting simple problems with a quick-reference table, and detailed procedures for setting up a remote diagnostic session, including information on the DF112 modem.

The document serves as a primary resource for operating and basic maintenance of the VAX 8820/8830/8840 hardware.