Multi-CPU User's Guide

This user guide, published in December 1981 by Digital Equipment Corporation, provides a reference for operators, system administrators, and field service personnel on the Multi-CPU system.

The Multi-CPU system is defined as a multiple central processor unit (CPU) system, specifically composed of multiple KL10-D (1090) CPUs, MH10 core memory, various disk drives (RP04, RP06, RP07, RP20), and magnetic tape transports (e.g., TU45, TU70 series). Its primary purpose is to enhance system capacity and performance over single-processor configurations by enabling shared memory and I/O devices among multiple processors, all running a single copy of the TOPS-10 operating system, and capable of handling up to 300 active jobs.

The document covers:

• Product Description and Specifications: Details the system's components, electrical, mechanical, and environmental specifications, and lists related hardware and software documentation.
• System Considerations: Explains Multi-CPU configurations, provides block diagrams illustrating memory, disk, and tape drive setups, and describes how the TOPS-10 operating system functions in this environment, including features like multiprogramming, virtual memory, and network capabilities. It also outlines a stand-alone mode for maintenance.
• Installation: Guides users through site preparation requirements (e.g., building, power, safety), unpacking and initial checkout, deskidding procedures for the KL10-D CPUs, detailed cabling instructions (including cable length restrictions), power-up procedures (such as voltage and LED checks), and the final hardware acceptance test requirements.