RSX-11M PDP-11/70 Multiprocessing System Functional Specification

This document outlines the system functional specification for a tightly coupled (shared memory) multiprocessor system based on the PDP-11/70 processor and the RSX-11M operating system. The primary design goal is to enhance system availability and performance by providing redundant components and the ability to reconfigure around system failures. Key sections include:

• System Organization: Details the hardware and software topology, including multiprocessor synchronization.
• Hardware Components: Covers processor modifications, multiport memory (MK11), interprocessor interrupt and sanity timers (IIST), time-of-day (TOD) clocks, and mass storage interfaces.
• Software Components: Describes executive extensions for multiprocessing, diagnostic tools, error logging, and the bootstrap module.
• Reliability and Maintenance: Discusses metrics for availability and powered-up repairability.

Appendices provide supplementary information on availability analysis, the justification for tight coupling, and the rationale for selecting the RSX-11M and PDP-11/70.