Rainbow 100 Technical Manual

This document provides an in-depth technical manual for the Digital Equipment Corporation Rainbow 100 (model PC100A) computer. The manual is structured to assist field service engineers and technicians with the design, operation, and maintenance of the system.

Key contents include: * System Overview: Description of the dual-processor architecture (Z80A and 8088), memory configurations, and standard hardware components. * Operating Information: Procedures for diskette usage, system startup, and the use of the Set-Up mode for parameter configuration. * Technical Descriptions: Detailed functional and technical breakdowns of the system module, RX50 controller module, RX50 diskette drive, power supply, keyboard (LK201), and video monitor (VR201). * System Interface & Connectors: Detailed pin-out definitions for all system connectors, including communications, printer, and memory expansion interfaces. * Testing and Troubleshooting: Information on using built-in ROM-based and diskette-based diagnostic programs, as well as a troubleshooting guide for common hardware issues. * Service Information: Step-by-step procedures for the removal and replacement of field replaceable units (FRUs). * Character Sets & Appendices: Descriptions of multinational character sets and reference information, including spare parts lists and error messages.