Rainbow 100+/100B Technical Documentation

This document provides a comprehensive technical specification for the Rainbow 100+/100B computer system. It covers the dual-processor architecture (8088 and Z80A), memory organization, video subsystem (VT102 emulation), and various I/O interfaces, including the RX50 floppy drive and communication ports. The manual details the system firmware, memory mapping, interrupt vectors, and provides specific programming information for graphics and communications options. It is intended for systems programmers and engineers.