RX02 Floppy Disk System

This document is a comprehensive technical manual for the Digital Equipment Corporation RX02 Floppy Disk System. It provides detailed information for setting up, operating, programming, and maintaining the system in various configurations.

The manual begins with a general description of the RX02, a low-cost, random-access mass memory device that stores data on preformatted flexible diskettes. It outlines the system components, which include one or two disk drives, read/write electronics, a microprogrammed controller, and a power supply, housed in a rack-mountable chassis. The RX02 interfaces with PDP-8, PDP-11, or LSI-11 computers via specific interface modules and supports both single-density (IBM 3740 compatible) and double-density (Digital system compatible) recording, offering varied storage capacities.

Key sections cover:

• Specifications: Details on system reliability, drive performance (capacity, transfer rates, access times), environmental characteristics (temperature, humidity), and electrical requirements.
• Installation: Step-by-step procedures for site preparation, unpacking, physical installation, cabling, AC power modification (for 50Hz versions), environmental considerations, and initial testing using diagnostics.
• User Information: Guidelines for responsible media care, handling practices, diskette storage, operating instructions, and an operator troubleshooting guide for common issues.
• Programming: Extensive information on programming the RX02 for different computer interfaces (RX8E, RX28, RX11, RXV11, RX211, RXV21). This includes device codes, instruction sets, register descriptions, function codes (e.g., Fill Buffer, Write Sector, Read Sector), error recovery procedures, and programming examples.
• Theory of Operation: A detailed functional description of the system's hardware and micro-CPU software, including overall block diagrams, interface module signal descriptions, and explanations of the microprogrammed controller's architecture and subroutines, as well as the mechanical drive mechanisms.
• Maintenance: Procedures for equipment care, troubleshooting with and without diagnostics, error code probable causes, and detailed instructions for the removal and replacement of various modules and drive components.

The manual aims to provide users with all necessary information to effectively utilize and service the RX02 Floppy Disk System.