RF09/RS09 DECdisk System

This maintenance manual (Volume I) provides comprehensive technical information for the RF09/RS09 DECdisk system, designed for use with PDP-9 and PDP-9L computers. The document covers:

• System Overview: Describes the DECdisk as a peripheral storage system, explaining the fixed-head rotating disk architecture, serial data format, random accessing, and selectable transfer speeds.
• Operations: Details the disk surface recording format (tracks, addresses, segments, and gaps) and system architecture, including control, data transfer, and maintenance sections.
• Programming: Provides instruction sets, programming examples, and guidance for using registers like the ADS (Address of Disk Segment) to optimize performance.
• Modules: Lists and describes the specific electronic modules (G-series, M-series) used within the RF09 controller.
• Maintenance & Installation: Includes detailed chapters on field installation (environmental requirements, power, cabling), organizational maintenance (visual inspection, gain/slice adjustments), and field-level maintenance (calibration, head alignment, and disk assembly repairs).
• Diagnostics: Refers to various diagnostic programs used to verify and calibrate the system.
• Appendices: Contains signal summaries for both the RF09 and RS09 units.