TC11 DECtape System

This document is the official manual for the TC11 DECtape system, designed for use with PDP-11 computers. It covers the following key areas:

• System Overview: Describes the components, including the TC11 controller and TU56 tape transport, and provides physical and electrical specifications.
• Installation: Details the unpacking, physical setup, power cabling, and final checkout procedures.
• Operation: Explains both on-line and off-line operation, including tape mounting, manual control panel functions, and remote programming via commands.
• Programming Information: Provides comprehensive details on device registers (Status, Command, Word Count, Bus Address, and Data), interrupt handling, and function commands used to manage data transfers.
• Theory of Operation: Delivers a deep dive into the controller's logic, including selection, bus control, timing, mark track decoding, parity, and read/write operations.
• Maintenance: Offers guidance on preventive maintenance, visual inspections, cleaning, and head care, along with detailed module utilization lists.
• Appendices: Contains extensive information on DECtape formats, Manchester recording techniques, bidirectional reading/writing, and comparisons of tape formats across different PDP systems.