TC11 DECtape System Manual

Company:	Digital Equipment Corporation
Part:	DEC-11-HTCB-D
Date:	1972-10

Chapter 1 General Description
- 1.1 Introduction
- 1.2 General Description
  - 1.2.1 TU56 Tape Transport
  - 1.2.2 TC11 Controller
  - 1.2.3 Magnetic Tape
- 1.3 Specifications
- 1.4 Engineering Drawings
- 1.5 Terminology
Chapter 2 Installation
- 2.1 Scope
- 2.2 Configuration
- 2.3 Unpacking
- 2.4 Inspection
- 2.5 Space Requirements
- 2.6 Power and Cable Requirements
- 2.7 Installation
- 2.8 Final Checkout
Chapter 3 Operation
- 3.1 Introduction
- 3.2 Controls and Indicators
  - 3.2.1 Tape Transport Control Panel
  - 3.2.2 Controller Maintenance Panel
  - 3.2.3 Function Indicators
- 3.3 Operating Procedure
  - 3.3.1 Mounting Tape
  - 3.3.2 On-Line Operation
  - 3.3.3 Off-Line Operation
  - 3.3.4 Removing Tapes
  - 3.3.5 Formatting Tapes
Chapter 4 Programming Information
- 4.1 Scope
- 4.2 Device Registers
- 4.3 Interrupts
- 4.4 Function Commands
- 4.5 Timing Considerations
  - 4.5.1 Data Rate
  - 4.5.2 Transport Motion
  - 4.5.3 Latency
- 4.6 Programming Notes
- 4.7 Program Examples
Chapter 5 Theory of Operation
- 5.1 Introduction
- 5.2 Tape Format
- 5.3 Functional Description
- 5.4 Block Diagram Description
- 5.5 Address Selection
  - 5.5.1 Address Selector Module
  - 5.5.2 Gating Logic
- 5.6 Bus Control
  - 5.6.1 NPR Transfers
  - 5.6.2 Interrupt Request
  - 5.6.3 Slave Response
- 5.7 Bus Drivers and Receivers
- 5.8 Registers
  - 5.8.1 Register Control
  - 5.8.2 Command Register
    - 5.8.2.1 Error Bit (15)
    - 5.8.2.2 Maintenance Bit (13)
    - 5.8.2.3 Delay Inhibit Bit (12)
    - 5.8.2.4 Reverse Bit (11)
    - 5.8.2.5 Unit Select Bits (10-08)
    - 5.8.2.6 Ready Bit (07)
    - 5.8.2.7 Interrupt Enable Bit (06)
    - 5.8.2.8 Extended Bus Address Bit (05 and 04)
    - 5.8.2.9 Function Bits (03, 02, 01)
    - 5.8.2.10 DO Bit (00)
  - 5.8.3 Status Register (TCST)
    - 5.8.3.1 End Zone Error
    - 5.8.3.2 Parity Error
    - 5.8.3.3 Mark Track Error
    - 5.8.3.4 Illegal Operation Error
    - 5.8.3.5 Selection Error
    - 5.8.3.6 Block Miss Error
    - 5.8.3.7 Data Miss Error
    - 5.8.3.8 Nonexistent Memory Error
    - 5.8.3.9 Up-To-Speed
    - 5.8.3.10 Clock
    - 5.8.3.11 Maintenance Mark Track
    - 5.8.3.12 Data Tracks
    - 5.8.3.13 Extended Data
  - 5.8.4 Data Register (TCDT)
  - 5.8.5 Word Count Register (TCWC)
  - 5.8.6 Bus Address Register (TCBA)
  - 5.8.7 Read/Write Buffer Register (RWB)
- 5.9 Tape Control
  - 5.9.1 Unit Select
  - 5.9.2 Tape Motion Control
  - 5.9.3 Mark Track Decoder
  - 5.9.4 Shift Register (Window)
    - 5.9.4.1 Block Mark Decoding
    - 5.9.4.2 Data Sync and Block Start Decoding
    - 5.9.4.3 Data Word Decoding
    - 5.9.4.4 Block End Decoding
    - 5.9.4.5 Block Sync Decoding
  - 5.9.5 Timing State Generator
  - 5.9.6 Timing Track Decoder
- 5.10 Timing Logic
- 5.11 Parity Logic
- 5.12 Maintenance Mode Logic
- 5.13 Read Operation
- 5.14 Write Operation
Chapter 6 Maintenance Aids
- 6.1 Scope
- 6.2 Preventive Maintenance
  - 6.2.1 Visual Inspection
  - 6.2.2 Tape Handling
  - 6.2.3 Cleaning Tape Reels
  - 6.2.4 Storing Tapes
  - 6.2.5 Physical Distortion
  - 6.2.6 Accidental Erasure (or Saturation)
  - 6.2.7 Head Care
Chapter 7 Module Descriptions
- 7.1 Introduction
- 7.2 DEC Logic
- 7.3 Measurement Definitions
- 7.4 Loading
- 7.5 Module Characteristics
  - 7.5.1 G879 Transport Detector
  - 7.5.2 G888 Manchester Read/Write Amplifier
Appendix A DECtape Format
- A.1 Introduction
- A.2 Recording Device
  - A.2.1 Writing
  - A.2.2 Reading
- A.3 Recording Method
  - A.3.1 Return-to-Zero (RZ)
  - A.3.2 Pulse Recording
  - A.3.3 Non-Return-to-Zero (NRZ)
  - A.3.4 Phase Modulation (Manchester Method)
- A.4 Bidirectional Reading and Writing
  - A.4.1 Mark Track Reading
  - A.4.2 Data Track Reading
- A.5 Tape Format
  - A.5.1 Basic Tape Format
  - A.5.2 Block Format
  - A.5.3 Nonstandard Formats
Appendix B Comparison of DECtape Formats

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TC11 DECtape System Manual

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