IBM 3741 Manuals

Table of Contents

• • 3

    Table of Contents

• 7

  Chapter 1. Ibm 3740 Data Entry System

  • 7

    System Overview
    • 9

      IBM 3741 Data Station and IBM 3742 Dual Data Station Overview

• 12

  Chapter 2. IBM Diskette

  • 12

    Disk Layout
    • 13

      Index Track Layout
    • 14

      Index Track Data Set Labels

• 16

  Chapter 3. Data Station Operating Information

  • 16

    Buffers
  • 16

    Modes of Operation
    • 16

      Enter Mode (E)
    • 17

      Update Mode (U)
    • 17

      Verify Mode (V)
    • 17

      Modulus
    • 19

      Field Correct Mode (C)
    • 19

      Search Mode (S)
    • 22

      Read Index Mode (X)
    • 22

      Modify Mode (M)
    • 22

      Field Totals Mode (F)
  • 23

    Starting Information
  • 23

    Record Advance Operation
  • 24

    Deleted Records
    • 24

      Mode Considerations for Deleted Records
  • 24

    CE Mode

• 25

  Chapter 4. Operator Interface

  • 25

    Display
  • 26

    Keyboard
    • 26

      Switches
    • 26

      Function Select Keys
    • 27

      Character Keys
    • 27

      Function Keys

• 32

  Chapter 5. Programming Information

  • 32

    Program Coding
  • 32

    Loading a Program
  • 32

    Selecting a Program
  • 34

    Displaying a Program
  • 34

    Modifying a Program
  • 34

    Program Chaining
  • 35

    Operator Guidance

• 36

  Chapter 6. Production Statistics

  • 36

    Counters
    • 36

      Keystroke Counter
    • 36

      Record Counter
    • 36

      Verify Correction Keystroke Counter
  • 36

    Displaying Production Statistics

• 37

  Chapter 7. Field Totals

  • 37

    Online Field Totals
    • 37

      Displaying Field Totals
    • 37

      Read Out/Reset Fields
    • 38

      Online Field Total Restrictions
    • 38

      Example
  • 39

    Offline Field Totals
    • 39

      Selecting Offline Field Totals
    • 39

      Mask Statements
    • 40

      Displaying Offline Field Total Accumulators
    • 40

      Writing Field Totals Into Record On Disks
    • 40

      Example

• 43

  Chapter 8. Second Disk

  • 43

    Dual Disk Preparation On 3742
  • 43

    Dual Disk Operation On the 3741 and 3742
  • 44

    Search Operations On the Second Disk
  • 44

    Copy
    • 44

      Copy All or Part of Disk 2
    • 44

      Copy All or Part of a Data Set
    • 45

      Copy Up to a Specified Record On Disk 2
    • 45

      Handling Disk Errors That Occur While Copying All or Part of Disk

• 46

  Chapter CHAPTER 9. DISK INITIALIZATION

  • 47

    Initialization Procedure
  • 47

    Disk Checking

• 48

  Chapter 10. Self-Check Feature

  • 48

    Computing the Self-Check Digit
    • 48

      Modulus 10

• 50

  Chapter 11. Communigations

  • 50

    Teleprocessing Bibliography
  • 51

    Programming Support
    • 51

      Networks
    • 52

      Communications Facilities
    • 52

      Communications Throughput
    • 55

      3741 Transmission Modes
  • 55

    Features
    • 55

      Synchronous Clock Feature
    • 56

      Terminal Identification Feature
    • 56

      Operator Identification Card Reader Feature
    • 57

      Keylock Feature
  • 57

    Operating Procedures
  • 57

    Communication Modes
    • 57

      Transmit Mode (T)
    • 62

      Transmit-Transparent Mode (P)
    • 62

      Receive Mode (R)
    • 63

      Transmit/Receive Mode (B)
    • 63

      Transmit-Transparent/Receive Mode (D)
  • 63

    Communications Example
  • 64

    Line Termination and Error Conditions
    • 64

      Termination of Data Call
    • 65

      BSCA Error Conditions and Indications
    • 66

      BSCA Disk Errors
    • 67

      Track and Sector Indicators
    • 67

      Status Message Format