CICS COBOL Programming

Mainframe Training Overview

CICS Command Level Programming provides an understanding of the CICS system, application environment and typical applications. The structure of CICS pseudo-conversational application programs are discussed and reviewed in detail.

Basic Mapping Support (BMS) is used to develop screen layouts (maps). These maps, used in the class programming exercises, are the basis for understanding the CICS terminal interface.

A model program is used to develop class programs. The major CICS commands and features are used in class exercises.

Programming access will be use the CICS Command Level Interference of COBOL.

The course consists of a series of lectures, discussions, class exercises, and with hands-on programming workshop problems.

Learning Objectives

As a result of the class, the attendee will be able to -

  • Write, compile, walk-thru, and execute CICS programs
  • Demonstrate the use of major CICS commands
  • Develop user screens utilizing Basic Mapping Support (BMS)
  • Assemble, test, and debug BMS maps
  • Access data in a CICS program from a VSAM file, a DB2 table, a TD queue, a TS queue
  • Compile, debug, and execute CICS programs
Mainframe Training Audience

CICS Command Level Programming is intended for programmers who must understand the flow of CICS and write and debug CICS COBOL application programs.

Mainframe Training Prerequisites

Six months of experience with TSO/ISPF, COBOL programming and JCL is required.

Mainframe Training Course duration

5 days

Mainframe Training Course outline

Day 1

1. CICS concepts and terminology

  • CICS concepts, facilities, components
  • Eight steps in CICS program development
2. Using Basic Mapping Support (BMS)
  • IBM 3270 display screen characteristics
  • Coding BMS macros instructions
Day 2

3. CICS Command Level programming
  • Program design concepts
  • Pseudo-conversational
  • Command Level COBOL
4. Program Design (beyond the basic commands)
  • The EXEC Interface Block (EIB)
  • Terminal Control
  • CICS File Control commands
  • Exceptional Condition Control
  • Special programming techniques
Day 3

5. Program control facilities
  • 'Transfer' to another program (XCTL)
  • 'Link' to a sub-program (LINK)
  • Return control (RETURN)
  • The COMMunications Area
Day 4

6. Test and Debugging

Day 5

7. Overview of storage control facilities
  • Transient data queues
  • Temporary storage queues
  • Journaling
  • CICS system tables
8. Sample Application program - A review of a Program

9. Workshop exercises
  • A. Testing your BMS map
  • B. A first program
  • C. Read and update a file
  • Appendix A - Exception Conditions
  • Appendix B - EIB (Execution Interface Block) Fields
  • Appendix C - Program Check Conditions
  • Appendix D - Sample Attribute Byte Control Characters
  • Appendix E - Cobol Functions Not Supported By CICS
  • Appendix F - Class Standards
  • Appendix G - Class Refresher Questions
  • Appendix H - 6 Model BMS Fields
  • Appendix I - CICS Copy Books - DFHAID, DFHBMSCA
  • Appendix J - CICS Test VSAM file access Program
  • Appendix K - CICS Test Map
  • Appendix L - CICS Test VSAM Data
  • Appendix M - CICS Test DB2 Table access Program
  • Appendix N - CICS Test DB2 Table data
  • Appendix O - DTCN - IBM CICS Debug Tool
  • Appendix P - ENTER TRACENUM CICS Command
  • Appendix Q - InterTest Overview

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