Compatibility Guide

Table of Contents

Index

Chapter 1: IBM/370 Mainframe Compatibility

• 1.1 Configuring your COBOL System
• 1.2 Migrating your Applications
• 1.3 Conversion Issues
  • 1.3.1 General
    • 1.3.1.1 Error Message Differences
    • 1.3.1.2 Files not Supported
    • 1.3.1.3 The DISK FULL Condition
    • 1.3.1.4 Arithmetic Operations
    • 1.3.1.5 Intermediate Result Precision
    • 1.3.1.6 The COMPUTE Statement
    • 1.3.1.7 PIC 9 Items
    • 1.3.1.8 ACCEPT Statements
    • 1.3.1.9 DISPLAY Statements
    • 1.3.1.10 The SIGN SEPARATE Clause
    • 1.3.1.11 Comparisons of Alphanumeric Data
    • 1.3.1.12 Pointer Variables (VS COBOL II Only)
  • 1.3.2 File Input and Output
    • 1.3.2.1 File Referencing
    • 1.3.2.2 The NOMINAL KEY Clause
    • 1.3.2.3 The ACTUAL KEY and TRACK-LIMIT Clauses
    • 1.3.2.4 The TRACK AREA Clause
    • 1.3.2.5 Deleting Records
    • 1.3.2.6 Record Lengths
  • 1.3.3 Inter-program Communication
    • 1.3.3.1 Calls to Subprograms