Table Of Contents - IBM 5280 Programmer's Manual

Contents
To the COBOL Programmer iii
Before Using This Guide iii
Scope of the Guide iii
Organiza tion of the Guide iii
Objectives of the Guide iii
Writing A Work Station Application iv
Data Communications iv
Diskette I/O iv
Printer and Other I/O iv
Compiling a COBOL Program on the Host System v
Executing a COBOL Program on an IBM 5280 System v
Debugging COBOL Programs v
Related Publications v
References for Coding and Debugging COBOL Programs v
Coding Aids for Transaction I/O v
References for Executing a COBOL Program v
General References for IBM 5280 System Information v
Compilation Under OS/VSl vi
Compilation Under OS/VS2 vi
Compilation Under DOS/VSE vi
Chapter 1. Transaction I/O - Introduction 1-1
Defining Display Screens 1-1
Uses of Data Definition Statements 1-1
The Copy Library and Data Definition Statements 1-1
Copying Members 1-2
General Rules for Data Definition Statements 1-2
The COBOL Program and Data Definition Statements 1-2
Steps in Writing an Interactive Program 1-2
The Keyboard 1-5
Command and Function Key Codes 1-5
Function Keys 1-7
Attention 1-7
Auto Dup/Skip 1-8
Auto Enter 1-8
Character Advance 1-8
Character Backspace 1-8
Character Delete 1-9
Character Insert 1-9
Cursor Left 1-9
Cursor Right 1-9
Duplicate 1-10
End-of-Job 1-10
Enter/Record Advance 1-10
Field Advance 1-10
Field Backspace 1-10
Field Exit 1-11
Field Exit Minus 1-11
Hexadecimal 1-12
Record Advance 1-12
Record Backspace 1-12
Reset 1-12
Skip 1-12
System Request 1-13
Chapter 2. Transaction I/O - Screen Definition 2-1
Example of Coding Data Definition Statements 2-1
Coding Conventions 2-9
Primary, Continuation, and Secondary Lines 2-9
Continuation Characters 2-9
Keywords 2-9
Constants 2-10
Comment Statements 2-10
Record Description Statements 2-11
Sequence Number Field (Columns 1 through 5) 2-11
Form Type Field (Column 6) 2-11
Name Type Field (Column 17) 2-11
Record Name Field (Columns 19 through 26) 2-11
Usage Field (Column 38) 2-11
Editing Field (Columns 45 through 80) 2-12
CHECK(DD) 2-12
DSPATR(attributes) 2-13
Field Description Statements 2-15
Sequence Number Field (Columns 1 through 5) 2-15
Form Type Field (Column 6) 2-15
Indicator Field (Columns 9 and 10) 2-15
Field Name Field (Columns 19 through 24) 2-15
Length Field (Columns 30 through 34) 2-16
Data Type Field (Column 35) 2-16
Decimal Positions Field (Column 37) 2-18
Usage Field (Column 38) 2-18
Location Field (Columns 39 through 44) 2-20
Editing Field (Columns 45 through 80) 2-21
CHECK (parameters) 2-21
DSPATR (attributes) 2-22
PMT(message) 2-24
SHIFT(codes) 2-24
Keyword Conflicts and Compatibilities 2-25
Chapter 3. Transaction I/O - Writing the COBOL Program 3-1
Summary of COBOL Transaction I/O Statements 3-1
FILE-CONTROL Paragraph 3-1
OPEN 3-2
WRITE 3-2
READ 3-3
Sequence of Transaction I/O Statements 3-4
Clearing the Screen with WRITE 3-4
CLOSE 3-4
I/O Error Processing 3-4
Status Key 3-4
Coding the Status Key 3-5
Exception/Error Procedures 3-5
Example Using Status Key and ERROR Procedures 3-5
Return Information 3-5
Attribute Data 3-6
Work Station Control Area 3-7
Transaction I/O Examples 3-7
Example - Interactive Entry and Processing 3-7
INDICATOR Example 3-13
Chapter 4. Data Communications Programming With COBOL 4-1
Uses of Data Communications Programs 4-1
Eligible Systems 4-1
COBOL Programs and the Communications Access Method 4-1
COBOL Program Responsibilities 4-2
System Requirements for Communication Programs 4-2
Before Running a Data Communication Program 4-2
Writing COBOL Communication Statements 4-2
Communication Routine Parameters 4-3
Communication Program Example - Explanation 4-3
Open Routine 4-3
Close Routine 4-4
Read Routine 4-5
Write Routine 4-6
Communication Program Example - Listing 4-6
Chapter 5. Diskette Input/Output 5-1
Input-Output Summary 5-1
Contents vii