Day One

Program linkages

• Control Sections
• Save Areas
• Addressability
• Return Codes
• Typical Linkages
• SAVE and RETURN macros
• Getting the PARM value from EXEC statement

Working with files

• Data set organizations and access methods
• DCB Macros
• OPEN, GET, PUT, CLOSE
• Error handling: SYNAD routines
• ABEND macro
• Computer Exercise:  Basic Program Linkages and QSAM Files

Subroutines and the Program Binder

• CSECTs and the Program Binder
• Assemble, Bind, and Run Data Flow
• Anatomy of an Assembly Listing
• Assembler PARMs
• Subroutines: the CALL macro
• Object Modules and Load Modules
• Program Binder control statements and PARMs
• Managing Print Files
• Computer Exercise:  Subroutine Linkages

Day Two

Program Binder and Maintenance

• Impact of Changes to a Subroutine
• Additional Program Binder Control Statements
• Program Binder Processing
• Computer Exercise:  The Program Binder and Maintenance

Debugging and Dump Reading

• Computer Exercise:  ONION
• Guidelines for Debugging
• Program Termination
• IBM Publications
• Quick Reference
• File Related Messages
• Common System Completion Codes
• z/OS Structure
• Essential Control Blocks
• Dump Reading
• Debugging: The Larger Context

Some System Services

• WTO – Write To Operator
• SNAP – Take a Snapshot Dump
• TIME – Get the Date and Time
• STCKCONV – Convert a STCK value to Date and Time Format
• CONVTOD – Convert a Date and Time value to TOD Format

Variable Length Records

• Defining
• Processing
• Computer Exercise:  Variable Length Records

Day Three

QSAM Locate Mode

• GET and PUT using locate mode
• Update-in-place: PUTX

31-Bit Addressability Considerations

Dynamic Linkages

• Static Linkages
• Dynamic Linkages
• Module Attributes
• The Search for Modules
• LOAD
• DELETE
• LINK
• Reusable and Reenterable programs
• Computer Exercise:  Dynamic Serial Linkages

XCTL and Storage Management

• XCTL – an introduction
• GETMAIN / FREEMAIN
• Subpools
• XCTL Resumed
• Computer Exercise:  Using XCTL

Writing Reentrant Programs

• Writing Reentrant Programs
• Reentrant Save Area Chaining
• Reentrant I/O
• Reentrant Processing
• Sample Reentrant Program
• Computer Exercise:  Making a Program Reentrant

I/O and Amode 31

• AMODE 31 I/O Issues
• AMODE 31, RMODE 24
• AMODE 31, RMODE ANY