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Course Catalog » Assembler Curriculum » z/OS Assembler Language Series

Assembler Introduction

5 hours



The Assembler Introduction course discusses the basics of mainframe assembler programming covering number systems, architecture, instructions, syntax and addressability.


System programmers or application programmers who code Assembler programs or maintain system related programs and user exits.


Knowledge of programming concepts and experience with IBM MVS architecture.


After completing this course, the student will be able to:

  • Identify types of number systems and convert numbers between them
  • Identify the system components involved in Assembler programming
  • Recognize coding conventions as they apply to an Assembler program in a z/OS operating system environment
  • Recognize the Assembler process and system structures, such as source, object and load units, and program objects

Course Content

Number Systems

Overview of Number Systems

Conversions between Decimal, Binary and Hexadecimal Number Systems

Data Types - Packed and Zoned Decimal

Signed and unsigned numbers

Code Pages and EBCDIC character representation

System Architecture

Overview of Systems Architecture

Virtual Storage

Registers - General Purpose, Access, Control, Floating Point

Defining Storage and Alignment

Residency and Access Modes

System Components

Program Status Word (PSW)

Assembler Code Mnemonics

Types of Interrupts

Condition Codes and Extended Mnemonics

Assembly and Linkage

Assembler Language - Elements

Syntax Notation

The Assembly Process

Assembler Statements and Syntax

Assembler Symbols

Assembler Directives

Assembler Language - Addressability

Establishing Addressability

Setting and Dropping Base Registers

Address Storage using Base Registers

Module Reusability Options

Assembler Introduction Mastery Test

Course Catalog » Assembler Curriculum » z/OS Assembler Language Series
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