This class is an introduction to Assembler Language programming. Topics include an overview of computer architecture, review of instruction formats, and basic assembler language instructions.

Mainframe Training Audience

This class is intended for programmers or operators that have a good understanding of basic OS/390 architecture.

Mainframe Training Prerequisites

Experience with a programming language preferred.

Mainframe Training Course duration

5 days

Mainframe Training Course outline

Introduction to computer systems architecture
	Review how data is represented in storage. Introduce addressing concepts; absolute and relative. Examine the use of registers and how they are used in instructions. Introduce the Program Status Word (PSW).
Basic Instructions
	LOAD/STORE instructions. MOVE instructions Data definitions
Assembler Language Program Structure
	Introduction to save/restore register conventions. Overview of general register usage. Establishing program addressability.
Conditional Instructions
	COMPARE instructions. BRANCH instructions
Basic I/O Operations
	Introduction to macros. OPEN/CLOSE processing of sequential files GET/PUT using QSAM.
Mathematical Operations
	Arithmetic operations using decimal instructions. Performing binary arithmetic operations.