Assembler Cross Memory Services

Duration

3 to 4 hours

Overview

Audience

System or application programmers who code Assembler programs or maintain system related programs and user exits; this course reinforces good Assembler programming techniques and introduces more advanced techniques including cross memory services, access registers and data-in-virtual.

Prerequisites

Completion of the Assembler Introduction, Assembler Instructions, Assembler Macros and Assembler Programming courses plus a sound knowledge of programming concepts, and experience with IBM z/OS architecture.

Objectives

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

• Cross memory instructions and linkage
• Cross memory clients and services
• Access registers and Data in Virtual

Course Content

Cross Memory Addressing

Address Space Areas
Service Providers
Communication
Standard Program Calls
Authorization

Cross Memory Service Routines

Functional PC Routines
Writing a Service Provider
Cross Memory User

Access Registers and Data-In-Virtual

Access Registers
Copy Access Instruction
Data in Virtual
Identify Service

 

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