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Using z/OS Assembler

This course focuses on basic assembler language coding. Students gain fundamental assembler language programming and debugging skills that are applicable for both MVS and VM assembler language programmers.

Students learn to:

  • Define storage and data constants.
  • Use the binary and decimal arithmetic instructions.
  • Use the compare instructions.
  • Branch according to the results of compare and arithmetic operations.
  • Code looping and array processing routines.
  • Call subroutines using standard linkage convention.
  • Read and analyse program dumps.
  • Code more complex instructions such as EX, TR and TRT.


09 sep5Eweb based 2680 EUR (excl. BTW)
21 okt5Eweb based 2680 EUR (excl. BTW)

Intended for

Anyone who needs to read, write, modify, or debug assembler language programs. It is also valuable for those who need to refresh their basic assembler language programming skills.


To benefit from this course, participants need:

  • To know either the TSO/ISPF editor (see ISPF/PDF basics) or CMS editor or basic CMS commands.
  • A working knowledge of binary and hexadecimal arithmetic.

Main topics

  • The basics of the system 370 assembler language are taught in order to write and debug assembler language programs
  • Creation of new assembler language programs
  • Maintenance of existing assembler language programs
  • Diagnosis of failing assembler language programs
  • Improved efficiency of the use of assembler language programs
  • The opportunity to diagnose error situations using dump material

Training method

Lecturing and exercises.


5 days.

Course leader

RSM Technology.