Advanced Assembler Language Coding Workshop – ES35GCR

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Course Code: ES35G Brand: IBM Z – Mainframe Category: Systems Skill Level: Advanced Duration: 32H Modality:CR      Audience


This course is designed for application programmers and beginning system programmers who code, maintain, and debug application support programs or subroutines written in S/390 assembler language.

  Prerequisites


You should be able to:

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  • Code and debug simple S/390 assembler language programs
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  Short Summary


This course is designed for application programmers and beginning system programmers who code, maintain, and debug application support programs or subroutines written in S/390 assembler language.  Overview


This course provides instruction and practice in the use of the more complex S/390 Assembler Language facilities for the experienced assembler language programmer. The course includes a discussion of standard linkage conventions, use of BSAM/QSAM and selected system macros, the macro definition language, and reentrant coding considerations.

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Emphasis is placed on enhancing skills in problem resolution through analysis of more complex system-provided dumps.

  Topic


Day 1

  • (00:15) Welcome
  • (01:00) Unit 1: Review
  • (00:15) Unit 2: Assembler instructions
  • (01:45) Unit 3: Linkage
  • (01:30) Unit 4: LE date/time handling
  • (02:30) Exercise 1: PARM handling and search

Day 2

  • (00:15) Lab review
  • (03:00) Unit 5: Access methods: BSAM/QSAM
  • (03:00) Exercise 2: File handling

Day 3

  • (00:15) Lab review
  • (00:30) Unit 6: Assembler compile-time options
  • (00:30) Unit 7: SNAP dumps
  • (03:30) Unit 8: Macros and the Conditional Assembly Language
  • (02:30) Exercise 3: Macro modification

Day 4

  • (00:25) Lab review
  • (01:15) Unit 9: Miscellaneous instructions
  • (00:25) Unit 10: Floating point data
  • (00:25) Unit 11: Reentrant coding
  • (00:15) Class wrap-up

  Objectives


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  • Identify data management considerations and access methods
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  • Code assembler language programs which:_x000D_
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    • Conform to standard linkage conventions using save area chaining
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    • Define and use BSAM/QSAM datasets through standard I/O macros
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  • Define and execute user macros which contain:_x000D_
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    • Positional and/or keyword parameters
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    • Fixed or variable entry parameter lists
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    • Conditional assembly logic
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  • Use variable length storage operations (that is, EX, MVCL, and so on)
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  • Employ more complex instructions (that is, TR, TRT, BXLE, and so on)
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  • Access JCL parameter data
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  • Employ LE date/time handling services
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  • Identify reentrant coding considerations and dynamic storage acquisition
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