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Teaching System z Assembler with VisibleZ

Teaching System z Assembler with VisibleZ. Dr. David E. Woolbright TSYS School of Computer Science Columbus State University June 10, 2013. Why my department and I got involved with Assembly Language. Local Fortune 500 companies needed hundreds of programmers Credit card transactions

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Teaching System z Assembler with VisibleZ

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  1. Teaching System z Assembler with VisibleZ

    Dr. David E. Woolbright TSYS School of Computer Science Columbus State University June 10, 2013
  2. Why my department and I got involved with Assembly Language Local Fortune 500 companies needed hundreds of programmers Credit card transactions Life 70 Insurance software
  3. What is VisibleZ? Freeware An object code interpreter A visualization tool for watching instructions execute on a System/z machine emulator A tool for learning new assembler instructions A tool for teaching IBM instruction architecture A collection of Java classes
  4. Where can you get the software? http://csc.columbusstate.edu/woolbright/vzhomepage.htm
  5. Where can you find resources for teaching/learning assembler? Assembler Resources Page: http://csc.columbusstate.edu/woolbright/woolbrig.htm
  6. Where can you read a blog about assembler? My Assembler Blog: http://punctiliousprogrammer.com/
  7. What’s on the websites? Softwaredownload General articles about programming assembly language (Base/Displacement Addressing, DSECTs, Looping,…) Articles about specific instructions (semantics and programming tips) A video course (in development) VisibleZclassroom lessons A book (soon to be posted as a pdf)
  8. What’s included in the product download? A BlueJ project with lots of Java code (> 100 classes) A \Codes directory with one or more object code programs for every supported instruction
  9. Versions Desktop – 32 bytes per row in the memory display Low Res – 16 bytes per row (projection) Android Pad (Honeycomb) – in development A version with complete source code An executable jar version
  10. VisibleZ Main Panel
  11. A small operating system area
  12. Registers
  13. Program Status Word
  14. Information about the current instruction
  15. Color coding of instructions
  16. Load, Cycle, Reset, Reload Buttons
  17. Simple File Support
  18. Parameter Passing
  19. VisibleZ is Object-oriented
  20. Each instruction is a Class with an execute( ) method public void execute() { // Instructions have access to Register, // Memory, PSW, … objects // The execute( ) method manipulates // the objects to provide the semantics // of each instruction }
  21. Topics Where VisibleZ Can Help Loading base registers (baseregister.obj) Linkage conventions (linkage.obj) Branching logic (clc.obj) Instruction formats (readingobjectcode.obj) Parameter passing (parms.obj ) Individual instructions (there are object code programs for all the supported instructions)
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