Mainframe Software

  I spent about 50 years working on IBM mainframes and I wish the Wintel world were as easy to master as the mainframe world. Today’s CISC mainframes have a much larger instruction set than Intel systems. This means there’s a lot more to learn but it also allows the code to be much cleaner, elegant and coherent and by reducing the number of instructions, reduces the logical complexity of programs and thus reduces errors. Coding in Assembler does require a knowledge of the hardware as well as the principles of programming and logic. I’d venture to say that if all the people coding high-level or scripting languages had to understand their hardware at the instruction level, most would be doing something else for a living.
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