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Exercise-assembler - 1 Write a simple assembler program...

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1. Write a simple assembler program which does nothing other than a return to caller to check out the operation of the JCL and submitting jobs to batch. Make sure that you understand the process including using the SDSF facility. Check out how you can set the return code via register 15. 2. Include a WTO in the above program and observe how a macro expands by examining the listing. Modify the WTO to allow you to change the text of the message in your program. 3. Write a program with different data types defined and examine the object code generated for this. Understand entry and exit linkages. 4. Write a program with a CSECT larger than 4096 bytes and understand how to define and use more than one base register. 5. Write a program that uses literals and understand how assembler converts a literal into object code. 6. Write a program that calls a sub program using a V type constant. 7. Write a main program and a sub program ADD that adds two integers passed by the main program and returns an Integer result in the third passed argument.
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