IBM Assembler Question: Download IBM Assembler PDF
How are data passed from JCL parm to assembler program. And how is data passed from a calling program to an assembler called program?
Answer:
By convention, general purpose register 1 will have the
address of the parameter list. The list will be a list of
pointers (addresses) to individual parameters. The CALL
macro does this, but you can bypass the CALL macro and be
creative on how you set up the parameter list. Don't forget
the parameter must be on a fullword boundary.
address of the parameter list. The list will be a list of
pointers (addresses) to individual parameters. The CALL
macro does this, but you can bypass the CALL macro and be
creative on how you set up the parameter list. Don't forget
the parameter must be on a fullword boundary.
| Previous Question | Next Question |
| Why can only 256 bytes be moved from one address to another in a MVC? | What is the use of TRT instruction and how it is working? |