Planning the characteristics of the address space

Before you issue the ASCRE macro, you have some planning to do and some actions to take. For a list of the questions you have to consider before you issue the macro, look at Table 1. This figure lists the questions, describes the actions that you might take, and points you to the section in this section where you can find information about the action.

Table 1. Planning considerations for the new address space
Considerations	Actions that Might Follow	Reference
Which parameter identifies the procedure in SYS1.PROCLIB that identifies the first program to run in the new address space?	Specify either ASNAME or STPARM on the ASCRE macro.	Identifying a procedure in SYS1.PROCLIB
Do any data sets need special DD statements?	Supply the DD statements in the SYS1.PROCLIB member.	Identifying a procedure in SYS1.PROCLIB
Does the address space need an initialization routine?	Write an initialization routine and specify it on the INIT parameter.	The address space initialization routine
Will the new address space be able to provide cross memory services for programs in other address spaces?	Code the cross memory macros in the initialization routine.	The new address space as service provider
Will programs in the new address space be able to call programs in the creating program's address space?	Code the TKLIST, LXLIST, and AXLIST parameters on the ASCRE macro.	The new address space as cross memory user
Does the address space need a termination routine?	Write a termination routine and code the TRMEXIT and UTOKEN parameters.	Providing an address space termination routine
How will the system dispatch programs in the new address space?	Code NONURG or HIPRI on the ATTR parameter on the ASCRE macro.	Establishing attributes for address spaces
Will the address space exist after the creating task terminates?	Code PERM on the ATTR parameter on the ASCRE macro.	Establishing attributes for address spaces