VTAM Cross-Memory Notes

Be aware of the following:

For VTAM only regions, you can start the primary RMOXMS task with the XMSSUB=NO parameter. However if this is not a VTAM only region, we recommend that you start the primary RMOXMS region with the XMSSUB=YES parameter.
If multiple RMOXMS regions are started, they must be started with XMSSUB=NO parameter.
Only the primary XMS region can have XMSSUB=YES specified.
VTAM only XMS regions can have the XMS=NO parameter to make it accessible.
All XMS interfaces require the EC1XMCTR table. You must assemble the table during installation to:
- Define the relationship between CA Deliver and CA View database high-level qualifiers and the session options to be used
- Provide information used to build the XMS database table. Only the database high-level qualifier is used for VTAM XMS users.
Specify the RMOAPPL=applid parameter. This parameter provides VTAM user signon capability.
Note: When you are using multiple VTAM XMS regions, each region must have a unique applid.
To pass VTAM signon requests to other XMS regions, specify the VTAMPASS=YES parameter.
When you are using multiple VTAM XMS regions, the values for LGNFMT=, RMOVDTB=, VTMQUERY=, and VTMSAA= must be the same in each region. Otherwise, the XMS interface may react in unpredictable ways.
To activate the VTAM generic resource support for your cross memory regions, specify the VGRAPPL= parameter.
Note: For more information about VTAM generic resources, see the following topic.