Installing the Online Interfaces › How to Configure the Online Interfaces Without CA CSM › Install the Cross-Memory Services

Install the Cross-Memory Services

The cross-memory services interface is required for the following online interfaces:

• CICS pseudo-conversational
• IMS
• VTAM
• ISPF/cross-memory
• TSO/cross-memory
• CA Roscoe/cross-memory

This list summarizes the steps to install the cross-memory services. Detailed instructions are in the sections that follow.

1. (Optional) Add the start procedure to PROCLIB for the cross-memory online task.
2. (Optional) Modify, assemble, and link edit the EC2XMCTR module.
3. Define security requirements.
4. To use CA Spool for online or batch printing, add the CA Spool load library CAI.SPOOL.CBQ4LOAD to all STEPLIB DD statements.

Cross-Memory Services Regions

The VTAM and XMS (cross-memory services) interfaces operate in one or more cross-memory online regions.

A cross-memory region can be configured as:

• An XMS only region
• A VTAM only region
• A combination of XMS and VTAM users

Be aware of the following:

• Each cross-memory region is configured with the start-up parameters provided on the PARM= of the execute statement, and with an optional SYSIN DD statement.

  The REGION= specification determines the maximum number of users supported.

• Allow 20 MB (megabytes) for the XMS region plus 1 MB of storage for every two users.

For example, if you specified a REGION of 120 MB, you could specify:

USERMAX=200

If more users are needed, multiple regions can be started under the same SUBSYS= value and will be chained together.

Note: The REGION ID specified in the parameters must be different for each region, and if VTAM interface is used, a different SARAPPL= name will be needed for each region.