Installing the Online Interfaces › How to Configure the Online Interfaces Without CA CSM › TSO, ISPF, CA Roscoe and Cross-Memory Address Spaces

TSO, ISPF, CA Roscoe and Cross-Memory Address Spaces

TSO, ISPF, or CA Roscoe cross‑memory access involves address spaces and subtasks as follows:

• TSO or CA Roscoe address spaces

  The TSO command, ISPF, or CA Roscoe application program resides here. If ISPF/XMS is being used with ISPF split‑screen active, up to two sessions can be executing at the same time, to the same database, or different databases.

• XMS Support Subtask

  This subtask is started when XMSSUB=YES input parameter is used when starting an XMS address space. The subtask can be in a separate XMS address space, or it can share the address space with XMS or VTAM sessions.

  • The XMSSUB=YES parameter must only be used in an XMS address space with a default subsystem ID (SUBSYS=XMC1 or not specified).
  • If multiple XMS address spaces are started, only one can have the XMSSUB=YES specified.

  Note: All IMS/DC, TSO/XMS, ISPF/XMS, and CA Roscoe/XMS sessions share the same XMS subtask.

• XMS address spaces

  The XMS regions must have the XMS=YES parameter to make them accessible.

  Note: The SUBSYS= parameter must match the EC1XMCTR table entry for the database.

  Multiple address spaces can be used if needed.

Multiple Cross-Memory Region Requirements

Be aware of the following:

• All cross‑memory regions started under the same SUBSYS ID are chained together.
• The REGIONID positional parameter is the first value of the PARM= statement for the cross‑memory task.

  You must specify a different REGIONID for each started cross‑memory region.

• The value of the XMSSUB parameter for the primary region depends on the type of XMS region you are defining.

See this table for the XMSSUB values. Specify XMSSUB=NO for all other started regions.

Note:

• You must specify XMS=YES for all other started regions except for VTAM‑only regions where XMS=NO is permissible.
• Each VTAM cross‑memory region requires a different applid. The applid is specified using the SARAPPL= parameter.
• Each VTAM cross‑memory region requires VTAMPASS=YES.
• The VTAM administrator must verify that each VTAM cross memory applid has this setting:

  AUTH=(PASS,ACO)