Environment

State: Supervisor
Key: 1
AMODE and RMODE considerations
The three Session Manager exits can run in either 24-bit or 31-bit addressing mode and can reside above or below 16 MB in virtual storage. Modules residing below 16 MB in virtual storage (RMODE=24) can have an AMODE of 24, 31, or ANY. Exits that reside in the same load module must have the same addressing mode.
If you link-edit exits with AMODE(24) into either the default environment module or the ADFMDF0A load module, you must include the following statement on the SYSLIN DD statement of the link-edit step. This ensures that the AMODE of the load module is 24.
```
MODE AMODE(24),RMODE(24)
```
If you link-edit exits with AMODE(31) into either the default environment module or the ADFMDF0A load module, you do not have to add a MODE statement on the link-edit step.

For information about 31-bit addressing, see .