LOAD command
You can use the AMODE, RMODE, and ORIGIN options to set the addressing mode and residency mode of the text file you load. Addressing mode and residency mode values specified on the LOAD command override any values set at assembly time. Also, note that ORIGIN and RMODE are mutually exclusive parameters; you cannot specify both on the same LOAD command.
The AMODE option lets you specify an addressing mode (24, 31, or ANY) to the program you load. The RMODE option specifies the residency mode (24 or ANY).
The ORIGIN option lets you specify an address where CMS is to load a program and, therefore, sets the residency mode implicitly. If you specify an ORIGIN address 16MB or greater, the program is assigned a residency mode of ANY. If you specify an ORIGIN address less than 16MB, the program is assigned a residency mode of 24.