Addressing mode

Existing object modules and programs that were assembled using the old generation mode (corresponds to PARMOD=24) are still executable, but only in the 24-bit address space, i.e. addressing is 24-bit-dependent.

Programs assembled using the new generation mode for 31-bit addressing are executable in both 24-bit and 31-bit addressing mode, i.e. they are “addressing-mode-independent”.

Here too, it is possible for one file to be processed in 24-bit addressing mode and another in 31-bit addressing mode in the same program, or even for a mix of both modes to be used. Note, however, that the addressing mode applicable to the FCB must be set before issuing a DMS macro.