Your program can invoke DAIR by using the CALLTSSR macro instruction, specifying IKJDAIR as the entry point name. However, you must first create the DAIR parameter list (DAPL) and place its address into register 1. The DAPL is described in The DAIR Parameter List (DAPL).

The DAIR service routine can be invoked in either 24- or 31-bit addressing mode. The caller's parameters must be in the primary address space. When invoked in 31-bit addressing mode, DAIR can be passed input above 16 MB in virtual storage.