The DAIR Parameter List (DAPL)

At entry to DAIR, register 1 must point to a DAIR parameter list that you have built. The addresses of the user profile table, environment control table, and protected step control block can be obtained from the Information Center Facility (CPPL) that the TMP passes to your Command Processor. Additional information on the address and creation of the user profile table, environment control table, and protected step control block is shown in Table 1.

You can use the IKJDAPL DSECT, which is provided in SYS1.MACLIB to map the fields in the DAPL. Table 1 shows the format of the DAPL.

Table 1. The DAIR parameter list (DAPL)
Offset dec(Hex)	Number of bytes	Field name	Contents or meaning
0(0)	4	DAPLUPT	The address of the user profile table.
4(4)	4	DAPLECT	The address of the environment control table.
8(8)	4	DAPLECB	The address of the calling program's event control block. The ECB is one word of real storage declared and initialized to zero by the calling routine.
12(C)	4	DAPLPSCB	The address of the protected step control block.
16(10)	4	DAPLDAPB	The address of the DAIR parameter block, created by the calling routine.