IFG0EX0B Parameter List

Register 1 contains the address of the DCB open installation exit parameter list. The IECOIEXL macro maps the parameter list, shown in Table 1.

Table 1. IFG0EX0B Parameter List. Mapped by IECOIEXL.
Offset	Length or Bit Pattern	Name	Description
00 (X'00')	0	OIEXL	DCB Open installation exit parameter list
00 (X'00')	1	OIEXOOPT	Open option (last four bits)
	.... 1111	OIEXOOUT	OUTPUT or EXTEND
	.... 0111	OIEXOOIN	OUTIN or OUTINX
	.... 0100	OIEXOUPD	UPDAT
	.... 0011	OIEXOINO	INOUT
	.... 0001	OIEXORDB	RDBACK
	.... 0000	OIEXOINP	INPUT
01 (X'01')	1	OIEXUKEY	User protection key (key of user DCB)
02 (X'02')	2	OIEXLTH	Length of open installation exit parameter list (OIEXL)
04 (X'04')	4	OIEXUDCB	Address of user DCB in user protection key (OIEXUKEY)
08 (X'08')	4	OIEXPDCB	Address of protected copy of DCB used by open
12 (X'0C')	4	OIEXJFCB	Address of JFCB
16 (X'10')	4	OIEXDSCB	Address of data portion of the format-1 or format-4 DSCB
20 (X'14')	4	OIEXTIOT	Address of TIOT entry
24 (X'18')	4	OIEXUCB	Address of UCB. Can be captured or actual below the 16MB line.