IGBDCSX1 and IGBDCSX2 Parameter List

Register 1 contains an address of a 4-byte field that has the address of the DCS pre- and postcalculation exit parameter list. The IGBDCSIE macro maps the parameter list, shown in Table 1. For PDSEs and extended format data sets the block size is simulated and DASD calculation service returns device-independent larger values.

Table 1. IGBDCSX1/IGBDCSX2 Parameter List
Offset	Length or Bit Pattern	Name	Description
00 (X'00')		DCSIEPL	DCS installation exit parameter list
00 (X'00')	44	DCSIEDSN	Data set name
44 (X'2C')	2	DCSIEDSO	Data set organization (only physical sequential, partitioned and VSAM should come to this exit). The unmovable bit might be on if not SMS-managed.
	X'8000'	DCSIEIS	Indexed sequential organization
	X'4000'	DCSIEPS	Physical sequential organization, standard or extended format, possibly compressed.
	X'2000'	DCSIEDA	Direct organization (BDAM)
	X'1000'	DCSIECX	BTAM or QTAM line group
	X'0200'	DCSIEPO	Partitioned organization (partitioned data set or PDSE)
	X'1011'	DCSIEU	U-unmovable. The data contains location-dependent information. This bit can be on for all data set organizations except VSAM.
	X'0080'	DCSIEGS	Graphics organization
	X'0008'	DCSIEAM	VSAM data set
46 (X'2E')	2		Reserved
48 (X'30')	4	DCSIEKP	Key position
52 (X'34')	4	DCSIELRL	Logical record length (average record length if VSAM)
56 (X'38')	4	DCSIETC	Track capacity
60 (X'3C')	4	DCSIEBUF	Buffer space
64 (X'40')	4	DCSIESTG	Exit workspace address
68 (X'44')	2	DCSIEKL	Key length
70 (X'46')	2	DCSIEBS	Block size (current physical block size if VSAM)
72 (X'48')	2	DCSIECOB	Calculated optimum block size
74 (X'4A')	6	DCSIEVSN	Volume serial number, if available, or blanks