REALLOC Parameter List

The parameter list for the DSECT form expansion is:

Table 1. REALLOC Parameter List
Offset	Length or Bit Pattern	Field Name	Description
0(X'00')		REALPL	DSECT name.
0(X'00')	4	RALPLID	EBCDIC "REAL" for "REALLOC"
4(X'04')	2	RALNGTH	Length of parameter list
6(X'06')	2	RAERRCDE	Error code from DADSM create
8(X'08')	1	RALFLAG	Flag byte
	1... ....	RALABS	0 means ALLOC=MOV. 1 means ALLOC=ABS.
	.1.. ....	RALVTOCE	VTOCENQD=YES
9(X'09')	1	RALPFLGS	Processing flag byte.
	1... ....	RALDUMMY	Dummy REALLOC parameter list is passed. Only the processing flag byte (byte 9), minimum allocation unit (bytes 16-19), and UCB address (bytes 24-27) are used. Ignore all other bytes and use the values in the JFCB or Partial DSCB interface as passed in register 0.
	.1.. ....	RALTRKAL	Space must be allocated from track-managed space.
	..1. ....	RALEXREQ	The exact amount of space must be allocated. Applicable to EAV. The request is to be allocated using a combination of the track-managed and/or the cylinder-managed spaces. If the exact space is not available, then the request is failed.
	...1 11..	*	Reserved.
	.... ..11	RALEATTR	The extended attribute (EATTR=) value to be used. Valid when RALDUMMY is set and when the JFCB is passed in register 0. If 0, EATTR has not been specified. For VSAM data sets, the default behavior is equivalent to EATTR=OPT. For non-VSAM data sets the default behavior is equivalent to EATTR=NO. If 1, EATTR=NO has been specified. The data set cannot have extended attributes (format 8 and 9 DSCBs) or optionally reside in EAS. If 2, EATTR=OPT has been specified. The data set can have extended attributes and optionally reside in EAS. This is the default behavior for VSAM data sets. If 3, Not Used, EATTR treated as not specified.
10(X'0A')	1	RALNUMF9	Number of contiguous partial format 9 DSCBs that are located at the address in bytes 32-35. The default is one.
11(X'0B')	1		Reserved
12(X'0C')	4	RALDSSZ	Data set size
16(X'10')	4	RALMAU	Minimum allocation unit
20(X'14')	4	RALPDSCB	Address of partial DSCB
24(X'18')	4	RALUCB	Address of UCB
28(X'1C')	4	RALDQTY	PDS directory quantity
32(X'20')	4	RAL2DSCB	Address of format 2 DSCB. Mutually exclusive with RAL9DSCB.
32(X'20')	4	RAL9DSCB	Contiguous partial format 9 DSCBs pointer. RALNUMF9 defines the number of partial format 9 DSCBs. Format 9 DSCBs with a subtype field with a value other than 1 are ignored. Only format 9 DSCB attribute data in this model will be used. Mutually exclusive with RAL2DSCB.
36(X'24')	4	RAL3DSCB	Address of format 3 DSCB
40(X'28')	0	RALEND	Byte after end of list
	40	RALENGTH	Symbolic length of parameter list