ARCSAEXT Parameter List for System-Managed Data Sets

Register 1 contains the address of the ARCSAEXT parameter list for system-managed data sets as shown in Table 1.

Table 1. ARCSAEXT Parameter List (System-Managed Data Sets)
Offset Length or Bit Pattern Description
00 (X'00') 4 The address of a 140-byte area containing the data set VTOC entry being processed.
If the data set VTOC entry cannot be found for an system-managed data set, the address of an area representing the data set VTOC entry is passed to the exit. The following fields are the only ones set in the pseudo data set VTOC entry:
  • Data set name (DS1DSNAM)
  • Format-1 identifier (DS1FMTID)
  • SMS indicator (DS1SMSDS)
  • VSAM indicator (DS1ORGAM)
04 (X'04') 4 The address of a 6-byte area containing the volume serial number being processed.
08 (X'08') 4 The address of a data set and processing information area, containing information described in ARCSAEXT—Data Set and Processing Information Area.
12 (X'0C') 4 The address of a fullword binary return code field. See ARCSAEXT Return Codes.
Parent topic: Characteristics of the ARCSAEXT Exit