Data sets

There are four required DD names for the Assembler compiler:

Assembler
DD	Description	Access Method	LRECL	BLKSIZE	RECFM
SYSADATA	A data set containing associated data output when the ADATA option is in effect. This is an output data set created by the build which can be a zFolder/zDataset using the data set prefix from the build.	QSAM	32756	SMS¹	VB
SYSIN	An input data set containing the source statements to be processed. This is an input data set which is normally a zFolder data set.	QSAM	80	SMS¹	FB
SYSLIN	A data set containing object module output normally for the linkage editor, loader, or binder. This is an output data set created by the build which can be a zFolder/zDataset using the data set prefix from the build.	QSAM	80²	SMS¹	FB
SYSPRINT	A data set containing the assembly listing. This is an output data set created by the build which can be a zFolder/zDataset using the data set prefix from the build.	QSAM	133	SMS¹	FBA

¹ The data set is allocated with BLKSIZE=0 allowing SMS to determine the optimal block size for the device.
² If you specify the OBJECT option the logical record length must be 80. If you specify the GOFF option the object module can be generated with either fixed-length records of 80 bytes, or variable-length records up to BLKSIZE of 32720. The default is 80, which can be overridden in the resource definition.