all You might want to know about MVS and DFSMS macros
usage, parameters, return codes, register used
can be easily be found here....
MVS
z/OS V1R10.0 MVS Programming Assembler Services Guide
http://publibz.boulder.ibm.com/cgi-bin/ ... 0523015946
z/OS V1R10.0 MVS Programming Assembler Services Reference Vol 1 (ABEND-HSPSERV)
http://publibz.boulder.ibm.com/cgi-bin/ ... 0522045539
z/OS V1R10.0 MVS Programming Assembler Services Reference Vol 2 (IARR2V-XCTLX)
http://publibz.boulder.ibm.com/cgi-bin/ ... 0601235844
DFSMS
z/OS V1R10.0 DFSMS Using Data Sets
http://publibz.boulder.ibm.com/cgi-bin/ ... 0602122917
z/OS V1R10.0 DFSMS Macro Instructions for Data Sets
http://publibz.boulder.ibm.com/cgi-bin/ ... 0122165044
not the latest onrs but more than enough for Your needs