The $XABALL_STORE macro moves user-specified values into fields
    of the specified XABALL. The expanded $XABALL_STORE code executes
    at run time on a previously initialized (allocated) XABALL, in
    contrast to the $XABALL macro, which initializes a XABALL at
    assembly time. The $XABALL_STORE macro must reside in a code
    program section.

    Format

      $XABALL_STORE  XAB=xaball-address,

                     AID=#area-identification-number,

                     ALN={ANY|CYL|LBN|RFI|VBN},

                     ALQ=#allocation-quantity,

                     AOP=<CBT CTG HRD ONC>,

                     BKZ=#bucket-size,

                     DEQ=#extension-quantity,

                     LOC=#location-number,

                     NXT=next-xab-address,

                     RFI=#related-file-identification,

                     VOL=#volume-number