$XABALL

   The $XABALL macro allocates and initializes a XABALL, which
   allows extended control of file disk space allocation, both for
   initial allocation and later extension. No value is returned for
   this assembly-time operation.

   Format

     $XABALL  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=<f(1), f(2), f(3)>,

              VOL=volume-number