I have the following macro lying around which I presume I wrote to solve this problem. I leave whether it is correct or not as an exercise for the reader (as it appears I never used it).
MACRO
&LABEL ALIGN &BOUNDARY,&OFFSET
ORG *+&BOUNDARY-&OFFSET,&BOUNDARY,&OFFSET-&BOUNDARY
&LABEL DS 0X
MEND
Jonathan Scott
IBM Hursley, UK
