Sorry 'bout that - i didn't look at which section of the forum you had posted your question
See if this is more what you are looking for:
Use the S-type address constant to assemble an explicit address in base-displacement form. You can specify the explicit address yourself or let the assembler compute it from an implicit address, using the current base register and address in its computation.
The quote is from the assembler language reference section on address constants:http://publib.boulder.ibm.com/infocente ... 010182.htm