>> You don't want inline data values that you branch around. They are
>> cache-killers.

For certain types it does not realy matter (i.e. OPEN or CLOSE), but if
that is a concern I would go to MF=L and MF=E - That is a convention in
use since ages. 

>> ... especially if your ARCH does not support EXR.

I never had readability concerns/complains about this

      EX  R4,=S(&MVC,TARGET,SOURCE)

with appropriate EQUs at the beginning of the code.

Well; almost never. Exception was at some point in the late
90ties, someone at IBM-HLASM group decided to spit out an e-level
error, which can be overruled. 

-- 
Martin

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