At 13:19 +0200 on 08/15/2013, John P. Hrtmann wrote about Making an old macro baseless:
I guess there is the additional wrinkle that the target must be on a halfword boundary, but I can add a trailing blank to a literal that is an odd number of characters (as long as I don't mess up the length).
Or just code it as =clx'..." where x is the length (if even) or length+1 (if the length is odd).
