I figured something out. I think my problems were mostly down to the
fact I was using a literal value as argument to the macro (e.g. "foo
6"). The assembler is not creating a new variable 'n' inside the macro,
it is just substituting the argument in place of 'n'. So, of course,
where there is "n = n - 2", this is turned in to "6 = 6 - 2", which
cannot be done!
If I assign a variable symbol first, then use that as argument to the
macro (e.g. "i = 6"; "foo i"), things work essentially as desired.
Regards,
Basil
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