Instanciating dual port memory with different r/w widths

Inferencing rams is only garanteed to work for the code templates, and these will only work for arrays of normal types (like unsigned, std_logic_vector etc). I dont think you will get it to work with record types at all, unless you convert the records to single type arrays.

But you havent posted all of the code, just snippets, so I cannot see if the code is suitable for memory inference in the first place. The code has to follow a certain template before it will work - the ramstyle attribute only works when the templates are followed.