Francesco Loconte was asking about the controller chip pinouts for a
floppy drive.  I have no knowledge, but have found this web site about
using the stepper motors (in &) out of floppy drives.  There is a card
edge connector pinout and (I believe) some code for driving them.  Try:

        http://www.doc.ic.ac.uk/~ih/doc/stepper/

I hope that it helps.

Michael

When the way of the Tao is forgotten, kindness and ethics must be taught.
Men must learn to pretend to be wise and good.  --  Lao Tzu