Marcio,

You wrote "Unhappyly fdc has that to be commercial".

What exactly do you mean? Does it have to be a currently shipping part (there aren't many and they are mostly part of larger PC I/O multi-function silicon). Or does your prof. mean that it need be compatible with FAT12 PC format? Or does he mean something completely different?

we have discussed floppy interfaces before so give a search a try.

regards,
p