Ok henri, I have heard that in a web some pictures appeared explaining how to take out a parallel port connecting it to the pines of expansion of usb of the mainboard, but I have not still seen him, and I cannot confirm it, that that yes I have seen they are chips that make it, I will continue looking for since I also want to connect it to the port usb and at the moment the usb to parallel cables have some very high prices (350$ in a Spanish web of hardware sale), at least in my country.
Thank you for your work.