If I'm not mistaken I believe it does. Anyway, if so then it might even use fewer cpu cylces than usb or at the very least not enough more to make any noticeable difference. I tend to agree here with ...
This is just a general question. I know, obviously, that there are RS-232 "serial ports" and IEEE 1284/Centronix ports "parallel ports," and that these are "digital" connections. Then you have things ...