Hi all. Not having ever gotten any docs for my powerbraille 80, I'm curious about the serial ports and things on the back. Obviously I have 1 going to the pc for brltty, and on the pc, I have another for speech. Can you, for instance, use the other serial on the powerbraille for something else? Like plugging in a braille lite for use with minicom? How is this powerbraille extra serial port addressed? Thanks much.