I thought that Joe J's braille terminal had a USB connection. That meant that I could have tested it with my XO, provided that I got some Linux screen-reading software on the XO.
No such luck. It needs either a parallel port or a serial port, neither of which is available on the XO. Phooey.
Time to look around online and see if there are USB adapters for parallel or serial ports.
Darn darn darn darn darn...!