Still no luck with the Baum display, but at least NVDA isn't crashing anymore. The display says "Baum V:005 19.03.98", then offers 4 modes. I can choose from Baum, Emul. 2, Emul. 3, or Emul. 4. None work with NVDA or Narrator. I even changed my serial to USB adapter's rate to 19200 instead of 9600, but this did nothing. The display uses a 2x5 header, so I got an adapter to go from that to serial. TMK there's only the one kind of adapter. I'm stuck. I'm not sure what else to try. I'm so close!