Hi Kris,
I don't own a braille display, but I know a little about USB to serial
converters.
First, not all USB to serial converters are the same. You might have to try
a few before you can find one that will work, but I'm pretty sure that there
is a converter out there that will work. If jaws 12 won't support your
display, just stick with an earlier version of jaws.
Bob Tinney, K8LR, [log in to unmask]