I think there are no drivers present for that device, but I worte a HPGL to EB50
converter (long time ago). Although I developed it on a AMIGA plattform, it could
be compiled on a PC. Unfortunately it works only with a few HPGL commands in
that form the AMIGA plotter driver generates them. Perhaps someone would like
to improve it.
If you have lost the manual with the EB50 commands - I can help you.