Genius screen driver for Xenix

[cctal!andrew at relay.eu.net]

Can anyone point me in the right direction for a screen driver that
will allow me to use a Genius full screen monitor under Xenix 386?
I don't (necessarily) want X-window stuff; I would just like to be able 
to have 66 lines or whatever character terminal, not just the top one 
third of the screen.
Thanks
Andrew Hardie
London, England
andrew at cctal.uucp