The same functionality as most all other aperture priority capable cameras of the era with the typical two manual speeds - sync (1/100) and bulb, when battery is dead. This is just like Nikon's top pro aperture priority interchangeable viewfinder SLR - the F3.
Originally Posted by John Koehrer
John No! Battery dependency and no motor drive (I know there is a version with built in motor drive) were the reasons the XK was sold well compared to Nikon F2 or Canon F1.