I just got a Model M5-2 from ebay... it is in amazing condition and the keys feel like they've never been typed on. I've been wanting a trackball because of limited desk space.
Anyhow the keyboard part works fine over PS/2 cable, but the trackball does not work great at all. When I hook it up to an active PS/2 converter it will work for a few seconds, but then not at all. I think the trackball controller in the keyboard must not be very tolerant of any strangeness, because if I hook a regular PS/2 mouse up to the converter it works fine.
Does you guys know of a PS/2 to USB converter that would be compatible?
(also the trackball squeaks a lot when it is moved... is there some kind of lubricant I can use to alleviate that?)
