Tektronix XD88 Unix box - help/info needed

Hi all, I was given a Tektronix XD88/10 machine a few years ago that has sadly been sitting around gathering dust in the hope that I'd be able to find sufficient info/parts to fix it at some point - maybe someone on this list can help... When I got the machine I just had the main unit, and (amazingly, seeing how only a few of these seem to ever have been built) got hold of a keyboard for it. I haven't got the original monitor, but a Sun 16" display seems to work well enough. The disk was on its way out when I got hold of the machine, and from what I remember wouldn't even boot to single user mode last time I tried it. It's a 300MB Imprimis (Seagate) SCSI-1, so finding an exact or similar replacement shouldn't be too much trouble. The problem is the OS software - I don't have the tapes, and Tektronix stopped supporting the XD88's a few years ago (I heard from one guy in Australia who got an XD88 from a sale without OS, and Tektronix Aus. gave him the tapes for free which was rather nice - they took the line that they should be part of the machine anyway!) Second problem is mouse - the keyboard has a 9-pin *female* port on it for a mouse - anyone know pin-outs, what protocol was needed etc? Other than those two minor details, it works fine :) When I first got it it did boot to some sort of semi-working state; I seem to remember that the ethernet was working on it (I never tried the tape drive, I have a spare in case the one in it is broken though) Thanks for any help though, about time I got this thing going again!!! (Could still be a useful machine actually, it's got 16MB of main memory on it and 2MB for graphics memory) cheers, Jules