A little guidance - TI Xenix

I realize this is a little off-topic (last build was about 1987 or 88) but I have my self in a corner 8-) There are a couple of windows I could crawl thru if I HAD to. I have a pristene TI Xenix 386DX16 system. I have access to one account and - you guessed it - it ain't root! Nobody seems to remember the root password 8-( I can't believe that I can't break into this thing! I don't have the original disks (I haven't dug that far into ALL my docs) but it has a SCSI Tape drive and two 8 port serial adaptors and some *special* TI card. It has 2 140 MB MFM drives and I want to keep both the drivers for the multiport boards and the SCSI board. I think I can get it to run Linux but I *really* don't want to blow away the Xenix. So - does any body know where I can find a way into Xenix? Are there any archives of CERT Advisories on glaring holes I can worm my way into editing the passwd file or something? I realize I could run CRACK but since that isn't what I normally do for FUN I was hoping the mass intellegence and huge experience in this list might be able to help 8-) All suggestions are welcome - except blowing it away. BC