That would be an NCR Tower, they were indeed UNIX workstation & servers.. but I can't find a great deal of information.
From what I can piece together, they created these UNIX systems for use primarily as database servers.
It appears that they ran TMX, or NCR's own Unix based on AT&T SVR3.
http://en.wikipedia.org/wiki/Transac...ment_eXecutive
I did find these emails to the NetBSD mailing list, unfortunately it would appear that no port to this system exists yet.. the CPU (..m68k) is supported, but the rest of the systems hardware may be completely undocumented and NCR proprietary.
http://mail-index.netbsd.org/port-m6...5/06/0000.html
http://mail-index.netbsd.org/port-m6...5/06/0001.html
Hope that helps