i960, or i860? I wasn't aware that any i960 Unix
boxes had been shipped.
The i960 family was the stripped-down commercial version of the ill-fated
Gemini (P7) 33-bit (not a typo!) processor, a collaboration between Intel
and Siemens. The two companies created a workstation company called BiiN
to sell the workstations, and although they shipped some prerelease
machines, AFAIK they never offered any for sale.
It also grew from the 8089 (20 bit) and the 8751(8bit) for embedded
tasks like engine controls.