Ancient 8086/80286 unixes?

[Fred Cisin]

> > I wonder if there were any 80286 coprocessor plug-in boards for the
> > XT before the AT?

On Wed, 5 Sep 2007, Tony Duell wrote:
> half-length ISA card containing an 80286, 80287 and glue logic, with a
> ribbon cable ending in a 40 pin DIL plug that presumanly goes in the 8088
> socket on the PC/XT motherboard.
>
> I also have an 8086 board for the XT. Of course the benefit of that

ISA:
80386  "Elevator"?
Z80