>There was a discussion some time ago (see http://mail-index.netbsd.org for
>archives), if I remember properly the conclusion was that most i960-based
>systems availanle didn't have an MMU, and so were unusable for an Unix-like
>system.

What exactly is the function of an MMU and can it be emulated in software?

I have a 16bit processor I want to port unix to.

Grant