"Perry E. Metzger" <perry@piermont.com> wrote;

> > The introduction of "supervisor mode" was a mystery.   Someone will disclose
> > the (real) story behind it.
> 
> It was introduced to try to get DEC to adopt it for its new machines,
> I thought, since VMS needed it.

I'm skeptic it because VAX does not have it.
The story I was told was another company demanded the additional to implement
the new OS.

Toru Nishimura/ALKYL Technology