Re: MVS under VM\ESA

--- In [email protected], Ivan Warren <ivan@...> wrote:
>
> kerravon86 wrote:
> > 
> > And also, how does VM/ESA or P/390 manage to cope
> > with MVS 3.8j doing old-style I/O, or 370 DAT?
> > Do they support S/370 mode?  If so, why the
> > requirement for a change in CR0 or whatever?
> 
> SIE 

I looked up SIE in the index of the ESA POPS,
but didn't see anything.

http://publib.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/DZ9AR006/INDEX?DT=19990630131355

I guess it's to do with single instruction
execution. What's that got to do with 2K
vs 4K pages that Dave mentioned?

And surely pretending to protect 4K pages
when you're only protecting 2K is going to
have an adverse effect on something?

> my (not talking to me) friend.. SIE

Pardon? Who isn't talking to who?

BFN.  Paul.