Re: port-xen/53267 (XEN amd64 DomU (Dom0??) NetBSD current USERMODE() fails)

[Robert Elz <kre%munnari.OZ.AU@localhost>]

The following reply was made to PR port-xen/53267; it has been noted by GNATS.

From: Robert Elz <kre%munnari.OZ.AU@localhost>
To: John Nemeth <jnemeth%cue.bc.ca@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: port-xen/53267 (XEN amd64 DomU (Dom0??) NetBSD current USERMODE() fails)
Date: Sun, 13 May 2018 23:57:53 +0700

     Date:        Sat, 12 May 2018 00:36:25 -0700
     From:        John Nemeth <jnemeth%cue.bc.ca@localhost>
     Message-ID:  <201805120736.w4C7aP9t028295%server.cornerstoneservice.ca@localhost>
 
 Thanks for taking the trouble to explain all of that.
 
 In particular:
 
   |      AMD noted that rings 1 and 2 weren't used much and dumped them
   | as unused legacy stuff. 
 
 which explains a lot - I had wondered why they were not used.
 
 kre
 
 ps: I still think the 8080 was the worst of the competing 8 bit processors
 of the time, and while I applaud Intel's capacity to extend it while more
 or less keeping complete compat with ancient code, I really wish that IBM
 had selected one of the other choices...