You could just try to get a copy of Multics to port 
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Walter Oney
Sent: Monday, December 23, 2002 3:06 PM
To: NT Developers Interest List
Subject: [ntdev] Re: Sitting under the OS
“David J. Craig” wrote:
Good idea, though, but can you get everyone to buy in? Microsoft
would have to change some of the basic architecture of Windows NT to
support more than two rings, but I guess they decided to keep it at
two so more processors would be compatible.
There’s probably a performance issue with multiple rings, too. Each
ring-crossing interrupt and IRETD takes a large number of cycles.
Multiplying the ring transitions by layering the system would probably
slow it way down. I have to admit, though, that I always wanted to write
an OS that used call gates and all the other cool stuff that Intel built
into the architecture.
–
Walter Oney, Consulting and Training
Basic and Advanced Driver Programming Seminars
Now teaming with John Hyde for USB Device Engineering Seminars Check out
our schedule at http://www.oneysoft.com
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