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Pintos, including its documentation, is subject to the following
license:
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    Copyright (C) 2004, 2005, 2006 Board of Trustees, Leland Stanford
    Jr. University.  All rights reserved.
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    Permission is hereby granted, free of charge, to any person obtaining
    a copy of this software and associated documentation files (the
    "Software"), to deal in the Software without restriction, including
    without limitation the rights to use, copy, modify, merge, publish,
    distribute, sublicense, and/or sell copies of the Software, and to
    permit persons to whom the Software is furnished to do so, subject to
    the following conditions:

    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

A few individual files in Pintos were originally derived from other
projects, but they have been extensively modified for use in Pintos.
The original code falls under the original license, and modifications
for Pintos are additionally covered by the Pintos license above. 

In particular, code derived from Nachos is subject to the following
license:
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/* Copyright (c) 1992-1996 The Regents of the University of California.
   All rights reserved.

   Permission to use, copy, modify, and distribute this software
   and its documentation for any purpose, without fee, and
   without written agreement is hereby granted, provided that the
   above copyright notice and the following two paragraphs appear
   in all copies of this software.

   IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO
   ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
   CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE
   AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA
   HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

   THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
   BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
   PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
   MODIFICATIONS.
*/