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+xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix
+Version 6 (v6).  xv6 loosely follows the structure and style of v6,
+but is implemented for a modern x86-based multiprocessor using ANSI C.
+
+ACKNOWLEDGMENTS
+
+xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer
+to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14,
+2000)). See also http://pdos.csail.mit.edu/6.828/2012/v6.html, which
+provides pointers to on-line resources for v6.
+
+xv6 borrows code from the following sources:
+    JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, console.c, and others)
+    Plan 9 (entryother.S, mp.h, mp.c, lapic.c)
+    FreeBSD (ioapic.c)
+    NetBSD (console.c)
+
+The following people have made contributions:
+    Russ Cox (context switching, locking)
+    Cliff Frey (MP)
+    Xiao Yu (MP)
+    Nickolai Zeldovich
+    Austin Clements
+
+In addition, we are grateful for the patches contributed by Greg
+Price, Yandong Mao, and Hitoshi Mitake.
+
+The code in the files that constitute xv6 is
+Copyright 2006-2012 Frans Kaashoek, Robert Morris, and Russ Cox.
+
+ERROR REPORTS
+
+If you spot errors or have suggestions for improvement, please send
+email to Frans Kaashoek and Robert Morris (kaashoek,rtm@csail.mit.edu). 
+
+BUILDING AND RUNNING XV6
+
+To build xv6 on an x86 ELF machine (like Linux or FreeBSD), run "make".
+On non-x86 or non-ELF machines (like OS X, even on x86), you will
+need to install a cross-compiler gcc suite capable of producing x86 ELF
+binaries.  See http://pdos.csail.mit.edu/6.828/2012/tools.html.
+Then run "make TOOLPREFIX=i386-jos-elf-".
+
+To run xv6, you can use the Bochs or QEMU PC simulators. Bochs makes
+debugging easier, but QEMU is much faster. To run in Bochs, run "make
+bochs" and then type "c" at the bochs prompt. To run in QEMU, run
+"make qemu".
+
+To create a typeset version of the code, run "make xv6.pdf".  This
+requires the "mpage" utility.  See http://www.mesa.nl/pub/mpage/.