Merge commit 'a074364c3731d66b56d988c8a6c960a83ea0e0a1' as 'tmk_core'

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diff --git a/tmk_core/doc/COPYING.GPLv2 b/tmk_core/doc/COPYING.GPLv2
new file mode 100644
index 000000000..d159169d1
--- /dev/null
+++ b/tmk_core/doc/COPYING.GPLv2
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/tmk_core/doc/COPYING.GPLv3 b/tmk_core/doc/COPYING.GPLv3
new file mode 100644
index 000000000..94a9ed024
--- /dev/null
+++ b/tmk_core/doc/COPYING.GPLv3
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
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+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
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+the work, and the source code for shared libraries and dynamically
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+subprograms and other parts of the work.
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+can regenerate automatically from other parts of the Corresponding
+Source.
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+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
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+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
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+  No covered work shall be deemed part of an effective technological
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+  When you convey a covered work, you waive any legal power to forbid
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+modification of the work as a means of enforcing, against the work's
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+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
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+  5. Conveying Modified Source Versions.
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+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
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+    work need not make them do so.
+
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diff --git a/tmk_core/doc/FUSE.txt b/tmk_core/doc/FUSE.txt
new file mode 100644
index 000000000..40055e5ab
--- /dev/null
+++ b/tmk_core/doc/FUSE.txt
@@ -0,0 +1,40 @@
+ATMega168P Fuse/Lock Bits
+=========================
+This configuration is from usbasploader's Makefile.
+
+    HFUSE   0xD6
+    LFUSE   0xDF
+    EFUSE   0x00
+    LOCK    0x3F(intact)
+
+#---------------------------------------------------------------------
+# ATMega168P
+#---------------------------------------------------------------------
+# Fuse extended byte:
+# 0x00 = 0 0 0 0   0 0 0 0 <-- BOOTRST (boot reset vector at 0x1800)
+#                    \+/
+#                     +------- BOOTSZ (00 = 2k bytes)
+# Fuse high byte:
+# 0xd6 = 1 1 0 1   0 1 1 0
+#        ^ ^ ^ ^   ^ \-+-/
+#        | | | |   |   +------ BODLEVEL 0..2 (110 = 1.8 V)
+#        | | | |   + --------- EESAVE (preserve EEPROM over chip erase)
+#        | | | +-------------- WDTON (if 0: watchdog always on)
+#        | | +---------------- SPIEN (allow serial programming)
+#        | +------------------ DWEN (debug wire enable)
+#        +-------------------- RSTDISBL (reset pin is enabled)
+# Fuse low byte:
+# 0xdf = 1 1 0 1   1 1 1 1
+#        ^ ^ \ /   \--+--/
+#        | |  |       +------- CKSEL 3..0 (external >8M crystal)
+#        | |  +--------------- SUT 1..0 (crystal osc, BOD enabled)
+#        | +------------------ CKOUT (if 0: Clock output enabled)
+#        +-------------------- CKDIV8 (if 0: divide by 8)
+
+
+# Lock Bits
+# 0x3f = - - 1 1   1 1 1 1
+#            \ /   \-/ \-/
+#             |     |   +----- LB 2..1 (No memory lock features enabled)
+#             |     +--------- BLB0 2..1 (No restrictions for SPM or LPM accessing the Application section)
+#             +--------------- BLB1 2..1 (No restrictions for SPM or LPM accessing the Boot Loader section)
diff --git a/tmk_core/doc/POWER.txt b/tmk_core/doc/POWER.txt
new file mode 100644
index 000000000..0abbbe48e
--- /dev/null
+++ b/tmk_core/doc/POWER.txt
@@ -0,0 +1,62 @@
+Time to Sleep
+=============
+USB suspend     no activity on USB line for  3ms
+No Interaction  no user interaction
+    matrix has no change
+    matrix has no switch on
+
+
+AVR Power Management
+====================
+
+V-USB suspend
+    USB suspend
+    http://vusb.wikidot.com/examples
+
+MCUSR   MCU Status Register
+    WDRF    Watchdog Reset Flag
+    BORF
+    EXTRF
+    PORF    Power-on Reset Flag
+
+SMCR    Sleep Mode Control Register
+    SE      Sleep Enable
+    SM2:0   
+        #define set_sleep_mode(mode) \
+        #define SLEEP_MODE_IDLE         (0)
+        #define SLEEP_MODE_ADC          _BV(SM0)
+        #define SLEEP_MODE_PWR_DOWN     _BV(SM1)
+        #define SLEEP_MODE_PWR_SAVE     (_BV(SM0) | _BV(SM1))
+        #define SLEEP_MODE_STANDBY      (_BV(SM1) | _BV(SM2))
+        #define SLEEP_MODE_EXT_STANDBY  (_BV(SM0) | _BV(SM1) | _BV(SM2))
+
+
+ACSR    Analog Comparator Control and Status Register
+    To disable Analog Comparator
+    ACSR = 0x80;
+    or
+    ACSR &= ~_BV(ACIE);
+    ACSR |= _BV(ACD);
+
+    ACD: Analog Comparator Disable
+        When this bit is written logic one, the power to the Analog Comparator is
+        switched off. This bit can be set at any time to turn off the Analog
+        Comparator. This will reduce power consumption in Active and Idle mode.
+        When changing the ACD bit, the Analog Comparator Interrupt must be disabled
+        by clearing the ACIE bit in ACSR. Otherwise an interrupt can occur when
+        the bit is changed.
+
+DIDR1   Digital Input Disable Register 1
+    AIN1D
+    AIN0D
+        When this bit is written logic one, the digital input buffer on the AIN1/0 pin is disabled. The corresponding PIN Register bit will always read as zero when this bit is set. When an analog signal is applied to the AIN1/0 pin and the digital input from this pin is not needed, this bit should be written logic one to reduce power consumption in the digital input buffer.
+
+
+PRR     Power Reduction Register
+    PRTWI
+    PRTIM2
+    PRTIM0
+    PRTIM1
+    PRSPI
+    PRUSART0
+    PRADC
diff --git a/tmk_core/doc/USB_NKRO.txt b/tmk_core/doc/USB_NKRO.txt
new file mode 100644
index 000000000..d9f1d1229
--- /dev/null
+++ b/tmk_core/doc/USB_NKRO.txt
@@ -0,0 +1,160 @@
+USB NKRO MEMO
+=============
+2010/12/09
+
+
+References
+----------
+USB - boot mode, NKRO, compatibility, etc...
+    http://geekhack.org/showthread.php?t=13162
+NKey Rollover - Overview, Testing Methodology, and Results
+    http://geekhack.org/showwiki.php?title=NKey+Rollover+-+Overview+Testing+Methodology+and+Results
+dfj's NKRO(2010/06)
+    http://geekhack.org/showpost.php?p=191195&postcount=251
+    http://geekhack.org/showthread.php?p=204389#post204389
+
+
+Terminology
+---------
+NKRO
+ghost
+matrix
+mechanical with diodes
+membrane
+
+
+OS Support Status
+-----------------
+USB NKRO is possible *without* a custom driver.
+At least following OS's supports.
+    Windows7 64bit
+    WindowsXP
+    Windows2000 SP4
+    Ubuntu10.4(Linux 2.6)
+    MacOSX(To be tested)
+
+
+Custom Driver for USB NKRO
+--------------------------
+NOT NEEDED
+at least when using following report formats on Windows, Linux or MacOSX.
+
+
+USB NKRO methods
+----------------
+1. Virtual keyboards
+    Keyboard can increase its KRO by using virtual keyboards with Standard or Extended report.
+    If the keyboard has 2 virtual keyboard with Standard report(6KRO), it gets 12KRO.
+    Using this method means the keyboard is a composite device.
+
+2. Extended report
+    It needs large report size for this method to achieve NKRO.
+    If a keyboard has 101keys, it needs 103byte report. It seems to be inefficient.
+
+3. Bitmap report
+    If the keyboard has less than 128keys, 16byte report will be enough for NKRO.
+    The 16byte report seems to be reasonable cost to get NKRO.
+
+
+Report Format
+-------------
+Other report formats than followings are possible, though these format are typical one.
+
+1. Standard             8bytes
+    modifiers(bitmap)       1byte
+    reserved                1byte(not used)
+    keys(array)             1byte*6
+Standard report can send 6keys plus 8modifiers simultaneously.
+Standard report is used by most keyboards in the marketplace.
+Standard report is identical to boot protocol report.
+Standard report is hard to suffer from compatibility problems.
+
+2. Extended standard    16,32,64bytes
+    modifiers(bitmap)       1byte
+    reserved                1byte(not used)
+    keys(array)             1byte*(14,32,62)
+Extended report can send N-keys by using N+2bytes.
+Extended report is expected to be compatible with boot protocol.
+
+3. Bitmap               16,32,64bytes
+    keys(bitmap)            (16,32)bytes
+Bitmap report can send at most 128keys by 16bytes and 256keys by 32bytes.
+Bitmap report can achieve USB NKRO efficiently in terms of report size.
+Bitmap report needs a deliberation for boot protocol implementation.
+Bitmap report descriptor sample:
+        0x05, 0x01,                     // Usage Page (Generic Desktop),
+        0x09, 0x06,                     // Usage (Keyboard),
+        0xA1, 0x01,                     // Collection (Application),
+        // bitmap of modifiers
+        0x75, 0x01,                     //   Report Size (1),
+        0x95, 0x08,                     //   Report Count (8),
+        0x05, 0x07,                     //   Usage Page (Key Codes),
+        0x19, 0xE0,                     //   Usage Minimum (224),
+        0x29, 0xE7,                     //   Usage Maximum (231),
+        0x15, 0x00,                     //   Logical Minimum (0),
+        0x25, 0x01,                     //   Logical Maximum (1),
+        0x81, 0x02,                     //   Input (Data, Variable, Absolute), ;Modifier byte
+        // LED output report
+        0x95, 0x05,                     //   Report Count (5),
+        0x75, 0x01,                     //   Report Size (1),
+        0x05, 0x08,                     //   Usage Page (LEDs),
+        0x19, 0x01,                     //   Usage Minimum (1),
+        0x29, 0x05,                     //   Usage Maximum (5),
+        0x91, 0x02,                     //   Output (Data, Variable, Absolute),
+        0x95, 0x01,                     //   Report Count (1),
+        0x75, 0x03,                     //   Report Size (3),
+        0x91, 0x03,                     //   Output (Constant),
+        // bitmap of keys
+        0x95, (REPORT_BYTES-1)*8,       //   Report Count (),
+        0x75, 0x01,                     //   Report Size (1),
+        0x15, 0x00,                     //   Logical Minimum (0),
+        0x25, 0x01,                     //   Logical Maximum(1),
+        0x05, 0x07,                     //   Usage Page (Key Codes),
+        0x19, 0x00,                     //   Usage Minimum (0),
+        0x29, (REPORT_BYTES-1)*8-1,     //   Usage Maximum (),
+        0x81, 0x02,                     //   Input (Data, Variable, Absolute),
+        0xc0                            // End Collection
+where REPORT_BYTES is a report size in bytes.
+
+
+Considerations
+--------------
+Compatibility
+    boot protocol
+    minor/old system
+        Some BIOS doesn't send SET_PROTOCOL request, a keyboard can't switch to boot protocol mode.
+        This may cause a problem on a keyboard which uses other report than Standard.
+Reactivity
+    USB polling time
+    OS/Driver processing time
+
+
+Windows Problem
+---------------
+1. Windows accepts only 6keys  in case of Standard report.
+        It should be able to send 6keys plus 8modifiers.
+2. Windows accepts only 10keys in case of 16bytes Extended report.
+        It should be able to send 14keys plus 8modifiers.
+3. Windows accepts only 18keys in case of 32bytes Extended report.
+        It should be able to send 30keys plus 8modifiers.
+If keys are pressed in excess of the number, wrong keys are registered on Windows.
+
+This problem will be reportedly fixed soon.(2010/12/05)
+    http://forums.anandtech.com/showpost.php?p=30873364&postcount=17
+
+
+Tools for testing NKRO
+----------------------
+Browser App:
+http://www.microsoft.com/appliedsciences/content/projects/KeyboardGhostingDemo.aspx
+http://random.xem.us/rollover.html
+
+Windows:
+AquaKeyTest.exe http://geekhack.org/showthread.php?t=6643
+
+Linux:
+xkeycaps
+xev
+showkeys
+
+EOF
diff --git a/tmk_core/doc/build.md b/tmk_core/doc/build.md
new file mode 100644
index 000000000..20702e94c
--- /dev/null
+++ b/tmk_core/doc/build.md
@@ -0,0 +1,186 @@
+Build Firmware and Program Controller
+=====================================
+
+
+Download and Install
+--------------------
+### 1. Install Tools
+
+1. **Toolchain** On Windows install [MHV AVR Tools][mhv] for AVR GCC compiler and [Cygwin][cygwin](or [MinGW][mingw]) for shell terminal. On Mac you can use [CrossPack][crosspack]. On Linux you can install AVR GCC with your favorite package manager.
+
+2. **Programmer** On Windows install [Atmel FLIP][flip]. On Mac and Linux install [dfu-programmer][dfu-prog].
+
+3. **Driver** On Windows you start DFU bootloader on the chip first time you will see 'Found New Hardware Wizard' to install driver. If you install device driver properly you can find chip name like 'ATmega32U4' under 'LibUSB-Win32 Devices' tree on 'Device Manager'. If not you shall need to update its driver on 'Device Manager'. You will find the driver in `FLIP` install directory like: C:\Program Files (x86)\Atmel\Flip 3.4.5\usb\. In case of `dfu-programmer` use its driver.
+
+If you use PJRC Teensy you don't need step 2 and 3 above, just get [Teensy loader][teensy-loader].
+
+
+### 2. Download source
+You can find firmware source at github:
+
+- <https://github.com/tmk/tmk_keyboard>
+
+If you are familiar with `Git` tools you are recommended to use it but you can also download zip archive from:
+
+- <https://github.com/tmk/tmk_keyboard/archive/master.zip>
+
+
+Build firmware
+--------------
+### 1. Open terminal
+Open terminal window to get access to commands. Use Cygwin(or MingGW) `shell terminal` in Windows or `Terminal.app` on Mac OSX. In Windows press `Windows` key and `R` then enter `cmd` in 'Run command' dialog showing up.
+
+### 2. Change directory
+Move to project directory in the firmware source.
+
+    cd tmk_keyboard/{'keyboard' or 'converter'}/<project>
+
+### 3. Make
+Build firmware using GNU `make` command. You'll see `<project>_<variant>.hex` file in that directory unless something unexpected occurs in build process.
+
+
+    make -f Makefile.<variant> clean
+    make -f Makefile.<variant>
+
+
+
+
+Program Controller
+------------------
+Now you have **hex** file to program on current directory. This **hex** is only needed to program your controller, other files are used for development and you may leave and forget them.
+
+### 1. Start bootloader
+How to program controller depends on controller chip and its board design. To program AVR USB chips you'll need to start it up in bootloader mode. Most of boards with the chip have a push button to let bootloader come up. Consult with your controller board manual.
+
+### 2. Program with DFU bootloader
+Stock AVR USB chip including ATmega32U4 has DFU bootloader by factory default. `FLIP` is a DFU programmer on Windows offered by Atmel. Open source command line tool `dfu-programmer` also supports AVR chips, it runs on Linux, Mac OSX and even Windows.
+
+To program AVR chip with DFU bootloader use `FLIP` or `dfu-programmer`.
+If you have a proper program command in `Makefile` just type this.
+
+`FLIP` has two version of tool, GUI app and command line program. If you want GUI see tutorial below.
+To use command line tool run this command. Note that you need to set PATH variable properly.
+
+    $ make -f Makefile.<variant> flip
+
+Or to program with `dfu-programmer` run:
+
+    $ make -f Makefile.<variant> dfu
+
+#### FLIP GUI tutorial
+1. On menu bar click Device -> Select, then. `ATmega32u4`.
+2. On menu bar click Settings -> Communication -> USB, then click 'Open' button on 'USB Port Connection' dialog.
+At this point you'll see grey-outed widgets on the app get colored and ready.
+
+3. On menu bar click File -> Load HEX File, then select your firmware hex file on File Selector dialog.
+4. On 'Operations Flow' panel click 'Run' button to load the firmware binary to the chip. Note that you should keep 'Erase', 'Blank Check', 'Program' and 'Verify' check boxes selected.
+5. Re-plug USB cord or click 'Start Application' button to restart your controller.
+Done.
+
+See also these instructions if you need.
+
+- <http://code.google.com/p/micropendous/wiki/LoadingFirmwareWithFLIP>
+- <http://www.atmel.com/Images/doc7769.pdf>
+
+
+### 3. Program with Teensy Loader
+If you have PJRC Teensy see instruction of `Teensy Loader`.
+
+- <http://www.pjrc.com/teensy/loader.html>
+
+Or use this command if you have command line version of Teensy Loader installed.
+
+    $ make -f Makefile.<variant> teensy
+
+
+### 4. Program with Other programmer
+You may want to use other programmer like `avrdude` with AVRISPmkII, Arduino or USBasp. In that case you can still use make target `program` for build with configuring `PROGRAM_CMD` in Makefile.
+
+    $ make -f Makefile.<variant> program
+
+
+[cygwin]:       https://www.cygwin.com/
+[mingw]:        http://www.mingw.org/
+[mhv]:          https://infernoembedded.com/products/avr-tools
+[winavr]:       http://winavr.sourceforge.net/
+[crosspack]:    http://www.obdev.at/products/crosspack/index.html
+[flip]:         http://www.atmel.com/tools/FLIP.aspx
+[dfu-prog]:     http://dfu-programmer.sourceforge.net/
+[teensy-loader]:http://www.pjrc.com/teensy/loader.html
+
+
+
+Makefile Options
+----------------
+### 1. MCU and Frequency.
+
+    MCU = atmega32u4       # Teensy 2.0
+    #MCU = at90usb1286      # Teensy++ 2.0
+    F_CPU = 16000000
+
+Set your MCU and its clock in Hz.
+
+    # Boot Section Size in *bytes*
+    #   Teensy halfKay   512
+    #   Atmel DFU loader 4096
+    #   LUFA bootloader  4096
+    OPT_DEFS += -DBOOTLOADER_SIZE=4096
+
+If you are using PJRC Teensy use `512` for `BOOTLOADER_SIZE`, otherwise use `4096` unless you are sure.
+
+### 2. Features
+Optional. Note that ***comment out*** with `#` to disable them.
+
+    BOOTMAGIC_ENABLE = yes      # Virtual DIP switch configuration(+1000)
+    MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
+    EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
+    CONSOLE_ENABLE = yes        # Console for debug(+400)
+    COMMAND_ENABLE = yes        # Commands for debug and configuration
+    SLEEP_LED_ENABLE = yes      # Breathing sleep LED during USB suspend
+    #NKRO_ENABLE = yes          # USB Nkey Rollover - not yet supported in LUFA
+    #BACKLIGHT_ENABLE = yes     # Enable keyboard backlight functionality
+
+### 3. Programmer
+Optional. Set proper command for your controller, bootloader and programmer. This command can be used with `make program`. Not needed if you use `FLIP`, `dfu-programmer` or `Teensy Loader`.
+
+    # avrdude with AVRISPmkII
+    PROGRAM_CMD = avrdude -p $(MCU) -c avrispmkII -P USB -U flash:w:$(TARGET).hex
+
+    # avrdude with USBaspLoader
+    PROGRAM_CMD = avrdude -p $(MCU) -c usbasp -U flash:w:$(TARGET).hex
+
+    # avrdude with arduino
+    PROGRAM_CMD = avrdude -p $(MCU) -c arduino -P COM1 -b 57600 -U flash:w:$(TARGET).hex
+
+
+
+Config.h Options
+----------------
+### 1. Magic command key combination
+
+    #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KB_LSHIFT) | MOD_BIT(KB_RSHIFT)))
+
+### 2. Mechanical Locking Support for CapsLock
+
+    /* Mechanical locking CapsLock support. Use KC_LCAP instead of KC_CAPS in keymap */
+    #define CAPSLOCK_LOCKING_ENABLE
+    /* Locking CapsLock re-synchronize hack */
+    #define CAPSLOCK_LOCKING_RESYNC_ENABLE
+
+### 3. Disable Debug and Print
+
+    /* disable debug print */
+    #define NO_DEBUG
+
+    /* disable print */
+    #define NO_PRINT
+
+### 4. Disable Action Features
+
+    #define NO_ACTION_LAYER
+    #define NO_ACTION_TAPPING
+    #define NO_ACTION_ONESHOT
+    #define NO_ACTION_MACRO
+    #define NO_ACTION_FUNCTION
+
+***TBD***
diff --git a/tmk_core/doc/keycode.txt b/tmk_core/doc/keycode.txt
new file mode 100644
index 000000000..760c726e3
--- /dev/null
+++ b/tmk_core/doc/keycode.txt
@@ -0,0 +1,261 @@
+Keycode Symbol Table
+====================
+Keycodes are defined in `common/keycode.h`.
+Range of 00-A4 and E0-E7 are identical with HID Usage:
+<http://www.usb.org/developers/devclass_docs/Hut1_11.pdf>
+Virtual keycodes are defined out of above range to support special actions.
+
+
+Keycode Symbol      Short name      Description
+--------------------------------------------------------------------------------
+KC_NO                               00 Reserved (no event indicated)
+KC_ROLL_OVER                        01 Keyboard ErrorRollOver
+KC_POST_FAIL                        02 Keyboard POSTFail
+KC_UNDEFINED                        03 Keyboard ErrorUndefined
+KC_A                                04 Keyboard a and A
+KC_B                                05 Keyboard b and B
+KC_C                                06 Keyboard c and C
+KC_D                                07 Keyboard d and D
+KC_E                                08 Keyboard e and E
+KC_F                                09 Keyboard f and F
+KC_G                                0A Keyboard g and G
+KC_H                                0B Keyboard h and H
+KC_I                                0C Keyboard i and I
+KC_J                                0D Keyboard j and J
+KC_K                                0E Keyboard k and K
+KC_L                                0F Keyboard l and L
+KC_M                                10 Keyboard m and M
+KC_N                                11 Keyboard n and N
+KC_O                                12 Keyboard o and O
+KC_P                                13 Keyboard p and P
+KC_Q                                14 Keyboard q and Q
+KC_R                                15 Keyboard r and R
+KC_S                                16 Keyboard s and S
+KC_T                                17 Keyboard t and T
+KC_U                                18 Keyboard u and U
+KC_V                                19 Keyboard v and V
+KC_W                                1A Keyboard w and W
+KC_X                                1B Keyboard x and X
+KC_Y                                1C Keyboard y and Y
+KC_Z                                1D Keyboard z and Z
+KC_1                                1E Keyboard 1 and !
+KC_2                                1F Keyboard 2 and @
+KC_3                                20 Keyboard 3 and #
+KC_4                                21 Keyboard 4 and $
+KC_5                                22 Keyboard 5 and %
+KC_6                                23 Keyboard 6 and ^
+KC_7                                24 Keyboard 7 and &
+KC_8                                25 Keyboard 8 and *
+KC_9                                26 Keyboard 9 and (
+KC_0                                27 Keyboard 0 and )
+KC_ENTER            KC_ENT          28 Keyboard Return (ENTER)
+KC_ESCAPE           KC_ESC          29 Keyboard ESCAPE
+KC_BSPACE           KC_BSPC         2A Keyboard DELETE (Backspace)
+KC_TAB                              2B Keyboard Tab
+KC_SPACE            KC_SPC          2C Keyboard Spacebar
+KC_MINUS            KC_MINS         2D Keyboard - and (underscore)
+KC_EQUAL            KC_EQL          2E Keyboard = and +
+KC_LBRACKET         KC_LBRC         2F Keyboard [ and {
+KC_RBRACKET         KC_RBRC         30 Keyboard ] and }
+KC_BSLASH           KC_BSLS         31 Keyboard \ and |
+KC_NONUS_HASH       KC_NUHS         32 Keyboard Non-US # and ~
+KC_SCOLON           KC_SCLN         33 Keyboard ; and :
+KC_QUOTE            KC_QUOT         34 Keyboard ‘ and “
+KC_GRAVE            KC_GRV          35 Keyboard Grave Accent and Tilde
+KC_COMMA            KC_COMM         36 Keyboard, and <
+KC_DOT                              37 Keyboard . and >
+KC_SLASH            KC_SLSH         38 Keyboard / and ?
+KC_CAPSLOCK         KC_CAPS         39 Keyboard Caps Lock
+KC_F1                               3A Keyboard F1
+KC_F2                               3B Keyboard F2
+KC_F3                               3C Keyboard F3
+KC_F4                               3D Keyboard F4
+KC_F5                               3E Keyboard F5
+KC_F6                               3F Keyboard F6
+KC_F7                               40 Keyboard F7
+KC_F8                               41 Keyboard F8
+KC_F9                               42 Keyboard F9
+KC_F10                              43 Keyboard F10
+KC_F11                              44 Keyboard F11
+KC_F12                              45 Keyboard F12
+KC_PSCREEN          KC_PSCR         46 Keyboard PrintScreen1
+KC_SCKLOCK          KC_SLCK         47 Keyboard Scroll Lock11
+KC_PAUSE            KC_PAUS         48 Keyboard Pause1
+KC_INSERT           KC_INS          49 Keyboard Insert1
+KC_HOME                             4A Keyboard Home1
+KC_PGUP                             4B Keyboard PageUp1
+KC_DELETE           KC_DELETE       4C Keyboard Delete Forward
+KC_END                              4D Keyboard End1
+KC_PGDOWN           KC_PGDN         4E Keyboard PageDown1
+KC_RIGHT            KC_RGHT         4F Keyboard RightArrow1
+KC_LEFT                             50 Keyboard LeftArrow1
+KC_DOWN                             51 Keyboard DownArrow1
+KC_UP                               52 Keyboard UpArrow1
+KC_NUMLOCK          KC_NLCK         53 Keypad Num Lock and Clear11
+KC_KP_SLASH         KC_PSLS         54 Keypad /1
+KC_KP_ASTERISK      KC_PAST         55 Keypad *
+KC_KP_MINUS         KC_PMNS         56 Keypad -
+KC_KP_PLUS          KC_PPLS         57 Keypad +
+KC_KP_ENTER         KC_PENT         58 Keypad ENTER5
+KC_KP_1             KC_P1           59 Keypad 1 and End
+KC_KP_2             KC_P2           5A Keypad 2 and Down Arrow
+KC_KP_3             KC_P3           5B Keypad 3 and PageDn
+KC_KP_4             KC_P4           5C Keypad 4 and Left Arrow
+KC_KP_5             KC_P5           5D Keypad 5
+KC_KP_6             KC_P6           5E Keypad 6 and Right Arrow
+KC_KP_7             KC_P7           5F Keypad 7 and Home
+KC_KP_8             KC_P8           60 Keypad 8 and Up Arrow
+KC_KP_9             KC_P9           61 Keypad 9 and PageUp
+KC_KP_0             KC_P0           62 Keypad 0 and Insert
+KC_KP_DOT           KC_PDOT         63 Keypad . and Delete
+KC_NONUS_BSLASH     KC_NUBS         64 Keyboard Non-US \ and |
+KC_APPLICATION      KC_APP          65 Keyboard Application10
+KC_POWER                            66 Keyboard Power9
+KC_KP_EQUAL         KC_PEQL         67 Keypad =
+KC_F13                              68 Keyboard F13
+KC_F14                              69 Keyboard F14
+KC_F15                              6A Keyboard F15
+KC_F16                              6B Keyboard F16
+KC_F17                              6C Keyboard F17
+KC_F18                              6D Keyboard F18
+KC_F19                              6E Keyboard F19
+KC_F20                              6F Keyboard F20
+KC_F21                              70 Keyboard F21
+KC_F22                              71 Keyboard F22
+KC_F23                              72 Keyboard F23
+KC_F24                              73 Keyboard F24
+KC_EXECUTE                          74 Keyboard Execute
+KC_HELP                             75 Keyboard Help
+KC_MENU                             76 Keyboard Menu
+KC_SELECT                           77 Keyboard Select
+KC_STOP                             78 Keyboard Stop
+KC_AGAIN                            79 Keyboard Again
+KC_UNDO                             7A Keyboard Undo
+KC_CUT                              7B Keyboard Cut
+KC_COPY                             7C Keyboard Copy
+KC_PASTE                            7D Keyboard Paste
+KC_FIND                             7E Keyboard Find
+KC__MUTE                            7F Keyboard Mute
+KC__VOLUP                           80 Keyboard Volume Up
+KC__VOLDOWN                         81 Keyboard Volume Down
+KC_LOCKING_CAPS                     82 Keyboard Locking Caps Lock12
+KC_LOCKING_NUM                      83 Keyboard Locking Num Lock12
+KC_LOCKING_SCROLL                   84 Keyboard Locking Scroll Lock12
+KC_KP_COMMA         KC_PCMM         85 Keypad Comma27
+KC_KP_EQUAL_AS400                   86 Keypad Equal Sign29
+KC_INT1             KC_RO           87 Keyboard International115,28
+KC_INT2             KC_KANA         88 Keyboard International216
+KC_INT3             KC_JYEN         89 Keyboard International317
+KC_INT4             KC_HENK         8A Keyboard International418
+KC_INT5             KC_MHEN         8B Keyboard International519
+KC_INT6                             8C Keyboard International620
+KC_INT7                             8D Keyboard International721
+KC_INT8                             8E Keyboard International822
+KC_INT9                             8F Keyboard International922
+KC_LANG1                            90 Keyboard LANG125
+KC_LANG2                            91 Keyboard LANG226
+KC_LANG3                            92 Keyboard LANG330
+KC_LANG4                            93 Keyboard LANG431
+KC_LANG5                            94 Keyboard LANG532
+KC_LANG6                            95 Keyboard LANG68
+KC_LANG7                            96 Keyboard LANG78
+KC_LANG8                            97 Keyboard LANG88
+KC_LANG9                            98 Keyboard LANG98
+KC_ALT_ERASE                        99 Keyboard Alternate Erase7
+KC_SYSREQ                           9A Keyboard SysReq/Attention1
+KC_CANCEL                           9B Keyboard Cancel
+KC_CLEAR                            9C Keyboard Clear
+KC_PRIOR                            9D Keyboard Prior
+KC_RETURN                           9E Keyboard Return
+KC_SEPARATOR                        9F Keyboard Separator
+KC_OUT                              A0 Keyboard Out
+KC_OPER                             A1 Keyboard Oper
+KC_CLEAR_AGAIN                      A2 Keyboard Clear/Again
+KC_CRSEL                            A3 Keyboard CrSel/Props
+KC_EXSEL                            A4 Keyboard ExSel
+/* Modifiers */
+KC_LCTRL            KC_LCTRL        E0 Keyboard LeftControl
+KC_LSHIFT           KC_LSFT         E1 Keyboard LeftShift
+KC_LALT                             E2 Keyboard LeftAlt
+KC_LGUI                             E3 Keyboard Left GUI(Windows/Apple/Meta key)
+KC_RCTRL            KC_RCTL         E4 Keyboard RightControl
+KC_RSHIFT           KC_RSFT         E5 Keyboard RightShift
+KC_RALT                             E6 Keyboard RightAlt
+KC_RGUI                             E7 Keyboard Right GUI(Windows/Apple/Meta key)
+
+/* 
+ * Virtual keycodes
+ */
+/* System Control */
+KC_SYSTEM_POWER     KC_PWR          System Power Down
+KC_SYSTEM_SLEEP     KC_SLEP         System Sleep
+KC_SYSTEM_WAKE      KC_WAKE         System Wake
+/* Consumer Page */
+KC_AUDIO_MUTE       KC_MUTE
+KC_AUDIO_VOL_UP     KC_VOLU
+KC_AUDIO_VOL_DOWN   KC_VOLD
+KC_MEDIA_NEXT_TRACK KC_MNXT
+KC_MEDIA_PREV_TRACK KC_MPRV
+KC_MEDIA_STOP       KC_MSTP
+KC_MEDIA_PLAY_PAUSE KC_MPLY
+KC_MEDIA_SELECT     KC_MSEL
+KC_MAIL             KC_MAIL
+KC_CALCULATOR       KC_CALC
+KC_MY_COMPUTER      KC_MYCM
+KC_WWW_SEARCH       KC_WSCH
+KC_WWW_HOME         KC_WHOM
+KC_WWW_BACK         KC_WBAK
+KC_WWW_FORWARD      KC_WFWD
+KC_WWW_STOP         KC_WSTP
+KC_WWW_REFRESH      KC_WREF
+KC_WWW_FAVORITES    KC_WFAV
+/* Mousekey */
+KC_MS_UP            KC_MS_U         Mouse Cursor Up
+KC_MS_DOWN          KC_MS_D         Mouse Cursor Down
+KC_MS_LEFT          KC_MS_L         Mouse Cursor Left
+KC_MS_RIGHT         KC_MS_R         Mouse Cursor Right
+KC_MS_BTN1          KC_BTN1         Mouse Button 1
+KC_MS_BTN2          KC_BTN2         Mouse Button 2
+KC_MS_BTN3          KC_BTN3         Mouse Button 3
+KC_MS_BTN4          KC_BTN4         Mouse Button 4
+KC_MS_BTN5          KC_BTN5         Mouse Button 5
+KC_MS_WH_UP         KC_WH_U         Mouse Wheel Up
+KC_MS_WH_DOWN       KC_WH_D         Mouse Wheel Down
+KC_MS_WH_LEFT       KC_WH_L         Mouse Wheel Left
+KC_MS_WH_RIGHT      KC_WH_R         Mouse Wheel Right
+KC_MS_ACCEL0        KC_ACL0         Mouse Acceleration 0
+KC_MS_ACCEL1        KC_ACL1         Mouse Acceleration 1
+KC_MS_ACCEL2        KC_ACL2         Mouse Acceleration 2
+/* Fn key */
+KC_FN0
+KC_FN1
+KC_FN2
+KC_FN3
+KC_FN4
+KC_FN5
+KC_FN6
+KC_FN7
+KC_FN8
+KC_FN9
+KC_FN10
+KC_FN11
+KC_FN12
+KC_FN13
+KC_FN14
+KC_FN15
+KC_FN16
+KC_FN17
+KC_FN18
+KC_FN19
+KC_FN20
+KC_FN21
+KC_FN22
+KC_FN23
+KC_FN24
+KC_FN25
+KC_FN26
+KC_FN27
+KC_FN28
+KC_FN29
+KC_FN30
+KC_FN31
diff --git a/tmk_core/doc/keymap.md b/tmk_core/doc/keymap.md
new file mode 100644
index 000000000..9d986a8c5
--- /dev/null
+++ b/tmk_core/doc/keymap.md
@@ -0,0 +1,593 @@
+Keymap framework - how to define your keymap
+============================================
+***NOTE: This is not final version, may be inconsistent with source code and changed occasionally for a while.***
+
+## 0. Keymap and layers
+**Keymap** is comprised of multiple layers of key layout, you can define **32 layers** at most.
+**Layer** is an array of **keycodes** to define **actions** for each physical keys.
+respective layers can be validated simultaneously. Layers are indexed with 0 to 31 and higher layer has precedence.
+
+    Keymap: 32 Layers                   Layer: Keycode matrix
+    -----------------                   ---------------------
+    stack of layers                     array_of_keycode[row][column]
+           ____________ precedence               _______________________
+          /           / | high                  / ESC / F1  / F2  / F3   ....
+      31 /___________// |                      /-----/-----/-----/-----
+      30 /___________// |                     / TAB /  Q  /  W  /  E   ....
+      29 /___________/  |                    /-----/-----/-----/-----
+       :   _:_:_:_:_:__ |               :   /LCtrl/  A  /  S  /  D   ....
+       :  / : : : : : / |               :  /  :     :     :     :
+       2 /___________// |               2 `--------------------------
+       1 /___________// |               1 `--------------------------
+       0 /___________/  V low           0 `--------------------------
+
+
+
+### 0.1 Keymap status
+Keymap has its state in two parameters:
+**`default_layer`** indicates a base keymap layer(0-31) which is always valid and to be referred, **`keymap_stat`** is 16bit variable which has current on/off status of layers on its each bit.
+
+Keymap layer '0' is usually `default_layer` and which is the only valid layer and other layers is initially off after boot up firmware, though, you can configured them in `config.h`.
+To change `default_layer` will be useful when you switch key layout completely, say you want Colmak instead of Qwerty.
+
+    Initial state of Keymap          Change base layout              
+    -----------------------          ------------------              
+
+      31                               31
+      30                               30
+      29                               29
+       :                                :
+       :                                :   ____________
+       2   ____________                 2  /           /
+       1  /           /              ,->1 /___________/
+    ,->0 /___________/               |  0
+    |                                |
+    `--- default_layer = 0           `--- default_layer = 1
+         layer_state   = 0x00000001       layer_state   = 0x00000002
+
+On the other hand, you shall change `layer_state` to overlay base layer with some layers for feature such as navigation keys, function key(F1-F12), media keys or special actions.
+
+    Overlay feature layer
+    ---------------------      bit|status
+           ____________        ---+------
+      31  /           /        31 |   0
+      30 /___________// -----> 30 |   1
+      29 /___________/  -----> 29 |   1
+       :                        : |   :
+       :   ____________         : |   :
+       2  /           /         2 |   0
+    ,->1 /___________/  ----->  1 |   1
+    |  0                        0 |   0
+    |                                 +
+    `--- default_layer = 1            |
+         layer_state   = 0x60000002 <-'
+
+
+
+### 0.2 Layer Precedence and Transparency
+Note that ***higher layer has higher priority on stack of layers***, namely firmware falls down from top layer to bottom to look up keycode. Once it spots keycode other than **`KC_TRNS`**(transparent) on a layer it stops searching and lower layers aren't referred.
+
+You can place `KC_TRNS` on overlay layer changes just part of layout to fall back on lower or base layer.
+Key with `KC_TRANS` doesn't has its own keycode and refers to lower valid layers for keycode, instead.
+See example below.
+
+
+### 0.3 Keymap Example
+Keymap is **`keymaps[]`** C array in fact and you can define layers in it with **`KEYMAP()`** C macro and keycodes. To use complex actions you need to define `Fn` keycode in **`fn_actions[]`** array.
+
+This is a keymap example for [HHKB](http://en.wikipedia.org/wiki/Happy_Hacking_Keyboard) keyboard.
+This example has three layers, 'Qwerty' as base layer, 'Cursor' and  'Mousekey'.
+In this example,
+
+ `Fn0` is a **momentary layer switching** key, you can use keys on Cursor layer while holding the key.
+
+ `Fn1` is a momentary layer switching key with tapping feature, you can get semicolon **';'** with taping the key and switch layers while holding the key. The word **'tap'** or **'tapping'** mean to press and release a key quickly.
+
+ `Fn2` is a **toggle layer switch** key, you can stay switched layer after releasing the key unlike momentary switching.
+
+You can find other keymap definitions in file `keymap.c` located on project directories.
+
+    static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+        /* 0: Qwerty
+         * ,-----------------------------------------------------------.
+         * |Esc|  1|  2|  3|  4|  5|  6|  7|  8|  9|  0|  -|  =|  \|  `|
+         * |-----------------------------------------------------------|
+         * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|Backs|
+         * |-----------------------------------------------------------|
+         * |Contro|  A|  S|  D|  F|  G|  H|  J|  K|  L|Fn1|  '|Enter   |
+         * |-----------------------------------------------------------|
+         * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift |Fn0|
+         * `-----------------------------------------------------------'
+         *       |Gui|Alt  |Space                  |Alt  |Fn2|
+         *       `-------------------------------------------'
+         */
+        KEYMAP(ESC, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSLS,GRV, \
+               TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   LBRC,RBRC,BSPC, \
+               LCTL,A,   S,   D,   F,   G,   H,   J,   K,   L,   FN1, QUOT,ENT, \
+               LSFT,Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,RSFT,FN0, \
+                    LGUI,LALT,          SPC,                RALT,FN2),
+        /* 1: Cursor(HHKB mode)
+         * ,-----------------------------------------------------------.
+         * |Pwr| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Ins|Del|
+         * |-----------------------------------------------------------|
+         * |Caps |   |   |   |   |   |   |   |Psc|Slk|Pus|Up |   |Backs|
+         * |-----------------------------------------------------------|
+         * |Contro|VoD|VoU|Mut|   |   |  *|  /|Hom|PgU|Lef|Rig|Enter   |
+         * |-----------------------------------------------------------|
+         * |Shift   |   |   |   |   |   |  +|  -|End|PgD|Dow|Shift |   |
+         * `-----------------------------------------------------------'
+         *      |Gui |Alt  |Space                  |Alt  |Gui|
+         *      `--------------------------------------------'
+         */ 
+        KEYMAP(PWR, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, INS, DEL, \
+               CAPS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,PSCR,SLCK,PAUS,UP,  TRNS,BSPC, \
+               LCTL,VOLD,VOLU,MUTE,TRNS,TRNS,PAST,PSLS,HOME,PGUP,LEFT,RGHT,ENT, \
+               LSFT,TRNS,TRNS,TRNS,TRNS,TRNS,PPLS,PMNS,END, PGDN,DOWN,RSFT,TRNS, \
+                    LGUI,LALT,          SPC,                RALT,RGUI),
+        /* 2: Mousekey
+         * ,-----------------------------------------------------------.
+         * |Esc| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Ins|Del|
+         * |-----------------------------------------------------------|
+         * |Tab  |   |   |   |   |   |MwL|MwD|MwU|MwR|   |   |   |Backs|
+         * |-----------------------------------------------------------|
+         * |Contro|   |   |   |   |   |McL|McD|McU|McR|   |   |Return  |
+         * |-----------------------------------------------------------|
+         * |Shift   |   |   |   |   |Mb3|Mb2|Mb1|Mb4|Mb5|   |Shift |   |
+         * `-----------------------------------------------------------'
+         *      |Gui |Alt  |Mb1                    |Alt  |   |
+         *      `--------------------------------------------'
+         * Mc: Mouse Cursor / Mb: Mouse Button / Mw: Mouse Wheel 
+         */
+        KEYMAP(ESC, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, INS, DEL, \
+               TAB, TRNS,TRNS,TRNS,TRNS,TRNS,WH_L,WH_D,WH_U,WH_R,TRNS,TRNS,TRNS,BSPC, \
+               LCTL,TRNS,ACL0,ACL1,ACL2,TRNS,MS_L,MS_D,MS_U,MS_R,TRNS,QUOT,ENT, \
+               LSFT,TRNS,TRNS,TRNS,TRNS,BTN3,BTN2,BTN1,BTN4,BTN5,SLSH,RSFT,TRNS, \
+                    LGUI,LALT,          BTN1,               RALT,TRNS),
+    };
+
+    static const uint16_t PROGMEM fn_actions[] = {
+        ACTION_LAYER_MOMENTARY(1),                  // FN0
+        ACTION_LAYER_TAP_KEY(2, KC_SCLN),           // FN1
+        ACTION_LAYER_TOGGLE(2),                     // FN2
+    };
+
+
+
+
+## 1. Keycode
+See [`common/keycode.h`](../common/keycode.h) or keycode table below for the detail. Keycode is internal **8bit code** to indicate action performed on key in keymap. Keycode has `KC_` prefixed symbol respectively. Most of keycodes like `KC_A` have simple action registers key to host on press and unregister on release, while some of other keycodes has some special actions like `Fn` keys, Media control keys, System control keys and Mousekeys.
+
+ ***In `KEYMAP()` macro you should omit prefix part `KC_` of keycode to keep keymap compact.*** For example, just use `A` instead you place `KC_A` in `KEYMAP()`. Some keycodes has 4-letter **short name** in addition to descriptive name, you'll prefer short one in `KEYMAP()`.
+
+### 1.0 Other key
+- `KC_NO` for no action
+- `KC_TRNS` for layer transparency (See above)
+
+### 1.1 Normal key
+- `KC_A` to `KC_Z`, `KC_1` to `KC_0` for alpha numeric key
+- `KC_MINS`, `KC_EQL`, `KC_GRV`, `KC_RBRC`, `KC_LBRC`, `KC_COMM`, `KC_DOT`, `KC_BSLS`, `KC_SLSH`, `KC_SCLN`, `KC_QUOT`
+- `KC_ESC`, `KC_TAB`, `KC_SPC`, `KC_BSPC`, `KC_ENT`, `KC_DEL`, `KC_INS`
+- `KC_UP`, `KC_DOWN`, `KC_RGHT`, `KC_LEFT`, `KC_PGUP`, `KC_PGDN`, `KC_HOME`, `KC_END`
+- `KC_CAPS`, `KC_NLCK`, `KC_SLCK`, `KC_PSCR`, `KC_PAUS`, `KC_APP`, `KC_F1` to `KC_F24`
+- `KC_P1` to `KC_P0`, `KC_PDOT`, `KC_PCMM`, `KC_PSLS`, `KC_PAST`, `KC_PMNS`, `KC_PPLS`, `KC_PEQL`, `KC_PENT` for keypad.
+
+### 1.2 Modifier
+There are 8 modifiers which has discrimination between left and right. 
+
+- `KC_LCTL` and `KC_RCTL` for Control
+- `KC_LSFT` and `KC_RSFT` for Shift
+- `KC_LALT` and `KC_RALT` for Alt
+- `KC_LGUI` and `KC_RGUI` for Windows key or Command key in Mac
+
+### 1.3 Mousekey
+- `KC_MS_U`, `KC_MS_D`, `KC_MS_L`, `KC_MS_R` for mouse cursor
+- `KC_WH_U`, `KC_WH_D`, `KC_WH_L`, `KC_WH_R` for mouse wheel
+- `KC_BTN1`, `KC_BTN2`, `KC_BTN3`, `KC_BTN4`, `KC_BTN5` for mouse buttons
+
+### 1.4 System & Media key
+- `KC_PWR`, `KC_SLEP`, `KC_WAKE` for Power, Sleep, Wake
+- `KC_MUTE`, `KC_VOLU`, `KC_VOLD` for audio volume control
+- `KC_MNXT`, `KC_MPRV`, `KC_MSTP`, `KC_MPLY`, `KC_MSEL` for media control
+- `KC_MAIL`, `KC_CALC`, `KC_MYCM` for application launch
+- `KC_WSCH`, `KC_WHOM`, `KC_WBAK`, `KC_WFWD`, `KC_WSTP`, `KC_WREF`, `KC_WFAV` for web browser operation
+
+### 1.5 Fn key
+`KC_FNnn` are keycodes for `Fn` key which not given any actions at the beginning unlike most of keycodes has its own inborn action. To use these keycodes in `KEYMAP()` you need to assign action you want at first. Action of `Fn` key is defined in `fn_actions[]` and its index of the array is identical with number part of `KC_FNnn`. Thus `KC_FN0` keycode indicates the action defined in first element of the array. ***32 `Fn` keys can be defined at most.***
+
+### 1.6 Keycode Table
+ See keycode table in [`doc/keycode.txt`](./keycode.txt) for description of keycodes.
+
+ In regard to implementation side most of keycodes are identical with [HID usage][HID_usage](pdf) sent to host for real and some virtual keycodes are defined to support special actions.
+[HID_usage]: http://www.usb.org/developers/devclass_docs/Hut1_11.pdf
+
+
+
+## 2. Action
+See [`common/action_code.h`](../common/action_code.h). Action is a **16bit code** and defines function to perform on events of a key like press, release, holding and tapping.
+
+Most of keys just register 8bit scancode to host, but to support other complex features needs 16bit extended action codes internally. However, using 16bit action codes in keymap results in double size in memory compared to using just keycodes. To avoid this waste 8bit keycodes are used in `KEYMAP()` instead of action codes.
+
+***You can just use keycodes of `Normal key`, `Modifier`, `Mousekey` and `System & Media key` in keymap*** to indicate corresponding actions instead of using action codes. While ***to use other special actions you should use keycode of `Fn` key defined in `fn_actions[]`.***
+
+
+### 2.1 Key Action
+This is a simple action that registers scancodes(HID usage in fact) to host on press event of key and unregister on release.
+
+#### Parameters
++ **mods**: { ` MOD_LCTL`, ` MOD_LSFT`, ` MOD_LALT`, ` MOD_LGUI`,
+              ` MOD_RCTL`, ` MOD_RSFT`, ` MOD_RALT`, ` MOD_RGUI` }
++ **key**: keycode
+
+
+#### 2.1.1 Normal key and Modifier
+***This action usually won't be used expressly in keymap*** because you can just use keycodes in `KEYMAP()` instead.
+
+You can define these actions on *'A'* key and *'left shift'* modifier with:
+
+    ACTION_KEY(KC_A)
+    ACTION_KEY(KC_LSFT)
+
+#### 2.1.2 Modified key
+This action is comprised of strokes of modifiers and a key. `Macro` action is needed if you want more complex key strokes.
+
+Say you want to assign a key to `Shift + 1` to get character *'!'* or `Alt + Tab` to switch application windows.
+
+    ACTION_MODS_KEY(MOD_LSFT, KC_1)
+    ACTION_MODS_KEY(MOD_LALT, KC_TAB)
+
+Or `Alt,Shift + Tab` can be defined. `ACTION_MODS_KEY(mods, key)` requires **4-bit modifier state** and a **keycode** as arguments. See `keycode.h` for `MOD_BIT()` macro.
+
+    ACTION_MODS_KEY(MOD_LALT | MOD_LSFT, KC_TAB)
+
+#### 2.1.3 Multiple Modifiers
+Registers multiple modifiers with pressing a key. To specify multiple modifiers use `|`.
+
+    ACTION_MODS(MOD_ALT | MOD_LSFT)
+
+#### 2.1.3 Modifier with Tap key([Dual role][dual_role])
+Works as a modifier key while holding, but registers a key on tap(press and release quickly).
+
+
+    ACTION_MODS_TAP_KEY(MOD_RCTL, KC_ENT)
+
+
+
+### 2.2 Layer Action
+These actions operate layers of keymap.
+
+#### Parameters
+You can specify a **target layer** of action and **when the action is executed**. Some actions take a **bit value** for bitwise operation.
+
+
++ **layer**: `0`-`31`
++ **on**: { `ON_PRESS` | `ON_RELEASE` | `ON_BOTH` }
++ **bits**: 4-bit value and 1-bit mask bit
+
+
+#### 2.2.1 Default Layer
+Default Layer is a layer which always is valid and referred to when actions is not defined on other overlay layers.
+
+This sets Default Layer to given parameter `layer` and activate it.
+
+    ACTION_DEFAULT_LAYER_SET(layer)
+
+
+#### 2.2.2 Momentary 
+Turns on `layer` momentarily while holding, in other words it activates when key is pressed and deactivate when released.
+
+    ACTION_LAYER_MOMENTARY(layer)
+
+
+#### 2.2.3 Toggle Switch
+Turns on `layer` with first type(press and release) and turns off with next.
+
+    ACTION_LAYER_TOGGLE(layer)
+
+
+#### 2.2.4 Momentary Switch with tap key
+Turns on `layer` momentary while holding, but registers key on tap(press and release quickly).
+
+    ACTION_LAYER_TAP_KEY(layer, key)
+
+
+#### 2.2.5 Momentary Switch with tap toggle
+Turns on `layer` momentary while holding and toggles it with serial taps.
+
+    ACTION_LAYER_TAP_TOGGLE(layer)
+
+
+#### 2.2.6 Invert state of layer
+Inverts current state of `layer`. If the layer is on it becomes off with this action.
+
+    ACTION_LAYER_INVERT(layer, on)
+
+
+#### 2.2.7 Turn On layer
+Turns on layer state.
+
+    ACTION_LAYER_ON(layer, on)
+
+Turns on layer state on press and turns off on release.
+
+    ACTION_LAYER_ON_OFF(layer)
+
+
+#### 2.2.8 Turn Off layer
+Turns off layer state.
+
+    ACTION_LAYER_OFF(layer, on)
+
+Turns off layer state on press and activates on release.
+
+    ACTION_LAYER_OFF_ON(layer)
+
+
+#### 2.2.9 Set layer
+Turn on layer only.
+`layer_state = (1<<layer) [layer: 0-31]`
+
+    ACTION_LAYER_SET(layer, on)
+
+Turns on layer only and clear all layer on release..
+
+    ACTION_LAYER_SET_CLEAR(layer)
+
+
+#### 2.2.10 Bitwise operation
+
+**part** indicates which part of 32bit layer state(0-7). **bits** is 5-bit value. **on** indicates when the action is executed.
+
+    ACTION_LAYER_BIT_AND(part, bits, on)
+    ACTION_LAYER_BIT_OR(part, bits, on)
+    ACTION_LAYER_BIT_XOR(part, bits, on)
+    ACTION_LAYER_BIT_SET(part, bits, on)
+
+These actions works with parameters as following code.
+
+    uint8_t shift = part*4;
+    uint32_t mask = (bits&0x10) ? ~(0xf<<shift) : 0;
+    uint32_t layer_state = layer_state <bitop> ((bits<<shift)|mask);
+
+
+Default Layer also has bitwise operations, they are executed when key is released.
+
+    ACTION_DEFAULT_LAYER_BIT_AND(part, bits)
+    ACTION_DEFAULT_LAYER_BIT_OR(part, bits)
+    ACTION_DEFAULT_LAYER_BIT_XOR(part, bits)
+    ACTION_DEFAULT_LAYER_BIT_SET(part, bits)
+
+
+
+### 2.3 Macro action
+***TBD***
+
+`Macro` action indicates complex key strokes.
+ 
+    MACRO( D(LSHIFT), D(D), END )
+    MACRO( U(D), U(LSHIFT), END )
+    MACRO( I(255), T(H), T(E), T(L), T(L), W(255), T(O), END )
+
+#### 2.3.1 Macro Commands
+- **I()**   change interval of stroke.
+- **D()**   press key
+- **U()**   release key
+- **T()**   type key(press and release)
+- **W()**   wait
+- **END**   end mark
+
+#### 2.3.2 Examples
+
+***TODO: sample implementation***
+See `keyboard/hhkb/keymap.c` for sample.
+
+
+
+### 2.4 Function action
+***TBD***
+
+There are two type of action, normal `Function` and tappable `Function`.
+These actions call user defined function with `id`, `opt`, and key event information as arguments.
+
+#### 2.4.1 Function
+To define normal `Function` action in keymap use this.
+
+    ACTION_FUNCTION(id, opt)
+
+#### 2.4.2 Function with tap
+To define tappable `Function` action in keymap use this.
+
+    ACTION_FUNCTION_TAP(id, opt)
+
+#### 2.4.3 Implement user function
+`Function` actions can be defined freely with C by user in callback function:
+
+    void keymap_call_function(keyrecord_t *event, uint8_t id, uint8_t opt)
+
+This C function is called every time key is operated, argument `id` selects action to be performed and `opt` can be used for option. Function `id` can be 0-255 and `opt` can be 0-15.
+
+ `keyrecord_t` is comprised of key event and tap count. `keyevent_t` indicates which and when key is pressed or released. From `tap_count` you can know tap state, 0 means no tap. These information will be used in user function to decide how action of key is performed.
+
+    typedef struct {
+        keyevent_t  event;
+        uint8_t     tap_count;
+    } keyrecord_t;
+
+    typedef struct {
+        key_t    key;
+        bool     pressed;
+        uint16_t time;
+    } keyevent_t;
+
+    typedef struct {
+        uint8_t col;
+        uint8_t row;
+    } key_t;
+
+***TODO: sample implementation***
+See `keyboard/hhkb/keymap.c` for sample.
+
+
+
+### 2.5 Backlight Action
+These actions control the backlight.
+
+#### 2.5.1 Change backlight level
+Increase backlight level.
+
+    ACTION_BACKLIGHT_INCREASE()
+
+Decrease backlight level.
+
+    ACTION_BACKLIGHT_DECREASE()
+
+Step through backlight levels.
+
+    ACTION_BACKLIGHT_STEP()
+
+Turn a specific backlight level on or off.
+
+    ACTION_BACKLIGHT_LEVEL(1)
+
+#### 2.5.2 Turn on / off backlight
+Turn the backlight on and off without changing level.
+
+    ACTION_BACKLIGHT_TOGGLE()
+
+
+
+## 3. Layer switching Example
+There are some ways to switch layer with 'Layer' actions.
+
+### 3.1 Momentary switching
+Momentary switching changes layer only while holding Fn key.
+
+This action makes 'Layer 1' active(valid) on key press event and inactive on release event. Namely you can overlay a layer on lower layers or default layer temporarily with this action.
+
+    ACTION_LAYER_MOMENTARY(1)
+
+
+Note that after switching on press the actions on destination layer(Layer 1) are performed.
+***Thus you shall need to place an action to go back on destination layer***, or you will be stuck in destination layer without way to get back. Usually you need to place same action or 'KC_TRNS` on destination layer to get back.
+
+
+### 3.2 Toggle switching
+Toggle switching performed after releasing a key. With this action you can keep staying on the destination layer until you type the key again to return.
+
+This performs toggle switching action of 'Layer 2'.
+
+    ACTION_LAYER_TOGGLE(2)
+
+
+
+### 3.3 Momentary switching with Tap key
+These actions switch a layer only while holding a key but register the key on tap. **Tap** means to press and release a key quickly.
+
+    ACTION_LAYER_TAP_KEY(2, KC_SCLN)
+
+With this you can place a layer switching action on normal key like ';' without losing its original key register function. This action allows you to have layer switching action without necessity of a dedicated key. It means you can have it even on home row of keyboard.
+
+
+
+### 3.4 Momentary switching with Tap Toggle
+This switches layer only while holding a key but toggle layer with several taps. **Tap** means to press and release key quickly.
+
+    ACTION_LAYER_TAP_TOGGLE(1)
+
+Number of taps can be configured with `TAPPING_TOGGLE` in `config.h`, `5` by default.
+
+
+
+### 3.5 Momentary switching with Modifiers
+This registers modifier key(s) simultaneously with layer switching.
+
+    ACTION_LAYER_MODS(2, MOD_LSFT | MOD_LALT)
+
+
+
+## 4. Tapping
+Tapping is to press and release a key quickly. Tapping speed is determined with setting of `TAPPING_TERM`, which can be defined in `config.h`, 200ms by default.
+
+### 4.1 Tap Key
+This is a feature to assign normal key action and modifier including layer switching to just same one physical key. This is a kind of [Dual role key][dual_role]. It works as modifier when holding the key but registers normal key when tapping.
+
+Modifier with tap key:
+
+    ACTION_MODS_TAP_KEY(MOD_RSFT, KC_GRV)
+
+Layer switching with tap key:
+
+    ACTION_LAYER_TAP_KEY(2, KC_SCLN)
+
+[dual_role]: http://en.wikipedia.org/wiki/Modifier_key#Dual-role_keys
+
+
+### 4.2 Tap Toggle
+This is a feature to assign both toggle layer and momentary switch layer action to just same one physical key. It works as momentary layer switch when holding a key but toggle switch with several taps.
+
+    ACTION_LAYER_TAP_TOGGLE(1)
+
+
+### 4.3 Oneshot Modifier
+This runs onetime effects which modify only on just one following key. It works as normal modifier key when holding down while oneshot modifier when tapping.
+
+    ACTION_MODS_ONESHOT(MOD_LSFT)
+
+Say you want to type 'The', you have to push and hold Shift key before type 't' then release it before type 'h' and 'e', otherwise you'll get 'THe' or 'the' unintentionally. With Oneshot Modifier you can tap Shift then type 't', 'h' and 'e' normally, you don't need to holding Shift key properly here. This mean you can release Shift before 't' is pressed down.
+
+Oneshot effect is cancel unless following key is pressed down within `ONESHOT_TIMEOUT` of `config.h`. No timeout when it is `0` or not defined.
+
+
+### 4.4 Tap Toggle Mods
+Similar to layer tap toggle, this works as a momentary modifier when holding, but toggles on with several taps. A single tap will 'unstick' the modifier again.
+
+    ACTION_MODS_TAP_TOGGLE(MOD_LSFT)
+
+
+
+
+## 5. Legacy Keymap
+This was used in prior version and still works due to legacy support code in `common/keymap.c`. Legacy keymap doesn't support many of features that new keymap offers. ***It is not recommended to use Legacy Keymap for new project.***
+
+To enable Legacy Keymap support define this macro in `config.h`.
+
+    #define USE_LEGACY_KEYMAP
+
+Legacy Keymap uses two arrays `fn_layer[]` and `fn_keycode[]` to define Fn key. The index of arrays corresponds with postfix number of `Fn` key. Array `fn_layer[]` indicates destination layer to switch and `fn_keycode[]` has keycodes to send when tapping `Fn` key.
+
+In following setting example, `Fn0`, `Fn1` and `Fn2` switch layer to 1, 2 and 2 respectively. `Fn2` registers `Space` key when tapping while `Fn0` and `Fn1` doesn't send any key.
+
+    static const uint8_t PROGMEM fn_layer[] = {
+        1,              // Fn0
+        2,              // Fn1
+        2,              // Fn2
+    };
+
+    static const uint8_t PROGMEM fn_keycode[] = {
+        KC_NO,          // Fn0
+        KC_NO,          // Fn1
+        KC_SPC,         // Fn2
+    };
+
+
+## 6. Terminology
+***TBD***
+### keymap
+is comprised of multiple layers.
+### layer
+is matrix of keycodes.
+### key
+is physical button on keyboard or logical switch on software.
+### keycode
+is codes used on firmware.
+### action
+is a function assigned on a key.
+### layer transparency
+Using transparent keycode one layer can refer key definition on other lower layer.
+### layer precedence
+Top layer has higher precedence than lower layers.
+### tapping
+is to press and release a key quickly.
+### Fn key
+is key which executes a special action like layer switching, mouse key, macro or etc.
+### dual role key
+<http://en.wikipedia.org/wiki/Modifier_key#Dual-role_keys>
diff --git a/tmk_core/doc/other_projects.md b/tmk_core/doc/other_projects.md
new file mode 100644
index 000000000..bf980b0a9
--- /dev/null
+++ b/tmk_core/doc/other_projects.md
@@ -0,0 +1,62 @@
+Other Keyboard Firmware Projects
+================================
+## PJRC USB Keyboard/Mouse Example[USB][PJRC][Teensy][AVR]
+- <http://www.pjrc.com/teensy/usb_keyboard.html>
+- <http://www.pjrc.com/teensy/usb_mouse.html>
+
+## kbupgrade[USB][V-USB][AVR]
+- <http://github.com/rhomann/kbupgrade>
+- <http://geekhack.org/showwiki.php?title=Island:8406>
+
+## c64key[USB][V-USB][AVR]
+- <http://symlink.dk/projects/c64key/>
+
+## rump[USB][V-USB][AVR]
+- <http://mg8.org/rump/>
+- <http://github.com/clee/rump>
+
+## dulcimer[USB][V-USB][AVR]
+- <http://www.schatenseite.de/dulcimer.html>
+
+## humblehacker-keyboard[USB][LUFA][AVR][Ergo]
+- <http://github.com/humblehacker>
+- <http://www.humblehacker.com/keyboard/>
+- <http://geekhack.org/showwiki.php?title=Island:6292>
+
+## ps2avr[PS/2][AVR]
+- <http://sourceforge.net/projects/ps2avr/>
+
+## ErgoDox[Ergo][Split][USB][AVR]
+- <http://geekhack.org/index.php?topic=22780.0>
+- <https://github.com/benblazak/ergodox-firmware>
+- <https://github.com/cub-uanic/tmk_keyboard>
+
+## Suka's keyboard collection[Ergo][Split][3DPrinting][USB][AVR]
+- <http://deskthority.net/workshop-f7/my-diy-keyboard-collection-or-how-i-became-a-kb-geek-t2534.html>
+- <https://github.com/frobiac/adnw>
+
+## bpiphany's AVR-Keyboard[PJRC][AVR][USB]
+- <https://github.com/BathroomEpiphanies/AVR-Keyboard>
+- <http://deskthority.net/wiki/HID_Liberation_Device_-_DIY_Instructions>
+- <http://deskthority.net/wiki/Phantom>
+
+## USB-USB keyboard remapper[converter][USB-USB][AVR][Arduino]
+- <http://forum.colemak.com/viewtopic.php?pid=10837>
+- <https://github.com/darkytoothpaste/keymapper>
+
+## USB-USB converter threads[converter][USB-USB]
+- <http://deskthority.net/workshop-f7/is-remapping-a-usb-keyboard-using-teensy-possible-t2841-30.html>
+- <http://geekhack.org/index.php?topic=19458.0>
+
+## kbdbabel.org[converter][vintage][protocol][8051]
+Great resource of vintage keyboard protocol information and code
+
+- <http://www.kbdbabel.org/>
+
+## Haata's kiibohd Controller[converter][vintage][protocol][AVR][PJRC][Cortex]
+A lots of vintage keyboard protocol supports
+
+- <http://gitorious.org/kiibohd-controller>
+
+## Kinesis ergonomic keyboard firmware replacement[V-USB][LUFA][Ergo]
+- <https://github.com/chrisandreae/kinesis-firmware>