diff --git a/README.md b/README.md
index dd03e140..78817a84 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,17 @@ This is a keyboard firmware with some useful features for Atmel AVR controller.
 Source code is available here: <http://github.com/tmk/tmk_keyboard>
 
 
+Updates
+-------
+#### 2015/04/22
+Core library was separated to other branch `core`. <https://github.com/tmk/tmk_keyboard/tree/core>
+
+In `Makefile` you need to set `TMK_DIR` to indicate core library location now.
+
+    TMK_DIR = ../../tmk_core
+
+
+
 Features
 --------
 These features can be used in your keyboard.
@@ -26,6 +37,7 @@ These features can be used in your keyboard.
 * Backlight           - Control backlight levels
 
 
+
 Projects
 --------
 You can find some keyboard specific projects under `converter` and `keyboard` directory.
@@ -139,13 +151,14 @@ Following commands can be also executed with `Magic` + key. In console mode `Mag
     Caps:   Lock Keyboard(Child Proof)
     Paus:   jump to bootloader
 
-**TBD**
 
-### Boot Magic Configuration - Virtual DIP Switch
+
+Boot Magic Configuration - Virtual DIP Switch
+---------------------------------------------
 Boot Magic are executed during boot up time. Press Magic key below then plug in keyboard cable.
 Note that you must use keys of **Layer 0** as Magic keys. These settings are stored in EEPROM so that retain your configure over power cycles.
 
-To avoid configuring accidentally additive salt key `KC_SPACE` also needs to be pressed along with the following configuration keys. The salt key is configurable in `config.h`. See [common/bootmagic.h](common/bootmagic.h).
+To avoid configuring accidentally additive salt key `KC_SPACE` also needs to be pressed along with the following configuration keys. The salt key is configurable in `config.h`. See [tmk_core/common/bootmagic.h](tmk_core/common/bootmagic.h).
 
 #### General
 - Skip reading EEPROM to start with default configuration(`ESC`)
@@ -180,12 +193,6 @@ To avoid configuring accidentally additive salt key `KC_SPACE` also needs to be
 - Set Default Layer to 6(`6`)
 - Set Default Layer to 7(`7`)
 
-#### Caution
-Unintentional use of this feature will cause user confusion.
-
-TODO: Magic key combination to avoid unintentional press during plug in
-
-**TBD**
 
 
 Mechanical Locking support
@@ -196,39 +203,10 @@ This feature makes it possible for you to use mechanical switch for `CapsLock`,
     #define LOCKING_RESYNC_ENABLE
 
 
+
 Start Your Own Project
 -----------------------
 **TBD**
-### Config.h Options
-#### 1. USB vendor/product ID and device description
-    #define VENDOR_ID       0xFEED
-    #define PRODUCT_ID      0xBEEF
-    #define MANUFACTURER    t.m.k.
-    #define PRODUCT         Macway mod
-    #define DESCRIPTION     t.m.k. keyboard firmware for Macway mod
-
-#### 2. Keyboard matrix configuration
-    #define MATRIX_ROWS 8
-    #define MATRIX_COLS 8
-    #define MATRIX_HAS_GHOST
-
-
-
-Architecture
-------------
-    Architecture Diagram
-                               +---------------+---------------+-------------+
-                               |    Host       |   Keyboard    | Matrix, LED |
-       ___________             |-----------+-+ +-------------+ | +-----------|
-      /          /| Keys/Mouse | Protocol  |d| | Action      | | | Protocol  |
-     /__________/ |<-----------|  LUFA     |r| |  Layer, Tap | | |  Matrix   |
-     |.--------.| |   LED      |  V-USB    |i| |-------------| | |  PS/2,IBM |             __________________
-     ||        || |----------->|  PJRC     |v| | Keymap      | | |  ADB,M0110|  Keys      / /_/_/_/_/_/_/_/ /|
-     ||  Host  || |  Console   |  iWRAP(BT)|e| | Mousekey    | | |  SUN/NEWS |<----------/ /_/_/_/_/_/_/_/ / /
-     ||________||/.<-----------|  UART     |r| | Report      | | |  X68K/PC98| Control  / /_/_/_/_/_/_/_/ / /
-     `_========_'/|            |---------------------------------------------|-------->/___ /_______/ ___/ /
-     |_o______o_|/             | Sendchar, Print, Debug, Command, ...        |         |_________________|/
-                               +---------------------------------------------+              Keyboard
 
 
 
@@ -236,52 +214,17 @@ Debugging
 --------
 Use PJRC's `hid_listen` to see debug messages. You can use the tool for debug even if firmware use LUFA stack.
 
-You can use xprintf() to display debug info on `hid_listen`, see `common/xprintf.h`.
+You can use xprintf() to display debug info on `hid_listen`, see `tmk_core/common/xprintf.h`.
 
 
 
 Files and Directories
 -------------------
 ### Top
-* common/       - common codes
-* protocol/     - keyboard protocol support
+* tmk_core/     - core library
 * keyboard/     - keyboard projects
 * converter/    - protocol converter projects
 * doc/          - documents
-* common.mk     - Makefile for common
-* protocol.mk    - Makefile for protocol
-* rules.mk      - Makefile for build rules
-
-### Common
-* host.h
-* host_driver.h
-* keyboard.h
-* command.h
-* keymap.h
-* action.h
-* keycode.h
-* matrix.h
-* led.h
-* mousekey.h
-* report.h
-* debug.h
-* print.h
-* bootloader.h
-* sendchar.h
-* timer.h
-* util.h
-
-### Keyboard Protocols
-* lufa/     - LUFA USB stack
-* pjrc/     - PJRC USB stack
-* vusb/     - Objective Development V-USB
-* iwrap/    - Bluetooth HID for Bluegiga iWRAP
-* ps2.c     - PS/2 protocol
-* adb.c     - Apple Desktop Bus protocol
-* m0110.c   - Macintosh 128K/512K/Plus keyboard protocol
-* news.c    - Sony NEWS keyboard protocol
-* x68k.c    - Sharp X68000 keyboard protocol
-* serial_soft.c - Asynchronous Serial protocol implemented by software