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diff --git a/quantum/action_macro.h b/quantum/action_macro.h
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+++ b/quantum/action_macro.h
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+/*
+Copyright 2013 Jun Wako <wakojun@gmail.com>
+
+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, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <stdint.h>
+#include "progmem.h"
+
+typedef uint8_t macro_t;
+
+#define MACRO_NONE (macro_t *)0
+#define MACRO(...)                                          \
+    ({                                                      \
+        static const macro_t __m[] PROGMEM = {__VA_ARGS__}; \
+        &__m[0];                                            \
+    })
+#define MACRO_GET(p) pgm_read_byte(p)
+
+// Sends press when the macro key is pressed, release when release, or tap_macro when the key has been tapped
+#define MACRO_TAP_HOLD(record, press, release, tap_macro) (((record)->event.pressed) ? (((record)->tap.count <= 0 || (record)->tap.interrupted) ? (press) : MACRO_NONE) : (((record)->tap.count > 0 && !((record)->tap.interrupted)) ? (tap_macro) : (release)))
+
+// Holds down the modifier mod when the macro key is held, or sends macro instead when tapped
+#define MACRO_TAP_HOLD_MOD(record, macro, mod) MACRO_TAP_HOLD(record, (MACRO(D(mod), END)), MACRO(U(mod), END), macro)
+
+// Holds down the modifier mod when the macro key is held, or pressed a shifted key when tapped (eg: shift+3 for #)
+#define MACRO_TAP_SHFT_KEY_HOLD_MOD(record, key, mod) MACRO_TAP_HOLD_MOD(record, (MACRO(I(10), D(LSFT), T(key), U(LSFT), END)), mod)
+
+// Momentary switch layer when held, sends macro if tapped
+#define MACRO_TAP_HOLD_LAYER(record, macro, layer)                                                         \
+    (((record)->event.pressed) ? (((record)->tap.count <= 0 || (record)->tap.interrupted) ? ({             \
+        layer_on((layer));                                                                                 \
+        MACRO_NONE;                                                                                        \
+    })                                                                                                     \
+                                                                                          : MACRO_NONE)    \
+                               : (((record)->tap.count > 0 && !((record)->tap.interrupted)) ? (macro) : ({ \
+                                     layer_off((layer));                                                   \
+                                     MACRO_NONE;                                                           \
+                                 })))
+
+// Momentary switch layer when held, presses a shifted key when tapped (eg: shift+3 for #)
+#define MACRO_TAP_SHFT_KEY_HOLD_LAYER(record, key, layer) MACRO_TAP_HOLD_LAYER(record, MACRO(I(10), D(LSFT), T(key), U(LSFT), END), layer)
+
+#ifndef NO_ACTION_MACRO
+void action_macro_play(const macro_t *macro_p);
+#else
+#    define action_macro_play(macro)
+#endif
+
+/* Macro commands
+ *   code(0x04-73)                      // key down(1byte)
+ *   code(0x04-73) | 0x80               // key up(1byte)
+ *   { KEY_DOWN, code(0x04-0xff) }      // key down(2bytes)
+ *   { KEY_UP,   code(0x04-0xff) }      // key up(2bytes)
+ *   WAIT                               // wait milli-seconds
+ *   INTERVAL                           // set interval between macro commands
+ *   END                                // stop macro execution
+ *
+ * Ideas(Not implemented):
+ *   modifiers
+ *   system usage
+ *   consumer usage
+ *   unicode usage
+ *   function call
+ *   conditionals
+ *   loop
+ */
+enum macro_command_id {
+    /* 0x00 - 0x03 */
+    END = 0x00,
+    KEY_DOWN,
+    KEY_UP,
+
+    /* 0x04 - 0x73 (reserved for keycode down) */
+
+    /* 0x74 - 0x83 */
+    WAIT = 0x74,
+    INTERVAL,
+
+    /* 0x84 - 0xf3 (reserved for keycode up) */
+
+    /* 0xf4 - 0xff */
+};
+
+/* TODO: keycode:0x04-0x73 can be handled by 1byte command  else 2bytes are needed
+ * if keycode between 0x04 and 0x73
+ *      keycode / (keycode|0x80)
+ * else
+ *      {KEY_DOWN, keycode} / {KEY_UP, keycode}
+ */
+#define DOWN(key) KEY_DOWN, (key)
+#define UP(key) KEY_UP, (key)
+#define TYPE(key) DOWN(key), UP(key)
+#define WAIT(ms) WAIT, (ms)
+#define INTERVAL(ms) INTERVAL, (ms)
+
+/* key down */
+#define D(key) DOWN(KC_##key)
+/* key up */
+#define U(key) UP(KC_##key)
+/* key type */
+#define T(key) TYPE(KC_##key)
+/* wait */
+#define W(ms) WAIT(ms)
+/* interval */
+#define I(ms) INTERVAL(ms)
+
+/* for backward comaptibility */
+#define MD(key) DOWN(KC_##key)
+#define MU(key) UP(KC_##key)