-# Keymap
+## READ FIRST
+https://github.com/tmk/tmk_keyboard/blob/master/doc/keymap.md
+
+## How to get keycode
+See [doc/keycode.txt](https://github.com/tmk/tmk_keyboard/blob/master/doc/keycode.txt).
+Keycodes are actually defined in [common/keycode.h](https://github.com/tmk/tmk_keyboard/blob/master/common/keycode.h).
+
## Sysrq key
-see #168
+Use keycode for Print Screen(`KC_PSCREEN` or `KC_PSCR`) instead of `KC_SYSREQ`. Key combination of 'Alt + Print Screen' is recognized as 'System request'.
+
+See [issue #168](https://github.com/tmk/tmk_keyboard/issues/168) and
+- http://en.wikipedia.org/wiki/Magic_SysRq_key
+- http://en.wikipedia.org/wiki/System_request
## Power key doesn't work
Use `KC_PWR` instead of `KC_POWER` or vice versa.
Modifier keys or layers can be stuck unless layer switching is configured properly.
For Modifier keys and layer actions you have to place `KC_TRANS` on same position of destination layer to unregister the modifier key or return to previous layer on release event.
-https://github.com/tmk/tmk_keyboard/blob/master/doc/keymap.md#31-momentary-switching
-http://geekhack.org/index.php?topic=57008.msg1492604#msg1492604
+- https://github.com/tmk/tmk_keyboard/blob/master/doc/keymap.md#31-momentary-switching
+- http://geekhack.org/index.php?topic=57008.msg1492604#msg1492604
+- https://github.com/tmk/tmk_keyboard/issues/248
## Mechanical Lock Switch Support
- http://en.wikipedia.org/wiki/Compose_key
And see this for **Unicode** input.
-- http://en.wikipedia.org/wiki/Unicode_input
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+- http://en.wikipedia.org/wiki/Unicode_input
+
+
+### Apple keyboard Fn
+Not supported.
+
+Apple keyboard sends keycode for Fn unlike most of other keyboards.
+I think you can send Apple Fn key using Apple venter specific Page 0xff00 and usage 0x0003. But you have to change HID Report Descriptor for this, of course.
+
+https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/AppleHIDUsageTables.h
+
+
+## Media control keys in Mac OSX
+#### KC_MNXT and KC_MPRV does not work on Mac
+Use `KC_MFFD`(`KC_MEDIA_FAST_FORWARD`) and `KC_MRWD`(`KC_MEDIA_REWIND`) instead of `KC_MNXT` and `KC_MPRV`.
+See https://github.com/tmk/tmk_keyboard/issues/195
+
+
+## Keys supported in Mac OSX?
+You can know which keycodes are supported in OSX from this source code.
+
+`usb_2_adb_keymap` array maps Keyboard/Keypad Page usages to ADB scancodes(OSX internal keycodes).
+
+https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/Cosmo_USB2ADB.c
+
+And `IOHIDConsumer::dispatchConsumerEvent` handles Consumer page usages.
+
+https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/IOHIDConsumer.cpp
+
+
+## JIS keys in Mac OSX
+Japanese JIS keyboard specific keys like `無変換(Muhenkan)`, `変換(Henkan)`, `ひらがな(hiragana)` are not recognized on OSX. You can use **Seil** to enable those keys, try following options.
+
+* Enable NFER Key on PC keyboard
+* Enable XFER Key on PC keyboard
+* Enable KATAKANA Key on PC keyboard
+
+https://pqrs.org/osx/karabiner/seil.html
+
+
+## RN-42 Bluetooth doesn't work with Karabiner
+Karabiner - Keymapping tool on Mac OSX - ignores inputs from RN-42 module by default. You have to enable this option to make Karabiner working with your keyboard.
+https://github.com/tekezo/Karabiner/issues/403#issuecomment-102559237
+
+See these for the deail of this problem.
+https://github.com/tmk/tmk_keyboard/issues/213
+https://github.com/tekezo/Karabiner/issues/403
+
+
+## Esc and `~ on a key
+https://github.com/p3lim/keyboard_firmware/commit/fd799c12b69a5ab5addd1d4c03380a1b8ef8e9dc
+
+
+## 32 Fn keys are not enough?
+### actionmap
+It uses 16 bit codes and has no limitation of 32 Fn at the expense of memory space. TMK keymap is actually is 8 bit codes as subset of the actionmap.
+https://github.com/tmk/tmk_keyboard/issues?utf8=%E2%9C%93&q=is%3Aissue+actionmap
+
+### extension for modified keys
+https://geekhack.org/index.php?topic=41989.msg1885526#msg1885526
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projects / qmk_firmware.git / blobdiff