https://github.com/tmk/tmk_core/blob/master/doc/keymap.md
## How to get keycode
-See [Keycodes](Keycodes). Keycodes are actually defined in [common/keycode.h](https://github.com/qmk/qmk_keyboard/blob/master/common/keycode.h).
+See [Keycodes](Keycodes). Keycodes are actually defined in [common/keycode.h](https://github.com/qmk/qmk_firmware/blob/master/tmk_core/common/keycode.h).
## Sysrq key
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'.
here real_mods lost state for 'physical left shift'.
weak_mods is ORed with real_mods when keyboard report is sent.
-https://github.com/tmk/tmk_core/blob/master/common/action_util.c#L57
+https://github.com/tmk/tmk_core/blob/master/common/action_util.c#L57
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