1 Understanding the essential changes made on the [tmk_keyboard firmware](http://github.com/tmk/tmk_keyboard) should help you understand the QMK Firmware.
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5 | Maintainer |hasu (@tmk) |Jack Humbert et al. |
6 | Build path customization | `TMK_DIR = ...` | `include .../Makefile` |
7 | `keymaps` array data | 3D array of `uint8_t` holding **keycode** | 3D array of `uint16_t` holding **keycode** |