# hex4b ![hex4b](https://i.imgur.com/lArfGgHh.jpeg) A PCB for HEX.4B 75% keyboard. * Keyboard Maintainer: [Mechlovin' Studio](https://github.com/mechlovin) * Hardware Supported: Hex.4B Rev.2 PCB, APM32F103CBT6 * Hardware Availability: [Hex Keyboard](https://hexkeyboards.com/) Make example for this keyboard (after setting up your build environment): make mechlovin/hex4b/rev2:default Flashing example for this keyboard: make mechlovin/hex4b/rev2:default:flash See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs). ## Bootloader Enter the bootloader in 3 ways: * **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard * **Bootloader reset**: Hold down the key at (0,13) in the matrix (Backspace) and plug in the keyboard * **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available * **Hardware reset**: Press reset button (located on the top side of the PCB)