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Gray Studio HB85

Gray Studio HB85

A Sony HitBit MSX Computer inspired Keyboard.

Keyboard Maintainer: Felipe Coury
Hardware Supported: Gray Studio HB85
Hardware Availability: Group buy finished

Make example for this keyboard (after setting up your build environment):

make gray_studio/hb85:default


ps2avr(GB) boards use an atmega32a microcontroller and a different bootloader. It is not flashable using the regular QMK methods.

Reset Key: To put the HB85 into reset, hold F3 (K00) while plugging in.


  1. Download HIDBootFlash.
  2. Place your keyboard into reset.
  3. Press the Find Device button and ensure that your keyboard is found.
  4. Press the Open .hex File button and locate the .hex file you created.
  5. Press the Flash Device button and wait for the process to complete.


  1. Install homebrew by typing the following:
    /usr/bin/ruby -e "$(curl -fsSL"
  2. Install crosspack-avr.
    brew cask install crosspack-avr
  3. Install the following packages:
    brew install python
    pip3 install pyusb
    brew install --HEAD`
  4. Place your keyboard into reset.
  5. Flash the board by typing bootloadHID -r followed by the path to your .hex file.

Please Note: You will need to use the EEP_RST keycode first, followed by unplugging/replugging the board to get RGB underglow effects to work.

See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.

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