DIY/Assembled compact ortholinear 50% keyboard by Ortholinear Keyboards.
For the full Quantum feature list, see the parent readme.md.
Download or clone the whole firmware and navigate to the keyboards/preonic folder. Once your dev env is setup, you'll be able to type make to generate your .hex - you can then use make dfu to program your PCB once you hit the reset button.
Depending on which keymap you would like to use, you will have to compile slightly differently.
To build with the default keymap, simply run make default.
Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. To define your own keymap, create a file in the keymaps folder named <name>.c and see keymap document (you can find in top readme.md) and existent keymap files.
To build the firmware binary hex file with a keymap just do make with a keymap like this:
$ make [default|jack|<name>]
Keymaps follow the format <name>.c and are stored in the keymaps folder.