Base derived from dbroqua (special thanks)
Based on HHKB with the following dip switches engaged:
Additionally, this layout includes a mouse layer engaged by tapping Fn 3 times, holding on the third time. The arrow keys move the mouse, scrolling when shift is held (either left or right). Right alt is left click, right meta is right click.
Enter into programming mode and run the following command.
$ sudo KEYMAP=dkrieger_hhkb make dfu