# Pumptools API
The *api* sub-folder contains various headers that allow you to develop your own libraries to hook into various places
inside pumptools.

## IO
* [PIUBTN](io/piubtn.md): The button board introduced with Pump It Up Pro
* [PIUIO](io/piuio.md): Also known as the MK6 IO, the main IO board for pads and lights
* [X11 input hook](io/x11-input-hook.md): Hook input processing to X11 to receive keyboard events