Keyboard Control

• pxl-wmf-kbd-get_keyboard_attributes: get_keyboard_attributes/[1,2]
• pxl-wmf-kbd-put_keyboard_attributes: put_keyboard_attributes/[1,2]
• pxl-wmf-kbd-bell: bell/[1,2]

ProXL uses the concept of keyboard attributes to query and control the state of the keyboard.