The keyboard device gives low-level access to the Amiga keyboard.  When
you send this device the command to read one or more keystrokes from the
keyboard, for each keystroke (whether key-up or key-down) the keyboard
device creates a data structure called an input event to describe what
happened. The keyboard device also provides the ability to do operations
within the system reset processing (Ctrl-Amiga-Amiga).

 keyboard device commands and functions 
 device interface 
 reading the keyboard matrix 
 amiga reset handling 
 reading keyboard events 
 additional information on the keyboard device