Extended MD Pad Buttons Register

Number	TBRegisterNumber::$B2
Readable	TBRegisterReadable::Yes
Writable	TBRegisterWritable::No
Short Description	ShortDesc::Reading additional buttons on MD pads (Joystick/Gamepad)

 bit 7 = 1 if Right Pad X pressed
 bit 6 = 1 if Right Pad Z pressed
 bit 5 = 1 if Right Pad Y pressed
 bit 4 = 1 if Right Pad MODE pressed
 bit 3 = 1 if Left Pad X pressed
 bit 2 = 1 if Left Pad Z pressed
 bit 1 = 1 if Left Pad Y pressed
 bit 0 = 1 if Left Pad MODE pressed