Peripheral 5 Register

Number	$0A
Readable	Yes
Writable	Yes
Short Description	Mouse buttons and DPI config

Since core 3.1.5 (new register):

Bit	Function
7-3	Reserved, must be zero
2	1 to reverse left and right mouse buttons (hard reset = 0)
1-0	mouse dpi (hard reset = %01)  %00 = low dpi  %01 = default  %10 = medium dpi  %11 = high dpi