DESCRIPTION
 mfp drives Motorola MC68901 MFP (Multi-function Peripheral). 
mfp driver is always required to run the 
NetBSD/x68k kernel, because it is connected to important devices such as the display controller, and provides fundamental functions like the system clock tick and interrupt controller. Since 
mfp provides many functions, most of the jobs as a device driver is done by its child drivers such as 
kbd(4) and 
clock(4). 
mfp driver itself only provides the common way to access its registers and a few utility functions for other non-child drivers.