DESCRIPTION
 This release supports a “virtual” console device used for 
kernel printf messages and accessed in user mode via 
/dev/console. It is virtual in the sense that it is attached to a hardware interface at boot time. Currently the choices are limited to: a bit-mapped display acting as an 
internal terminal emulator “ITE”, the builtin serial interface 
ser(4), or a 
null(4) console in that order.