Das Blinkenlights for BSD

Daemonnews: “Those of you who have attempted to use BSD for hardware control know that this is one area where the OS isn’t very cooperative. Programs that link to
hardware control assembly language code have a nasty way of dumping core as soon as you make the call. The process of writing drivers is very involved and
isn’t very well documented. My attempts at activating the driver-generator scripts in /usr/share/examples/drivers resulted in a whole bunch of fatal errors and
no end in sight.”