Creating a kernel driver for a PC speaker

Here’s the start to a lengthy how-to article at Linux.com: “I decided to make the PC speaker (That invisible little thing under the PC hood that beeps) spew rock music.
I wanted it to play real music. I couldn’t bother to write all the code from scratch, to decode MP3, etc. So I
got a little lazy and decided to play games with the most documented, most sophisticated OS ever: Linux.”