The interface to the PC is via RS232 (TTL, so you'll need to level shift to 3.3V or hack a USB to serial cable), and the modules have a lot of cool stuff onboard.
I completed this project a while ago, but I thought I'd better write it up anyway.
A few years ago, I bought a CD duplicator cheaply at an auction, with the intent of upgrading it to a DVD drive. Since then, it had been collecting dust, until I got motivated enough to do something about it.
Project Goal & Requirements
The main aim is to replace the control electronics of a Friendly Robotics RL850/RL1000 lawnmower.