Hello there shred, it's not often I come across a Super-80 user any more. The only 2400 baud system I remember was written by some guy in Brisbane? I tried it and could never get anything to load. The 3000 baud system worked really well though. Fast and totally reliable. I've never tried adding any disk support, as I never owned a suitable disk drive. I think I do have the Super80 DOS, and Twinboot software laying about somewhere. But my problem is I know nothing much about drives and drive controllers, or how to connect them to anything. So you're probably on your own there. But if you get it to work, I'd most probably add it to the official MESS.