As of 2013, model-b is not currently under active development. Although the latest versions date from 2004, they run fine under Windows 7, and should run rather nicely on just about any modern PC. This may change in the future. I don't consider model-b dead - I just don't have the time to work on it! Special thanks to Dave Moore of the very-much-worth-a-visit The Stairway to Hell. Tom Seddon - email modelb snail bbcmicro full-stop com.