For those of you who are Spacewar! buffs and you haven't seen Norbert Landsteiner's work, you are missing something big. Norbert has what I believe to be the best simulation of original PDP-1 Spacewar! code running on a Model 30 display. And he doesn't just have one version Spacewar! - but several original versions. In addition, Norbert analyzed the original Spacewar! code line-by-line and created an incredible set of writeups on Spacewar! internals. As Norbert created his writeups, he sent them to me. I read them over, and forwarded them to the entire PDP-1 Team at the Computer History Museum. That Team includes Steve Russell (principal author of Spacewar!) and Peter Samson (Spacewar! star field, etc.). Additionally, I met with both Steve and Peter and we reviewed several of Norbert's writeups together in some detail - and found only a few minor corrections/comments to pass back to Norbert. Here are links to Norbert's work: Simulation ---------- http://www.masswerk.at/spacewar/ Writeups (Inside Spacewar!) --------------------------- http://www.masswerk.at/spacewar/inside/ Cheers, Lyle -- Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"