I have been able to install and run ultrix 3, ultrix4 and OpenVMS on the SIMH emulator. No problem at all at any point. Regarding ultrix, the images available on the archive worked like a charm. For ultrix 4 I used an installation CD I still kept around for ULTRIX on VAXen. As for OpenVMS, if you are interested, it also works OK, but getting it is a bit more difficult. First you need a Hobbyist license from HP. You can get one by joining a local VMS user group (or Encompass US if there is none in your Country). Usually you can get a free limited membership that will give you access to the license. It must be renewed periodically. Then you need access to VMS for VAX distribution media. We have been an Ultrix, OSF-Tru64 and VMS shop for a long time, so that wasn't a problem for me. Otherwise it might be difficult. I think you can order a hobbyist copy from HP, but don't rely on my feeble memory. Once you have the license and the media, installing it is just as simple as installing on a real VAX. I had no trouble at all, but again, I've been a VMS sysman as well for over 20 years. The only problematic point is making the network work, but the recipes available on the web are excellent. You can get to them from the links in SIMH web page. or anyother boot tapes emulator with gcc-3.4.6. I write his first anything like this in ______________________________________________ LLama Gratis a cualquier PC del Mundo. Llamadas a fijos y móviles desde 1 céntimo por minuto. http://es.voice.yahoo.com