On Sep 16, 2012, at 14:23, Peter Coghlan <HECNET at beyondthepale.ie> wrote: Perhaps there is a host platform specific problem with set cpu idle? That's the conclusion I've come to as it works fine most places. Something about Solaris trips it up but I haven't been able to figure out what yet. I would also like to run multible instances of simh. This works fine for me as long as only one of them tries to do networking. Once I attempt to start networking on a second instance, the networking on the first instance stops working. This makes it difficult to run a vaxcluster on my alpha :-( How are the simh instances sharing the Ethernet interface? -brian