Hi, For those who want to refresh old memories. Hans Bezemer has made big progress as far as performance of qemu is concerned. His specific experience concerns Coherent, but other old unixes could use it. Details can be found in comp.os.coherent news group http://groups.google.com/group/comp.os.coherent/topics The older tuhs message can be mentioned : http://minnie.tuhs.org/pipermail/tuhs/2008-July/001815.html I have also noticed , that Coherent boots well and is very fast in newest virtualbox 4.1.8, running in XP. Dell Optiplex 755 was used with Core 2 Duo. Details can be found in forums for "Other quests" http://www.virtualbox.org It suggests , that other old Unixes could benefit in new virtualbox. Regards Andrzej