[RRuger]

But IL-2 was created before multi core CPUs were common or even coming into the PC world.

I wonder if it is to do with HT capable CPUs. When I do Ctrl-Alt-Del and look at CPU usage history I can select on graph for all CPUs or one graph per CPU. Now I have a P4 3.2Ghz not sure what the name of the CPU is but I think XP sees 2 cores. So I wonder if it would have any effect.

I played with this a bit and that's all I ever saw, so I said hell with it. I have a dual core 3.06 and when I do A-C-D I see what you see, no matter the combination of
=1 - core 0
=2 - core 1
=3 - core 0+1
=4 - core 2
=5 - core 0+2 etc...