Will a 2.5, or a 2.7, startup with one processor?

Will a LCS system, 2.5 or 2.7, startup with only one physical processor? I mean with the bottom processor physically removed?

It wikk startup with only the 1st one enabled, (CPU0), but youdon't have to phsically remove it.
You might try this also, thanks to old comm guy...
This can be done in open firmware,(boot with cmd+option+O+F held down).
setenv boot-args cpus=1
reset-all

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