[Simh] set cpu idle not working?

[Will Senn]

I am using pdp11 for a v7 instance, and it seems to be taxing the cpu a 
bit more than I'd like on my laptop (killing my battery life). I have 
the following in my ini:

    echo
    echo After Disabling XQ is displayed type in boot
    echo and at the : prompt type in hp(0,0)unix
    echo
    set cpu 11/70
    set cpu 2M
    set cpu idle

Shouldn't this cause the sim to idle when I'm not using it? It doesn't 
appear to have that effect.

I'm on MacOS Sierra 10.12.6, with PDP-11 simulator V4.0-0 Beta        
git commit id: 1d2742ed

Thanks,

Will

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