PiCore On- and Off Button

Hi folks, just a simple question. I already looked through a lot of threads but can’t find an answer.

I want to add a simple push-button with the following function.

1. No power, piCore down —> connect power —> piCore boots
2. power connected, piCore up —> press push button once —> piCore shutdown
3. power connected, piCore down —> press push button again —> piCore boots up

So if I press the button the piCore should shutdown and if I press it again it will boot.

How can I solve this with piCorePlayer 6.0? Didn’t find an answer until now

Best