Re: [PATCH 8/8] q800: add NMI handler

[Laurent Vivier]

Le 13/10/2021 à 23:21, Mark Cave-Ayland a écrit :
> This allows the programmer's switch to be triggered via the monitor for 
> debugging
> purposes. Since the CPU level 7 interrupt is level-triggered, use a timer to 
> hold
> the NMI active for 100ms before releasing it again.
> 

I'm wondering if Qemu provides another way to have a level-triggered interrupt 
in this case.

I' tried to see if keeping the button pressed on a mac kept the IRQ up (as QMP 
NMI does), but a real
mac is too slow and has to many things to display it was not really 
conclusive...

Thanks,
Laurent