Anders Magnusson wrote:
> That would probably be simple to fix. The P11 PDP11 simulator uses the
> wait instruction in the named way so it actually idles when the cpu calls
> wait. It's probably not difficult to add that to simh either.

I looked over SIMH and it seems to react to the WAIT instruction by
entering
a state in which instructions are not decoded until an acception occurs,
but it still polls for keyboard input and simulated device activity.

The simulator control program does not seem to have been designed with
idling in mind.

> -- Ragge

-chuck