JC,
I can help with that one. The SIMH docs state:
" 3.7.2 User Specified Stop Conditions
Typing the interrupt character stops simulation. The interrupt character
is defined by the WRU (where are you) register and is initially set to
005 (^E)."
If I do a "E WRU" I get "WRU: 005:
If I tell SIMH "D WRU 007" that changes the interrupt from ^E to ^G.
I hope this is what you are looking for.
Mike.