Debugger:

. Move the BRK and invalid opcodes checks out of main emulation's Fetch() and into DebugContinueStepping()
. Added a new break condition: when PC reads floating bus or I/O memory
. On a break condition, output a 'Stop Reason' message to the console

source/Frame.cpp

@@ -1898,7 +1898,6 @@ static void ProcessButtonClick(int button, bool bFromButtonUI /*=false*/)
 		else
 		if (g_nAppMode == MODE_DEBUG)
 		{
-			g_bDebugBreakDelayCheck = true;
 			ProcessButtonClick(BTN_RUN); // Exit debugger, switch to MODE_RUNNING or MODE_STEPPING
 		}
 		else