Fixed S register addressing (many things now working!), tweaked display (mouse displays correctly in lowres mode). Added support for committing disk changes back to disk images (done automatically when switching disks or exiting). Repaired BravoX image.

Contralto/ExecutionController.cs

@@ -18,7 +18,8 @@ namespace Contralto
         {
             _system = system;
 
-            _execAbort = false;            
+            _execAbort = false;
+            _userAbort = false;
 
         }        
 
@@ -29,7 +30,7 @@ namespace Contralto
 
         public void StopExecution()
         {
-            _execAbort = true;
+            _userAbort = true;
 
             if (_execThread != null)
             {
@@ -80,6 +81,7 @@ namespace Contralto
             }
 
             _execAbort = false;
+            _userAbort = false;
 
             _execThread = new Thread(new System.Threading.ThreadStart(ExecuteProc));
             _execThread.Start();
@@ -108,7 +110,7 @@ namespace Contralto
                     _execAbort = _stepCallback();
                 }
 
-                if (_execAbort)
+                if (_execAbort || _userAbort)
                 {
                     // Halt execution
                     break;
@@ -119,6 +121,7 @@ namespace Contralto
         // Execution thread and state
         private Thread _execThread;        
         private bool _execAbort;
+        private bool _userAbort;
 
         private StepCallbackDelegate _stepCallback;
         private ErrorCallbackDelegate _errorCallback;