Initial rough implementation of Display hardware and associated tasks. Not really working.

Contralto/AltoSystem.cs

@@ -51,6 +51,17 @@ namespace Contralto
             _displayController.Reset();
         }
 
+        /// <summary>
+        /// Attaches an emulated display device to the system.
+        /// TODO: This is currently tightly-coupled with the Debugger, make
+        /// more general.
+        /// </summary>
+        /// <param name="d"></param>
+        public void AttachDisplay(Debugger d)
+        {
+            _displayController.AttachDisplay(d);
+        }
+
         public void SingleStep()
         {
             // Run every device that needs attention for a single clock cycle.
@@ -75,6 +86,11 @@ namespace Contralto
             get { return _diskController; }
         }
 
+        public DisplayController DisplayController
+        {
+            get { return _displayController; }
+        }
+
         /// <summary>
         /// Time (in msec) for one system clock
         /// </summary>