Minor bugfixes, introduced a new timing infrastructure and moved DiskController over to it. Minor performance improvements; now running at 110% speed. Display timing is still too slow.

Contralto/Conversion.cs

@@ -0,0 +1,40 @@
+using System;
+
+namespace Contralto
+{
+    public static class Conversion
+    {
+        public static string ToOctal(int i)
+        {
+            return Convert.ToString(i, 8);            
+        }
+
+        public static string ToOctal(sbyte s)
+        {
+            if (s < 0)
+            {
+                return "-" + Convert.ToString(-s, 8);
+            }
+            else
+            {
+                return Convert.ToString(s, 8);
+            }
+        }
+
+        public static string ToOctal(int i, int digits)
+        {
+            string octalString = Convert.ToString(i, 8);            
+            return new String('0', digits - octalString.Length) + octalString;
+        }
+
+        /// <summary>
+        /// Conversion from millseconds to nanoseconds
+        /// </summary>
+        public static readonly ulong MsecToNsec = 1000000;
+
+        /// <summary>
+        /// Conversion from microseconds to nanoseconds
+        /// </summary>
+        public static readonly ulong UsecToNsec = 1000;
+    }
+}