diff -r 958e9fe8afdf -r 551243a66b32 Hardware/Mainboard/SuperIOHardware.cs
--- a/Hardware/Mainboard/SuperIOHardware.cs	Thu Sep 30 16:51:09 2010 +0000
+++ b/Hardware/Mainboard/SuperIOHardware.cs	Thu Sep 30 20:59:21 2010 +0000
@@ -702,11 +702,19 @@
       public readonly float Vf;
       public readonly bool Hidden;
 
+      public Voltage(string name, int index) :
+        this(name, index, false) { }
+      
       public Voltage(string name, int index, bool hidden) :
         this(name, index, 0, 1, 0, hidden) { }
-
+      
+      public Voltage(string name, int index, float ri, float rf) :
+        this(name, index, ri, rf, 0, false) { }
+      
+      // float ri = 0, float rf = 1, float vf = 0, bool hidden = false) 
+      
       public Voltage(string name, int index, 
-        float ri = 0, float rf = 1, float vf = 0, bool hidden = false) 
+        float ri, float rf, float vf, bool hidden) 
       {
         this.Name = name;
         this.Index = index;