diff --git a/se/sics/mspsim/core/IOPort.java b/se/sics/mspsim/core/IOPort.java
index 1db7a2b..cbc7162 100644
--- a/se/sics/mspsim/core/IOPort.java
+++ b/se/sics/mspsim/core/IOPort.java
@@ -309,11 +309,12 @@ public class IOPort extends IOUnit {
       }
     }
     
+    //Possible Output 0,1,x but x not implemented therefore 0 is returned
     private int CalcPortOut(){
       int selactive= sel ^ sel2;
       int selValCombine= ((sel & selValue) | (sel2 & selValue2 )) & selactive;
       int outVal=(~selactive & out);
-      return (selValCombine | outVal | ~dir ) & 0xff;      
+      return (selValCombine | (outVal & dir) ) & 0xff;  
     }
     
     private void writePort(PortReg function, int data, long cycles) {
diff --git a/se/sics/mspsim/platform/MSPEXP430F5438/Exp5438Gui.java b/se/sics/mspsim/platform/MSPEXP430F5438/Exp5438Gui.java
index 7e123ee..d4b2d72 100644
--- a/se/sics/mspsim/platform/MSPEXP430F5438/Exp5438Gui.java
+++ b/se/sics/mspsim/platform/MSPEXP430F5438/Exp5438Gui.java
@@ -75,7 +75,7 @@ public class Exp5438Gui extends AbstractNodeGUI {
   };
 
   public Exp5438Gui(Exp5438Node node) {
-    super("MSPSIM fork by Prof. Rüdiger Heintz 0.4.13", "images/MSP-EXP430F5438.jpg");
+    super("MSPSIM fork by Prof. Rüdiger Heintz 0.4.15", "images/MSP-EXP430F5438.jpg");
     this.node = node;
   }