diff --git a/02_MENT/a.out b/02_MENT/a.out
index f49d944..bb90f23 100755
Binary files a/02_MENT/a.out and b/02_MENT/a.out differ
diff --git a/02_MENT/main_02_MENT.cpp b/02_MENT/main_02_MENT.cpp
index d3316e2..99fd0b8 100644
--- a/02_MENT/main_02_MENT.cpp
+++ b/02_MENT/main_02_MENT.cpp
@@ -40,9 +40,13 @@ void printPascalString(PascalString s) {
     }
 }
 
+int intToDual(int n) {
+    
+}
+
 int main(int argc, char** argv, char** envp) {
-	PascalString s = {3, '1', '0', '0'};
-	PascalString s2 = {4, 'f', 'f', 'f', 'f'};
+  PascalString s = {3, '1', '0', '0'};
+  PascalString s2 = {4, 'f', 'f', 'f', 'f'};
   println(hexStringToInt(s));
   println(hexStringToInt(s2));
 
@@ -52,6 +56,14 @@ int main(int argc, char** argv, char** envp) {
   
   printPascalString(s2);
   
-  	return 0;
+  int controlRegister = 128;
+  controlRegister |= 64+32;
+  controlRegister ^=16;
+  controlRegister &= 128+64;
+  controlRegister <<= 1;
+  
+  println(controlRegister);
+  
+  return 0;
 }