diff --git a/02_MENT/Testat/a.out b/02_MENT/Testat/a.out
new file mode 100755
index 0000000..6eb0bf4
Binary files /dev/null and b/02_MENT/Testat/a.out differ
diff --git a/02_MENT/Testat/main_02_MENT.cpp b/02_MENT/Testat/main_02_MENT.cpp
index 1cead71..c7e1090 100644
--- a/02_MENT/Testat/main_02_MENT.cpp
+++ b/02_MENT/Testat/main_02_MENT.cpp
@@ -10,11 +10,48 @@ struct PascalString{
 	char characters[256];  // chars of some character string
 };
 
-int main(int argc, char** argv, char** envp) {
-
-  PascalString s = {3, '1', '0', '0'};
-  PascalString s2 = {4, 'f', 'f', 'f', 'f'};
-  
-  return 0;
+void printPascalString(PascalString string) {
+    for(int i = 0; i <= string.length; ++i) {
+        print(string.characters[i]);
+    }
+    println("");
 }
 
+PascalString dualOr(PascalString a, PascalString b) {
+    PascalString longString = a.length >= b.length ? a : b;
+    PascalString shortString = a.length >= b.length ? b : a;
+    
+    
+    PascalString result = {longString.length};
+
+    /*
+    for(int i = longString.length; i >= 0; --i) {
+        if(i >= shortString.length) result.characters[i] = '0';
+        else result.characters[i] = shortString.characters[i];
+    }
+    */
+    for(int i = 0; i < longString.length; i++) {
+        if(i <= shortString.length) {
+            result.characters[i] = longString.characters[i];
+            //println("lang ", longString.characters[i]);
+        }
+        else{
+            result.characters[i] = longString.characters[i] | shortString.characters[i];
+            //println("beides ", shortString.characters[i] | longString.characters[i]);
+        }
+    }
+    return result;
+    
+}
+
+int main(int argc, char** argv, char** envp) {  
+  printPascalString(dualOr({2, '0', '1'}, {2, '1', '0'}));
+    printPascalString(dualOr({2, '0', '1'}, {3, '1', '1', '1'}));
+    printPascalString(dualOr({3, '1', '1', '1'}, {4, '1', '1', '0', '1'}));
+    printPascalString(dualOr({3, '0', '0', '0'}, {5, '1', '1', '0', '1', '0'}));
+    printPascalString(dualOr({3, '0', '1', '1'}, {6, '1', '1', '0', '1', '0', '1'}));
+    printPascalString(dualOr({2, '0', '1'}, {6, '1', '1', '0', '1', '0', '1'}));
+    printPascalString(dualOr({2, '1', '1'}, {6, '1', '0', '0', '1', '0', '0'}));
+
+  return 0;
+}
diff --git a/02_MENT/Testat2/a.out b/02_MENT/Testat2/a.out
new file mode 100755
index 0000000..2060c68
Binary files /dev/null and b/02_MENT/Testat2/a.out differ
diff --git a/02_MENT/Testat2/build.sh b/02_MENT/Testat2/build.sh
new file mode 100755
index 0000000..9cb70b2
--- /dev/null
+++ b/02_MENT/Testat2/build.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+rm *.out
+
+clang++-6.0 -std=c++14 main_02_MENT.cpp
+
+./a.out
diff --git a/02_MENT/Testat2/main_02_MENT.cpp b/02_MENT/Testat2/main_02_MENT.cpp
new file mode 100644
index 0000000..7187d34
--- /dev/null
+++ b/02_MENT/Testat2/main_02_MENT.cpp
@@ -0,0 +1,51 @@
+// file: main_02_MENT.cpp
+// THIS IS C++, use clang++
+
+#include <iostream>
+
+#include "../../helpers/println.hpp"
+
+struct PascalString{
+	int length;            // number of chars used
+	char characters[256];  // chars of some character string
+};
+
+void printPascalString(PascalString s) {
+    for(int i = 0; i <= s.length; ++i) {
+        print(s.characters[i]);
+    }
+    println("");
+    
+}
+
+PascalString bitwiseDualOr(PascalString a, PascalString b) {
+    PascalString shortString = a.length <= b.length ? a : b;
+    PascalString longString = a.length <= b.length ? b : a;
+    
+    PascalString result = {longString.length};
+    
+    for(int i = 1; i <= shortString.length; ++i) {
+        result.characters[result.length -i] = longString.characters[longString.length -i] | shortString.characters[shortString.length -i];
+        //println(result.length -i, ": ",result.characters[result.length -i]," l=",longString.length -i, ":",longString.characters[longString.length -i]," s=",shortString.length -i,":", shortString.characters[shortString.length -i]);
+    }
+    for(int i = (longString.length - shortString.length)-1; i >= 0 ; --i) {
+        result.characters[i] = longString.characters[i];
+        //println(i, ": ", result.characters[i]);
+    }
+    
+    return result;
+}
+
+
+int main(int argc, char** argv, char** envp) {
+    
+    printPascalString(bitwiseDualOr({2, '0', '1'}, {2, '1', '0'}));
+    printPascalString(bitwiseDualOr({2, '0', '1'}, {3, '1', '1', '1'}));
+    printPascalString(bitwiseDualOr({3, '1', '1', '1'}, {4, '1', '1', '0', '1'}));
+    printPascalString(bitwiseDualOr({3, '0', '0', '0'}, {5, '1', '1', '0', '1', '0'}));
+    printPascalString(bitwiseDualOr({3, '0', '1', '1'}, {6, '1', '1', '0', '1', '0', '1'}));
+    printPascalString(bitwiseDualOr({2, '0', '1'}, {6, '1', '1', '0', '1', '0', '1'}));
+    printPascalString(bitwiseDualOr({2, '1', '1'}, {6, '1', '0', '0', '1', '0', '0'}));
+
+  return 0;
+}
diff --git a/02_MENT/a.out b/02_MENT/a.out
new file mode 100755
index 0000000..0ba37c6
Binary files /dev/null and b/02_MENT/a.out differ
diff --git a/02_MENT/limits.out b/02_MENT/limits.out
new file mode 100755
index 0000000..9fabb90
Binary files /dev/null and b/02_MENT/limits.out differ
diff --git a/02_MENT/main_02_MENT.cpp b/02_MENT/main_02_MENT.cpp
index becb934..6ec3665 100644
--- a/02_MENT/main_02_MENT.cpp
+++ b/02_MENT/main_02_MENT.cpp
@@ -52,6 +52,28 @@ PascalString intToDual(int n) {
     return string;
 }
 
+char intToHexChar(int n) {
+        switch(n) {
+            case 0: return '0';
+            case 1: return '1';
+            case 2: return '2';
+            case 3: return '3';
+            case 4: return '4';
+            case 5: return '5';
+            case 6: return '6';
+            case 7: return '7';
+            case 8: return '8';
+            case 9: return '9';
+            case 10: return 'A';
+            case 11: return 'B';
+            case 12: return 'C';
+            case 13: return 'D';
+            case 14: return 'E';
+            case 15: return 'F';
+            default: return 'X';
+        }
+}
+
 PascalString intToHex(int n) {
     int i = std::to_string(n).length();
     PascalString string = {i};
@@ -70,26 +92,30 @@ int getInt(char character) {
 }
 
 PascalString bitwiseDualAnd(PascalString a, PascalString b) {
-    PascalString result = {a.length, '0'};
+    PascalString result = {b.length};
 
-    for(int i = a.length; i >= 0; --i) {
-        if(a.length < i) result.characters[i] = a.characters[i];
-        println("i: ", i, " ", getInt(a.characters[i]) & getInt(b.characters[i]));
-        result.characters[i] = getInt(a.characters[i]) & getInt(b.characters[i]);
+    for(int i = 0; i <= b.length; ++i) {
+        result.characters[i] = a.characters[i] & b.characters[i];
     }
-
     return result;
 }
 
-PascalString bitwiseHexAnd(PascalString a, PascalString b) {
-    PascalString result = {a.length, '0'};
+PascalString bitwiseOctalAnd(PascalString a, PascalString b) {
+    PascalString result = {b.length, '0'};
 
-    for(int i = b.length; i >= 0; --i) {
-        if(a.length < i) result.characters[i] = a.characters[i];
-        println("i: ", i, " ", a.characters[i] & b.characters[i]);
+    for(int i = 0; i <= b.length; ++i) {
         result.characters[i] = a.characters[i] & b.characters[i];
     }
+    return result;
+}
 
+
+
+PascalString bitwiseHexAnd(PascalString a, PascalString b) {
+    a = intToDual(hexStringToInt(a));
+    b = intToDual(hexStringToInt(b));
+    PascalString result = bitwiseDualAnd(a, b);
+    
     return result;
 }
 
@@ -102,7 +128,7 @@ println("===================================");
 }
 
 int main(int argc, char** argv, char** envp) {
-
+    
   PascalString s = {3, '1', '0', '0'};
   PascalString s2 = {4, 'f', 'f', 'f', 'f'};
   println(hexStringToInt(s));
@@ -137,13 +163,19 @@ int main(int argc, char** argv, char** envp) {
   printPascalString(intToHex(1956));
 
   line();
-  printPascalString(bitwiseDualAnd({3, '1', '1', '0'}, {4, '1', '1', '1', '0'}));
+  printPascalString(bitwiseDualAnd({3, '1', '1', '0'}, {3, '1', '1', '1'}));
   line();
-  printPascalString(bitwiseDualAnd({3, '1', '1', '1'}, {4, '1', '1', '1', '0'}));
+  printPascalString(bitwiseDualAnd({3, '1', '1', '1'}, {3, '1', '1', '1'}));
   line();
-  printPascalString(bitwiseDualAnd({3, '1', '1', '0'}, {4, '1', '1', '1', '1'}));
+  printPascalString(bitwiseDualAnd({3, '0', '1', '0'}, {3, '1', '0', '1'}));
   line();
-  printPascalString(bitwiseDualAnd({3, '0', '1', '0'}, {4, '1', '0', '1', '1'}));
+  printPascalString(bitwiseDualAnd({3, '1', '0', '0'}, {3, '1', '1', '1'}));
+  line();
+  printPascalString(bitwiseOctalAnd({2, '6', '3'}, {2, '1', '2'}));
+  
+  
+  line();
+  printPascalString(bitwiseHexAnd({2, 'A', '1'}, {2, 'C', '2'}));
 
   return 0;
 }
diff --git a/02_MENT/main_02_MENT.cpp.save b/02_MENT/main_02_MENT.cpp.save
new file mode 100644
index 0000000..3a1f59d
--- /dev/null
+++ b/02_MENT/main_02_MENT.cpp.save
@@ -0,0 +1,164 @@
+// file: main_02_MENT.cpp
+// THIS IS C++, use clang++
+
+#include <iostream>
+
+#include "../helpers/println.hpp"
+
+struct PascalString{
+	int length;            // number of chars used
+	char characters[256];  // chars of some character string
+};
+
+char cStringArea[1024];
+
+int hexDigitToInt(char hexDigit) {
+int value = 0;
+
+if(hexDigit > 47 && hexDigit < 58)
+    value = hexDigit - 48;
+
+if(hexDigit > 96 && hexDigit < 103)
+    value = hexDigit - 97 + 10;
+
+return value;
+}
+
+int hexStringToInt(PascalString binaryDigits) {
+    int returnValue = 0;
+
+    for(int i = 0; i <= binaryDigits.length; ++i) {
+        returnValue += binaryDigits.characters[i];
+    }
+
+    return returnValue;
+}
+
+void printPascalString(PascalString s) {
+    for(int i = 0; i <= s.length; i++) {
+        print(s.characters[i]);
+    }
+    println(""
+);
+}
+
+PascalString intToDual(int n) {
+    
+    int i = std::to_string(n).length() * 4;
+    PascalString string = {i};
+    while(n >= 1) {
+        string.characters[i] = (n % 2) + '0';
+        n = n / 2;
+        i--;
+    }
+    return string;
+}
+
+char intToHexChar(int n) {
+    if(n > 9) {
+        switch(n) {
+            case 10: return 'A';
+            case 11: return 'B';
+            case 12: return 'C';
+            case 13: return 'D';
+            case 14: return 'E';
+            case 15: return 'F';
+            default: return 'X';
+        }
+    }
+    else return n + '0';
+}
+
+PascalString intToHex(int n) {
+    int i = std::to_string(n).length();
+    PascalString string = {i};
+    while(n >= 1) {
+        string.characters[i] = intToHexChar(n % 16);
+        n = n / 16;
+        i--;
+    }
+    return string;
+
+}
+
+PascalString bitwiseDualAnd(PascalString a, PascalString b) {
+    PascalString shortString = a.length < b.length ? a : b;
+    PascalString longString = a.length > b.length ? a : b;
+    PascalString result = {longString.length, '0'};
+    
+    for(int i = longString.length; i >= 0; --i) {
+        if(shortString.length < i) result.characters[i] = longString.characters[i];
+        result.characters[i] = longString.characters[i] & shortString.characters[i];
+    }
+    
+    return result;
+}
+
+PascalString bitwiseHexAnd(PascalString a, PascalString b) {
+    PascalString shortString = a.length < b.length ? a : b;
+    PascalString longString = a.length > b.length ? a : b;
+    PascalString result = {longString.length, '0'};
+
+    for(int i = longString.length; i >= 0; --i) {
+        if(shortString.length < i) result.characters[i] = longString.characters[i];
+        result.characters[i] = longString.characters[i] & shortString.characters[i];
+    }
+
+    return result;
+}
+
+int to_c_string(PascalString s) {
+
+}
+
+void line() {
+println("===================================");
+}
+
+int main(int argc, char** argv, char** envp) {
+
+  PascalString s = {3, '1', '0', '0'};
+  PascalString s2 = {4, 'f', 'f', 'f', 'f'};
+  println(hexStringToInt(s));
+  line();
+  println(hexStringToInt(s2));
+  line();
+  println(hexDigitToInt('d'));
+  line();
+  println(hexDigitToInt('9'));
+  line();
+  println(hexDigitToInt('2'));
+  
+  printPascalString(s2);
+  line();
+  
+  int controlRegister = 128;
+  controlRegister |= 64+32;
+  controlRegister ^=16;
+  controlRegister &= 128+64;
+  controlRegister <<= 1;
+  
+  println(controlRegister);
+  line();
+  println(intToHexChar(6));
+  line();
+  println(intToHexChar(10));
+  line();
+  printPascalString(intToDual(4106));
+  line();
+  printPascalString(intToHex(965));
+  line();
+  printPascalString(intToHex(1956));
+
+  line();
+  printPascalString(bitwiseDualAnd({3, '1', '1', '0'}, {4, '1', '1', '1', '0'}));
+  line();
+  printPascalString(bitwiseDualAnd({3, '1', '1', '1'}, {4, '1', '1', '1', '0'}));
+  line();
+  printPascalString(bitwiseDualAnd({3, '1', '1', '0'}, {4, '1', '1', '1', '1'}));
+  line();
+  printPascalString(bitwiseDualAnd({3, '0', '1', '0'}, {4, '1', '0', '1', '1'}));
+  
+  return 0;
+}
+
diff --git a/02_MENT/println.out b/02_MENT/println.out
new file mode 100755
index 0000000..9a4b5b8
Binary files /dev/null and b/02_MENT/println.out differ