diff --git a/src/main/java/fabrik/simulator/pic16f84/Commands.java b/src/main/java/fabrik/simulator/pic16f84/Commands.java
index b5cc81a..d8755ce 100644
--- a/src/main/java/fabrik/simulator/pic16f84/Commands.java
+++ b/src/main/java/fabrik/simulator/pic16f84/Commands.java
@@ -1,8 +1,10 @@
 package fabrik.simulator.pic16f84;
 
 public class Commands {
-    public static void execute(){
-        ;
+    private static int wRegister = 0;
+
+    public static int get_wRegister() {
+        return wRegister;
     }
 
     public static void decode(int instruction){
@@ -12,79 +14,20 @@ public class Commands {
         int bitaddr = 0x380;
         int destinationbit = 0x80;
 
+        int d = (instruction & destinationbit) >> 7;
+        int f = instruction & fileregaddr;
+        int k = instruction & constant;
+        int b = (instruction & bitaddr) >> 7;
+        int j = instruction & jumpaddr;
+
         switch (instruction & 0x3800){
             case 0b10000000000000:
-                System.out.println("CALL");
+                System.out.println("CALL: " + j);
+                CALL (j);
                 return;
             case 0b10100000000000:
-                System.out.println("GOTO");
-                return;
-            default:
-                break;
-        }
-
-        switch (instruction & 0x3F00){
-            case 0b00011100000000:
-                System.out.println("ADDWF");
-                return;
-            case 0b00010100000000:
-                System.out.println("ANDWF");
-                return;
-            case 0b00100100000000:
-                System.out.println("COMF");
-                return;
-            case 0b00001100000000:
-                System.out.println("DECF");
-                return;
-            case 0b00101100000000:
-                System.out.println("DECFSZ");
-                return;
-            case 0b00101000000000:
-                System.out.println("INCF");
-                return;
-            case 0b00111100000000:
-                System.out.println("INCFSZ");
-                return;
-            case 0b00010000000000:
-                System.out.println("IORWF");
-                return;
-            case 0b00100000000000:
-                System.out.println("MOVF");
-                return;
-            case 0b00110100000000:
-                System.out.println("RLF");
-                return;
-            case 0b00001000000000:
-                System.out.println("SUBWF");
-                return;
-            case 0b00111000000000:
-                System.out.println("SWAPF");
-                return;
-            case 0b00011000000000:
-                System.out.println("XORWF");
-                return;
-            case 0b11100100000000:
-                System.out.println("ANDLW");
-                return;
-            case 0b11101000000000:
-                System.out.println("XORLW");
-                return;
-            case 0b11100000000000:
-                System.out.println("IORLW");
-                return;
-            default:
-                break;
-        }
-
-        switch (instruction & 0x3F80){
-            case 0b00000110000000:
-                System.out.println("CLRF");
-                return;
-            case 0b00000100000000:
-                System.out.println("CLRW");
-                return;
-            case 0b00000010000000:
-                System.out.println("MOVWF");
+                System.out.println("GOTO: " + j);
+                GOTO (j);
                 return;
             default:
                 break;
@@ -92,22 +35,28 @@ public class Commands {
 
         switch (instruction & 0x3C00){
             case 0b01000000000000:
-                System.out.println("BCF");
+                System.out.println("BCF: " + f + " " + b);
+                DataRegister.clearBit(f, b);
                 return;
             case 0b01010000000000:
-                System.out.println("BSF");
+                System.out.println("BSF: " + f + " " + b);
+                DataRegister.clearBit(f, b);
                 return;
             case 0b01100000000000:
-                System.out.println("BTFSC");
+                System.out.println("BTFSC: " + f + " " + b);
+                BTFSC(f, b);
                 return;
             case 0b01110000000000:
-                System.out.println("BTFSS");
+                System.out.println("BTFSS: " + f + " " + b);
+                BTFSS(f, b);
                 return;
             case 0b11000000000000:
-                System.out.println("MOVLW");
+                System.out.println("MOVLW: " + k);
+                MOVLW (k);
                 return;
             case 0b11010000000000:
-                System.out.println("RETLW");
+                System.out.println("RETLW: " + k);
+                RETLW (k);
                 return;
             default:
                 break;
@@ -115,10 +64,98 @@ public class Commands {
 
         switch (instruction & 0x3E00){
             case 0b11111000000000:
-                System.out.println("ADDLW");
+                System.out.println("ADDLW: " + k);
+                ADDLW (k);
                 return;
             case 0b11110000000000:
-                System.out.println("SUBLW");
+                System.out.println("SUBLW: " + k);
+                SUBLW (k);
+                return;
+            default:
+                break;
+        }
+
+        switch (instruction & 0x3F00){
+            case 0b00011100000000:
+                System.out.println("ADDWF: " + f + " " + d);
+                ADDWF (f, d);
+                return;
+            case 0b00010100000000:
+                System.out.println("ANDWF: " + f + " " + d);
+                ANDWF (f, d);
+                return;
+            case 0b00100100000000:
+                System.out.println("COMF: " + f + " " + d);
+                COMF (f, d);
+                return;
+            case 0b00001100000000:
+                System.out.println("DECF: " + f + " " + d);
+                DECF (f, d);
+                return;
+            case 0b00101100000000:
+                System.out.println("DECFSZ: " + f + " " + d);
+                DECFSZ (f, d);
+                return;
+            case 0b00101000000000:
+                System.out.println("INCF: " + f + " " + d);
+                INCF (f, d);
+                return;
+            case 0b00111100000000:
+                System.out.println("INCFSZ: " + f + " " + d);
+                INCFSZ (f, d);
+                return;
+            case 0b00010000000000:
+                System.out.println("IORWF: " + f + " " + d);
+                IORWF (f, d);
+                return;
+            case 0b00100000000000:
+                System.out.println("MOVF: " + f + " " + d);
+                MOVF (f, d);
+                return;
+            case 0b00110100000000:
+                System.out.println("RLF: " + f + " " + d);
+                RLF (f, d);
+                return;
+            case 0b00001000000000:
+                System.out.println("SUBWF: " + f + " " + d);
+                SUBWF (f, d);
+                return;
+            case 0b00111000000000:
+                System.out.println("SWAPF: " + f + " " + d);
+                SWAPF (f, d);
+                return;
+            case 0b00011000000000:
+                System.out.println("XORWF: " + f + " " + d);
+                XORWF (f, d);
+                return;
+            case 0b11100100000000:
+                System.out.println("ANDLW: " + k);
+                ANDLW (k);
+                return;
+            case 0b11101000000000:
+                System.out.println("XORLW: " + k);
+                XORLW (k);
+                return;
+            case 0b11100000000000:
+                System.out.println("IORLW: " + k);
+                IORLW (k);
+                return;
+            default:
+                break;
+        }
+
+        switch (instruction & 0x3F80){
+            case 0b00000110000000:
+                System.out.println("CLRF: " + f);
+                CLRF (f);
+                return;
+            case 0b00000100000000:
+                System.out.println("CLRW");
+                CLRW ();
+                return;
+            case 0b00000010000000:
+                System.out.println("MOVWF: " + f);
+                MOVWF (f);
                 return;
             default:
                 break;
@@ -127,15 +164,19 @@ public class Commands {
         switch (instruction){
             case 0b01100100:
                 System.out.println("CLRWDT");
+                //TODO
                 return;
             case 0b1001:
                 System.out.println("RETFIE");
+                //TODO
                 return;
             case 0b1000:
                 System.out.println("RETURN");
+                //TODO
                 return;
             case 0b01100011:
                 System.out.println("SLEEP");
+                //TODO
                 return;
             default:
                 break;
@@ -147,5 +188,215 @@ public class Commands {
         else{
             System.out.println("Nicht gefunden!");
         }
+
+
+    }
+
+    public static void GOTO(int jump) {
+        DataRegister.setPC(jump-1);
+    }
+
+    public static void CALL(int jump) {
+        //TODO
+    }
+
+    public static void MOVWF(int file) {
+        DataRegister.setRegister(file, wRegister);
+    }
+
+    public static void CLRW() {
+        wRegister = 0;
+        //TODO: Zeroflag
+    }
+
+    public static void CLRF(int file) {
+        DataRegister.setRegister(file, 0);
+        //TODO: Zeroflag
+    }
+
+    public static void IORLW(int literal) {
+        wRegister |= literal;
+        //TODO: Zeroflag
+    }
+
+    public static void XORLW(int literal) {
+        wRegister ^= literal;
+        //TODO: Zeroflag
+    }
+
+    public static void ANDLW(int literal) {
+        wRegister &= literal;
+        //TODO: Zeroflag
+    }
+
+    public static void XORWF(int file, int destination) {
+        int result = wRegister ^ DataRegister.getRegister(file);
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        //TODO: Zeroflag
+    }
+
+    public static void SWAPF(int file, int destination) {
+        int content = DataRegister.getRegister(file);
+        int result = (content & 0x0F) << 4 | (content & 0xF0) >> 4;
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+    }
+
+    public static void SUBWF(int file, int destination) {
+        int result = (DataRegister.getRegister(file) - wRegister) & 0xFF;
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        // TODO Zeroflag, Carry, DigitCarry
+    }
+
+    public static void RLF(int file, int destination) {
+        // TODO
+    }
+
+    public static void MOVF(int file, int destination) {
+        int content = DataRegister.getRegister(file);
+        if (destination == 0){
+            wRegister = content;
+        }
+        else {
+            DataRegister.setRegister(file, content);
+        }
+        // TODO: Zeroflag
+    }
+
+    public static void IORWF(int file, int destination) {
+        int result = wRegister | DataRegister.getRegister(file);
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        // TODO: Zeroflag
+    }
+
+    public static void INCFSZ(int file, int destination) {
+        int result = (DataRegister.getRegister(file) + 1) & 0xFF;
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        if (result == 0) {
+            DataRegister.increasePC();
+        }
+    }
+
+    public static void INCF(int file, int destination) {
+        int result = (DataRegister.getRegister(file) + 1) & 0xFF;
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        //TODO: Zeroflag
+    }
+
+    public static void DECFSZ(int file, int destination) {
+        int result = (DataRegister.getRegister(file) -1) & 0xFF;
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        if (result == 0){
+            DataRegister.increasePC();
+        }
+    }
+
+    public static void DECF(int file, int destination) {
+        int result = (DataRegister.getRegister(file) -1) & 0xFF;
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        // TODO: Zeroflag
+    }
+
+    private static void COMF(int file, int destination) {
+        int result = (~ DataRegister.getRegister(file)) & 0xFF;
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        // TODO: Zeroflag
+    }
+
+    public static void ANDWF(int file, int destination) {
+        int result = wRegister & DataRegister.getRegister(file);
+        if (destination == 0){
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        // TODO: Zeroflag, Carry, DigitCarry
+    }
+
+    public static void ADDWF(int file, int destination) {
+        int result = wRegister + DataRegister.getRegister(file);
+        if (destination == 0) {
+            wRegister = result;
+        }
+        else {
+            DataRegister.setRegister(file, result);
+        }
+        // TODO: Zeroflag, Carry, DigitCarry
+    }
+
+    public static void SUBLW(int literal) {
+        wRegister = literal - wRegister;
+        // TODO: Zeroflag, Carry, DigitCarry
+    }
+
+    public static void ADDLW(int literal) {
+        wRegister += literal;
+        // TODO: Zeroflag, Carry, DigitCarry
+    }
+
+    public static void RETLW(int literal) {
+        wRegister = literal;
+        //TODO: PC vom Stack holen und laden
+    }
+
+    public static void MOVLW(int literal) {
+        wRegister = literal;
+    }
+
+    public static void BTFSC(int address, int bit) {
+        if (DataRegister.getBit(address, bit) == 0){
+            DataRegister.increasePC();
+        }
+    }
+
+    public static void BTFSS(int address, int bit) {
+        if (DataRegister.getBit(address, bit) == 1){
+            DataRegister.increasePC();
+        }
     }
 }
diff --git a/src/main/java/fabrik/simulator/pic16f84/Controller_FileSelect.java b/src/main/java/fabrik/simulator/pic16f84/Controller_FileSelect.java
index 5aaabc3..7cf24ab 100644
--- a/src/main/java/fabrik/simulator/pic16f84/Controller_FileSelect.java
+++ b/src/main/java/fabrik/simulator/pic16f84/Controller_FileSelect.java
@@ -10,6 +10,7 @@ import javafx.stage.Stage;
 import java.io.File;
 import java.io.IOException;
 import java.util.Arrays;
+import java.util.Scanner;
 
 public class Controller_FileSelect {
     private int [] prog;
@@ -32,9 +33,17 @@ public class Controller_FileSelect {
             stage.setScene(scene);
             stage.show();
             System.out.println("\n");
-            for (int i : prog){
-                if (i!=0) {
-                    Commands.decode(i);
+            DataRegister.initDataRegister();
+            while (true) {
+                Scanner reader = new Scanner(System.in);
+                System.out.println("\nWeiter? ");
+                int n = reader.nextInt();
+                if (n != 0) {
+                    Commands.decode(prog[DataRegister.getPC()]);
+                    System.out.println("\nPC: " + DataRegister.getPC());
+                    System.out.println("W: " + Commands.get_wRegister());
+                    System.out.printf(Arrays.toString(DataRegister.getDataRegister()));
+                    DataRegister.increasePC();
                 }
             }
         }
@@ -43,6 +52,4 @@ public class Controller_FileSelect {
     public int[] getProg() {
         return prog;
     }
-
-
 }
diff --git a/src/main/java/fabrik/simulator/pic16f84/DataRegister.java b/src/main/java/fabrik/simulator/pic16f84/DataRegister.java
index 5f0eaa0..32eb31d 100644
--- a/src/main/java/fabrik/simulator/pic16f84/DataRegister.java
+++ b/src/main/java/fabrik/simulator/pic16f84/DataRegister.java
@@ -3,25 +3,27 @@ package fabrik.simulator.pic16f84;
 import java.util.Arrays;
 
 public class DataRegister {
+    public static final int STATUS = 0x3;
+    public static final int TRISA = 0x85;
+    public static final int TRISB = 0x86;
+    public static final int PCL = 0x2;
+    public static final int RP0 = 0x5;
 
-
-    private static int [] dataRegister =  new int[0xFF];
-
+    private static final int [] dataRegister =  new int[0xFF];
 
     public static void initDataRegister() {
-        dataRegister[0x2] = 0b0;
-        dataRegister[0x3] = 0b00011000;
+        dataRegister[PCL] = 0b0;
+        dataRegister[STATUS] = 0b00011000;
         dataRegister[0xA] = 0b0;
         dataRegister[0xB] = 0b0;
 
         dataRegister[0x81] = 0b11111111;
-        dataRegister[0x82] = 0b0;
-        dataRegister[0x83] = 0b00011000;
-        dataRegister[0x85] = 0b11111000;
-        dataRegister[0x86] = 0b11111111;
-        dataRegister[0x88] = 0b0;
-        dataRegister[0x8A] = 0b0;
-        dataRegister[0x8B] = 0b0;
+        dataRegister[0x82] = dataRegister[PCL];
+        dataRegister[0x83] = dataRegister[STATUS];
+        dataRegister[TRISA] = 0b11111000;
+        dataRegister[TRISB] = 0b11111111;
+        dataRegister[0x8A] = dataRegister[0xA];
+        dataRegister[0x8B] = dataRegister[0xB];
         System.out.println(Arrays.toString(dataRegister));
     }
 
@@ -29,8 +31,55 @@ public class DataRegister {
         return dataRegister;
     }
 
+    private static int bank() {
+        return ((dataRegister[STATUS] >> RP0) & 1) * 0x80;
+    }
+
+    public static int getRegister(int fileAddress){
+        return dataRegister[bank() + fileAddress];
+    }
+
+    public static void setRegister(int fileAddress, int content){
+        dataRegister[bank() + fileAddress] = content;
+    }
+
     public static int getBit(int address, int bit) {
-        return (dataRegister[address] >> bit) & 1;
+        return (dataRegister[bank() + address] >> bit) & 1;
+    }
+
+    public static void clearBit(int address, int bit) {
+        dataRegister[bank() + address] -= (int) Math.pow(2, bit);
+    }
+
+    public static void setBit(int address, int bit) {
+        dataRegister[bank() + address] += (int) Math.pow(2, bit);
+    }
+
+    private static int programCounter = 0;
+
+    private static void writeToPCL(){
+        dataRegister[PCL] = programCounter;
+        dataRegister[0x82] = dataRegister[PCL];
+    }
+
+    public static void increasePC (){
+        programCounter = getRegister(PCL);
+        if (programCounter != 0x3FF) {
+            programCounter++;
+        }
+        else {
+            programCounter = 0;
+        }
+        writeToPCL();
+    }
+
+    public static void setPC (int value){
+        programCounter = value;
+        writeToPCL();
+    }
+
+    public static int getPC(){
+        return programCounter;
     }
 
 }