implemented Clrw instruction

de/darkress/pic16f84sim/Main.java

@@ -12,12 +12,8 @@ class Main
     public static void main(String[] args) {
 
         ArrayList<Command> program = new ArrayList<>();
-        int input1 = 0x27FF;
-        program.add(CommandDecoder.decode(0x3011)); //Write 0x11 to W
-        Memory.setRegister(0x14, 0xFE);
-        program.add(CommandDecoder.decode(0x0F94)); //Write 0x11 to W
-        program.add(CommandDecoder.decode(0x0F94)); //Write 0x11 to W
-        program.add(CommandDecoder.decode(0x0F94)); //Write 0x11 to W
+        Memory.workingRegister = 0x10;
+        program.add(CommandDecoder.decode(0x123)); //Write 0x11 to W
         for(int i = 0; i < program.size(); i++)
         {
             program.get(ProgramCounter.getPc()).execute();

de/darkress/pic16f84sim/commands/Clrw.java

@@ -0,0 +1,18 @@
+package de.darkress.pic16f84sim.commands;
+
+import de.darkress.pic16f84sim.microcontroller.Memory;
+import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
+
+public class Clrw extends FileRegisterCommandUtils implements Command
+{
+    @Override
+    public void execute()
+    {
+        final int result = 0;
+
+        checkZeroBit(result);
+
+        Memory.workingRegister = result;
+        ProgramCounter.incPC();
+    }
+}

de/darkress/pic16f84sim/decoder/CommandDecoder.java

@@ -57,8 +57,7 @@ public class CommandDecoder
                 //clrf();
                 break;
             case 0x100:
-                //clrw();
-                break;
+                return new Clrw();
             case 0x80:
                 //movwf();
                 break;