implemented decf Instruction

de/darkress/pic16f84sim/Main.java

@@ -15,11 +15,8 @@ class Main
         int input1 = 0x27FF;
         program.add(CommandDecoder.decode(0x3011)); //Write 0x11 to W
         Memory.setRegister(0x14, 0x01);
-        program.add(CommandDecoder.decode(0x0B94));
-        program.add(CommandDecoder.decode(0x0B94));
-        program.add(CommandDecoder.decode(0x0B94));
-        program.add(CommandDecoder.decode(0x3F05));
-        for(int i = 0; i < program.size(); i++)
+        program.add(CommandDecoder.decode(0x0314));
+        for(int i = 0; i < 2; i++)
         {
             program.get(ProgramCounter.getPc()).execute();
         }

de/darkress/pic16f84sim/commands/Decfsz.java

@@ -1,33 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Decfsz extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Decfsz(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) + 255; // Allow underflow
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result % 256); // Catch underflow
-
-        if((result % 256) == 0)
-        {
-            Nop nop = new Nop();
-            nop.execute();
-        }
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Nop.java

@@ -1,14 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Nop extends LiteralCommandUtils implements Command
-{
-
-    @Override
-    public void execute()
-    {
-        // Do nothing, just increment the PC
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/decoder/CommandDecoder.java

@@ -17,7 +17,8 @@ public class CommandDecoder
             case 0x300:
                 return new Decf(input);
             case 0xB00:
-                return new Decfsz(input);
+                //decfsz();
+                break;
             case 0xA00:
                 //incf();
                 break;
@@ -110,7 +111,7 @@ public class CommandDecoder
 
         if ((input | 0x0060) == 0x0060)
         {
-            return new Nop();
+            //nop();
         }
 
         if (input == 0x0064)