diff --git a/src/Opcodes.cs b/src/Opcodes.cs
index f68c936..65d9117 100644
--- a/src/Opcodes.cs
+++ b/src/Opcodes.cs
@@ -1,4 +1,5 @@
-using processor.Properties;
+using System;
+using processor.Properties;
 
 namespace processor
 {
@@ -44,15 +45,13 @@ namespace processor
                 case 12:
                     OpC(r, x, y);
                     break;
-                default:
-                    break;
             }
         }
 
         #region Opcode Methods
         private void Op1(int r, int x, int y)
         {
-            lblOpcode.Text = $"0x1";
+            lblOpcode.Text = @"0x1";
             lblOpcodeDesc.Text = Resources._0x1En;
 
             int val = ReadRam(x * 16 + y);
@@ -61,7 +60,7 @@ namespace processor
 
         private void Op2(int r, int x, int y)
         {
-            lblOpcode.Text = $"0x2";
+            lblOpcode.Text = @"0x2";
             lblOpcodeDesc.Text = Resources._0x2En;
             
             int val = x * 16 + y;
@@ -70,64 +69,118 @@ namespace processor
 
         private void Op3(int r, int x, int y)
         {
-            lblOpcode.Text = $"0x3";
+            lblOpcode.Text = @"0x3";
             lblOpcodeDesc.Text = Resources._0x3En;
 
             int val = ReadRegister(r);
             WriteRam(x * 16 + y, val);
         }
 
-        private void Op4(int r, int x, int y)
+        private void Op4(int _, int r, int s)
         {
-            lblOpcode.Text = $"0x4";
+            lblOpcode.Text = @"0x4";
             lblOpcodeDesc.Text = Resources._0x4En;
+            
+            WriteRegister(s, ReadRegister(r));
         }
 
-        private void Op5(int r, int x, int y)
+        private void Op5(int r, int s, int t)
         {
-            lblOpcode.Text = $"0x5";
+            lblOpcode.Text = @"0x5";
             lblOpcodeDesc.Text = Resources._0x5En;
+
+            sbyte result = (sbyte)(Convert.ToSByte(ReadRegister(s)) + Convert.ToSByte(ReadRegister(t)));
+            WriteRegister(r, result);
         }
 
-        private void Op6(int r, int x, int y)
+        private void Op6(int r, int s, int t)
         {
-            lblOpcode.Text = $"0x6";
+            lblOpcode.Text = @"0x6";
             lblOpcodeDesc.Text = Resources._0x6En;
+
+            double storedS = Extensions.CalculateBinFloat(Convert.ToString(ReadRegister(s), 2));
+            double storedT = Extensions.CalculateBinFloat(Convert.ToString(ReadRegister(t), 2));
+            double sum = storedS + storedT;
+            throw new NotImplementedException();
         }
 
-        private void Op7(int r, int x, int y)
+        private void Op7(int r, int s, int t)
         {
-            lblOpcode.Text = $"0x7";
+            lblOpcode.Text = @"0x7";
             lblOpcodeDesc.Text = Resources._0x7En;
+
+            int registerS = ReadRegister(s);
+            int registerT = ReadRegister(t);
+
+            char[] bS = Convert.ToString(registerS, 2).PadLeft(8, '0').ToCharArray();
+            char[] bT = Convert.ToString(registerT, 2).PadLeft(8, '0').ToCharArray();
+            char[] bR = new char[8];
+
+            for (int i = 0; i < 8; i++)
+            {
+                bR[i] = Extensions.BooleanOr(int.Parse(bS[i].ToString()), int.Parse(bT[i].ToString())).ToString()[0];
+            }
+
+            string bRstr = new(bR);
+            WriteRegister(r, Convert.ToInt32(bRstr, 2));
         }
 
-        private void Op8(int r, int x, int y)
+        private void Op8(int r, int s, int t)
         {
-            lblOpcode.Text = $"0x8";
+            lblOpcode.Text = @"0x8";
             lblOpcodeDesc.Text = Resources._0x8En;
+            
+            int registerS = ReadRegister(s);
+            int registerT = ReadRegister(t);
+
+            char[] bS = Convert.ToString(registerS, 2).PadLeft(8, '0').ToCharArray();
+            char[] bT = Convert.ToString(registerT, 2).PadLeft(8, '0').ToCharArray();
+            char[] bR = new char[8];
+
+            for (int i = 0; i < 8; i++)
+            {
+                bR[i] = Extensions.BooleanAnd(int.Parse(bS[i].ToString()), int.Parse(bT[i].ToString())).ToString()[0];
+            }
+
+            string bRstr = new(bR);
+            WriteRegister(r, Convert.ToInt32(bRstr, 2));
         }
 
-        private void Op9(int r, int x, int y)
+        private void Op9(int r, int s, int t)
         {
-            lblOpcode.Text = $"0x9";
+            lblOpcode.Text = @"0x9";
             lblOpcodeDesc.Text = Resources._0x9En;
+            int registerS = ReadRegister(s);
+            int registerT = ReadRegister(t);
+
+            char[] bS = Convert.ToString(registerS, 2).PadLeft(8, '0').ToCharArray();
+            char[] bT = Convert.ToString(registerT, 2).PadLeft(8, '0').ToCharArray();
+            char[] bR = new char[8];
+
+            for (int i = 0; i < 8; i++)
+            {
+                bR[i] = Extensions.BooleanXor(int.Parse(bS[i].ToString()), int.Parse(bT[i].ToString())).ToString()[0];
+            }
+            WriteRegister(r, Convert.ToInt32(new string(bR), 2));
         }
 
         private void OpA(int r, int x, int y)
         {
-            lblOpcode.Text = $"0xA";
+            lblOpcode.Text = @"0xA";
             lblOpcodeDesc.Text = Resources._0xAEn;
+            throw new NotImplementedException();
         }
 
         private void OpB(int r, int x, int y)
         {
-            lblOpcode.Text = $"0xB";
+            lblOpcode.Text = @"0xB";
             lblOpcodeDesc.Text = Resources._0xBEn;
+            throw new NotImplementedException();
         }
 
         private void OpC(int r, int x, int y)
         {
-            lblOpcode.Text = $"0xC";
+            lblOpcode.Text = @"0xC";
             lblOpcodeDesc.Text = Resources._0xCEn;
         }
         #endregion