diff --git a/Arrowgene.Services.Playground/Demo/TcpEchoDemo.cs b/Arrowgene.Services.Playground/Demo/TcpEchoDemo.cs
index 4d0e6ab..cc35ff2 100644
--- a/Arrowgene.Services.Playground/Demo/TcpEchoDemo.cs
+++ b/Arrowgene.Services.Playground/Demo/TcpEchoDemo.cs
@@ -32,6 +32,7 @@ private void LogProviderOnLogWrite(object sender, LogWriteEventArgs logWriteEven
 
         public void Start()
         {
+            
             AsyncEventSettings settings = new AsyncEventSettings();
             _consumer = new BlockingQueueConsumer();
             _server = new AsyncEventServer(IPAddress.IPv6Any, 2345, _consumer,settings);
diff --git a/Arrowgene.Services/Assembly/OpCode.cs b/Arrowgene.Services/Assembly/OpCode.cs
new file mode 100644
index 0000000..0951c0b
--- /dev/null
+++ b/Arrowgene.Services/Assembly/OpCode.cs
@@ -0,0 +1,7 @@
+namespace Arrowgene.Services.Assembly
+{
+    public abstract class OpCode
+    {
+        // https://github.com/libcpu/libcpu/blob/master/arch/x86/x86_decode.cpp
+    }
+}
\ No newline at end of file
diff --git a/Arrowgene.Services/Assembly/X86/ROL.cs b/Arrowgene.Services/Assembly/X86/ROL.cs
new file mode 100644
index 0000000..bbdc336
--- /dev/null
+++ b/Arrowgene.Services/Assembly/X86/ROL.cs
@@ -0,0 +1,19 @@
+using System;
+
+namespace Arrowgene.Services.Assembly.X86
+{
+    public class ROL : OpCode
+    {
+        public static UInt64 RotateLeft(UInt64 x, int n) {
+            return (x << n) | (x >> (64-n));
+        }
+        
+        public static UInt32 RotateLeft(UInt32 x, int n) {
+            return (x << n) | (x >> (32-n));
+        }
+        
+        public static UInt16 RotateLeft(UInt16 x, int n) {
+            return (ushort) ((x << n) | (x >> (16-n)));
+        }
+    }
+}
\ No newline at end of file
diff --git a/Arrowgene.Services/Assembly/X86/ROR.cs b/Arrowgene.Services/Assembly/X86/ROR.cs
new file mode 100644
index 0000000..8c9b782
--- /dev/null
+++ b/Arrowgene.Services/Assembly/X86/ROR.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace Arrowgene.Services.Assembly.X86
+{
+    public class ROR : OpCode
+    {
+        public static UInt64 RotateRight(UInt64 x, int n)
+        {
+            return (x >> n) | (x << (64 - n));
+        }
+
+        public static UInt32 RotateRight(UInt32 x, int n)
+        {
+            return (x >> n) | (x << (32 - n));
+        }
+
+        public static UInt16 RotateRight(UInt16 x, int n)
+        {
+            return (ushort) ((x >> n) | (x << (16 - n)));
+        }
+    }
+}
\ No newline at end of file
diff --git a/services.version b/services.version
index f0df1f7..d9ee657 100644
--- a/services.version
+++ b/services.version
@@ -1 +1 @@
-1.13.2
\ No newline at end of file
+1.13.3
\ No newline at end of file