diff --git a/src/NTH/NTH.Tests/BitUtilTests.cs b/src/NTH/NTH.Tests/BitUtilTests.cs
new file mode 100644
index 0000000..3566180
--- /dev/null
+++ b/src/NTH/NTH.Tests/BitUtilTests.cs
@@ -0,0 +1,61 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace NTH.Tests
+{
+    [TestClass]
+    public class BitUtilTests
+    {
+        [TestMethod]
+        public void HiWord()
+        {
+            const int value = 0x12345678;
+            const short expectedValue = 0x1234;
+
+            int expected = value >> 16; // high = 0x1234
+            int actual = BitUtil.HighWord(value);
+
+            Assert.AreEqual(expected, expectedValue);
+            Assert.AreEqual(expected, actual);
+        }
+
+        [TestMethod]
+        public void LoWord()
+        {
+            const int value = 0x12345678;
+            const short expectedValue = 0x5678;
+
+            int expected = value & 0xFFFF; // low = 0x5678
+            int actual = BitUtil.LowWord(value);
+
+            Assert.AreEqual(expected, expectedValue);
+            Assert.AreEqual(expected, actual);
+        }
+
+
+        [TestMethod]
+        public void LoByte()
+        {
+            const short value = 0x1234;
+            const byte expectedValue = 0x34;
+
+            int expected = value & 0xFF; // low = 0x34
+            int actual = BitUtil.LowByte(value);
+
+            Assert.AreEqual(expected, expectedValue);
+            Assert.AreEqual(expected, actual);
+        }
+
+        [TestMethod]
+        public void HiByte()
+        {
+            const short value = 0x1234;
+            const byte expectedValue = 0x12;
+
+            int expected = value >> 8; // low = 0x12
+            int actual = BitUtil.HighByte(value);
+
+            Assert.AreEqual(expected, expectedValue);
+            Assert.AreEqual(expected, actual);
+        }
+    }
+}
diff --git a/src/NTH/NTH.Tests/NTH.Tests.csproj b/src/NTH/NTH.Tests/NTH.Tests.csproj
index 33d367c..5b5dd07 100644
--- a/src/NTH/NTH.Tests/NTH.Tests.csproj
+++ b/src/NTH/NTH.Tests/NTH.Tests.csproj
@@ -69,6 +69,7 @@
   </Choose>
   <ItemGroup>
     <Compile Include="Analysis\DiffFinderTests.cs" />
+    <Compile Include="BitUtilTests.cs" />
     <Compile Include="ByteSizeTests.cs" />
     <Compile Include="EnumExtensionsTest.cs" />
     <Compile Include="MathExTests.cs" />
diff --git a/src/NTH/NTH/BitUtil.cs b/src/NTH/NTH/BitUtil.cs
new file mode 100644
index 0000000..15a343a
--- /dev/null
+++ b/src/NTH/NTH/BitUtil.cs
@@ -0,0 +1,24 @@
+
+namespace NTH
+{
+    public class BitUtil
+    {
+        public static short HighWord(int dword)
+        {
+            return (short)(dword >> 16);
+        }
+        public static short LowWord(int dword)
+        {
+            return (short)(dword & 0x0000FFFF);
+        }
+
+        public static byte HighByte(short word)
+        {
+            return (byte)(word >> 8);
+        }
+        public static byte LowByte(short word)
+        {
+            return (byte)(word & 0x00FF);
+        }
+    }
+}
diff --git a/src/NTH/NTH/NTH-40-client.csproj b/src/NTH/NTH/NTH-40-client.csproj
index 2cda0f1..9d0d944 100644
--- a/src/NTH/NTH/NTH-40-client.csproj
+++ b/src/NTH/NTH/NTH-40-client.csproj
@@ -62,6 +62,7 @@
     <Compile Include="Analysis\Rendering\ConsoleDiffRenderer.cs" />
     <Compile Include="Analysis\Rendering\GenericConsoleDiffRenderer.cs" />
     <Compile Include="Analysis\Rendering\IDiffRenderer.cs" />
+    <Compile Include="BitUtil.cs" />
     <Compile Include="BuildMetadata.cs" />
     <Compile Include="ByteSize.cs" />
     <Compile Include="ByteSizeUnit.cs" />
diff --git a/src/NTH/NTH/NTH.csproj b/src/NTH/NTH/NTH.csproj
index e36581f..2ee7a58 100644
--- a/src/NTH/NTH/NTH.csproj
+++ b/src/NTH/NTH/NTH.csproj
@@ -64,6 +64,7 @@
     <Compile Include="Analysis\Rendering\ConsoleDiffRenderer.cs" />
     <Compile Include="Analysis\Rendering\GenericConsoleDiffRenderer.cs" />
     <Compile Include="Analysis\Rendering\IDiffRenderer.cs" />
+    <Compile Include="BitUtil.cs" />
     <Compile Include="BuildMetadata.cs" />
     <Compile Include="ByteSizeUnit.cs" />
     <Compile Include="ByteSize.cs" />