diff --git a/source/Cosmos.HAL2/PciDevice.cs b/source/Cosmos.HAL2/PciDevice.cs
index 572a6c928..6419beceb 100644
--- a/source/Cosmos.HAL2/PciDevice.cs
+++ b/source/Cosmos.HAL2/PciDevice.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -198,6 +198,20 @@ namespace Cosmos.HAL
             WriteRegister16(0x04, command);
         }
 
+        public void EnableBusMaster(bool enable)
+        {
+            UInt16 command = ReadRegister16(0x04);
+
+            UInt16 flags = (1 << 2);
+
+            if (enable)
+                command |= flags;
+            else
+                command &= (ushort)~flags;
+
+            WriteRegister16(0x04, command);
+        }
+
         public class DeviceClass
         {
             public static string GetString(PCIDevice device)
@@ -345,4 +359,4 @@ namespace Cosmos.HAL
             get { return isIO; }
         }
     }
-}
\ No newline at end of file
+}