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diff --git a/ReferenceCode/AcpiTables/Dsdt/NAT_SIO.ASL b/ReferenceCode/AcpiTables/Dsdt/NAT_SIO.ASL
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+/**************************************************************************;
+;*                                                                        *;
+;*    Intel Confidential                                                  *;
+;*                                                                        *;
+;*    Intel Corporation - ACPI Reference Code for the Haswell             *;
+;*    Family of Customer Reference Boards.                                *;
+;*                                                                        *;
+;*                                                                        *;
+;*    Copyright (c)  1999 - 2012 Intel Corporation. All rights reserved   *;
+;*    This software and associated documentation (if any) is furnished    *;
+;*    under a license and may only be used or copied in accordance        *;
+;*    with the terms of the license. Except as permitted by such          *;
+;*    license, no part of this software or documentation may be           *;
+;*    reproduced, stored in a retrieval system, or transmitted in any     *;
+;*    form or by any means without the express written consent of         *;
+;*    Intel Corporation.                                                  *;
+;*                                                                        *;
+;*                                                                        *;
+;**************************************************************************/
+/*++
+  This file contains a 'Sample Driver' and is licensed as such  
+  under the terms of your license agreement with Intel or your  
+  vendor.  This file may be modified by the user, subject to    
+  the additional terms of the license agreement                 
+--*/
+
+
+Device(N393)
+{
+  Name(_HID,EISAID("PNP0A05"))
+
+  Name(_UID,1)
+
+  // Status Method for the National SIO.
+
+  Method(_STA,0,Serialized)
+  {
+    // Only report resources to the OS if the SIO Device is
+    // present on the Docking Board.
+
+    If(NATP)
+    {
+      Return(0x000F)
+    }
+
+    Return(0x0000)
+  }
+
+  // Define the SIO Index/Data Registers as an ACPI Operating
+  // Region.  These registers will be used communicate to the SIO.
+
+  OperationRegion(N393, SystemIO, 0x02E, 0x02)
+  Field(N393, ByteAcc, Lock, Preserve)
+  {
+    INDX, 8,
+    DATA, 8
+  }
+
+  // Use ACPI Defined IndexField so consecutive Index/Data I/Os are
+  // assured to be uninterrupted.
+
+  IndexField(INDX, DATA, ByteAcc, Lock, Preserve)
+  {
+    Offset(0x07), // Logical Device Number.
+    R07H, 8,
+    Offset(0x20), // SIO Configuration and ID.
+    R20H, 8,
+    R21H, 8,
+    R22H, 8,
+    R23H, 8,
+    R24H, 8,
+    R25H, 8,
+    R26H, 8,
+    R27H, 8,
+    R28H, 8,
+    R29H, 8,
+    R2AH, 8,
+    Offset(0x30), // Logical Device Activate.
+    R30H, 8,
+    Offset(0x60), // I/O Space Configuration.
+    R60H, 8,
+    R61H, 8,
+    Offset(0x70), // Interrupt Configuration.
+    R70H, 8,
+    R71H, 8,
+    Offset(0x74), // DMA Configuration.
+    R74H, 8,
+    R75H, 8,
+    Offset(0xF0), // Special Logical Device Configuration.
+    RF0H, 8,
+    RF1H, 8
+  }
+
+  Include ("NAT_COM.ASL")
+  Include ("NAT_LPT.ASL")
+}