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diff --git a/InOsEmuPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c b/InOsEmuPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c
new file mode 100644
index 0000000000..aa4e80cf01
--- /dev/null
+++ b/InOsEmuPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c
@@ -0,0 +1,140 @@
+/** @file
+  Serial Port Lib that thunks back to Emulator services to write to StdErr. 
+  All read functions are stubed out. There is no constructor so this lib can 
+  be linked with PEI Core.
+
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+
+#include <PiPei.h>
+#include <Library/SerialPortLib.h>
+#include <Library/PeiServicesLib.h>
+
+#include <Ppi/EmuThunk.h>
+#include <Protocol/EmuThunk.h>
+
+
+
+/**
+  Initialize the serial device hardware.
+  
+  If no initialization is required, then return RETURN_SUCCESS.
+  If the serial device was successfully initialized, then return RETURN_SUCCESS.
+  If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.
+  
+  @retval RETURN_SUCCESS        The serial device was initialized.
+  @retval RETURN_DEVICE_ERROR   The serial device could not be initialized.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortInitialize (
+  VOID
+  )
+{
+  return RETURN_SUCCESS;
+}
+
+/**
+  Write data from buffer to serial device. 
+ 
+  Writes NumberOfBytes data bytes from Buffer to the serial device.  
+  The number of bytes actually written to the serial device is returned.
+  If the return value is less than NumberOfBytes, then the write operation failed.
+  If Buffer is NULL, then ASSERT(). 
+  If NumberOfBytes is zero, then return 0.
+
+  @param  Buffer           The pointer to the data buffer to be written.
+  @param  NumberOfBytes    The number of bytes to written to the serial device.
+
+  @retval 0                NumberOfBytes is 0.
+  @retval >0               The number of bytes written to the serial device.  
+                           If this value is less than NumberOfBytes, then the read operation failed.
+
+**/
+UINTN
+EFIAPI
+SerialPortWrite (
+  IN UINT8     *Buffer,
+  IN UINTN     NumberOfBytes
+  )
+{
+  EMU_THUNK_PPI           *ThunkPpi;
+  EFI_STATUS              Status;
+  EMU_THUNK_PROTOCOL      *Thunk;
+
+  //
+  // Locate EmuThunkPpi for retrieving standard output handle
+  //
+  Status = PeiServicesLocatePpi (
+              &gEmuThunkPpiGuid,
+              0,
+              NULL,
+              (VOID **) &ThunkPpi
+             );
+  if (!EFI_ERROR (Status)) {
+    Thunk  = (EMU_THUNK_PROTOCOL *)ThunkPpi->Thunk ();
+    return Thunk->WriteStdErr (Buffer, NumberOfBytes);
+  }
+  
+  return 0;
+}
+
+
+/**
+  Read data from serial device and save the datas in buffer.
+ 
+  Reads NumberOfBytes data bytes from a serial device into the buffer
+  specified by Buffer. The number of bytes actually read is returned. 
+  If the return value is less than NumberOfBytes, then the rest operation failed.
+  If Buffer is NULL, then ASSERT(). 
+  If NumberOfBytes is zero, then return 0.
+
+  @param  Buffer           The pointer to the data buffer to store the data read from the serial device.
+  @param  NumberOfBytes    The number of bytes which will be read.
+
+  @retval 0                Read data failed; No data is to be read.
+  @retval >0               The actual number of bytes read from serial device.
+
+**/
+UINTN
+EFIAPI
+SerialPortRead (
+  OUT UINT8     *Buffer,
+  IN  UINTN     NumberOfBytes
+  )
+{
+  return 0;
+}
+
+/**
+  Polls a serial device to see if there is any data waiting to be read.
+
+  Polls a serial device to see if there is any data waiting to be read.
+  If there is data waiting to be read from the serial device, then TRUE is returned.
+  If there is no data waiting to be read from the serial device, then FALSE is returned.
+
+  @retval TRUE             Data is waiting to be read from the serial device.
+  @retval FALSE            There is no data waiting to be read from the serial device.
+
+**/
+BOOLEAN
+EFIAPI
+SerialPortPoll (
+  VOID
+  )
+{
+  return FALSE;
+}
+
+