new file mode 100644
--- /dev/null
+++ b/packages/devs/common/current/src/diag.cxx
@@ -0,0 +1,85 @@
+/*=============================================================================
+//
+//	devs/diag.c
+//
+//	Redirect diag output to the appropriate device
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s): 	proven
+// Contributors:	proven
+// Date:	1998-05-11
+// Purpose:     Kernel diagnostic output
+// Description:	Implementations of kernel diagnostic routines.
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================*/
+
+#include <pkgconf/devices.h>	// Include all the possible devices
+
+/*---------------------------------------------------------------------------*/
+
+#ifdef CYGDBG_INFRA_DIAG_USE_DEVICE
+#if defined(CYG_DEVICE_DIAG_CLASS) && defined(CYG_DEVICE_DIAG_NAME)
+
+extern CYG_DEVICE_DIAG_CLASS CYG_DEVICE_DIAG_NAME;
+
+/*---------------------------------------------------------------------------*/
+/* Write single char to output                                               */
+
+cyg_ucount8 sync_mode = 0;
+
+externC void diag_device_write_char(char c)
+{
+    Cyg_IORB iorb;
+
+    iorb.buffer = &c;
+    iorb.buffer_length = 1;
+    if (sync_mode) {
+	CYG_DEVICE_DIAG_NAME.io_write_assert(&iorb);
+    } else {
+        CYG_DEVICE_DIAG_NAME.io_write_blocking(&iorb);
+    }
+}
+
+externC void diag_device_start_sync()
+{
+    sync_mode = 1;
+}
+
+externC void diag_device_end_sync()
+{
+    sync_mode = 0;
+}
+
+#else
+#error "Must define CYG_DEVICE_DIAG_CLASS and CYG_DEVICE_DIAG_NAME"
+#endif // ! (defined(CYG_DEVICE_DIAG_CLASS) && defined(CYG_DEVICE_DIAG_NAME))
+#endif // CYGDBG_INFRA_DIAG_USE_DEVICE
+
+/*---------------------------------------------------------------------------*/
+/* End of devs/diag.c */