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diff --git a/common/words.h b/common/words.h
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+
+/**************************************************************************
+ *
+ *  $Id: words.h 1.9 2003/02/07 11:36:54Z MARTIN TRASH $
+ *
+ *  Copyright (c) Meinberg Funkuhren, Bad Pyrmont, Germany
+ *
+ *  Description:
+ *    Definitions of commonly used data types.
+ *
+ * -----------------------------------------------------------------------
+ *  $Log: words.h $
+ *  Revision 1.9  2003/02/07 11:36:54Z  MARTIN
+ *  New macros _hilo_16() and _hilo_32() for endian conversion.
+ *  Revision 1.8  2002/05/28 10:09:54  MARTIN
+ *  Added new macros _var_bswap16() and _var_bswap32().
+ *  Revision 1.7  2001/03/14 11:30:48  MARTIN
+ *  Removed definitions for UINT8, UINT16, UINT32.
+ *  Redefined preprocessor control for Win32.
+ *  Revision 1.6  2001/02/28 15:43:20  MARTIN
+ *  Modified preprocessor syntax.
+ *  Revision 1.5  2001/02/05 10:20:53  MARTIN
+ *  Include different Linux types for user space and kernel space programs.
+ *  Source code cleanup.
+ *  Revision 1.4  2000/09/15 08:34:11  MARTIN
+ *  Exclude some definitions if compiling under Win NT.
+ *  Revision 1.3  2000/08/22 15:04:28  MARTIN
+ *  Added new file header.
+ *  Added macros to revert endianess of 16 and 32 bit values.
+ *
+ **************************************************************************/
+
+#ifndef _WORDS_H
+#define _WORDS_H
+
+
+/* Other headers to be included */
+
+#ifdef _WORDS
+ #define _ext
+#else
+ #define _ext extern
+#endif
+
+
+/* Start of header body */
+
+typedef unsigned char uchar;
+
+#if defined( __linux )
+  #ifdef __KERNEL__
+    #include <linux/types.h>
+  #else
+    #include <sys/types.h>
+  #endif
+#else
+  typedef unsigned short ushort;
+  typedef unsigned int uint;
+  typedef unsigned long ulong;
+#endif
+
+typedef double udouble;
+
+typedef unsigned char byte;
+typedef unsigned short word;
+typedef unsigned long longword;
+typedef unsigned long dword;
+
+
+#if !defined( __OS2__ ) && !defined( _Windows ) && \
+    !defined( _WIN32 ) && !defined( __WIN32__ )
+
+  #ifndef BYTE
+    #define BYTE unsigned char
+  #endif
+
+  #ifndef WORD
+    #define WORD unsigned short
+  #endif
+
+  #ifndef LONG
+    #define LONG unsigned long
+  #endif
+
+  #ifndef LONGWORD
+    #define LONGWORD longword
+  #endif
+#endif
+
+
+// a macro to swap the byte order of a 16 bit value
+#define _bswap16( _x )                      \
+(                                           \
+  ( ( ( (ushort) (_x) ) & 0x00FF ) << 8 ) | \
+  ( ( ( (ushort) (_x) ) & 0xFF00 ) >> 8 )   \
+)
+
+// a macro to swap the byte order of a 32 bit value
+#define _bswap32( _x )                            \
+(                                                 \
+  ( ( ( (ulong) (_x) ) & 0x000000FFUL ) << 24 ) | \
+  ( ( ( (ulong) (_x) ) & 0x0000FF00UL ) << 8 )  | \
+  ( ( ( (ulong) (_x) ) & 0x00FF0000UL ) >> 8 )  | \
+  ( ( ( (ulong) (_x) ) & 0xFF000000UL ) >> 24 )   \
+)
+
+#define _var_bswap16( _v )   (_v) = _bswap16( _v )
+#define _var_bswap32( _v )   (_v) = _bswap32( _v )
+
+
+// The C51 compiler is big-endian, that means the most
+// significant byte of a 16 or 32 bit value is stored in
+// the lowest memory location. Most other systems are
+// little-endian, so we must use macros to adjust the
+// byte order if the C51 is used.
+
+#if defined _CC51
+  #define _hilo_16( _x )  _bswap16( _x )
+  #define _hilo_32( _x )  _bswap32( _x )
+#else
+  #define _hilo_16( _x )  (_x)
+  #define _hilo_32( _x )  (_x)
+#endif
+
+
+
+/* End of header body */
+
+#undef _ext
+
+#endif  /* _WORDS_H */