diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 30065082c7..3d512f880b 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -1,3 +1,15 @@
+19990914-20:45 EDT David G. Holm <dholm@jsd-llc.com>
+  + config/win32/mingw32.cf
+  * source/hbpp/hbpp.c
+  * source/hbpp/hbppint.c
+  * source/rtl/console.c
+  * source/rtl/dir.c
+  * source/rtl/environ.c
+  * source/rtl/filesys.c
+  * source/rtl/inkey.c
+  * source/rtl/tone.c
+    + Added __MINGW32__ support for Cygnus GCC compiler.
+
 19990916-02:25 GMT+1 Victor Szel <info@szelvesz.hu>
 
   * source/compiler/symbols.asm (removed)
diff --git a/harbour/config/win32/mingw32.cf b/harbour/config/win32/mingw32.cf
new file mode 100644
index 0000000000..1e708aadd6
--- /dev/null
+++ b/harbour/config/win32/mingw32.cf
@@ -0,0 +1,52 @@
+#
+# $Id$
+#
+
+include $(TOP)$(ROOT)config/$(HB_ARCHITECTURE)/global.cf
+
+OBJ_EXT = .o
+EXE_EXT = .exe
+LIB_PREF = lib
+LIB_EXT = .a
+
+CC = gcc
+CC_IN = -c
+CC_OUT = -o
+CPPFLAGS = -DDEBUG -I. -I$(HB_INC_COMPILE) -mno-cygwin
+CFLAGS = -Wall -g
+
+LD = gcc
+LD_OUT = -o
+
+# Add all libraries specified in LIBS.
+ifeq ($(HB_LIB_COMPILE),)
+LINKPATHS += $(foreach lib, $(LIBS), -L$(TOP)$(ROOT)source/$(lib)/$(ARCH))
+else
+LINKPATHS += -L$(HB_LIB_COMPILE)
+endif
+
+# The -( option could be appropriate to link against libraries with
+# cyclic dependencies, but I think it is not really necessary if the
+# libraries are kept in proper order.
+# LINKLIBS += -Wl,-(
+
+LINKLIBS += $(foreach lib, $(LIBS), -l$(lib))
+
+# If LIBS specifies the rdd library, add all DB drivers.
+ifeq ($(findstring rdd,$(LIBS)),rdd)
+LINKPATHS += $(foreach drv, $(HB_DB_DRIVERS), -L$(TOP)$(ROOT)source/rdd/$(drv)/$(ARCH))
+LINKLIBS += $(foreach drv, $(HB_DB_DRIVERS), -l$(drv))
+endif
+
+# The -) option could be appropriate to link against libraries with
+# cyclic dependencies, but I think it is not really necessary if the
+# libraries are kept in proper order.
+# LINKLIBS += -Wl,-)
+
+LDFLAGS = $(LINKPATHS) -mno-cygwin
+
+AR = ar
+ARFLAGS =
+AR_RULE = $(AR) $(ARFLAGS) r $@ $^ || $(RM) $@
+
+include $(TOP)$(ROOT)config/rules.cf
diff --git a/harbour/source/hbpp/hbpp.c b/harbour/source/hbpp/hbpp.c
index 39ad297d1f..87fed3d089 100644
--- a/harbour/source/hbpp/hbpp.c
+++ b/harbour/source/hbpp/hbpp.c
@@ -34,7 +34,7 @@
  */
 
 #include <stdlib.h>
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ! defined(__MINGW32__)
  #include <string.h>
  #include <unistd.h>
 #else
diff --git a/harbour/source/hbpp/hbppint.c b/harbour/source/hbpp/hbppint.c
index 3882742077..c4a8d629c8 100644
--- a/harbour/source/hbpp/hbppint.c
+++ b/harbour/source/hbpp/hbppint.c
@@ -34,17 +34,15 @@
    their web site at http://www.gnu.org/).
  */
 
-#if defined(__GNUC__) || defined(__WATCOMC__)
+#if ( defined(__GNUC__) || defined(__WATCOMC__) ) && ! defined(__MINGW32__)
  #include <string.h>
  #include <stdlib.h>
-#else
- #if ( defined(_MSC_VER) || defined(__IBMCPP__) )
+#elif ( defined(_MSC_VER) || defined(__IBMCPP__) )
   #include <memory.h>
   #include <stdlib.h>
- #else
+#else
   #include <alloc.h>
   #include <mem.h>
- #endif
 #endif
 #include <stdio.h>
 #include "hbpp.h"
diff --git a/harbour/source/rtl/console.c b/harbour/source/rtl/console.c
index 8423b35e80..49593c2b95 100644
--- a/harbour/source/rtl/console.c
+++ b/harbour/source/rtl/console.c
@@ -69,7 +69,7 @@
 #include "gtapi.h"            /* HARBOUR_USE_GTAPI is checked inside gtapi.h, so that
                                  we can always get the border styles */
 
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ! defined(__MINGW32__)
    #include <unistd.h>
    #if defined(__DJGPP__) || defined(__CYGWIN__) || defined(HARBOUR_GCC_OS2)
       #include <io.h>
diff --git a/harbour/source/rtl/dir.c b/harbour/source/rtl/dir.c
index b7560b6be1..2357a9e05a 100644
--- a/harbour/source/rtl/dir.c
+++ b/harbour/source/rtl/dir.c
@@ -7,6 +7,7 @@
  *         by the optional file and attribute mask.
  *
  * Latest mods:
+ * 1.49   19990915   dholm     Added __MINGW32__ support
  * 1.46   19990915   ptucker   Return results are now fully compatible
  *                             particularly using MSVC - other os's need
  *                             testing.
@@ -69,9 +70,12 @@
    #define INCL_DOSERRORS
 #endif
 
-#if defined(_MSC_VER)
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
+#if defined(_MSC_VER) || defined(__MINGW32__)
+   #define WIN32_LEAN_AND_MEAN
+   #include <windows.h>
+   #if defined(__MINGW32__)
+      #define HB_DONT_DEFINE_BASIC_TYPES
+   #endif
 #endif
 
 #include <ctype.h>
@@ -79,7 +83,7 @@
 #include "itemapi.h"
 #include "directry.ch"
 
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ! defined(__MINGW32__)
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>
@@ -102,7 +106,7 @@
    #include <time.h>
 #endif
 
-#if defined(__WATCOMC__) || defined(_MSC_VER)
+#if defined(__WATCOMC__) || defined(_MSC_VER) || defined(__MINGW32__)
    #include <sys/stat.h>
    #include <share.h>
    #include <fcntl.h>
@@ -285,7 +289,7 @@ static USHORT osAttributesToMask( BYTE * byAttrib )
 #else
    #if defined(__IBMCPP__)
    #else
-      #if defined(_MSC_VER)
+      #if defined(_MSC_VER) || defined(__MINGW32__)
       #elif defined(__BORLANDC__) || defined(__DJGPP__)
       #else
       #endif
@@ -305,7 +309,7 @@ static BYTE * osMaskToAttributes( USHORT usMask, BYTE * byAttrib )
 #else
    #if defined(__IBMCPP__)
    #else
-      #if defined(_MSC_VER)
+      #if defined(_MSC_VER) || defined(__MINGW32__)
       #elif defined(__BORLANDC__) || defined(__DJGPP__)
       #else
       #endif
@@ -432,7 +436,7 @@ HARBOUR HB_DIRECTORY( void )
    struct stat statbuf;
    struct tm * ft;
 
-#if defined(_MSC_VER )
+#if defined(_MSC_VER ) || defined(__MINGW32__)
    struct _finddata_t entry;
    long hFile;
 #elif defined(__IBMCPP__)
@@ -541,7 +545,7 @@ HARBOUR HB_DIRECTORY( void )
    tzset();
    pDir = hb_itemArrayNew( 0 );
 
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) || defined(__MINGW32__)
 
    strcpy( string, dirname );
    strcat( string, pattern );
@@ -624,7 +628,7 @@ HARBOUR HB_DIRECTORY( void )
       {
          attrib = 0;
 
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) || defined(__MINGW32__)
          /* due to short-name support: reconstruct the filename */
          if( bEightDotThree )
          {
@@ -672,7 +676,7 @@ HARBOUR HB_DIRECTORY( void )
                #if defined(__IBMCPP__)
                   attrib = entry.attrFile;
                #else
-                  #if defined(_MSC_VER)
+                  #if defined(_MSC_VER) || defined(__MINGW32__)
                      attrib = entry.attrib;
                      if( bEightDotThree )
                      {
@@ -750,7 +754,7 @@ HARBOUR HB_DIRECTORY( void )
          }
       }
    }
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) || defined(__MINGW32__)
    while( _findnext( hFile, &entry ) == 0 );
    _findclose( hFile );
 #elif defined(__IBMCPP__)
@@ -763,7 +767,7 @@ HARBOUR HB_DIRECTORY( void )
    hb_itemReturn( pDir ); /* DIRECTORY() returns an array */
    hb_itemRelease( pDir );
 
-#if defined(_MSC_VER) || defined(__IBMCPP__)
+#if defined(_MSC_VER) || defined(__IBMCPP__) || defined(__MINGW32__)
 
    }
 #endif
diff --git a/harbour/source/rtl/environ.c b/harbour/source/rtl/environ.c
index 6a40548df7..5125361a58 100644
--- a/harbour/source/rtl/environ.c
+++ b/harbour/source/rtl/environ.c
@@ -19,10 +19,13 @@
 /* NOTE: The following #ifdef block #including <windows.h> must
          be ahead of any and all #include statements! */
 
-#if defined(_Windows) || defined(_WIN32)
+#if defined(_Windows) || defined(_WIN32) || defined(__MINGW32__)
    #if !defined(__CYGWIN__)
       #define WIN32_LEAN_AND_MEAN
       #include <windows.h>
+      #if defined(__MINGW32__)
+         #define HB_DONT_DEFINE_BASIC_TYPES
+      #endif
    #endif
 #endif
 
@@ -30,12 +33,12 @@
 #include "errorapi.h"
 #include "hbver.h"
 
-#if defined(__TURBOC__) || defined(__BORLANDC__) || defined(__MSC__) || defined(_MSC_VER) || defined(__DJGPP__)
+#if defined(__TURBOC__) || defined(__BORLANDC__) || defined(__MSC__) || defined(_MSC_VER) || defined(__DJGPP__) || defined(__MINGW32__)
    #include <dos.h>
    #include <stdlib.h>
 #endif
 
-#if defined(__GNUC__) && !defined(__DJGPP__)
+#if defined(__GNUC__) && !defined(__DJGPP__) && ! defined(__MINGW32__)
    #include <sys/utsname.h>
 #endif
 
@@ -79,7 +82,7 @@ HARBOUR HB_OS( void )
 
 #else
 
-#if defined(__GNUC__) && !defined(__DJGPP__)
+#if defined(__GNUC__) && !defined(__DJGPP__) && !defined(__MINGW32__)
 
    struct utsname un;
 
@@ -97,9 +100,9 @@ HARBOUR HB_OS( void )
 #else
 
 /* TODO: add MSVC support but MSVC cannot detect any OS except Windows! */
-#if defined(__TURBOC__) || defined(__BORLANDC__) || defined(__MSC__) || defined(_MSC_VER)
+#if defined(__TURBOC__) || defined(__BORLANDC__) || defined(__MSC__) || defined(_MSC_VER) || defined(__MINGW32__)
 
-#if defined(_Windows) || defined(_WIN32)
+#if defined(_Windows) || defined(_WIN32) || defined(__MINGW32__)
 
 /* NOTE: Support for determining the window version by Luiz Rafael Culik
    Culik@sl.conex.net
@@ -297,7 +300,7 @@ HARBOUR HB_GETENV( void )
 
 HARBOUR HB___RUN( void )
 {
-#if defined(__TURBOC__) || defined(__BORLANDC__)  || defined(__DJGPP__) || defined(__MSC__) || defined(_MSC_VER) || defined(__IBMCPP__) || defined(HARBOUR_GCC_OS2) || defined(__CYGWIN__)
+#if defined(__TURBOC__) || defined(__BORLANDC__)  || defined(__DJGPP__) || defined(__MSC__) || defined(_MSC_VER) || defined(__IBMCPP__) || defined(HARBOUR_GCC_OS2) || defined(__CYGWIN__) || defined(__MINGW32__)
    if( ISCHAR( 1 ) )
       system( hb_parc( 1 ) );
 #else
diff --git a/harbour/source/rtl/filesys.c b/harbour/source/rtl/filesys.c
index 4801818189..1f1bf44f9c 100644
--- a/harbour/source/rtl/filesys.c
+++ b/harbour/source/rtl/filesys.c
@@ -46,7 +46,7 @@
    #include <io.h>
 #endif
 
-#if defined(__GNUC__)
+#if defined(__GNUC__) && !defined(__MINGW32__)
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <unistd.h>
@@ -80,7 +80,7 @@
    #endif
 #endif
 
-#if defined(__BORLANDC__) || defined(__IBMCPP__) || defined(_MSC_VER)
+#if defined(__BORLANDC__) || defined(__IBMCPP__) || defined(_MSC_VER) || defined(__MINGW32__)
    #include <sys\stat.h>
    #include <io.h>
    #include <fcntl.h>
@@ -90,7 +90,7 @@
       #include <dir.h>
    #endif
 
-   #if defined(_MSC_VER)
+   #if defined(_MSC_VER) || defined(__MINGW32__)
       #include <sys\locking.h>
    #else
       #if !defined(HAVE_POSIX_IO)
@@ -163,7 +163,7 @@ extern int rename( const char *, const char * );
 
 /* Convert HARBOUR flags to IO subsystem flags */
 
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
 static int convert_open_flags( USHORT uiFlags )
 {
@@ -173,7 +173,7 @@ static int convert_open_flags( USHORT uiFlags )
    result_flags |= O_BINARY;
 /* DEBUG: printf("\nconvert_open_flags: O_BINARY"); */
 
-#if defined( _MSC_VER )
+#if defined( _MSC_VER ) || defined(__MINGW32__)
    if( uiFlags == 0 )
    {
       result_flags |= O_RDONLY;
@@ -201,7 +201,7 @@ static int convert_open_flags( USHORT uiFlags )
 /* DEBUG: printf(" O_RDWR"); */
    }
 
-#if ! defined(_MSC_VER)
+#if ! defined(_MSC_VER) && ! defined(__MINGW32__)
    /* shared flags */
    if( ( uiFlags & FO_DENYREAD ) == FO_DENYREAD )
    {
@@ -292,9 +292,7 @@ FHANDLE hb_fsOpen( BYTE * pFilename, USHORT uiFlags )
    hFileHandle = open( ( char * ) pFilename, convert_open_flags( uiFlags ) );
    s_uiErrorLast = errno;
 
-#else
-
-   #if defined(_MSC_VER)
+#elif defined(_MSC_VER)
 
       int iShare = _SH_DENYNO;
 
@@ -314,13 +312,31 @@ FHANDLE hb_fsOpen( BYTE * pFilename, USHORT uiFlags )
          hFileHandle = _open( ( char * ) pFilename, convert_open_flags( uiFlags ) );
       s_uiErrorLast = errno;
 
-   #else
+#elif defined(__MINGW32__)
+
+      int iShare = SH_DENYNO;
+
+      if( ( uiFlags & FO_DENYREAD ) == FO_DENYREAD )
+         iShare = SH_DENYRD;
+
+      else if( uiFlags & FO_EXCLUSIVE )
+         iShare = SH_DENYRW;
+
+      else if( uiFlags & FO_DENYWRITE )
+         iShare = SH_DENYWR;
+
+      errno = 0;
+      if( iShare )
+         hFileHandle = sopen( ( char * ) pFilename, convert_open_flags( uiFlags ), iShare );
+      else
+         hFileHandle = open( ( char * ) pFilename, convert_open_flags( uiFlags ) );
+      s_uiErrorLast = errno;
+
+#else
 
       hFileHandle = FS_ERROR;
       s_uiErrorLast = FS_ERROR;
 
-   #endif
-
 #endif
 
    return hFileHandle;
@@ -334,7 +350,7 @@ FHANDLE hb_fsCreate( BYTE * pFilename, USHORT uiFlags )
 
    s_uiErrorLast = 0;
 
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    convert_create_flags( uiFlags, &oflag, &pmode );
@@ -359,7 +375,7 @@ FHANDLE hb_fsCreate( BYTE * pFilename, USHORT uiFlags )
 
 void    hb_fsClose( FHANDLE hFileHandle )
 {
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    close( hFileHandle );
@@ -395,7 +411,7 @@ void    hb_fsSetDevMode( FHANDLE hFileHandle, USHORT uiDevMode )
    }
    s_uiErrorLast = errno;
 
-#elif defined(_MSC_VER)
+#elif defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    switch( uiDevMode )
@@ -422,7 +438,7 @@ USHORT  hb_fsRead( FHANDLE hFileHandle, BYTE * pBuff, USHORT uiCount )
 {
    USHORT uiRead;
 
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    uiRead = read( hFileHandle, pBuff, uiCount );
@@ -444,7 +460,7 @@ USHORT  hb_fsWrite( FHANDLE hFileHandle, BYTE * pBuff, USHORT uiCount )
 {
    USHORT uiWritten;
 
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    uiWritten = write( hFileHandle, pBuff, uiCount );
@@ -466,7 +482,7 @@ ULONG   hb_fsReadLarge( FHANDLE hFileHandle, BYTE * pBuff, ULONG ulCount )
 {
    ULONG ulReadTotal = 0;
 
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    while( ulReadTotal < ulCount )
@@ -497,7 +513,7 @@ ULONG   hb_fsWriteLarge( FHANDLE hFileHandle, BYTE * pBuff, ULONG ulCount )
 {
    ULONG ulWrittenTotal = 0;
 
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    while( ulWrittenTotal < ulCount )
@@ -534,7 +550,7 @@ ULONG   hb_fsSeek( FHANDLE hFileHandle, LONG lOffset, USHORT uiFlags )
       /* 'Seek Error' */
       s_uiErrorLast = 25;
 
-   #if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+   #if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
       /* get current offset */
       errno = 0;
       ulPos = lseek( hFileHandle, 0, SEEK_CUR );
@@ -547,7 +563,7 @@ ULONG   hb_fsSeek( FHANDLE hFileHandle, LONG lOffset, USHORT uiFlags )
    else
    {
 
-   #if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+   #if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
       errno = 0;
       ulPos = lseek( hFileHandle, lOffset, Flags );
@@ -591,7 +607,7 @@ int     hb_fsDelete( BYTE * pFilename )
 
 #else
 
-   #if defined(_MSC_VER)
+   #if defined(_MSC_VER) || defined(__MINGW32__)
 
       errno = 0;
       iResult = remove( ( char * ) pFilename );
@@ -613,7 +629,7 @@ int hb_fsRename( BYTE * pOldName, BYTE * pNewName )
 {
    int iResult;
 
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    errno = 0;
    iResult = rename( ( char * ) pOldName, ( char * ) pNewName );
@@ -634,7 +650,7 @@ BOOL    hb_fsLock   ( FHANDLE hFileHandle, ULONG ulStart,
 {
    int iResult = 0;
 
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) || defined(__MINGW32__)
    ULONG ulOldPos;
 #endif
 
@@ -653,9 +669,7 @@ BOOL    hb_fsLock   ( FHANDLE hFileHandle, ULONG ulStart,
    }
    s_uiErrorLast = errno;
 
-#else
-
-#if defined(_MSC_VER)
+#elif defined(_MSC_VER)
 
    ulOldPos = hb_fsSeek( hFileHandle, ulStart, FS_SET );
 
@@ -672,13 +686,28 @@ BOOL    hb_fsLock   ( FHANDLE hFileHandle, ULONG ulStart,
 
    hb_fsSeek( hFileHandle, ulOldPos, FS_SET );
 
+#elif defined(__MINGW32__)
+
+   ulOldPos = hb_fsSeek( hFileHandle, ulStart, FS_SET );
+
+   switch( uiMode )
+   {
+      case FL_LOCK:
+         iResult = _locking( hFileHandle, _LK_LOCK, ulLength );
+         break;
+
+      case FL_UNLOCK:
+         iResult = _locking( hFileHandle, _LK_UNLOCK, ulLength );
+         break;
+   }
+
+   hb_fsSeek( hFileHandle, ulOldPos, FS_SET );
+
 #else
 
    iResult = 1;
    s_uiErrorLast = FS_ERROR;
 
-#endif
-
 #endif
 
    return ( iResult ? FALSE : TRUE );
@@ -686,7 +715,7 @@ BOOL    hb_fsLock   ( FHANDLE hFileHandle, ULONG ulStart,
 
 void    hb_fsCommit( FHANDLE hFileHandle )
 {
-#if defined(HAVE_POSIX_IO) || defined(_MSC_VER)
+#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
 
    int dup_handle;
 
@@ -801,7 +830,7 @@ USHORT  hb_fsChDrv( BYTE nDrive )
 {
    USHORT uiResult;
 
-#if defined(HAVE_POSIX_IO) && ( defined(OS2) || defined(DOS) || defined(_Windows) ) && ! defined(__CYGWIN__)
+#if defined(HAVE_POSIX_IO) && ( defined(OS2) || defined(DOS) || defined(_Windows) || defined(__MINGW32__) ) && ! defined(__CYGWIN__)
 
    USHORT uiSave = _getdrive();
 
@@ -831,7 +860,7 @@ BYTE    hb_fsCurDrv( void )
 {
    USHORT uiResult;
 
-#if defined(HAVE_POSIX_IO) && ( defined(OS2) || defined(DOS) || defined(_Windows) ) && ! defined(__CYGWIN__)
+#if defined(HAVE_POSIX_IO) && ( defined(OS2) || defined(DOS) || defined(_Windows) || defined(__MINGW32__) ) && ! defined(__CYGWIN__)
 
    errno = 0;
    uiResult = _getdrive();
@@ -851,7 +880,7 @@ USHORT  hb_fsIsDrv( BYTE nDrive )
 {
    USHORT uiResult;
 
-#if defined(HAVE_POSIX_IO) && ( defined(OS2) || defined(DOS) || defined(_Windows) ) && ! defined(__CYGWIN__)
+#if defined(HAVE_POSIX_IO) && ( defined(OS2) || defined(DOS) || defined(_Windows) || defined(__MINGW32__) ) && ! defined(__CYGWIN__)
 
    USHORT uiSave = _getdrive();
 
diff --git a/harbour/source/rtl/inkey.c b/harbour/source/rtl/inkey.c
index b396708270..00b0ffb468 100644
--- a/harbour/source/rtl/inkey.c
+++ b/harbour/source/rtl/inkey.c
@@ -32,6 +32,7 @@
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
    their web site at http://www.gnu.org/).
 
+   V 1.36   David G. Holm               Added __MINGW32__ support
    V 1.35   David G. Holm               Changed the __CYGWIN__ build to use
                                         the Unix keyboard input method and
                                         modified it to not block the VM.
@@ -70,7 +71,7 @@
 #include "inkey.h"
 #include "init.h"
 
-#if defined(__TURBOC__) || defined(__BORLANDC__) || defined(__MSC__) || defined(_MSC_VER)
+#if defined(__TURBOC__) || defined(__BORLANDC__) || defined(__MSC__) || defined(_MSC_VER) || defined(__MINGW32__)
    #include <conio.h>
    #include <dos.h>
 #elif  defined(__DJGPP__)
@@ -145,7 +146,7 @@ static HB_inkey_enum s_eventmask;
 void hb_releaseCPU( void )
 {
 /* TODO: Add code to release time slices on all platforms */
-#if defined(_Windows)
+#if defined(_Windows) || defined(__MINGW32__)
    /* according to ms docs, you should not do this in a Win app. dos only */
 #elif defined(OS2)
    DosSleep( 25 ); /* Duration is in milliseconds */
@@ -218,7 +219,8 @@ int hb_inkeyGet( void )       /* Extract the next key from the keyboard buffer *
       non-blocking Unix-style keyboard input is implemented */
    char ch;
    read( STDIN_FILENO, &ch, 1 );
-   key = ch;
+   if( ch == '\n' ) key = '\r';
+   else key = ch;
 #else
    hb_inkeyPoll();
    if( hb_set.HB_SET_TYPEAHEAD )
@@ -267,7 +269,7 @@ void hb_inkeyPoll( void )     /* Poll the console keyboard to stuff the Harbour
    if( hb_set.HB_SET_TYPEAHEAD || s_inkeyPoll )
    {
       int ch = 0;
-#if ( defined(OS_DOS_COMPATIBLE) || defined(HARBOUR_GCC_OS2) || defined(__IBMCPP__) || defined(_Windows) ) && ! defined(__CYGWIN__)
+#if ( defined(OS_DOS_COMPATIBLE) || defined(HARBOUR_GCC_OS2) || defined(__IBMCPP__) || defined(_Windows) || defined(__MINGW32__) ) && ! defined(__CYGWIN__)
    /* The reason for including _Windows here is that kbhit() and getch() appear
      to work properly in console mode. For true Windows mode, changes are needed. */
    #if defined(HARBOUR_GCC_OS2)
diff --git a/harbour/source/rtl/tone.c b/harbour/source/rtl/tone.c
index 7c4a9fbe2b..43f4d3f5e3 100644
--- a/harbour/source/rtl/tone.c
+++ b/harbour/source/rtl/tone.c
@@ -30,6 +30,7 @@
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
    their web site at http://www.gnu.org/).
 
+   V 1.10   David G. Holm               Added __MINGW32__ support
    V 1.8    David G. Holm               Added '&& ! defined(_Windows)'
                                         check to all __BORLANDC__ checks.
    V 1.6    David G. Holm               Added Win32 Beep(), thanks to
@@ -53,6 +54,8 @@
    #include <pc.h>
    #include <time.h>
 #elif defined(_Windows)
+#elif defined(__MINGW32__)
+   #include <stdlib.h>
 #elif defined(__BORLANDC__)
    #include <dos.h>
    #include <time.h>
@@ -133,7 +136,7 @@ void hb_tone( double frequency, double duration )
    ULONG temp;
 #elif defined(WINNT) || defined(_Windows)
    ULONG temp;
-#elif defined(OS2)
+#elif defined(OS2) || defined(__MINGW32__)
    USHORT temp;
 #elif defined(__DJGPP__) || defined(__BORLANDC__)
    USHORT temp; /* Use USHORT, because this variable gets added to clock()
@@ -144,7 +147,7 @@ void hb_tone( double frequency, double duration )
    ULONG temp;    /* Avoid unreferenced temp */
    duration = -1; /* Exit without delay */
 #endif
-#if defined(HARBOUR_GCC_OS2) || defined(OS2) || defined(WINNT) || defined(_Windows)
+#if defined(HARBOUR_GCC_OS2) || defined(OS2) || defined(WINNT) || defined(_Windows) || defined(__MINGW32__)
    frequency = MIN( MAX( 0.0, frequency ), 32767.0 );
    duration = duration * 1000.0 / 18.2; /* milliseconds */
 #elif defined(__DJGPP) || defined(__BORLANDC__)
@@ -160,7 +163,7 @@ void hb_tone( double frequency, double duration )
    {
 #if defined(HARBOUR_GCC_OS2) || defined(_Windows) || defined(__CYGWIN__)
       temp = MIN( MAX ( 0, duration ), ULONG_MAX );
-#elif defined(OS2) || defined(__BORLANDC__) || defined(__DJGPP__)
+#elif defined(OS2) || defined(__BORLANDC__) || defined(__DJGPP__) || defined(__MINGW32__)
       temp = MIN( MAX ( 0, duration ), USHRT_MAX );
 #endif
       duration -= temp;
@@ -176,6 +179,8 @@ void hb_tone( double frequency, double duration )
          DosBeep( ( ULONG ) frequency, temp );
 #elif defined(OS2)
          DosBeep( ( USHORT ) frequency, temp );
+#elif defined(__MINGW32__)
+         beep( frequency, temp );
 #elif defined(WINNT)
          Beep( ( ULONG ) frequency, temp );
 #elif defined(_Windows) && ! defined(_Windows)