diff --git a/stix/Makefile.am b/stix/Makefile.am
index d66adab..741a38f 100644
--- a/stix/Makefile.am
+++ b/stix/Makefile.am
@@ -3,7 +3,7 @@ ACLOCAL_AMFLAGS = -I m4
 
 EXTRA_DIST =
 
-SUBDIRS = libltdl lib
+SUBDIRS = libltdl mod lib
 DIST_SUBDIRS = $(SUBDIRS) 
 
 distclean-local:
diff --git a/stix/Makefile.in b/stix/Makefile.in
index 4ad101f..42bb666 100644
--- a/stix/Makefile.in
+++ b/stix/Makefile.in
@@ -359,7 +359,7 @@ top_srcdir = @top_srcdir@
 AUTOMAKE_OPTION = foreign
 ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = 
-SUBDIRS = libltdl lib
+SUBDIRS = libltdl mod lib
 DIST_SUBDIRS = $(SUBDIRS) 
 all: all-recursive
 
diff --git a/stix/configure b/stix/configure
index 716a70f..b55adef 100755
--- a/stix/configure
+++ b/stix/configure
@@ -19930,7 +19930,7 @@ STIX_PROJECT_AUTHOR="${PACKAGE_BUGREPORT}"
 STIX_PROJECT_URL="${PACKAGE_URL}"
 
 
-ac_config_files="$ac_config_files Makefile lib/Makefile"
+ac_config_files="$ac_config_files Makefile lib/Makefile mod/Makefile"
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
@@ -21084,6 +21084,7 @@ do
     "libtool") CONFIG_COMMANDS="$CONFIG_COMMANDS libtool" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
     "lib/Makefile") CONFIG_FILES="$CONFIG_FILES lib/Makefile" ;;
+    "mod/Makefile") CONFIG_FILES="$CONFIG_FILES mod/Makefile" ;;
 
   *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
   esac
diff --git a/stix/configure.ac b/stix/configure.ac
index e20ca92..4373813 100644
--- a/stix/configure.ac
+++ b/stix/configure.ac
@@ -427,6 +427,7 @@ AC_SUBST(STIX_PROJECT_URL, "${PACKAGE_URL}")
 AC_CONFIG_FILES([
 	Makefile 
 	lib/Makefile 
+	mod/Makefile 
 ])
 AC_OUTPUT
 
diff --git a/stix/kernel/Apex.st b/stix/kernel/Apex.st
index a9babee..2c8f906 100644
--- a/stix/kernel/Apex.st
+++ b/stix/kernel/Apex.st
@@ -66,6 +66,8 @@
 	#method(#class) new: anInteger
 	{
 		| x |
+## TODO: check if the class is a fixed class.
+##       if so, raise an exception.
 		x := self basicNew: anInteger.
 		x initialize. "TODO: assess if it's good to call 'initialize' from new."
 		^x.
@@ -175,6 +177,11 @@
 
 	## TODO: add = and ~= for equality check.
 
+
+	## -------------------------------------------------------
+	## COMMON QUERIES
+	## -------------------------------------------------------
+
 	#method isNil
 	{
 		"^self == nil."
@@ -201,6 +208,16 @@
 		^true.
 	}
 
+	#method isError
+	{
+		^false
+	}
+
+	#method(#class) isError
+	{
+		^false
+	}
+
 	## -------------------------------------------------------
 	## -------------------------------------------------------
 
@@ -287,6 +304,7 @@
 	{
 		self class cannotInstantiate
 	}
+
 }
 
 #class Object(Apex)
diff --git a/stix/kernel/Class.st b/stix/kernel/Class.st
index 4b51a32..a342bef 100644
--- a/stix/kernel/Class.st
+++ b/stix/kernel/Class.st
@@ -1,4 +1,7 @@
-
+##
+## the Class object should be a variable-pointer object because
+## it needs to accomodate class instance variables.
+##
 #class(#pointer) Class(Apex)
 {
 	#dcl spec selfspec superclass subclasses name instvars classvars classinstvars pooldics instmthdic classmthdic.
diff --git a/stix/kernel/Stdio.st b/stix/kernel/Stdio.st
new file mode 100644
index 0000000..2d019b7
--- /dev/null
+++ b/stix/kernel/Stdio.st
@@ -0,0 +1,40 @@
+#class(#word) Stdio(Object)
+{
+	#method(#class) new: size
+	{
+		##self prohibited
+		##raise exception. prohibited...
+		^nil.
+	}
+
+	#method(#class) new
+	{
+		##self prohibited
+		##raise exception. prohibited...
+		^nil.
+	}
+
+	#method(#class) open: name for: mode
+	{
+		^(super new: 1) open: name for: mode
+	}
+
+	#method open: name for: mode
+	{
+		<primitive: #stdio_open>
+	}
+
+	#method close
+	{
+		<primitive: #stdio_close>
+	}
+
+	#method xxx
+	{
+		self basicSize dump.
+	}
+}
+
+#class(#word) Stdio2 (Stdio)
+{
+}
diff --git a/stix/kernel/Stix.st b/stix/kernel/Stix.st
index 3acce5a..247b7c0 100644
--- a/stix/kernel/Stix.st
+++ b/stix/kernel/Stix.st
@@ -11,6 +11,11 @@
 		"accept an arbitary object instead of a string. 
 		 the object can be sent displayString for string conversion"
 	}
+
+	#method isError
+	{
+		^true
+	}
 }
 
 #class Magnitude(Object)
@@ -379,4 +384,5 @@ f isNil ifTrue: [ self error: 'No such function' ].
 
 #########################################################################################
 
+#include 'Stdio.st'.
 #include 'Console.st'.
diff --git a/stix/kernel/test-014.st b/stix/kernel/test-014.st
index 6d0b8bf..21f641c 100644
--- a/stix/kernel/test-014.st
+++ b/stix/kernel/test-014.st
@@ -122,6 +122,11 @@
 		System logNl:(-820186817651640487320479808367534510238779540102526006236474836166734016865205999870833760242352512045225158774173869894826877890589130978987229877889333678492731896878236182891224254464936050871086340438798130266913122427332418216677813151305680453358955006355665628938266331979307689540884269372365762883678113227136498054422414501840232090872158915536978847443767922315217311444711397048331496139248250188991402851129033493732164230227458717486395514436574417275149404197774547389507462779807727615
 		             * 765507696474864454832447821143032209556194237429024272487376513755618415740858933212778176226195677908876814855895611901838419364549855580388081219363378099926549770419687104031809304167273647479680584409544921582452247598843590335565958941218635089801691339265287920342381909847353843571491984747541378691432905678660731517460920201717549951480681654501180257614183394160869490681730637245109396396631700176391975994387097927483353281545628136320635813474136122790139443917922910896873631927820545774) asString.
 		System logNl: S'\0\0\0END OF MAIN\0AB\0\0\0C\0\0\0'.
+
+
+		v1 := Stdio open: '/tmp/1.txt' for: 'w+'.
+		v1 xxx.
+		v1 close.
 	}
 
 }
diff --git a/stix/lib/Makefile.am b/stix/lib/Makefile.am
index b6081d0..9a6489d 100644
--- a/stix/lib/Makefile.am
+++ b/stix/lib/Makefile.am
@@ -74,29 +74,6 @@ if ENABLE_STATIC_MODULE
 #	mod-dir.c mod-dir.h \
 #libstix_la_LIBADD +=
 
-else
-##################################################
-# DYNAMIC MODULES 
-##################################################
-
-CPPFLAGS_MOD_COMMON = $(CPPFLAGS_LIB_COMMON)
-LDFLAGS_MOD_COMMON = $(LDFLAGS_LIB_COMMON)
-LIBADD_MOD_COMMON = -lstix
-
-pkgmodexecdir = $(libdir)
-
-pkgmodexec_LTLIBRARIES = libstix-snd.la libstix-con.la
-
-libstix_snd_la_SOURCES = mod-snd.c mod-snd.h
-libstix_snd_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
-libstix_snd_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
-libstix_snd_la_LIBADD = $(LIBADD_MOD_COMMON)
-
-libstix_con_la_SOURCES = mod-con.c mod-con.h
-libstix_con_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
-libstix_con_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
-libstix_con_la_LIBADD = $(LIBADD_MOD_COMMON) -ltermcap 
-
 endif
 
 
diff --git a/stix/lib/Makefile.in b/stix/lib/Makefile.in
index a6cc669..c92749d 100644
--- a/stix/lib/Makefile.in
+++ b/stix/lib/Makefile.in
@@ -128,39 +128,10 @@ am__uninstall_files_from_dir = { \
     || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
          $(am__cd) "$$dir" && rm -f $$files; }; \
   }
-am__installdirs = "$(DESTDIR)$(pkglibdir)" \
-	"$(DESTDIR)$(pkgmodexecdir)" "$(DESTDIR)$(bindir)" \
+am__installdirs = "$(DESTDIR)$(pkglibdir)" "$(DESTDIR)$(bindir)" \
 	"$(DESTDIR)$(pkgincludedir)"
-LTLIBRARIES = $(pkglib_LTLIBRARIES) $(pkgmodexec_LTLIBRARIES)
+LTLIBRARIES = $(pkglib_LTLIBRARIES)
 am__DEPENDENCIES_1 =
-@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_DEPENDENCIES =  \
-@ENABLE_STATIC_MODULE_FALSE@	$(am__DEPENDENCIES_1)
-am__libstix_con_la_SOURCES_DIST = mod-con.c mod-con.h
-@ENABLE_STATIC_MODULE_FALSE@am_libstix_con_la_OBJECTS =  \
-@ENABLE_STATIC_MODULE_FALSE@	libstix_con_la-mod-con.lo
-libstix_con_la_OBJECTS = $(am_libstix_con_la_OBJECTS)
-AM_V_lt = $(am__v_lt_@AM_V@)
-am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
-am__v_lt_0 = --silent
-am__v_lt_1 = 
-libstix_con_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
-	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
-	$(AM_CFLAGS) $(CFLAGS) $(libstix_con_la_LDFLAGS) $(LDFLAGS) -o \
-	$@
-@ENABLE_STATIC_MODULE_FALSE@am_libstix_con_la_rpath = -rpath \
-@ENABLE_STATIC_MODULE_FALSE@	$(pkgmodexecdir)
-@ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_DEPENDENCIES =  \
-@ENABLE_STATIC_MODULE_FALSE@	$(am__DEPENDENCIES_1)
-am__libstix_snd_la_SOURCES_DIST = mod-snd.c mod-snd.h
-@ENABLE_STATIC_MODULE_FALSE@am_libstix_snd_la_OBJECTS =  \
-@ENABLE_STATIC_MODULE_FALSE@	libstix_snd_la-mod-snd.lo
-libstix_snd_la_OBJECTS = $(am_libstix_snd_la_OBJECTS)
-libstix_snd_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
-	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
-	$(AM_CFLAGS) $(CFLAGS) $(libstix_snd_la_LDFLAGS) $(LDFLAGS) -o \
-	$@
-@ENABLE_STATIC_MODULE_FALSE@am_libstix_snd_la_rpath = -rpath \
-@ENABLE_STATIC_MODULE_FALSE@	$(pkgmodexecdir)
 am__DEPENDENCIES_2 = $(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 libstix_la_DEPENDENCIES = $(am__DEPENDENCIES_2)
 am_libstix_la_OBJECTS = libstix_la-bigint.lo libstix_la-comp.lo \
@@ -170,6 +141,10 @@ am_libstix_la_OBJECTS = libstix_la-bigint.lo libstix_la-comp.lo \
 	libstix_la-proc.lo libstix_la-rbt.lo libstix_la-stix.lo \
 	libstix_la-sym.lo libstix_la-utf8.lo libstix_la-utl.lo
 libstix_la_OBJECTS = $(am_libstix_la_OBJECTS)
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 = 
 libstix_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(libstix_la_LDFLAGS) $(LDFLAGS) -o $@
@@ -214,11 +189,8 @@ AM_V_CCLD = $(am__v_CCLD_@AM_V@)
 am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
-SOURCES = $(libstix_con_la_SOURCES) $(libstix_snd_la_SOURCES) \
-	$(libstix_la_SOURCES) $(stix_SOURCES)
-DIST_SOURCES = $(am__libstix_con_la_SOURCES_DIST) \
-	$(am__libstix_snd_la_SOURCES_DIST) $(libstix_la_SOURCES) \
-	$(stix_SOURCES)
+SOURCES = $(libstix_la_SOURCES) $(stix_SOURCES)
+DIST_SOURCES = $(libstix_la_SOURCES) $(stix_SOURCES)
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -458,30 +430,6 @@ stix_SOURCES = main.c
 stix_CPPFLAGS = $(CPPFLAGS_LIB_COMMON)
 stix_LDFLAGS = $(LDFLAGS_LIB_COMMON)
 stix_LDADD = $(LIBADD_LIB_COMMON) -lstix #-ldyncall_s
-
-##################################################
-# STATIC MODULES BUILT INTO MAIN LIBRARY
-##################################################
-#libstix_la_SOURCES += \
-#	mod-dir.c mod-dir.h \
-#libstix_la_LIBADD +=
-
-##################################################
-# DYNAMIC MODULES 
-##################################################
-@ENABLE_STATIC_MODULE_FALSE@CPPFLAGS_MOD_COMMON = $(CPPFLAGS_LIB_COMMON)
-@ENABLE_STATIC_MODULE_FALSE@LDFLAGS_MOD_COMMON = $(LDFLAGS_LIB_COMMON)
-@ENABLE_STATIC_MODULE_FALSE@LIBADD_MOD_COMMON = -lstix
-@ENABLE_STATIC_MODULE_FALSE@pkgmodexecdir = $(libdir)
-@ENABLE_STATIC_MODULE_FALSE@pkgmodexec_LTLIBRARIES = libstix-snd.la libstix-con.la
-@ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_SOURCES = mod-snd.c mod-snd.h
-@ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
-@ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
-@ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_LIBADD = $(LIBADD_MOD_COMMON)
-@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_SOURCES = mod-con.c mod-con.h
-@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
-@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
-@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_LIBADD = $(LIBADD_MOD_COMMON) -ltermcap 
 all: stix-cfg.h
 	$(MAKE) $(AM_MAKEFLAGS) all-am
 
@@ -568,47 +516,6 @@ clean-pkglibLTLIBRARIES:
 	  rm -f $${locs}; \
 	}
 
-install-pkgmodexecLTLIBRARIES: $(pkgmodexec_LTLIBRARIES)
-	@$(NORMAL_INSTALL)
-	@list='$(pkgmodexec_LTLIBRARIES)'; test -n "$(pkgmodexecdir)" || list=; \
-	list2=; for p in $$list; do \
-	  if test -f $$p; then \
-	    list2="$$list2 $$p"; \
-	  else :; fi; \
-	done; \
-	test -z "$$list2" || { \
-	  echo " $(MKDIR_P) '$(DESTDIR)$(pkgmodexecdir)'"; \
-	  $(MKDIR_P) "$(DESTDIR)$(pkgmodexecdir)" || exit 1; \
-	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(pkgmodexecdir)'"; \
-	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(pkgmodexecdir)"; \
-	}
-
-uninstall-pkgmodexecLTLIBRARIES:
-	@$(NORMAL_UNINSTALL)
-	@list='$(pkgmodexec_LTLIBRARIES)'; test -n "$(pkgmodexecdir)" || list=; \
-	for p in $$list; do \
-	  $(am__strip_dir) \
-	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(pkgmodexecdir)/$$f'"; \
-	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(pkgmodexecdir)/$$f"; \
-	done
-
-clean-pkgmodexecLTLIBRARIES:
-	-test -z "$(pkgmodexec_LTLIBRARIES)" || rm -f $(pkgmodexec_LTLIBRARIES)
-	@list='$(pkgmodexec_LTLIBRARIES)'; \
-	locs=`for p in $$list; do echo $$p; done | \
-	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
-	      sort -u`; \
-	test -z "$$locs" || { \
-	  echo rm -f $${locs}; \
-	  rm -f $${locs}; \
-	}
-
-libstix-con.la: $(libstix_con_la_OBJECTS) $(libstix_con_la_DEPENDENCIES) $(EXTRA_libstix_con_la_DEPENDENCIES) 
-	$(AM_V_CCLD)$(libstix_con_la_LINK) $(am_libstix_con_la_rpath) $(libstix_con_la_OBJECTS) $(libstix_con_la_LIBADD) $(LIBS)
-
-libstix-snd.la: $(libstix_snd_la_OBJECTS) $(libstix_snd_la_DEPENDENCIES) $(EXTRA_libstix_snd_la_DEPENDENCIES) 
-	$(AM_V_CCLD)$(libstix_snd_la_LINK) $(am_libstix_snd_la_rpath) $(libstix_snd_la_OBJECTS) $(libstix_snd_la_LIBADD) $(LIBS)
-
 libstix.la: $(libstix_la_OBJECTS) $(libstix_la_DEPENDENCIES) $(EXTRA_libstix_la_DEPENDENCIES) 
 	$(AM_V_CCLD)$(libstix_la_LINK) -rpath $(pkglibdir) $(libstix_la_OBJECTS) $(libstix_la_LIBADD) $(LIBS)
 install-binPROGRAMS: $(bin_PROGRAMS)
@@ -671,7 +578,6 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c
 
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_con_la-mod-con.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-bigint.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-comp.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-debug.Plo@am__quote@
@@ -689,7 +595,6 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-sym.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-utf8.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-utl.Plo@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_snd_la-mod-snd.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/stix-main.Po@am__quote@
 
 .c.o:
@@ -716,20 +621,6 @@ distclean-compile:
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
 
-libstix_con_la-mod-con.lo: mod-con.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_con_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_con_la-mod-con.lo -MD -MP -MF $(DEPDIR)/libstix_con_la-mod-con.Tpo -c -o libstix_con_la-mod-con.lo `test -f 'mod-con.c' || echo '$(srcdir)/'`mod-con.c
-@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_con_la-mod-con.Tpo $(DEPDIR)/libstix_con_la-mod-con.Plo
-@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='mod-con.c' object='libstix_con_la-mod-con.lo' libtool=yes @AMDEPBACKSLASH@
-@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
-@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_con_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libstix_con_la-mod-con.lo `test -f 'mod-con.c' || echo '$(srcdir)/'`mod-con.c
-
-libstix_snd_la-mod-snd.lo: mod-snd.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_snd_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_snd_la-mod-snd.lo -MD -MP -MF $(DEPDIR)/libstix_snd_la-mod-snd.Tpo -c -o libstix_snd_la-mod-snd.lo `test -f 'mod-snd.c' || echo '$(srcdir)/'`mod-snd.c
-@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_snd_la-mod-snd.Tpo $(DEPDIR)/libstix_snd_la-mod-snd.Plo
-@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='mod-snd.c' object='libstix_snd_la-mod-snd.lo' libtool=yes @AMDEPBACKSLASH@
-@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
-@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_snd_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libstix_snd_la-mod-snd.lo `test -f 'mod-snd.c' || echo '$(srcdir)/'`mod-snd.c
-
 libstix_la-bigint.lo: bigint.c
 @am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_la-bigint.lo -MD -MP -MF $(DEPDIR)/libstix_la-bigint.Tpo -c -o libstix_la-bigint.lo `test -f 'bigint.c' || echo '$(srcdir)/'`bigint.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_la-bigint.Tpo $(DEPDIR)/libstix_la-bigint.Plo
@@ -976,7 +867,7 @@ check-am: all-am
 check: check-am
 all-am: Makefile $(LTLIBRARIES) $(PROGRAMS) $(HEADERS) stix-cfg.h
 installdirs:
-	for dir in "$(DESTDIR)$(pkglibdir)" "$(DESTDIR)$(pkgmodexecdir)" "$(DESTDIR)$(bindir)" "$(DESTDIR)$(pkgincludedir)"; do \
+	for dir in "$(DESTDIR)$(pkglibdir)" "$(DESTDIR)$(bindir)" "$(DESTDIR)$(pkgincludedir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
 	done
 install: install-am
@@ -1012,8 +903,7 @@ maintainer-clean-generic:
 clean: clean-am
 
 clean-am: clean-binPROGRAMS clean-generic clean-libtool \
-	clean-pkglibLTLIBRARIES clean-pkgmodexecLTLIBRARIES \
-	mostlyclean-am
+	clean-pkglibLTLIBRARIES mostlyclean-am
 
 distclean: distclean-am
 	-rm -rf ./$(DEPDIR)
@@ -1040,8 +930,7 @@ install-dvi: install-dvi-am
 
 install-dvi-am:
 
-install-exec-am: install-binPROGRAMS install-pkglibLTLIBRARIES \
-	install-pkgmodexecLTLIBRARIES
+install-exec-am: install-binPROGRAMS install-pkglibLTLIBRARIES
 
 install-html: install-html-am
 
@@ -1082,32 +971,37 @@ ps: ps-am
 ps-am:
 
 uninstall-am: uninstall-binPROGRAMS uninstall-pkgincludeHEADERS \
-	uninstall-pkglibLTLIBRARIES uninstall-pkgmodexecLTLIBRARIES
+	uninstall-pkglibLTLIBRARIES
 	@$(NORMAL_INSTALL)
 	$(MAKE) $(AM_MAKEFLAGS) uninstall-hook
 .MAKE: all install-am install-data-am install-strip uninstall-am
 
 .PHONY: CTAGS GTAGS TAGS all all-am check check-am clean \
 	clean-binPROGRAMS clean-generic clean-libtool \
-	clean-pkglibLTLIBRARIES clean-pkgmodexecLTLIBRARIES \
-	cscopelist-am ctags ctags-am distclean distclean-compile \
-	distclean-generic distclean-hdr distclean-libtool \
-	distclean-tags distdir dvi dvi-am html html-am info info-am \
-	install install-am install-binPROGRAMS install-data \
-	install-data-am install-data-hook install-dvi install-dvi-am \
-	install-exec install-exec-am install-html install-html-am \
-	install-info install-info-am install-man install-pdf \
-	install-pdf-am install-pkgincludeHEADERS \
-	install-pkglibLTLIBRARIES install-pkgmodexecLTLIBRARIES \
-	install-ps install-ps-am install-strip installcheck \
-	installcheck-am installdirs maintainer-clean \
-	maintainer-clean-generic mostlyclean mostlyclean-compile \
-	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
-	tags tags-am uninstall uninstall-am uninstall-binPROGRAMS \
-	uninstall-hook uninstall-pkgincludeHEADERS \
-	uninstall-pkglibLTLIBRARIES uninstall-pkgmodexecLTLIBRARIES
+	clean-pkglibLTLIBRARIES cscopelist-am ctags ctags-am distclean \
+	distclean-compile distclean-generic distclean-hdr \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-binPROGRAMS \
+	install-data install-data-am install-data-hook install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-pkgincludeHEADERS \
+	install-pkglibLTLIBRARIES install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags tags-am uninstall uninstall-am \
+	uninstall-binPROGRAMS uninstall-hook \
+	uninstall-pkgincludeHEADERS uninstall-pkglibLTLIBRARIES
 
 
+##################################################
+# STATIC MODULES BUILT INTO MAIN LIBRARY
+##################################################
+#libstix_la_SOURCES += \
+#	mod-dir.c mod-dir.h \
+#libstix_la_LIBADD +=
+
 install-data-hook:
 	@echo "#ifndef _STIX_CFG_H_" > "$(DESTDIR)$(pkgincludedir)/stix-cfg.h"
 	@echo "#define _STIX_CFG_H_" >> "$(DESTDIR)$(pkgincludedir)/stix-cfg.h"
diff --git a/stix/lib/comp.c b/stix/lib/comp.c
index 0ea9abd..537be60 100644
--- a/stix/lib/comp.c
+++ b/stix/lib/comp.c
@@ -2477,6 +2477,20 @@ static int compile_class_level_variables (stix_t* stix)
 			{
 				var_info_t var;
 
+/*
+TODO: check variability conflict.
+if it's a indexed class, check if the superclass is fixed or index.
+if super is fixed and self is fixed or variable-pointer, no restriction.
+if super is fixed and self is variable-nonpointer, no instance varaible in the super side and in the self side.
+if super is variable-pointer, self must be a variable-pointer. can't be fixed either
+if super is variable-nonpointer, self must be a variable-nonpointer of the same type. can't be fixed either
+if super is variable-nonpointer, no instance variable is allowed.
+				if (stix->c->cls.flags & CLASS_INDEXED)
+				{
+					set_syntax_error (stix, STIX_SYNERR_VARNAMEDUP, TOKEN_LOC(stix), TOKEN_NAME(stix));
+					return -1;
+				}
+*/
 				if (find_class_level_variable(stix, STIX_NULL, TOKEN_NAME(stix), &var) >= 0 ||
 				    stix_lookupdic (stix, stix->sysdic, TOKEN_NAME(stix)) ||  /* conflicts with a top global name */
 				    stix_lookupdic (stix, stix->c->cls.ns_oop, TOKEN_NAME(stix))) /* conflicts with a global name in the class'es name space */
diff --git a/stix/lib/mod-snd.h b/stix/lib/mod-snd.h
deleted file mode 100644
index 6f06e4b..0000000
--- a/stix/lib/mod-snd.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * $Id$
- *
-    Copyright (c) 2006-2016 Chung, Hyung-Hwan. All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in the
-       documentation and/or other materials provided with the distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
-    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _STIX_LIB_MOD_SND_H_
-#define _STIX_LIB_MOD_SND_H_
-
-#include <stix.h>
-
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
-STIX_EXPORT int stix_prim_mod_snd (stix_t* stix, stix_prim_mod_t* mod);
-
-#if defined(__cplusplus)
-}
-#endif
-
-#endif
-
diff --git a/stix/lib/obj.c b/stix/lib/obj.c
index 63f11b4..df12c30 100644
--- a/stix/lib/obj.c
+++ b/stix/lib/obj.c
@@ -189,9 +189,14 @@ static STIX_INLINE int decode_spec (stix_t* stix, stix_oop_t _class, stix_oow_t
 
 		if (indexed_type == STIX_OBJ_TYPE_OOP)
 		{
-			if (named_instvar > STIX_MAX_NAMED_INSTVARS ||
-			    vlen > STIX_MAX_INDEXED_INSTVARS(named_instvar))
+			if (named_instvar > STIX_MAX_NAMED_INSTVARS)
 			{
+				STIX_DEBUG3 (stix, "Too many named instance variables for a variable-pointer class %O - %zu/%zu\n", _class, named_instvar, (stix_oow_t)STIX_MAX_NAMED_INSTVARS); 
+				return -1;
+			}
+			if (vlen > STIX_MAX_INDEXED_INSTVARS(named_instvar))
+			{
+				STIX_DEBUG3 (stix, "Too many unnamed instance variables for a variable-pointer class %O - %zu/%zu\n", _class, vlen, (stix_oow_t)STIX_MAX_INDEXED_INSTVARS(named_instvar)); 
 				return -1;
 			}
 
@@ -200,8 +205,16 @@ static STIX_INLINE int decode_spec (stix_t* stix, stix_oop_t _class, stix_oow_t
 		else
 		{
 			/* a non-pointer indexed class can't have named instance variables */
-			if (named_instvar > 0) return -1;
-			if (vlen > STIX_OBJ_SIZE_MAX) return -1;
+			if (named_instvar > 0) 
+			{
+				STIX_DEBUG1 (stix, "Named instance variables in a variable-nonpointer class %O\n", _class);
+				return -1;
+			}
+			if (vlen > STIX_OBJ_SIZE_MAX) 
+			{
+				STIX_DEBUG3 (stix, "Too many unnamed instance variables for a variable-nonpointer class %O - %zu/%zu\n", _class, vlen, (stix_oow_t)STIX_OBJ_SIZE_MAX); 
+				return -1;
+			}
 		}
 	}
 	else
@@ -209,9 +222,19 @@ static STIX_INLINE int decode_spec (stix_t* stix, stix_oop_t _class, stix_oow_t
 		/* named instance variables only. treat it as if it is an
 		 * indexable class with no variable data */
 		indexed_type = STIX_OBJ_TYPE_OOP;
-		vlen = 0; /* vlen is not used */
 
-		if (named_instvar > STIX_MAX_NAMED_INSTVARS) return -1;
+		if (vlen > 0)
+		{
+			STIX_DEBUG2 (stix, "Unamed instance variables for a fixed class %O - %zu\n", _class, vlen); 
+			return -1;
+		}
+		/*vlen = 0;*/ /* vlen is not used */
+
+		if (named_instvar > STIX_MAX_NAMED_INSTVARS) 
+		{
+			STIX_DEBUG3 (stix, "Too many named instance variables for a fixed class %O - %zu/%zu\n", _class, named_instvar, (stix_oow_t)STIX_MAX_NAMED_INSTVARS); 
+			return -1;
+		}
 		STIX_ASSERT (named_instvar <= STIX_OBJ_SIZE_MAX);
 	}
 
diff --git a/stix/lib/stix-prv.h b/stix/lib/stix-prv.h
index 0f3c321..196a5f6 100644
--- a/stix/lib/stix-prv.h
+++ b/stix/lib/stix-prv.h
@@ -1085,91 +1085,6 @@ stix_oop_process_t stix_makeproc (
 	stix_t* stix
 );
 
-/* ========================================================================= */
-/* utf8.c                                                                    */
-/* ========================================================================= */
-stix_oow_t stix_uctoutf8 (
-	stix_uch_t    uc,
-	stix_bch_t*   utf8,
-	stix_oow_t    size
-);
-
-stix_oow_t stix_utf8touc (
-	const stix_bch_t* utf8,
-	stix_oow_t        size,
-	stix_uch_t*       uc
-);
-
-/**
- * The stix_ucstoutf8() function converts a unicode character string \a ucs 
- * to a UTF8 string and writes it into the buffer pointed to by \a bcs, but
- * not more than \a bcslen bytes including the terminating null.
- *
- * Upon return, \a bcslen is modified to the actual number of bytes written to
- * \a bcs excluding the terminating null; \a ucslen is modified to the number of
- * wide characters converted.
- *
- * You may pass #STIX_NULL for \a bcs to dry-run conversion or to get the
- * required buffer size for conversion. -2 is never returned in this case.
- *
- * \return
- * - 0 on full conversion,
- * - -1 on no or partial conversion for an illegal character encountered,
- * - -2 on no or partial conversion for a small buffer.
- *
- * \code
- *   const stix_uch_t ucs[] = { 'H', 'e', 'l', 'l', 'o' };
- *   stix_bch_t bcs[10];
- *   stix_oow_t ucslen = 5;
- *   stix_oow_t bcslen = STIX_COUNTOF(bcs);
- *   n = stix_ucstoutf8 (ucs, &ucslen, bcs, &bcslen);
- *   if (n <= -1)
- *   {
- *      // conversion error
- *   }
- * \endcode
- */
-int stix_ucstoutf8 (
-	const stix_uch_t*    ucs,
-	stix_oow_t*          ucslen,
-	stix_bch_t*          bcs,
-	stix_oow_t*          bcslen
-);
-
-/**
- * The stix_utf8toucs() function converts a UTF8 string to a uncide string.
- *
- * It never returns -2 if \a ucs is #STIX_NULL.
- *
- * \code
- *  const stix_bch_t* bcs = "test string";
- *  stix_uch_t ucs[100];
- *  stix_oow_t ucslen = STIX_COUNTOF(buf), n;
- *  stix_oow_t bcslen = 11;
- *  int n;
- *  n = stix_utf8toucs (bcs, &bcslen, ucs, &ucslen);
- *  if (n <= -1) { invalid/incomplenete sequence or buffer to small }
- * \endcode
- *
- * For a null-terminated string, you can specify ~(stix_oow_t)0 in
- * \a bcslen. The destination buffer \a ucs also must be large enough to
- * store a terminating null. Otherwise, -2 is returned.
- * 
- * The resulting \a ucslen can still be greater than 0 even if the return
- * value is negative. The value indiates the number of characters converted
- * before the error has occurred.
- *
- * \return 0 on success.
- *         -1 if \a bcs contains an illegal character.
- *         -2 if the wide-character string buffer is too small.
- *         -3 if \a bcs is not a complete sequence.
- */
-int stix_utf8toucs (
-	const stix_bch_t*   bcs,
-	stix_oow_t*         bcslen,
-	stix_uch_t*         ucs,
-	stix_oow_t*         ucslen
-);
 
 /* ========================================================================= */
 /* bigint.c                                                                    */
diff --git a/stix/lib/stix-utl.h b/stix/lib/stix-utl.h
index 625b440..29309d1 100644
--- a/stix/lib/stix-utl.h
+++ b/stix/lib/stix-utl.h
@@ -57,12 +57,12 @@ extern "C" {
 /* ========================================================================= */
 /* utl.c                                                                */
 /* ========================================================================= */
-stix_oow_t stix_hashbytes (
+STIX_EXPORT stix_oow_t stix_hashbytes (
 	const stix_oob_t* ptr,
 	stix_oow_t        len
 );
 
-stix_oow_t stix_hashuchars (
+STIX_EXPORT stix_oow_t stix_hashuchars (
 	const stix_uch_t*  ptr,
 	stix_oow_t        len
 );
@@ -70,84 +70,171 @@ stix_oow_t stix_hashuchars (
 #define stix_hashbchars(ptr,len) stix_hashbytes(ptr,len)
 
 
-int stix_equalchars (
+STIX_EXPORT int stix_equalchars (
 	const stix_uch_t* str1,
 	const stix_uch_t* str2,
 	stix_oow_t        len
 );
 
-int stix_compucstr (
+STIX_EXPORT int stix_compucstr (
 	const stix_uch_t* str1,
 	const stix_uch_t* str2
 );
 
-int stix_compbcstr (
+STIX_EXPORT int stix_compbcstr (
 	const stix_bch_t* str1,
 	const stix_bch_t* str2
 );
 
-int stix_compucbcstr (
+STIX_EXPORT int stix_compucbcstr (
 	const stix_uch_t* str1,
 	const stix_bch_t* str2
 );
 
-int stix_compucxbcstr (
+STIX_EXPORT int stix_compucxbcstr (
 	const stix_uch_t* str1,
 	stix_oow_t        len,
 	const stix_bch_t* str2
 );
 
-void stix_copyuchars (
+STIX_EXPORT void stix_copyuchars (
 	stix_uch_t*       dst,
 	const stix_uch_t* src,
 	stix_oow_t        len
 );
 
-void stix_copybchars (
+STIX_EXPORT void stix_copybchars (
 	stix_bch_t*       dst,
 	const stix_bch_t* src,
 	stix_oow_t        len
 );
 
-void stix_copybchtouchars (
+STIX_EXPORT void stix_copybchtouchars (
 	stix_uch_t*       dst,
 	const stix_bch_t* src,
 	stix_oow_t        len
 );
 
-stix_oow_t stix_copyucstr (
+STIX_EXPORT stix_oow_t stix_copyucstr (
 	stix_uch_t*       dst,
 	stix_oow_t        len,
 	const stix_uch_t* src
 );
 
-stix_oow_t stix_copybcstr (
+STIX_EXPORT stix_oow_t stix_copybcstr (
 	stix_bch_t*       dst,
 	stix_oow_t        len,
 	const stix_bch_t* src
 );
 
-stix_uch_t* stix_finduchar (
+STIX_EXPORT stix_uch_t* stix_finduchar (
 	const stix_uch_t* ptr,
 	stix_oow_t        len,
 	stix_uch_t        c
 );
 
-stix_bch_t* stix_findbchar (
+STIX_EXPORT stix_bch_t* stix_findbchar (
 	const stix_bch_t* ptr,
 	stix_oow_t        len,
 	stix_bch_t        c
 );
 
-stix_oow_t stix_countucstr (
+STIX_EXPORT stix_oow_t stix_countucstr (
 	const stix_uch_t* str
 );
 
-stix_oow_t stix_countbcstr (
+STIX_EXPORT stix_oow_t stix_countbcstr (
 	const stix_bch_t* str
 );
 
 
+
+/* ========================================================================= */
+/* utf8.c                                                                    */
+/* ========================================================================= */
+STIX_EXPORT stix_oow_t stix_uctoutf8 (
+	stix_uch_t    uc,
+	stix_bch_t*   utf8,
+	stix_oow_t    size
+);
+
+STIX_EXPORT stix_oow_t stix_utf8touc (
+	const stix_bch_t* utf8,
+	stix_oow_t        size,
+	stix_uch_t*       uc
+);
+
+/**
+ * The stix_ucstoutf8() function converts a unicode character string \a ucs 
+ * to a UTF8 string and writes it into the buffer pointed to by \a bcs, but
+ * not more than \a bcslen bytes including the terminating null.
+ *
+ * Upon return, \a bcslen is modified to the actual number of bytes written to
+ * \a bcs excluding the terminating null; \a ucslen is modified to the number of
+ * wide characters converted.
+ *
+ * You may pass #STIX_NULL for \a bcs to dry-run conversion or to get the
+ * required buffer size for conversion. -2 is never returned in this case.
+ *
+ * \return
+ * - 0 on full conversion,
+ * - -1 on no or partial conversion for an illegal character encountered,
+ * - -2 on no or partial conversion for a small buffer.
+ *
+ * \code
+ *   const stix_uch_t ucs[] = { 'H', 'e', 'l', 'l', 'o' };
+ *   stix_bch_t bcs[10];
+ *   stix_oow_t ucslen = 5;
+ *   stix_oow_t bcslen = STIX_COUNTOF(bcs);
+ *   n = stix_ucstoutf8 (ucs, &ucslen, bcs, &bcslen);
+ *   if (n <= -1)
+ *   {
+ *      // conversion error
+ *   }
+ * \endcode
+ */
+STIX_EXPORT int stix_ucstoutf8 (
+	const stix_uch_t*    ucs,
+	stix_oow_t*          ucslen,
+	stix_bch_t*          bcs,
+	stix_oow_t*          bcslen
+);
+
+/**
+ * The stix_utf8toucs() function converts a UTF8 string to a uncide string.
+ *
+ * It never returns -2 if \a ucs is #STIX_NULL.
+ *
+ * \code
+ *  const stix_bch_t* bcs = "test string";
+ *  stix_uch_t ucs[100];
+ *  stix_oow_t ucslen = STIX_COUNTOF(buf), n;
+ *  stix_oow_t bcslen = 11;
+ *  int n;
+ *  n = stix_utf8toucs (bcs, &bcslen, ucs, &ucslen);
+ *  if (n <= -1) { invalid/incomplenete sequence or buffer to small }
+ * \endcode
+ *
+ * For a null-terminated string, you can specify ~(stix_oow_t)0 in
+ * \a bcslen. The destination buffer \a ucs also must be large enough to
+ * store a terminating null. Otherwise, -2 is returned.
+ * 
+ * The resulting \a ucslen can still be greater than 0 even if the return
+ * value is negative. The value indiates the number of characters converted
+ * before the error has occurred.
+ *
+ * \return 0 on success.
+ *         -1 if \a bcs contains an illegal character.
+ *         -2 if the wide-character string buffer is too small.
+ *         -3 if \a bcs is not a complete sequence.
+ */
+STIX_EXPORT int stix_utf8toucs (
+	const stix_bch_t*   bcs,
+	stix_oow_t*         bcslen,
+	stix_uch_t*         ucs,
+	stix_oow_t*         ucslen
+);
+
 #if defined(__cplusplus)
 }
 #endif
diff --git a/stix/mod/Makefile.am b/stix/mod/Makefile.am
new file mode 100644
index 0000000..dffc71e
--- /dev/null
+++ b/stix/mod/Makefile.am
@@ -0,0 +1,66 @@
+AUTOMAKE_OPTIONS = nostdinc
+
+CPPFLAGS_ALL_COMMON = \
+	-I$(abs_builddir) \
+	-I$(abs_srcdir) \
+	-I$(abs_srcdir)/../lib \
+	-I$(includedir)	
+
+LDFLAGS_ALL_COMMON = -L$(abs_builddir) -L$(libdir)
+
+##################################################
+# MAIN LIBRARY 
+##################################################
+
+CPPFLAGS_LIB_COMMON = $(CPPFLAGS_ALL_COMMON) $(LTDLINCL)
+LDFLAGS_LIB_COMMON = $(LDFLAGS_ALL_COMMON) -version-info 1:0:0 -no-undefined
+LIBADD_LIB_COMMON = $(LIBM) $(LIBLTDL) 
+
+if WIN32
+# you must adjust the value of DEFAULT_MODPOSTFIX according 
+# to the first number in -version-info above
+CPPFLAGS_LIB_COMMON += -DSTIX_DEFAULT_MODPREFIX=\"libstix-\" -DSTIX_DEFAULT_MODPOSTFIX=\"-1\"
+else
+CPPFLAGS_LIB_COMMON += -DSTIX_DEFAULT_MODPREFIX=\"$(libdir)/libstix-\" -DSTIX_DEFAULT_MODPOSTFIX=\"\"
+endif
+
+if ENABLE_STATIC_MODULE
+
+##################################################
+# STATIC MODULES BUILT INTO MAIN LIBRARY
+##################################################
+#libstix_la_SOURCES += mod-dir.c mod-dir.h \
+#libstix_la_LIBADD +=
+
+else
+
+##################################################
+# DYNAMIC MODULES 
+##################################################
+
+CPPFLAGS_MOD_COMMON = $(CPPFLAGS_LIB_COMMON)
+LDFLAGS_MOD_COMMON = $(LDFLAGS_LIB_COMMON)
+LIBADD_MOD_COMMON = -lstix
+
+pkgmodexecdir = $(libdir)
+
+pkgmodexec_LTLIBRARIES = libstix-stdio.la libstix-sound.la libstix-console.la
+
+libstix_stdio_la_SOURCES = stdio.c 
+libstix_stdio_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
+libstix_stdio_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
+libstix_stdio_la_LIBADD = $(LIBADD_MOD_COMMON)
+
+libstix_sound_la_SOURCES = sound.c sound.h
+libstix_sound_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
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+libstix_console_la_LIBADD = $(LIBADD_MOD_COMMON) -ltermcap 
+
+endif
+
+
diff --git a/stix/mod/Makefile.in b/stix/mod/Makefile.in
new file mode 100644
index 0000000..d059134
--- /dev/null
+++ b/stix/mod/Makefile.in
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+top_srcdir = @top_srcdir@
+AUTOMAKE_OPTIONS = nostdinc
+CPPFLAGS_ALL_COMMON = \
+	-I$(abs_builddir) \
+	-I$(abs_srcdir) \
+	-I$(abs_srcdir)/../lib \
+	-I$(includedir)	
+
+LDFLAGS_ALL_COMMON = -L$(abs_builddir) -L$(libdir)
+
+##################################################
+# MAIN LIBRARY 
+##################################################
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+LDFLAGS_LIB_COMMON = $(LDFLAGS_ALL_COMMON) -version-info 1:0:0 -no-undefined
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+
+##################################################
+# STATIC MODULES BUILT INTO MAIN LIBRARY
+##################################################
+#libstix_la_SOURCES += mod-dir.c mod-dir.h \
+#libstix_la_LIBADD +=
+
+##################################################
+# DYNAMIC MODULES 
+##################################################
+@ENABLE_STATIC_MODULE_FALSE@CPPFLAGS_MOD_COMMON = $(CPPFLAGS_LIB_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@LDFLAGS_MOD_COMMON = $(LDFLAGS_LIB_COMMON)
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+@ENABLE_STATIC_MODULE_FALSE@libstix_sound_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@libstix_sound_la_LIBADD = $(LIBADD_MOD_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@libstix_console_la_SOURCES = console.c console.h
+@ENABLE_STATIC_MODULE_FALSE@libstix_console_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@libstix_console_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@libstix_console_la_LIBADD = $(LIBADD_MOD_COMMON) -ltermcap 
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
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+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign mod/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign mod/Makefile
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+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
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+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+install-pkgmodexecLTLIBRARIES: $(pkgmodexec_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(pkgmodexec_LTLIBRARIES)'; test -n "$(pkgmodexecdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(pkgmodexecdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(pkgmodexecdir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(pkgmodexecdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(pkgmodexecdir)"; \
+	}
+
+uninstall-pkgmodexecLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(pkgmodexec_LTLIBRARIES)'; test -n "$(pkgmodexecdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(pkgmodexecdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(pkgmodexecdir)/$$f"; \
+	done
+
+clean-pkgmodexecLTLIBRARIES:
+	-test -z "$(pkgmodexec_LTLIBRARIES)" || rm -f $(pkgmodexec_LTLIBRARIES)
+	@list='$(pkgmodexec_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+libstix-console.la: $(libstix_console_la_OBJECTS) $(libstix_console_la_DEPENDENCIES) $(EXTRA_libstix_console_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libstix_console_la_LINK) $(am_libstix_console_la_rpath) $(libstix_console_la_OBJECTS) $(libstix_console_la_LIBADD) $(LIBS)
+
+libstix-sound.la: $(libstix_sound_la_OBJECTS) $(libstix_sound_la_DEPENDENCIES) $(EXTRA_libstix_sound_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libstix_sound_la_LINK) $(am_libstix_sound_la_rpath) $(libstix_sound_la_OBJECTS) $(libstix_sound_la_LIBADD) $(LIBS)
+
+libstix-stdio.la: $(libstix_stdio_la_OBJECTS) $(libstix_stdio_la_DEPENDENCIES) $(EXTRA_libstix_stdio_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libstix_stdio_la_LINK) $(am_libstix_stdio_la_rpath) $(libstix_stdio_la_OBJECTS) $(libstix_stdio_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_console_la-console.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_sound_la-sound.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_stdio_la-stdio.Plo@am__quote@
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.o$$||'`;\
+@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $$depbase.Tpo -c -o $@ $< &&\
+@am__fastdepCC_TRUE@	$(am__mv) $$depbase.Tpo $$depbase.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
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+
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+@am__fastdepCC_TRUE@	$(am__mv) $$depbase.Tpo $$depbase.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+
+.c.lo:
+@am__fastdepCC_TRUE@	$(AM_V_CC)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.lo$$||'`;\
+@am__fastdepCC_TRUE@	$(LTCOMPILE) -MT $@ -MD -MP -MF $$depbase.Tpo -c -o $@ $< &&\
+@am__fastdepCC_TRUE@	$(am__mv) $$depbase.Tpo $$depbase.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
+
+libstix_console_la-console.lo: console.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_console_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_console_la-console.lo -MD -MP -MF $(DEPDIR)/libstix_console_la-console.Tpo -c -o libstix_console_la-console.lo `test -f 'console.c' || echo '$(srcdir)/'`console.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_console_la-console.Tpo $(DEPDIR)/libstix_console_la-console.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='console.c' object='libstix_console_la-console.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_console_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libstix_console_la-console.lo `test -f 'console.c' || echo '$(srcdir)/'`console.c
+
+libstix_sound_la-sound.lo: sound.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_sound_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_sound_la-sound.lo -MD -MP -MF $(DEPDIR)/libstix_sound_la-sound.Tpo -c -o libstix_sound_la-sound.lo `test -f 'sound.c' || echo '$(srcdir)/'`sound.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_sound_la-sound.Tpo $(DEPDIR)/libstix_sound_la-sound.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='sound.c' object='libstix_sound_la-sound.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
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+
+libstix_stdio_la-stdio.lo: stdio.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_stdio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_stdio_la-stdio.lo -MD -MP -MF $(DEPDIR)/libstix_stdio_la-stdio.Tpo -c -o libstix_stdio_la-stdio.lo `test -f 'stdio.c' || echo '$(srcdir)/'`stdio.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_stdio_la-stdio.Tpo $(DEPDIR)/libstix_stdio_la-stdio.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='stdio.c' object='libstix_stdio_la-stdio.lo' libtool=yes @AMDEPBACKSLASH@
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+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
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+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+
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+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+	for dir in "$(DESTDIR)$(pkgmodexecdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-pkgmodexecLTLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
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+install-dvi-am:
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+install-exec-am: install-pkgmodexecLTLIBRARIES
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+install-ps-am:
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+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-am
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+pdf-am:
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+ps: ps-am
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+ps-am:
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+uninstall-am: uninstall-pkgmodexecLTLIBRARIES
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+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am check check-am clean clean-generic \
+	clean-libtool clean-pkgmodexecLTLIBRARIES cscopelist-am ctags \
+	ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-pkgmodexecLTLIBRARIES install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags tags-am uninstall uninstall-am \
+	uninstall-pkgmodexecLTLIBRARIES
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/stix/lib/mod-con.c b/stix/mod/console.c
similarity index 97%
rename from stix/lib/mod-con.c
rename to stix/mod/console.c
index 3dbd6f0..6b0c8da 100644
--- a/stix/lib/mod-con.c
+++ b/stix/mod/console.c
@@ -25,11 +25,9 @@
  */
 
 
-#include "mod-con.h"
+#include "console.h"
 #include <stix-utl.h>
 
-#include "stix-prv.h"  /* TODO: remove this header after refactoring it */
-
 #include <unistd.h>
 #include <fcntl.h> 
 
@@ -299,7 +297,7 @@ static void unload (stix_t* stix, stix_prim_mod_t* mod)
 }
 
 
-int stix_prim_mod_con (stix_t* stix, stix_prim_mod_t* mod)
+int stix_prim_mod_console (stix_t* stix, stix_prim_mod_t* mod)
 {
 	mod->query = query;
 	mod->unload = unload; 
diff --git a/stix/lib/mod-snd.c b/stix/mod/sound.c
similarity index 97%
rename from stix/lib/mod-snd.c
rename to stix/mod/sound.c
index 4e53a8d..62ff0ea 100644
--- a/stix/lib/mod-snd.c
+++ b/stix/mod/sound.c
@@ -25,7 +25,7 @@
  */
 
 
-#include "mod-snd.h"
+#include "sound.h"
 #include <stix-utl.h>
 
 /* ------------------------------------------------------------------------ */
@@ -93,7 +93,7 @@ static void unload (stix_t* stix, stix_prim_mod_t* mod)
 }
 
 
-int stix_prim_mod_snd (stix_t* stix, stix_prim_mod_t* mod)
+int stix_prim_mod_sound (stix_t* stix, stix_prim_mod_t* mod)
 {
 	mod->query = query;
 	mod->unload = unload;
diff --git a/stix/mod/stdio.c b/stix/mod/stdio.c
new file mode 100644
index 0000000..ac2ba34
--- /dev/null
+++ b/stix/mod/stdio.c
@@ -0,0 +1,198 @@
+/*
+ * $Id$
+ *
+    Copyright (c) 2014-2016 Chung, Hyung-Hwan. All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <stix.h>
+#include <stix-utl.h>
+
+#include <stdio.h>
+#include <limits.h>
+
+static int prim_open (stix_t* stix, stix_ooi_t nargs)
+{
+	stix_oop_word_t rcv;
+	stix_oop_char_t name;
+	stix_oop_char_t mode;
+	FILE* fp;
+
+#if defined(STIX_OOCH_IS_UCH)
+	stix_oow_t ucslen, bcslen;
+	stix_bch_t namebuf[PATH_MAX];
+	stix_bch_t modebuf[32]; /* TODO: dynamic-sized conversion?? */
+#endif
+
+	rcv = (stix_oop_word_t)STIX_STACK_GETRCV(stix, nargs);
+	name = (stix_oop_char_t)STIX_STACK_GETARG(stix, nargs, 0);
+	mode = (stix_oop_char_t)STIX_STACK_GETARG(stix, nargs, 1);
+
+#if defined(STIX_OOCH_IS_UCH)
+/* TODO: error check on string conversion */
+	ucslen = STIX_OBJ_GET_SIZE(name);
+	bcslen = STIX_COUNTOF(namebuf) - 1;
+	stix_ucstoutf8 (name->slot, &ucslen, namebuf, &bcslen);
+	namebuf[bcslen] = '\0';
+
+	ucslen = STIX_OBJ_GET_SIZE(mode);
+	bcslen = STIX_COUNTOF(modebuf) - 1;
+	stix_ucstoutf8 (mode->slot, &ucslen, modebuf, &bcslen);
+	modebuf[bcslen] = '\0';
+
+STIX_DEBUG2 (stix, "opening %s for %s\n", namebuf, modebuf);
+	fp = fopen (namebuf, modebuf);
+#else
+	fp = fopen (name->slot, mode->slot);
+#endif
+	if (!fp) 
+	{
+		return -1;  /* TODO: return success with an object instead... */
+	}
+
+	rcv->slot[0] = (stix_oow_t)fp;
+	STIX_STACK_SETRETTORCV (stix, nargs);
+	return 1;
+}
+
+static int prim_close (stix_t* stix, stix_ooi_t nargs)
+{
+	stix_oop_word_t rcv;
+
+	rcv = (stix_oop_word_t)STIX_STACK_GETRCV(stix, nargs);
+	if (rcv->slot[0])
+	{
+		fclose ((FILE*)rcv->slot[0]);
+		rcv->slot[0] = 0;
+	}
+
+	STIX_STACK_SETRETTORCV (stix, nargs);
+	return 1;
+}
+
+static int prim_write (stix_t* stix, stix_ooi_t nargs)
+{
+	/* return how many bytes have been written.. */
+
+	STIX_STACK_SETRETTORCV (stix, nargs);
+	return 1;
+}
+
+/* ------------------------------------------------------------------------ */
+
+typedef struct fnctab_t fnctab_t;
+struct fnctab_t
+{
+	const stix_bch_t* name;
+	stix_prim_impl_t handler;
+};
+
+static fnctab_t fnctab[] =
+{
+	{ "close",      prim_close     },
+	{ "open",       prim_open      },
+	{ "write",      prim_write     }
+};
+
+/* ------------------------------------------------------------------------ */
+
+static stix_prim_impl_t query (stix_t* stix, stix_prim_mod_t* mod, const stix_ooch_t* name)
+{
+	int left, right, mid, n;
+
+	left = 0; right = STIX_COUNTOF(fnctab) - 1;
+
+	while (left <= right)
+	{
+		mid = (left + right) / 2;
+
+		n = stix_compoocbcstr (name, fnctab[mid].name);
+		if (n < 0) right = mid - 1; 
+		else if (n > 0) left = mid + 1;
+		else
+		{
+			return fnctab[mid].handler;
+		}
+	}
+
+	stix->errnum = STIX_ENOENT;
+	return STIX_NULL;
+}
+
+#if 0
+/* TOOD: concept of a argument_check fucntion?
+ * check if receiver is a certain object?
+ * check if receiver is at a certain size?
+ * etc...
+ */
+static int sanity_check (stix_t* stix)
+{
+}
+#endif
+
+static void unload (stix_t* stix, stix_prim_mod_t* mod)
+{
+	/* TODO: close all open handle?? */
+}
+
+
+int stix_prim_mod_stdio (stix_t* stix, stix_prim_mod_t* mod)
+{
+	mod->query = query;
+	mod->unload = unload; 
+	mod->ctx = STIX_NULL;
+
+#if 0
+
+#include 'Stix.st'.
+#import 'Console'.
+
+	c = stix_findclass (stix, "Console");
+	if (!c) c = stix_makeclass (stix, "Console", "x y"); <- provides an API to create a simple class
+
+	stix_addmethod (stix, c, "open",         prim_open);
+	stix_addmethod (stix, c, "close:",       prim_close);
+	stix_addmethod (stix, c, "setCursorTo:", prim_setcursor);
+	stix_addmethod (stix, c, "clear", prim_clear );
+	stix_addmethod (stix, c, "write", prim_write );
+
+
+
+
+/* GRAMMER ENHANCEMENT */
+fun abc (a, b, c) <----- this style, register C style method
+{
+}
+
+fun abc: a with: b c: c <----- smalltalk style 
+{
+}
+
+abc->def (a, b, c)   <-------    use ->  as an c style method indicator
+abc abc: a with: b c: c
+
+#endif
+
+	return 0;
+}
+