diff --git a/Makefile b/Makefile
index 4e42b06..a192a89 100644
--- a/Makefile
+++ b/Makefile
@@ -50,6 +50,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/src/token.h \
 		$(PACKAGE)-$(VERSION)/src/project.conf \
 		$(PACKAGE)-$(VERSION)/src/arch/i386.c \
+		$(PACKAGE)-$(VERSION)/src/arch/i386_real.c \
 		$(PACKAGE)-$(VERSION)/src/arch/i486.c \
 		$(PACKAGE)-$(VERSION)/src/arch/sparc.c \
 		$(PACKAGE)-$(VERSION)/src/arch/Makefile \
@@ -70,6 +71,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/src/format/Makefile \
 		$(PACKAGE)-$(VERSION)/src/format/project.conf \
 		$(PACKAGE)-$(VERSION)/test/i386.S \
+		$(PACKAGE)-$(VERSION)/test/i386_real.S \
 		$(PACKAGE)-$(VERSION)/test/i486.S \
 		$(PACKAGE)-$(VERSION)/test/sparc.S \
 		$(PACKAGE)-$(VERSION)/test/Makefile \
diff --git a/src/arch/Makefile b/src/arch/Makefile
index 407ec5f..ca56d9b 100644
--- a/src/arch/Makefile
+++ b/src/arch/Makefile
@@ -1,4 +1,4 @@
-TARGETS	= i386.so i486.so sparc.so
+TARGETS	= i386.so i386_real.so i486.so sparc.so
 PREFIX	= /usr/local
 DESTDIR	= 
 LIBDIR	= $(PREFIX)/lib
@@ -25,6 +25,13 @@ i386_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
 i386.so: $(i386_OBJS)
 	$(LD) -o i386.so $(i386_OBJS) $(i386_LDFLAGS)
 
+i386_real_OBJS = i386_real.o
+i386_real_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
+i386_real_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
+
+i386_real.so: $(i386_real_OBJS)
+	$(LD) -o i386_real.so $(i386_real_OBJS) $(i386_real_LDFLAGS)
+
 i486_OBJS = i486.o
 i486_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
 i486_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
@@ -42,6 +49,9 @@ sparc.so: $(sparc_OBJS)
 i386.o: i386.c common.ins null.ins i386.h i386.ins i386.reg
 	$(CC) $(i386_CFLAGS) -c i386.c
 
+i386_real.o: i386_real.c common.ins null.ins i386.h i386.ins i386.reg
+	$(CC) $(i386_real_CFLAGS) -c i386_real.c
+
 i486.o: i486.c common.ins null.ins i386.h i386.ins i386.reg i486.ins
 	$(CC) $(i486_CFLAGS) -c i486.c
 
@@ -49,7 +59,7 @@ sparc.o: sparc.c common.ins null.ins sparc.ins sparc.reg
 	$(CC) $(sparc_CFLAGS) -c sparc.c
 
 clean:
-	$(RM) -- $(i386_OBJS) $(i486_OBJS) $(sparc_OBJS)
+	$(RM) -- $(i386_OBJS) $(i386_real_OBJS) $(i486_OBJS) $(sparc_OBJS)
 
 distclean: clean
 	$(RM) -- $(TARGETS)
@@ -58,12 +68,15 @@ install: $(TARGETS)
 	$(MKDIR) $(DESTDIR)$(LIBDIR)/asm/arch
 	$(INSTALL) -m 0644 -- i386.so $(DESTDIR)$(LIBDIR)/asm/arch/i386.so
 	$(MKDIR) $(DESTDIR)$(LIBDIR)/asm/arch
+	$(INSTALL) -m 0644 -- i386_real.so $(DESTDIR)$(LIBDIR)/asm/arch/i386_real.so
+	$(MKDIR) $(DESTDIR)$(LIBDIR)/asm/arch
 	$(INSTALL) -m 0644 -- i486.so $(DESTDIR)$(LIBDIR)/asm/arch/i486.so
 	$(MKDIR) $(DESTDIR)$(LIBDIR)/asm/arch
 	$(INSTALL) -m 0644 -- sparc.so $(DESTDIR)$(LIBDIR)/asm/arch/sparc.so
 
 uninstall:
 	$(RM) -- $(DESTDIR)$(LIBDIR)/asm/arch/i386.so
+	$(RM) -- $(DESTDIR)$(LIBDIR)/asm/arch/i386_real.so
 	$(RM) -- $(DESTDIR)$(LIBDIR)/asm/arch/i486.so
 	$(RM) -- $(DESTDIR)$(LIBDIR)/asm/arch/sparc.so
 
diff --git a/src/arch/i386.ins b/src/arch/i386.ins
index 37ad5d2..0ad6fe5 100644
--- a/src/arch/i386.ins
+++ b/src/arch/i386.ins
@@ -248,5 +248,14 @@
 { "bts",	0x0fba,		OP2F, OP_RMW_D8+5,OP_S8,     AOT_NONE	},
 { "bts",	0x0fba,		OP2F, OP_RMW_DW+5,OP_S8,     AOT_NONE	},
 { "bts",	0x0fba,		OP2F, OP_RMW_RW+5,OP_S8,     AOT_NONE	},
+/* CALL */
+/* FIXME implement */
+#if defined(ARCH_i386_real) /* i386 in real mode */
+/* CBW */
+{ "cbw",	0x98,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
+#else
+/* CWDE */
+{ "cwde",	0x98,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
+#endif
 /* NOP									*/
 { "nop",	0x90,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
diff --git a/src/arch/i386_real.c b/src/arch/i386_real.c
new file mode 100644
index 0000000..5c8088e
--- /dev/null
+++ b/src/arch/i386_real.c
@@ -0,0 +1,79 @@
+/* $Id$ */
+/* Copyright (c) 2011 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS Devel asm */
+/* This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+
+
+#include <stddef.h>
+#include <string.h>
+#include "Asm.h"
+#define ARCH_i386_real
+
+
+/* i386_real */
+/* private */
+/* types */
+/* register sizes */
+#define REG(name, size, id) REG_ ## name ## _size = size,
+enum
+{
+#include "i386.reg"
+	REG_size_count
+};
+#undef REG
+
+/* register ids */
+#define REG(name, size, id) REG_ ## name ## _id = id,
+enum
+{
+#include "i386.reg"
+	REG_id_count
+};
+#undef REG
+
+
+/* variables */
+#define REG(name, size, id) { "" # name, size, id },
+static ArchRegister _i386_real_registers[] =
+{
+#include "i386.reg"
+	{ NULL,		0, 0 }
+};
+#undef REG
+
+static ArchInstruction _i386_real_instructions[] =
+{
+#include "i386.ins"
+#include "common.ins"
+#include "null.ins"
+};
+
+
+/* functions */
+#include "i386.h"
+
+
+/* public */
+/* variables */
+/* plug-in */
+ArchPlugin arch_plugin =
+{
+	NULL,
+	"i386_real",
+	NULL,
+	_i386_real_registers,
+	_i386_real_instructions,
+	_i386_write,
+	NULL
+};
diff --git a/src/arch/project.conf b/src/arch/project.conf
index 067c56a..be7b54f 100644
--- a/src/arch/project.conf
+++ b/src/arch/project.conf
@@ -1,4 +1,4 @@
-targets=i386,i486,sparc
+targets=i386,i386_real,i486,sparc
 cppflags_force=-I ../../include
 cflags_force=-W
 cflags=-Wall -fPIC -pedantic
@@ -12,6 +12,14 @@ install=$(LIBDIR)/asm/arch
 [i386.c]
 depends=common.ins,null.ins,i386.h,i386.ins,i386.reg
 
+[i386_real]
+type=plugin
+sources=i386_real.c
+install=$(LIBDIR)/asm/arch
+
+[i386_real.c]
+depends=common.ins,null.ins,i386.h,i386.ins,i386.reg
+
 [i486]
 type=plugin
 sources=i486.c
diff --git a/test/Makefile b/test/Makefile
index 7b71445..cbd4937 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -1,4 +1,4 @@
-TARGETS	= i386.o i486.o sparc.o
+TARGETS	= i386.o i386_real.o i486.o sparc.o
 PREFIX	= /usr/local
 DESTDIR	= 
 BINDIR	= $(PREFIX)/bin
@@ -15,6 +15,9 @@ all: $(TARGETS)
 i386.o_OBJS = i386.o
 i386.o_ASFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(ASFLAGS) -a i386 -f flat
 
+i386_real.o_OBJS = i386_real.o
+i386_real.o_ASFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(ASFLAGS) -a i386_real -f flat
+
 i486.o_OBJS = i486.o
 i486.o_ASFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(ASFLAGS) -a i486 -f flat
 
@@ -24,6 +27,9 @@ sparc.o_ASFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(ASFLAGS) -a sparc -f flat
 i386.o: i386.S ../src/asm
 	$(AS) $(i386.o_ASFLAGS) -o i386.o i386.S
 
+i386_real.o: i386_real.S ../src/asm
+	$(AS) $(i386_real.o_ASFLAGS) -o i386_real.o i386_real.S
+
 i486.o: i486.S ../src/asm
 	$(AS) $(i486.o_ASFLAGS) -o i486.o i486.S
 
@@ -31,7 +37,7 @@ sparc.o: sparc.S ../src/asm
 	$(AS) $(sparc.o_ASFLAGS) -o sparc.o sparc.S
 
 clean:
-	$(RM) -- $(i386.o_OBJS) $(i486.o_OBJS) $(sparc.o_OBJS)
+	$(RM) -- $(i386.o_OBJS) $(i386_real.o_OBJS) $(i486.o_OBJS) $(sparc.o_OBJS)
 
 distclean: clean
 	$(RM) -- $(TARGETS)
diff --git a/test/i386.S b/test/i386.S
index 0bf5f5f..a357c0f 100644
--- a/test/i386.S
+++ b/test/i386.S
@@ -74,5 +74,7 @@
 	bts	[%eax], %ecx			/* 0f ab 08		*/
 	bts	%eax, $0x42			/* 0f ba e8 42		*/
 	bts	[%eax], $0x42			/* 0f ba 28 42		*/
+	/* CWDE */
+	cwde
 	/* NOP */
 	nop
diff --git a/test/i386_real.S b/test/i386_real.S
new file mode 100644
index 0000000..dda4406
--- /dev/null
+++ b/test/i386_real.S
@@ -0,0 +1,4 @@
+/* $Id$ */
+.text
+	/* CBW */
+	cbw
diff --git a/test/project.conf b/test/project.conf
index 3c57589..6897c1b 100644
--- a/test/project.conf
+++ b/test/project.conf
@@ -1,4 +1,4 @@
-targets=i386.o,i486.o,sparc.o
+targets=i386.o,i386_real.o,i486.o,sparc.o
 as=../src/asm
 dist=Makefile
 
@@ -10,6 +10,14 @@ sources=i386.S
 asflags=-a i386 -f flat
 depends=../src/asm
 
+[i386_real.o]
+type=object
+sources=i386_real.S
+
+[i386_real.S]
+asflags=-a i386_real -f flat
+depends=../src/asm
+
 [i486.o]
 type=object
 sources=i486.S