diff --git a/build/Makefile b/build/Makefile
new file mode 100644
index 00000000..a03b80a6
--- /dev/null
+++ b/build/Makefile
@@ -0,0 +1,34 @@
+#! make -f
+#----------------------------------------------------------------------------
+# Project:  TwlFirm - build
+# File:     Makefile
+#
+# Copyright 2007 Nintendo.  All rights reserved.
+#
+# These coded instructions, statements, and computer programs contain
+# proprietary information of Nintendo of America Inc. and/or Nintendo
+# Company Ltd., and are protected by Federal copyright law.  They may
+# not be disclosed to third parties or copied or duplicated in any form,
+# in whole or in part, without the prior written consent of Nintendo.
+#
+# $Date::            $
+# $Rev:$
+# $Author:$
+#----------------------------------------------------------------------------
+
+include	$(TWLFIRM_ROOT)/build/buildtools/commondefs
+
+
+#----------------------------------------------------------------------------
+
+SUBDIRS =	\
+            tools \
+            libraries \
+            norfirm \
+
+#----------------------------------------------------------------------------
+
+include	$(TWLFIRM_ROOT)/build/buildtools/modulerules
+
+
+#===== End of Makefile =====
diff --git a/build/buildtools/modulerules b/build/buildtools/modulerules
index 01b2f29b..e30e9d8d 100644
--- a/build/buildtools/modulerules
+++ b/build/buildtools/modulerules
@@ -56,15 +56,15 @@ firmlib:
 	@$(MAKE) -C $(TWLFIRM_ROOT)/build/libraries
 
 # .nor
-$(BINDIR)/%.nor: $(SDEPENDS_BIN) $(FIRM_SPEC) $(LDEPENDS_BIN) $(EDEPENDS_BIN) $(MAKEFILE) $(MAKENORFIRM) $(MAKEFIRM_RSA_PRVKEY)
+$(BINDIR)/%.nor: $(SDEPENDS_BIN) $(FIRM_SPEC) $(LDEPENDS_BIN) $(EDEPENDS_BIN) $(MAKEFILE) $(MAKENORFIRM)
 	$(MAKENORFIRM) $(MAKEFIRM_FLAGS) $(MAKEFIRM_DEFS) $(FIRM_SPEC) $@
 
 # .nand
-$(BINDIR)/%.nand: $(SDEPENDS_BIN) $(FIRM_SPEC) $(LDEPENDS_BIN) $(EDEPENDS_BIN) $(MAKEFILE) $(MAKENANDFIRM) $(MAKEFIRM_RSA_PRVKEY)
+$(BINDIR)/%.nand: $(SDEPENDS_BIN) $(FIRM_SPEC) $(LDEPENDS_BIN) $(EDEPENDS_BIN) $(MAKEFILE) $(MAKENANDFIRM)
 	$(MAKENANDFIRM) $(MAKEFIRM_FLAGS) $(MAKEFIRM_DEFS) $(FIRM_SPEC) $@
 
 # .gcd
-$(BINDIR)/%.gcd: $(SDEPENDS_BIN) $(FIRM_SPEC) $(LDEPENDS_BIN) $(EDEPENDS_BIN) $(MAKEFILE) $(MAKEGCDFIRM) $(MAKEFIRM_RSA_PRVKEY)
+$(BINDIR)/%.gcd: $(SDEPENDS_BIN) $(FIRM_SPEC) $(LDEPENDS_BIN) $(EDEPENDS_BIN) $(MAKEFILE) $(MAKEGCDFIRM)
 	$(MAKEGCDFIRM) $(MAKEFIRM_FLAGS) $(MAKEFIRM_DEFS) $(FIRM_SPEC) $@
 
 # .rbin
diff --git a/build/norfirm/Makefile b/build/norfirm/Makefile
new file mode 100644
index 00000000..ba23790e
--- /dev/null
+++ b/build/norfirm/Makefile
@@ -0,0 +1,34 @@
+#! make -f
+#----------------------------------------------------------------------------
+# Project:  TwlFirm - firmware
+# File:     Makefile
+#
+# Copyright 2007 Nintendo.  All rights reserved.
+#
+# These coded instructions, statements, and computer programs contain
+# proprietary information of Nintendo of America Inc. and/or Nintendo
+# Company Ltd., and are protected by Federal copyright law.  They may
+# not be disclosed to third parties or copied or duplicated in any form,
+# in whole or in part, without the prior written consent of Nintendo.
+#
+# $Date::            $
+# $Rev:$
+# $Author:$
+#----------------------------------------------------------------------------
+
+include	$(TWLFIRM_ROOT)/build/buildtools/commondefs
+
+
+#----------------------------------------------------------------------------
+
+SUBDIRS		= \
+			norfirm-print \
+			norfirm-empty \
+
+
+#----------------------------------------------------------------------------
+
+include	$(TWLFIRM_ROOT)/build/buildtools/modulerules
+
+
+#===== End of Makefile =====
diff --git a/build/norfirm/norfirm-empty/Makefile b/build/norfirm/norfirm-empty/Makefile
new file mode 100644
index 00000000..66b5207c
--- /dev/null
+++ b/build/norfirm/norfirm-empty/Makefile
@@ -0,0 +1,50 @@
+#! make -f
+#----------------------------------------------------------------------------
+# Project:  TwlFirm - build
+# File:     Makefile
+#
+# Copyright 2007 Nintendo.  All rights reserved.
+#
+# These coded instructions, statements, and computer programs contain
+# proprietary information of Nintendo of America Inc. and/or Nintendo
+# Company Ltd., and are protected by Federal copyright law.  They may
+# not be disclosed to third parties or copied or duplicated in any form,
+# in whole or in part, without the prior written consent of Nintendo.
+#
+# $Date::            $
+# $Rev:$
+# $Author:$
+#----------------------------------------------------------------------------
+
+
+FIRM_TARGET    = NORFIRM
+
+
+include	$(TWLFIRM_ROOT)/build/buildtools/commondefs
+
+
+#----------------------------------------------------------------------------
+
+SUBDIRS =	\
+
+TARGET_BIN		=	norfirm_empty.nor
+BINDIR			=	.
+MAKEFIRM_RSA_PRVKEY	= $(TWL_KEYSDIR)/rsa/private_nor.der
+
+#※TwlSDKにはまだちゃんとcomponentsがないので、NitroSDKのものを使用。
+MAKEROM_ARM9	 	= $(NITROSDK_ROOT)/components/printserver/ARM9-TS/$(FIRM_BUILD_DIR)/main.nef
+MAKEROM_ARM7	 	= $(NITROSDK_ROOT)/components/mongoose/ARM7-TS/$(FIRM_BUILD_DIR)/mongoose_sub.nef
+
+
+NITRO_MAKEROM	=	TRUE
+MAKEFIRM_FLAGS	+=	-p
+FIRM_SPEC		=	norfirm-BB.norsf
+
+#----------------------------------------------------------------------------
+
+do-build:	$(TARGET_BIN)
+
+include	$(TWLFIRM_ROOT)/build/buildtools/modulerules
+
+
+#===== End of Makefile =====
diff --git a/build/norfirm/norfirm-empty/norfirm-BB.norsf b/build/norfirm/norfirm-empty/norfirm-BB.norsf
new file mode 100644
index 00000000..319e6851
--- /dev/null
+++ b/build/norfirm/norfirm-empty/norfirm-BB.norsf
@@ -0,0 +1,8 @@
+#NORSF ---  Norfirm Spec File
+
+VERSION :		GENERATE
+
+BOOT_NAND :		TRUE  # TRUE or FALSE
+
+NCD_ROMOFS :	0x07fe00
+