diff --git a/ChangeLog b/ChangeLog
index ae4e90a827..5c840fbe56 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -336,3 +336,6 @@
 
 0.3.9 2008-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
 
+	* Began adding support for the ZiLOG Z8Encore! microcontroller for the Z8Encore000ZCO
+	  development board and the Z8F642 part.
+
diff --git a/Documentation/NuttX.html b/Documentation/NuttX.html
index fc1ad062c5..c7a455600d 100644
--- a/Documentation/NuttX.html
+++ b/Documentation/NuttX.html
@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
-      <p>Last Updated: February 10, 2008</p>
+      <p>Last Updated: February 11, 2008</p>
     </td>
   </tr>
 </table>
@@ -600,7 +600,28 @@
     </p>
     <p>
       <b>STATUS:</b>
-      The preliminary release of support for the z16f was made available in NuttX version 0.3.7.
+      The initial release of support for the z16f was made available in NuttX version 0.3.7.
+    </p>
+   </td>
+</tr>
+<tr>
+  <td valign="top"><img src="favicon.ico"></td>
+  <td bgcolor="#5eaee1">
+    <b>Zilog Z8Encore!</b>
+  </td>
+</tr>
+<tr>
+  <td><br></td>
+  <td>
+    <p>
+      <b>Zilog Z8Encore! Microncontroller</b>.
+      This port use the Zilog z8encore000zco development kit, Z8F642 part, and the Zilog
+      ZDS-II Windows command line tools.
+      The development environment is Cygwin under WinXP.
+    </p>
+    <p>
+      <b>STATUS:</b>
+      The Z8Encore! port is a work in progress and will be released in a future NuttX version.
     </p>
    </td>
 </tr>
@@ -969,6 +990,9 @@ buildroot-0.1.0 2007-03-09 &lt;spudmonkey@racsa.co.cr&gt
 <pre><ul>
 nuttx-0.3.9 2008-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
+	* Began adding support for the ZiLOG Z8Encore! microcontroller for the Z8Encore000ZCO
+	  development board and the Z8F642 part.
+
 pascal-0.1.3 2008-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
 buildroot-0.1.1 2007-xx-xx &lt;spudmonkey@racsa.co.cr&gt
diff --git a/Documentation/NuttxPortingGuide.html b/Documentation/NuttxPortingGuide.html
index 0e5963b2a1..9a668d86c5 100644
--- a/Documentation/NuttxPortingGuide.html
+++ b/Documentation/NuttxPortingGuide.html
@@ -16,7 +16,7 @@
   </b></big></h1>
   <p><small>by</small></p>
   <p>Gregory Nutt</p>
-  <p><small>Last Update: February 7, 2008</small></p>
+  <p><small>Last Update: February 11, 2008</small></p>
 </center>
 
 <center><h1>Table of Contents</h1></center>
@@ -384,7 +384,7 @@
     This directory holds common ARM architectures.  At present, this includes
     the following subdirectories:
     <ul>
-      <li><code>arch/arm/include</code> and <code>arch/arm/common</code>:
+      <li><code>arch/arm/include</code> and <code>arch/arm/src/common</code>:
           Common ARM logic.
       </li>
 
@@ -426,13 +426,34 @@
   <li><code>arch/z16f</code>:
     Zilog z16f Microcontroller.
     This port uses the Zilog z16f2800100zcog Development Kit.
-    This is a work in progress.
+    This port was released with nuttx-0.3.7.
   </li>
 
     <li><code>arch/z80</code>:
-    Zilog z80 Microcontroller.
-    This port has been verified using only a z80 instruction simulator.
-  </li>
+    This directory holds 8-bit ZiLOG architectures.  At present, this includes the
+    Zilog z80 and z8Encore! Microcontrollers.
+    <ul>
+      <li><code>arch/z80/include</code> and <code>arch/z80/src/common</code>:
+          Common logic.
+      </li>
+
+      <li><code>arch/z80/include/z80</code> and <code>arch/z80/src/z80</code>:
+        The Z80 port was released in nuttx-0.3.6 has been verified using only a
+        z80 instruction simulator.
+        The set simulator  can be found in the NuttX CVS at
+        http://nuttx.cvs.sourceforge.net/nuttx/misc/sims/z80sim.
+        This port also the SDCC toolchain (http://sdcc.sourceforge.net/")
+        (verified with version 2.6.0 and 2.7.0).
+      </li>
+
+      <li><code>arch/z80/include/z8</code> and <code>arch/z80/src/z8</code>:
+        The Z8Encore! port use the Zilog z8encore000zco
+        development kit, Z8F642 part, and the Zilog ZDS-II Windows command line
+        tools.  The development environment is Cygwin under WinXP.
+        This port is in progress and will be released in a future NuttX release.
+      </li>
+    </ul>
+    </li>
 </ul>
 
 <p>
@@ -621,6 +642,13 @@
     This port use the Zilog z16f2800100zcog development kit and the
     Zilog ZDS-II Windows command line tools.
     The development environment is Cygwin under WinXP.
+  </li>
+
+  <li><code>configs/z8encore000zco</code>
+    z8Encore! Microncontroller.  This port use the Zilog z8encore000zco
+    development kit, Z8F642 part, and the Zilog ZDS-II Windows command line
+    tools.  The development environment is Cygwin under WinXP.
+  </li>
 
   <li><code>configs/z80sim</code>:
     z80 Microcontroller.  This port uses a Z80 instruction set simulator.
diff --git a/arch/z80/src/Makefile b/arch/z80/src/Makefile
index c5f77d180b..39c5697837 100644
--- a/arch/z80/src/Makefile
+++ b/arch/z80/src/Makefile
@@ -40,186 +40,10 @@
 -include chip/Make.defs
 
 ############################################################################
-# Tools
-# CFLAGS, CPPFLAGS, ASFLAGS, LDFLAGS are set in $(TOPDIR)/Make.defs
-
-CFLAGS		+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(TOPDIR)/sched
-CPPFLAGS	+= -D__ASSEMBLY__
-
-############################################################################
-# Files and directories
-
-# There should be one head source (.asm file)
-
-HEAD_AOBJ	= $(HEAD_ASRC:$(ASMEXT)=$(OBJEXT))
-
-# Assembly sources and objects
-
-ASRCS		= $(CHIP_ASRCS) $(CMN_ASRCS)
-AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
-
-# C sources and objects
-
-CSRCS		= $(CHIP_CSRCS) $(CMN_CSRCS)
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-# All sources and objcts
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-# Sources that can have dependencies (no .asm files)
-
-DEPSRCS		= $(CSRCS)
-
-# Directories
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-BOARDDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src/board
-
-VPATH		= chip:common
-
-# Libraries
-
-LIBGCC		= ${shell $(CC) -print-libgcc-file-name}
-
-# Supports dynamic sizing of HEAP.
-#
-HEAP_BASE	= ${shell ./mkhpbase.sh}
-
-############################################################################
-# Targets
-
-all: $(HEAD_AOBJ) libarch$(LIBEXT)
-
-$(AOBJS) $(HEAD_AOBJ): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-# This is a kludge to work around some conflicting symbols in libsdcc.liXqueb
-
-$(SDCCLIBDIR)/myz80.lib: $(SDCCLIBDIR)/$(SDCCLIB)
-	@cat $(SDCCLIBDIR)/$(SDCCLIB) | \
-		grep -v alloc | grep -v free | grep -v printf | \
-		grep -v _str  | grep -v _mem | grep -v crt0\.o \
-		> myz80.lib
-	@sudo mv -f myz80.lib $(SDCCLIBDIR)/myz80.lib
-
-# Create a header file that contains addressing information needed by the code
-
-up_mem.h:
-	@echo "#ifndef __ARCH_MEM_H" >up_mem.h
-	@echo "#define __ARCH_MEM_H" >>up_mem.h
-	@echo "" >>up_mem.h
-	@echo "#define UP_STACK_END           $(CONFIG_DRAM_SIZE)" >> up_mem.h
-	@echo "#define UP_STACK_BASE          (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE))" >> up_mem.h
-	@echo "#define UP_HEAP1_END           UP_STACK_BASE" >> up_mem.h
-	@echo "#define UP_HEAP1_BASE          $(HEAP_BASE)" >> up_mem.h
-	@echo "" >>up_mem.h
-	@echo "#endif /* __ARCH_MEM_H */" >>up_mem.h
-
-asm_mem.h:
-	@echo "	UP_COMPILER_OTHER	== 0" > asm_mem.h
-	@echo "	UP_COMPILER_SDCC	== 1" >> asm_mem.h
-ifeq ($(CC),sdcc)
-	@echo "	UP_COMPILER	== 1" >> asm_mem.h
+# Compiler-Dependent Make
+COMPILER	= ${shell basename $(CC)}
+ifeq ($(COMPILER),sdcc)
+include Makefile.sdcc
 else
-	@echo "	UP_COMPILER	== 0" >> asm_mem.h
+include Makefile.zdsii
 endif
-	@echo "	UP_STACK_END	== ($(CONFIG_DRAM_SIZE) - 1)" >> asm_mem.h
-	@echo "	UP_STACK_BASE	== (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE))" >> asm_mem.h
-	@echo "	UP_HEAP1_END	== (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE) - 1)" >> asm_mem.h
-	@echo "	UP_HEAP1_BASE	== $(HEAP_BASE)" >> asm_mem.h
-
-# Combine all objects in this directory into a library
-
-libarch$(LIBEXT): up_mem.h asm_mem.h $(OBJS)
-	@( for obj in $(OBJS) ; do \
-		$(call ARCHIVE, $@, $${obj}); \
-	done ; )
-
-# This builds the libboard library in the board/ subdirectory 
-
-board/libboard$(LIBEXT):
-	$(MAKE) -C board TOPDIR="$(TOPDIR)" libboard$(LIBEXT)
-
-# This target builds the final executable
-
-pass1.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboard$(LIBEXT)
-	@echo "LD: pass1.ihx"
-	@echo "--" >pass1.lnk				# Non-interactive
-	@echo "-k $(BOARDDIR)" >>pass1.lnk		# Path to board library
-	@echo "-k $(SDCCLIBDIR)" >>pass1.lnk		# Path to SDCC z80 library
-	@echo "-l libboard$(LIBEXT)" >>pass1.lnk	# Name of board library
-	@for LIB in $(LINKLIBS); do \
-		echo "-l $(TOPDIR)/$$LIB" >> pass1.lnk ;\
-	done
-	@echo "-l myz80.lib" >>pass1.lnk		# Name of SDCC z80 library
-	@echo "-b START=0" >>pass1.lnk			# Start of START area
-	@echo "-b _CODE=256" >>pass1.lnk		# Start of _CODE area
-	@echo "-i" >>pass1.lnk				# Intel hex format
-	@echo "-x" >>pass1.lnk				# Hexadecimal
-	@echo "-m" >>pass1.lnk				# Generate a map file
-	@echo "-j" >>pass1.lnk				# Generate a symbol file
-	@echo "pass1.ihx" >>pass1.lnk			# Path to head object
-	@echo "$(HEAD_AOBJ)" >>pass1.lnk		# Path to head object
-	@echo "-e" >>pass1.lnk				# End of script
-	@$(LD) -f pass1.lnk
-	@rm -f up_mem.h asm_mem.h
-	@rm -f up_allocateheap$(OBJEXT) $(HEAD_AOBJ) libarch$(LIBEXT)
-	@$(MAKE) TOPDIR="$(TOPDIR)" libarch$(LIBEXT)
-	@$(MAKE) TOPDIR="$(TOPDIR)" $(HEAD_AOBJ)
-
-nuttx.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboard$(LIBEXT)
-	@echo "LD: nuttx.ihx"
-	@echo "--" >nuttx.lnk				# Non-interactive
-	@echo "-k $(BOARDDIR)" >>nuttx.lnk		# Path to board library
-	@echo "-k $(SDCCLIBDIR)" >>nuttx.lnk		# Path to SDCC z80 library
-	@echo "-l libboard$(LIBEXT)" >>nuttx.lnk	# Name of board library
-	@for LIB in $(LINKLIBS); do \
-		echo "-l $(TOPDIR)/$$LIB" >> nuttx.lnk ;\
-	done
-	@echo "-l myz80.lib" >>nuttx.lnk		# Name of SDCC z80 library
-	@echo "-b START=0" >>nuttx.lnk			# Start of START area
-	@echo "-b _CODE=256" >>nuttx.lnk		# Start of _CODE area
-	@echo "-i" >>nuttx.lnk				# Intel hex format
-	@echo "-x" >>nuttx.lnk				# Hexadecimal
-	@echo "-m" >>nuttx.lnk				# Generate a map file
-	@echo "-j" >>nuttx.lnk				# Generate a symbol file
-	@echo "nuttx.ihx" >>nuttx.lnk			# Path to head object
-	@echo "$(HEAD_AOBJ)" >>nuttx.lnk		# Path to head object
-	@echo "-e" >>nuttx.lnk				# End of script
-	@$(LD) -f nuttx.lnk
-
-nuttx$(EXEEXT): pass1.ihx nuttx.ihx
-	@rm -f pass1.*
-	@packihx nuttx.ihx > $(TOPDIR)/nuttx$(EXEEXT)
-	@cp -f nuttx.map $(TOPDIR)/.
-
-# Build dependencies
-
-.depend: Makefile up_mem.h asm_mem.h chip/Make.defs $(DEPSRCS)
-	@if [ -e board/Makefile ]; then \
-		$(MAKE) -C board TOPDIR="$(TOPDIR)" depend ; \
-	fi
-	@$(MKDEP) --dep-path chip --dep-path common $(CC) -- $(CFLAGS) -- $(DEPSRCS) >Make.dep
-	@touch $@
-
-depend: .depend
-
-clean:
-	@if [ -e board/Makefile ]; then \
-		$(MAKE) -C board TOPDIR="$(TOPDIR)" clean ; \
-	fi
-	@rm -f libarch$(LIBEXT) up_mem.h asm_mem.h pass1.* nuttx.* *~ .*.swp
-	$(call CLEAN)
-
-distclean: clean
-	@if [ -e board/Makefile ]; then \
-		$(MAKE) -C board TOPDIR="$(TOPDIR)" distclean ; \
-	fi
-	rm -f Make.dep .depend
-
--include Make.dep
diff --git a/arch/z80/src/Makefile.sdcc b/arch/z80/src/Makefile.sdcc
new file mode 100644
index 0000000000..d45be7f933
--- /dev/null
+++ b/arch/z80/src/Makefile.sdcc
@@ -0,0 +1,219 @@
+############################################################################
+# arch/z80/src/Makefile.sdcc
+#
+#   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "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
+# COPYRIGHT OWNER OR CONTRIBUTORS 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.
+#
+############################################################################
+
+############################################################################
+# Tools
+# CFLAGS, CPPFLAGS, ASFLAGS, LDFLAGS are set in $(TOPDIR)/Make.defs
+
+CFLAGS		+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(TOPDIR)/sched
+CPPFLAGS	+= -D__ASSEMBLY__
+
+############################################################################
+# Files and directories
+
+# There should be one head source (.asm file)
+
+HEAD_AOBJ	= $(HEAD_ASRC:$(ASMEXT)=$(OBJEXT))
+
+# Assembly sources and objects
+
+ASRCS		= $(CHIP_ASRCS) $(CMN_ASRCS)
+AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
+
+# C sources and objects
+
+CSRCS		= $(CHIP_CSRCS) $(CMN_CSRCS)
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+
+# All sources and objcts
+
+SRCS		= $(ASRCS) $(CSRCS)
+OBJS		= $(AOBJS) $(COBJS)
+
+# Sources that can have dependencies (no .asm files)
+
+DEPSRCS		= $(CSRCS)
+
+# Directories
+
+ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
+BOARDDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src/board
+
+VPATH		= chip:common
+
+# Libraries
+
+LIBGCC		= ${shell $(CC) -print-libgcc-file-name}
+
+# Supports dynamic sizing of HEAP.
+#
+HEAP_BASE	= ${shell ./mkhpbase.sh}
+
+############################################################################
+# Targets
+
+all: $(HEAD_AOBJ) libarch$(LIBEXT)
+
+$(AOBJS) $(HEAD_AOBJ): %$(OBJEXT): %$(ASMEXT)
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+# This is a kludge to work around some conflicting symbols in libsdcc.liXqueb
+
+$(SDCCLIBDIR)/myz80.lib: $(SDCCLIBDIR)/$(SDCCLIB)
+	@cat $(SDCCLIBDIR)/$(SDCCLIB) | \
+		grep -v alloc | grep -v free | grep -v printf | \
+		grep -v _str  | grep -v _mem | grep -v crt0\.o \
+		> myz80.lib
+	@sudo mv -f myz80.lib $(SDCCLIBDIR)/myz80.lib
+
+# Create a header file that contains addressing information needed by the code
+
+up_mem.h:
+	@echo "#ifndef __ARCH_MEM_H" >up_mem.h
+	@echo "#define __ARCH_MEM_H" >>up_mem.h
+	@echo "" >>up_mem.h
+	@echo "#define UP_STACK_END           $(CONFIG_DRAM_SIZE)" >> up_mem.h
+	@echo "#define UP_STACK_BASE          (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE))" >> up_mem.h
+	@echo "#define UP_HEAP1_END           UP_STACK_BASE" >> up_mem.h
+	@echo "#define UP_HEAP1_BASE          $(HEAP_BASE)" >> up_mem.h
+	@echo "" >>up_mem.h
+	@echo "#endif /* __ARCH_MEM_H */" >>up_mem.h
+
+asm_mem.h:
+	@echo "	UP_COMPILER_OTHER	== 0" > asm_mem.h
+	@echo "	UP_COMPILER_SDCC	== 1" >> asm_mem.h
+ifeq ($(CC),sdcc)
+	@echo "	UP_COMPILER	== 1" >> asm_mem.h
+else
+	@echo "	UP_COMPILER	== 0" >> asm_mem.h
+endif
+	@echo "	UP_STACK_END	== ($(CONFIG_DRAM_SIZE) - 1)" >> asm_mem.h
+	@echo "	UP_STACK_BASE	== (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE))" >> asm_mem.h
+	@echo "	UP_HEAP1_END	== (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE) - 1)" >> asm_mem.h
+	@echo "	UP_HEAP1_BASE	== $(HEAP_BASE)" >> asm_mem.h
+
+# Combine all objects in this directory into a library
+
+libarch$(LIBEXT): up_mem.h asm_mem.h $(OBJS)
+	@( for obj in $(OBJS) ; do \
+		$(call ARCHIVE, $@, $${obj}); \
+	done ; )
+
+# This builds the libboard library in the board/ subdirectory 
+
+board/libboard$(LIBEXT):
+	$(MAKE) -C board TOPDIR="$(TOPDIR)" libboard$(LIBEXT)
+
+# This target builds the final executable
+
+pass1.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboard$(LIBEXT)
+	@echo "LD: pass1.ihx"
+	@echo "--" >pass1.lnk				# Non-interactive
+	@echo "-k $(BOARDDIR)" >>pass1.lnk		# Path to board library
+	@echo "-k $(SDCCLIBDIR)" >>pass1.lnk		# Path to SDCC z80 library
+	@echo "-l libboard$(LIBEXT)" >>pass1.lnk	# Name of board library
+	@for LIB in $(LINKLIBS); do \
+		echo "-l $(TOPDIR)/$$LIB" >> pass1.lnk ;\
+	done
+	@echo "-l myz80.lib" >>pass1.lnk		# Name of SDCC z80 library
+	@echo "-b START=0" >>pass1.lnk			# Start of START area
+	@echo "-b _CODE=256" >>pass1.lnk		# Start of _CODE area
+	@echo "-i" >>pass1.lnk				# Intel hex format
+	@echo "-x" >>pass1.lnk				# Hexadecimal
+	@echo "-m" >>pass1.lnk				# Generate a map file
+	@echo "-j" >>pass1.lnk				# Generate a symbol file
+	@echo "pass1.ihx" >>pass1.lnk			# Path to head object
+	@echo "$(HEAD_AOBJ)" >>pass1.lnk		# Path to head object
+	@echo "-e" >>pass1.lnk				# End of script
+	@$(LD) -f pass1.lnk
+	@rm -f up_mem.h asm_mem.h
+	@rm -f up_allocateheap$(OBJEXT) $(HEAD_AOBJ) libarch$(LIBEXT)
+	@$(MAKE) TOPDIR="$(TOPDIR)" libarch$(LIBEXT)
+	@$(MAKE) TOPDIR="$(TOPDIR)" $(HEAD_AOBJ)
+
+nuttx.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboard$(LIBEXT)
+	@echo "LD: nuttx.ihx"
+	@echo "--" >nuttx.lnk				# Non-interactive
+	@echo "-k $(BOARDDIR)" >>nuttx.lnk		# Path to board library
+	@echo "-k $(SDCCLIBDIR)" >>nuttx.lnk		# Path to SDCC z80 library
+	@echo "-l libboard$(LIBEXT)" >>nuttx.lnk	# Name of board library
+	@for LIB in $(LINKLIBS); do \
+		echo "-l $(TOPDIR)/$$LIB" >> nuttx.lnk ;\
+	done
+	@echo "-l myz80.lib" >>nuttx.lnk		# Name of SDCC z80 library
+	@echo "-b START=0" >>nuttx.lnk			# Start of START area
+	@echo "-b _CODE=256" >>nuttx.lnk		# Start of _CODE area
+	@echo "-i" >>nuttx.lnk				# Intel hex format
+	@echo "-x" >>nuttx.lnk				# Hexadecimal
+	@echo "-m" >>nuttx.lnk				# Generate a map file
+	@echo "-j" >>nuttx.lnk				# Generate a symbol file
+	@echo "nuttx.ihx" >>nuttx.lnk			# Path to head object
+	@echo "$(HEAD_AOBJ)" >>nuttx.lnk		# Path to head object
+	@echo "-e" >>nuttx.lnk				# End of script
+	@$(LD) -f nuttx.lnk
+
+nuttx$(EXEEXT): pass1.ihx nuttx.ihx
+	@rm -f pass1.*
+	@packihx nuttx.ihx > $(TOPDIR)/nuttx$(EXEEXT)
+	@cp -f nuttx.map $(TOPDIR)/.
+
+# Build dependencies
+
+.depend: Makefile up_mem.h asm_mem.h chip/Make.defs $(DEPSRCS)
+	@if [ -e board/Makefile ]; then \
+		$(MAKE) -C board TOPDIR="$(TOPDIR)" depend ; \
+	fi
+	@$(MKDEP) --dep-path chip --dep-path common $(CC) -- $(CFLAGS) -- $(DEPSRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	@if [ -e board/Makefile ]; then \
+		$(MAKE) -C board TOPDIR="$(TOPDIR)" clean ; \
+	fi
+	@rm -f libarch$(LIBEXT) up_mem.h asm_mem.h pass1.* nuttx.* *~ .*.swp
+	$(call CLEAN)
+
+distclean: clean
+	@if [ -e board/Makefile ]; then \
+		$(MAKE) -C board TOPDIR="$(TOPDIR)" distclean ; \
+	fi
+	rm -f Make.dep .depend
+
+-include Make.dep
diff --git a/arch/z80/src/Makefile.zdsii b/arch/z80/src/Makefile.zdsii
new file mode 100644
index 0000000000..afe32ca90a
--- /dev/null
+++ b/arch/z80/src/Makefile.zdsii
@@ -0,0 +1,126 @@
+############################################################################
+# arch/z16/src/Makefile
+#
+#   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "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
+# COPYRIGHT OWNER OR CONTRIBUTORS 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.
+#
+############################################################################
+
+############################################################################
+# Tools
+ARCHSRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
+WARCHSRCDIR	= ${shell cygpath -w $(ARCHSRCDIR)}
+USRINCLUDES	= -usrinc:'.;$(WTOPDIR)\sched;$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
+INCLUDES	= $(ARCHSTDINCLUDES) $(USRINCLUDES)
+CFLAGS		= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES)
+CPPFLAGS	+= -I$(ARCHSRCDIR)
+LDFLAGS 	= @"${shell cygpath -w $(ARCHSRCDIR)/nuttx.linkcmd}"
+
+############################################################################
+# Files and directories
+HEAD_ASRC	= $(HEAD_SSRC:.S=$(ASMEXT))
+HEAD_AOBJ	= $(HEAD_SSRC:.S=$(OBJEXT))
+
+SSRCS		= $(CHIP_SSRCS) $(CMN_SSRCS)
+ASRCS		= $(SSRCS:.S=$(ASMEXT))
+AOBJS		= $(SSRCS:.S=$(OBJEXT))
+
+CSRCS		= $(CHIP_CSRCS) $(CMN_CSRCS)
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+
+DEPSRCS 	= $(SSRCS) $(CSRCS)
+OBJS		= $(AOBJS) $(COBJS)
+
+BOARDDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src/board
+
+VPATH		= chip:common
+
+############################################################################
+# Targets
+all: $(HEAD_OBJ) libarch$(LIBEXT)
+
+$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
+	@$(CPP) $(CPPFLAGS) $< -o $@.tmp
+	@cat $@.tmp | sed -e "s/^#/;/g" > $@
+	@rm $@.tmp
+
+$(AOBJS) $(HEAD_AOBJ): %$(OBJEXT): %$(ASMEXT)
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, `cygpath -w $<`, $@)
+
+libarch$(LIBEXT): $(OBJS)
+	@( for obj in $(OBJS) ; do \
+		$(call ARCHIVE, $@, $${obj}); \
+	done ; )
+
+board/libboard$(LIBEXT):
+	@$(MAKE) -C board TOPDIR="$(TOPDIR)" libboard$(LIBEXT)
+
+nuttx.linkcmd: $(LINKCMDTEMPLATE)
+	@cp -f $(LINKCMDTEMPLATE) nuttx.linkcmd
+	@echo "\"${shell cygpath -w $(TOPDIR)/nuttx}\"= \\" >>nuttx.linkcmd
+	@echo "  \"${shell cygpath -w $(ARCHSRCDIR)/$(HEAD_AOBJ)}\", \\" >>nuttx.linkcmd
+	@( for lib in $(LINKLIBS); do \
+		echo "  \"`cygpath -w $(TOPDIR)/$${lib}`\", \\" >>nuttx.linkcmd; \
+	done ; )
+	@echo "  \"${shell cygpath -w $(ARCHSRCDIR)/board/libboard$(LIBEXT)}\", \\"  >>nuttx.linkcmd
+	@echo "  \"${shell cygpath -w $(ZDSSTDLIBDIR)/chelpld$(LIBEXT)}\", \\"  >>nuttx.linkcmd
+	@echo "  \"${shell cygpath -w $(ZDSSTDLIBDIR)/fpld$(LIBEXT)}\""  >>nuttx.linkcmd
+
+nuttx$(EXEEXT): $(HEAD_AOBJ) board/libboard$(LIBEXT) nuttx.linkcmd
+	@echo "LD:  nuttx.hex"
+	@$(LD) $(LDFLAGS)
+
+.depend: Makefile chip/Make.defs $(DEPSRCS)
+	@if [ -e board/Makefile ]; then \
+		$(MAKE) -C board TOPDIR="$(TOPDIR)" depend ; \
+	fi
+	@$(MKDEP) --dep-path chip --dep-path common $(CC) -- $(CFLAGS) -- $(DEPSRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	@if [ -e board/Makefile ]; then \
+		$(MAKE) -C board TOPDIR="$(TOPDIR)" clean ; \
+	fi
+	@rm -f libarch$(LIBEXT) *~ .*.swp
+	@rm -f nuttx.linkcmd *.asm *.tmp *.map
+	$(call CLEAN)
+
+distclean: clean
+	@if [ -e board/Makefile ]; then \
+		$(MAKE) -C board TOPDIR="$(TOPDIR)" distclean ; \
+	fi
+	@rm -f Make.dep .depend
+
+-include Make.dep
diff --git a/arch/z80/src/z80/Make.defs b/arch/z80/src/z80/Make.defs
index 0688d159b3..1d4d5c29ed 100644
--- a/arch/z80/src/z80/Make.defs
+++ b/arch/z80/src/z80/Make.defs
@@ -1,7 +1,7 @@
 ############################################################################
-# sdcc/src/z80/Make.defs
+# arch/z80/src/z80/Make.defs
 #
-#   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -14,7 +14,7 @@
 #    notice, this list of conditions and the following disclaimer in
 #    the documentation and/or other materials provided with the
 #    distribution.
-# 3. Neither the name Gregory Nutt nor the names of its contributors may be
+# 3. Neither the name NuttX nor the names of its contributors may be
 #    used to endorse or promote products derived from this software
 #    without specific prior written permission.
 #
@@ -33,9 +33,9 @@
 #
 ############################################################################
 
-HEAD_ASRC	= up_head.asm
+HEAD_ASRC	= z80_head.asm
 
-CMN_ASRCS	= up_saveusercontext.asm up_restoreusercontext.asm
+CMN_ASRCS	= 
 CMN_CSRCS	= up_initialize.c up_allocateheap.c up_initialstate.c \
 		  up_createstack.c up_releasestack.c up_interruptcontext.c \
 		  up_blocktask.c  up_unblocktask.c up_exit.c up_releasepending.c \
@@ -44,6 +44,6 @@ CMN_CSRCS	= up_initialize.c up_allocateheap.c up_initialstate.c \
 		  up_schedulesigaction.c up_sigdeliver.c \
 		  up_registerdump.c up_usestack.c
 
-CHIP_ASRCS	= 
+CHIP_ASRCS	= z80_saveusercontext.asm z80_restoreusercontext.asm
 CHIP_CSRCS	= 
 
diff --git a/arch/z80/src/common/up_head.asm b/arch/z80/src/z80/z80_head.asm
similarity index 96%
rename from arch/z80/src/common/up_head.asm
rename to arch/z80/src/z80/z80_head.asm
index 6ebbe2ba44..816cab347a 100644
--- a/arch/z80/src/common/up_head.asm
+++ b/arch/z80/src/z80/z80_head.asm
@@ -1,5 +1,5 @@
 ;**************************************************************************
-; arch/z80/src/common/up_head.asm
+; arch/z80/src/z80/z80_head.asm
 ;
 ;   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
 ;   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/arch/z80/src/common/up_restoreusercontext.asm b/arch/z80/src/z80/z80_restoreusercontext.asm
similarity index 96%
rename from arch/z80/src/common/up_restoreusercontext.asm
rename to arch/z80/src/z80/z80_restoreusercontext.asm
index 5d34278c2c..5807fa811e 100644
--- a/arch/z80/src/common/up_restoreusercontext.asm
+++ b/arch/z80/src/z80/z80_restoreusercontext.asm
@@ -1,5 +1,5 @@
 ;**************************************************************************
-; common/up_restoreusercontext.asm
+; arch/z80/src/z80/z80_restoreusercontext.asm
 ;
 ;   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
 ;   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/arch/z80/src/common/up_saveusercontext.asm b/arch/z80/src/z80/z80_saveusercontext.asm
similarity index 96%
rename from arch/z80/src/common/up_saveusercontext.asm
rename to arch/z80/src/z80/z80_saveusercontext.asm
index bd8f548315..886872f37a 100644
--- a/arch/z80/src/common/up_saveusercontext.asm
+++ b/arch/z80/src/z80/z80_saveusercontext.asm
@@ -1,7 +1,7 @@
 ;*************************************************************************
-; common/up_saveusercontext.asm
+; arch/z80/src/z80/z80_saveusercontext.asm
 ;
-;   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+;   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
 ;   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 ;
 ; Redistribution and use in source and binary forms, with or without
@@ -14,7 +14,7 @@
 ;    notice, this list of conditions and the following disclaimer in
 ;    the documentation and/or other materials provided with the
 ;    distribution.
-; 3. Neither the name Gregory Nutt nor the names of its contributors may be
+; 3. Neither the name NuttX nor the names of its contributors may be
 ;    used to endorse or promote products derived from this software
 ;    without specific prior written permission.
 ;
diff --git a/configs/README.txt b/configs/README.txt
index e7675a947f..6646c6964c 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -338,6 +338,11 @@ configs/z16f2800100zcog
     development kit and the Zilog ZDS-II Windows command line tools.  The
     development environment is Cygwin under WinXP.
 
+configs/z8encore000zco
+    z8Encore! Microncontroller.  This port use the Zilog z8encore000zco
+    development kit, Z8F642 part, and the Zilog ZDS-II Windows command line
+    tools.  The development environment is Cygwin under WinXP.
+
 configs/z80zim
     z80 Microcontroller.  This port uses a Z80 instruction set simulator.
     That simulator can be found in the NuttX CVS at
diff --git a/configs/z16f2800100zcog/ostest/setenv.sh b/configs/z16f2800100zcog/ostest/setenv.sh
index 4a9bf1d3bc..9651536bd0 100755
--- a/configs/z16f2800100zcog/ostest/setenv.sh
+++ b/configs/z16f2800100zcog/ostest/setenv.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# z16f2800100zcog/setenv.sh
+# configs/z16f2800100zcog/ostest/setenv.sh
 #
 #   Copyright (C) 2008 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -48,4 +48,4 @@ ZDSBINDIR="C:/Program\ Files/ZiLOG/ZDSII_ZNEO_4.11.0/bin"
 alias zneoasm="${ZDSBINDIR}/zneoasm.exe"
 alias zneocc="${ZDSBINDIR}/zneocc.exe"
 alias zneolib="${ZDSBINDIR}/zneolib.exe"
-alias zneolink="${ZDSBINDIR}/zneolink.exe"
\ No newline at end of file
+alias zneolink="${ZDSBINDIR}/zneolink.exe"
diff --git a/configs/z16f2800100zcog/src/z16f_leds.c b/configs/z16f2800100zcog/src/z16f_leds.c
index 49e47282e8..612e7a86ba 100644
--- a/configs/z16f2800100zcog/src/z16f_leds.c
+++ b/configs/z16f2800100zcog/src/z16f_leds.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * up_leds.c
+ * configs/z16f2800100zcog/z16f_leds.c
  *
  *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>