diff --git a/configs/z16f2800100zcog/src/Makefile b/configs/z16f2800100zcog/src/Makefile
index 33ac4263bc..0de50c802e 100644
--- a/configs/z16f2800100zcog/src/Makefile
+++ b/configs/z16f2800100zcog/src/Makefile
@@ -43,7 +43,7 @@ CFLAGS		= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCH
 
 ASRCS		= 
 AOBJS		= $(ASRCS:.S=$(OBJEXT))
-CSRCS		= 
+CSRCS		= z16_lowinit.c
 COBJS		= $(CSRCS:.c=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS)
diff --git a/configs/z16f2800100zcog/src/z16f_lowinit.c b/configs/z16f2800100zcog/src/z16f_lowinit.c
new file mode 100644
index 0000000000..258cb4630a
--- /dev/null
+++ b/configs/z16f2800100zcog/src/z16f_lowinit.c
@@ -0,0 +1,81 @@
+/***************************************************************************
+ * configs/z16f2800100zcog/src/z16f_lowinit.c
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Based upon sample code included with the Zilog ZDS-II toolchain.
+ *
+ * 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.
+ *
+ ***************************************************************************/
+
+/***************************************************************************
+ * Included Files
+ ***************************************************************************/
+
+/***************************************************************************
+ * Definitions
+ ***************************************************************************/
+
+/***************************************************************************
+ * Private Functions
+ ***************************************************************************/
+
+static void z16f_gpioinit(void)
+{
+  /* Configure LEDs and Run/Stop switch port */
+
+  putreg(getreg(Z16F_GPIOA_DD) | 0x87, Z16F_GPIOA_DD);
+  putreg(getreg(Z16F_GPIOA_OUT) | 0x07, Z16F_GPIOA_OUT);
+  putreg(getreg(Z16F_GPIOA_DD) | 0xF8, Z16F_GPIOA_DD);
+
+  /* Configure rate switch port */
+
+  putreg(getreg(Z16F_GPIOB_DD) | 0x20, Z16F_GPIOB_DD);
+  putreg(getreg(Z16F_GPIOB_AFL) | 0x20, Z16F_GPIOB_AFL);
+
+#if 0 /* Not yet */
+  ADC0MAX = 0x05;
+  ADC0CTL = 0xF5;
+#endif
+
+  /* Configure Direction switch port */
+
+  putreg(getreg() | 0x01, Z16F_GPIOC_DD);
+}
+
+/***************************************************************************
+ * Public Functions
+ ***************************************************************************/
+
+void z16f_lowinit(void)
+{
+  z16f_gpioinit();
+}
+