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diff --git a/nuttx/arch/z80/src/z180/z180_serial.h b/nuttx/arch/z80/src/z180/z180_serial.h
new file mode 100644
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+++ b/nuttx/arch/z80/src/z180/z180_serial.h
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+/****************************************************************************
+ * arch/z80/src/z180/z180_serial.h
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_Z80_SRC_Z180_Z180_SERIAL_H
+#define __ARCH_Z80_SRC_Z180_Z180_SERIAL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "up_internal.h"
+#include "z180_config.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+ /****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: z180_uart_lowinit
+ *
+ * Description:
+ *   Called early in the boot sequence to initialize the UART(s)
+ *
+ ****************************************************************************/
+
+#ifdef HAVE_UART
+void z180_uart_lowinit(void);
+#else
+#  define z180_uart_lowinit()
+#endif
+
+/****************************************************************************
+ * Name: z180_scc_lowinit
+ *
+ * Description:
+ *   Called early in the boot sequence to initialize the [E]SCC channel(s)
+ *
+ ****************************************************************************/
+
+#ifdef HAVE_SCC
+void z180_scc_lowinit(void);
+#else
+#  define z180_scc_lowinit()
+#endif
+
+/****************************************************************************
+ * Name: z180_putc
+ *
+ * Description:
+ *   Low-level character output
+ *
+ ****************************************************************************/
+
+void z180_putc(uint8_t ch) __naked;
+
+/****************************************************************************
+ * Name: up_putc/up_lowputc
+ *
+ * Description:
+ *   Low-level console output
+ *
+ ****************************************************************************/
+
+#ifdef USE_SERIALDRIVER
+int up_lowputc(int ch);
+#else
+int up_putc(int ch);
+#  define up_lowputc(ch) up_putc(ch)
+#endif
+
+#endif /* __ARCH_Z80_SRC_Z180_Z180_SERIAL_H */