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diff --git a/trunk/src/emu/machine/nmc9306.h b/trunk/src/emu/machine/nmc9306.h
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+/**********************************************************************
+
+ National Semiconductor NMC9306 256-Bit Serial EEPROM emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+ _____ _____
+ CS 1 |* \_/ | 8 Vcc
+ SK 2 | | 7 NC
+ DI 3 | | 6 NC
+ DO 4 |_____________| 5 GND
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __NMC9306__
+#define __NMC9306__
+
+#include "emu.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_NMC9306_ADD(_tag) \
+ MCFG_DEVICE_ADD(_tag, NMC9306, 0)
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+
+// ======================> nmc9306_device
+
+class nmc9306_device : public device_t,
+ public device_nvram_interface
+{
+public:
+ // construction/destruction
+ nmc9306_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ DECLARE_WRITE_LINE_MEMBER( cs_w );
+ DECLARE_WRITE_LINE_MEMBER( sk_w );
+ DECLARE_WRITE_LINE_MEMBER( di_w );
+ DECLARE_READ_LINE_MEMBER( do_r );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+
+ // device_nvram_interface overrides
+ virtual void nvram_default();
+ virtual void nvram_read(emu_file &file);
+ virtual void nvram_write(emu_file &file);
+
+private:
+ inline UINT16 read(offs_t offset);
+ inline void write(offs_t offset, UINT16 data);
+ inline void erase(offs_t offset);
+
+ UINT16 m_register[16];
+
+ int m_bits;
+ int m_state;
+ UINT8 m_command;
+ UINT8 m_address;
+ UINT16 m_data;
+ bool m_ewen;
+ int m_cs;
+ int m_sk;
+ int m_do;
+ int m_di;
+};
+
+
+// device type definition
+extern const device_type NMC9306;
+
+
+#endif