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diff --git a/trunk/src/emu/machine/x2212.h b/trunk/src/emu/machine/x2212.h
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+/***************************************************************************
+
+ x2212.h
+
+ Xicor X2212 256 x 4 bit Nonvolatile Static RAM.
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __X2212_H__
+#define __X2212_H__
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_X2212_ADD(_tag) \
+ MCFG_DEVICE_ADD(_tag, X2212, 0) \
+
+// some systems (like many early Atari games) wire up the /STORE signal
+// to fire on power-down, effectively creating an "auto-save" functionality
+#define MCFG_X2212_ADD_AUTOSAVE(_tag) \
+ MCFG_DEVICE_ADD(_tag, X2212, 0) \
+ x2212_device::static_set_auto_save(*device); \
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+
+// ======================> x2212_device
+
+class x2212_device : public device_t,
+ public device_memory_interface,
+ public device_nvram_interface
+{
+public:
+ // construction/destruction
+ x2212_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // inline configuration helpers
+ static void static_set_auto_save(device_t &device);
+
+ // I/O operations
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+
+ DECLARE_WRITE_LINE_MEMBER( store );
+ DECLARE_WRITE_LINE_MEMBER( recall );
+
+protected:
+ // internal helpers
+ void store();
+ void recall();
+
+ // device-level overrides
+ virtual void device_start();
+
+ // device_memory_interface overrides
+ virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const;
+
+ // device_nvram_interface overrides
+ virtual void nvram_default();
+ virtual void nvram_read(emu_file &file);
+ virtual void nvram_write(emu_file &file);
+
+ static const int SIZE_DATA = 0x100;
+
+ // configuration state
+ bool m_auto_save;
+
+ // device-specific configuration
+ address_space_config m_sram_space_config;
+ address_space_config m_e2prom_space_config;
+
+ // internal state
+ address_space * m_sram;
+ address_space * m_e2prom;
+
+ bool m_store;
+ bool m_array_recall;
+};
+
+
+// device type definition
+extern const device_type X2212;
+
+
+#endif