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diff --git a/src/emu/machine/mos6702.h b/src/emu/machine/mos6702.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ MOS Technology 6702 Mystery Device emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+ _____ _____
+ R/_W 1 |* \_/ | 20 Vcc
+ D7 2 | | 19 CS0
+ D6 3 | | 18 CS1
+ D5 4 | | 17 CS2
+ D4 5 | MOS6702 | 16 CS3
+ D3 6 | | 15 _CS4
+ D2 7 | | 14 _CS5
+ D1 8 | | 13 _CS5
+ D0 9 | | 12 _RTS
+ Vss 10 |_____________| 11 phi2
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __MOS6702__
+#define __MOS6702__
+
+#include "emu.h"
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_MOS6702_ADD(_tag, _clock) \
+ MCFG_DEVICE_ADD(_tag, MOS6702, _clock)
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> mos6702_device
+
+class mos6702_device : public device_t
+{
+public:
+ // construction/destruction
+ mos6702_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+};
+
+
+// device type definition
+extern const device_type MOS6702;
+
+
+
+#endif