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diff --git a/src/mame/machine/pc9801_86.h b/src/mame/machine/pc9801_86.h
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+// license:BSD-3-Clause
+// copyright-holders:Angelo Salese
+/***************************************************************************
+
+ NEC PC-9801-86
+
+***************************************************************************/
+
+
+#pragma once
+
+#ifndef __PC9801_86DEV_H__
+#define __PC9801_86DEV_H__
+
+#include "machine/pic8259.h"
+#include "sound/2608intf.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> pc9801_86_device
+
+class pc9801_86_device : public device_t
+{
+public:
+ // construction/destruction
+ pc9801_86_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // optional information overrides
+ virtual machine_config_constructor device_mconfig_additions() const;
+ virtual ioport_constructor device_input_ports() const;
+
+ DECLARE_READ8_MEMBER(opn_porta_r);
+ DECLARE_WRITE8_MEMBER(opn_portb_w);
+ DECLARE_READ8_MEMBER(pc9801_86_r);
+ DECLARE_WRITE8_MEMBER(pc9801_86_w);
+ DECLARE_WRITE_LINE_MEMBER(pc9801_sound_irq);
+// DECLARE_READ8_MEMBER(pc9801_86_ext_r);
+// DECLARE_WRITE8_MEMBER(pc9801_86_ext_w);
+
+// required_device<cpu_device> m_maincpu;
+ required_device<ym2608_device> m_opna;
+ virtual const rom_entry *device_rom_region() const;
+protected:
+ // device-level overrides
+ virtual void device_validity_check(validity_checker &valid) const;
+ virtual void device_start();
+ virtual void device_reset();
+ void install_device(offs_t start, offs_t end, offs_t mask, offs_t mirror, read8_delegate rhandler, write8_delegate whandler);
+
+private:
+ UINT8 m_joy_sel;
+
+};
+
+
+// device type definition
+extern const device_type PC9801_86;
+
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+
+
+#endif