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/*************************************************************************

    Yun Sung 8 Bit Games

*************************************************************************/

class yunsung8_state : public driver_device
{
public:
	yunsung8_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) { }

	/* video-related */
	tilemap_t     *m_tilemap_0;
	tilemap_t     *m_tilemap_1;
	UINT8       *m_videoram_0;
	UINT8       *m_videoram_1;
	int         m_layers_ctrl;
	int         m_videobank;

	/* misc */
	int         m_adpcm;
	int         m_toggle;

	/* devices */
	cpu_device *m_audiocpu;

	/* memory */
	UINT8      m_videoram[0x4000];
	DECLARE_WRITE8_MEMBER(yunsung8_bankswitch_w);
	DECLARE_WRITE8_MEMBER(yunsung8_adpcm_w);
	DECLARE_WRITE8_MEMBER(yunsung8_videobank_w);
	DECLARE_READ8_MEMBER(yunsung8_videoram_r);
	DECLARE_WRITE8_MEMBER(yunsung8_videoram_w);
	DECLARE_WRITE8_MEMBER(yunsung8_flipscreen_w);
	DECLARE_WRITE8_MEMBER(yunsung8_sound_bankswitch_w);
	TILE_GET_INFO_MEMBER(get_tile_info_0);
	TILE_GET_INFO_MEMBER(get_tile_info_1);
	virtual void machine_start();
	virtual void machine_reset();
	virtual void video_start();
	UINT32 screen_update_yunsung8(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
};


/*----------- defined in video/yunsung8.c -----------*/