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

    Aeroboto

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

class aeroboto_state : public driver_device
{
public:
	aeroboto_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) ,
		m_mainram(*this, "mainram"),
		m_videoram(*this, "videoram"),
		m_hscroll(*this, "hscroll"),
		m_tilecolor(*this, "tilecolor"),
		m_spriteram(*this, "spriteram"),
		m_vscroll(*this, "vscroll"),
		m_starx(*this, "starx"),
		m_stary(*this, "stary"),
		m_bgcolor(*this, "bgcolor"){ }

	/* memory pointers */
	required_shared_ptr<UINT8> m_mainram;
	required_shared_ptr<UINT8> m_videoram;
	required_shared_ptr<UINT8> m_hscroll;
	required_shared_ptr<UINT8> m_tilecolor;
	required_shared_ptr<UINT8> m_spriteram;
	required_shared_ptr<UINT8> m_vscroll;
	required_shared_ptr<UINT8> m_starx;
	required_shared_ptr<UINT8> m_stary;
	required_shared_ptr<UINT8> m_bgcolor;

	/* stars layout */
	UINT8 * m_stars_rom;
	int     m_stars_length;

	/* video-related */
	tilemap_t *m_bg_tilemap;
	int     m_charbank;
	int     m_starsoff;
	int     m_sx;
	int     m_sy;
	UINT8   m_ox;
	UINT8   m_oy;

	/* misc */
	int m_count;
	int m_disable_irq;
	DECLARE_READ8_MEMBER(aeroboto_201_r);
	DECLARE_READ8_MEMBER(aeroboto_irq_ack_r);
	DECLARE_READ8_MEMBER(aeroboto_2973_r);
	DECLARE_WRITE8_MEMBER(aeroboto_1a2_w);
	DECLARE_READ8_MEMBER(aeroboto_in0_r);
	DECLARE_WRITE8_MEMBER(aeroboto_3000_w);
	DECLARE_WRITE8_MEMBER(aeroboto_videoram_w);
	DECLARE_WRITE8_MEMBER(aeroboto_tilecolor_w);
	TILE_GET_INFO_MEMBER(get_tile_info);
	virtual void machine_start();
	virtual void machine_reset();
	virtual void video_start();
	UINT32 screen_update_aeroboto(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
};


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