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

    American Speedway

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

class amspdwy_state : public driver_device
{
public:
	amspdwy_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) ,
		m_videoram(*this, "videoram"),
		m_spriteram(*this, "spriteram"),
		m_colorram(*this, "colorram"){ }

	/* memory pointers */
	required_shared_ptr<UINT8> m_videoram;
	required_shared_ptr<UINT8> m_spriteram;
	required_shared_ptr<UINT8> m_colorram;
//  UINT8 *    paletteram;  // currently this uses generic palette handling

	/* video-related */
	tilemap_t    *m_bg_tilemap;
	int        m_flipscreen;

	/* misc */
	UINT8      m_wheel_old[2];
	UINT8      m_wheel_return[2];

	/* devices */
	cpu_device *m_audiocpu;
	DECLARE_READ8_MEMBER(amspdwy_wheel_0_r);
	DECLARE_READ8_MEMBER(amspdwy_wheel_1_r);
	DECLARE_WRITE8_MEMBER(amspdwy_sound_w);
	DECLARE_READ8_MEMBER(amspdwy_port_r);
	DECLARE_WRITE8_MEMBER(amspdwy_paletteram_w);
	DECLARE_WRITE8_MEMBER(amspdwy_flipscreen_w);
	DECLARE_WRITE8_MEMBER(amspdwy_videoram_w);
	DECLARE_WRITE8_MEMBER(amspdwy_colorram_w);
	DECLARE_READ8_MEMBER(amspdwy_sound_r);
	TILE_GET_INFO_MEMBER(get_tile_info);
	TILEMAP_MAPPER_MEMBER(tilemap_scan_cols_back);
};


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


VIDEO_START( amspdwy );
SCREEN_UPDATE_IND16( amspdwy );