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#include "sound/okim6295.h"

class shadfrce_state : public driver_device
{
public:
	shadfrce_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_audiocpu(*this, "audiocpu"),
		m_oki(*this, "oki"),
		m_gfxdecode(*this, "gfxdecode"),
		m_screen(*this, "screen"),
		m_palette(*this, "palette"),
		m_fgvideoram(*this, "fgvideoram"),
		m_bg0videoram(*this, "bg0videoram"),
		m_bg1videoram(*this, "bg1videoram"),
		m_spvideoram(*this, "spvideoram") { }

	required_device<cpu_device> m_maincpu;
	required_device<cpu_device> m_audiocpu;
	required_device<okim6295_device> m_oki;
	required_device<gfxdecode_device> m_gfxdecode;
	required_device<screen_device> m_screen;
	required_device<palette_device> m_palette;

	required_shared_ptr<UINT16> m_fgvideoram;
	required_shared_ptr<UINT16> m_bg0videoram;
	required_shared_ptr<UINT16> m_bg1videoram;
	required_shared_ptr<UINT16> m_spvideoram;

	UINT16 *m_spvideoram_old;
	tilemap_t *m_fgtilemap;
	tilemap_t *m_bg0tilemap;
	tilemap_t *m_bg1tilemap;
	int m_video_enable;
	int m_irqs_enable;
	int m_raster_scanline;
	int m_raster_irq_enable;
	int m_vblank;
	int m_prev_value;

	DECLARE_WRITE16_MEMBER(flip_screen);
	DECLARE_READ16_MEMBER(input_ports_r);
	DECLARE_WRITE16_MEMBER(sound_brt_w);
	DECLARE_WRITE16_MEMBER(irq_ack_w);
	DECLARE_WRITE16_MEMBER(irq_w);
	DECLARE_WRITE16_MEMBER(scanline_w);
	DECLARE_WRITE16_MEMBER(fgvideoram_w);
	DECLARE_WRITE16_MEMBER(bg0videoram_w);
	DECLARE_WRITE16_MEMBER(bg1videoram_w);
	DECLARE_WRITE16_MEMBER(bg0scrollx_w);
	DECLARE_WRITE16_MEMBER(bg0scrolly_w);
	DECLARE_WRITE16_MEMBER(bg1scrollx_w);
	DECLARE_WRITE16_MEMBER(bg1scrolly_w);
	DECLARE_WRITE8_MEMBER(oki_bankswitch_w);

	TILE_GET_INFO_MEMBER(get_fgtile_info);
	TILE_GET_INFO_MEMBER(get_bg0tile_info);
	TILE_GET_INFO_MEMBER(get_bg1tile_info);

	virtual void video_start();
	
	TIMER_DEVICE_CALLBACK_MEMBER(scanline);

	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	void screen_eof(screen_device &screen, bool state);
	void draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect );
};