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

    Atari Ultra Tank hardware

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

#include "sound/discrete.h"

class ultratnk_state : public driver_device
{
public:
	enum
	{
		TIMER_NMI
	};

	ultratnk_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_videoram(*this, "videoram"),
		m_maincpu(*this, "maincpu"),
		m_discrete(*this, "discrete"),
		m_gfxdecode(*this, "gfxdecode") { }

	required_shared_ptr<UINT8> m_videoram;
	int m_da_latch;
	int m_collision[4];
	tilemap_t* m_playfield;
	bitmap_ind16 m_helper;
	DECLARE_READ8_MEMBER(ultratnk_wram_r);
	DECLARE_READ8_MEMBER(ultratnk_analog_r);
	DECLARE_READ8_MEMBER(ultratnk_coin_r);
	DECLARE_READ8_MEMBER(ultratnk_collision_r);
	DECLARE_READ8_MEMBER(ultratnk_options_r);
	DECLARE_WRITE8_MEMBER(ultratnk_wram_w);
	DECLARE_WRITE8_MEMBER(ultratnk_collision_reset_w);
	DECLARE_WRITE8_MEMBER(ultratnk_da_latch_w);
	DECLARE_WRITE8_MEMBER(ultratnk_led_1_w);
	DECLARE_WRITE8_MEMBER(ultratnk_led_2_w);
	DECLARE_WRITE8_MEMBER(ultratnk_lockout_w);
	DECLARE_WRITE8_MEMBER(ultratnk_video_ram_w);
	DECLARE_CUSTOM_INPUT_MEMBER(get_collision);
	DECLARE_CUSTOM_INPUT_MEMBER(get_joystick);
	DECLARE_WRITE8_MEMBER(ultratnk_fire_1_w);
	DECLARE_WRITE8_MEMBER(ultratnk_fire_2_w);
	DECLARE_WRITE8_MEMBER(ultratnk_attract_w);
	DECLARE_WRITE8_MEMBER(ultratnk_explosion_w);
	TILE_GET_INFO_MEMBER(ultratnk_tile_info);
	virtual void machine_reset();
	virtual void video_start();
	DECLARE_PALETTE_INIT(ultratnk);
	UINT32 screen_update_ultratnk(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	void screen_eof_ultratnk(screen_device &screen, bool state);
	TIMER_CALLBACK_MEMBER(nmi_callback);
	required_device<cpu_device> m_maincpu;
	required_device<discrete_device> m_discrete;
	required_device<gfxdecode_device> m_gfxdecode;

protected:
	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
};