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

    Metro Games

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

#include "sound/okim6295.h"
#include "sound/2151intf.h"
#include "video/konicdev.h"

class metro_state : public driver_device
{
public:
	metro_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_ymsnd(*this, "ymsnd"),
		  m_k053936(*this, "k053936") { }

	/* memory pointers */
	UINT16 *    m_vram_0;
	UINT16 *    m_vram_1;
	UINT16 *    m_vram_2;
	UINT16 *    m_spriteram;
	UINT16 *    m_tiletable;
	UINT16 *    m_tiletable_old;
	UINT16 *    m_blitter_regs;
	UINT16 *    m_scroll;
	UINT16 *    m_window;
	UINT16 *    m_irq_enable;
	UINT16 *    m_irq_levels;
	UINT16 *    m_irq_vectors;
	UINT16 *    m_rombank;
	UINT16 *    m_videoregs;
	UINT16 *    m_screenctrl;
	UINT16 *    m_input_sel;
	UINT16 *    m_k053936_ram;

	size_t      m_spriteram_size;
	size_t      m_tiletable_size;

	int         m_flip_screen;

	/* video-related */
	tilemap_t   *m_k053936_tilemap;
	int         m_bg_tilemap_enable[3];
	int         m_bg_tilemap_enable16[3];
	int         m_bg_tilemap_scrolldx[3];

	int         m_support_8bpp;
	int         m_support_16x16;
	int         m_has_zoom;
	int         m_sprite_xoffs;
	int         m_sprite_yoffs;

	/* blitter */
	int         m_blitter_bit;

	/* irq_related */
	int         m_irq_line;
	UINT8       m_requested_int[8];
	emu_timer   *m_mouja_irq_timer;

	/* sound related */
	UINT16      m_soundstatus;
	int         m_porta;
	int         m_portb;
	int         m_busy_sndcpu;

	/* misc */
	int         m_gakusai_oki_bank_lo;
	int         m_gakusai_oki_bank_hi;

	/* devices */
	required_device<cpu_device> m_maincpu;
	optional_device<cpu_device> m_audiocpu;
	optional_device<okim6295_device> m_oki;
	optional_device<device_t> m_ymsnd;
	optional_device<k053936_device> m_k053936;
};


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

WRITE16_HANDLER( metro_window_w );
WRITE16_HANDLER( metro_vram_0_w );
WRITE16_HANDLER( metro_vram_1_w );
WRITE16_HANDLER( metro_vram_2_w );
WRITE16_HANDLER( metro_k053936_w );

VIDEO_START( metro_14100 );
VIDEO_START( metro_14220 );
VIDEO_START( metro_14300 );
VIDEO_START( blzntrnd );
VIDEO_START( gstrik2 );

SCREEN_UPDATE( metro );

void metro_draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect);