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

    SNK/Alpha 68000 based games

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

class alpha68k_state : public driver_device
{
public:
	alpha68k_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_shared_ram(*this, "shared_ram"),
		m_spriteram(*this, "spriteram"),
		m_videoram(*this, "videoram"),
		m_audiocpu(*this, "audiocpu"),
		m_maincpu(*this, "maincpu"),
		m_gfxdecode(*this, "gfxdecode"),
		m_palette(*this, "palette") { }

	/* memory pointers */
	optional_shared_ptr<UINT16> m_shared_ram;
	required_shared_ptr<UINT16> m_spriteram;
	optional_shared_ptr<UINT16> m_videoram;

	/* video-related */
	tilemap_t     *m_fix_tilemap;
	int         m_bank_base;
	int         m_flipscreen;
	int         m_last_bank;
	int         m_buffer_28;
	int         m_buffer_60;
	int         m_buffer_68;

	/* misc */
	int         m_invert_controls;
	int         m_microcontroller_id;
	int         m_coin_id;
	unsigned    m_trigstate;
	unsigned    m_deposits1;
	unsigned    m_deposits2;
	unsigned    m_credits;
	unsigned    m_coinvalue;
	unsigned    m_microcontroller_data;
	int         m_latch;
	unsigned    m_game_id;  // see below

	/* devices */
	required_device<cpu_device> m_audiocpu;
	UINT8       m_sound_nmi_mask;
	UINT8       m_sound_pa_latch;
	DECLARE_WRITE16_MEMBER(tnextspc_coin_counters_w);
	DECLARE_WRITE16_MEMBER(tnextspc_unknown_w);
	DECLARE_WRITE16_MEMBER(alpha_microcontroller_w);
	DECLARE_READ16_MEMBER(kyros_dip_r);
	DECLARE_READ16_MEMBER(control_1_r);
	DECLARE_READ16_MEMBER(control_2_r);
	DECLARE_READ16_MEMBER(control_2_V_r);
	DECLARE_READ16_MEMBER(control_3_r);
	DECLARE_READ16_MEMBER(control_4_r);
	DECLARE_READ16_MEMBER(jongbou_inputs_r);
	DECLARE_WRITE16_MEMBER(kyros_sound_w);
	DECLARE_WRITE16_MEMBER(alpha68k_II_sound_w);
	DECLARE_WRITE16_MEMBER(alpha68k_V_sound_w);
	DECLARE_WRITE16_MEMBER(paddlema_soundlatch_w);
	DECLARE_WRITE16_MEMBER(tnextspc_soundlatch_w);
	DECLARE_READ16_MEMBER(kyros_alpha_trigger_r);
	DECLARE_READ16_MEMBER(alpha_II_trigger_r);
	DECLARE_READ16_MEMBER(alpha_V_trigger_r);
	DECLARE_READ16_MEMBER(sound_cpu_r);
	DECLARE_WRITE8_MEMBER(sound_bank_w);
	DECLARE_WRITE8_MEMBER(porta_w);
	DECLARE_WRITE16_MEMBER(alpha68k_videoram_w);
	DECLARE_WRITE16_MEMBER(alpha68k_II_video_bank_w);
	DECLARE_WRITE16_MEMBER(alpha68k_V_video_control_w);
	DECLARE_DRIVER_INIT(paddlema);
	DECLARE_DRIVER_INIT(btlfield);
	DECLARE_DRIVER_INIT(jongbou);
	DECLARE_DRIVER_INIT(goldmedl);
	DECLARE_DRIVER_INIT(skyadvnt);
	DECLARE_DRIVER_INIT(goldmedla);
	DECLARE_DRIVER_INIT(gangwarsu);
	DECLARE_DRIVER_INIT(gangwars);
	DECLARE_DRIVER_INIT(tnextspc);
	DECLARE_DRIVER_INIT(timesold1);
	DECLARE_DRIVER_INIT(sbasebal);
	DECLARE_DRIVER_INIT(skysoldr);
	DECLARE_DRIVER_INIT(skyadvntu);
	DECLARE_DRIVER_INIT(btlfieldb);
	DECLARE_DRIVER_INIT(timesold);
	DECLARE_DRIVER_INIT(kyros);
	DECLARE_DRIVER_INIT(sstingry);
	TILE_GET_INFO_MEMBER(get_tile_info);
	DECLARE_MACHINE_START(common);
	DECLARE_MACHINE_RESET(common);
	DECLARE_PALETTE_INIT(kyros);
	DECLARE_PALETTE_INIT(paddlem);
	DECLARE_MACHINE_START(alpha68k_II);
	DECLARE_MACHINE_RESET(alpha68k_II);
	DECLARE_VIDEO_START(alpha68k);
	DECLARE_MACHINE_START(alpha68k_V);
	DECLARE_MACHINE_RESET(alpha68k_V);
	UINT32 screen_update_sstingry(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	UINT32 screen_update_kyros(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	UINT32 screen_update_alpha68k_I(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	UINT32 screen_update_alpha68k_II(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	UINT32 screen_update_alpha68k_V(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	UINT32 screen_update_alpha68k_V_sb(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	INTERRUPT_GEN_MEMBER(alpha68k_sound_nmi);
	void alpha68k_flipscreen_w( int flip );
	void alpha68k_V_video_bank_w( int bank );
	void draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect, int j, int s, int e );
	void draw_sprites_V( bitmap_ind16 &bitmap, const rectangle &cliprect, int j, int s, int e, int fx_mask, int fy_mask, int sprite_mask );
	void draw_sprites_I( bitmap_ind16 &bitmap, const rectangle &cliprect, int c, int d, int yshift );
	void kyros_video_banking(int *bank, int data);
	void jongbou_video_banking(int *bank, int data);
	void kyros_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect, int c, int d );
	void sstingry_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect, int c, int d );
	required_device<cpu_device> m_maincpu;
	required_device<gfxdecode_device> m_gfxdecode;
	required_device<palette_device> m_palette;
};

/* game_id - used to deal with a few game specific situations */
enum
{
	ALPHA68K_BTLFIELDB = 1,     // used in alpha_II_trigger_r
	ALPHA68K_JONGBOU,           // used in kyros_alpha_trigger_r & kyros_draw_sprites
	ALPHA68K_KYROS          // used in kyros_draw_sprites
};
