text: /***************************************************************************
  
  Shanghai 3           (c)1993 Sunsoft     (68000     AY8910 OKI6295)
  Hebereke no Popoon   (c)1994 Sunsoft     (68000 Z80 YM3438 OKI6295)
  Blocken              (c)1994 KID / Visco (68000 Z80 YM3438 OKI6295)
  
  These games use the custom blitter GA9201 KA01-0249 (120pin IC)
  
  driver by Nicola Salmoria
  
  TODO:
  shangha3:
  - The zoom used for the "100" floating score when you remove tiles is very
    rough.
  heberpop:
  - Unknown writes to sound ports 40/41
  blocken:
  - incomplete zoom support, and missing rotation support.
  
  ***************************************************************************/
  
  #include "driver.h"
  #include "cpu/z80/z80.h"
  
  
  extern data16_t *shangha3_ram;
  extern size_t shangha3_ram_size;
  extern int shangha3_do_shadows;
  
  WRITE16_HANDLER( shangha3_flipscreen_w );
  WRITE16_HANDLER( shangha3_gfxlist_addr_w );
  WRITE16_HANDLER( shangha3_blitter_go_w );
  VIDEO_START( shangha3 );
  VIDEO_UPDATE( shangha3 );
  
  
  
  /* this looks like a simple protection check */
  /*
  write    read
  78 78 -> 0
  9b 10 -> 1
  9b 20 -> 3
  9b 40 -> 7
  9b 80 -> f
  08    -> e
  10    -> c
  20    -> 8
  40    -> 0
  */
  static READ16_HANDLER( shangha3_prot_r )
  {
  	static int count;
  	static int result[] = { 0x0,0x1,0x3,0x7,0xf,0xe,0xc,0x8,0x0};
  
  log_cb(RETRO_LOG_DEBUG, LOGPRE "PC %04x: read 20004e\n",activecpu_get_pc());
  
  	return result[count++ % 9];
  }
  static WRITE16_HANDLER( shangha3_prot_w )
  {
  log_cb(RETRO_LOG_DEBUG, LOGPRE "PC %04x: write %02x to 20004e\n",activecpu_get_pc(),data);
  }
  
  
  static READ16_HANDLER( heberpop_gfxrom_r )
  {
  	UINT8 *ROM = memory_region(REGION_GFX1);
  
  	return ROM[2*offset] | (ROM[2*offset+1] << 8);
  }
  
  
  
  static WRITE16_HANDLER( shangha3_coinctrl_w )
  {
  	if (ACCESSING_MSB)
  	{
  		coin_lockout_w(0,~data & 0x0400);
  		coin_lockout_w(1,~data & 0x0400);
  		coin_counter_w(0,data & 0x0100);
  		coin_counter_w(1,data & 0x0200);
  	}
  }
  
  static WRITE16_HANDLER( heberpop_coinctrl_w )
  {
  	if (ACCESSING_LSB)
  	{
  		/* the sound ROM bank is selected by the main CPU! */
  		OKIM6295_set_bank_base(0,(data & 0x08) ? 0x40000 : 0x00000);
  
  		coin_lockout_w(0,~data & 0x04);
  		coin_lockout_w(1,~data & 0x04);
  		coin_counter_w(0,data & 0x01);
  		coin_counter_w(1,data & 0x02);
  	}
  }
  
  
  static WRITE16_HANDLER( heberpop_sound_command_w )
  {
  	if (ACCESSING_LSB)
  	{
  		soundlatch_w(0,data & 0xff);
  		cpu_set_irq_line_and_vector(1,0,HOLD_LINE,0xff);	/* RST 38h */
  	}
  }
  
  
  
  static MEMORY_READ16_START( shangha3_readmem )
  	{ 0x000000, 0x07ffff, MRA16_ROM },
  	{ 0x100000, 0x100fff, MRA16_RAM },
  	{ 0x200000, 0x200001, input_port_0_word_r },
  	{ 0x200002, 0x200003, input_port_1_word_r },
  	{ 0x20001e, 0x20001f, AY8910_read_port_0_lsb_r },
  	{ 0x20004e, 0x20004f, shangha3_prot_r },
  	{ 0x20006e, 0x20006f, OKIM6295_status_0_lsb_r },
  	{ 0x300000, 0x30ffff, MRA16_RAM },
  MEMORY_END
  
  static MEMORY_WRITE16_START( shangha3_writemem )
  	{ 0x000000, 0x07ffff, MWA16_ROM },
  	{ 0x100000, 0x100fff, paletteram16_RRRRRGGGGGBBBBBx_word_w, &paletteram16 },
  	{ 0x200008, 0x200009, shangha3_blitter_go_w },
  	{ 0x20000a, 0x20000b, MWA16_NOP },	/* irq ack? */
  	{ 0x20000c, 0x20000d, shangha3_coinctrl_w },
  	{ 0x20002e, 0x20002f, AY8910_write_port_0_lsb_w },
  	{ 0x20003e, 0x20003f, AY8910_control_port_0_lsb_w },
  	{ 0x20004e, 0x20004f, shangha3_prot_w },
  	{ 0x20006e, 0x20006f, OKIM6295_data_0_lsb_w },
  	{ 0x300000, 0x30ffff, MWA16_RAM, &shangha3_ram, &shangha3_ram_size },	/* gfx & work ram */
  	{ 0x340000, 0x340001, shangha3_flipscreen_w },
  	{ 0x360000, 0x360001, shangha3_gfxlist_addr_w },
  MEMORY_END
  
  
  static MEMORY_READ16_START( heberpop_readmem )
  	{ 0x000000, 0x0fffff, MRA16_ROM },
  	{ 0x100000, 0x100fff, MRA16_RAM },
  	{ 0x200000, 0x200001, input_port_0_word_r },
  	{ 0x200002, 0x200003, input_port_1_word_r },
  	{ 0x200004, 0x200005, input_port_2_word_r },
  	{ 0x300000, 0x30ffff, MRA16_RAM },
  	{ 0x800000, 0xb7ffff, heberpop_gfxrom_r },
  MEMORY_END
  
  static MEMORY_WRITE16_START( heberpop_writemem )
  	{ 0x000000, 0x0fffff, MWA16_ROM },
  	{ 0x100000, 0x100fff, paletteram16_RRRRRGGGGGBBBBBx_word_w, &paletteram16 },
  	{ 0x200008, 0x200009, shangha3_blitter_go_w },
  	{ 0x20000a, 0x20000b, MWA16_NOP },	/* irq ack? */
  	{ 0x20000c, 0x20000d, heberpop_coinctrl_w },
  	{ 0x20000e, 0x20000f, heberpop_sound_command_w },
  	{ 0x300000, 0x30ffff, MWA16_RAM, &shangha3_ram, &shangha3_ram_size },	/* gfx & work ram */
  	{ 0x340000, 0x340001, shangha3_flipscreen_w },
  	{ 0x360000, 0x360001, shangha3_gfxlist_addr_w },
  MEMORY_END
  
  static MEMORY_READ16_START( blocken_readmem )
  	{ 0x000000, 0x0fffff, MRA16_ROM },
  	{ 0x100000, 0x100001, input_port_0_word_r },
  	{ 0x100002, 0x100003, input_port_1_word_r },
  	{ 0x100004, 0x100005, input_port_2_word_r },
  	{ 0x200000, 0x200fff, MRA16_RAM },
  	{ 0x300000, 0x30ffff, MRA16_RAM },
  	{ 0x800000, 0xb7ffff, heberpop_gfxrom_r },
  MEMORY_END
  
  static MEMORY_WRITE16_START( blocken_writemem )
  	{ 0x000000, 0x0fffff, MWA16_ROM },
  	{ 0x100008, 0x100009, shangha3_blitter_go_w },
  	{ 0x10000a, 0x10000b, MWA16_NOP },	/* irq ack? */
  	{ 0x10000c, 0x10000d, heberpop_coinctrl_w },
  	{ 0x10000e, 0x10000f, heberpop_sound_command_w },
  	{ 0x200000, 0x200fff, paletteram16_RRRRRGGGGGBBBBBx_word_w, &paletteram16 },
  	{ 0x300000, 0x30ffff, MWA16_RAM, &shangha3_ram, &shangha3_ram_size },	/* gfx & work ram */
  	{ 0x340000, 0x340001, shangha3_flipscreen_w },
  	{ 0x360000, 0x360001, shangha3_gfxlist_addr_w },
  MEMORY_END
  
  
  static MEMORY_READ_START( heberpop_sound_readmem )
  	{ 0x0000, 0xf7ff, MRA_ROM },
  	{ 0xf800, 0xffff, MRA_RAM },
  MEMORY_END
  
  static MEMORY_WRITE_START( heberpop_sound_writemem )
  	{ 0x0000, 0xf7ff, MWA_ROM },
  	{ 0xf800, 0xffff, MWA_RAM },
  MEMORY_END
  
  static PORT_READ_START( heberpop_sound_readport )
  	{ 0x00, 0x00, YM2612_status_port_0_A_r },
  	{ 0x80, 0x80, OKIM6295_status_0_r },
  	{ 0xc0, 0xc0, soundlatch_r },
  PORT_END
  
  static PORT_WRITE_START( heberpop_sound_writeport )
  	{ 0x00, 0x00, YM2612_control_port_0_A_w },
  	{ 0x01, 0x01, YM2612_data_port_0_A_w },
  	{ 0x02, 0x02, YM2612_control_port_0_B_w },
  	{ 0x03, 0x03, YM2612_data_port_0_B_w },
  	{ 0x80, 0x80, OKIM6295_data_0_w },
  PORT_END
  
  
  
  INPUT_PORTS_START( shangha3 )
  	PORT_START
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
  	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
  	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
  	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNKNOWN )
  
  	PORT_START
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_COIN2 )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_SERVICE1 )
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_START2 )
  	PORT_BITX(0x0020, IP_ACTIVE_LOW, IPT_SERVICE, DEF_STR( Service_Mode ), KEYCODE_F2, IP_JOY_NONE )
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_VBLANK )
  
  	PORT_START
  	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) )
  	PORT_DIPSETTING(    0x01, "Easy" )
  	PORT_DIPSETTING(    0x03, "Normal" )
  	PORT_DIPSETTING(    0x02, "Hard" )
  	PORT_DIPSETTING(    0x00, "Hardest" )
  	PORT_DIPNAME( 0x0c, 0x0c, "Base Time" )
  	PORT_DIPSETTING(    0x04, "70 sec" )
  	PORT_DIPSETTING(    0x0c, "80 sec" )
  	PORT_DIPSETTING(    0x08, "90 sec" )
  	PORT_DIPSETTING(    0x00, "100 sec" )
  	PORT_DIPNAME( 0x30, 0x30, "Additional Time" )
  	PORT_DIPSETTING(    0x10, "4 sec" )
  	PORT_DIPSETTING(    0x30, "5 sec" )
  	PORT_DIPSETTING(    0x20, "6 sec" )
  	PORT_DIPSETTING(    0x00, "7 sec" )
  	PORT_DIPNAME( 0x40, 0x00, DEF_STR( Demo_Sounds ) )
  	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
  	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Flip_Screen ) )
  	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
  
  	PORT_START
  	PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_A ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
  	PORT_DIPSETTING(    0x04, DEF_STR( 4C_1C ) )
  	PORT_DIPSETTING(    0x02, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(    0x06, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(    0x07, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(    0x03, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(    0x05, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(    0x01, DEF_STR( 1C_4C ) )
  	PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_B ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
  	PORT_DIPSETTING(    0x20, DEF_STR( 4C_1C ) )
  	PORT_DIPSETTING(    0x10, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(    0x30, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(    0x38, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(    0x18, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(    0x28, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(    0x08, DEF_STR( 1C_4C ) )
  	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
  	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
  INPUT_PORTS_END
  
  INPUT_PORTS_START( heberpop )
  	PORT_START
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
  	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_VBLANK )	/* vblank?? has to toggle */
  	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
  	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
  	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_VBLANK )	/* vblank?? has to toggle */
  
  	PORT_START
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_COIN2 )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_SERVICE1 )
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_START2 )
  	PORT_BITX(0x0020, IP_ACTIVE_LOW, IPT_SERVICE, DEF_STR( Service_Mode ), KEYCODE_F2, IP_JOY_NONE )
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_UNKNOWN )
  
  	PORT_START
  	PORT_DIPNAME( 0x0003, 0x0003, DEF_STR( Difficulty ) )
  	PORT_DIPSETTING(      0x0002, "Very Easy" )
  	PORT_DIPSETTING(      0x0001, "Easy" )
  	PORT_DIPSETTING(      0x0003, "Normal" )
  	PORT_DIPSETTING(      0x0000, "Hard" )
  	PORT_DIPNAME( 0x0004, 0x0004, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0004, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0008, 0x0008, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0008, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0010, 0x0010, "Allow Diagonal Moves" )
  	PORT_DIPSETTING(      0x0000, DEF_STR( No ) )
  	PORT_DIPSETTING(      0x0010, DEF_STR( Yes ) )
  	PORT_DIPNAME( 0x0020, 0x0020, DEF_STR( Demo_Sounds ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0020, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0040, 0x0040, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0040, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0080, 0x0080, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0080, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0700, 0x0700, DEF_STR( Coin_A ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( 5C_1C ) )
  	PORT_DIPSETTING(      0x0400, DEF_STR( 4C_1C ) )
  	PORT_DIPSETTING(      0x0200, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(      0x0600, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(      0x0700, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(      0x0300, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(      0x0500, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(      0x0100, DEF_STR( 1C_4C ) )
  	PORT_DIPNAME( 0x3800, 0x3800, DEF_STR( Coin_B ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( 5C_1C ) )
  	PORT_DIPSETTING(      0x2000, DEF_STR( 4C_1C ) )
  	PORT_DIPSETTING(      0x1000, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(      0x3000, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(      0x3800, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(      0x1800, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(      0x2800, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(      0x0800, DEF_STR( 1C_4C ) )
  	PORT_DIPNAME( 0x4000, 0x4000, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x4000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x8000, 0x8000, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x8000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  INPUT_PORTS_END
  
  INPUT_PORTS_START( blocken )
  	PORT_START
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER1 )
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
  	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER1 )
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_VBLANK )	/* vblank?? has to toggle */
  	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER2 )
  	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
  	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
  	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER2 )
  	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_VBLANK )	/* vblank?? has to toggle */
  
  	PORT_START
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_COIN2 )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_SERVICE1 )
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_START2 )
  	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_SERVICE )	/* keeping this pressed on boot generates "BAD DIPSW" */
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_UNKNOWN )
  
  	PORT_START
  	PORT_SERVICE( 0x0001, IP_ACTIVE_LOW )
  	PORT_DIPNAME( 0x0006, 0x0006, DEF_STR( Difficulty ) )
  	PORT_DIPSETTING(      0x0004, "Easy" )
  	PORT_DIPSETTING(      0x0006, "Normal" )
  	PORT_DIPSETTING(      0x0002, "Hard" )
  	PORT_DIPSETTING(      0x0000, "Very Hard" )
  	PORT_DIPNAME( 0x0008, 0x0008, "Game Type" )
  	PORT_DIPSETTING(      0x0008, "A" )
  	PORT_DIPSETTING(      0x0000, "B" )
  	PORT_DIPNAME( 0x0030, 0x0030, "Players" )
  	PORT_DIPSETTING(      0x0030, "1" )
  	PORT_DIPSETTING(      0x0020, "2" )
  	PORT_DIPSETTING(      0x0010, "3" )
  	PORT_DIPSETTING(      0x0000, "4" )
  	PORT_DIPNAME( 0x0040, 0x0000, DEF_STR( Demo_Sounds ) )
  	PORT_DIPSETTING(      0x0040, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0080, 0x0080, DEF_STR( Flip_Screen ) )
  	PORT_DIPSETTING(      0x0080, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0f00, 0x0f00, DEF_STR( Coin_A ) )
  	PORT_DIPSETTING(      0x0200, DEF_STR( 4C_1C ) )
  	PORT_DIPSETTING(      0x0500, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(      0x0800, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(      0x0400, DEF_STR( 3C_2C ) )
  	PORT_DIPSETTING(      0x0100, DEF_STR( 4C_3C ) )
  	PORT_DIPSETTING(      0x0f00, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(      0x0300, DEF_STR( 3C_4C ) )
  	PORT_DIPSETTING(      0x0700, DEF_STR( 2C_3C ) )
  	PORT_DIPSETTING(      0x0e00, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(      0x0600, DEF_STR( 2C_5C ) )
  	PORT_DIPSETTING(      0x0d00, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(      0x0c00, DEF_STR( 1C_4C ) )
  	PORT_DIPSETTING(      0x0b00, DEF_STR( 1C_5C ) )
  	PORT_DIPSETTING(      0x0a00, DEF_STR( 1C_6C ) )
  	PORT_DIPSETTING(      0x0900, DEF_STR( 1C_7C ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( Free_Play ) )
  	PORT_DIPNAME( 0xf000, 0xf000, DEF_STR( Coin_B ) )
  	PORT_DIPSETTING(      0x2000, DEF_STR( 4C_1C ) )
  	PORT_DIPSETTING(      0x5000, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(      0x8000, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( 5C_3C ) )
  	PORT_DIPSETTING(      0x4000, DEF_STR( 3C_2C ) )
  	PORT_DIPSETTING(      0x1000, DEF_STR( 4C_3C ) )
  	PORT_DIPSETTING(      0xf000, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(      0x3000, DEF_STR( 3C_4C ) )
  	PORT_DIPSETTING(      0x7000, DEF_STR( 2C_3C ) )
  	PORT_DIPSETTING(      0xe000, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(      0x6000, DEF_STR( 2C_5C ) )
  	PORT_DIPSETTING(      0xd000, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(      0xc000, DEF_STR( 1C_4C ) )
  	PORT_DIPSETTING(      0xb000, DEF_STR( 1C_5C ) )
  	PORT_DIPSETTING(      0xa000, DEF_STR( 1C_6C ) )
  	PORT_DIPSETTING(      0x9000, DEF_STR( 1C_7C ) )
  INPUT_PORTS_END
  
  
  
  static struct GfxLayout charlayout =
  {
  	16,16,
  	RGN_FRAC(1,1),
  	4,
  	{ 0, 1, 2, 3 },
  	{ 1*4, 0*4, 3*4, 2*4, 5*4, 4*4, 7*4, 6*4,
  			9*4, 8*4, 11*4, 10*4, 13*4, 12*4, 15*4, 14*4 },
  	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64,
  			8*64, 9*64, 10*64, 11*64, 12*64, 13*64, 14*64, 15*64 },
  	128*8
  };
  
  static struct GfxDecodeInfo gfxdecodeinfo[] =
  {
  	{ REGION_GFX1, 0, &charlayout, 0, 128 },
  	{ -1 } /* end of array */
  };
  
  
  
  static struct AY8910interface ay8910_interface =
  {
  	1,			/* 1 chip */
  	1500000,	/* 1.5 MHz */
  	{ 30 },
  	{ input_port_3_r },
  	{ input_port_2_r },
  	{ 0 },
  	{ 0 }
  };
  
  static void irqhandler(int linestate)
  {
  	cpu_set_nmi_line(1,linestate);
  }
  
  static struct YM2612interface ym3438_interface =
  {
  	1,			/* 1 chip */
  	8000000,	/* 8 MHz ?? */
  	{ YM3012_VOL(40,MIXER_PAN_CENTER,40,MIXER_PAN_CENTER) },	/* Volume */
  	{ 0 },
  	{ 0 },
  	{ 0 },
  	{ 0 },
  	{ irqhandler }
  };
  
  static struct OKIM6295interface okim6295_interface =
  {
  	1,                  /* 1 chip */
  	{ 8000 },           /* 8000Hz frequency ??? */
  	{ REGION_SOUND1 },	/* memory region */
  	{ 100 }
  };
  
  
  
  static MACHINE_DRIVER_START( shangha3 )
  
  	/* basic machine hardware */
  	MDRV_CPU_ADD(M68000, 16000000)	/* 16 MHz ??? */
  	MDRV_CPU_MEMORY(shangha3_readmem,shangha3_writemem)
  	MDRV_CPU_VBLANK_INT(irq4_line_hold,1)
  
  	MDRV_FRAMES_PER_SECOND(60)
  	MDRV_VBLANK_DURATION(DEFAULT_REAL_60HZ_VBLANK_DURATION)
  
  	/* video hardware */
  	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_HAS_SHADOWS )
  	MDRV_SCREEN_SIZE(24*16, 16*16)
  	MDRV_VISIBLE_AREA(0*16, 24*16-1, 1*16, 15*16-1)
  	MDRV_GFXDECODE(gfxdecodeinfo)
  	MDRV_PALETTE_LENGTH(2048)
  
  	MDRV_VIDEO_START(shangha3)
  	MDRV_VIDEO_UPDATE(shangha3)
  
  	/* sound hardware */
  	MDRV_SOUND_ADD(AY8910, ay8910_interface)
  	MDRV_SOUND_ADD(OKIM6295, okim6295_interface)
  MACHINE_DRIVER_END
  
  
  static MACHINE_DRIVER_START( heberpop )
  
  	/* basic machine hardware */
  	MDRV_CPU_ADD(M68000, 16000000)	/* 16 MHz ??? */
  	MDRV_CPU_MEMORY(heberpop_readmem,heberpop_writemem)
  	MDRV_CPU_VBLANK_INT(irq4_line_hold,1)
  
  	MDRV_CPU_ADD(Z80, 6000000)	/* 6 MHz ??? */
  	MDRV_CPU_MEMORY(heberpop_sound_readmem,heberpop_sound_writemem)
  	MDRV_CPU_PORTS(heberpop_sound_readport,heberpop_sound_writeport)
  								/* NMI triggered by YM3438 */
  	MDRV_FRAMES_PER_SECOND(60)
  	MDRV_VBLANK_DURATION(DEFAULT_REAL_60HZ_VBLANK_DURATION)
  
  	/* video hardware */
  	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_HAS_SHADOWS )
  	MDRV_SCREEN_SIZE(24*16, 16*16)
  	MDRV_VISIBLE_AREA(0*16, 24*16-1, 1*16, 15*16-1)
  	MDRV_GFXDECODE(gfxdecodeinfo)
  	MDRV_PALETTE_LENGTH(2048)
  
  	MDRV_VIDEO_START(shangha3)
  	MDRV_VIDEO_UPDATE(shangha3)
  
  	/* sound hardware */
  	MDRV_SOUND_ADD(YM3438, ym3438_interface)
  	MDRV_SOUND_ADD(OKIM6295, okim6295_interface)
  MACHINE_DRIVER_END
  
  
  static MACHINE_DRIVER_START( blocken )
  
  	/* basic machine hardware */
  	MDRV_CPU_ADD(M68000, 16000000)	/* 16 MHz ??? */
  	MDRV_CPU_MEMORY(blocken_readmem,blocken_writemem)
  	MDRV_CPU_VBLANK_INT(irq4_line_hold,1)
  
  	MDRV_CPU_ADD(Z80, 6000000)	/* 6 MHz ??? */
  	MDRV_CPU_MEMORY(heberpop_sound_readmem,heberpop_sound_writemem)
  	MDRV_CPU_PORTS(heberpop_sound_readport,heberpop_sound_writeport)
  								/* NMI triggered by YM3438 */
  	MDRV_FRAMES_PER_SECOND(60)
  	MDRV_VBLANK_DURATION(DEFAULT_REAL_60HZ_VBLANK_DURATION)
  
  	/* video hardware */
  	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_HAS_SHADOWS)
  	MDRV_SCREEN_SIZE(24*16, 16*16)
  	MDRV_VISIBLE_AREA(0*16, 24*16-1, 1*16, 15*16-1)
  	MDRV_GFXDECODE(gfxdecodeinfo)
  	MDRV_PALETTE_LENGTH(2048)
  
  	MDRV_VIDEO_START(shangha3)
  	MDRV_VIDEO_UPDATE(shangha3)
  
  	/* sound hardware */
  	MDRV_SOUND_ADD(YM3438, ym3438_interface)
  	MDRV_SOUND_ADD(OKIM6295, okim6295_interface)
  MACHINE_DRIVER_END
  
  
  
  /***************************************************************************
  
    Game driver(s)
  
  ***************************************************************************/
  
  ROM_START( shangha3 )
  	ROM_REGION( 0x80000, REGION_CPU1, 0 )
  	ROM_LOAD16_BYTE( "s3j_ic3.v11",  0x0000, 0x40000, CRC(e98ce9c8) SHA1(359e117aebb644d7b235add7e71ed6891243d451) )
  	ROM_LOAD16_BYTE( "s3j_ic2.v11",  0x0001, 0x40000, CRC(09174620) SHA1(1d1639c07895f715facfe153fbdb6ae0f3cdd876) )
  
  	ROM_REGION( 0x200000, REGION_GFX1, ROMREGION_DISPOSE )
  	ROM_LOAD( "s3j_ic43.chr", 0x0000, 0x200000, CRC(2dbf9d17) SHA1(dd94ddc4bb02ab544aa3f89b614afc46678cc48d) )
  
  	ROM_REGION( 0x40000, REGION_SOUND1, 0 )	/* samples for M6295 */
  	ROM_LOAD( "s3j_ic75.v10", 0x0000, 0x40000, CRC(f0cdc86a) SHA1(b1017a9841a56e0f5d2714f550f64ed1f4e238e6) )
  ROM_END
  
  ROM_START( heberpop )
  	ROM_REGION( 0x100000, REGION_CPU1, 0 )
  	ROM_LOAD16_BYTE( "hbpic31.bin",  0x0000, 0x80000, CRC(c430d264) SHA1(4be12b1fa90da09047db3a31171ffda8ab8bd851) )
  	ROM_LOAD16_BYTE( "hbpic32.bin",  0x0001, 0x80000, CRC(bfa555a8) SHA1(754f581554022b98ba8e78ee96f846faa2cedc69) )
  
  	ROM_REGION( 0x10000, REGION_CPU2, 0 )
  	ROM_LOAD( "hbpic34.bin",  0x0000, 0x10000, CRC(0cf056c6) SHA1(9992cd3879d9a57fcb784fc1e11d6b6d87e5a366) )
  
  	ROM_REGION( 0x380000, REGION_GFX1, 0 )	/* don't dispose, read during tests */
  	ROM_LOAD( "hbpic98.bin",  0x000000, 0x80000, CRC(a599100a) SHA1(f2e517256a42b3fa4a047bbe742d714f568cc117) )
  	ROM_LOAD( "hbpic99.bin",  0x080000, 0x80000, CRC(fb8bb12f) SHA1(78c1fec1371d312e113d92803dd59acc36604989) )
  	ROM_LOAD( "hbpic100.bin", 0x100000, 0x80000, CRC(05a0f765) SHA1(4f44cf367c3697eb6c245297c9d05160d7d94e24) )
  	ROM_LOAD( "hbpic101.bin", 0x180000, 0x80000, CRC(151ba025) SHA1(b6ebe60872957a2625e666d53a5a4bc941a1f21c) )
  	ROM_LOAD( "hbpic102.bin", 0x200000, 0x80000, CRC(2b5e341a) SHA1(c7ad2dafb3433296c117978434e1699290267891) )
  	ROM_LOAD( "hbpic103.bin", 0x280000, 0x80000, CRC(efa0e745) SHA1(fc1d52d35b3c902d8b25403b0e13f86a04039bc4) )
  	ROM_LOAD( "hbpic104.bin", 0x300000, 0x80000, CRC(bb896bbb) SHA1(4311876628beb82cbacdab4d055c3738e74241b0) )
  
  	ROM_REGION( 0x80000, REGION_SOUND1, 0 )	/* samples for M6295 */
  	ROM_LOAD( "hbpic53.bin",  0x0000, 0x80000, CRC(a4483aa0) SHA1(be301d8ac6d69f5c3fdbcb85bd557090e46da1ff) )
  ROM_END
  
  ROM_START( blocken )
  	ROM_REGION( 0x100000, REGION_CPU1, 0 )
  	ROM_LOAD16_BYTE( "ic31j.bin",    0x0000, 0x20000, CRC(ec8de2a3) SHA1(09a6b8c1b656b17ab3d1fc057902487e4f94cf02) )
  	ROM_LOAD16_BYTE( "ic32j.bin",    0x0001, 0x20000, CRC(79b96240) SHA1(c1246bd4b91fa45c581a8fdf90cc6beb85adf8ec) )
  
  	ROM_REGION( 0x10000, REGION_CPU2, 0 )
  	ROM_LOAD( "ic34.bin",     0x0000, 0x10000, CRC(23e446ff) SHA1(82c03b45b337696b0f8293c446544d7ee080d415) )
  
  	ROM_REGION( 0x380000, REGION_GFX1, 0 )	/* don't dispose, read during tests */
  	ROM_LOAD( "ic98j.bin",    0x000000, 0x80000, CRC(35dda273) SHA1(95850d12ca1557c14bc471ddf925aaf423313ff0) )
  	ROM_LOAD( "ic99j.bin",    0x080000, 0x80000, CRC(ce43762b) SHA1(e1c51ea0b54b5febdee127619e15f1cda650cb4c) )
  	/* 100000-1fffff empty */
  	ROM_LOAD( "ic100j.bin",   0x200000, 0x80000, CRC(a34786fd) SHA1(7d4879cbaa055c2ddbe6d20dd946bf0e3e069d4d) )
  	/* 280000-37ffff empty */
  
  	ROM_REGION( 0x80000, REGION_SOUND1, 0 )	/* samples for M6295 */
  	ROM_LOAD( "ic53.bin",     0x0000, 0x80000, CRC(86108c56) SHA1(aa405fa2eec5cc178ef6226f229a12dac09504f0) )
  ROM_END
  
  
  
  static DRIVER_INIT( shangha3 )
  {
  	shangha3_do_shadows = 1;
  }
  static DRIVER_INIT( heberpop )
  {
  	shangha3_do_shadows = 0;
  }
  
  GAME( 1993, shangha3, 0, shangha3, shangha3, shangha3, ROT0, "Sunsoft", "Shanghai III (Japan)" )
  GAME( 1994, heberpop, 0, heberpop, heberpop, heberpop, ROT0, "Sunsoft / Atlus", "Hebereke no Popoon (Japan)" )
  GAME( 1994, blocken,  0, blocken,  blocken,  heberpop, ROT0, "KID / Visco", "Blocken (Japan)" )
  