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

  Thunder Zone       (c) 1991 Data East Corporation (World 2 players)
  Desert Assault     (c) 1991 Data East Corporation (USA 4 players)
  Desert Assault     (c) 1991 Data East Corporation (USA 2 players)

  I'm not sure if one of the alpha blending effects is correct (mode 0x8000,
  the usual mode 0x4000 should be correct).  It may be some kind of orthogonal
  priority effect where it should cut a hole in other higher priority sprites
  to reveal a non-alpha'd hole, or alpha against a further back tilemap.

  Emulation by Bryan McPhail, mish@tendril.co.uk


Stephh's notes (based on the games M68000 code and some tests) :

0) all games

  - If the "Flip Screen" Dip Switch is correct, screen flipping is handled by
    a write to 0x220000.w (dassault_control_1[0]) which isn't supported yet.
  - I can't confirm the "Demo Sounds" Dip Switch, but the routine is the same
    in all games (but different addresses) and it writes something to 0x180000.w
    (see 'WRITE16_HANDLER( dassault_sound_w )').


1) 'thndzone'

  - "Max Players" Dip Switch set to "2" :

      * COIN1    : adds coin(s)/credit(s) depending on "Coin A" Dip Switch
      * COIN2    : adds coin(s)/credit(s) depending on "Coin B" Dip Switch
      * COIN3    : adds coin(s)/credit(s) depending on "Coin A" Dip Switch
      * COIN4    : adds coin(s)/credit(s) depending on "Coin A" Dip Switch
      * SERVICE1 : adds 4 coins/credits

      * START1   : starts a game for player 1
      * START2   : starts a game for player 2

      * BUTTON1n : "fire"
      * BUTTON2n : "nuke"

  - "Max Players" Dip Switch set to "4" :

      * COIN1    : adds coin(s)/credit(s) depending on "Coin A" Dip Switch
      * COIN2    : adds coin(s)/credit(s) depending on "Coin B" Dip Switch
      * COIN3    : adds coin(s)/credit(s) depending on "Coin A" Dip Switch
      * COIN4    : adds coin(s)/credit(s) depending on "Coin A" Dip Switch
      * SERVICE1 : adds 4 coins/credits

      * START1   : starts a game for player 1
      * START2   : starts a game for player 2

      * BUTTON1n : "fire" + starts a game for player n
      * BUTTON2n : "nuke"


2) 'dassault'

  - "Max Players" Dip Switch set to "2" :

      * COIN1    : adds coin(s)/credit(s) depending on "Coin A" Dip Switch
      * COIN2    : adds coin(s)/credit(s) depending on "Coin B" Dip Switch
      * COIN3    : NO EFFECT !
      * COIN4    : NO EFFECT !
      * SERVICE1 : adds 1 coin/credit

      * START1   : starts a game for player 1
      * START2   : starts a game for player 2

      * BUTTON1n : "fire"
      * BUTTON2n : "nuke"

  - "Max Players" Dip Switch set to "3" :

      * COIN1    : adds coin(s)/credit(s) for player 1 depending on "Coin A" Dip Switch
      * COIN2    : adds coin(s)/credit(s) for player 2 depending on "Coin A" Dip Switch
      * COIN3    : adds coin(s)/credit(s) for player 3 depending on "Coin A" Dip Switch
      * COIN4    : adds coin(s)/credit(s) for FAKE player 4 depending on "Coin A" Dip Switch
      * SERVICE1 : adds 1 coin/credit for all players (including FAKE player 4 !)

      * START1   : NO EFFECT !
      * START2   : NO EFFECT !

      * BUTTON1n : "fire" + starts a game for player n
      * BUTTON2n : "nuke"

  - "Max Players" Dip Switch set to "4" :

      * COIN1    : adds coin(s)/credit(s) for player 1 depending on "Coin A" Dip Switch
      * COIN2    : adds coin(s)/credit(s) for player 2 depending on "Coin A" Dip Switch
      * COIN3    : adds coin(s)/credit(s) for player 3 depending on "Coin A" Dip Switch
      * COIN4    : adds coin(s)/credit(s) for player 4 depending on "Coin A" Dip Switch
      * SERVICE1 : adds 1 coin/credit for all players

      * START1   : NO EFFECT !
      * START2   : NO EFFECT !

      * BUTTON1n : "fire" + starts a game for player n
      * BUTTON2n : "nuke"


3) 'dassaul4'

  - always 4 players :

      * COIN1    : adds coin(s)/credit(s) for player 1 depending on "Coinage" Dip Switch
      * COIN2    : adds coin(s)/credit(s) for player 2 depending on "Coinage" Dip Switch
      * COIN3    : adds coin(s)/credit(s) for player 3 depending on "Coinage" Dip Switch
      * COIN4    : adds coin(s)/credit(s) for player 4 depending on "Coinage" Dip Switch
      * SERVICE1 : adds 1 coin/credit

      * NO START1 !
      * NO START2 !

      * BUTTON1n : "fire" + starts a game for player n
      * BUTTON2n : "nuke"


2008-08
Dip locations verified with US conversion kit manual.

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

#include "driver.h"
#include "cpu/m68000/m68000.h"
#include "cpu/h6280/h6280.h"
#include "deco16ic.h"
#include "sound/2203intf.h"
#include "sound/2151intf.h"
#include "sound/okim6295.h"

VIDEO_START( dassault );
VIDEO_UPDATE( dassault );

static UINT16 *dassault_ram,*shared_ram,*dassault_ram2;

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

static READ16_HANDLER( dassault_control_r )
{
	switch (offset<<1)
	{
		case 0: /* Player 1 & Player 2 joysticks & fire buttons */
			return input_port_read(space->machine, "P1_P2");

		case 2: /* Player 3 & Player 4 joysticks & fire buttons */
			return input_port_read(space->machine, "P3_P4");

		case 4: /* Dip 1 (stored at 0x3f8035) */
			return input_port_read(space->machine, "DSW1");

		case 6: /* Dip 2 (stored at 0x3f8034) */
			return input_port_read(space->machine, "DSW2");

		case 8: /* VBL, Credits */
			return input_port_read(space->machine, "SYSTEM");
	}

	return 0xffff;
}

static WRITE16_HANDLER( dassault_control_w )
{
	coin_counter_w(0,data&1);
	if (data&0xfffe)
		logerror("Coin cointrol %04x\n",data);
}

static READ16_HANDLER( dassault_sub_control_r )
{
	return input_port_read(space->machine, "VBLANK1");
}

static WRITE16_HANDLER( dassault_sound_w )
{
	soundlatch_w(space,0,data&0xff);
	cpu_set_input_line(space->machine->cpu[2],0,HOLD_LINE); /* IRQ1 */
}

/* The CPU-CPU irq controller is overlaid onto the end of the shared memory */
static READ16_HANDLER( dassault_irq_r )
{
	switch (offset) {
		case 0: cpu_set_input_line(space->machine->cpu[0], 5, CLEAR_LINE); break;
		case 1: cpu_set_input_line(space->machine->cpu[1], 6, CLEAR_LINE); break;
	}
	return shared_ram[(0xffc/2)+offset]; /* The values probably don't matter */
}

static WRITE16_HANDLER( dassault_irq_w )
{
	switch (offset) {
		case 0: cpu_set_input_line(space->machine->cpu[0], 5, ASSERT_LINE); break;
		case 1: cpu_set_input_line(space->machine->cpu[1], 6, ASSERT_LINE); break;
	}

	COMBINE_DATA(&shared_ram[(0xffc/2)+offset]); /* The values probably don't matter */
}

static WRITE16_HANDLER( shared_ram_w )
{
	COMBINE_DATA(&shared_ram[offset]);
}

static READ16_HANDLER( shared_ram_r )
{
	return shared_ram[offset];
}

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

static ADDRESS_MAP_START( dassault_readmem, ADDRESS_SPACE_PROGRAM, 16 )
	AM_RANGE(0x000000, 0x07ffff) AM_READ(SMH_ROM)
	AM_RANGE(0x100000, 0x103fff) AM_READ(SMH_RAM)
	AM_RANGE(0x1c0000, 0x1c000f) AM_READ(dassault_control_r)
	AM_RANGE(0x200000, 0x201fff) AM_READ(SMH_RAM)
	AM_RANGE(0x202000, 0x203fff) AM_READ(SMH_RAM)
	AM_RANGE(0x240000, 0x240fff) AM_READ(SMH_RAM)
	AM_RANGE(0x242000, 0x242fff) AM_READ(SMH_RAM)
	AM_RANGE(0x3f8000, 0x3fbfff) AM_READ(SMH_RAM) /* Main ram */
	AM_RANGE(0x3fc000, 0x3fcfff) AM_READ(SMH_RAM) /* Spriteram (2nd) */
	AM_RANGE(0x3feffc, 0x3fefff) AM_READ(dassault_irq_r)
	AM_RANGE(0x3fe000, 0x3fefff) AM_READ(shared_ram_r) /* Shared ram */
ADDRESS_MAP_END

static ADDRESS_MAP_START( dassault_writemem, ADDRESS_SPACE_PROGRAM, 16 )
	AM_RANGE(0x000000, 0x07ffff) AM_WRITE(SMH_ROM)
	AM_RANGE(0x100000, 0x103fff) AM_WRITE(deco16_nonbuffered_palette_w) AM_BASE(&paletteram16)
	AM_RANGE(0x140004, 0x140007) AM_WRITE(SMH_NOP) /* ? */
	AM_RANGE(0x180000, 0x180001) AM_WRITE(dassault_sound_w)
	AM_RANGE(0x1c000a, 0x1c000b) AM_WRITE(deco16_priority_w)
	AM_RANGE(0x1c000c, 0x1c000d) AM_WRITE(buffer_spriteram16_2_w)
	AM_RANGE(0x1c000e, 0x1c000f) AM_WRITE(dassault_control_w)

	AM_RANGE(0x200000, 0x201fff) AM_WRITE(deco16_pf1_data_w) AM_BASE(&deco16_pf1_data)
	AM_RANGE(0x202000, 0x203fff) AM_WRITE(deco16_pf2_data_w) AM_BASE(&deco16_pf2_data)
	AM_RANGE(0x212000, 0x212fff) AM_WRITE(SMH_RAM) AM_BASE(&deco16_pf2_rowscroll)
	AM_RANGE(0x220000, 0x22000f) AM_WRITE(SMH_RAM) AM_BASE(&deco16_pf12_control)

	AM_RANGE(0x240000, 0x240fff) AM_WRITE(deco16_pf3_data_w) AM_BASE(&deco16_pf3_data)
	AM_RANGE(0x242000, 0x242fff) AM_WRITE(deco16_pf4_data_w) AM_BASE(&deco16_pf4_data)
	AM_RANGE(0x252000, 0x252fff) AM_WRITE(SMH_RAM) AM_BASE(&deco16_pf4_rowscroll)
	AM_RANGE(0x260000, 0x26000f) AM_WRITE(SMH_RAM) AM_BASE(&deco16_pf34_control)

	AM_RANGE(0x3f8000, 0x3fbfff) AM_WRITE(SMH_RAM) AM_BASE(&dassault_ram)
	AM_RANGE(0x3fc000, 0x3fcfff) AM_WRITE(SMH_RAM) AM_BASE(&spriteram16_2) AM_SIZE(&spriteram_2_size)
	AM_RANGE(0x3feffc, 0x3fefff) AM_WRITE(dassault_irq_w)
	AM_RANGE(0x3fe000, 0x3fefff) AM_WRITE(shared_ram_w) AM_BASE(&shared_ram)
ADDRESS_MAP_END

static ADDRESS_MAP_START( dassault_sub_readmem, ADDRESS_SPACE_PROGRAM, 16 )
	AM_RANGE(0x000000, 0x07ffff) AM_READ(SMH_ROM)
	AM_RANGE(0x100004, 0x100005) AM_READ(dassault_sub_control_r)
	AM_RANGE(0x3f8000, 0x3fbfff) AM_READ(SMH_RAM) /* Sub cpu ram */
	AM_RANGE(0x3fc000, 0x3fcfff) AM_READ(SMH_RAM) /* Sprite ram */
	AM_RANGE(0x3feffc, 0x3fefff) AM_READ(dassault_irq_r)
	AM_RANGE(0x3fe000, 0x3fefff) AM_READ(shared_ram_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( dassault_sub_writemem, ADDRESS_SPACE_PROGRAM, 16 )
	AM_RANGE(0x000000, 0x07ffff) AM_WRITE(SMH_ROM)
	AM_RANGE(0x100000, 0x100001) AM_WRITE(buffer_spriteram16_w)
	AM_RANGE(0x100002, 0x100007) AM_WRITE(SMH_NOP) /* ? */
	AM_RANGE(0x3f8000, 0x3fbfff) AM_WRITE(SMH_RAM) AM_BASE(&dassault_ram2)
	AM_RANGE(0x3fc000, 0x3fcfff) AM_WRITE(SMH_RAM) AM_BASE(&spriteram16) AM_SIZE(&spriteram_size)
	AM_RANGE(0x3feffc, 0x3fefff) AM_WRITE(dassault_irq_w)
	AM_RANGE(0x3fe000, 0x3fefff) AM_WRITE(shared_ram_w)
ADDRESS_MAP_END

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

static ADDRESS_MAP_START( sound_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x000000, 0x00ffff) AM_READ(SMH_ROM)
	AM_RANGE(0x100000, 0x100001) AM_DEVREAD("ym1", ym2203_r)
	AM_RANGE(0x110000, 0x110001) AM_DEVREAD("ym2", ym2151_r)
	AM_RANGE(0x120000, 0x120001) AM_DEVREAD("oki1", okim6295_r)
	AM_RANGE(0x130000, 0x130001) AM_DEVREAD("oki2", okim6295_r)
	AM_RANGE(0x140000, 0x140001) AM_READ(soundlatch_r)
	AM_RANGE(0x1f0000, 0x1f1fff) AM_READ(SMH_BANK8)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x000000, 0x00ffff) AM_WRITE(SMH_ROM)
	AM_RANGE(0x100000, 0x100001) AM_DEVWRITE("ym1", ym2203_w)
	AM_RANGE(0x110000, 0x110001) AM_DEVWRITE("ym2", ym2151_w)
	AM_RANGE(0x120000, 0x120001) AM_DEVWRITE("oki1", okim6295_w)
	AM_RANGE(0x130000, 0x130001) AM_DEVWRITE("oki2", okim6295_w)
	AM_RANGE(0x1f0000, 0x1f1fff) AM_WRITE(SMH_BANK8)
	AM_RANGE(0x1fec00, 0x1fec01) AM_WRITE(h6280_timer_w)
	AM_RANGE(0x1ff400, 0x1ff403) AM_WRITE(h6280_irq_status_w)
ADDRESS_MAP_END

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

static INPUT_PORTS_START( common )
	PORT_START("P1_P2")
	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1) PORT_8WAY
	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1) PORT_8WAY
	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1) PORT_8WAY
	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1) PORT_8WAY
	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_START1 )

	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2) PORT_8WAY
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2) PORT_8WAY
	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2) PORT_8WAY
	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) PORT_8WAY
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_START2 )

	PORT_START("P3_P4")
	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(3) PORT_8WAY
	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(3) PORT_8WAY
	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(3) PORT_8WAY
	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(3) PORT_8WAY
	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(3)
	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(3)
	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_COIN3 )

	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(4) PORT_8WAY
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(4) PORT_8WAY
	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(4) PORT_8WAY
	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(4) PORT_8WAY
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(4)
	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(4)
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_COIN4 )

	PORT_START("VBLANK1") /* Cpu 1 vblank */
	PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_VBLANK )
INPUT_PORTS_END

static INPUT_PORTS_START( thndzone )
	PORT_INCLUDE( common )

	PORT_START("SYSTEM")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SERVICE1 )			// Adds 4 credits/coins !
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_VBLANK )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:1,2,3")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:4,5,6")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x38, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x28, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Flip_Screen ) ) PORT_DIPLOCATION("SW1:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, "2 Coins to Start, 1 to Continue" ) PORT_DIPLOCATION("SW1:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW2")
	PORT_DIPUNUSED_DIPLOC( 0x01, IP_ACTIVE_LOW, "SW2:1" )	/* OFF & Not to be changed, according to manual */
	PORT_DIPUNUSED_DIPLOC( 0x02, IP_ACTIVE_LOW, "SW2:2" )	/* OFF & Not to be changed, according to manual */
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW2:3,4")
	PORT_DIPSETTING(    0x08, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPUNUSED_DIPLOC( 0x10, IP_ACTIVE_LOW, "SW2:5" )	/* OFF & Not to be changed, according to manual */
	PORT_DIPNAME( 0x20, 0x20, "Max Players" ) PORT_DIPLOCATION("SW2:6")
	PORT_DIPSETTING(    0x20, "2" )
	PORT_DIPSETTING(    0x00, "4" )
	PORT_DIPUNUSED_DIPLOC( 0x40, IP_ACTIVE_LOW, "SW2:7" )	/* OFF & Not to be changed, according to manual */
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW2:8")	// Check code at 0x001490
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END

static INPUT_PORTS_START( dassault )
	PORT_INCLUDE( common )

	PORT_START("SYSTEM")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_VBLANK )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:1,2,3")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:4,5,6")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x38, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x28, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Flip_Screen ) ) PORT_DIPLOCATION("SW1:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, "2 Coins to Start, 1 to Continue" ) PORT_DIPLOCATION("SW1:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW2")
	PORT_DIPUNUSED_DIPLOC( 0x01, IP_ACTIVE_LOW, "SW2:1" )
	PORT_DIPUNUSED_DIPLOC( 0x02, IP_ACTIVE_LOW, "SW2:2" )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW2:3,4")
	PORT_DIPSETTING(    0x08, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x30, 0x30, "Max Players" ) PORT_DIPLOCATION("SW2:5,6")
	PORT_DIPSETTING(    0x30, "2" )
	PORT_DIPSETTING(    0x20, "3" )
	PORT_DIPSETTING(    0x10, "4" )
//  PORT_DIPSETTING(    0x00, "4 (buggy)" )
	PORT_DIPUNUSED_DIPLOC( 0x40, IP_ACTIVE_LOW, "SW2:7" )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW2:8")	// Check code at 0x0014bc
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END

static INPUT_PORTS_START( dassaul4 )
	PORT_INCLUDE( common )

	PORT_MODIFY("P1_P2")
	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("SYSTEM")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_VBLANK )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW1:1,2,3")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_6C ) )
	PORT_DIPUNUSED_DIPLOC( 0x08, IP_ACTIVE_LOW, "SW1:4" )
	PORT_DIPUNUSED_DIPLOC( 0x10, IP_ACTIVE_LOW, "SW1:5" )
	PORT_DIPUNUSED_DIPLOC( 0x20, IP_ACTIVE_LOW, "SW1:6" )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Flip_Screen ) ) PORT_DIPLOCATION("SW1:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, "2 Coins to Start, 1 to Continue" ) PORT_DIPLOCATION("SW1:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW2")
	PORT_DIPUNUSED_DIPLOC( 0x01, IP_ACTIVE_LOW, "SW2:1" )
	PORT_DIPUNUSED_DIPLOC( 0x02, IP_ACTIVE_LOW, "SW2:2" )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW2:3,4")
	PORT_DIPSETTING(    0x08, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPUNUSED_DIPLOC( 0x10, IP_ACTIVE_LOW, "SW2:5" )
	PORT_DIPUNUSED_DIPLOC( 0x20, IP_ACTIVE_LOW, "SW2:6" )
	PORT_DIPUNUSED_DIPLOC( 0x40, IP_ACTIVE_LOW, "SW2:7" )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW2:8")	// Check code at 0x0014a4
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END

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

static const gfx_layout charlayout =
{
	8,8,
	RGN_FRAC(1,2),
	4,
	{ RGN_FRAC(1,2)+8, RGN_FRAC(1,2), 8, 0 },
	{ 0, 1, 2, 3, 4, 5, 6, 7 },
	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
	16*8
};

static const gfx_layout tilelayout =
{
	16,16,
	RGN_FRAC(1,2),
	4,
	{ RGN_FRAC(1,2)+8, RGN_FRAC(1,2), 8, 0 },
	{ 32*8+0, 32*8+1, 32*8+2, 32*8+3, 32*8+4, 32*8+5, 32*8+6, 32*8+7,
		0, 1, 2, 3, 4, 5, 6, 7 },
	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16,
			8*16, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16 },
	64*8
};

static GFXDECODE_START( dassault )
	/* "gfx1" is copied to "gfx2" at runtime */
	GFXDECODE_ENTRY( "gfx2", 0, charlayout,     0,  32 )	/* Characters 8x8 */
	GFXDECODE_ENTRY( "gfx2", 0, tilelayout,     0,  32 )	/* Tiles 16x16 */
	GFXDECODE_ENTRY( "gfx3", 0, tilelayout,   512,  32 )	/* Tiles 16x16 */
	GFXDECODE_ENTRY( "gfx4", 0, tilelayout,  1024,  64 )	/* Sprites 16x16 */
	GFXDECODE_ENTRY( "gfx5", 0, tilelayout,  2048,  64 )	/* Sprites 16x16 */
GFXDECODE_END

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

static void sound_irq(const device_config *device, int state)
{
	cpu_set_input_line(device->machine->cpu[2],1,state);
}

static WRITE8_DEVICE_HANDLER( sound_bankswitch_w )
{
	/* the second OKIM6295 ROM is bank switched */
	okim6295_set_bank_base(devtag_get_device(device->machine, "oki2"), (data & 1) * 0x40000);
}

static const ym2151_interface ym2151_config =
{
	sound_irq,
	sound_bankswitch_w
};

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

static MACHINE_DRIVER_START( dassault )

	/* basic machine hardware */
	MDRV_CPU_ADD("maincpu", M68000, 14000000) /* Accurate */
	MDRV_CPU_PROGRAM_MAP(dassault_readmem,dassault_writemem)
	MDRV_CPU_VBLANK_INT("screen", irq4_line_hold)

	MDRV_CPU_ADD("sub", M68000, 14000000) /* Accurate */
	MDRV_CPU_PROGRAM_MAP(dassault_sub_readmem,dassault_sub_writemem)
	MDRV_CPU_VBLANK_INT("screen", irq5_line_hold)

	MDRV_CPU_ADD("audiocpu", H6280,32220000/8)	/* Accurate */
	MDRV_CPU_PROGRAM_MAP(sound_readmem,sound_writemem)

	MDRV_QUANTUM_TIME(HZ(8400)) /* 140 CPU slices per frame */

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_BUFFERS_SPRITERAM)

	MDRV_SCREEN_ADD("screen", RASTER)
	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(529))
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
	MDRV_SCREEN_SIZE(40*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 40*8-1, 1*8, 31*8-1)

	MDRV_GFXDECODE(dassault)
	MDRV_PALETTE_LENGTH(4096)

	MDRV_VIDEO_START(dassault)
	MDRV_VIDEO_UPDATE(dassault)

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")

	MDRV_SOUND_ADD("ym1", YM2203, 32220000/8)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.40)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.40)

	MDRV_SOUND_ADD("ym2", YM2151, 32220000/9)
	MDRV_SOUND_CONFIG(ym2151_config)
	MDRV_SOUND_ROUTE(0, "lspeaker", 0.45)
	MDRV_SOUND_ROUTE(1, "rspeaker", 0.45)

	MDRV_SOUND_ADD("oki1", OKIM6295, 1023924)
	MDRV_SOUND_CONFIG(okim6295_interface_pin7high) // clock frequency & pin 7 not verified
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.50)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.50)

	MDRV_SOUND_ADD("oki2", OKIM6295, 2047848)
	MDRV_SOUND_CONFIG(okim6295_interface_pin7high) // clock frequency & pin 7 not verified
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.25)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.25)
MACHINE_DRIVER_END

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

ROM_START( dassault )
	ROM_REGION(0x80000, "maincpu", 0 ) /* 68000 code */
	ROM_LOAD16_BYTE("01.bin", 0x00000, 0x20000, CRC(14f17ea7) SHA1(0bb8b7dba05f1ea42e68838861f0d4c263eac6b3) )
	ROM_LOAD16_BYTE("03.bin", 0x00001, 0x20000, CRC(bed1b90c) SHA1(c100f89b69025e2ff885b35a733abc627da98a07) )
	ROM_LOAD16_BYTE("gs00",   0x40000, 0x20000, CRC(b7277175) SHA1(ffb19c4dd12e0391f01de57c46a7998885fe22bf) )
	ROM_LOAD16_BYTE("gs02",   0x40001, 0x20000, CRC(cde31e35) SHA1(0219845308c9f46e73b0504bd2aefa2fa74f388e) )

	ROM_REGION(0x80000, "sub", 0 ) /* 68000 code (Sub cpu) */
	ROM_LOAD16_BYTE("hc10-1.bin", 0x00000, 0x20000, CRC(ac5ac770) SHA1(bf6640900c2f9c8091168bf106edf85350c34652) )
	ROM_LOAD16_BYTE("hc08-1.bin", 0x00001, 0x20000, CRC(864dca56) SHA1(0967f613684b539d10b67e4f6033c890e2134ea2) )
	ROM_LOAD16_BYTE("gs11",       0x40000, 0x20000, CRC(80cb23de) SHA1(d52426460eea2285c57cfc3fe37aa6dc79990e25) )
	ROM_LOAD16_BYTE("gs09",       0x40001, 0x20000, CRC(0a8fa7e1) SHA1(330ae9602b5f56b5dc4961a41991b64412a59880) )

	ROM_REGION(0x10000, "audiocpu", 0 ) /* Sound CPU */
	ROM_LOAD( "gs04",    0x00000, 0x10000, CRC(81c29ebf) SHA1(1b241277a8e35cdeaeb120970d14a09d33032459) )

	ROM_REGION(0x020000, "gfx1", ROMREGION_DISPOSE )
	ROM_LOAD16_BYTE( "gs05", 0x000000, 0x10000, CRC(0aae996a) SHA1(d37a12b057e9934212362d7eafa575c961819a27) )
	ROM_LOAD16_BYTE( "gs06", 0x000001, 0x10000, CRC(4efdf03d) SHA1(835d22829c6d0f4efc76801b449f9a779f460f1c) )

	ROM_REGION(0x120000, "gfx2", ROMREGION_DISPOSE )
	ROM_LOAD( "maj-02", 0x000000, 0x100000, CRC(383bbc37) SHA1(c537ab147a2770ce28ee185b08dd62d35249bfa9) )
	/* Other 0x20000 filled in later */

	ROM_REGION(0x200000, "gfx3", ROMREGION_DISPOSE )
	ROM_LOAD( "maj-01", 0x000000, 0x100000, CRC(9840a204) SHA1(096c351769da5184c3d9a05495370134acc9507a) )
	ROM_LOAD( "maj-00", 0x100000, 0x100000, CRC(87ea8d16) SHA1(db47123aa2ebbb800cfc5cfcf50309bc39cadbcd) )

	ROM_REGION( 0x400000, "gfx4", ROMREGION_DISPOSE ) /* sprites chip 1 */
	ROM_LOAD( "maj-04", 0x000000, 0x80000, CRC(36e49b19) SHA1(bfbc45b635bf3d46ff8b8a514a3f352bf3a95535) )
	ROM_LOAD( "maj-05", 0x080000, 0x80000, CRC(80fc71cc) SHA1(65b15afbe5d628051b012777d486b6ce92a3795c) )
	ROM_LOAD( "maj-06", 0x100000, 0x80000, CRC(2e7a684b) SHA1(cffeda1a816dad30d6b1cb12458661188d625d40) )
	ROM_LOAD( "maj-07", 0x180000, 0x80000, CRC(3acc1f78) SHA1(87ec65b4f54a66370754534d03f4c9217531b42f) )
	ROM_LOAD( "maj-08", 0x200000, 0x80000, CRC(1958a36d) SHA1(466a30dcd2ea13028272ed2187f890ee20d6636b) )
	ROM_LOAD( "maj-09", 0x280000, 0x80000, CRC(c21087a1) SHA1(b769c5f2f9b9c525d121902fe9557a6bfc077b99) )
	ROM_LOAD( "maj-10", 0x300000, 0x80000, CRC(a02fa641) SHA1(14b999a441964e612700bf21945a948eaebb253e) )
	ROM_LOAD( "maj-11", 0x380000, 0x80000, CRC(dabe9305) SHA1(44d69fe55e674de7f4c610d295d4528d4b2eb150) )

	ROM_REGION( 0x80000, "gfx5", ROMREGION_DISPOSE ) /* sprites chip 2 */
	ROM_LOAD16_BYTE( "gs12",   0x000000, 0x20000, CRC(9a86a015) SHA1(968576b8422393ab9a93d98c15428b1c11417b3d) )
	ROM_LOAD16_BYTE( "gs13",   0x000001, 0x20000, CRC(f4709905) SHA1(697842a3d7bc2588c77833c3af8938e6f0b1238d) )
	ROM_LOAD16_BYTE( "gs14",   0x040000, 0x20000, CRC(750fc523) SHA1(ef8794359ff3a44a97ab402821fbe205a0be8f6a) )
	ROM_LOAD16_BYTE( "gs15",   0x040001, 0x20000, CRC(f14edd3d) SHA1(802d576df6dac2c9bf99f963f1955fc3a7ffdac0) )

	ROM_REGION(0x20000, "oki1", 0 ) /* Oki samples */
	ROM_LOAD( "gs07",  0x00000,  0x20000,  CRC(750b7e5d) SHA1(d33b17a1d8c9b05d5c1daf0c80fed6381e04b167) )

	ROM_REGION(0x80000, "oki2", 0 ) /* Extra Oki samples */
	ROM_LOAD( "maj-03", 0x00000, 0x80000,  CRC(31dcfac3) SHA1(88c7fc139f871991defbc8dc2c9c66b150dd6f6f) )	/* banked */

	ROM_REGION( 0x1000, "proms", 0 )
	ROM_LOAD( "mb7128y.10m", 0x00000,  0x800,  CRC(bde780a2) SHA1(94ea9fe6c3a421e976d077e67f564ca5c37a5e88) )	/* Priority?  Unused */
	ROM_LOAD( "mb7128y.16p", 0x00800,  0x800,  CRC(c44d2751) SHA1(7c195650689d5cbbdccba696e0e7d3dc5bb7c506) )	/* Timing??  Unused */
	/* Above prom also at 16s and 17s */

	ROM_REGION( 0x1000, "plds", ROMREGION_DISPOSE )
	ROM_LOAD( "pal16r8a 1h",  0x0000, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7c",  0x0200, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7d",  0x0400, 0x0104, CRC(199e83fd) SHA1(ebb5d66f29935b0a58e79b0db30611b5dce328a6) ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7e",  0x0600, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7l",  0x0800, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.8e",  0x0a00, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.9d",  0x0c00, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.10c", 0x0e00, 0x0104, NO_DUMP ) /* PAL is read protected */
ROM_END

ROM_START( dassaul4 )
	ROM_REGION(0x80000, "maincpu", 0 ) /* 68000 code */
	ROM_LOAD16_BYTE("gs01", 0x00000, 0x20000, CRC(8613634d) SHA1(69b64e54fde3b5f1ee3435d7327b84e7a7d43f6d) )
	ROM_LOAD16_BYTE("gs03", 0x00001, 0x20000, CRC(ea860bd4) SHA1(6e4e2d004433ad5842b4bc895eaa8f55bd1ee168) )
	ROM_LOAD16_BYTE("gs00", 0x40000, 0x20000, CRC(b7277175) SHA1(ffb19c4dd12e0391f01de57c46a7998885fe22bf) )
	ROM_LOAD16_BYTE("gs02", 0x40001, 0x20000, CRC(cde31e35) SHA1(0219845308c9f46e73b0504bd2aefa2fa74f388e) )

	ROM_REGION(0x80000, "sub", 0 ) /* 68000 code (Sub cpu) */
	ROM_LOAD16_BYTE("gs10",   0x00000, 0x20000, CRC(285f72a3) SHA1(d01972aec500805ca1abed14983064cd14e942d4) )
	ROM_LOAD16_BYTE("gs08",   0x00001, 0x20000, CRC(16691ede) SHA1(dc481dfc6104833a6fd18be6275e77ecc0510165) )
	ROM_LOAD16_BYTE("gs11",   0x40000, 0x20000, CRC(80cb23de) SHA1(d52426460eea2285c57cfc3fe37aa6dc79990e25) )
	ROM_LOAD16_BYTE("gs09",   0x40001, 0x20000, CRC(0a8fa7e1) SHA1(330ae9602b5f56b5dc4961a41991b64412a59880) )

	ROM_REGION(0x10000, "audiocpu", 0 ) /* Sound CPU */
	ROM_LOAD( "gs04",    0x00000, 0x10000, CRC(81c29ebf) SHA1(1b241277a8e35cdeaeb120970d14a09d33032459) )

	ROM_REGION(0x020000, "gfx1", ROMREGION_DISPOSE )
	ROM_LOAD16_BYTE( "gs05", 0x000000, 0x10000, CRC(0aae996a) SHA1(d37a12b057e9934212362d7eafa575c961819a27) )
	ROM_LOAD16_BYTE( "gs06", 0x000001, 0x10000, CRC(4efdf03d) SHA1(835d22829c6d0f4efc76801b449f9a779f460f1c) )

	ROM_REGION(0x120000, "gfx2", ROMREGION_DISPOSE )
	ROM_LOAD( "maj-02", 0x000000, 0x100000, CRC(383bbc37) SHA1(c537ab147a2770ce28ee185b08dd62d35249bfa9) )
	/* Other 0x20000 filled in later */

	ROM_REGION(0x200000, "gfx3", ROMREGION_DISPOSE )
	ROM_LOAD( "maj-01", 0x000000, 0x100000, CRC(9840a204) SHA1(096c351769da5184c3d9a05495370134acc9507a) )
	ROM_LOAD( "maj-00", 0x100000, 0x100000, CRC(87ea8d16) SHA1(db47123aa2ebbb800cfc5cfcf50309bc39cadbcd) )

	ROM_REGION( 0x400000, "gfx4", ROMREGION_DISPOSE ) /* sprites chip 1 */
	ROM_LOAD( "maj-04", 0x000000, 0x80000, CRC(36e49b19) SHA1(bfbc45b635bf3d46ff8b8a514a3f352bf3a95535) )
	ROM_LOAD( "maj-05", 0x080000, 0x80000, CRC(80fc71cc) SHA1(65b15afbe5d628051b012777d486b6ce92a3795c) )
	ROM_LOAD( "maj-06", 0x100000, 0x80000, CRC(2e7a684b) SHA1(cffeda1a816dad30d6b1cb12458661188d625d40) )
	ROM_LOAD( "maj-07", 0x180000, 0x80000, CRC(3acc1f78) SHA1(87ec65b4f54a66370754534d03f4c9217531b42f) )
	ROM_LOAD( "maj-08", 0x200000, 0x80000, CRC(1958a36d) SHA1(466a30dcd2ea13028272ed2187f890ee20d6636b) )
	ROM_LOAD( "maj-09", 0x280000, 0x80000, CRC(c21087a1) SHA1(b769c5f2f9b9c525d121902fe9557a6bfc077b99) )
	ROM_LOAD( "maj-10", 0x300000, 0x80000, CRC(a02fa641) SHA1(14b999a441964e612700bf21945a948eaebb253e) )
	ROM_LOAD( "maj-11", 0x380000, 0x80000, CRC(dabe9305) SHA1(44d69fe55e674de7f4c610d295d4528d4b2eb150) )

	ROM_REGION( 0x80000, "gfx5", ROMREGION_DISPOSE ) /* sprites chip 2 */
	ROM_LOAD16_BYTE( "gs12",   0x000000, 0x20000, CRC(9a86a015) SHA1(968576b8422393ab9a93d98c15428b1c11417b3d) )
	ROM_LOAD16_BYTE( "gs13",   0x000001, 0x20000, CRC(f4709905) SHA1(697842a3d7bc2588c77833c3af8938e6f0b1238d) )
	ROM_LOAD16_BYTE( "gs14",   0x040000, 0x20000, CRC(750fc523) SHA1(ef8794359ff3a44a97ab402821fbe205a0be8f6a) )
	ROM_LOAD16_BYTE( "gs15",   0x040001, 0x20000, CRC(f14edd3d) SHA1(802d576df6dac2c9bf99f963f1955fc3a7ffdac0) )

	ROM_REGION(0x20000, "oki1", 0 ) /* Oki samples */
	ROM_LOAD( "gs07",  0x00000,  0x20000,  CRC(750b7e5d) SHA1(d33b17a1d8c9b05d5c1daf0c80fed6381e04b167) )

	ROM_REGION(0x80000, "oki2", 0 ) /* Extra Oki samples */
	ROM_LOAD( "maj-03", 0x00000, 0x80000,  CRC(31dcfac3) SHA1(88c7fc139f871991defbc8dc2c9c66b150dd6f6f) )	/* banked */

	ROM_REGION( 0x1000, "proms", 0 )
	ROM_LOAD( "mb7128y.10m", 0x00000,  0x800,  CRC(bde780a2) SHA1(94ea9fe6c3a421e976d077e67f564ca5c37a5e88) )	/* Priority?  Unused */
	ROM_LOAD( "mb7128y.16p", 0x00800,  0x800,  CRC(c44d2751) SHA1(7c195650689d5cbbdccba696e0e7d3dc5bb7c506) )	/* Timing??  Unused */
	/* Above prom also at 16s and 17s */

	ROM_REGION( 0x1000, "plds", ROMREGION_DISPOSE )
	ROM_LOAD( "pal16r8a 1h",  0x0000, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7c",  0x0200, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7d",  0x0400, 0x0104, CRC(199e83fd) SHA1(ebb5d66f29935b0a58e79b0db30611b5dce328a6) ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7e",  0x0600, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7l",  0x0800, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.8e",  0x0a00, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.9d",  0x0c00, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.10c", 0x0e00, 0x0104, NO_DUMP ) /* PAL is read protected */
ROM_END

ROM_START( thndzone )
	ROM_REGION(0x80000, "maincpu", 0 ) /* 68000 code */
	ROM_LOAD16_BYTE("gz_01.bin", 0x00000, 0x20000, CRC(15e8c328) SHA1(8876b5fde77604c2fe4654271ceb341a8fa460c1) )
	ROM_LOAD16_BYTE("gz_03.bin", 0x00001, 0x20000, CRC(aab5c86e) SHA1(c3560b15360ddf14e8444d9f70724e698b2bd42f) )
	ROM_LOAD16_BYTE("gs00",   0x40000, 0x20000, CRC(b7277175) SHA1(ffb19c4dd12e0391f01de57c46a7998885fe22bf) ) /* Aka GT00 */
	ROM_LOAD16_BYTE("gs02",   0x40001, 0x20000, CRC(cde31e35) SHA1(0219845308c9f46e73b0504bd2aefa2fa74f388e) ) /* Aka GT02 etc */

	ROM_REGION(0x80000, "sub", 0 ) /* 68000 code (Sub cpu) */
	ROM_LOAD16_BYTE("gz_10.bin", 0x00000, 0x20000, CRC(79f919e9) SHA1(b6793173e310b1df07cf3e9209da1fbec3a8a05b) )
	ROM_LOAD16_BYTE("gz_08.bin", 0x00001, 0x20000, CRC(d47d7836) SHA1(8a5d3e8b89f5dfd6bac83f7b093ddb03d5ecef73) )
	ROM_LOAD16_BYTE("gs11",      0x40000, 0x20000, CRC(80cb23de) SHA1(d52426460eea2285c57cfc3fe37aa6dc79990e25) )
	ROM_LOAD16_BYTE("gs09",      0x40001, 0x20000, CRC(0a8fa7e1) SHA1(330ae9602b5f56b5dc4961a41991b64412a59880) )

	ROM_REGION(0x10000, "audiocpu", 0 ) /* Sound CPU */
	ROM_LOAD( "gs04",    0x00000, 0x10000, CRC(81c29ebf) SHA1(1b241277a8e35cdeaeb120970d14a09d33032459) )

	ROM_REGION(0x020000, "gfx1", ROMREGION_DISPOSE )
	ROM_LOAD16_BYTE( "gs05", 0x000000, 0x10000, CRC(0aae996a) SHA1(d37a12b057e9934212362d7eafa575c961819a27) )
	ROM_LOAD16_BYTE( "gs06", 0x000001, 0x10000, CRC(4efdf03d) SHA1(835d22829c6d0f4efc76801b449f9a779f460f1c) )

	ROM_REGION(0x120000, "gfx2", ROMREGION_DISPOSE )
	ROM_LOAD( "maj-02", 0x000000, 0x100000, CRC(383bbc37) SHA1(c537ab147a2770ce28ee185b08dd62d35249bfa9) )
	/* Other 0x20000 filled in later */

	ROM_REGION(0x200000, "gfx3", ROMREGION_DISPOSE )
	ROM_LOAD( "maj-01", 0x000000, 0x100000, CRC(9840a204) SHA1(096c351769da5184c3d9a05495370134acc9507a) )
	ROM_LOAD( "maj-00", 0x100000, 0x100000, CRC(87ea8d16) SHA1(db47123aa2ebbb800cfc5cfcf50309bc39cadbcd) )

	ROM_REGION( 0x400000, "gfx4", ROMREGION_DISPOSE ) /* sprites chip 1 */
	ROM_LOAD( "maj-04", 0x000000, 0x80000, CRC(36e49b19) SHA1(bfbc45b635bf3d46ff8b8a514a3f352bf3a95535) )
	ROM_LOAD( "maj-05", 0x080000, 0x80000, CRC(80fc71cc) SHA1(65b15afbe5d628051b012777d486b6ce92a3795c) )
	ROM_LOAD( "maj-06", 0x100000, 0x80000, CRC(2e7a684b) SHA1(cffeda1a816dad30d6b1cb12458661188d625d40) )
	ROM_LOAD( "maj-07", 0x180000, 0x80000, CRC(3acc1f78) SHA1(87ec65b4f54a66370754534d03f4c9217531b42f) )
	ROM_LOAD( "maj-08", 0x200000, 0x80000, CRC(1958a36d) SHA1(466a30dcd2ea13028272ed2187f890ee20d6636b) )
	ROM_LOAD( "maj-09", 0x280000, 0x80000, CRC(c21087a1) SHA1(b769c5f2f9b9c525d121902fe9557a6bfc077b99) )
	ROM_LOAD( "maj-10", 0x300000, 0x80000, CRC(a02fa641) SHA1(14b999a441964e612700bf21945a948eaebb253e) )
	ROM_LOAD( "maj-11", 0x380000, 0x80000, CRC(dabe9305) SHA1(44d69fe55e674de7f4c610d295d4528d4b2eb150) )

	ROM_REGION( 0x80000, "gfx5", ROMREGION_DISPOSE ) /* sprites chip 2 */
	ROM_LOAD16_BYTE( "gs12",   0x000000, 0x20000, CRC(9a86a015) SHA1(968576b8422393ab9a93d98c15428b1c11417b3d) )
	ROM_LOAD16_BYTE( "gs13",   0x000001, 0x20000, CRC(f4709905) SHA1(697842a3d7bc2588c77833c3af8938e6f0b1238d) )
	ROM_LOAD16_BYTE( "gs14",   0x040000, 0x20000, CRC(750fc523) SHA1(ef8794359ff3a44a97ab402821fbe205a0be8f6a) )
	ROM_LOAD16_BYTE( "gs15",   0x040001, 0x20000, CRC(f14edd3d) SHA1(802d576df6dac2c9bf99f963f1955fc3a7ffdac0) )

	ROM_REGION(0x20000, "oki1", 0 ) /* Oki samples */
	ROM_LOAD( "gs07",  0x00000,  0x20000,  CRC(750b7e5d) SHA1(d33b17a1d8c9b05d5c1daf0c80fed6381e04b167) )

	ROM_REGION(0x80000, "oki2", 0 ) /* Extra Oki samples */
	ROM_LOAD( "maj-03", 0x00000, 0x80000,  CRC(31dcfac3) SHA1(88c7fc139f871991defbc8dc2c9c66b150dd6f6f) )	/* banked */

	ROM_REGION( 0x1000, "proms", 0 )
	ROM_LOAD( "mb7128y.10m", 0x00000,  0x800,  CRC(bde780a2) SHA1(94ea9fe6c3a421e976d077e67f564ca5c37a5e88) )	/* Priority?  Unused */
	ROM_LOAD( "mb7128y.16p", 0x00800,  0x800,  CRC(c44d2751) SHA1(7c195650689d5cbbdccba696e0e7d3dc5bb7c506) )	/* Timing??  Unused */
	/* Above prom also at 16s and 17s */

	ROM_REGION( 0x1000, "plds", ROMREGION_DISPOSE )
	ROM_LOAD( "pal16r8a 1h",  0x0000, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7c",  0x0200, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7d",  0x0400, 0x0104, CRC(199e83fd) SHA1(ebb5d66f29935b0a58e79b0db30611b5dce328a6) ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7e",  0x0600, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.7l",  0x0800, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.8e",  0x0a00, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.9d",  0x0c00, 0x0104, NO_DUMP ) /* PAL is read protected */
	ROM_LOAD( "pal16l8b.10c", 0x0e00, 0x0104, NO_DUMP ) /* PAL is read protected */
ROM_END

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

static READ16_HANDLER( dassault_main_skip )
{
	int ret=dassault_ram[0];

	if (cpu_get_previouspc(space->cpu)==0x1170 && ret&0x8000)
		cpu_spinuntil_int(space->cpu);

	return ret;
}

static READ16_HANDLER( thndzone_main_skip )
{
	int ret=dassault_ram[0];

	if (cpu_get_pc(space->cpu)==0x114c && ret&0x8000)
		cpu_spinuntil_int(space->cpu);

	return ret;
}

static DRIVER_INIT( dassault )
{
	const UINT8 *src = memory_region(machine, "gfx1");
	UINT8 *dst = memory_region(machine, "gfx2");
	UINT8 *tmp = malloc_or_die(0x80000);

	/* Playfield 4 also has access to the char graphics, make things easier
    by just copying the chars to both banks (if I just used a different gfx
    bank then the colours would be wrong). */
	memcpy(tmp+0x000000,dst+0x80000,0x80000);
	memcpy(dst+0x090000,tmp+0x00000,0x80000);
	memcpy(dst+0x080000,src+0x00000,0x10000);
	memcpy(dst+0x110000,src+0x10000,0x10000);

	free(tmp);

	/* Save time waiting on vblank bit */
	memory_install_read16_handler(cpu_get_address_space(machine->cpu[0], ADDRESS_SPACE_PROGRAM), 0x3f8000, 0x3f8001, 0, 0, dassault_main_skip);
}

static DRIVER_INIT( thndzone )
{
	const UINT8 *src = memory_region(machine, "gfx1");
	UINT8 *dst = memory_region(machine, "gfx2");
	UINT8 *tmp = malloc_or_die(0x80000);

	/* Playfield 4 also has access to the char graphics, make things easier
    by just copying the chars to both banks (if I just used a different gfx
    bank then the colours would be wrong). */
	memcpy(tmp+0x000000,dst+0x80000,0x80000);
	memcpy(dst+0x090000,tmp+0x00000,0x80000);
	memcpy(dst+0x080000,src+0x00000,0x10000);
	memcpy(dst+0x110000,src+0x10000,0x10000);

	free(tmp);

	/* Save time waiting on vblank bit */
	memory_install_read16_handler(cpu_get_address_space(machine->cpu[0], ADDRESS_SPACE_PROGRAM), 0x3f8000, 0x3f8001, 0, 0, thndzone_main_skip);
}

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

GAME( 1991, thndzone, 0,        dassault, thndzone, thndzone, ROT0, "Data East Corporation", "Thunder Zone (World)", 0 )
GAME( 1991, dassault, thndzone, dassault, dassault, dassault, ROT0, "Data East Corporation", "Desert Assault (US)", 0 )
GAME( 1991, dassaul4, thndzone, dassault, dassaul4, dassault, ROT0, "Data East Corporation", "Desert Assault (US 4 Players)", 0 )
