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

B-Wings  (c) 1984 Data East Corporation
Zaviga   (c) 1984 Data East Corporation

drivers by Acho A. Tang


JUL-2003

Known issues:

- The main program is responsible for sprite clipping but occational
  glitches can be seen at the top and bottom screen edges. (post rotate)

- B-Wings bosses sometimes flicker. (sync issue)

- The text layer has an unknown attribute. (needs verification)

- Zaviga's DIPs are incomplete. (manual missing)

*****************************************************************************/
// Directives

#include "driver.h"
#include "cpu/m6809/m6809.h"
#include "cpu/m6502/m6502.h"
#include "sound/ay8910.h"
#include "sound/dac.h"

#define BW_DEBUG 0

#define MAX_SOUNDS 16

//****************************************************************************
// Imports

extern gfx_layout bwing_tilelayout;

extern WRITE8_HANDLER( bwing_paletteram_w );
extern WRITE8_HANDLER( bwing_videoram_w );
extern WRITE8_HANDLER( bwing_spriteram_w );
extern WRITE8_HANDLER( bwing_scrollreg_w );
extern WRITE8_HANDLER( bwing_scrollram_w );
extern READ8_HANDLER( bwing_scrollram_r );
extern VIDEO_START( bwing );
extern VIDEO_UPDATE( bwing );

//****************************************************************************
// Local Vars

static UINT8 sound_fifo[MAX_SOUNDS];
static UINT8 *bwp123_membase[3], *bwp3_rombase;
static UINT8 *bwp1_sharedram1, *bwp2_sharedram1;
static size_t bwp3_romsize;
static int bwp3_nmimask, bwp3_u8F_d, ffcount, ffhead, fftail;

//****************************************************************************
// Interrupt Handlers

INTERRUPT_GEN ( bwp1_interrupt )
{
	static int coin = 0;
	UINT8 latch_data;

	switch (cpu_getiloops())
	{
		case 0:
			if (ffcount)
			{
				ffcount--;
				latch_data = sound_fifo[fftail];
				fftail = (fftail + 1) & (MAX_SOUNDS - 1);
				soundlatch_w(0, latch_data);
				cpunum_set_input_line(2, DECO16_IRQ_LINE, HOLD_LINE); // SNDREQ
			}
		break;

		case 1:
			if (~readinputport(4) & 0x03)
				{ if (!coin) { coin = 1; cpunum_set_input_line(0, INPUT_LINE_NMI, ASSERT_LINE); } }
			else
				coin = 0;
		break;

		case 2:
			if (readinputport(5)) cpunum_set_input_line(0, M6809_FIRQ_LINE, ASSERT_LINE);
		break;
	}
}


INTERRUPT_GEN ( bwp3_interrupt ) { if (!bwp3_nmimask) cpunum_set_input_line(2, INPUT_LINE_NMI, ASSERT_LINE); }

//****************************************************************************
// Memory and I/O Handlers

static WRITE8_HANDLER( bwp12_sharedram1_w ) { bwp1_sharedram1[offset] = bwp2_sharedram1[offset] = data; }
static WRITE8_HANDLER( bwp3_u8F_w ) { bwp3_u8F_d = data; } // prepares custom chip for various operations
static WRITE8_HANDLER( bwp3_nmiack_w ) { cpunum_set_input_line(2, INPUT_LINE_NMI, CLEAR_LINE); }
static WRITE8_HANDLER( bwp3_nmimask_w ) { bwp3_nmimask = data & 0x80; }


static READ8_HANDLER( bwp1_io_r )
{
	if (offset == 0) return(readinputport(0));
	if (offset == 1) return(readinputport(1));
	if (offset == 2) return(readinputport(2));
	if (offset == 3) return(readinputport(3));
	if (offset == 4) return(readinputport(4));

	return((bwp123_membase[0])[0x1b00 + offset]);
}


static WRITE8_HANDLER( bwp1_ctrl_w )
{
	switch (offset)
	{
		// MSSTB
		case 0: cpunum_set_input_line(1, M6809_IRQ_LINE, ASSERT_LINE); break;

		// IRQACK
		case 1: cpunum_set_input_line(0, M6809_IRQ_LINE, CLEAR_LINE); break;

		// FIRQACK
		case 2: cpunum_set_input_line(0, M6809_FIRQ_LINE, CLEAR_LINE); break;

		// NMIACK
		case 3: cpunum_set_input_line(0, INPUT_LINE_NMI, CLEAR_LINE); break;

		// SWAP(bank-swaps sprite RAM between 1800 & 1900; ignored bc. they're treated as a single chunk.)
		case 4: break;

		// SNDREQ
		case 5:
			if (data == 0x80) // protection trick to screw CPU1 & 3
				cpunum_set_input_line(1, INPUT_LINE_NMI, ASSERT_LINE); // SNMI
			else
			if (ffcount < MAX_SOUNDS)
			{
				ffcount++;
				sound_fifo[ffhead] = data;
				ffhead = (ffhead + 1) & (MAX_SOUNDS - 1);
			}
		break;

		// BANKSEL(supposed to bank-switch CPU0 4000-7fff(may also 8000-bfff) 00=bank 0, 80=bank 1, unused)
		case 6: break;

		// hardwired to SWAP
		case 7: break;
	}

	#if BW_DEBUG
		(bwp123_membase[0])[0x1c00 + offset] = data;
	#endif
}


static WRITE8_HANDLER( bwp2_ctrl_w )
{
	switch (offset)
	{
		case 0: cpunum_set_input_line(0, M6809_IRQ_LINE, ASSERT_LINE); break; // SMSTB

		case 1: cpunum_set_input_line(1, M6809_FIRQ_LINE, CLEAR_LINE); break;

		case 2: cpunum_set_input_line(1, M6809_IRQ_LINE, CLEAR_LINE); break;

		case 3: cpunum_set_input_line(1, INPUT_LINE_NMI, CLEAR_LINE); break;
	}

	#if BW_DEBUG
		(bwp123_membase[1])[0x1800 + offset] = data;
	#endif
}

//****************************************************************************
// CPU Memory Maps

// Main CPU
static ADDRESS_MAP_START( bwp1_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x1b00, 0x1b07) AM_READ(bwp1_io_r)
	AM_RANGE(0x0000, 0x1fff) AM_READ(MRA8_RAM)
	AM_RANGE(0x2000, 0x3fff) AM_READ(bwing_scrollram_r)
	AM_RANGE(0x4000, 0xffff) AM_READ(MRA8_ROM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( bwp1_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x07ff) AM_WRITE(bwp12_sharedram1_w) AM_BASE(&bwp1_sharedram1)
	AM_RANGE(0x0800, 0x0fff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0x1000, 0x13ff) AM_WRITE(bwing_videoram_w) AM_BASE(&videoram)
	AM_RANGE(0x1800, 0x19ff) AM_WRITE(bwing_spriteram_w) AM_BASE(&buffered_spriteram)
	AM_RANGE(0x1a00, 0x1aff) AM_WRITE(bwing_paletteram_w) AM_BASE(&paletteram)
	AM_RANGE(0x1b00, 0x1b07) AM_WRITE(bwing_scrollreg_w)
	AM_RANGE(0x1c00, 0x1c07) AM_WRITE(bwp1_ctrl_w)
	AM_RANGE(0x2000, 0x3fff) AM_WRITE(bwing_scrollram_w)
	AM_RANGE(0x1000, 0x1fff) AM_WRITE(MWA8_RAM) // falls through
	AM_RANGE(0x4000, 0xffff) AM_WRITE(MWA8_NOP) // "B-Wings US" writes to 9631-9632(debug?)
ADDRESS_MAP_END


// Sub CPU
static ADDRESS_MAP_START( bwp2_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x0fff) AM_READ(MRA8_RAM)
	AM_RANGE(0xa000, 0xffff) AM_READ(MRA8_ROM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( bwp2_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x07ff) AM_WRITE(bwp12_sharedram1_w) AM_BASE(&bwp2_sharedram1)
	AM_RANGE(0x0800, 0x0fff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0x1800, 0x1803) AM_WRITE(bwp2_ctrl_w)
	AM_RANGE(0xa000, 0xffff) AM_WRITE(MWA8_ROM)
ADDRESS_MAP_END


// Sound CPU
static ADDRESS_MAP_START( bwp3_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x01ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xa000, 0xa000) AM_READ(soundlatch_r)
	AM_RANGE(0xe000, 0xffff) AM_READ(MRA8_ROM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( bwp3_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x01ff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0x0200, 0x0200) AM_WRITE(DAC_0_signed_data_w)
	AM_RANGE(0x1000, 0x1000) AM_WRITE(bwp3_nmiack_w)
	AM_RANGE(0x2000, 0x2000) AM_WRITE(AY8910_write_port_0_w)
	AM_RANGE(0x4000, 0x4000) AM_WRITE(AY8910_control_port_0_w)
	AM_RANGE(0x6000, 0x6000) AM_WRITE(AY8910_write_port_1_w)
	AM_RANGE(0x8000, 0x8000) AM_WRITE(AY8910_control_port_1_w)
	AM_RANGE(0xd000, 0xd000) AM_WRITE(bwp3_nmimask_w)
	AM_RANGE(0xe000, 0xffff) AM_WRITE(MWA8_ROM) AM_BASE(&bwp3_rombase) AM_SIZE(&bwp3_romsize)
ADDRESS_MAP_END

static ADDRESS_MAP_START( bwp3_readport, ADDRESS_SPACE_IO, 8 )
	AM_RANGE(0x00, 0x00) AM_READ(input_port_6_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( bwp3_writeport, ADDRESS_SPACE_IO, 8 )
	AM_RANGE(0x00, 0x00) AM_WRITE(bwp3_u8F_w)
ADDRESS_MAP_END

//****************************************************************************
// I/O Port Maps

INPUT_PORTS_START( bwing )
	PORT_START
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 1C_3C ) )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_3C ) )
	PORT_DIPNAME( 0x10, 0x10, "Diag" )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x40, 0x40, "Invincibility" )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Infinite ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )


	PORT_START
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "5" )
	PORT_DIPSETTING(    0x01, "3" )
	PORT_DIPNAME( 0x06, 0x06, "Bonus" )
	PORT_DIPSETTING(    0x00, "40000" )
	PORT_DIPSETTING(    0x02, "20000 80000" )
	PORT_DIPSETTING(    0x04, "20000 60000" )
	PORT_DIPSETTING(    0x06, "20000 40000" )
	PORT_DIPNAME( 0x08, 0x08, "Enemy Crafts" )
	PORT_DIPSETTING(    0x00, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Normal ) )
	PORT_DIPNAME( 0x10, 0x10, "Enemy Missiles" )
	PORT_DIPSETTING(    0x00, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Normal ) )
	PORT_DIPNAME( 0x20, 0x20, "Freeze" )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x00, "Country" )
	PORT_DIPSETTING(    0x00, "Japan/US" )
	PORT_DIPSETTING(    0x40, "Japan Only" )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_VBLANK )

	PORT_START
	PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_TILT )

	PORT_START
	PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_VBLANK )

	PORT_START // a matter of taste
	PORT_DIPNAME( 0x07, 0x00, "RGB" )
	PORT_DIPSETTING(    0x00, "Default" )
	PORT_DIPSETTING(    0x01, "More Red" )
	PORT_DIPSETTING(    0x02, "More Green" )
	PORT_DIPSETTING(    0x03, "More Blue" )
	PORT_DIPSETTING(    0x04, "Max" )
INPUT_PORTS_END

//****************************************************************************
// Graphics Layouts

static const gfx_layout charlayout =
{
	8, 8,
	256,
	2,
	{ 0, 0x4000 },
	{ 7, 6, 5, 4, 3, 2, 1, 0 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
	8*8
};

static const gfx_layout spritelayout =
{
	16, 16,
	512,
	3,
	{ 0x40000, 0x20000, 0 },
	{ 7, 6, 5, 4, 3, 2, 1, 0, 128+7, 128+6, 128+5, 128+4, 128+3, 128+2, 128+1, 128+0 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
	  8*8, 9*8,10*8,11*8,12*8,13*8,14*8,15*8 },
	32*8
};


static const gfx_decode gfxdecodeinfo[] =
{
	{ REGION_GFX1,  0, &charlayout,       0x00, 1 }, // chars
	{ REGION_GFX2,  0, &spritelayout,     0x20, 2 }, // sprites
	{ REGION_USER1, 0, &bwing_tilelayout, 0x10, 2 }, // foreground tiles place holder
	{ REGION_USER1, 0, &bwing_tilelayout, 0x30, 2 }, // background tiles place holder
	{ -1 }
};

//****************************************************************************
// Hardware Definitions

MACHINE_RESET( bwing )
{
	bwp3_nmimask = 0;
	fftail = ffhead = ffcount = 0;
}



static MACHINE_DRIVER_START( bwing )

	// basic machine hardware
	MDRV_CPU_ADD(M6809, 2000000)
	MDRV_CPU_PROGRAM_MAP(bwp1_readmem, bwp1_writemem)
	MDRV_CPU_VBLANK_INT(bwp1_interrupt, 3)

	MDRV_CPU_ADD(M6809, 2000000)
	MDRV_CPU_PROGRAM_MAP(bwp2_readmem, bwp2_writemem)
//  MDRV_CPU_VBLANK_INT(irq1_line_assert, 1) // vblank triggers FIRQ on CPU2 by design (unused)

	MDRV_CPU_ADD(DECO16, 2000000)
	/* audio CPU */
	MDRV_CPU_PROGRAM_MAP(bwp3_readmem, bwp3_writemem)
	MDRV_CPU_IO_MAP(bwp3_readport, bwp3_writeport)
	MDRV_CPU_PERIODIC_INT(bwp3_interrupt, 1000)

	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(TIME_IN_USEC(600))	// must be long enough for polling
	MDRV_INTERLEAVE(300)		// high enough?

	MDRV_MACHINE_RESET(bwing)

	// video hardware
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_UPDATE_BEFORE_VBLANK)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 1*8, 31*8-1)
	MDRV_PALETTE_LENGTH(64)

	MDRV_VIDEO_START(bwing)
	MDRV_VIDEO_UPDATE(bwing)

	// sound hardware
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD(AY8910, 1500000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)

	MDRV_SOUND_ADD(AY8910, 1500000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)

	MDRV_SOUND_ADD(DAC, 0)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.10)
MACHINE_DRIVER_END

//****************************************************************************
// ROM Maps

ROM_START( bwings )
	// Top Board(SCU-01)
	ROM_REGION( 0x10000, REGION_CPU1, 0 ) // main CPU
	ROM_LOAD( "bw_bv-02-.10a",0x04000, 0x04000, CRC(6074a86b) SHA1(0ce1bd74450144fd3c6556787d6c5c5d4531d830) )  // different
	ROM_LOAD( "bw_bv-01.7a",  0x08000, 0x04000, CRC(b960c707) SHA1(086cb0f22fb59922bf0369bf6b382a241d979ec3) )
	ROM_LOAD( "bw_bv-00-.4a", 0x0c000, 0x04000, CRC(1f83804c) SHA1(afd5eb0822db4fd982062945ca27e66ed9680645) )  // different

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) // sub CPU
	ROM_LOAD( "bw_bv-06-.10d",0x0a000, 0x02000, CRC(ECA00FCB) SHA1(C7AFFBB900E3940257F8CEBC91266328A4A5DCA3) )  // different
	ROM_LOAD( "bw_bv-05-.9d", 0x0c000, 0x02000, CRC(1e393300) SHA1(8d847256eb5dbccf5f524ec3aa836073d70b4edc) )  // different
	ROM_LOAD( "bw_bv-04-.7d", 0x0e000, 0x02000, CRC(6548c5bb) SHA1(d12cc8d0d5692c3de766f5c42c818dd8f685760a) )  // different

	ROM_REGION( 0x10000, REGION_CPU3, 0 ) // sound CPU(encrypted)
	ROM_LOAD( "bw_bv-03.13a", 0x0e000, 0x02000, CRC(e8ac9379) SHA1(aaf5c20aa33ed05747a8a27739e9d09e094a518d) )

	// Bottom Board(CCU-01)
	ROM_REGION( 0x01000, REGION_GFX1, ROMREGION_DISPOSE ) // chars
	ROM_LOAD( "bw_bv-10.5c",  0x00000, 0x01000, CRC(edca6901) SHA1(402c80e7519cf3a43b9fef52c9923961220a48b6) )

	// Middle Board(MCU-01)
	ROM_REGION( 0x0c000, REGION_GFX2, ROMREGION_DISPOSE ) // sprites
	ROM_LOAD( "bw_bv-07.1l",  0x00000, 0x04000, CRC(3d5ab2be) SHA1(2b3a039914ebfcc3993da74853a67546fc22c191) )
	ROM_LOAD( "bw_bv-08.1k",  0x04000, 0x04000, CRC(7a585f1e) SHA1(99e5d947b6b1fa96b90c676a282376d67fc377f0) )
	ROM_LOAD( "bw_bv-09.1h",  0x08000, 0x04000, CRC(a14c0b57) SHA1(5033354793d77922f5ef7f268cbe212e551efadf) )

	// GPU Banks
	ROM_REGION( 0x08000, REGION_USER1, 0 )
	ROM_FILL(0x00000, 0x08000, 0)
ROM_END


ROM_START( bwingso )
	// Top Board(SCU-01)
	ROM_REGION( 0x10000, REGION_CPU1, 0 ) // main CPU
	ROM_LOAD( "bw_bv-02.10a", 0x04000, 0x04000, CRC(5ce74ab5) SHA1(b414f0bbe1c4c5b4c810bb4b9fba16aaf86520ff) )
	ROM_LOAD( "bw_bv-01.7a",  0x08000, 0x04000, CRC(b960c707) SHA1(086cb0f22fb59922bf0369bf6b382a241d979ec3) )
	ROM_LOAD( "bw_bv-00.4a",  0x0c000, 0x04000, CRC(926bef63) SHA1(d4bd2e91fa0abc5e9472d4b684c076bdc3c29f5b) )

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) // sub CPU
	ROM_LOAD( "bw_bv-06.10d", 0x0a000, 0x02000, CRC(91a21a4c) SHA1(042eed60119a861f6b3ccfbe68d880f182a8a8e1) )
	ROM_LOAD( "bw_bv-05.9d",  0x0c000, 0x02000, CRC(f283f39a) SHA1(9f7f4c39d49f4dfff73fe74cd457480e8a43a3c5) )
	ROM_LOAD( "bw_bv-04.7d",  0x0e000, 0x02000, CRC(29ae75b6) SHA1(48c94e996857f2ac995bcd25f0e67b9f7c17d807) )

	ROM_REGION( 0x10000, REGION_CPU3, 0 ) // sound CPU(encrypted)
	ROM_LOAD( "bw_bv-03.13a", 0x0e000, 0x02000, CRC(e8ac9379) SHA1(aaf5c20aa33ed05747a8a27739e9d09e094a518d) )

	// Bottom Board(CCU-01)
	ROM_REGION( 0x01000, REGION_GFX1, ROMREGION_DISPOSE ) // chars
	ROM_LOAD( "bw_bv-10.5c",  0x00000, 0x01000, CRC(edca6901) SHA1(402c80e7519cf3a43b9fef52c9923961220a48b6) )

	// Middle Board(MCU-01)
	ROM_REGION( 0x0c000, REGION_GFX2, ROMREGION_DISPOSE ) // sprites
	ROM_LOAD( "bw_bv-07.1l",  0x00000, 0x04000, CRC(3d5ab2be) SHA1(2b3a039914ebfcc3993da74853a67546fc22c191) )
	ROM_LOAD( "bw_bv-08.1k",  0x04000, 0x04000, CRC(7a585f1e) SHA1(99e5d947b6b1fa96b90c676a282376d67fc377f0) )
	ROM_LOAD( "bw_bv-09.1h",  0x08000, 0x04000, CRC(a14c0b57) SHA1(5033354793d77922f5ef7f268cbe212e551efadf) )

	// GPU Banks
	ROM_REGION( 0x08000, REGION_USER1, 0 )
	ROM_FILL(0x00000, 0x08000, 0)
ROM_END


ROM_START( bwingsa )
	// Top Board(SCU-01)
	ROM_REGION( 0x10000, REGION_CPU1, 0 ) // main CPU
	ROM_LOAD( "bw_bv-02.10a", 0x04000, 0x04000, CRC(5ce74ab5) SHA1(b414f0bbe1c4c5b4c810bb4b9fba16aaf86520ff) )
	ROM_LOAD( "bv02.bin",     0x06000, 0x02000, CRC(2f84654e) SHA1(11b5343219b46d03f686ea348181c509121b9e3c) ) // only the lower 8k is different
	ROM_LOAD( "bw_bv-01.7a",  0x08000, 0x04000, CRC(b960c707) SHA1(086cb0f22fb59922bf0369bf6b382a241d979ec3) )
	ROM_LOAD( "bv00.bin",     0x0c000, 0x04000, CRC(0bbc1222) SHA1(cfdf621a423a5ce4ba44a980e683d2abf044d6b9) ) // different

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) // sub CPU
	ROM_LOAD( "bw_bv-06.10d", 0x0a000, 0x02000, CRC(91a21a4c) SHA1(042eed60119a861f6b3ccfbe68d880f182a8a8e1) )
	ROM_LOAD( "bw_bv-05.9d",  0x0c000, 0x02000, CRC(f283f39a) SHA1(9f7f4c39d49f4dfff73fe74cd457480e8a43a3c5) )
	ROM_LOAD( "bw_bv-04.7d",  0x0e000, 0x02000, CRC(29ae75b6) SHA1(48c94e996857f2ac995bcd25f0e67b9f7c17d807) )

	ROM_REGION( 0x10000, REGION_CPU3, 0 ) // sound CPU(encrypted)
	ROM_LOAD( "bw_bv-03.13a", 0x0e000, 0x02000, CRC(e8ac9379) SHA1(aaf5c20aa33ed05747a8a27739e9d09e094a518d) )

	// Bottom Board(CCU-01)
	ROM_REGION( 0x01000, REGION_GFX1, ROMREGION_DISPOSE ) // chars
	ROM_LOAD( "bw_bv-10.5c",  0x00000, 0x01000, CRC(edca6901) SHA1(402c80e7519cf3a43b9fef52c9923961220a48b6) )

	// Middle Board(MCU-01)
	ROM_REGION( 0x0c000, REGION_GFX2, ROMREGION_DISPOSE ) // sprites
	ROM_LOAD( "bw_bv-07.1l",  0x00000, 0x04000, CRC(3d5ab2be) SHA1(2b3a039914ebfcc3993da74853a67546fc22c191) )
	ROM_LOAD( "bw_bv-08.1k",  0x04000, 0x04000, CRC(7a585f1e) SHA1(99e5d947b6b1fa96b90c676a282376d67fc377f0) )
	ROM_LOAD( "bw_bv-09.1h",  0x08000, 0x04000, CRC(a14c0b57) SHA1(5033354793d77922f5ef7f268cbe212e551efadf) )

	// GPU Banks
	ROM_REGION( 0x08000, REGION_USER1, 0 )
	ROM_FILL(0x00000, 0x08000, 0)
ROM_END

ROM_START( zaviga )
	// Top Board(DE-0169-0)
	ROM_REGION( 0x10000, REGION_CPU1, 0 ) // main CPU
	ROM_LOAD( "as04", 0x04000, 0x04000, CRC(b79f5da2) SHA1(b39748666d3f7fb1ac46d282cce09fe9531df6b1) )
	ROM_LOAD( "as02", 0x08000, 0x04000, CRC(6addd16a) SHA1(940637c49bf9f38c77176ed2ae212048e9e7fd8f) )
	ROM_LOAD( "as00", 0x0c000, 0x04000, CRC(c6ae4af0) SHA1(6f6f14385b20f9c9c312f816036c608fe8514b00) )

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) // sub CPU
	ROM_LOAD( "as08", 0x0a000, 0x02000, CRC(b6187b3a) SHA1(d2d7c5b185f59986f45d8ec3ddf9b95364e57d96) )
	ROM_LOAD( "as07", 0x0c000, 0x02000, CRC(dc1170e3) SHA1(c8e4d1564fd272d726d0e4ffd4f33f67f1b37cd7) )
	ROM_LOAD( "as06", 0x0e000, 0x02000, CRC(ba888f84) SHA1(f94de8553cd4704d9b3349ded881a7cc62fa9b57) )

	ROM_REGION( 0x10000, REGION_CPU3, 0 ) // sound CPU(encrypted)
	ROM_LOAD( "as05", 0x0e000, 0x02000, CRC(afe9b0ac) SHA1(3c653cd4fff7f4e00971249900b5a810b6e74dfe) )

	// Bottom Board(DE-0170-0)
	ROM_REGION( 0x01000, REGION_GFX1, ROMREGION_DISPOSE ) // chars
	ROM_LOAD( "as14", 0x00000, 0x01000, CRC(62132c1d) SHA1(6b101e220a440488da17de8446f4e2c8ec7c7de9) )

	// Middle Board(DE-0171-0)
	ROM_REGION( 0x0c000, REGION_GFX2, ROMREGION_DISPOSE ) // sprites
	ROM_LOAD( "as11", 0x00000, 0x04000, CRC(aa84af24) SHA1(af4ff085dc44b3d1493ec1c8b4a8d18dccecc872) )
	ROM_LOAD( "as12", 0x04000, 0x04000, CRC(84af9041) SHA1(8fbd5995ca8e708cd7fb9cdfcdb174e12084f526) )
	ROM_LOAD( "as13", 0x08000, 0x04000, CRC(15d0922b) SHA1(b8d715a9e610531472d516c19f6035adbce93c84) )

	// GPU Banks
	ROM_REGION( 0x08000, REGION_USER1, 0 )
	ROM_FILL(0x00000, 0x08000, 0)
ROM_END


ROM_START( zavigaj )
	// Top Board(DE-0169-0)
	ROM_REGION( 0x10000, REGION_CPU1, 0 ) // main CPU
	ROM_LOAD( "as04", 0x04000, 0x04000, CRC(b79f5da2) SHA1(b39748666d3f7fb1ac46d282cce09fe9531df6b1) )
	ROM_LOAD( "as02", 0x08000, 0x04000, CRC(6addd16a) SHA1(940637c49bf9f38c77176ed2ae212048e9e7fd8f) )
	ROM_LOAD( "as00", 0x0c000, 0x04000, CRC(c6ae4af0) SHA1(6f6f14385b20f9c9c312f816036c608fe8514b00) )

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) // sub CPU
	ROM_LOAD( "as08",     0x0a000, 0x02000, CRC(b6187b3a) SHA1(d2d7c5b185f59986f45d8ec3ddf9b95364e57d96) )
	ROM_LOAD( "as07",     0x0c000, 0x02000, CRC(dc1170e3) SHA1(c8e4d1564fd272d726d0e4ffd4f33f67f1b37cd7) )
	ROM_LOAD( "as06-.7d", 0x0e000, 0x02000, CRC(b02d270c) SHA1(beea3d44d367543b5b5075c5892580e690691e75) )  // different

	ROM_REGION( 0x10000, REGION_CPU3, 0 ) // sound CPU(encrypted)
	ROM_LOAD( "as05", 0x0e000, 0x02000, CRC(afe9b0ac) SHA1(3c653cd4fff7f4e00971249900b5a810b6e74dfe) )

	// Bottom Board(DE-0170-0)
	ROM_REGION( 0x01000, REGION_GFX1, ROMREGION_DISPOSE ) // chars
	ROM_LOAD( "as14", 0x00000, 0x01000, CRC(62132c1d) SHA1(6b101e220a440488da17de8446f4e2c8ec7c7de9) )

	// Middle Board(DE-0171-0)
	ROM_REGION( 0x0c000, REGION_GFX2, ROMREGION_DISPOSE ) // sprites
	ROM_LOAD( "as11", 0x00000, 0x04000, CRC(aa84af24) SHA1(af4ff085dc44b3d1493ec1c8b4a8d18dccecc872) )
	ROM_LOAD( "as12", 0x04000, 0x04000, CRC(84af9041) SHA1(8fbd5995ca8e708cd7fb9cdfcdb174e12084f526) )
	ROM_LOAD( "as13", 0x08000, 0x04000, CRC(15d0922b) SHA1(b8d715a9e610531472d516c19f6035adbce93c84) )

	// GPU Banks
	ROM_REGION( 0x08000, REGION_USER1, 0 )
	ROM_FILL(0x00000, 0x08000, 0)
ROM_END

//****************************************************************************
// Initializations

static void fix_bwp3(void)
{
	UINT8 *rom = bwp3_rombase;
	int i, j = bwp3_romsize;
	UINT8 ah, al;

	// swap nibbles
	for (i=0; i<j; i++) { ah = al = rom[i]; rom[i] = (ah >> 4) | (al << 4); }

	// relocate vectors
	rom[j-(0x10-0x4)] = rom[j-(0x10-0xb)] = rom[j-(0x10-0x6)];
	rom[j-(0x10-0x5)] = rom[j-(0x10-0xa)] = rom[j-(0x10-0x7)];
}


static DRIVER_INIT( bwing )
{
	bwp123_membase[0] = memory_region(REGION_CPU1);
	bwp123_membase[1] = memory_region(REGION_CPU2);
	bwp123_membase[2] = memory_region(REGION_CPU3);

	fix_bwp3();
}

//****************************************************************************
// Game Entries

GAME( 1984, bwings,       0, bwing, bwing, bwing, ROT90, "Data East Corporation", "B-Wings (Japan new Ver.)", 0 )
GAME( 1984, bwingso, bwings, bwing, bwing, bwing, ROT90, "Data East Corporation", "B-Wings (Japan old Ver.)", 0 )
GAME( 1984, bwingsa, bwings, bwing, bwing, bwing, ROT90, "Data East Corporation", "B-Wings (Alt Ver.?)", 0 )

GAME( 1984, zaviga,       0, bwing, bwing, bwing, ROT90, "Data East Corporation", "Zaviga", 0 )
GAME( 1984, zavigaj, zaviga, bwing, bwing, bwing, ROT90, "Data East Corporation", "Zaviga (Japan)", 0 )
