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

    Battle Lane Vol. 5
    1986 Taito

    2x6809

    Driver provided by Paul Leaman (paul@vortexcomputing.demon.co.uk)

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

#include "driver.h"
#include "cpu/m6809/m6809.h"
#include "sound/3526intf.h"

extern UINT8 *battlane_spriteram;
extern UINT8 *battlane_tileram;

extern WRITE8_HANDLER( battlane_palette_w );
extern WRITE8_HANDLER( battlane_scrollx_w );
extern WRITE8_HANDLER( battlane_scrolly_w );
extern WRITE8_HANDLER( battlane_tileram_w );
extern WRITE8_HANDLER( battlane_spriteram_w );
extern WRITE8_HANDLER( battlane_bitmap_w );
extern WRITE8_HANDLER( battlane_video_ctrl_w );

extern PALETTE_INIT( battlane );
extern VIDEO_START( battlane );
extern VIDEO_UPDATE( battlane );


/* CPU interrupt control register */
int battlane_cpu_control;

static WRITE8_HANDLER( battlane_cpu_command_w )
{
	battlane_cpu_control = data;

	/*
    CPU control register

        0x80    = Video Flip
        0x08    = NMI
        0x04    = CPU 0 IRQ   (0=Activate)
        0x02    = CPU 1 IRQ   (0=Activate)
        0x01    = Y Scroll MSB
    */

	flip_screen_set(space->machine, data & 0x80);

	/*
        I think that the NMI is an inhibitor. It is constantly set
        to zero whenever an NMIs are allowed.

        However, it could also be that setting to zero could
        cause the NMI to trigger. I really don't know.
    */

    /*
    if (~battlane_cpu_control & 0x08)
    {
        cputag_set_input_line(space->machine, "maincpu", INPUT_LINE_NMI, PULSE_LINE);
        cputag_set_input_line(space->machine, "sub", INPUT_LINE_NMI, PULSE_LINE);
    }
    */

	/*
        CPU2's SWI will trigger an 6809 IRQ on the master by resetting 0x04
        Master will respond by setting the bit back again
    */
    cputag_set_input_line(space->machine, "maincpu", M6809_IRQ_LINE,  data & 0x04 ? CLEAR_LINE : HOLD_LINE);

	/*
    Slave function call (e.g. ROM test):
    FA7F: 86 03       LDA   #$03    ; Function code
    FA81: 97 6B       STA   $6B
    FA83: 86 0E       LDA   #$0E
    FA85: 84 FD       ANDA  #$FD    ; Trigger IRQ
    FA87: 97 66       STA   $66
    FA89: B7 1C 03    STA   $1C03   ; Do Trigger
    FA8C: C6 40       LDB   #$40
    FA8E: D5 68       BITB  $68
    FA90: 27 FA       BEQ   $FA8C   ; Wait for slave IRQ pre-function dispatch
    FA92: 96 68       LDA   $68
    FA94: 84 01       ANDA  #$01
    FA96: 27 FA       BEQ   $FA92   ; Wait for bit to be set
    */

	cputag_set_input_line(space->machine, "sub", M6809_IRQ_LINE, data & 0x02 ? CLEAR_LINE : HOLD_LINE);
}

static ADDRESS_MAP_START( battlane_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x0fff) AM_RAM AM_SHARE(1)
	AM_RANGE(0x1000, 0x17ff) AM_RAM_WRITE(battlane_tileram_w) AM_SHARE(2) AM_BASE(&battlane_tileram)
	AM_RANGE(0x1800, 0x18ff) AM_RAM_WRITE(battlane_spriteram_w) AM_SHARE(3) AM_BASE(&battlane_spriteram)
	AM_RANGE(0x1c00, 0x1c00) AM_READ_PORT("P1") AM_WRITE(battlane_video_ctrl_w)
	AM_RANGE(0x1c01, 0x1c01) AM_READ_PORT("P2") AM_WRITE(battlane_scrollx_w)
	AM_RANGE(0x1c02, 0x1c02) AM_READ_PORT("DSW1") AM_WRITE(battlane_scrolly_w)
	AM_RANGE(0x1c03, 0x1c03) AM_READ_PORT("DSW2") AM_WRITE(battlane_cpu_command_w)
	AM_RANGE(0x1c04, 0x1c05) AM_DEVREADWRITE("ym", ym3526_r, ym3526_w)
	AM_RANGE(0x1e00, 0x1e3f) AM_WRITE(battlane_palette_w)
	AM_RANGE(0x2000, 0x3fff) AM_RAM_WRITE(battlane_bitmap_w) AM_SHARE(4)
	AM_RANGE(0x4000, 0xffff) AM_ROM
ADDRESS_MAP_END

static INTERRUPT_GEN( battlane_cpu1_interrupt )
{
	/* See note in battlane_cpu_command_w */

	if (~battlane_cpu_control & 0x08)
	{
		cpu_set_input_line(device, INPUT_LINE_NMI, PULSE_LINE);
		cputag_set_input_line(device->machine, "sub", INPUT_LINE_NMI, PULSE_LINE);
	}
}


static INPUT_PORTS_START( battlane )
	PORT_START("P1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 )

	PORT_START("P2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_VBLANK )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_B ) )		PORT_DIPLOCATION("SW1:1,2")
	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_A ) )		PORT_DIPLOCATION("SW1:3,4")
	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, DEF_STR( Demo_Sounds ) )	PORT_DIPLOCATION("SW1:5")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Cabinet ) )		PORT_DIPLOCATION("SW1:6")
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Difficulty ) )	PORT_DIPLOCATION("SW1:7,8")
	PORT_DIPSETTING(    0xc0, DEF_STR( Easy )  )
	PORT_DIPSETTING(    0x80, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Hard )  )
	PORT_DIPSETTING(    0x00, DEF_STR( Very_Hard ) )

	PORT_START("DSW2")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Lives ) )		PORT_DIPLOCATION("SW2:1,2")
	PORT_DIPSETTING(    0x03, "3" )
	PORT_DIPSETTING(    0x02, "4" )
	PORT_DIPSETTING(    0x01, "5" )
	PORT_DIPSETTING(    0x00, DEF_STR( Free_Play) )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Bonus_Life ) )	PORT_DIPLOCATION("SW2:3,4")
	PORT_DIPSETTING(    0x0c, "20K 50K+" )
	PORT_DIPSETTING(    0x08, "20K 70K+" )
	PORT_DIPSETTING(    0x04, "20K 90K+" )
	PORT_DIPSETTING(    0x00, DEF_STR( None ) )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_SERVICE1 )
INPUT_PORTS_END


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

static const gfx_layout tilelayout =
{
	16, 16,    /* 16*16 tiles */
	256,    /* 256 tiles */
	3,      /* 3 bits per pixel */
	{ 0x8000*8+4, 4, 0 },    /* plane offset */
	{
		3, 2, 1, 0,
		8+3, 8+2, 8+1, 8+0,
		16+3, 16+2, 16+1, 16+0,
		16+8+3, 16+8+2, 16+8+1, 16+8+0
	},
	{
		0*8*4, 1*8*4,  2*8*4,  3*8*4,  4*8*4,  5*8*4,  6*8*4,  7*8*4,
		8*8*4, 9*8*4, 10*8*4, 11*8*4, 12*8*4, 13*8*4, 14*8*4, 15*8*4
	},
	8*8*4*2     /* every char takes consecutive bytes */
};

static const gfx_layout tilelayout2 =
{
	16, 16,    /* 16*16 tiles */
	256,    /* 256 tiles */
	3,      /* 3 bits per pixel */
    { 0x8000*8, 0x4000*8+4, 0x4000*8+0 },    /* plane offset */
	{
		3, 2, 1, 0,
		8+3, 8+2, 8+1, 8+0,
		16+3, 16+2, 16+1, 16+0,
		16+8+3, 16+8+2, 16+8+1, 16+8+0
	},
	{
		0*8*4, 1*8*4,  2*8*4,  3*8*4,  4*8*4,  5*8*4,  6*8*4,  7*8*4,
		8*8*4, 9*8*4, 10*8*4, 11*8*4, 12*8*4, 13*8*4, 14*8*4, 15*8*4
	},
	8*8*4*2     /* every char takes consecutive bytes */
};


static GFXDECODE_START( battlane )
	GFXDECODE_ENTRY( "gfx1", 0, spritelayout,  0, 2 )	/* colors 0x00-0x0f */
	GFXDECODE_ENTRY( "gfx2", 0, tilelayout,   32, 4 )	/* colors 0x20-0x3f */
	GFXDECODE_ENTRY( "gfx2", 0, tilelayout2,  32, 4 )	/* colors 0x20-0x3f */
GFXDECODE_END


static void irqhandler(const device_config *device, int irq)
{
	cputag_set_input_line(device->machine, "maincpu", M6809_FIRQ_LINE, irq ? ASSERT_LINE : CLEAR_LINE);
}

static const ym3526_interface ym3526_config =
{
	irqhandler
};


static MACHINE_DRIVER_START( battlane )

	/* basic machine hardware */
	MDRV_CPU_ADD("maincpu", M6809, 1250000)        /* 1.25 MHz ? */
	MDRV_CPU_PROGRAM_MAP(battlane_map)
	MDRV_CPU_VBLANK_INT("screen", battlane_cpu1_interrupt)

	MDRV_CPU_ADD("sub", M6809, 1250000)        /* 1.25 MHz ? */
	MDRV_CPU_PROGRAM_MAP(battlane_map)

	MDRV_QUANTUM_TIME(HZ(6000))

	/* video hardware */
	MDRV_SCREEN_ADD("screen", RASTER)
	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(32 * 8, 32 * 8)
	MDRV_SCREEN_VISIBLE_AREA(1 * 8, 31 * 8 - 1, 0 * 8, 32 * 8 - 1)
	MDRV_GFXDECODE(battlane)
	MDRV_PALETTE_LENGTH(64)

	MDRV_VIDEO_START(battlane)
	MDRV_VIDEO_UPDATE(battlane)

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD("ym", YM3526, 3000000)
	MDRV_SOUND_CONFIG(ym3526_config)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END


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

  Game driver(s)

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

ROM_START( battlane )
	ROM_REGION( 0x8000, "user1", 0 )     /*  */
	ROM_LOAD( "da00-5",     0x0000, 0x8000, CRC(85b4ed73) SHA1(b8e61eedf8fb75bb07f1df91a7465cee2b6ff372) )

	ROM_REGION( 0x10000, "maincpu", 0 )
	/* first half of da00-5 will be copied at 0x4000-0x7fff */
	ROM_COPY( "user1", 0x0000, 0x4000, 0x4000 )
	ROM_LOAD( "da01-5",     0x8000, 0x8000, CRC(7a6c3f02) SHA1(bee1ee858f81453a53afc2d016f549924801b090) )

	ROM_REGION( 0x10000, "sub", 0 )     /* 64K for slave CPU */
	/* second half of da00-5 will be copied at 0x4000-0x7fff */
	ROM_COPY( "user1", 0x4000, 0x4000, 0x4000 )
	ROM_LOAD( "da02-2",     0x8000, 0x8000, CRC(69d8dafe) SHA1(a7dab13d7f05bf8e3220bb8193066e9b45c86a17) )

	ROM_REGION( 0x18000, "gfx1", ROMREGION_DISPOSE )
	ROM_LOAD( "da05",      0x00000, 0x8000, CRC(834829d4) SHA1(d56781d2a7ef89b645a637166cd5acde6a65f7f9) ) /* Sprites Plane 1+2 */
	ROM_LOAD( "da04",      0x08000, 0x8000, CRC(f083fd4c) SHA1(eb8f079776a0efd898574874d21f865311ecd8ba) ) /* Sprites Plane 3+4 */
	ROM_LOAD( "da03",      0x10000, 0x8000, CRC(cf187f25) SHA1(c0d2d85f85340c12c1b61cc062506ffa4841ef78) ) /* Sprites Plane 5+6 */

	ROM_REGION( 0x0c000, "gfx2", ROMREGION_DISPOSE )
	ROM_LOAD( "da06",      0x00000, 0x8000, CRC(9c6a51b3) SHA1(0d623e8fba9373979a93f97cdfcf311c7e7f561a) ) /* Tiles*/
	ROM_LOAD( "da07",      0x08000, 0x4000, CRC(56df4077) SHA1(f4b8047c3b4d5897ba91489bc76a9504d9941072) ) /* Tiles*/

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "82s123.7h", 0x00000, 0x0020, CRC(b9933663) SHA1(5d5c840caa0b8416ed7dd4890dd5f3e4a9e86511) )
	ROM_LOAD( "82s123.9n", 0x00020, 0x0020, CRC(06491e53) SHA1(d6cf5003798f9a9d555bca97844dcb2966cbac9d) )
ROM_END

ROM_START( battlan2 )
	ROM_REGION( 0x8000, "user1", 0 )
	ROM_LOAD( "da00-3",     0x0000, 0x8000, CRC(7a0a5d58) SHA1(ef97e5a64a668c437c18cda931c52bf39b580b4a) )

	ROM_REGION( 0x10000, "maincpu", 0 )
	/* first half of da00-3 will be copied at 0x4000-0x7fff */
	ROM_COPY( "user1", 0x0000, 0x4000, 0x4000 )
	ROM_LOAD( "da01-3",     0x8000, 0x8000, CRC(d9e40800) SHA1(dc87ae0d8631c220dbbddbf0e49b6bdaeb635269) )

	ROM_REGION( 0x10000, "sub", 0 )     /* 64K for slave CPU */
	/* second half of da00-3 will be copied at 0x4000-0x7fff */
	ROM_COPY( "user1", 0x4000, 0x4000, 0x4000 )
	ROM_LOAD( "da02-2",     0x8000, 0x8000, CRC(69d8dafe) SHA1(a7dab13d7f05bf8e3220bb8193066e9b45c86a17) )

	ROM_REGION( 0x18000, "gfx1", ROMREGION_DISPOSE )
	ROM_LOAD( "da05",      0x00000, 0x8000, CRC(834829d4) SHA1(d56781d2a7ef89b645a637166cd5acde6a65f7f9) ) /* Sprites Plane 1+2 */
	ROM_LOAD( "da04",      0x08000, 0x8000, CRC(f083fd4c) SHA1(eb8f079776a0efd898574874d21f865311ecd8ba) ) /* Sprites Plane 3+4 */
	ROM_LOAD( "da03",      0x10000, 0x8000, CRC(cf187f25) SHA1(c0d2d85f85340c12c1b61cc062506ffa4841ef78) ) /* Sprites Plane 5+6 */

	ROM_REGION( 0x0c000, "gfx2", ROMREGION_DISPOSE )
	ROM_LOAD( "da06",      0x00000, 0x8000, CRC(9c6a51b3) SHA1(0d623e8fba9373979a93f97cdfcf311c7e7f561a) ) /* Tiles*/
	ROM_LOAD( "da07",      0x08000, 0x4000, CRC(56df4077) SHA1(f4b8047c3b4d5897ba91489bc76a9504d9941072) ) /* Tiles*/

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "82s123.7h", 0x00000, 0x0020, CRC(b9933663) SHA1(5d5c840caa0b8416ed7dd4890dd5f3e4a9e86511) )
	ROM_LOAD( "82s123.9n", 0x00020, 0x0020, CRC(06491e53) SHA1(d6cf5003798f9a9d555bca97844dcb2966cbac9d) )
ROM_END

ROM_START( battlan3 )
	ROM_REGION( 0x8000, "user1", 0 )
	ROM_LOAD( "bl_04.rom",  0x0000, 0x8000, CRC(5681564c) SHA1(25b3a715e91976830d87c7c45b93b473df709241) )

	ROM_REGION( 0x10000, "maincpu", 0 )
	/* first half of bl_04.rom will be copied at 0x4000-0x7fff */
	ROM_COPY( "user1", 0x0000, 0x4000, 0x4000 )
	ROM_LOAD( "bl_05.rom",  0x8000, 0x8000, CRC(001c4bbe) SHA1(4320c0a85b5b3505ac7292673759e5288cf4187f) )

	ROM_REGION( 0x10000, "sub", 0 )     /* 64K for slave CPU */
	/* second half of bl_04.rom will be copied at 0x4000-0x7fff */
	ROM_COPY( "user1", 0x4000, 0x4000, 0x4000 )
	ROM_LOAD( "da02-2",     0x8000, 0x8000, CRC(69d8dafe) SHA1(a7dab13d7f05bf8e3220bb8193066e9b45c86a17) )

	ROM_REGION( 0x18000, "gfx1", ROMREGION_DISPOSE )
	ROM_LOAD( "da05",      0x00000, 0x8000, CRC(834829d4) SHA1(d56781d2a7ef89b645a637166cd5acde6a65f7f9) ) /* Sprites Plane 1+2 */
	ROM_LOAD( "da04",      0x08000, 0x8000, CRC(f083fd4c) SHA1(eb8f079776a0efd898574874d21f865311ecd8ba) ) /* Sprites Plane 3+4 */
	ROM_LOAD( "da03",      0x10000, 0x8000, CRC(cf187f25) SHA1(c0d2d85f85340c12c1b61cc062506ffa4841ef78) ) /* Sprites Plane 5+6 */

	ROM_REGION( 0x0c000, "gfx2", ROMREGION_DISPOSE )
	ROM_LOAD( "da06",      0x00000, 0x8000, CRC(9c6a51b3) SHA1(0d623e8fba9373979a93f97cdfcf311c7e7f561a) ) /* Tiles*/
	ROM_LOAD( "da07",      0x08000, 0x4000, CRC(56df4077) SHA1(f4b8047c3b4d5897ba91489bc76a9504d9941072) ) /* Tiles*/

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "82s123.7h", 0x00000, 0x0020, CRC(b9933663) SHA1(5d5c840caa0b8416ed7dd4890dd5f3e4a9e86511) )
	ROM_LOAD( "82s123.9n", 0x00020, 0x0020, CRC(06491e53) SHA1(d6cf5003798f9a9d555bca97844dcb2966cbac9d) )
ROM_END


GAME( 1986, battlane, 0,        battlane, battlane, 0, ROT90, "Technos Japan (Taito license)", "Battle Lane! Vol. 5 (set 1)", 0 )
GAME( 1986, battlan2, battlane, battlane, battlane, 0, ROT90, "Technos Japan (Taito license)", "Battle Lane! Vol. 5 (set 2)", 0 )
GAME( 1986, battlan3, battlane, battlane, battlane, 0, ROT90, "Technos Japan (Taito license)", "Battle Lane! Vol. 5 (set 3)", 0 )
