// license:BSD-3-Clause
// copyright-holders:Paul Leaman
/***************************************************************************

    Battle Lane Vol. 5
    1986 Taito

    2x6809

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

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

#include "emu.h"
#include "cpu/m6809/m6809.h"
#include "sound/3526intf.h"
#include "includes/battlane.h"

/*************************************
 *
 *  Memory handlers
 *
 *************************************/

WRITE8_MEMBER(battlane_state::battlane_cpu_command_w)
{
	m_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(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 (~m_cpu_control & 0x08)
	{
	    m_maincpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
	    m_subcpu->set_input_line(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
	*/
	m_maincpu->set_input_line(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
	*/

	m_subcpu->set_input_line(M6809_IRQ_LINE, data & 0x02 ? CLEAR_LINE : HOLD_LINE);
}

INTERRUPT_GEN_MEMBER(battlane_state::battlane_cpu1_interrupt)
{
	/* See note in battlane_cpu_command_w */
	if (~m_cpu_control & 0x08)
	{
		device.execute().set_input_line(INPUT_LINE_NMI, PULSE_LINE);
		m_subcpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
	}
}


/*************************************
 *
 *  Address maps
 *
 *************************************/

static ADDRESS_MAP_START( battlane_map, AS_PROGRAM, 8, battlane_state )
	AM_RANGE(0x0000, 0x0fff) AM_RAM AM_SHARE("share1")
	AM_RANGE(0x1000, 0x17ff) AM_RAM_WRITE(battlane_tileram_w) AM_SHARE("tileram")
	AM_RANGE(0x1800, 0x18ff) AM_RAM_WRITE(battlane_spriteram_w) AM_SHARE("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("ymsnd", ym3526_device, read, write)
	AM_RANGE(0x1e00, 0x1e3f) AM_WRITE(battlane_palette_w)
	AM_RANGE(0x2000, 0x3fff) AM_RAM_WRITE(battlane_bitmap_w) AM_SHARE("share4")
	AM_RANGE(0x4000, 0xffff) AM_ROM
ADDRESS_MAP_END


/*************************************
 *
 *  Input ports
 *
 *************************************/

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_CUSTOM ) PORT_VBLANK("screen")

	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


/*************************************
 *
 *  Graphics definitions
 *
 *************************************/

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


/*************************************
 *
 *  Machine driver
 *
 *************************************/

void battlane_state::machine_start()
{
	save_item(NAME(m_video_ctrl));
	save_item(NAME(m_cpu_control));
}

void battlane_state::machine_reset()
{
	m_video_ctrl = 0;
	m_cpu_control = 0;
}

static MACHINE_CONFIG_START( battlane, battlane_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", M6809, 1500000)        /* 1.5 MHz ? */
	MCFG_CPU_PROGRAM_MAP(battlane_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", battlane_state,  battlane_cpu1_interrupt)

	MCFG_CPU_ADD("sub", M6809, 1500000)        /* 1.5 MHz ? */
	MCFG_CPU_PROGRAM_MAP(battlane_map)

	MCFG_QUANTUM_TIME(attotime::from_hz(6000))


	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
	MCFG_SCREEN_SIZE(32 * 8, 32 * 8)
	MCFG_SCREEN_VISIBLE_AREA(1 * 8, 31 * 8 - 1, 0 * 8, 32 * 8 - 1)
	MCFG_SCREEN_UPDATE_DRIVER(battlane_state, screen_update_battlane)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", battlane)
	MCFG_PALETTE_ADD("palette", 64)


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

	MCFG_SOUND_ADD("ymsnd", YM3526, 3000000)
	MCFG_YM3526_IRQ_HANDLER(DEVWRITELINE("maincpu", m6809_device, firq_line))
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END


/*************************************
 *
 *  ROM definition(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", 0 )
	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", 0 )
	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( battlane2 )
	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", 0 )
	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", 0 )
	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( battlane3 )
	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", 0 )
	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", 0 )
	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 driver(s)
 *
 *************************************/

GAME( 1986, battlane,  0,        battlane, battlane, driver_device, 0, ROT90, "Technos Japan (Taito license)", "Battle Lane! Vol. 5 (set 1)", MACHINE_SUPPORTS_SAVE )
GAME( 1986, battlane2, battlane, battlane, battlane, driver_device, 0, ROT90, "Technos Japan (Taito license)", "Battle Lane! Vol. 5 (set 2)", MACHINE_SUPPORTS_SAVE )
GAME( 1986, battlane3, battlane, battlane, battlane, driver_device, 0, ROT90, "Technos Japan (Taito license)", "Battle Lane! Vol. 5 (set 3)", MACHINE_SUPPORTS_SAVE )
