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// license:BSD-3-Clause
// copyright-holders:Manuel Abadia
/***************************************************************************

Baraduke    (c) 1985 Namco
Metro-Cross (c) 1985 Namco

Driver by Manuel Abadia <emumanu+mame@gmail.com>

The sprite and tilemap generator ICs are the same as in Namco System 86, but
System 86 has two tilemap generators instead of one.

Custom ICs:
----------
98XX     lamp/coin output
99XX     sound volume
CUS27    clock divider
CUS30    sound control
CUS31
CUS39    sprite generator
CUS41    address decoder
CUS42    dual scrolling tilemap address generator
CUS43    dual tilemap generator
CUS48    sprite address generator
CUS60    MCU (63701) aka 60A1


Baraduke
Namco, 1985

PCB Layout
----------

 2248961100
(2248963100)
|---------------------------------------------------|
|           BD1_8.4P                6116            |
|       43                                          |
|PR1.1N     BD1_7.4N       42       BD1_12.8N  2148 |
|                                                   |
|  PR2.2M   BD1_6.4M                BD1_11.8M  2148 |
|                                                   |
|                                   BD1_10.8L  2148 |
|2  DSWA DSWB                                       |
|2  31                    27        BD1_9.8K   39   |
|W      BD1_5.3J   49.152MHz                        |
|A                        6116                      |
|Y                                                  |
|       2148                                   48   |
|       2148     30                6116             |
|                                  6116             |
|                                  6116             |
|       6116                       6116   BD1_3.9C  |
|                                                   |
|       BD1_4B.3B                         BD1_2.9B  |
|                                                   |
|LA4460     60A1         41        6809   BD1_1.9A  |
|---------------------------------------------------|
Notes:
      Clocks:
      6809 clock : 1.536MHz (49.152 / 32)
      63701 clock: 1.536MHz (49.152 / 32)
      VSync      : 60.606060Hz

      RAMs:
      6116: 2K x8 SRAM
      2148: 1K x4 SRAM

      Namco Customs:
      27   : DIP40, manufactured by Fujitsu)
      30   : (SDIP64)
      31   : (DIP48, also written on chip is '218' and '5201')
      39   : (DIP42, manufactured by Fujitsu)
      41   : (DIP40, also written on chip is '8512MAD' and 'PHILIPPINES')
      42   : (QFP80, the only chip on the PCB that is surface-mounted)
      60A1 : (DIP40, known 63701 MCU)
      43   : (SDIP64)
      48   : (SDIP64)

      ROMs:
      PR1.1N is a PROM type MB7138E
      PR2.2M is a PROM type MB7128E
      BD1_3.9C & BD1_5.3J are 2764 EPROMs. All other ROMs are 27128 EPROMs.



Notes:
-----
- in floor 6 of baraduke, there are gaps in the big boss when the player moves.
  This is the correct behaviour, verified on the real board.

TODO:
----
- The two unknown writes for the MCU are probably watchdog reset and irq acknowledge,
  but they don't seem to work as expected. During the first few frames they are
  written out of order and hooking them up in the usual way causes the MCU to
  stop receiving interrupts.

- remove the sound kludge in Baraduke. This might actually be a feature of the
  CUS30 chip.


DIP locations verified for:
--------------------------
- baraduke (manual JP)
- metrocrs (manual US, JP)

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

#include "emu.h"
#include "includes/baraduke.h"

#include "cpu/m6809/m6809.h"
#include "cpu/m6800/m6801.h"
#include "machine/watchdog.h"
#include "screen.h"
#include "speaker.h"


WRITE8_MEMBER(baraduke_state::inputport_select_w)
{
	if ((data & 0xe0) == 0x60)
		m_inputport_selected = data & 0x07;
	else if ((data & 0xe0) == 0xc0)
	{
		machine().bookkeeping().coin_lockout_global_w(~data & 1);
		machine().bookkeeping().coin_counter_w(0,data & 2);
		machine().bookkeeping().coin_counter_w(1,data & 4);
	}
}

READ8_MEMBER(baraduke_state::inputport_r)
{
	switch (m_inputport_selected)
	{
		case 0x00:  /* DSW A (bits 0-4) */
			return (ioport("DSWA")->read() & 0xf8) >> 3;
		case 0x01:  /* DSW A (bits 5-7), DSW B (bits 0-1) */
			return ((ioport("DSWA")->read() & 0x07) << 2) | ((ioport("DSWB")->read() & 0xc0) >> 6);
		case 0x02:  /* DSW B (bits 2-6) */
			return (ioport("DSWB")->read() & 0x3e) >> 1;
		case 0x03:  /* DSW B (bit 7), DSW C (bits 0-3) */
			return ((ioport("DSWB")->read() & 0x01) << 4) | (ioport("EDGE")->read() & 0x0f);
		case 0x04:  /* coins, start */
			return ioport("IN0")->read();
		case 0x05:  /* 2P controls */
			return ioport("IN2")->read();
		case 0x06:  /* 1P controls */
			return ioport("IN1")->read();
		default:
			return 0xff;
	}
}

WRITE8_MEMBER(baraduke_state::baraduke_lamps_w)
{
	m_lamp[0] = BIT(data, 3);
	m_lamp[1] = BIT(data, 4);
}

WRITE8_MEMBER(baraduke_state::baraduke_irq_ack_w)
{
	m_maincpu->set_input_line(0, CLEAR_LINE);
}



void baraduke_state::baraduke_map(address_map &map)
{
	map(0x0000, 0x1fff).rw(this, FUNC(baraduke_state::baraduke_spriteram_r), FUNC(baraduke_state::baraduke_spriteram_w)).share("spriteram");  /* Sprite RAM */
	map(0x2000, 0x3fff).rw(this, FUNC(baraduke_state::baraduke_videoram_r), FUNC(baraduke_state::baraduke_videoram_w)).share("videoram"); /* Video RAM */
	map(0x4000, 0x43ff).rw(m_cus30, FUNC(namco_cus30_device::namcos1_cus30_r), FUNC(namco_cus30_device::namcos1_cus30_w));       /* PSG device, shared RAM */
	map(0x4800, 0x4fff).rw(this, FUNC(baraduke_state::baraduke_textram_r), FUNC(baraduke_state::baraduke_textram_w)).share("textram");/* video RAM (text layer) */
	map(0x8000, 0x8000).w("watchdog", FUNC(watchdog_timer_device::reset_w)); /* watchdog reset */
	map(0x8800, 0x8800).w(this, FUNC(baraduke_state::baraduke_irq_ack_w));       /* irq acknowledge */
	map(0xb000, 0xb002).w(this, FUNC(baraduke_state::baraduke_scroll0_w));       /* scroll (layer 0) */
	map(0xb004, 0xb006).w(this, FUNC(baraduke_state::baraduke_scroll1_w));       /* scroll (layer 1) */
	map(0x6000, 0xffff).rom();                             /* ROM */
}

READ8_MEMBER(baraduke_state::soundkludge_r)
{
	return ((m_counter++) >> 4) & 0xff;
}

void baraduke_state::mcu_map(address_map &map)
{
	map(0x0000, 0x001f).rw("mcu", FUNC(hd63701_cpu_device::m6801_io_r), FUNC(hd63701_cpu_device::m6801_io_w));/* internal registers */
	map(0x0080, 0x00ff).ram();                             /* built in RAM */
	map(0x1000, 0x13ff).rw(m_cus30, FUNC(namco_cus30_device::namcos1_cus30_r), FUNC(namco_cus30_device::namcos1_cus30_w)); /* PSG device, shared RAM */
	map(0x1105, 0x1105).r(this, FUNC(baraduke_state::soundkludge_r));             /* cures speech */
	map(0x8000, 0xbfff).rom();                             /* MCU external ROM */
	map(0x8000, 0x8000).nopw();                        /* watchdog reset? */
	map(0x8800, 0x8800).nopw();                        /* irq acknoledge? */
	map(0xc000, 0xc7ff).ram();                             /* RAM */
	map(0xf000, 0xffff).rom();                             /* MCU internal ROM */
}


READ8_MEMBER(baraduke_state::readFF)
{
	return 0xff;
}

void baraduke_state::mcu_port_map(address_map &map)
{
	map(M6801_PORT1, M6801_PORT1).r(this, FUNC(baraduke_state::inputport_r));         /* input ports read */
	map(M6801_PORT1, M6801_PORT1).w(this, FUNC(baraduke_state::inputport_select_w)); /* input port select */
	map(M6801_PORT2, M6801_PORT2).r(this, FUNC(baraduke_state::readFF));  /* leds won't work otherwise */
	map(M6801_PORT2, M6801_PORT2).w(this, FUNC(baraduke_state::baraduke_lamps_w));       /* lamps */
}



static INPUT_PORTS_START( baraduke )
	PORT_START("DSWA")
	PORT_SERVICE_DIPLOC(0x80, IP_ACTIVE_LOW, "SWA:1" )
	PORT_DIPNAME( 0x60, 0x60, DEF_STR( Lives ) )        PORT_DIPLOCATION("SWA:2,3")
	PORT_DIPSETTING(    0x40, "2" )
	PORT_DIPSETTING(    0x60, "3" )
	PORT_DIPSETTING(    0x20, "4" )
	PORT_DIPSETTING(    0x00, "5" )
	PORT_DIPNAME( 0x18, 0x18, DEF_STR( Coin_A ) )       PORT_DIPLOCATION("SWA:4,5")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_2C ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Demo_Sounds ) )  PORT_DIPLOCATION("SWA:6")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_B ) )       PORT_DIPLOCATION("SWA:7,8")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_2C ) )

	PORT_START("DSWB")
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Bonus_Life ) )   PORT_DIPLOCATION("SWB:1,2")
	PORT_DIPSETTING(    0x80, "Every 10k" )             // "B"
	PORT_DIPSETTING(    0xc0, "10k And Every 20k" )     // "A" (default)
	PORT_DIPSETTING(    0x40, "Every 20k" )             // "C"
	PORT_DIPSETTING(    0x00, DEF_STR( None ) )         // "D"
	PORT_DIPNAME( 0x30, 0x30, DEF_STR( Difficulty ) )   PORT_DIPLOCATION("SWB:3,4")
	PORT_DIPSETTING(    0x20, DEF_STR( Easy ) )         // "B"
	PORT_DIPSETTING(    0x30, DEF_STR( Normal ) )       // "A" (default)
	PORT_DIPSETTING(    0x10, DEF_STR( Hard ) )         // "C"
	PORT_DIPSETTING(    0x00, DEF_STR( Very_Hard ) )    // "D"
	/*  To advance rounds: set SWB:5 to ON, coin up game and push 1P start.
	    Use joystick to select round 1 - 48. Set SWB:5 to OFF to play selected round. */
	PORT_DIPNAME( 0x08, 0x08, "Round Select" )          PORT_DIPLOCATION("SWB:5")
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, "Freeze" )                PORT_DIPLOCATION("SWB:6")
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, "Allow Continue From Last Level" ) PORT_DIPLOCATION("SWB:7")
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPUNUSED_DIPLOC( 0x01, 0x01, "SWB:8" )        /* Listed as "Unused" */

	PORT_START("EDGE")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SERVICE )        /* service switch from the edge connector */
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Cabinet ) )      PORT_DIPLOCATION("EDGE21:1") /* edge connector Pin 21 */
	PORT_DIPSETTING(    0x02, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	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_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("IN2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END

static INPUT_PORTS_START( metrocrs )
	PORT_INCLUDE( baraduke )

	PORT_MODIFY("DSWA")
	PORT_DIPNAME( 0x60, 0x60, DEF_STR( Coin_A ) )       PORT_DIPLOCATION("SWA:2,3")
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 1C_2C ) )
	PORT_DIPNAME( 0x18, 0x18, DEF_STR( Difficulty ) )   PORT_DIPLOCATION("SWA:4,5")
	PORT_DIPSETTING(    0x10, DEF_STR( Easy ) )         // "B"
	PORT_DIPSETTING(    0x18, DEF_STR( Normal ) )       // "A" (default)
	PORT_DIPSETTING(    0x08, DEF_STR( Hard ) )         // "C"
	PORT_DIPSETTING(    0x00, DEF_STR( Very_Hard ) )    // "D"
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Allow_Continue ) ) PORT_DIPLOCATION("SWA:6") // metrocrs: after round 8, metrocrsa: after round 4
	PORT_DIPSETTING(    0x00, DEF_STR( No ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Yes ) )

	PORT_MODIFY("DSWB")
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Demo_Sounds ) )  PORT_DIPLOCATION("SWB:1")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
	/*  To advance rounds: set SWB:2 to ON, coin up game and push 1P start.
	    Use joystick to select round 1 - 32. Set SWB:2 to OFF to play selected round. */
	PORT_DIPNAME( 0x40, 0x40, "Round Select" )          PORT_DIPLOCATION("SWB:2")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, "Freeze" )                PORT_DIPLOCATION("SWB:3")
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPUNUSED_DIPLOC( 0x10, 0x10, "SWB:4" )        /* Listed as "Unused" */
	PORT_DIPUNUSED_DIPLOC( 0x08, 0x08, "SWB:5" )        /* Listed as "Unused" */
	PORT_DIPUNUSED_DIPLOC( 0x04, 0x04, "SWB:6" )        /* Listed as "Unused" */
	PORT_DIPUNUSED_DIPLOC( 0x02, 0x02, "SWB:7" )        /* Listed as "Unused" */
INPUT_PORTS_END


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

static const gfx_layout tile_layout =
{
	8,8,
	1024,
	3,
	{ 0x8000*8, 0, 4 },
	{ 0, 1, 2, 3, 8+0, 8+1, 8+2, 8+3 },
	{ 0*8, 2*8, 4*8, 6*8, 8*8, 10*8, 12*8, 14*8 },
	16*8
};

static const gfx_layout spritelayout =
{
	16,16,
	RGN_FRAC(1,1),
	4,
	{ 0, 1, 2, 3 },
	{ 0*4, 1*4, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4,
		8*4, 9*4, 10*4, 11*4, 12*4, 13*4, 14*4, 15*4 },
	{ 8*8*0, 8*8*1, 8*8*2, 8*8*3, 8*8*4, 8*8*5, 8*8*6, 8*8*7,
	8*8*8, 8*8*9, 8*8*10, 8*8*11, 8*8*12, 8*8*13, 8*8*14, 8*8*15 },
	128*8
};

static GFXDECODE_START( gfx_baraduke )
	GFXDECODE_ENTRY( "gfx1", 0,      text_layout,  0, 512 )
	GFXDECODE_ENTRY( "gfx2", 0x0000, tile_layout,  0, 256 )
	GFXDECODE_ENTRY( "gfx2", 0x4000, tile_layout,  0, 256 )
	GFXDECODE_ENTRY( "gfx3", 0,      spritelayout, 0, 128 )
GFXDECODE_END


void baraduke_state::machine_start()
{
	m_lamp.resolve();
}


MACHINE_CONFIG_START(baraduke_state::baraduke)

	/* basic machine hardware */
	MCFG_DEVICE_ADD("maincpu", MC6809E, XTAL(49'152'000)/32) // 68A09E
	MCFG_DEVICE_PROGRAM_MAP(baraduke_map)

	MCFG_DEVICE_ADD("mcu", HD63701, XTAL(49'152'000)/8)
	MCFG_DEVICE_PROGRAM_MAP(mcu_map)
	MCFG_DEVICE_IO_MAP(mcu_port_map)

	MCFG_QUANTUM_TIME(attotime::from_hz(6000))      /* we need heavy synch */

	MCFG_WATCHDOG_ADD("watchdog")

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_RAW_PARAMS(XTAL(49'152'000)/8, 384, 0, 36*8, 264, 2*8, 30*8)
	MCFG_SCREEN_UPDATE_DRIVER(baraduke_state, screen_update_baraduke)
	MCFG_SCREEN_VBLANK_CALLBACK(WRITELINE(*this, baraduke_state, screen_vblank_baraduke))
	MCFG_SCREEN_PALETTE("palette")

	MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_baraduke)
	MCFG_PALETTE_ADD("palette", 2048)
	MCFG_PALETTE_INIT_OWNER(baraduke_state, baraduke)

	/* sound hardware */
	SPEAKER(config, "mono").front_center();

	MCFG_DEVICE_ADD("namco", NAMCO_CUS30, XTAL(49'152'000)/2048)
	MCFG_NAMCO_AUDIO_VOICES(8)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END



ROM_START( aliensec )
	ROM_REGION( 0x10000, "maincpu", 0 ) /* 6809 code */
	ROM_LOAD( "bd1_3.9c", 0x6000, 0x02000, CRC(ea2ea790) SHA1(ab6f523803b2b0ea04b78f2f252de6c2d344a26c) )
	ROM_LOAD( "bd2_1.9a", 0x8000, 0x04000, CRC(9a0a9a87) SHA1(6d88fb5b443c822ede4884d4452e333834b16aca) )
	ROM_LOAD( "bd2_2.9b", 0xc000, 0x04000, CRC(383e5458) SHA1(091f25e287f0a81649c9a4fa196ebe4112a82295) )

	ROM_REGION(  0x10000 , "mcu", 0 ) /* MCU code */
	ROM_LOAD( "bd1_4.3b",       0x8000, 0x4000, CRC(abda0fe7) SHA1(f7edcb5f9fa47bb38a8207af5678cf4ccc243547) )  /* subprogram for the MCU */
	ROM_LOAD( "cus60-60a1.mcu", 0xf000, 0x1000, CRC(076ea82a) SHA1(22b5e62e26390d7d5cacc0503c7aa5ed524204df) )  /* MCU internal code */

	ROM_REGION( 0x02000, "gfx1", 0 )
	ROM_LOAD( "bd1_5.3j", 0x00000, 0x2000, CRC(706b7fee) SHA1(e5694289bd4346c1a3a004feaa940710cea755c6) )   /* characters */

	ROM_REGION( 0x10000, "gfx2", 0 )
	ROM_LOAD( "bd2_8.4p", 0x00000, 0x4000, CRC(432bd7d9) SHA1(876e071b514864d434ab49002c5432f9c88665c1) )   /* tiles */
	ROM_LOAD( "bd1_7.4n", 0x04000, 0x4000, CRC(0d7ebec9) SHA1(6b86b476db61f5760bc8610b51adc1115cfdad96) )
	ROM_LOAD( "bd2_6.4m", 0x08000, 0x4000, CRC(f4c1df60) SHA1(8a3a6682884b227fe4293adb09624a4389ee660d) )
	/* 0xc000-0xffff  will be unpacked from 0x8000-0xbfff */

	ROM_REGION( 0x10000, "gfx3", 0 )
	ROM_LOAD( "bd1_9.8k",  0x00000, 0x4000, CRC(87a29acc) SHA1(3aa00efc95d1da50f6e4637d101640328287dea1) )  /* sprites */
	ROM_LOAD( "bd1_10.8l", 0x04000, 0x4000, CRC(72b6d20c) SHA1(e40b48dacefce4fd62ab28d3e6ff3932d4ff005b) )
	ROM_LOAD( "bd1_11.8m", 0x08000, 0x4000, CRC(3076af9c) SHA1(57ce09b298fd0bae94e4d8c817a34ce812c3ddfc) )
	ROM_LOAD( "bd1_12.8n", 0x0c000, 0x4000, CRC(8b4c09a3) SHA1(46e0ef39cb313c6780f6137769153dc4a054c77f) )

	ROM_REGION( 0x1000, "proms", 0 )
	ROM_LOAD( "bd1-1.1n", 0x0000, 0x0800, CRC(0d78ebc6) SHA1(0a0c1e23eb4d1748c4e6c448284d785286c77911) )    /* Blue + Green palette (prom type mb7138e) */
	ROM_LOAD( "bd1-2.2m", 0x0800, 0x0800, CRC(03f7241f) SHA1(16ae059f084ba0ac4ddaa95dbeed113295f106ea) )    /* Red palette (prom type mb7128e) */
ROM_END

ROM_START( baraduke )
	ROM_REGION( 0x10000, "maincpu", 0 ) /* 6809 code */
	ROM_LOAD( "bd1_3.9c", 0x6000, 0x02000, CRC(ea2ea790) SHA1(ab6f523803b2b0ea04b78f2f252de6c2d344a26c) )
	ROM_LOAD( "bd1_1.9a", 0x8000, 0x04000, CRC(4e9f2bdc) SHA1(bc6e71d4d3b2064e662a105c1a77d2731070d58e) )
	ROM_LOAD( "bd1_2.9b", 0xc000, 0x04000, CRC(40617fcd) SHA1(51d17f3a2fc96e13c8ef5952efece526e0fb33f4) )

	ROM_REGION(  0x10000 , "mcu", 0 ) /* MCU code */
	ROM_LOAD( "bd1_4b.3b",      0x8000, 0x4000, CRC(a47ecd32) SHA1(a2a75e65deb28224a5729ed134ee4d5ea8c50706) )  /* subprogram for the MCU */
	ROM_LOAD( "cus60-60a1.mcu", 0xf000, 0x1000, CRC(076ea82a) SHA1(22b5e62e26390d7d5cacc0503c7aa5ed524204df) )  /* MCU internal code */

	ROM_REGION( 0x02000, "gfx1", 0 )
	ROM_LOAD( "bd1_5.3j", 0x00000, 0x2000, CRC(706b7fee) SHA1(e5694289bd4346c1a3a004feaa940710cea755c6) )   /* characters */

	ROM_REGION( 0x10000, "gfx2", 0 )
	ROM_LOAD( "bd1_8.4p", 0x00000, 0x4000, CRC(b0bb0710) SHA1(797832aea59bf80342fd2a3505645f2766bde65b) )   /* tiles */
	ROM_LOAD( "bd1_7.4n", 0x04000, 0x4000, CRC(0d7ebec9) SHA1(6b86b476db61f5760bc8610b51adc1115cfdad96) )
	ROM_LOAD( "bd1_6.4m", 0x08000, 0x4000, CRC(e5da0896) SHA1(abb8bf7e9dc1c60bc0a20a691109fb145bb1d8e0) )
	/* 0xc000-0xffff  will be unpacked from 0x8000-0xbfff */

	ROM_REGION( 0x10000, "gfx3", 0 )
	ROM_LOAD( "bd1_9.8k",  0x00000, 0x4000, CRC(87a29acc) SHA1(3aa00efc95d1da50f6e4637d101640328287dea1) )  /* sprites */
	ROM_LOAD( "bd1_10.8l", 0x04000, 0x4000, CRC(72b6d20c) SHA1(e40b48dacefce4fd62ab28d3e6ff3932d4ff005b) )
	ROM_LOAD( "bd1_11.8m", 0x08000, 0x4000, CRC(3076af9c) SHA1(57ce09b298fd0bae94e4d8c817a34ce812c3ddfc) )
	ROM_LOAD( "bd1_12.8n", 0x0c000, 0x4000, CRC(8b4c09a3) SHA1(46e0ef39cb313c6780f6137769153dc4a054c77f) )

	ROM_REGION( 0x1000, "proms", 0 )
	ROM_LOAD( "bd1-1.1n", 0x0000, 0x0800, CRC(0d78ebc6) SHA1(0a0c1e23eb4d1748c4e6c448284d785286c77911) )    /* Blue + Green palette (prom type mb7138e) */
	ROM_LOAD( "bd1-2.2m", 0x0800, 0x0800, CRC(03f7241f) SHA1(16ae059f084ba0ac4ddaa95dbeed113295f106ea) )    /* Red palette (prom type mb7128e) */
ROM_END

ROM_START( metrocrs )
	ROM_REGION( 0x10000, "maincpu", 0 ) /* 6809 code */
	ROM_LOAD( "mc1-3.9c",   0x6000, 0x02000, CRC(3390b33c) SHA1(0733aece368acc913e2ff32e8817194cb4b630fb) )
	ROM_LOAD( "mc1-1.9a",   0x8000, 0x04000, CRC(10b0977e) SHA1(6266d173b55075da1f252092bf38185880bc4969) )
	ROM_LOAD( "mc1-2.9b",   0xc000, 0x04000, CRC(5c846f35) SHA1(3c98a0f1131f2e2477fc75a588123c57ff5350ad) )

	ROM_REGION(  0x10000 , "mcu", 0 ) /* MCU code */
	ROM_LOAD( "mc1-4.3b",       0x8000, 0x2000, CRC(9c88f898) SHA1(d6d0345002b70c5aca41c664f34181715cd87669) )  /* subprogram for the MCU */
	ROM_LOAD( "cus60-60a1.mcu", 0xf000, 0x1000, CRC(076ea82a) SHA1(22b5e62e26390d7d5cacc0503c7aa5ed524204df) )  /* MCU internal code */

	ROM_REGION( 0x02000, "gfx1", 0 )
	ROM_LOAD( "mc1-5.3j",   0x00000, 0x2000, CRC(9b5ea33a) SHA1(a8108e71e3440b645ebdb5cdbd87712151299789) ) /* characters */

	ROM_REGION( 0x10000, "gfx2", 0 )
	ROM_LOAD( "mc1-7.4p",   0x00000, 0x4000, CRC(c9dfa003) SHA1(86e8f9fc25de67691ce5385d93b723e7eb836b2b) ) /* tiles */
	ROM_LOAD( "mc1-6.4n",   0x04000, 0x4000, CRC(9686dc3c) SHA1(1caf712eedb1f70559169685e5421e11866e518c) )
	ROM_FILL(               0x08000, 0x4000, 0xff )
	/* 0xc000-0xffff  will be unpacked from 0x8000-0xbfff */

	ROM_REGION( 0x08000, "gfx3", 0 )
	ROM_LOAD( "mc1-8.8k",   0x00000, 0x4000, CRC(265b31fa) SHA1(d46e6db5d6f325954d2b6159157b11e10fe5838d) ) /* sprites */
	ROM_LOAD( "mc1-9.8l",   0x04000, 0x4000, CRC(541ec029) SHA1(a3096d8405b6bbc862b03773889f6cbd43739f5b) )

	ROM_REGION( 0x1000, "proms", 0 )
	ROM_LOAD( "mc1-1.1n",   0x0000, 0x0800, CRC(32a78a8b) SHA1(545a59bc3c5868ac1749d2947210110205fb3da2) )  /* Blue + Green palette */
	ROM_LOAD( "mc1-2.2m",   0x0800, 0x0800, CRC(6f4dca7b) SHA1(781134c02853aded2cba63719c0e4c78b227da1c) )  /* Red palette */
ROM_END

ROM_START( metrocrsa )
	ROM_REGION( 0x10000, "maincpu", 0 ) /* 6809 code */
	ROM_LOAD( "mc2-3.9b",   0x6000, 0x02000, CRC(ffe08075) SHA1(4e1341d5a9a58f171e1e6f9aa18092d5557a6947) )
	ROM_LOAD( "mc2-1.9a",   0x8000, 0x04000, CRC(05a239ea) SHA1(3e7c7d305d0f48e2431d60b176a0cb451ddc4637) )
	ROM_LOAD( "mc2-2.9a",   0xc000, 0x04000, CRC(db9b0e6d) SHA1(2772b59fe7dc0e78ee29dd001a6bba75b94e0334) )

	ROM_REGION(  0x10000 , "mcu", 0 ) /* MCU code */
	ROM_LOAD( "mc1-4.3b",       0x8000, 0x2000, CRC(9c88f898) SHA1(d6d0345002b70c5aca41c664f34181715cd87669) )  /* subprogram for the MCU */
	ROM_LOAD( "cus60-60a1.mcu", 0xf000, 0x1000, CRC(076ea82a) SHA1(22b5e62e26390d7d5cacc0503c7aa5ed524204df) )  /* MCU internal code */

	ROM_REGION( 0x02000, "gfx1", 0 )
	ROM_LOAD( "mc1-5.3j",   0x00000, 0x2000, CRC(9b5ea33a) SHA1(a8108e71e3440b645ebdb5cdbd87712151299789) ) /* characters */

	ROM_REGION( 0x10000, "gfx2", 0 )
	ROM_LOAD( "mc1-7.4p",   0x00000, 0x4000, CRC(c9dfa003) SHA1(86e8f9fc25de67691ce5385d93b723e7eb836b2b) ) /* tiles */
	ROM_LOAD( "mc1-6.4n",   0x04000, 0x4000, CRC(9686dc3c) SHA1(1caf712eedb1f70559169685e5421e11866e518c) )
	ROM_FILL(               0x08000, 0x4000, 0xff )
	/* 0xc000-0xffff  will be unpacked from 0x8000-0xbfff */

	ROM_REGION( 0x08000, "gfx3", 0 )
	ROM_LOAD( "mc1-8.8k",   0x00000, 0x4000, CRC(265b31fa) SHA1(d46e6db5d6f325954d2b6159157b11e10fe5838d) ) /* sprites */
	ROM_LOAD( "mc1-9.8l",   0x04000, 0x4000, CRC(541ec029) SHA1(a3096d8405b6bbc862b03773889f6cbd43739f5b) )

	ROM_REGION( 0x1000, "proms", 0 )
	ROM_LOAD( "mc1-1.1n",   0x0000, 0x0800, CRC(32a78a8b) SHA1(545a59bc3c5868ac1749d2947210110205fb3da2) )  /* Blue + Green palette */
	ROM_LOAD( "mc1-2.2m",   0x0800, 0x0800, CRC(6f4dca7b) SHA1(781134c02853aded2cba63719c0e4c78b227da1c) )  /* Red palette */
ROM_END


void baraduke_state::init_baraduke()
{
	/* unpack the third tile ROM */
	uint8_t *rom = memregion("gfx2")->base() + 0x8000;
	for (int i = 0x2000; i < 0x4000; i++)
	{
		rom[i + 0x2000] = rom[i];
		rom[i + 0x4000] = rom[i] << 4;
	}
	for (int i = 0; i < 0x2000; i++)
	{
		rom[i + 0x2000] = rom[i] << 4;
	}
}



GAME( 1985, metrocrs,  0,        baraduke, metrocrs, baraduke_state, init_baraduke, ROT0, "Namco", "Metro-Cross (set 1)", 0 )
GAME( 1985, metrocrsa, metrocrs, baraduke, metrocrs, baraduke_state, init_baraduke, ROT0, "Namco", "Metro-Cross (set 2)", 0 )
GAME( 1985, aliensec,  0,        baraduke, baraduke, baraduke_state, init_baraduke, ROT0, "Namco", "Alien Sector", 0 )
GAME( 1985, baraduke,  aliensec, baraduke, baraduke, baraduke_state, init_baraduke, ROT0, "Namco", "Baraduke", 0 )