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

	Battle Rangers					(c) 1988 Data East Corporation
	Bloody Wolf						(c) 1988 Data East USA

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

	This board is a modified PC-Engine PCB, differences from PC-Engine console:

	Input ports are different (2 dips, 2 joysticks, 1 coin port)
	_Interface_ to palette chip is different, palette data is the same.
	Extra sound chips, and extra processor to drive them.
	Twice as much VRAM.

	Todo:
	- Priority is wrong for the submarine at the end of level 1.
	- There seems to be a bug with a stuck note from the YM2203 FM channel
	  at the start of scene 3 and near the ending when your characters are
	  flying over a forest in a helicopter.

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

#include "driver.h"
#include "vidhrdw/generic.h"
#include "cpu/h6280/h6280.h"

VIDEO_UPDATE( battlera );
VIDEO_START( battlera );
INTERRUPT_GEN( battlera_interrupt );

READ_HANDLER( HuC6270_register_r );
WRITE_HANDLER( HuC6270_register_w );
READ_HANDLER( HuC6270_data_r );
WRITE_HANDLER( HuC6270_data_w );
WRITE_HANDLER( battlera_palette_w );

READ_HANDLER( HuC6270_debug_r );
WRITE_HANDLER( HuC6270_debug_w );

static int control_port_select;

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

static WRITE_HANDLER( battlera_sound_w )
{
	if (offset==0) {
		soundlatch_w(0,data);
		cpu_set_irq_line(1, 0, HOLD_LINE);
	}
}

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

static WRITE_HANDLER( control_data_w )
{
	control_port_select=data;
}

static READ_HANDLER( control_data_r )
{
	switch (control_port_select) {
		case 0xfe: return readinputport(0); /* Player 1 */
		case 0xfd: return readinputport(1); /* Player 2 */
		case 0xfb: return readinputport(2); /* Coins */
		case 0xf7: return readinputport(4); /* Dip 2 */
		case 0xef: return readinputport(3); /* Dip 1 */
	}

    return 0xff;
}

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

static MEMORY_READ_START( battlera_readmem )
	{ 0x000000, 0x0fffff, MRA_ROM },
	{ 0x100000, 0x10ffff, HuC6270_debug_r }, /* Cheat to view vram data */
	{ 0x1f0000, 0x1f1fff, MRA_BANK8 },
	{ 0x1fe000, 0x1fe001, HuC6270_register_r },
	{ 0x1ff000, 0x1ff001, control_data_r },
MEMORY_END

static MEMORY_WRITE_START( battlera_writemem )
	{ 0x000000, 0x0fffff, MWA_ROM },
	{ 0x100000, 0x10ffff, HuC6270_debug_w }, /* Cheat to edit vram data */
	{ 0x1e0800, 0x1e0801, battlera_sound_w },
	{ 0x1e1000, 0x1e13ff, battlera_palette_w, &paletteram },
	{ 0x1f0000, 0x1f1fff, MWA_BANK8 }, /* Main ram */
	{ 0x1fe000, 0x1fe001, HuC6270_register_w },
	{ 0x1fe002, 0x1fe003, HuC6270_data_w },
	{ 0x1ff000, 0x1ff001, control_data_w },
	{ 0x1ff402, 0x1ff403, H6280_irq_status_w },
MEMORY_END

static PORT_WRITE_START( battlera_portwrite )
	{ 0x00, 0x01, HuC6270_register_w },
	{ 0x02, 0x03, HuC6270_data_w },
PORT_END

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

static WRITE_HANDLER( YM2203_w )
{
	switch (offset) {
	case 0: YM2203_control_port_0_w(0,data); break;
	case 1: YM2203_write_port_0_w(0,data); break;
	}
}

static int msm5205next;

static void battlera_adpcm_int(int data)
{
	static int toggle;

	MSM5205_data_w(0,msm5205next >> 4);
	msm5205next<<=4;

	toggle = 1 - toggle;
	if (toggle)
		cpu_set_irq_line(1, 1, HOLD_LINE);
}

static WRITE_HANDLER( battlera_adpcm_data_w )
{
	msm5205next=data;
}

static WRITE_HANDLER( battlera_adpcm_reset_w )
{
	MSM5205_reset_w(0,0);
}

static MEMORY_READ_START( sound_readmem )
	{ 0x000000, 0x00ffff, MRA_ROM },
	{ 0x1f0000, 0x1f1fff, MRA_BANK7 }, /* Main ram */
	{ 0x1ff000, 0x1ff001, soundlatch_r },
MEMORY_END

static MEMORY_WRITE_START( sound_writemem )
 	{ 0x000000, 0x00ffff, MWA_ROM },
	{ 0x040000, 0x040001, YM2203_w },
	{ 0x080000, 0x080001, battlera_adpcm_data_w },
	{ 0x1fe800, 0x1fe80f, C6280_0_w },
	{ 0x1f0000, 0x1f1fff, MWA_BANK7 }, /* Main ram */
	{ 0x1ff000, 0x1ff001, battlera_adpcm_reset_w },
	{ 0x1ff402, 0x1ff403, H6280_irq_status_w },
MEMORY_END

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

INPUT_PORTS_START( battlera )
	PORT_START  /* Player 1 controls */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER1 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START1 )

	PORT_START  /* Player 2 controls */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER2 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_PLAYER2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER2 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 )

	PORT_START	/* Coins */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN3 )
	PORT_BIT( 0xf8, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START	/* Dip switch bank 1 */
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_A ) )
	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_DIPNAME( 0x0c, 0x0c, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_2C ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START	/* Dip switch bank 2 */
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x01, "1" )
	PORT_DIPSETTING(    0x02, "2" )
	PORT_DIPSETTING(    0x03, "3" )
	PORT_BITX( 0,       0x00, IPT_DIPSWITCH_SETTING | IPF_CHEAT, "Infinite", IP_KEY_NONE, IP_JOY_NONE )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x08, "Easy" )
	PORT_DIPSETTING(    0x0c, "Normal" )
	PORT_DIPSETTING(    0x04, "Hard" )
	PORT_DIPSETTING(    0x00, "Very Hard" )
	PORT_DIPNAME( 0x10, 0x10, "Allow Continue" )
	PORT_DIPSETTING(    0x00, DEF_STR( No ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END

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

static struct GfxLayout tiles =
{
	8,8,
	4096,
	4,
	{ 16*8, 16*8+8, 0, 8 },
	{ 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 },
	32*8
};

static struct GfxLayout sprites =
{
	16,16,
	1024,
	4,
	{ 96*8, 64*8, 32*8, 0 },
	{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
	{ 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 },
	128*8
};

static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &tiles,       0,  16 }, /* Dynamically modified */
	{ REGION_GFX1, 0, &sprites,   256,  16 }, /* Dynamically modified */
	{ REGION_GFX1, 0, &tiles  ,   256,  16 }, /* Blank tile */
	{ -1 } /* end of array */
};

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

static struct YM2203interface ym2203_interface =
{
	1,
	12000000/8, /* 1.5 MHz */
	{ YM2203_VOL(100,100) },
	{ 0 },
	{ 0 },
	{ 0 },
	{ 0 },
	{ 0 },
};

static struct C6280_interface c6280_interface =
{
	1,		/* 1 chip */
	{ 80 },		/* Volume */
	{ 21477270/6 }	/* 3.579545 MHz */
};

static struct MSM5205interface msm5205_interface =
{
	1,					/* 1 chip			 */
	384000,				/* 384KHz			 */
	{ battlera_adpcm_int },/* interrupt function */
	{ MSM5205_S48_4B},	/* 8KHz			   */
	{ 85 }
};

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

static MACHINE_DRIVER_START( battlera )

	/* basic machine hardware */
	MDRV_CPU_ADD(H6280,21477200/3)
	MDRV_CPU_MEMORY(battlera_readmem,battlera_writemem)
	MDRV_CPU_PORTS(0,battlera_portwrite)
	MDRV_CPU_VBLANK_INT(battlera_interrupt,256) /* 8 prelines, 232 lines, 16 vblank? */

	MDRV_CPU_ADD(H6280,21477200/3)
	MDRV_CPU_FLAGS(CPU_AUDIO_CPU)
	MDRV_CPU_MEMORY(sound_readmem,sound_writemem)

	MDRV_FRAMES_PER_SECOND(60)
	MDRV_VBLANK_DURATION(DEFAULT_REAL_60HZ_VBLANK_DURATION)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 1*8, 30*8-1)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(512)

	MDRV_VIDEO_START(battlera)
	MDRV_VIDEO_UPDATE(battlera)

	/* sound hardware */
	MDRV_SOUND_ATTRIBUTES(SOUND_SUPPORTS_STEREO)
	MDRV_SOUND_ADD(YM2203, ym2203_interface)
	MDRV_SOUND_ADD(MSM5205, msm5205_interface)
	MDRV_SOUND_ADD(C6280, c6280_interface)
MACHINE_DRIVER_END

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

ROM_START( battlera )
	ROM_REGION( 0x100000, REGION_CPU1, 0 ) /* Main cpu code */
	ROM_LOAD( "00_e1.bin", 0x00000, 0x10000, 0xaa1cbe69 ) /* ET00 */
	ROM_LOAD( "es01.rom",  0x10000, 0x10000, 0x9fea3189 ) /* ET01 */
	ROM_LOAD( "02_e4.bin", 0x20000, 0x10000, 0xcd72f580 ) /* ET02, etc */
	/* Rom sockets 0x30000 - 0x70000 are unused */
	ROM_LOAD( "es05.rom",  0x80000, 0x10000, 0x551fa331 )
	ROM_LOAD( "es06.rom",  0x90000, 0x10000, 0xab91aac8 )
	ROM_LOAD( "es07.rom",  0xa0000, 0x10000, 0x8d15a3d0 )
	ROM_LOAD( "es08.rom",  0xb0000, 0x10000, 0x38f06039 )
	ROM_LOAD( "es09.rom",  0xc0000, 0x10000, 0xb718c47d )
	ROM_LOAD( "es10-1.rom",0xd0000, 0x10000, 0xd3cddc02 )
	/* Rom sockets 0xe0000 - 0x100000 are unused */

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* Sound CPU */
	ROM_LOAD( "es11.rom",  0x00000, 0x10000, 0xf5b29c9c )

	ROM_REGION( 0x80000, REGION_GFX1, 0 )
	/* Nothing */
ROM_END

ROM_START( bldwolf )
	ROM_REGION( 0x100000, REGION_CPU1, 0 ) /* Main cpu code */
	ROM_LOAD( "es00-1.rom", 0x00000, 0x10000, 0xff4aa252 )
	ROM_LOAD( "es01.rom",   0x10000, 0x10000, 0x9fea3189 )
	ROM_LOAD( "es02-1.rom", 0x20000, 0x10000, 0x49792753 )
	/* Rom sockets 0x30000 - 0x70000 are unused */
	ROM_LOAD( "es05.rom",   0x80000, 0x10000, 0x551fa331 )
	ROM_LOAD( "es06.rom",   0x90000, 0x10000, 0xab91aac8 )
	ROM_LOAD( "es07.rom",   0xa0000, 0x10000, 0x8d15a3d0 )
	ROM_LOAD( "es08.rom",   0xb0000, 0x10000, 0x38f06039 )
	ROM_LOAD( "es09.rom",   0xc0000, 0x10000, 0xb718c47d )
	ROM_LOAD( "es10-1.rom", 0xd0000, 0x10000, 0xd3cddc02 )
	/* Rom sockets 0xe0000 - 0x100000 are unused */

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* Sound CPU */
	ROM_LOAD( "es11.rom",   0x00000, 0x10000, 0xf5b29c9c )

	ROM_REGION( 0x80000, REGION_GFX1, 0 )
	/* Nothing */
ROM_END

ROM_START( bldwolfj ) /* note, rom codes are ER not ES even if the content of some roms is identical */
	ROM_REGION( 0x100000, REGION_CPU1, 0 ) /* Main cpu code */
	ROM_LOAD( "er00-.0-0", 0x00000, 0x10000, 0x3819a14e )
	ROM_LOAD( "er01-.0-1", 0x10000, 0x10000, 0x763cf206 )
	ROM_LOAD( "er02-.0-2", 0x20000, 0x10000, 0xbcad8a0f )
	/* Rom sockets 0x30000 - 0x70000 are unused */
	ROM_LOAD( "er05-.1-0", 0x80000, 0x10000, 0x551fa331 )
	ROM_LOAD( "er06-.1-1", 0x90000, 0x10000, 0xab91aac8 )
	ROM_LOAD( "er07-.1-2", 0xa0000, 0x10000, 0x8d15a3d0 )
	ROM_LOAD( "er08-.1-3", 0xb0000, 0x10000, 0x38f06039 )
	ROM_LOAD( "er09-.1-4", 0xc0000, 0x10000, 0xb718c47d )
	ROM_LOAD( "er10-.1-5", 0xd0000, 0x10000, 0xd3cddc02 )
	/* Rom sockets 0xe0000 - 0x100000 are unused */

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* Sound CPU */
	ROM_LOAD( "er11-.tpg",   0x00000, 0x10000, 0xf5b29c9c )

	ROM_REGION( 0x80000, REGION_GFX1, 0 )
	/* Nothing */
ROM_END

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

GAMEX( 1988, battlera, 0,        battlera, battlera,  0,   ROT0, "Data East Corporation", "Battle Rangers (World)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS )
GAMEX( 1988, bldwolf,  battlera, battlera, battlera,  0,   ROT0, "Data East USA", "Bloody Wolf (US)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS )
GAMEX( 1988, bldwolfj, battlera, battlera, battlera,  0,   ROT0, "Data East Corporation", "Narazumono Sentoubutai Bloody Wolf (Japan)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS )
