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

    Gangbusters (GX878) (c) 1988 Konami

    Preliminary driver by:
        Manuel Abadia <manu@teleline.es>

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "cpu/konami/konami.h" /* for the callback and the firq irq definition */
#include "video/konicdev.h"
#include "sound/2151intf.h"
#include "sound/k007232.h"
#include "includes/konamipt.h"
#include "includes/gbusters.h"

/* prototypes */
static KONAMI_SETLINES_CALLBACK( gbusters_banking );

static INTERRUPT_GEN( gbusters_interrupt )
{
	gbusters_state *state = (gbusters_state *)device->machine->driver_data;

	if (k052109_is_irq_enabled(state->k052109))
		cpu_set_input_line(device, KONAMI_IRQ_LINE, HOLD_LINE);
}

static READ8_HANDLER( bankedram_r )
{
	gbusters_state *state = (gbusters_state *)space->machine->driver_data;

	if (state->palette_selected)
		return space->machine->generic.paletteram.u8[offset];
	else
		return state->ram[offset];
}

static WRITE8_HANDLER( bankedram_w )
{
	gbusters_state *state = (gbusters_state *)space->machine->driver_data;

	if (state->palette_selected)
		paletteram_xBBBBBGGGGGRRRRR_be_w(space, offset, data);
	else
		state->ram[offset] = data;
}

static WRITE8_HANDLER( gbusters_1f98_w )
{
	gbusters_state *state = (gbusters_state *)space->machine->driver_data;

	/* bit 0 = enable char ROM reading through the video RAM */
	k052109_set_rmrd_line(state->k052109, (data & 0x01) ? ASSERT_LINE : CLEAR_LINE);

	/* bit 7 used (during gfx rom tests), but unknown */

	/* other bits unused/unknown */
	if (data & 0xfe)
	{
		//logerror("%04x: (1f98) write %02x\n",cpu_get_pc(space->cpu), data);
		//popmessage("$1f98 = %02x", data);
	}
}

static WRITE8_HANDLER( gbusters_coin_counter_w )
{
	gbusters_state *state = (gbusters_state *)space->machine->driver_data;

	/* bit 0 select palette RAM  or work RAM at 5800-5fff */
	state->palette_selected = ~data & 0x01;

	/* bits 1 & 2 = coin counters */
	coin_counter_w(space->machine, 0, data & 0x02);
	coin_counter_w(space->machine, 1, data & 0x04);

	/* bits 3 selects tilemap priority */
	state->priority = data & 0x08;

	/* bit 7 is used but unknown */

	/* other bits unused/unknown */
	if (data & 0xf8)
	{
#if 0
		char baf[40];
		sprintf(baf, "ccnt = %02x", data);
		popmessage(baf);
#endif
		logerror("%04x: (ccount) write %02x\n", cpu_get_pc(space->cpu), data);
	}
}

static WRITE8_HANDLER( gbusters_unknown_w )
{
	logerror("%04x: write %02x to 0x1f9c\n",cpu_get_pc(space->cpu), data);

{
char baf[40];
	sprintf(baf,"??? = %02x", data);
//  popmessage(baf);
}
}

static WRITE8_HANDLER( gbusters_sh_irqtrigger_w )
{
	gbusters_state *state = (gbusters_state *)space->machine->driver_data;
	cpu_set_input_line_and_vector(state->audiocpu, 0, HOLD_LINE, 0xff);
}

static WRITE8_DEVICE_HANDLER( gbusters_snd_bankswitch_w )
{
	int bank_B = BIT(data, 2);	/* ?? */
	int bank_A = BIT(data, 0);		/* ?? */
	k007232_set_bank(device, bank_A, bank_B );

#if 0
	{
		char baf[40];
		sprintf(baf,"snd_bankswitch = %02x", data);
		popmessage(baf);
	}
#endif
}

/* special handlers to combine 052109 & 051960 */
static READ8_HANDLER( k052109_051960_r )
{
	gbusters_state *state = (gbusters_state *)space->machine->driver_data;

	if (k052109_get_rmrd_line(state->k052109) == CLEAR_LINE)
	{
		if (offset >= 0x3800 && offset < 0x3808)
			return k051937_r(state->k051960, offset - 0x3800);
		else if (offset < 0x3c00)
			return k052109_r(state->k052109, offset);
		else
			return k051960_r(state->k051960, offset - 0x3c00);
	}
	else
		return k052109_r(state->k052109, offset);
}

static WRITE8_HANDLER( k052109_051960_w )
{
	gbusters_state *state = (gbusters_state *)space->machine->driver_data;

	if (offset >= 0x3800 && offset < 0x3808)
		k051937_w(state->k051960, offset - 0x3800, data);
	else if (offset < 0x3c00)
		k052109_w(state->k052109, offset, data);
	else
		k051960_w(state->k051960, offset - 0x3c00, data);
}


static ADDRESS_MAP_START( gbusters_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x1f80, 0x1f80) AM_WRITE(gbusters_coin_counter_w)						/* coin counters */
	AM_RANGE(0x1f84, 0x1f84) AM_WRITE(soundlatch_w)									/* sound code # */
	AM_RANGE(0x1f88, 0x1f88) AM_WRITE(gbusters_sh_irqtrigger_w)						/* cause interrupt on audio CPU */
	AM_RANGE(0x1f8c, 0x1f8c) AM_WRITE(watchdog_reset_w)								/* watchdog reset */
	AM_RANGE(0x1f90, 0x1f90) AM_READ_PORT("SYSTEM")
	AM_RANGE(0x1f91, 0x1f91) AM_READ_PORT("P1")
	AM_RANGE(0x1f92, 0x1f92) AM_READ_PORT("P2")
	AM_RANGE(0x1f93, 0x1f93) AM_READ_PORT("DSW3")
	AM_RANGE(0x1f94, 0x1f94) AM_READ_PORT("DSW1")
	AM_RANGE(0x1f95, 0x1f95) AM_READ_PORT("DSW2")
	AM_RANGE(0x1f98, 0x1f98) AM_WRITE(gbusters_1f98_w)								/* enable gfx ROM read through VRAM */
	AM_RANGE(0x1f9c, 0x1f9c) AM_WRITE(gbusters_unknown_w)							/* ??? */
	AM_RANGE(0x0000, 0x3fff) AM_READWRITE(k052109_051960_r, k052109_051960_w)		/* tiles + sprites (RAM H21, G21 & H6) */
	AM_RANGE(0x4000, 0x57ff) AM_RAM													/* RAM I12 */
	AM_RANGE(0x5800, 0x5fff) AM_READWRITE(bankedram_r, bankedram_w) AM_BASE_MEMBER(gbusters_state, ram)	/* palette + work RAM (RAM D16 & C16) */
	AM_RANGE(0x6000, 0x7fff) AM_ROMBANK("bank1")											/* banked ROM */
	AM_RANGE(0x8000, 0xffff) AM_ROM													/* ROM 878n02.rom */
ADDRESS_MAP_END

static ADDRESS_MAP_START( gbusters_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM													/* ROM 878h01.rom */
	AM_RANGE(0x8000, 0x87ff) AM_RAM													/* RAM */
	AM_RANGE(0xa000, 0xa000) AM_READ(soundlatch_r)									/* soundlatch_r */
	AM_RANGE(0xb000, 0xb00d) AM_DEVREADWRITE("k007232", k007232_r, k007232_w)		/* 007232 registers */
	AM_RANGE(0xc001, 0xc001) AM_DEVREAD("ymsnd", ym2151_status_port_r)					/* YM 2151 */
	AM_RANGE(0xc000, 0xc001) AM_DEVREADWRITE("ymsnd", ym2151_r, ym2151_w)				/* YM 2151 */
	AM_RANGE(0xf000, 0xf000) AM_DEVWRITE("k007232", gbusters_snd_bankswitch_w)		/* 007232 bankswitch? */
ADDRESS_MAP_END

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

    Input Ports

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

static INPUT_PORTS_START( gbusters )
	PORT_START("DSW1")
	KONAMI_COINAGE_LOC(DEF_STR( Free_Play ), "No Coin B", SW1)
	/* "No Coin B" = coins produce sound, but no effect on coin counter */

	PORT_START("DSW2")
	PORT_DIPNAME( 0x03, 0x02, DEF_STR( Lives ) )		PORT_DIPLOCATION("SW2:1,2")
	PORT_DIPSETTING(    0x03, "2" )
	PORT_DIPSETTING(    0x02, "3" )
	PORT_DIPSETTING(    0x01, "5" )
	PORT_DIPSETTING(    0x00, "7" )
	PORT_DIPNAME( 0x04, 0x04, "Bullets" )			PORT_DIPLOCATION("SW2:3")
	PORT_DIPSETTING(    0x04, "50" )
	PORT_DIPSETTING(    0x00, "60" )
	PORT_DIPNAME( 0x18, 0x10, DEF_STR( Bonus_Life ) )	PORT_DIPLOCATION("SW2:4,5")
	PORT_DIPSETTING(    0x18, "50k, 200k, Every 400k" )
	PORT_DIPSETTING(    0x10, "70k, 250k, Every 500k" )
	PORT_DIPSETTING(    0x08, "50k Only" )
	PORT_DIPSETTING(    0x00, "70k Only" )
	PORT_DIPNAME( 0x60, 0x40, DEF_STR( Difficulty ) )	PORT_DIPLOCATION("SW2:6,7")
	PORT_DIPSETTING(    0x60, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Difficult ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Very_Difficult ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) )	PORT_DIPLOCATION("SW2:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW3")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Flip_Screen ) )	PORT_DIPLOCATION("SW3:1")
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPUNUSED_DIPLOC( 0x02, 0x02, "SW3:2" ) /* Listed as "Unused" */
	PORT_SERVICE_DIPLOC(  0x04, IP_ACTIVE_LOW, "SW3:3" )
	PORT_DIPUNUSED_DIPLOC( 0x08, 0x08, "SW3:4" ) /* Listed as "Unused" */
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("SYSTEM")
	KONAMI8_SYSTEM_UNK

	PORT_START("P1")
	KONAMI8_B12_UNK(1)

	PORT_START("P2")
	KONAMI8_B12_UNK(2)
INPUT_PORTS_END


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

    Machine Driver

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

static void volume_callback( running_device *device, int v )
{
	k007232_set_volume(device, 0, (v >> 4) * 0x11, 0);
	k007232_set_volume(device, 1, 0, (v & 0x0f) * 0x11);
}

static const k007232_interface k007232_config =
{
	volume_callback	/* external port callback */
};

static const k052109_interface gbusters_k052109_intf =
{
	"gfx1", 0,
	NORMAL_PLANE_ORDER,
	KONAMI_ROM_DEINTERLEAVE_2,
	gbusters_tile_callback
};

static const k051960_interface gbusters_k051960_intf =
{
	"gfx2", 1,
	NORMAL_PLANE_ORDER,
	KONAMI_ROM_DEINTERLEAVE_2,
	gbusters_sprite_callback
};

static MACHINE_START( gbusters )
{
	gbusters_state *state = (gbusters_state *)machine->driver_data;
	UINT8 *ROM = memory_region(machine, "maincpu");

	memory_configure_bank(machine, "bank1", 0, 16, &ROM[0x10000], 0x2000);
	memory_set_bank(machine, "bank1", 0);

	machine->generic.paletteram.u8 = auto_alloc_array_clear(machine, UINT8, 0x800);

	state->maincpu = machine->device("maincpu");
	state->audiocpu = machine->device("audiocpu");
	state->k052109 = machine->device("k052109");
	state->k051960 = machine->device("k051960");
	state->k007232 = machine->device("k007232");

	state_save_register_global(machine, state->palette_selected);
	state_save_register_global(machine, state->priority);
	state_save_register_global_pointer(machine, machine->generic.paletteram.u8, 0x800);
}

static MACHINE_RESET( gbusters )
{
	gbusters_state *state = (gbusters_state *)machine->driver_data;
	UINT8 *RAM = memory_region(machine, "maincpu");

	konami_configure_set_lines(machine->device("maincpu"), gbusters_banking);

	/* mirror address for banked ROM */
	memcpy(&RAM[0x18000], &RAM[0x10000], 0x08000);

	state->palette_selected = 0;
	state->priority = 0;
}

static MACHINE_DRIVER_START( gbusters )

	/* driver data */
	MDRV_DRIVER_DATA(gbusters_state)

	/* basic machine hardware */
	MDRV_CPU_ADD("maincpu", KONAMI, 3000000)	/* Konami custom 052526 */
	MDRV_CPU_PROGRAM_MAP(gbusters_map)
	MDRV_CPU_VBLANK_INT("screen", gbusters_interrupt)

	MDRV_CPU_ADD("audiocpu", Z80, 3579545)		/* ? */
	MDRV_CPU_PROGRAM_MAP(gbusters_sound_map)

	MDRV_MACHINE_START(gbusters)
	MDRV_MACHINE_RESET(gbusters)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_HAS_SHADOWS)

	MDRV_SCREEN_ADD("screen", RASTER)
	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(64*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(14*8, (64-14)*8-1, 2*8, 30*8-1 )

	MDRV_PALETTE_LENGTH(1024)

	MDRV_VIDEO_START(gbusters)
	MDRV_VIDEO_UPDATE(gbusters)

	MDRV_K052109_ADD("k052109", gbusters_k052109_intf)
	MDRV_K051960_ADD("k051960", gbusters_k051960_intf)

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

	MDRV_SOUND_ADD("ymsnd", YM2151, 3579545)
	MDRV_SOUND_ROUTE(0, "mono", 0.60)
	MDRV_SOUND_ROUTE(1, "mono", 0.60)

	MDRV_SOUND_ADD("k007232", K007232, 3579545)
	MDRV_SOUND_CONFIG(k007232_config)
	MDRV_SOUND_ROUTE(0, "mono", 0.30)
	MDRV_SOUND_ROUTE(1, "mono", 0.30)
MACHINE_DRIVER_END


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

  Game ROMs

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

ROM_START( gbusters )
	ROM_REGION( 0x30000, "maincpu", 0 ) /* code + banked roms + space for banked RAM */
	ROM_LOAD( "878n02.k13", 0x10000, 0x08000, CRC(51697aaa) SHA1(1e6461e2e5e871d44085623a890158a4c1c4c404) )
	ROM_CONTINUE(           0x08000, 0x08000 )
	ROM_LOAD( "878j03.k15", 0x20000, 0x10000, CRC(3943a065) SHA1(6b0863f4182e6c973adfaa618f096bd4cc9b7b6d) )

	ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for the sound CPU */
	ROM_LOAD( "878h01.f8", 0x00000, 0x08000, CRC(96feafaa) SHA1(8b6547e610cb4fa1c1f5bf12cb05e9a12a353903) )

	ROM_REGION( 0x80000, "gfx1", 0 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD( "878c07.h27", 0x00000, 0x40000, CRC(eeed912c) SHA1(b2e27610b38f3fc9c2cdad600b03c8bae4fb9138) ) /* tiles */
	ROM_LOAD( "878c08.k27", 0x40000, 0x40000, CRC(4d14626d) SHA1(226b1d83fb82586302be0a67737a427475856537) ) /* tiles */

	ROM_REGION( 0x80000, "gfx2", 0 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD( "878c05.h5", 0x00000, 0x40000, CRC(01f4aea5) SHA1(124123823be6bd597805484539d821aaaadde2c0) ) /* sprites */
	ROM_LOAD( "878c06.k5", 0x40000, 0x40000, CRC(edfaaaaf) SHA1(67468c4ce47e8d43d58de8d3b50b048c66508156) ) /* sprites */

	ROM_REGION( 0x0100, "proms", 0 )
	ROM_LOAD( "878a09.f20",   0x0000, 0x0100, CRC(e2d09a1b) SHA1(a9651e137486b2df367c39eb43f52d0833589e87) ) /* priority encoder (not used) */

	ROM_REGION( 0x40000, "k007232", 0 ) /* samples for 007232 */
	ROM_LOAD( "878c04.d5",  0x00000, 0x40000, CRC(9e982d1c) SHA1(a5b611c67b0f2ac50c679707931ee12ebbf72ebe) )
ROM_END

ROM_START( gbustersa )
	ROM_REGION( 0x30000, "maincpu", 0 ) /* code + banked roms + space for banked RAM */
	ROM_LOAD( "878_02.k13", 0x10000, 0x08000, CRC(57178414) SHA1(89b1403158f6ce18706c8a941109554d03cf77d9) ) /* unknown region/version leter */
	ROM_CONTINUE(           0x08000, 0x08000 )
	ROM_LOAD( "878_03.k15", 0x20000, 0x10000, CRC(6c59e660) SHA1(66a92eb8a93c9f542489fa31bec6ed1819d174da) ) /* unknown region/version leter */

	ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for the sound CPU */
	ROM_LOAD( "878h01.f8", 0x00000, 0x08000, CRC(96feafaa) SHA1(8b6547e610cb4fa1c1f5bf12cb05e9a12a353903) )

	ROM_REGION( 0x80000, "gfx1", 0 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD( "878c07.h27", 0x00000, 0x40000, CRC(eeed912c) SHA1(b2e27610b38f3fc9c2cdad600b03c8bae4fb9138) ) /* tiles */
	ROM_LOAD( "878c08.k27", 0x40000, 0x40000, CRC(4d14626d) SHA1(226b1d83fb82586302be0a67737a427475856537) ) /* tiles */

	ROM_REGION( 0x80000, "gfx2", 0 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD( "878c05.h5", 0x00000, 0x40000, CRC(01f4aea5) SHA1(124123823be6bd597805484539d821aaaadde2c0) ) /* sprites */
	ROM_LOAD( "878c06.k5", 0x40000, 0x40000, CRC(edfaaaaf) SHA1(67468c4ce47e8d43d58de8d3b50b048c66508156) ) /* sprites */

	ROM_REGION( 0x0100, "proms", 0 )
	ROM_LOAD( "878a09.f20",   0x0000, 0x0100, CRC(e2d09a1b) SHA1(a9651e137486b2df367c39eb43f52d0833589e87) ) /* priority encoder (not used) */

	ROM_REGION( 0x40000, "k007232", 0 ) /* samples for 007232 */
	ROM_LOAD( "878c04.d5",  0x00000, 0x40000, CRC(9e982d1c) SHA1(a5b611c67b0f2ac50c679707931ee12ebbf72ebe) )
ROM_END

ROM_START( crazycop )
	ROM_REGION( 0x30000, "maincpu", 0 ) /* code + banked roms + space for banked RAM */
	ROM_LOAD( "878m02.k13", 0x10000, 0x08000, CRC(9c1c9f52) SHA1(7a60ad20aac92da8258b43b04f8c7f27bb71f1df) )
	ROM_CONTINUE(           0x08000, 0x08000 )
	ROM_LOAD( "878j03.k15", 0x20000, 0x10000, CRC(3943a065) SHA1(6b0863f4182e6c973adfaa618f096bd4cc9b7b6d) )

	ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for the sound CPU */
	ROM_LOAD( "878h01.f8", 0x00000, 0x08000, CRC(96feafaa) SHA1(8b6547e610cb4fa1c1f5bf12cb05e9a12a353903) )

	ROM_REGION( 0x80000, "gfx1", 0 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD( "878c07.h27", 0x00000, 0x40000, CRC(eeed912c) SHA1(b2e27610b38f3fc9c2cdad600b03c8bae4fb9138) ) /* tiles */
	ROM_LOAD( "878c08.k27", 0x40000, 0x40000, CRC(4d14626d) SHA1(226b1d83fb82586302be0a67737a427475856537) ) /* tiles */

	ROM_REGION( 0x80000, "gfx2", 0 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD( "878c05.h5", 0x00000, 0x40000, CRC(01f4aea5) SHA1(124123823be6bd597805484539d821aaaadde2c0) )	/* sprites */
	ROM_LOAD( "878c06.k5", 0x40000, 0x40000, CRC(edfaaaaf) SHA1(67468c4ce47e8d43d58de8d3b50b048c66508156) )	/* sprites */

	ROM_REGION( 0x0100, "proms", 0 )
	ROM_LOAD( "878a09.f20",   0x0000, 0x0100, CRC(e2d09a1b) SHA1(a9651e137486b2df367c39eb43f52d0833589e87) ) /* priority encoder (not used) */

	ROM_REGION( 0x40000, "k007232", 0 ) /* samples for 007232 */
	ROM_LOAD( "878c04.d5",  0x00000, 0x40000, CRC(9e982d1c) SHA1(a5b611c67b0f2ac50c679707931ee12ebbf72ebe) )
ROM_END


static KONAMI_SETLINES_CALLBACK( gbusters_banking )
{
	/* bits 0-3 ROM bank */
	memory_set_bank(device->machine,  "bank1", lines & 0x0f);

	if (lines & 0xf0)
	{
		//logerror("%04x: (lines) write %02x\n",cpu_get_pc(device), lines);
		//popmessage("lines = %02x", lines);
	}

	/* other bits unknown */
}


GAME( 1988, gbusters,  0,        gbusters, gbusters, 0, ROT90, "Konami", "Gang Busters (set 1)", GAME_SUPPORTS_SAVE ) /* N02 & J03 program roms */
GAME( 1988, gbustersa, gbusters, gbusters, gbusters, 0, ROT90, "Konami", "Gang Busters (set 2)", GAME_SUPPORTS_SAVE ) /* unknown region program roms */
GAME( 1988, crazycop,  gbusters, gbusters, gbusters, 0, ROT90, "Konami", "Crazy Cop (Japan)", GAME_SUPPORTS_SAVE )    /* M02 & J03 program roms */
