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

Block Hole (GX973) (c) 1989 Konami

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

#include "driver.h"
#include "vidhrdw/generic.h"
#include "cpu/konami/konami.h" /* for the callback and the firq irq definition */
#include "vidhrdw/konamiic.h"

/* prototypes */
static void blockhl_init_machine( void );
static void blockhl_banking( int lines );


void blockhl_vh_stop( void );
int blockhl_vh_start( void );
void blockhl_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);

static int palette_selected;
static unsigned char *ram;

static int blockhl_interrupt( void )
{
	if (K052109_is_IRQ_enabled())
		return KONAMI_INT_IRQ;
	else
		return ignore_interrupt();
}

static int bankedram_r(int offset)
{
	if (palette_selected)
		return paletteram_r(offset);
	else
		return ram[offset];
}

static void bankedram_w(int offset,int data)
{
	if (palette_selected)
		paletteram_xBBBBBGGGGGRRRRR_swap_w(offset,data);
	else
		ram[offset] = data;
}

void blockhl_sh_irqtrigger_w(int offset, int data)
{
	cpu_cause_interrupt(1,0xff);
}



static struct MemoryReadAddress readmem[] =
{
	{ 0x1f94, 0x1f94, input_port_4_r },
	{ 0x1f95, 0x1f95, input_port_0_r },
	{ 0x1f96, 0x1f96, input_port_1_r },
	{ 0x1f97, 0x1f97, input_port_2_r },
	{ 0x1f98, 0x1f98, input_port_3_r },
	{ 0x0000, 0x3fff, K052109_051960_r },
	{ 0x4000, 0x57ff, MRA_RAM },
	{ 0x5800, 0x5fff, bankedram_r },
	{ 0x6000, 0x7fff, MRA_BANK1 },
	{ 0x8000, 0xffff, MRA_ROM },
	{ -1 }	/* end of table */
};

static struct MemoryWriteAddress writemem[] =
{
	{ 0x1f84, 0x1f84, soundlatch_w },
	{ 0x1f88, 0x1f88, blockhl_sh_irqtrigger_w },
	{ 0x1f8c, 0x1f8c, watchdog_reset_w },
	{ 0x0000, 0x3fff, K052109_051960_w },
	{ 0x4000, 0x57ff, MWA_RAM },
	{ 0x5800, 0x5fff, bankedram_w, &ram },
	{ 0x6000, 0x7fff, MWA_ROM },
	{ 0x8000, 0xffff, MWA_ROM },
	{ -1 }	/* end of table */
};

static struct MemoryReadAddress sound_readmem[] =
{
	{ 0x0000, 0x7fff, MRA_ROM },
	{ 0x8000, 0x87ff, MRA_RAM },
	{ 0xa000, 0xa000, soundlatch_r },
	{ 0xc001, 0xc001, YM2151_status_port_0_r },
	{ -1 }	/* end of table */
};

static struct MemoryWriteAddress sound_writemem[] =
{
	{ 0x0000, 0x7fff, MWA_ROM },
	{ 0x8000, 0x87ff, MWA_RAM },
	{ 0xc000, 0xc000, YM2151_register_port_0_w },
	{ 0xc001, 0xc001, YM2151_data_port_0_w },
	{ 0xe00c, 0xe00d, MWA_NOP },		/* leftover from missing 007232? */
	{ -1 }	/* end of table */
};

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

	Input Ports

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

INPUT_PORTS_START( input_ports )
	PORT_START	/* PLAYER 1 INPUTS */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER1 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | 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 INPUTS */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_PLAYER2 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_PLAYER2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | 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	/* DSW #1 */
	PORT_DIPNAME( 0x0f, 0x0f, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 4C_3C ) )
	PORT_DIPSETTING(    0x0f, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 3C_4C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x0e, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 2C_5C ) )
	PORT_DIPSETTING(    0x0d, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x0b, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x09, DEF_STR( 1C_7C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0xf0, 0xf0, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x50, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 4C_3C ) )
	PORT_DIPSETTING(    0xf0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 3C_4C ) )
	PORT_DIPSETTING(    0x70, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 2C_5C ) )
	PORT_DIPSETTING(    0xd0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0xb0, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x90, DEF_STR( 1C_7C ) )
//	PORT_DIPSETTING(    0x00, "Invalid" )

	PORT_START	/* DSW #2 */
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x01, "1" )
	PORT_DIPSETTING(    0x00, "2" )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x60, 0x40, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x60, "Easy" )
	PORT_DIPSETTING(    0x40, "Normal" )
	PORT_DIPSETTING(    0x20, "Difficult" )
	PORT_DIPSETTING(    0x00, "Very Difficult" )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START	/* DSW #3 */
	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( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_SERVICE( 0x40, IP_ACTIVE_LOW )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END


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

	Machine Driver

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

static struct YM2151interface ym2151_interface =
{
	1, /* 1 chip */
	3579545, /* 3.579545 MHz */
	{ YM3012_VOL(60,MIXER_PAN_LEFT,60,MIXER_PAN_RIGHT) },
	{ 0 },
	{ 0 }
};

static struct MachineDriver machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_KONAMI,		/* Konami custom 052526 */
			3000000,		/* ? */
			0,
			readmem,writemem,0,0,
            blockhl_interrupt,1
        },
		{
			CPU_Z80 | CPU_AUDIO_CPU,
			3579545,		/* ? */
			3,
			sound_readmem,sound_writemem,0,0,
			ignore_interrupt,0	/* interrupts are triggered by the main CPU */
		}
	},
	60, DEFAULT_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,	/* 1 CPU slice per frame - interleaving is forced when a sound command is written */
	blockhl_init_machine,

	/* video hardware */
	64*8, 32*8, { 14*8, (64-14)*8-1, 2*8, 30*8-1 },
	0,	/* gfx decoded by konamiic.c */
	1024, 1024,
	0,

	VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE,
	0,
	blockhl_vh_start,
	blockhl_vh_stop,
	blockhl_vh_screenrefresh,

	/* sound hardware */
	0,0,0,0,
	{
		{
			SOUND_YM2151,
			&ym2151_interface
		}
	}
};


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

  Game ROMs

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

ROM_START( quarth_rom )
	ROM_REGION( 0x18800 ) /* code + banked roms + space for banked RAM */
	ROM_LOAD( "973j02.e21", 0x10000, 0x08000, 0x27a90118 )
	ROM_CONTINUE(           0x08000, 0x08000 )

	ROM_REGION( 0x20000 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD_GFX_EVEN( "973e07.k15", 0x00000, 0x08000, 0x0bd6b0f8 )	/* tiles */
	ROM_LOAD_GFX_ODD ( "973e08.k18", 0x00000, 0x08000, 0x104d0d5f )
	ROM_LOAD_GFX_EVEN( "973e09.k20", 0x10000, 0x08000, 0xbd3a6f24 )
	ROM_LOAD_GFX_ODD ( "973e10.k23", 0x10000, 0x08000, 0xcf5e4b86 )

	ROM_REGION( 0x20000 ) /* graphics (addressable by the main CPU) */
	ROM_LOAD_GFX_EVEN( "973e06.k12", 0x00000, 0x08000, 0x0d58af85 )	/* sprites */
	ROM_LOAD_GFX_ODD ( "973e05.k9",  0x00000, 0x08000, 0x15d822cb )
	ROM_LOAD_GFX_EVEN( "973e04.k7",  0x10000, 0x08000, 0xd70f4a2c )
	ROM_LOAD_GFX_ODD ( "973e03.k4",  0x10000, 0x08000, 0x2c5a4b4b )

	ROM_REGION( 0x10000 ) /* 64k for the sound CPU */
	ROM_LOAD( "973d01.g6",  0x0000, 0x8000, 0xeeee9d92 )

	ROM_REGION(0x0100)	/* PROMs */
	ROM_LOAD( "973a11.h10", 0x0000, 0x0100, 0x46d28fe9 )	/* priority encoder (not used) */
ROM_END

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

  Game driver(s)

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

static void blockhl_banking( int lines )
{
	unsigned char *RAM = Machine->memory_region[0];
	int offs;

	/* bits 0-1 = ROM bank */
	offs = 0x10000 + (lines & 0x03) * 0x2000;
	cpu_setbank(1,&RAM[offs]);

	/* bits 3/4 = coin counters */
	coin_counter_w(0,lines & 0x08);
	coin_counter_w(1,lines & 0x10);

	/* bit 5 = select palette RAM or work RAM at 5800-5fff */
	palette_selected = ~lines & 0x20;

	/* bit 6 = enable char ROM reading through the video RAM */
	K052109_set_RMRD_line( ( lines & 0x40 ) ? ASSERT_LINE : CLEAR_LINE );

	/* bit 7 used but unknown */

	/* other bits unknown */

if (errorlog && (lines & 0x84) != 0x80) fprintf(errorlog,"%04x: setlines %02x\n",cpu_get_pc(),lines);
}

static void blockhl_init_machine( void )
{
	unsigned char *RAM = Machine->memory_region[0];

	konami_cpu_setlines_callback = blockhl_banking;

	paletteram = &RAM[0x18000];
}


static void gfx_untangle(void)
{
	konami_rom_deinterleave_2(1);
	konami_rom_deinterleave_2(2);
}



struct GameDriver quarth_driver =
{
	__FILE__,
	0,
	"quarth",
	"Quarth (Japan)",
	"1989",
	"Konami",
	"Nicola Salmoria",
	0,
	&machine_driver,
	0,

	quarth_rom,
	gfx_untangle, 0,
	0,
	0,	/* sound_prom */

	input_ports,

	0, 0, 0,
    ORIENTATION_DEFAULT,
	0, 0
};
