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

    Sky Lancer / Mad Zoo

    Original preliminary driver by Luca Elia.
    Additional Work: Roberto Fresca & David Haywood.


**************************************************************************************************************

    Notes:

    - Some of the tiles look badly scaled down, and others appear to have columns swapped.
      This might actually be correct.

    - Skylncr and madzoo can run with the same program roms, they're basically graphics swaps.

    - To enter the Service Mode, press F2. All the game settings are there.
      Change regular values using DIP switches, and jackpot value using STOP2 and STOP3.
      To exit the mode, press START. You must reset the machine (F3) to update the changes.

    - Press key 0 to navigate between statistics pages. Press START to exit the mode.


    TODO:

    - Proper M5M82C255 device emulation.


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


#define MASTER_CLOCK		XTAL_12MHz	/* confirmed */

#include "driver.h"
#include "cpu/z80/z80.h"
#include "sound/ay8910.h"
#include "machine/8255ppi.h"

static tilemap *tmap;

static UINT8 *skylncr_videoram,*skylncr_colorram;

static UINT8* reeltiles_1_ram;
static UINT8* reeltiles_2_ram;
static UINT8* reeltiles_3_ram;
static UINT8* reeltiles_4_ram;
static UINT8* reeltileshigh_1_ram;
static UINT8* reeltileshigh_2_ram;
static UINT8* reeltileshigh_3_ram;
static UINT8* reeltileshigh_4_ram;
static tilemap *reel_1_tilemap;
static tilemap *reel_2_tilemap;
static tilemap *reel_3_tilemap;
static tilemap *reel_4_tilemap;
static UINT8* reelscroll1;
static UINT8* reelscroll2;
static UINT8* reelscroll3;
static UINT8* reelscroll4;

static UINT8 skylncr_nmi_enable;


/**************************************
*           Video Hardware            *
**************************************/

static WRITE8_HANDLER( skylncr_videoram_w )
{
	skylncr_videoram[offset] = data;
	tilemap_mark_tile_dirty(tmap, offset);
}

static WRITE8_HANDLER( skylncr_colorram_w )
{
	skylncr_colorram[offset] = data;
	tilemap_mark_tile_dirty(tmap, offset);
}


static TILE_GET_INFO( get_tile_info )
{
	UINT16 code = skylncr_videoram[ tile_index ] + (skylncr_colorram[ tile_index ] << 8);
	SET_TILE_INFO(0, code, 0, TILE_FLIPYX( 0 ));
}

static TILE_GET_INFO( get_reel_1_tile_info )
{
	UINT16 code = reeltiles_1_ram[ tile_index ] + (reeltileshigh_1_ram[ tile_index ] << 8);
	SET_TILE_INFO(1, code, 0, TILE_FLIPYX( 0 ));
}

static TILE_GET_INFO( get_reel_2_tile_info )
{
	UINT16 code = reeltiles_2_ram[ tile_index ] + (reeltileshigh_2_ram[ tile_index ] << 8);
	SET_TILE_INFO(1, code, 0, TILE_FLIPYX( 0 ));
}

static TILE_GET_INFO( get_reel_3_tile_info )
{
	UINT16 code = reeltiles_3_ram[ tile_index ] + (reeltileshigh_3_ram[ tile_index ] << 8);
	SET_TILE_INFO(1, code, 0, TILE_FLIPYX( 0 ));
}

static TILE_GET_INFO( get_reel_4_tile_info )
{
	UINT16 code = reeltiles_4_ram[ tile_index ] + (reeltileshigh_4_ram[ tile_index ] << 8);
	SET_TILE_INFO(1, code, 0, TILE_FLIPYX( 0 ));
}


static VIDEO_START( skylncr )
{

	tmap = tilemap_create(	machine, get_tile_info, tilemap_scan_rows, 8, 8, 0x40, 0x20	);

	reel_1_tilemap = tilemap_create(machine, get_reel_1_tile_info, tilemap_scan_rows, 8, 32, 64, 8 );
	reel_2_tilemap = tilemap_create(machine, get_reel_2_tile_info, tilemap_scan_rows, 8, 32, 64, 8 );
	reel_3_tilemap = tilemap_create(machine, get_reel_3_tile_info, tilemap_scan_rows, 8, 32, 64, 8 );
	reel_4_tilemap = tilemap_create(machine, get_reel_4_tile_info, tilemap_scan_rows, 8, 32, 64, 8 );

	tilemap_set_scroll_cols(reel_2_tilemap, 0x40);
	tilemap_set_scroll_cols(reel_3_tilemap, 0x40);
	tilemap_set_scroll_cols(reel_4_tilemap, 0x40);

	tilemap_set_transparent_pen(reel_2_tilemap, 0);
	tilemap_set_transparent_pen(reel_3_tilemap, 0);
	tilemap_set_transparent_pen(reel_4_tilemap, 0);


	tilemap_set_transparent_pen(tmap, 0);
}

// are these hardcoded, or registers?
static const rectangle visible1 = { 0*8, (20+48)*8-1,  4*8,  (4+7)*8-1 };
static const rectangle visible2 = { 0*8, (20+48)*8-1, 12*8, (12+7)*8-1 };
static const rectangle visible3 = { 0*8, (20+48)*8-1, 20*8, (20+7)*8-1 };


static VIDEO_UPDATE( skylncr )
{
	int i;

	bitmap_fill(bitmap,cliprect,0);
	tilemap_draw(bitmap,cliprect, reel_1_tilemap, 0, 0);

	for (i= 0;i < 64;i++)
	{
		tilemap_set_scrolly(reel_2_tilemap, i, reelscroll2[i]);
		tilemap_set_scrolly(reel_3_tilemap, i, reelscroll3[i]);
		tilemap_set_scrolly(reel_4_tilemap, i, reelscroll4[i]);
	}

	tilemap_draw(bitmap,&visible1,reel_2_tilemap, 0, 0);
	tilemap_draw(bitmap,&visible2,reel_3_tilemap, 0, 0);
	tilemap_draw(bitmap,&visible3,reel_4_tilemap, 0, 0);


	tilemap_draw(bitmap,cliprect, tmap, 0, 0);
	return 0;
}

static WRITE8_HANDLER( reeltiles_1_w )
{
	reeltiles_1_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_1_tilemap, offset);
}

static WRITE8_HANDLER( reeltiles_2_w )
{
	reeltiles_2_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_2_tilemap, offset);
}

static WRITE8_HANDLER( reeltiles_3_w )
{
	reeltiles_3_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_3_tilemap, offset);
}

static WRITE8_HANDLER( reeltiles_4_w )
{
	reeltiles_4_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_4_tilemap, offset);
}

static WRITE8_HANDLER( reeltileshigh_1_w )
{
	reeltileshigh_1_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_1_tilemap, offset);
}

static WRITE8_HANDLER( reeltileshigh_2_w )
{
	reeltileshigh_2_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_2_tilemap, offset);
}

static WRITE8_HANDLER( reeltileshigh_3_w )
{
	reeltileshigh_3_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_3_tilemap, offset);
}

static WRITE8_HANDLER( reeltileshigh_4_w )
{
	reeltileshigh_4_ram[offset] = data;
	tilemap_mark_tile_dirty(reel_4_tilemap, offset);
}


static WRITE8_HANDLER( skylncr_paletteram_w )
{
	static int color;

	if (offset == 0)
	{
		color = data;
	}
	else
	{
		int r,g,b;
		paletteram[color] = data;

		r = paletteram[(color/3 * 3) + 0];
		g = paletteram[(color/3 * 3) + 1];
		b = paletteram[(color/3 * 3) + 2];
		r = (r << 2) | (r >> 4);
		g = (g << 2) | (g >> 4);
		b = (b << 2) | (b >> 4);

		palette_set_color(space->machine, color / 3, MAKE_RGB(r, g, b));
		color = (color + 1) % (0x100 * 3);
	}
}

static WRITE8_HANDLER( skylncr_paletteram2_w )
{
	static int color;

	if (offset == 0)
	{
		color = data;
	}
	else
	{
		int r,g,b;
		paletteram_2[color] = data;

		r = paletteram_2[(color/3 * 3) + 0];
		g = paletteram_2[(color/3 * 3) + 1];
		b = paletteram_2[(color/3 * 3) + 2];
		r = (r << 2) | (r >> 4);
		g = (g << 2) | (g >> 4);
		b = (b << 2) | (b >> 4);

		palette_set_color(space->machine, 0x100 + color / 3, MAKE_RGB(r, g, b));
		color = (color + 1) % (0x100 * 3);
	}
}

static WRITE8_HANDLER( reelscroll1_w )
{
	reelscroll1[offset] = data;
}

static WRITE8_HANDLER( reelscroll2_w )
{
	reelscroll2[offset] = data;
}

static WRITE8_HANDLER( reelscroll3_w )
{
	reelscroll3[offset] = data;
}

static WRITE8_HANDLER( reelscroll4_w )
{
	reelscroll4[offset] = data;
}


/************************************
*         Other Handlers            *
************************************/

static WRITE8_HANDLER( skylncr_coin_w )
{
	coin_counter_w( 0, data & 0x04 );
}

static READ8_HANDLER( ret_ff )
{
	return 0xff;
}

#ifdef UNUSED_FUNCTION
static READ8_HANDLER( ret_00 )
{
	return 0x00;
}
#endif

static WRITE8_HANDLER( skylncr_nmi_enable_w )
{
	skylncr_nmi_enable = data & 0x10;
}


/**************************************
*             Memory Map              *
**************************************/

static ADDRESS_MAP_START( mem_map_skylncr, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM
	AM_RANGE(0x8000, 0x87ff) AM_RAM AM_BASE(&generic_nvram) AM_SIZE(&generic_nvram_size)

	AM_RANGE(0x8800, 0x8fff) AM_READWRITE( SMH_RAM, skylncr_videoram_w ) AM_BASE( &skylncr_videoram )
	AM_RANGE(0x9000, 0x97ff) AM_READWRITE( SMH_RAM, skylncr_colorram_w ) AM_BASE( &skylncr_colorram )

	AM_RANGE(0x9800, 0x99ff) AM_READWRITE( SMH_RAM, reeltiles_1_w ) AM_BASE( &reeltiles_1_ram )
	AM_RANGE(0x9a00, 0x9bff) AM_READWRITE( SMH_RAM, reeltiles_2_w ) AM_BASE( &reeltiles_2_ram )
	AM_RANGE(0x9c00, 0x9dff) AM_READWRITE( SMH_RAM, reeltiles_3_w ) AM_BASE( &reeltiles_3_ram )
	AM_RANGE(0x9e00, 0x9fff) AM_READWRITE( SMH_RAM, reeltiles_4_w ) AM_BASE( &reeltiles_4_ram )
	AM_RANGE(0xa000, 0xa1ff) AM_READWRITE( SMH_RAM, reeltileshigh_1_w ) AM_BASE( &reeltileshigh_1_ram )
	AM_RANGE(0xa200, 0xa3ff) AM_READWRITE( SMH_RAM, reeltileshigh_2_w ) AM_BASE( &reeltileshigh_2_ram )
	AM_RANGE(0xa400, 0xa5ff) AM_READWRITE( SMH_RAM, reeltileshigh_3_w ) AM_BASE( &reeltileshigh_3_ram )
	AM_RANGE(0xa600, 0xa7ff) AM_READWRITE( SMH_RAM, reeltileshigh_4_w ) AM_BASE( &reeltileshigh_4_ram )

	AM_RANGE(0xaa55, 0xaa55) AM_READ( ret_ff )

	AM_RANGE(0xb000, 0xb03f) AM_RAM AM_WRITE(reelscroll1_w) AM_BASE(&reelscroll1)
	AM_RANGE(0xb040, 0xb07f) AM_RAM AM_WRITE(reelscroll1_w)
	AM_RANGE(0xb080, 0xb0bf) AM_RAM AM_WRITE(reelscroll1_w)
	AM_RANGE(0xb0c0, 0xb0ff) AM_RAM AM_WRITE(reelscroll1_w)
	AM_RANGE(0xb100, 0xb13f) AM_RAM AM_WRITE(reelscroll1_w)
	AM_RANGE(0xb140, 0xb17f) AM_RAM AM_WRITE(reelscroll1_w)
	AM_RANGE(0xb180, 0xb1bf) AM_RAM AM_WRITE(reelscroll1_w)
	AM_RANGE(0xb1c0, 0xb1ff) AM_RAM AM_WRITE(reelscroll1_w)

	AM_RANGE(0xb200, 0xb23f) AM_RAM AM_WRITE(reelscroll2_w) AM_BASE(&reelscroll2)
	AM_RANGE(0xb240, 0xb27f) AM_RAM AM_WRITE(reelscroll2_w)
	AM_RANGE(0xb280, 0xb2bf) AM_RAM AM_WRITE(reelscroll2_w)
	AM_RANGE(0xb2c0, 0xb2ff) AM_RAM AM_WRITE(reelscroll2_w)
	AM_RANGE(0xb300, 0xb33f) AM_RAM AM_WRITE(reelscroll2_w)
	AM_RANGE(0xb340, 0xb37f) AM_RAM AM_WRITE(reelscroll2_w)
	AM_RANGE(0xb380, 0xb3bf) AM_RAM AM_WRITE(reelscroll2_w)
	AM_RANGE(0xb3c0, 0xb3ff) AM_RAM AM_WRITE(reelscroll2_w)

	AM_RANGE(0xb400, 0xb43f) AM_RAM AM_WRITE(reelscroll3_w) AM_BASE(&reelscroll3)
	AM_RANGE(0xb440, 0xb47f) AM_RAM AM_WRITE(reelscroll3_w)
	AM_RANGE(0xb480, 0xb4bf) AM_RAM AM_WRITE(reelscroll3_w)
	AM_RANGE(0xb4c0, 0xb4ff) AM_RAM AM_WRITE(reelscroll3_w)
	AM_RANGE(0xb500, 0xb53f) AM_RAM AM_WRITE(reelscroll3_w)
	AM_RANGE(0xb540, 0xb57f) AM_RAM AM_WRITE(reelscroll3_w)
	AM_RANGE(0xb580, 0xb5bf) AM_RAM AM_WRITE(reelscroll3_w)
	AM_RANGE(0xb5c0, 0xb5ff) AM_RAM AM_WRITE(reelscroll3_w)

	AM_RANGE(0xb600, 0xb63f) AM_RAM AM_WRITE(reelscroll4_w) AM_BASE(&reelscroll4)
	AM_RANGE(0xb640, 0xb67f) AM_RAM AM_WRITE(reelscroll4_w)
	AM_RANGE(0xb680, 0xb6bf) AM_RAM AM_WRITE(reelscroll4_w)
	AM_RANGE(0xb6c0, 0xb6ff) AM_RAM AM_WRITE(reelscroll4_w)
	AM_RANGE(0xb700, 0xb73f) AM_RAM AM_WRITE(reelscroll4_w)
	AM_RANGE(0xb740, 0xb77f) AM_RAM AM_WRITE(reelscroll4_w)
	AM_RANGE(0xb780, 0xb7bf) AM_RAM AM_WRITE(reelscroll4_w)
	AM_RANGE(0xb7c0, 0xb7ff) AM_RAM AM_WRITE(reelscroll4_w)

	AM_RANGE(0xc000, 0xffff) AM_ROM
ADDRESS_MAP_END


static ADDRESS_MAP_START( io_map_skylncr, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_GLOBAL_MASK(0xff)

	AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("ppi8255_0", ppi8255_r, ppi8255_w)	/* Input Ports */
	AM_RANGE(0x10, 0x13) AM_DEVREADWRITE("ppi8255_1", ppi8255_r, ppi8255_w)	/* Input Ports */

	AM_RANGE(0x20, 0x20) AM_WRITE( skylncr_coin_w )

	AM_RANGE(0x30, 0x31) AM_DEVWRITE( "ay", ay8910_address_data_w )
	AM_RANGE(0x31, 0x31) AM_DEVREAD( "ay", ay8910_r )

	AM_RANGE(0x40, 0x41) AM_WRITE( skylncr_paletteram_w )
	AM_RANGE(0x50, 0x51) AM_WRITE( skylncr_paletteram2_w )

	AM_RANGE(0x70, 0x70) AM_WRITE( skylncr_nmi_enable_w )
ADDRESS_MAP_END


/***************************************
*           Graphics Layouts           *
***************************************/

static const gfx_layout layout8x8x8 =
{
	8,8,
	RGN_FRAC(1,2),
	8,
	{ STEP8(0,1) },
	{
		8*0,8*1,
		RGN_FRAC(1,2)+8*0,RGN_FRAC(1,2)+8*1,
		8*2,8*3,
		RGN_FRAC(1,2)+8*2,RGN_FRAC(1,2)+8*3
	},
	{ STEP8(0,8*4) },
	8*8*4
};

static const gfx_layout layout8x32x8 =
{
	8,32,
	RGN_FRAC(1,2),
	8,
	{ STEP8(0,1) },
	{
		8*0, 8*1,
		RGN_FRAC(1,2)+8*0, RGN_FRAC(1,2)+8*1,
		8*2, 8*3,
		RGN_FRAC(1,2)+8*2, RGN_FRAC(1,2)+8*3
	},
	{
		STEP16(0,8*4),
		STEP16(16*8*4,8*4)
	},
	8*32*8/2
};

/* this will decode the big x2 x3 'correctly' however, maybe they're
   simply not meant to appear correct? */
static const gfx_layout layout8x32x8_rot =
{
	8,32,
	RGN_FRAC(1,2),
	8,
	{ STEP8(0,1) },
	{
		8*0, 8*1,
		RGN_FRAC(1,2)+8*1, RGN_FRAC(1,2)+8*0,
		8*2, 8*3,
		RGN_FRAC(1,2)+8*3, RGN_FRAC(1,2)+8*2
	},
	{
		STEP16(0,8*4),
		STEP16(16*8*4,8*4)
	},
	8*32*8/2
};


/**************************************
*           Graphics Decode           *
**************************************/

static GFXDECODE_START( skylncr )
	GFXDECODE_ENTRY( "gfx1", 0, layout8x8x8,		0, 2 )
	GFXDECODE_ENTRY( "gfx2", 0, layout8x32x8,		0, 2 )
	GFXDECODE_ENTRY( "gfx2", 0, layout8x32x8_rot,	0, 2 )
GFXDECODE_END


/***********************************
*           Input Ports            *
***********************************/

static INPUT_PORTS_START( skylncr )
	PORT_START("IN1")	/* $00 (PPI0 port A) */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON6) PORT_CODE(KEYCODE_X) PORT_NAME("Stop 2")
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON5) PORT_CODE(KEYCODE_Z) PORT_NAME("Stop 1")
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON7) PORT_CODE(KEYCODE_C) PORT_NAME("Stop 3")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN)

	PORT_START("IN2")	/* $01 (PPI0 port B) */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_CODE(KEYCODE_2) PORT_NAME("Bet")
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON9) PORT_CODE(KEYCODE_S) PORT_NAME("Option 2 (D-UP)")
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_CODE(KEYCODE_1) PORT_NAME("Start")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN)

	PORT_START("IN3")	/* $11 (PPI1 port B) */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )   PORT_IMPULSE(2)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )   PORT_IMPULSE(2)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN3 )   PORT_IMPULSE(2)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_SERVICE ) PORT_CODE(KEYCODE_Q) PORT_NAME("Key In")
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON8 ) PORT_CODE(KEYCODE_A) PORT_NAME("Option 1 (D-UP)")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_CODE(KEYCODE_3) PORT_NAME("D-UP")
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_CODE(KEYCODE_4) PORT_NAME("Take Score")

	PORT_START("IN4")	/* $12 (PPI1 port C) */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_SERVICE ) PORT_CODE(KEYCODE_R) PORT_NAME("Reset")
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SERVICE ) PORT_CODE(KEYCODE_0) PORT_NAME("Stats")
	PORT_SERVICE_NO_TOGGLE( 0x08, IP_ACTIVE_LOW )	/* Settings */
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_SERVICE ) PORT_CODE(KEYCODE_W) PORT_NAME("Key Out")

	PORT_START("DSW1")	/* $02 (PPI0 port C) */
	PORT_DIPNAME( 0x11, 0x01, "D-UP Percentage" )
	PORT_DIPSETTING(    0x11, "60%" )
	PORT_DIPSETTING(    0x01, "70%" )
	PORT_DIPSETTING(    0x10, "80%" )
	PORT_DIPSETTING(    0x00, "90%" )
	PORT_DIPNAME( 0x0e, 0x0e, "Main Game Percentage" )
	PORT_DIPSETTING(    0x0e, "75%" )
	PORT_DIPSETTING(    0x0c, "78%" )
	PORT_DIPSETTING(    0x0a, "81%" )
	PORT_DIPSETTING(    0x08, "84%" )
	PORT_DIPSETTING(    0x06, "87%" )
	PORT_DIPSETTING(    0x04, "90%" )
	PORT_DIPSETTING(    0x02, "93%" )
	PORT_DIPSETTING(    0x00, "96%" )
	PORT_DIPNAME( 0x20, 0x20, "Reels Speed" )
	PORT_DIPSETTING(    0x20, "Slow" )
	PORT_DIPSETTING(    0x00, "Fast" )
	PORT_DIPNAME( 0x40, 0x40, "Bonus Score" )
	PORT_DIPSETTING(    0x40, "32" )
	PORT_DIPSETTING(    0x00, "24" )
	PORT_DIPNAME( 0x80, 0x00, "Key Out" )
	PORT_DIPSETTING(    0x80, "x100" )
	PORT_DIPSETTING(    0x00, "x1" )

	PORT_START("DSW2")	/* $10 (PPI1 port A) */
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, "Double-Up" )
	PORT_DIPSETTING(    0x00, DEF_STR( No ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x18, 0x08, "Payout Limit" )
	PORT_DIPSETTING(    0x00, "0" )
	PORT_DIPSETTING(    0x08, "5000" )
	PORT_DIPSETTING(    0x10, "2000" )
	PORT_DIPSETTING(    0x18, "1000" )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0xc0, 0xc0, "Clown Percentage" )
	PORT_DIPSETTING(    0xc0, "60%" )
	PORT_DIPSETTING(    0x80, "70%" )
	PORT_DIPSETTING(    0x40, "80%" )
	PORT_DIPSETTING(    0x00, "90%" )

	PORT_START("DSW3")	/* AY8910 port A */
	PORT_DIPNAME( 0x07, 0x07, "Coinage A, B & C" )
	PORT_DIPSETTING(    0x00, "1 Coin / 1 Credit" )
	PORT_DIPSETTING(    0x01, "1 Coin / 5 Credits" )
	PORT_DIPSETTING(    0x02, "1 Coin / 10 Credits" )
	PORT_DIPSETTING(    0x03, "1 Coin / 20 Credits" )
	PORT_DIPSETTING(    0x04, "1 Coin / 30 Credits" )
	PORT_DIPSETTING(    0x05, "1 Coin / 40 Credits" )
	PORT_DIPSETTING(    0x06, "1 Coin / 50 Credits" )
	PORT_DIPSETTING(    0x07, "1 Coin / 100 Credit" )
	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( 0x20, 0x20, "Max Win Bonus" )
	PORT_DIPSETTING(    0x20, "10000" )
	PORT_DIPSETTING(    0x00, "20000" )
	PORT_DIPNAME( 0xc0, 0xc0, "Minimum Bet" )
	PORT_DIPSETTING(    0xc0, "0" )
	PORT_DIPSETTING(    0x80, "8" )
	PORT_DIPSETTING(    0x40, "16" )
	PORT_DIPSETTING(    0x00, "32" )

	PORT_START("DSW4")	/* AY8910 port B */
	PORT_DIPNAME( 0x07, 0x07, "Remote Credits" )
	PORT_DIPSETTING(    0x00, "1 Pulse / 100 Credits" )
	PORT_DIPSETTING(    0x01, "1 Pulse / 110 Credits" )
	PORT_DIPSETTING(    0x02, "1 Pulse / 120 Credits" )
	PORT_DIPSETTING(    0x03, "1 Pulse / 130 Credits" )
	PORT_DIPSETTING(    0x04, "1 Pulse / 200 Credits" )
	PORT_DIPSETTING(    0x05, "1 Pulse / 400 Credits" )
	PORT_DIPSETTING(    0x06, "1 Pulse / 500 Credits" )
	PORT_DIPSETTING(    0x07, "1 Pulse / 1000 Credits" )
	PORT_DIPNAME( 0x18, 0x00, "Max Bet" )
	PORT_DIPSETTING(    0x18, "32" )
	PORT_DIPSETTING(    0x10, "64" )
	PORT_DIPSETTING(    0x08, "72" )
	PORT_DIPSETTING(    0x00, "80" )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END


/**************************************
*       PPI 8255 (x2) Interface       *
**************************************/

static const ppi8255_interface ppi8255_intf[2] =
{
	{	/* A, B & C set as input */
		DEVCB_INPUT_PORT("IN1"),	/* Port A read */
		DEVCB_INPUT_PORT("IN2"),	/* Port B read */
		DEVCB_INPUT_PORT("DSW1"),	/* Port C read */
		DEVCB_NULL,					/* Port A write */
		DEVCB_NULL,					/* Port B write */
		DEVCB_NULL					/* Port C write */
	},
	{	/* A, B & C set as input */
		DEVCB_INPUT_PORT("DSW2"),	/* Port A read */
		DEVCB_INPUT_PORT("IN3"),	/* Port B read */
		DEVCB_INPUT_PORT("IN4"),	/* Port C read */
		DEVCB_NULL,					/* Port A write */
		DEVCB_NULL,					/* Port B write */
		DEVCB_NULL					/* Port C write */
	}
};


/**********************************
*       AY-3-8910 Interface       *
**********************************/

static const ay8910_interface ay8910_config =
{
	AY8910_LEGACY_OUTPUT,
	AY8910_DEFAULT_LOADS,
	DEVCB_INPUT_PORT("DSW3"),
	DEVCB_INPUT_PORT("DSW4"),
	DEVCB_NULL,
	DEVCB_NULL
};


// It runs in IM 0, thus needs an opcode on the data bus
static INTERRUPT_GEN( skylncr_vblank_interrupt )
{
	if (skylncr_nmi_enable) cpu_set_input_line(device, INPUT_LINE_NMI, PULSE_LINE);
}


/*************************************
*           Machine Driver           *
*************************************/

static MACHINE_DRIVER_START( skylncr )

	/* basic machine hardware */
	MDRV_CPU_ADD("maincpu", Z80, MASTER_CLOCK/4)
	MDRV_CPU_PROGRAM_MAP(mem_map_skylncr)
	MDRV_CPU_IO_MAP(io_map_skylncr)
	MDRV_CPU_VBLANK_INT("screen", skylncr_vblank_interrupt)

	MDRV_NVRAM_HANDLER(generic_0fill)

	/* 1x M5M82C255, or 2x PPI8255 */
	MDRV_PPI8255_ADD( "ppi8255_0", ppi8255_intf[0] )
	MDRV_PPI8255_ADD( "ppi8255_1", ppi8255_intf[1] )

	/* video hardware */
	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(512, 256)
	MDRV_SCREEN_VISIBLE_AREA(0, 512-1, 0, 256-1)

	MDRV_GFXDECODE(skylncr)
	MDRV_PALETTE_LENGTH(0x200)

	MDRV_VIDEO_START(skylncr)
	MDRV_VIDEO_UPDATE(skylncr)

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_MONO("mono")
	MDRV_SOUND_ADD("ay", AY8910, MASTER_CLOCK/8)
	MDRV_SOUND_CONFIG(ay8910_config)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END


/**********************************
*            ROM Load             *
**********************************/
/*

Sky Lancer PCB Layout
---------------------

  |--------------------------------------------|
 _|                          ROM.U33           |
|                                              |
|                            ROM.U32           |
|    WF19054                                   |
|                                              |
|_                                             |
  |                                  6264      |
  |                     |------|     6116      |
 _|           DSW4(8)   |ACTEL |               |
|             DSW3(8)   |A1010B|               |
|             DSW2(8)   |      |          6264 |
|             DSW1(8)   |------|               |
|                                         6264 |
|    M5M82C255                                 |
|                                              |
|       ROM.U35                                |
|3.6V_BATT                                     |
|_          6116              Z80        12MHz |
  |--------------------------------------------|
Notes:
      Z80 @ 3.0MHz [12/4]
      WF19054 = AY-3-8910 @ 1.5MHz [12/8]
*/

ROM_START( skylncr )
	ROM_REGION( 0x80000, "maincpu", 0 )
	ROM_LOAD( "27512.u35",  0x00000, 0x10000, CRC(98b1c9fe) SHA1(9ca1706d25038a078fb07ba5c2e6681ed468bc88) )

	ROM_REGION( 0x80000, "gfx1", 0 )
	ROM_LOAD( "574200.u32", 0x00000, 0x80000, CRC(b36f11fe) SHA1(1d8660ac1ca44e33976ac14210e4a3a201f8f3c4) )

	ROM_REGION( 0x80000, "gfx2", 0 )
	ROM_LOAD( "574200.u33", 0x00000, 0x80000, CRC(19b25221) SHA1(2f32d337125a9fd0bc7f50713b05e564fd4f81b2) )
ROM_END

ROM_START( butrfly )
	ROM_REGION( 0x80000, "maincpu", 0 )
	ROM_LOAD( "butterfly.prg",  0x00000, 0x10000, CRC(b35b289c) SHA1(5a02bfb6e1fb608099b9f491c10795ef888a3b36) )

	ROM_REGION( 0x80000, "gfx1", 0 )
	ROM_LOAD16_BYTE( "u29", 0x00000, 0x20000, CRC(2ff775ea) SHA1(2219c75cbac2969485607446ab116587bdee7278) )
	ROM_LOAD16_BYTE( "u31", 0x00001, 0x20000, CRC(029d2214) SHA1(cf8256157db0b297ed457b3da6b6517907128843) )
	ROM_LOAD16_BYTE( "u33", 0x40000, 0x20000, CRC(37bad677) SHA1(c077f0c07b097b376a01e5637446e4c4f82d9e28) )
	ROM_LOAD16_BYTE( "u35", 0x40001, 0x20000, CRC(d14c7713) SHA1(c229ef64f3b0a04ff8e27bc56cff6a55ca34b80c) )

	ROM_REGION( 0x80000, "gfx2", 0 )
	ROM_LOAD16_BYTE( "u52", 0x00000, 0x20000, CRC(15051537) SHA1(086c38c05c605f297a7bc470eb51763a7648e72c) )
	ROM_LOAD16_BYTE( "u54", 0x00001, 0x20000, CRC(8e34d029) SHA1(ae316f2f34768938a07d62db110ce59d2751abaa) )
	ROM_LOAD16_BYTE( "u56", 0x40000, 0x20000, CRC(a53daaef) SHA1(7b88bb986bd5e47576163d6999f8770c720c5bfc) )
	ROM_LOAD16_BYTE( "u58", 0x40001, 0x20000, CRC(21ca47f8) SHA1(b192be06a2eb817776309580dc64fd76772a8d50) )
ROM_END

/*

Mad Zoo PCB Layout
------------------

|-----|  |------|  |---------------------------|
|     |--|      |--|ROM.U29           ROM.U52  |
|                                              |
| DSW3(8)           ROM.U31           ROM.U54  |
|    KC89C72                                   |
| DSW4(8)           ROM.U33           ROM.U56  |
|_                                             |
  |       PAL       ROM.U35           ROM.U58  |
  |                     |-------|              |
 _|                     |LATTICE|         6116 |
|             12MHz     |1016   |              |
|                       |       |         6116 |
|       8255            |-------|              |
|                                         6116 |
| DSW1(8)  DSW2(8)                             |
|       8255   PAL  ROM.U9                6116 |
|                                              |
|    6264      Z80  6116                  6116 |
|_   6264                          PAL  BATTERY|
  |--------------------------------------------|
Notes:
      Z80 @ 3.0MHz [12/4]
      KC89C72 = AY-3-8910 @ 1.5MHz [12/8]
*/

ROM_START( madzoo )
	ROM_REGION( 0x80000, "maincpu", 0 )
	ROM_LOAD( "27512.u9",  0x00000, 0x10000, CRC(98b1c9fe) SHA1(9ca1706d25038a078fb07ba5c2e6681ed468bc88) )

	ROM_REGION( 0x80000, "gfx1", 0 )
	ROM_LOAD16_BYTE( "27c301.u29", 0x00000, 0x20000, CRC(44645bb8) SHA1(efaf88d63e09029aa023ddaf72dbd9ee1df10315) )
	ROM_LOAD16_BYTE( "27c301.u31", 0x00001, 0x20000, CRC(58267dbc) SHA1(dd64e4b44d10e2d93ded255622891f058b2b8bb9) )
	ROM_LOAD16_BYTE( "27c301.u33", 0x40000, 0x20000, CRC(6adb1c2c) SHA1(d782a778a34e6240a3ae09cd11124790864a9149) )
	ROM_LOAD16_BYTE( "27c301.u35", 0x40001, 0x20000, CRC(a8d3a174) SHA1(b668bb1db1d27aff52e808aa9b972f24693161b3) )

	ROM_REGION( 0x80000, "gfx2", 0 )
	ROM_LOAD16_BYTE( "27c301.u52", 0x00000, 0x20000, CRC(dd1997ed) SHA1(9197a0b4a0b6284ae7eeb6364c87589f6f8a614d) )
	ROM_LOAD16_BYTE( "27c301.u54", 0x00001, 0x20000, CRC(a654a6df) SHA1(54292953df1103ad830e1f40fdf96c48e0e13be7) )
	ROM_LOAD16_BYTE( "27c301.u56", 0x40000, 0x20000, CRC(f2e3c394) SHA1(8e09516fe822d7c125be57b154c896ab3e024f98) )
	ROM_LOAD16_BYTE( "27c301.u58", 0x40001, 0x20000, CRC(65d2015b) SHA1(121494a2684276276e2504d6f853718e93f4d458) )
ROM_END

ROM_START( leader )
	ROM_REGION( 0x80000, "maincpu", 0 )
	ROM_LOAD( "leader.prg",  0x00000, 0x10000, CRC(1a6e1129) SHA1(639f687e7720bab89628b377dca0475f17a35041) )

	ROM_REGION( 0x80000, "gfx1", 0 )
	ROM_LOAD16_BYTE( "leadergfx1.dmp11", 0x00000, 0x20000, CRC(08acae31) SHA1(8b93066a2159e56607499fe1b1748a70a73a326c) )
	ROM_LOAD16_BYTE( "leadergfx1.dmp21", 0x00001, 0x20000, CRC(88cd7a49) SHA1(f7187c7e3e584180de03998f376001f8d5966882) )
	ROM_LOAD16_BYTE( "leadergfx1.dmp12", 0x40000, 0x20000, CRC(e57e145e) SHA1(3f6169ed1d907de3438787c02dc53c73ca6bdb73) )
	ROM_LOAD16_BYTE( "leadergfx1.dmp22", 0x40001, 0x20000, CRC(e8368d29) SHA1(19e7d7d6e320f5f06e91013cb4c92b3987dbe24e) )

	ROM_REGION( 0x80000, "gfx2", 0 )
	ROM_LOAD16_BYTE( "leadergfx2.dmp11", 0x00000, 0x20000, CRC(1d62edf4) SHA1(7ba43bf0d0d0cadd5c7fcbe940ecf3fab5c9127b) )
	ROM_LOAD16_BYTE( "leadergfx2.dmp21", 0x00001, 0x20000, CRC(57b9d159) SHA1(ee98aea160653d55017bd893cc253d23c7b1faf4) )
	ROM_LOAD16_BYTE( "leadergfx2.dmp12", 0x40000, 0x20000, CRC(91e73bf9) SHA1(90a9c1119ae05bbd66a4d3c2266ec02cc53969bd) )
	ROM_LOAD16_BYTE( "leadergfx2.dmp22", 0x40001, 0x20000, CRC(04cc0118) SHA1(016ccbe7daf8c4676830aadcc906a64e2826d11a) )
ROM_END


/**********************************
*           Driver Init           *
**********************************/

static DRIVER_INIT( skylncr )
{
	paletteram   = auto_alloc_array(machine, UINT8, 0x100 * 3);
	paletteram_2 = auto_alloc_array(machine, UINT8, 0x100 * 3);
}


/****************************************************
*                  Game Drivers                     *
****************************************************/

/*    YEAR  NAME      PARENT   MACHINE   INPUT     INIT     ROT    COMPANY                 FULLNAME                            FLAGS  */
GAME( 1995, skylncr,  0,       skylncr,  skylncr,  skylncr, ROT0, "Bordun International", "Sky Lancer (Bordun, ver.U450C)",    0 )
GAME( 1995, butrfly,  0,       skylncr,  skylncr,  skylncr, ROT0, "Bordun International", "Butterfly Video Game (ver.U350C)",  0 )
GAME( 1995, madzoo,   0,       skylncr,  skylncr,  skylncr, ROT0, "Bordun International", "Mad Zoo (ver.U450C)",               0 )
GAME( 1995, leader,   0,       skylncr,  skylncr,  skylncr, ROT0, "Bootleg",              "Leader",                            GAME_NOT_WORKING )
