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

Dragon Buster (c) 1984 Namco
Sky Kid       (c) 1985 Namco

Driver by Manuel Abadia <manu@teleline.es>

Notes:
-----
- Sky Kid sets:
  There are 2 basic versions, one with CUS63 and rom prefix "SK2" and
  the other which uses CUS60 and has the rom prefix "SK1"

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

#include "driver.h"
#include "cpu/m6800/m6800.h"
#include "sound/namco.h"

extern UINT8 *skykid_textram, *skykid_videoram, *skykid_spriteram;

/* from video/skykid.c */
VIDEO_START( skykid );
READ8_HANDLER( skykid_videoram_r );
WRITE8_HANDLER( skykid_videoram_w );
READ8_HANDLER( skykid_textram_r );
WRITE8_HANDLER( skykid_textram_w );
WRITE8_HANDLER( skykid_scroll_x_w );
WRITE8_HANDLER( skykid_scroll_y_w );
WRITE8_HANDLER( skykid_flipscreen_priority_w );
VIDEO_UPDATE( skykid );
VIDEO_UPDATE( drgnbstr );
PALETTE_INIT( skykid );


static int inputport_selected;

static WRITE8_HANDLER( inputport_select_w )
{
	if ((data & 0xe0) == 0x60)
		inputport_selected = data & 0x07;
	else if ((data & 0xe0) == 0xc0)
	{
		coin_lockout_global_w(~data & 1);
		coin_counter_w(0,data & 2);
		coin_counter_w(1,data & 4);
	}
}

static READ8_HANDLER( inputport_r )
{
	switch (inputport_selected)
	{
		case 0x00:	/* DSW B (bits 0-4) */
			return (readinputport(1) & 0xf8) >> 3; break;
		case 0x01:	/* DSW B (bits 5-7), DSW A (bits 0-1) */
			return ((readinputport(1) & 0x07) << 2) | ((readinputport(0) & 0xc0) >> 6); break;
		case 0x02:	/* DSW A (bits 2-6) */
			return (readinputport(0) & 0x3e) >> 1; break;
		case 0x03:	/* DSW A (bit 7), DSW C (bits 0-3) */
			return ((readinputport(0) & 0x01) << 4) | (readinputport(2) & 0x0f); break;
		case 0x04:	/* coins, start */
			return readinputport(3); break;
		case 0x05:	/* 2P controls */
			return readinputport(5); break;
		case 0x06:	/* 1P controls */
			return readinputport(4); break;
		default:
			return 0xff;
	}
}

static WRITE8_HANDLER( skykid_led_w )
{
	set_led_status(0,data & 0x08);
	set_led_status(1,data & 0x10);
}

static WRITE8_HANDLER( skykid_subreset_w )
{
	int bit = !BIT(offset,11);
	cpunum_set_input_line(1, INPUT_LINE_RESET, bit ? CLEAR_LINE : ASSERT_LINE);
}

static WRITE8_HANDLER( skykid_bankswitch_w )
{
	int bit = !BIT(offset,11);
	UINT8 *rom = memory_region(REGION_CPU1) + 0x10000;

	memory_set_bankptr(1,rom + 0x2000 * bit);
}

static WRITE8_HANDLER( skykid_irq_1_ctrl_w )
{
	int bit = !BIT(offset,11);
	cpu_interrupt_enable(0,bit);
	if (!bit)
		cpunum_set_input_line(0, 0, CLEAR_LINE);
}

static WRITE8_HANDLER( skykid_irq_2_ctrl_w )
{
	int bit = !BIT(offset,13);
	cpu_interrupt_enable(1,bit);
	if (!bit)
		cpunum_set_input_line(1, 0, CLEAR_LINE);
}



static ADDRESS_MAP_START( skykid_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x1fff) AM_READ(MRA8_BANK1)				/* banked ROM */
	AM_RANGE(0x2000, 0x2fff) AM_READWRITE(skykid_videoram_r,skykid_videoram_w) AM_BASE(&skykid_videoram)/* Video RAM (background) */
	AM_RANGE(0x4000, 0x47ff) AM_READWRITE(skykid_textram_r,skykid_textram_w) AM_BASE(&skykid_textram)	/* video RAM (text layer) */
	AM_RANGE(0x4800, 0x5fff) AM_RAM AM_BASE(&skykid_spriteram)	/* RAM + Sprite RAM */
	AM_RANGE(0x6000, 0x60ff) AM_WRITE(skykid_scroll_y_w)		/* Y scroll register map */
	AM_RANGE(0x6200, 0x63ff) AM_WRITE(skykid_scroll_x_w)		/* X scroll register map */
	AM_RANGE(0x6800, 0x6bff) AM_READWRITE(namcos1_cus30_r,namcos1_cus30_w) AM_BASE(&namco_wavedata)/* PSG device, shared RAM */
	AM_RANGE(0x7000, 0x7fff) AM_WRITE(skykid_irq_1_ctrl_w)		/* IRQ control */
	AM_RANGE(0x7800, 0x7fff) AM_READ(watchdog_reset_r)			/* watchdog reset */
	AM_RANGE(0x8000, 0xffff) AM_READ(MRA8_ROM)					/* ROM */
	AM_RANGE(0x8000, 0x8fff) AM_WRITE(skykid_subreset_w)		/* MCU control */
	AM_RANGE(0x9000, 0x9fff) AM_WRITE(skykid_bankswitch_w)		/* Bankswitch control */
	AM_RANGE(0xa000, 0xa001) AM_WRITE(skykid_flipscreen_priority_w)	/* flip screen & priority */
ADDRESS_MAP_END

static ADDRESS_MAP_START( mcu_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x001f) AM_READWRITE(hd63701_internal_registers_r, hd63701_internal_registers_w)
	AM_RANGE(0x0080, 0x00ff) AM_RAM
	AM_RANGE(0x1000, 0x13ff) AM_READWRITE(namcos1_cus30_r, namcos1_cus30_w) AM_BASE(&namco_wavedata)		/* PSG device, shared RAM */
	AM_RANGE(0x2000, 0x3fff) AM_WRITE(watchdog_reset_w)		/* watchdog? */
	AM_RANGE(0x4000, 0x7fff) AM_WRITE(skykid_irq_2_ctrl_w)
	AM_RANGE(0x8000, 0xbfff) AM_READ(MRA8_ROM)
	AM_RANGE(0xc000, 0xc7ff) AM_RAM
	AM_RANGE(0xf000, 0xffff) AM_READ(MRA8_ROM)
ADDRESS_MAP_END


static READ8_HANDLER( readFF )
{
	return 0xff;
}

static ADDRESS_MAP_START( mcu_port_map, ADDRESS_SPACE_IO, 8 )
	AM_RANGE(HD63701_PORT1, HD63701_PORT1) AM_READ(inputport_r)			/* input ports read */
	AM_RANGE(HD63701_PORT1, HD63701_PORT1) AM_WRITE(inputport_select_w)	/* input port select */
	AM_RANGE(HD63701_PORT2, HD63701_PORT2) AM_READ(readFF)	/* leds won't work otherwise */
	AM_RANGE(HD63701_PORT2, HD63701_PORT2) AM_WRITE(skykid_led_w)			/* lamps */
ADDRESS_MAP_END



INPUT_PORTS_START( skykid )
	PORT_START	/* DSW A */
	PORT_SERVICE( 0x80, IP_ACTIVE_LOW )
	PORT_DIPNAME( 0x60, 0x60, DEF_STR( Coin_A ) )
	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( 0x10, 0x10, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, "Round Select" )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, "Freeze" )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_B ) )
	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	/* DSW B */
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x80, "1" )
	PORT_DIPSETTING(    0x40, "2" )
	PORT_DIPSETTING(    0xc0, "3" )
	PORT_DIPSETTING(    0x00, "5" )
	PORT_DIPNAME( 0x30, 0x30, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x00, "20k every 80k" )
	PORT_DIPSETTING(    0x10, "20k and 80k" )
	PORT_DIPSETTING(    0x20, "30k every 90k" )
	PORT_DIPSETTING(    0x30, "30k and 90k" )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x08, 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( 0x02, 0x02, "Allow Buy In" )
	PORT_DIPSETTING(    0x00, DEF_STR( No ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START	/* IN 0 */
	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	/* IN 1 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START	/* IN 2 */
	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

INPUT_PORTS_START( drgnbstr )
	PORT_START	/* DSW A */
	PORT_SERVICE( 0x80, IP_ACTIVE_LOW )
	PORT_DIPNAME( 0x60, 0x60, DEF_STR( Coin_A ) )
	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( 0x10, 0x10, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, "Round Skip" )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, "Freeze" )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_B ) )
	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	/* DSW B */
	PORT_DIPNAME( 0x80, 0x80, "Spurt Time" )
	PORT_DIPSETTING(    0x80, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x00, "Difficult" )
	PORT_DIPNAME( 0x40, 0x40, "Level of Monster" )
	PORT_DIPSETTING(    0x40, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x00, "Difficult" )
	PORT_DIPNAME( 0x30, 0x30, "Starting Vitality" )
	PORT_DIPSETTING(    0x00, "160" )
	PORT_DIPSETTING(    0x30, "128" )
	PORT_DIPSETTING(    0x10, "96" )
	PORT_DIPSETTING(    0x20, "64" )
	PORT_DIPNAME( 0x0c, 0x0c, "Bonus Vitality" ) /* Clear Mountain, Tower, ect... */
	PORT_DIPSETTING(    0x00, "64" )
	PORT_DIPSETTING(    0x08, "48/64" )
	PORT_DIPSETTING(    0x04, "32/64" )
	PORT_DIPSETTING(    0x0c, DEF_STR( None ) )
	PORT_DIPNAME( 0x02, 0x02, "Bonus Level" )    /* Clear Round */
	PORT_DIPSETTING(    0x02, "Full" )
	PORT_DIPSETTING(    0x00, "Partial" )
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Allow_Continue ) )
	PORT_DIPSETTING(    0x01, DEF_STR( No ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Yes ) )

	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START	/* IN 0 */
	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	/* IN 1 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START	/* IN 2 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_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,
	RGN_FRAC(1,1),
	2,
	{ 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 sprite_layout =
{
	16,16,
	RGN_FRAC(1,2),
	3,
	{ RGN_FRAC(1,2)+4, 0, 4 },
	{ 0, 1, 2, 3, 8*8, 8*8+1, 8*8+2, 8*8+3,
			16*8+0, 16*8+1, 16*8+2, 16*8+3, 24*8+0, 24*8+1, 24*8+2, 24*8+3 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
			32*8, 33*8, 34*8, 35*8, 36*8, 37*8, 38*8, 39*8 },
	64*8
};

static const gfx_decode gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &text_layout,   0, 64 },
	{ REGION_GFX2, 0, &tile_layout,   64*4, 128 },
	{ REGION_GFX3, 0, &sprite_layout, 64*4+128*4, 64 },
	{-1 }
};



static struct namco_interface namco_interface =
{
	8,					/* number of voices */
	-1,					/* memory region */
	0					/* stereo */
};



static MACHINE_DRIVER_START( skykid )

	/* basic machine hardware */
	MDRV_CPU_ADD(M6809,49152000/32)
	MDRV_CPU_PROGRAM_MAP(skykid_map,0)
	MDRV_CPU_VBLANK_INT(irq0_line_assert,1)

	MDRV_CPU_ADD(HD63701,49152000/32)	/* or compatible 6808 with extra instructions */
	MDRV_CPU_PROGRAM_MAP(mcu_map,0)
	MDRV_CPU_IO_MAP(mcu_port_map,0)
	MDRV_CPU_VBLANK_INT(irq0_line_assert,1)

	MDRV_SCREEN_REFRESH_RATE(60.606060)
	MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
	MDRV_INTERLEAVE(100)	/* we need heavy synch */

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(36*8, 28*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 36*8-1, 0*8, 28*8-1)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(256)
	MDRV_COLORTABLE_LENGTH(64*4+128*4+64*8)

	MDRV_PALETTE_INIT(skykid)
	MDRV_VIDEO_START(skykid)
	MDRV_VIDEO_UPDATE(skykid)

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

	MDRV_SOUND_ADD(NAMCO_CUS30, 49152000/2048)
	MDRV_SOUND_CONFIG(namco_interface)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END


ROM_START( skykid )
	ROM_REGION( 0x14000, REGION_CPU1, 0 )	/* 6809 code */
	ROM_LOAD( "sk2_2.6c",     0x08000, 0x4000, CRC(ea8a5822) SHA1(5b13133410bcb7d647e662b476dbfd2edab8aac0) )
	ROM_LOAD( "sk1-1c.6b",    0x0c000, 0x4000, CRC(7abe6c6c) SHA1(7d2631cc6149fa3e02b1355cb899de5474ff5d0a) )
	ROM_LOAD( "sk1_3.6d",     0x10000, 0x4000, CRC(314b8765) SHA1(d90a8a853ce672fe5ee190f07bcb33262c73df3b) )	/* banked ROM */

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* MCU code */
	ROM_LOAD( "sk2_4.3c",       0x8000, 0x2000, CRC(a460d0e0) SHA1(7124ffeb3b84b282940dcbf9421ae4934bcce1c8) )	/* subprogram for the MCU */
	ROM_LOAD( "cus63-63a1.mcu", 0xf000, 0x1000, CRC(6ef08fb3) SHA1(4842590d60035a0059b0899eb2d5f58ae72c2529) )	/* MCU internal code */

	ROM_REGION( 0x02000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_6.6l",     0x0000, 0x2000, CRC(58b731b9) SHA1(40f7be85914833ce02a734c20d68c0db8b77911d) )	/* chars */

	ROM_REGION( 0x02000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_5.7e",     0x0000, 0x2000, CRC(c33a498e) SHA1(9f89a514888418a9bebbca341a8cc66e41b58acb) )

	ROM_REGION( 0x10000, REGION_GFX3, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_8.10n",    0x0000, 0x4000, CRC(44bb7375) SHA1(5b2fa6782671150bab5f3c3ac46b47bc23f3d7e0) )	/* sprites */
	ROM_LOAD( "sk1_7.10m",    0x4000, 0x4000, CRC(3454671d) SHA1(723b26a0f208addc2a22736457cb4be6ab6c69cc) )
	/* 0x8000-0xbfff  will be unpacked from 0x4000-0x5fff */
	ROM_FILL(                 0xc000, 0x4000, 0x00 )	// part of the gfx is 2bpp decoded as 3bpp

	ROM_REGION( 0x0700, REGION_PROMS, 0 )
	ROM_LOAD( "sk1-1.2n",     0x0000, 0x0100, CRC(0218e726) SHA1(8b766162a4783c058d9a1ecf8741673d7ef955fb) )	/* red component */
	ROM_LOAD( "sk1-2.2p",     0x0100, 0x0100, CRC(fc0d5b85) SHA1(d1b13e42e735b24594cf0b840dee8110de23369e) )	/* green component */
	ROM_LOAD( "sk1-3.2r",     0x0200, 0x0100, CRC(d06b620b) SHA1(968a2d62c65e201d521e9efa8fcf6ad15898e4b3) )	/* blue component */
	ROM_LOAD( "sk1-4.5n",     0x0300, 0x0200, CRC(c697ac72) SHA1(3b79755e6cbb22c14fc4affdbd3f4521da1d90e8) )	/* tiles lookup table */
	ROM_LOAD( "sk1-5.6n",     0x0500, 0x0200, CRC(161514a4) SHA1(4488ce60d12be6586e4a1ddbbfd06bf4e7dfaceb) )	/* sprites lookup table */
ROM_END

ROM_START( skykido )
	ROM_REGION( 0x14000, REGION_CPU1, 0 )	/* 6809 code */
	ROM_LOAD( "sk2_2.6c",     0x08000, 0x4000, CRC(ea8a5822) SHA1(5b13133410bcb7d647e662b476dbfd2edab8aac0) )
	ROM_LOAD( "sk1_1.6b",     0x0c000, 0x4000, CRC(070a49d4) SHA1(4b994bde3e34b574bd927843804d2fb1a08d1bdf) )
	ROM_LOAD( "sk1_3.6d",     0x10000, 0x4000, CRC(314b8765) SHA1(d90a8a853ce672fe5ee190f07bcb33262c73df3b) )	/* banked ROM */

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* MCU code */
	ROM_LOAD( "sk2_4.3c",       0x8000, 0x2000, CRC(a460d0e0) SHA1(7124ffeb3b84b282940dcbf9421ae4934bcce1c8) )	/* subprogram for the MCU */
	ROM_LOAD( "cus63-63a1.mcu", 0xf000, 0x1000, CRC(6ef08fb3) SHA1(4842590d60035a0059b0899eb2d5f58ae72c2529) )	/* MCU internal code */

	ROM_REGION( 0x02000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_6.6l",     0x0000, 0x2000, CRC(58b731b9) SHA1(40f7be85914833ce02a734c20d68c0db8b77911d) )	/* chars */

	ROM_REGION( 0x02000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_5.7e",     0x0000, 0x2000, CRC(c33a498e) SHA1(9f89a514888418a9bebbca341a8cc66e41b58acb) )

	ROM_REGION( 0x10000, REGION_GFX3, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_8.10n",    0x0000, 0x4000, CRC(44bb7375) SHA1(5b2fa6782671150bab5f3c3ac46b47bc23f3d7e0) )	/* sprites */
	ROM_LOAD( "sk1_7.10m",    0x4000, 0x4000, CRC(3454671d) SHA1(723b26a0f208addc2a22736457cb4be6ab6c69cc) )
	/* 0x8000-0xbfff  will be unpacked from 0x4000-0x5fff */
	ROM_FILL(                 0xc000, 0x4000, 0x00 )	// part of the gfx is 2bpp decoded as 3bpp

	ROM_REGION( 0x0700, REGION_PROMS, 0 )
	ROM_LOAD( "sk1-1.2n",     0x0000, 0x0100, CRC(0218e726) SHA1(8b766162a4783c058d9a1ecf8741673d7ef955fb) )	/* red component */
	ROM_LOAD( "sk1-2.2p",     0x0100, 0x0100, CRC(fc0d5b85) SHA1(d1b13e42e735b24594cf0b840dee8110de23369e) )	/* green component */
	ROM_LOAD( "sk1-3.2r",     0x0200, 0x0100, CRC(d06b620b) SHA1(968a2d62c65e201d521e9efa8fcf6ad15898e4b3) )	/* blue component */
	ROM_LOAD( "sk1-4.5n",     0x0300, 0x0200, CRC(c697ac72) SHA1(3b79755e6cbb22c14fc4affdbd3f4521da1d90e8) )	/* tiles lookup table */
	ROM_LOAD( "sk1-5.6n",     0x0500, 0x0200, CRC(161514a4) SHA1(4488ce60d12be6586e4a1ddbbfd06bf4e7dfaceb) )	/* sprites lookup table */
ROM_END

ROM_START( skykidd )
	ROM_REGION( 0x14000, REGION_CPU1, 0 )	/* 6809 code */
	ROM_LOAD( "sk1_2.6c",     0x08000, 0x4000, CRC(8370671a) SHA1(7038f952ebfc4482440b73ee4027fa908561d122) )
	ROM_LOAD( "sk1_1.6b",     0x0c000, 0x4000, CRC(070a49d4) SHA1(4b994bde3e34b574bd927843804d2fb1a08d1bdf) )
	ROM_LOAD( "sk1_3.6d",     0x10000, 0x4000, CRC(314b8765) SHA1(d90a8a853ce672fe5ee190f07bcb33262c73df3b) )	/* banked ROM */

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* MCU code */
	ROM_LOAD( "sk1_4.3c",       0x8000, 0x2000, CRC(887137cc) SHA1(dd0f66afb78833c4da73539b692854346f448c0d) )	/* subprogram for the MCU */
	ROM_LOAD( "cus60-60a1.mcu", 0xf000, 0x1000, CRC(076ea82a) SHA1(22b5e62e26390d7d5cacc0503c7aa5ed524204df) )	/* MCU internal code */

	ROM_REGION( 0x02000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_6.6l",     0x0000, 0x2000, CRC(58b731b9) SHA1(40f7be85914833ce02a734c20d68c0db8b77911d) )	/* chars */

	ROM_REGION( 0x02000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_5.7e",     0x0000, 0x2000, CRC(c33a498e) SHA1(9f89a514888418a9bebbca341a8cc66e41b58acb) )

	ROM_REGION( 0x10000, REGION_GFX3, ROMREGION_DISPOSE )
	ROM_LOAD( "sk1_8.10n",    0x0000, 0x4000, CRC(44bb7375) SHA1(5b2fa6782671150bab5f3c3ac46b47bc23f3d7e0) )	/* sprites */
	ROM_LOAD( "sk1_7.10m",    0x4000, 0x4000, CRC(3454671d) SHA1(723b26a0f208addc2a22736457cb4be6ab6c69cc) )
	/* 0x8000-0xbfff  will be unpacked from 0x4000-0x5fff */
	ROM_FILL(                 0xc000, 0x4000, 0x00 )	// part of the gfx is 2bpp decoded as 3bpp

	ROM_REGION( 0x0700, REGION_PROMS, 0 )
	ROM_LOAD( "sk1-1.2n",     0x0000, 0x0100, CRC(0218e726) SHA1(8b766162a4783c058d9a1ecf8741673d7ef955fb) )	/* red component */
	ROM_LOAD( "sk1-2.2p",     0x0100, 0x0100, CRC(fc0d5b85) SHA1(d1b13e42e735b24594cf0b840dee8110de23369e) )	/* green component */
	ROM_LOAD( "sk1-3.2r",     0x0200, 0x0100, CRC(d06b620b) SHA1(968a2d62c65e201d521e9efa8fcf6ad15898e4b3) )	/* blue component */
	ROM_LOAD( "sk1-4.5n",     0x0300, 0x0200, CRC(c697ac72) SHA1(3b79755e6cbb22c14fc4affdbd3f4521da1d90e8) )	/* tiles lookup table */
	ROM_LOAD( "sk1-5.6n",     0x0500, 0x0200, CRC(161514a4) SHA1(4488ce60d12be6586e4a1ddbbfd06bf4e7dfaceb) )	/* sprites lookup table */
ROM_END

ROM_START( drgnbstr )
	ROM_REGION( 0x14000, REGION_CPU1, 0 ) /* 6809 code */
	ROM_LOAD( "db1_2b.6c",    0x08000, 0x04000, CRC(0f11cd17) SHA1(691d853f4f08898ecf4bccfb70a568de309329f1) )
	ROM_LOAD( "db1_1.6b",     0x0c000, 0x04000, CRC(1c7c1821) SHA1(8b6111afc42e2996bdc2fc276be0c40556cd431e) )
	ROM_LOAD( "db1_3.6d",     0x10000, 0x04000, CRC(6da169ae) SHA1(235211c26562fef0660e3fde1e87f2e52626d119) )	/* banked ROM */

	ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* MCU code */
	ROM_LOAD( "db1_4.3c",       0x8000, 0x02000, CRC(8a0b1fc1) SHA1(c2861d0da63e2d17f2d1ad46dccf753ecd902ce3) )	/* subprogram for the MCU */
	ROM_LOAD( "cus60-60a1.mcu", 0xf000, 0x01000, CRC(076ea82a) SHA1(22b5e62e26390d7d5cacc0503c7aa5ed524204df) )	/* MCU internal code */

	ROM_REGION( 0x02000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "db1_6.6l",     0x0000, 0x2000, CRC(c080b66c) SHA1(05dcd45274d0bd12ef8ae7fd10c8719e679b3e7b) )	/* tiles */

	ROM_REGION( 0x02000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "db1_5.7e",     0x0000, 0x2000, CRC(28129aed) SHA1(d7f52e871d97179ec88c142a1c70eb6ad09e534a) )

	ROM_REGION( 0x10000, REGION_GFX3, ROMREGION_DISPOSE )
	ROM_LOAD( "db1_8.10n",    0x0000, 0x4000, CRC(11942c61) SHA1(0f065cb82cf83967e90b3c7326b36956f4fa9a52) )	/* sprites */
	ROM_LOAD( "db1_7.10m",    0x4000, 0x4000, CRC(cc130fe2) SHA1(4f5d4f21152b3b4e523a6d17dd5ff5cef52447f2) )
	/* 0x8000-0xbfff  will be unpacked from 0x4000-0x5fff */
	ROM_FILL(                 0xc000, 0x4000, 0x00 )	// part of the gfx is 2bpp decoded as 3bpp

	ROM_REGION( 0x0700, REGION_PROMS, 0 )
	ROM_LOAD( "db1-1.2n",     0x0000, 0x0100, CRC(3f8cce97) SHA1(027b3fb0f322a9d68b434b207a40b31799a8a8d6) )	/* red component */
	ROM_LOAD( "db1-2.2p",     0x0100, 0x0100, CRC(afe32436) SHA1(e405787f7f2aa992edd63078e3944334d8acddb1) )	/* green component */
	ROM_LOAD( "db1-3.2r",     0x0200, 0x0100, CRC(c95ff576) SHA1(861a7340d29e6a6a0d5ead93abd3f73cc3df0cc7) )	/* blue component */
	ROM_LOAD( "db1-4.5n",     0x0300, 0x0200, CRC(b2180c21) SHA1(a5d14c31d54f04494ea99c3d94bd1b5e072b612e) )	/* tiles lookup table */
	ROM_LOAD( "db1-5.6n",     0x0500, 0x0200, CRC(5e2b3f74) SHA1(ef58661fa12a52bc358e81179254d37de7551b38) )	/* sprites lookup table */
ROM_END



static DRIVER_INIT( skykid )
{
	UINT8 *rom;
	int i;

	/* unpack the third sprite ROM */
	rom = memory_region(REGION_GFX3) + 0x4000;
	for (i = 0;i < 0x2000;i++)
	{
		rom[i + 0x4000] = rom[i];		// sprite set #1, plane 3
		rom[i + 0x6000] = rom[i] >> 4;	// sprite set #2, plane 3

		rom[i] = rom[i + 0x2000];		// sprite set #3, planes 1&2 (plane 3 is empty)
	}
}

GAME( 1984, drgnbstr, 0,      skykid, drgnbstr, skykid,  ROT0,   "Namco", "Dragon Buster", 0 )
GAME( 1985, skykid,   0,      skykid, skykid,   skykid,  ROT180, "Namco", "Sky Kid (New Ver.)", 0 ) /* Uses CUS63 aka 63a1 */
GAME( 1985, skykido,  skykid, skykid, skykid,   skykid,  ROT180, "Namco", "Sky Kid (Old Ver.)", 0 ) /* Uses CUS63 aka 63a1 */
GAME( 1985, skykidd,  skykid, skykid, skykid,   skykid,  ROT180, "Namco", "Sky Kid (CUS60 Ver.)", 0 ) /* Uses CUS60 aka 60a1 */
