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

Argus (Early NMK driver 1986-1987)
-------------------------------------
driver by Yochizo


Special thanks to :
=====================
 - Gerardo Oporto Jorrin for dipswitch informations.
 - Suzuki2go for screenshots of Argus and Valtric.
 - Jarek Parchanski for Psychic5 driver.


Supported games :
==================
 Argus      (C) 1986 NMK / Jaleco
 Valtric    (C) 1986 NMK / Jaleco
 Butasan    (C) 1987 NMK / Jaleco
 Bombs Away (C) 1988 Jaleco


System specs :
===============
 Argus
 ---------------------------------------------------------------
   CPU    : Z80 (4MHz) + Z80 (4MHz, Sound)
   Sound  : YM2203 x 1
   Layers : BG0, BG1, Sprite, Text [BG0 is controlled by VROMs]
   Colors : 832 colors
             Sprite : 128 colors
             BG0    : 256 colors
             BG1    : 256 colors
             Text   : 256 colors
   Others : Brightness controller  (Emulated)
            Half transparent color (Not emulated)

 Valtric
 ---------------------------------------------------------------
   CPU    : Z80 (5MHz) + Z80 (5MHz, Sound)
   Sound  : YM2203 x 2
   Layers : BG1, Sprite, Text
   Colors : 768 colors
             Sprite : 256 colors
             BG1    : 256 colors
             Text   : 256 colors
   Others : Brightness controller  (Emulated)
            Half transparent color (Not emulated)
            Mosaic effect          (Not emulated)

 Butasan
 ---------------------------------------------------------------
   CPU    : Z80 (5MHz) + Z80 (5MHz, Sound)
   Sound  : YM2203 x 2
   Layers : BG0, BG1, Sprite, Text [BG0 and BG1 is not shown simultaneously]
   Colors : 672 colors
             Sprite : 16x4 + 8x8 = 128 colors
             BG0    : 256 colors
             BG1    : 32 colors
             Text   : 256 colors
   Others : 2 VRAM pages           (Emulated)
            Various sprite sizes   (Emulated)


Note :
=======
 - To enter test mode, press coin 2 key at start in Argus and Valtric.


Known issues :
===============
 - Mosaic effect in Valtric is not implemented.
 - Half transparent color (50% alpha blending) is not emulated.
 - Sprite priority switch of Butasan is shown in test mode. What will be
   happened when set it ? JFF is not implemented this mistery switch too.
 - In Butasan, text layer will corrupt completely when you take a special
   item.
 - Data proms of Butasan does exist. But I don't know what is used for.
 - Though clock speed of Argus is actually 4 MHz, major sprite problems
   are broken out in the middle of slowdown. So, it is set 5 MHz now.
 - Sprite locations of Argus delay around 1 or 2 frames when horizontal
   scroll occurs.

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


#include "driver.h"
#include "sound/2203intf.h"


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

  Variables

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

extern UINT8 *argus_paletteram;
extern UINT8 *argus_txram;
extern UINT8 *argus_bg0ram;
extern UINT8 *argus_bg0_scrollx;
extern UINT8 *argus_bg0_scrolly;
extern UINT8 *argus_bg1ram;
extern UINT8 *argus_bg1_scrollx;
extern UINT8 *argus_bg1_scrolly;
extern UINT8 *butasan_bg1ram;

VIDEO_START( argus );
VIDEO_START( valtric );
VIDEO_START( butasan );
VIDEO_START( bombsa );
VIDEO_UPDATE( argus );
VIDEO_UPDATE( valtric );
VIDEO_UPDATE( butasan );
VIDEO_UPDATE( bombsa );

static UINT8 argus_bank_latch   = 0x00;
static UINT8 butasan_page_latch = 0x00;

READ8_HANDLER( argus_txram_r );
READ8_HANDLER( butasan_txram_r );
READ8_HANDLER( bombsa_txram_r );
READ8_HANDLER( argus_bg1ram_r );
READ8_HANDLER( butasan_bg0ram_r );
READ8_HANDLER( butasan_bg1ram_r );
READ8_HANDLER( argus_paletteram_r );
READ8_HANDLER( bombsa_paletteram_r );
READ8_HANDLER( butasan_txbackram_r );
READ8_HANDLER( butasan_bg0backram_r );

WRITE8_HANDLER( argus_txram_w );
WRITE8_HANDLER( butasan_txram_w );
WRITE8_HANDLER( bombsa_txram_w );
WRITE8_HANDLER( argus_bg1ram_w );
WRITE8_HANDLER( butasan_bg0ram_w );
WRITE8_HANDLER( butasan_bg1ram_w );
WRITE8_HANDLER( argus_bg0_scrollx_w );
WRITE8_HANDLER( argus_bg0_scrolly_w );
WRITE8_HANDLER( butasan_bg0_scrollx_w );
WRITE8_HANDLER( argus_bg1_scrollx_w );
WRITE8_HANDLER( argus_bg1_scrolly_w );
WRITE8_HANDLER( argus_bg_status_w );
WRITE8_HANDLER( valtric_bg_status_w );
WRITE8_HANDLER( butasan_bg0_status_w );
WRITE8_HANDLER( argus_flipscreen_w );
WRITE8_HANDLER( argus_paletteram_w );
WRITE8_HANDLER( valtric_paletteram_w );
WRITE8_HANDLER( butasan_paletteram_w );
WRITE8_HANDLER( bombsa_paletteram_w );
WRITE8_HANDLER( butasan_txbackram_w );
WRITE8_HANDLER( butasan_bg0backram_w );
WRITE8_HANDLER( butasan_bg1_status_w );
WRITE8_HANDLER( bombsa_pageselect_w );

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

  Interrupt(s)

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

static INTERRUPT_GEN( argus_interrupt )
{
	if (cpu_getiloops() == 0)
	   cpunum_set_input_line_and_vector(0, 0, HOLD_LINE, 0xd7);	/* RST 10h */
	else
	   cpunum_set_input_line_and_vector(0, 0, HOLD_LINE, 0xcf);	/* RST 08h */
}

/* Handler called by the YM2203 emulator when the internal timers cause an IRQ */
static void irqhandler(int irq)
{
	cpunum_set_input_line(1, 0, irq ? ASSERT_LINE : CLEAR_LINE);
}

static struct YM2203interface ym2203_interface =
{
	0,
	0,
	0,
	0,
	irqhandler
};


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

  Memory Handler(s)

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

#if 0
static READ8_HANDLER( argus_bankselect_r )
{
	return argus_bank_latch;
}
#endif

static WRITE8_HANDLER( argus_bankselect_w )
{
	UINT8 *RAM = memory_region(REGION_CPU1);
	int bankaddress;

	argus_bank_latch = data;
	bankaddress = 0x10000 + ((data & 7) * 0x4000);
	memory_set_bankptr(1, &RAM[bankaddress]);	 /* Select 8 banks of 16k */
}

static WRITE8_HANDLER( butasan_pageselect_w )
{
	butasan_page_latch = data;
}

static READ8_HANDLER( butasan_pagedram_r )
{
	if (!(butasan_page_latch & 0x01))
	{
		if (offset < 0x0800)		/* BG0 RAM */
		{
			return butasan_bg0ram_r( offset );
		}
		else if (offset < 0x1000)	/* Back BG0 RAM */
		{
			return butasan_bg0backram_r( offset - 0x0800 );
		}
	}
	else
	{
		if (offset < 0x0800)		/* Text RAM */
		{
			return butasan_txram_r( offset );
		}
		else if (offset < 0x1000)	/* Back text RAM */
		{
			return butasan_txbackram_r( offset - 0x0800 );
		}
	}

	return 0;
}

static WRITE8_HANDLER( butasan_pagedram_w )
{
	if (!(butasan_page_latch & 0x01))
	{
		if (offset < 0x0800)		/* BG0 RAM */
		{
			butasan_bg0ram_w( offset, data );
		}
		else if (offset < 0x1000)	/* Back BG0 RAM */
		{
			butasan_bg0backram_w( offset - 0x0800, data );
		}
	}

	else
	{
		if (offset < 0x0800)		/* Text RAM */
		{
			butasan_txram_w( offset, data );
		}
		else if (offset < 0x1000)	/* Back text RAM */
		{
			butasan_txbackram_w( offset - 0x0800, data );
		}
	}
}


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

  Memory Map(s)

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

static ADDRESS_MAP_START( argus_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_READ(MRA8_BANK1)
	AM_RANGE(0xc000, 0xc000) AM_READ(input_port_0_r)			// Coin
	AM_RANGE(0xc001, 0xc001) AM_READ(input_port_1_r)			// Player 1
	AM_RANGE(0xc002, 0xc002) AM_READ(input_port_2_r)			// Player 2
	AM_RANGE(0xc003, 0xc003) AM_READ(input_port_3_r)			// DSW 1
	AM_RANGE(0xc004, 0xc004) AM_READ(input_port_4_r)			// DSW 2
	AM_RANGE(0xc400, 0xcfff) AM_READ(argus_paletteram_r)
	AM_RANGE(0xd000, 0xd7ff) AM_READ(argus_txram_r)
	AM_RANGE(0xd800, 0xdfff) AM_READ(argus_bg1ram_r)
	AM_RANGE(0xe000, 0xf1ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xf200, 0xf7ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xf800, 0xffff) AM_READ(MRA8_RAM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( argus_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_WRITE(MWA8_BANK1)
	AM_RANGE(0xc200, 0xc200) AM_WRITE(soundlatch_w)
	AM_RANGE(0xc201, 0xc201) AM_WRITE(argus_flipscreen_w)
	AM_RANGE(0xc202, 0xc202) AM_WRITE(argus_bankselect_w)
	AM_RANGE(0xc300, 0xc301) AM_WRITE(argus_bg0_scrollx_w) AM_BASE(&argus_bg0_scrollx)
	AM_RANGE(0xc302, 0xc303) AM_WRITE(argus_bg0_scrolly_w) AM_BASE(&argus_bg0_scrolly)
	AM_RANGE(0xc308, 0xc309) AM_WRITE(argus_bg1_scrollx_w) AM_BASE(&argus_bg1_scrollx)
	AM_RANGE(0xc30a, 0xc30b) AM_WRITE(argus_bg1_scrolly_w) AM_BASE(&argus_bg1_scrolly)
	AM_RANGE(0xc30c, 0xc30c) AM_WRITE(argus_bg_status_w)
	AM_RANGE(0xc400, 0xcfff) AM_WRITE(argus_paletteram_w) AM_BASE(&argus_paletteram)
	AM_RANGE(0xd000, 0xd7ff) AM_WRITE(argus_txram_w) AM_BASE(&argus_txram)
	AM_RANGE(0xd800, 0xdfff) AM_WRITE(argus_bg1ram_w) AM_BASE(&argus_bg1ram)
	AM_RANGE(0xe000, 0xf1ff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0xf200, 0xf7ff) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) AM_SIZE(&spriteram_size)
	AM_RANGE(0xf800, 0xffff) AM_WRITE(MWA8_RAM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( valtric_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_READ(MRA8_BANK1)
	AM_RANGE(0xc000, 0xc000) AM_READ(input_port_0_r)			// Coin
	AM_RANGE(0xc001, 0xc001) AM_READ(input_port_1_r)			// Player 1
	AM_RANGE(0xc002, 0xc002) AM_READ(input_port_2_r)			// Player 2
	AM_RANGE(0xc003, 0xc003) AM_READ(input_port_3_r)			// DSW 1
	AM_RANGE(0xc004, 0xc004) AM_READ(input_port_4_r)			// DSW 2
	AM_RANGE(0xc400, 0xcfff) AM_READ(argus_paletteram_r)
	AM_RANGE(0xd000, 0xd7ff) AM_READ(argus_txram_r)
	AM_RANGE(0xd800, 0xdfff) AM_READ(argus_bg1ram_r)
	AM_RANGE(0xe000, 0xf1ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xf200, 0xf7ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xf800, 0xffff) AM_READ(MRA8_RAM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( valtric_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_WRITE(MWA8_BANK1)
	AM_RANGE(0xc200, 0xc200) AM_WRITE(soundlatch_w)
	AM_RANGE(0xc201, 0xc201) AM_WRITE(argus_flipscreen_w)
	AM_RANGE(0xc202, 0xc202) AM_WRITE(argus_bankselect_w)
	AM_RANGE(0xc308, 0xc309) AM_WRITE(argus_bg1_scrollx_w) AM_BASE(&argus_bg1_scrollx)
	AM_RANGE(0xc30a, 0xc30b) AM_WRITE(argus_bg1_scrolly_w) AM_BASE(&argus_bg1_scrolly)
	AM_RANGE(0xc30c, 0xc30c) AM_WRITE(valtric_bg_status_w)
	AM_RANGE(0xc400, 0xcfff) AM_WRITE(valtric_paletteram_w) AM_BASE(&argus_paletteram)
	AM_RANGE(0xd000, 0xd7ff) AM_WRITE(argus_txram_w) AM_BASE(&argus_txram)
	AM_RANGE(0xd800, 0xdfff) AM_WRITE(argus_bg1ram_w) AM_BASE(&argus_bg1ram)
	AM_RANGE(0xe000, 0xf1ff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0xf200, 0xf7ff) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) AM_SIZE(&spriteram_size)
	AM_RANGE(0xf800, 0xffff) AM_WRITE(MWA8_RAM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( butasan_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_READ(MRA8_BANK1)
	AM_RANGE(0xc000, 0xc000) AM_READ(input_port_0_r)			// Coin
	AM_RANGE(0xc001, 0xc001) AM_READ(input_port_1_r)			// Player 1
	AM_RANGE(0xc002, 0xc002) AM_READ(input_port_2_r)			// Player 2
	AM_RANGE(0xc003, 0xc003) AM_READ(input_port_3_r)			// DSW 1
	AM_RANGE(0xc004, 0xc004) AM_READ(input_port_4_r)			// DSW 2
	AM_RANGE(0xc400, 0xc7ff) AM_READ(butasan_bg1ram_r)
	AM_RANGE(0xc800, 0xcfff) AM_READ(argus_paletteram_r)
	AM_RANGE(0xd000, 0xdfff) AM_READ(butasan_pagedram_r)
	AM_RANGE(0xe000, 0xefff) AM_READ(MRA8_RAM)
	AM_RANGE(0xf000, 0xf67f) AM_READ(MRA8_RAM)
	AM_RANGE(0xf680, 0xffff) AM_READ(MRA8_RAM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( butasan_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_WRITE(MWA8_BANK1)
	AM_RANGE(0xc200, 0xc200) AM_WRITE(soundlatch_w)
	AM_RANGE(0xc201, 0xc201) AM_WRITE(argus_flipscreen_w)
	AM_RANGE(0xc202, 0xc202) AM_WRITE(argus_bankselect_w)
	AM_RANGE(0xc203, 0xc203) AM_WRITE(butasan_pageselect_w)
	AM_RANGE(0xc300, 0xc301) AM_WRITE(butasan_bg0_scrollx_w) AM_BASE(&argus_bg0_scrollx)
	AM_RANGE(0xc302, 0xc303) AM_WRITE(argus_bg0_scrolly_w) AM_BASE(&argus_bg0_scrolly)
	AM_RANGE(0xc304, 0xc304) AM_WRITE(butasan_bg0_status_w)
	AM_RANGE(0xc308, 0xc309) AM_WRITE(argus_bg1_scrollx_w) AM_BASE(&argus_bg1_scrollx)
	AM_RANGE(0xc30a, 0xc30b) AM_WRITE(argus_bg1_scrolly_w) AM_BASE(&argus_bg1_scrolly)
	AM_RANGE(0xc30c, 0xc30c) AM_WRITE(butasan_bg1_status_w)
	AM_RANGE(0xc400, 0xc7ff) AM_WRITE(butasan_bg1ram_w) AM_BASE(&butasan_bg1ram)
	AM_RANGE(0xc800, 0xcfff) AM_WRITE(butasan_paletteram_w) AM_BASE(&argus_paletteram)
	AM_RANGE(0xd000, 0xdfff) AM_WRITE(butasan_pagedram_w)
	AM_RANGE(0xe000, 0xefff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0xf000, 0xf67f) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) AM_SIZE(&spriteram_size)
	AM_RANGE(0xf680, 0xffff) AM_WRITE(MWA8_RAM)
ADDRESS_MAP_END

WRITE8_HANDLER( bombsa_txram_w );
READ8_HANDLER( bombsa_txram_r );

static ADDRESS_MAP_START( bombsa_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_READ(MRA8_BANK1)

	AM_RANGE(0xc000, 0xcfff) AM_READ(MRA8_RAM)

	AM_RANGE(0xd000, 0xd1ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xd200, 0xd7ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xd800, 0xdfff) AM_READ(MRA8_RAM)
	/* Input ports */
	AM_RANGE(0xe000, 0xe000) AM_READ(input_port_0_r)					// Coin
	AM_RANGE(0xe001, 0xe001) AM_READ(input_port_1_r)					// Player 1
	AM_RANGE(0xe002, 0xe002) AM_READ(input_port_2_r)					// Player 2
	AM_RANGE(0xe003, 0xe003) AM_READ(input_port_3_r)					// DSW 1
	AM_RANGE(0xe004, 0xe004) AM_READ(input_port_4_r)					// DSW 2

	AM_RANGE(0xe800, 0xefff) AM_READ(bombsa_txram_r)
	AM_RANGE(0xf000, 0xffff) AM_READ(bombsa_paletteram_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( bombsa_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM)
	AM_RANGE(0x8000, 0xbfff) AM_WRITE(MWA8_BANK1)

	AM_RANGE(0xc000, 0xcfff) AM_WRITE(MWA8_RAM)

	/* ports look like the other games */
	AM_RANGE(0xd000, 0xd000) AM_WRITE(soundlatch_w) // confirmed
//  AM_RANGE(0xd001, 0xd001) AM_WRITE(argus_flipscreen_w)
	AM_RANGE(0xd002, 0xd002) AM_WRITE(argus_bankselect_w)
	AM_RANGE(0xd003, 0xd003) AM_WRITE(bombsa_pageselect_w) // 0,1,0,1,0,1 etc.

	AM_RANGE(0xd000, 0xd1ff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0xd200, 0xd7ff) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) AM_SIZE(&spriteram_size)
	AM_RANGE(0xd800, 0xdfff) AM_WRITE(MWA8_RAM)

	AM_RANGE(0xe000, 0xe7ff) AM_WRITE(MWA8_RAM) // ??
	AM_RANGE(0xe800, 0xefff) AM_WRITE(bombsa_txram_w) AM_BASE(&argus_txram) // banked? it gets corrupted at game start, maybe its banked and one layer can be 16x16 or 8x8?
	AM_RANGE(0xf000, 0xffff) AM_WRITE(bombsa_paletteram_w) AM_BASE(&argus_paletteram) // banked?
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_readmem_a, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM)
	AM_RANGE(0x8000, 0x87ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xc000, 0xc000) AM_READ(soundlatch_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_writemem_a, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM)
	AM_RANGE(0x8000, 0x87ff) AM_WRITE(MWA8_RAM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_readmem_b, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xbfff) AM_READ(MRA8_ROM)
	AM_RANGE(0xc000, 0xc7ff) AM_READ(MRA8_RAM)
	AM_RANGE(0xe000, 0xe000) AM_READ(soundlatch_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_writemem_b, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xbfff) AM_WRITE(MWA8_ROM)
	AM_RANGE(0xc000, 0xc7ff) AM_WRITE(MWA8_RAM)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_writemem_c, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xbfff) AM_WRITE(MWA8_ROM)
	AM_RANGE(0xc000, 0xc7ff) AM_WRITE(MWA8_RAM)
	AM_RANGE(0xf000, 0xf000) AM_WRITE(MWA8_RAM)							// Is this a confirm of some sort?
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_readport_1, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
	AM_RANGE(0x00, 0x00) AM_READ(YM2203_status_port_0_r)
	AM_RANGE(0x01, 0x01) AM_READ(YM2203_read_port_0_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_writeport_1, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
	AM_RANGE(0x00, 0x00) AM_WRITE(YM2203_control_port_0_w)
	AM_RANGE(0x01, 0x01) AM_WRITE(YM2203_write_port_0_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_readport_2, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
	AM_RANGE(0x00, 0x00) AM_READ(YM2203_status_port_0_r)
	AM_RANGE(0x01, 0x01) AM_READ(YM2203_read_port_0_r)
	AM_RANGE(0x80, 0x80) AM_READ(YM2203_status_port_1_r)
	AM_RANGE(0x81, 0x81) AM_READ(YM2203_read_port_1_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_writeport_2, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
	AM_RANGE(0x00, 0x00) AM_WRITE(YM2203_control_port_0_w)
	AM_RANGE(0x01, 0x01) AM_WRITE(YM2203_write_port_0_w)
	AM_RANGE(0x80, 0x80) AM_WRITE(YM2203_control_port_1_w)
	AM_RANGE(0x81, 0x81) AM_WRITE(YM2203_write_port_1_w)
ADDRESS_MAP_END


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

  Input Port(s)

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

#define ARGUS_IN0\
	PORT_START_TAG("IN0")\
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )\
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )\
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )\
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )\
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )\
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )\
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )\
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )

#define ARGUS_IN1 \
	PORT_START_TAG("IN1") \
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY\
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY\
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY\
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY\
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )\
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )\
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )\
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

#define ARGUS_IN2\
	PORT_START_TAG("IN2")\
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL\
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL\
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL\
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL\
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL\
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL\
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )\
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

#define ARGUS_DSW1\
	PORT_START_TAG("DSW1")\
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Flip_Screen ) )\
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )\
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )\
	PORT_DIPNAME( 0x06, 0x06, DEF_STR( Difficulty ) )\
	PORT_DIPSETTING(    0x04, DEF_STR( Easy ) )\
	PORT_DIPSETTING(    0x06, DEF_STR( Medium ) )\
	PORT_DIPSETTING(    0x02, DEF_STR( Hard ) )\
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )\
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Free_Play ) )\
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )\
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )\
	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Cabinet) )\
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )\
	PORT_DIPSETTING(    0x10, DEF_STR( Cocktail ) )\
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Demo_Sounds ) )\
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )\
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )\
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Lives ) )\
	PORT_DIPSETTING(    0x80, "2" )\
	PORT_DIPSETTING(    0xc0, "3" )\
	PORT_DIPSETTING(    0x40, "4" )\
	PORT_DIPSETTING(    0x00, "5" )


INPUT_PORTS_START( argus )
	ARGUS_IN0 /* System control */

	ARGUS_IN1 /* Player 1 control */

	ARGUS_IN2 /* Player 2 control */

	ARGUS_DSW1

	PORT_START_TAG("DSW2")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x1c, 0x1c, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x0C, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x1C, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x14, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_4C ) )
	PORT_DIPNAME( 0xe0, 0xe0, DEF_STR( Coin_A) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_4C ) )
INPUT_PORTS_END

INPUT_PORTS_START( valtric )

	ARGUS_IN0

	ARGUS_IN1

	ARGUS_IN2

	ARGUS_DSW1

	PORT_START_TAG("DSW2")
	PORT_DIPNAME( 0x01, 0x01, "Invulnerability (Cheat")
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x1c, 0x1c, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x0C, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x1C, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x14, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_4C ) )
	PORT_DIPNAME( 0xe0, 0xe0, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_4C ) )
INPUT_PORTS_END

INPUT_PORTS_START( butasan )
	PORT_START_TAG("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_SERVICE( 0x20,	IP_ACTIVE_LOW )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )

	ARGUS_IN1

	ARGUS_IN2

	PORT_START_TAG("DSW1")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Free_Play ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, "Invulnerability (Cheat)")
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x0c, "3" )
	PORT_DIPSETTING(    0x08, "4" )
	PORT_DIPSETTING(    0x04, "5" )
	PORT_DIPSETTING(    0x00, "6" )
	PORT_DIPNAME( 0x30, 0x30, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x30, "Rank 1 (Medium)" )
	PORT_DIPSETTING(    0x20, "Rank 2" )
	PORT_DIPSETTING(    0x10, "Rank 3" )
	PORT_DIPSETTING(    0x00, "Rank 4" )
	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_TAG("DSW2")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x1c, 0x1c, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x1c, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x14, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_4C ) )
	PORT_DIPNAME( 0xe0, 0xe0, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_4C ) )
INPUT_PORTS_END

INPUT_PORTS_START( bombsa )

	PORT_START_TAG("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20,	IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )

	ARGUS_IN1

	ARGUS_IN2

	PORT_START_TAG("DSW1")
	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, 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(   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 ) )

	PORT_START_TAG("DSW2")
    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, 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(   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

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

  Machine Driver(s)

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

static const gfx_layout charlayout =
{
	8,8,    /* 8x8 characters */
	1024,	/* 1024 characters */
	4,      /* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0, 4, 8, 12, 16, 20, 24, 28 },
	{ 0*8, 4*8, 8*8, 12*8, 16*8, 20*8, 24*8, 28*8 },
	32*8
};

static const gfx_layout tilelayout_256 =
{
	16,16,  /* 16x16 characters */
	256,	/* 256 characters */
	4,      /* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0, 4, 8, 12, 16, 20, 24, 28,
		64*8, 64*8+4, 64*8+8, 64*8+12, 64*8+16, 64*8+20, 64*8+24, 64*8+28 },
	{ 0*8, 4*8, 8*8, 12*8, 16*8, 20*8, 24*8, 28*8,
		32*8, 36*8, 40*8, 44*8, 48*8, 52*8, 56*8, 60*8 },
	128*8
};

static const gfx_layout tilelayout_512 =
{
	16,16,  /* 16x16 characters */
	512,	/* 512 characters */
	4,      /* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0, 4, 8, 12, 16, 20, 24, 28,
		64*8, 64*8+4, 64*8+8, 64*8+12, 64*8+16, 64*8+20, 64*8+24, 64*8+28 },
	{ 0*8, 4*8, 8*8, 12*8, 16*8, 20*8, 24*8, 28*8,
		32*8, 36*8, 40*8, 44*8, 48*8, 52*8, 56*8, 60*8 },
	128*8
};

static const gfx_layout tilelayout_1024 =
{
	16,16,  /* 16x16 characters */
	1024,	/* 1024 characters */
	4,      /* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0, 4, 8, 12, 16, 20, 24, 28,
		64*8, 64*8+4, 64*8+8, 64*8+12, 64*8+16, 64*8+20, 64*8+24, 64*8+28 },
	{ 0*8, 4*8, 8*8, 12*8, 16*8, 20*8, 24*8, 28*8,
		32*8, 36*8, 40*8, 44*8, 48*8, 52*8, 56*8, 60*8 },
	128*8
};

static const gfx_layout tilelayout_2048 =
{
	16,16,  /* 16x16 characters */
	2048,	/* 2048 characters */
	4,      /* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0, 4, 8, 12, 16, 20, 24, 28,
		64*8, 64*8+4, 64*8+8, 64*8+12, 64*8+16, 64*8+20, 64*8+24, 64*8+28 },
	{ 0*8, 4*8, 8*8, 12*8, 16*8, 20*8, 24*8, 28*8,
		32*8, 36*8, 40*8, 44*8, 48*8, 52*8, 56*8, 60*8 },
	128*8
};

static const gfx_layout tilelayout_4096 =
{
	16,16,  /* 16x16 characters */
	4096,	/* 4096 characters */
	4,      /* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0, 4, 8, 12, 16, 20, 24, 28,
		64*8, 64*8+4, 64*8+8, 64*8+12, 64*8+16, 64*8+20, 64*8+24, 64*8+28 },
	{ 0*8, 4*8, 8*8, 12*8, 16*8, 20*8, 24*8, 28*8,
		32*8, 36*8, 40*8, 44*8, 48*8, 52*8, 56*8, 60*8 },
	128*8
};

static const gfx_decode argus_gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &tilelayout_1024, 0*16,   8 },
	{ REGION_GFX2, 0, &tilelayout_1024, 8*16,  16 },
	{ REGION_GFX3, 0, &tilelayout_256,  24*16, 16 },
	{ REGION_GFX4, 0, &charlayout,      40*16, 16 },
	{ -1 } /* end of array */
};

static const gfx_decode valtric_gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &tilelayout_1024, 0*16, 16 },
	{ REGION_GFX2, 0, &tilelayout_2048, 16*16, 16 },
	{ REGION_GFX3, 0, &charlayout,      32*16, 16 },
	{ -1 } /* end of array */
};

static const gfx_decode butasan_gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &tilelayout_4096, 0*16,  16 },
	{ REGION_GFX2, 0, &tilelayout_1024, 16*16, 16 },
	{ REGION_GFX3, 0, &tilelayout_512,  12*16, 16 },
	{ REGION_GFX4, 0, &charlayout,      32*16, 16 },
	{ -1 } /* end of array */
};

static const gfx_decode bombsa_gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &tilelayout_1024, 32*16, 16 },
	{ REGION_GFX2, 0, &tilelayout_1024, 0*16, 16 },
	{ REGION_GFX3, 0, &charlayout,      16*16, 16 },
	{ -1 } /* end of array */
};

static MACHINE_DRIVER_START( argus )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z80, 5000000)			/* 4 MHz */
	MDRV_CPU_PROGRAM_MAP(argus_readmem,argus_writemem)
	MDRV_CPU_VBLANK_INT(argus_interrupt,2)

	MDRV_CPU_ADD(Z80, 5000000)
	/* audio CPU */			/* 4 MHz */
	MDRV_CPU_PROGRAM_MAP(sound_readmem_a,sound_writemem_a)
	MDRV_CPU_IO_MAP(sound_readport_1,sound_writeport_1)

	MDRV_FRAMES_PER_SECOND(54)
	MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)	/* This value is refered to psychic5 driver */
	MDRV_INTERLEAVE(10)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_NEEDS_6BITS_PER_GUN | VIDEO_RGB_DIRECT)
	MDRV_SCREEN_SIZE(32*16, 32*16)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
	MDRV_GFXDECODE(argus_gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(896)

	MDRV_VIDEO_START(argus)
	MDRV_VIDEO_UPDATE(argus)

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

	MDRV_SOUND_ADD(YM2203, 6000000 / 4)
	MDRV_SOUND_CONFIG(ym2203_interface)
	MDRV_SOUND_ROUTE(0, "mono", 0.15)
	MDRV_SOUND_ROUTE(1, "mono", 0.15)
	MDRV_SOUND_ROUTE(2, "mono", 0.15)
	MDRV_SOUND_ROUTE(3, "mono", 0.50)
MACHINE_DRIVER_END

static MACHINE_DRIVER_START( valtric )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z80, 5000000)			/* 5 MHz */
	MDRV_CPU_PROGRAM_MAP(valtric_readmem,valtric_writemem)
	MDRV_CPU_VBLANK_INT(argus_interrupt,2)

	MDRV_CPU_ADD(Z80, 5000000)
	/* audio CPU */			/* 5 MHz */
	MDRV_CPU_PROGRAM_MAP(sound_readmem_a,sound_writemem_a)
	MDRV_CPU_IO_MAP(sound_readport_2,sound_writeport_2)

	MDRV_FRAMES_PER_SECOND(54)
	MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)	/* This value is refered to psychic5 driver */
	MDRV_INTERLEAVE(10)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_NEEDS_6BITS_PER_GUN | VIDEO_RGB_DIRECT)
	MDRV_SCREEN_SIZE(32*16, 32*16)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
	MDRV_GFXDECODE(valtric_gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(768)

	MDRV_VIDEO_START(valtric)
	MDRV_VIDEO_UPDATE(valtric)

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

	MDRV_SOUND_ADD(YM2203, 6000000 / 4)
	MDRV_SOUND_CONFIG(ym2203_interface)
	MDRV_SOUND_ROUTE(0, "mono", 0.15)
	MDRV_SOUND_ROUTE(1, "mono", 0.15)
	MDRV_SOUND_ROUTE(2, "mono", 0.15)
	MDRV_SOUND_ROUTE(3, "mono", 0.50)

	MDRV_SOUND_ADD(YM2203, 6000000 / 4)
	MDRV_SOUND_ROUTE(0, "mono", 0.15)
	MDRV_SOUND_ROUTE(1, "mono", 0.15)
	MDRV_SOUND_ROUTE(2, "mono", 0.15)
	MDRV_SOUND_ROUTE(3, "mono", 0.50)
MACHINE_DRIVER_END

static MACHINE_DRIVER_START( butasan )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z80, 5000000)			/* 5 MHz */
	MDRV_CPU_PROGRAM_MAP(butasan_readmem,butasan_writemem)
	MDRV_CPU_VBLANK_INT(argus_interrupt,2)

	MDRV_CPU_ADD(Z80, 5000000)
	/* audio CPU */			/* 5 MHz */
	MDRV_CPU_PROGRAM_MAP(sound_readmem_b,sound_writemem_b)
	MDRV_CPU_IO_MAP(sound_readport_2,sound_writeport_2)

	MDRV_FRAMES_PER_SECOND(54)
	MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)	/* This value is taken from psychic5 driver */
	MDRV_INTERLEAVE(10)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_NEEDS_6BITS_PER_GUN | VIDEO_RGB_DIRECT)
	MDRV_SCREEN_SIZE(32*16, 32*16)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 1*8, 31*8-1)
	MDRV_GFXDECODE(butasan_gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(768)

	MDRV_VIDEO_START(butasan)
	MDRV_VIDEO_UPDATE(butasan)

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

	MDRV_SOUND_ADD(YM2203, 6000000 / 4)
	MDRV_SOUND_CONFIG(ym2203_interface)
	MDRV_SOUND_ROUTE(0, "mono", 0.30)
	MDRV_SOUND_ROUTE(1, "mono", 0.30)
	MDRV_SOUND_ROUTE(2, "mono", 0.30)
	MDRV_SOUND_ROUTE(3, "mono", 1.0)

	MDRV_SOUND_ADD(YM2203, 6000000 / 4)
	MDRV_SOUND_ROUTE(0, "mono", 0.30)
	MDRV_SOUND_ROUTE(1, "mono", 0.30)
	MDRV_SOUND_ROUTE(2, "mono", 0.30)
	MDRV_SOUND_ROUTE(3, "mono", 1.0)
MACHINE_DRIVER_END

static MACHINE_DRIVER_START( bombsa )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z80, 5000000)			/* 5 MHz */
	MDRV_CPU_PROGRAM_MAP(bombsa_readmem,bombsa_writemem)
	MDRV_CPU_VBLANK_INT(argus_interrupt,2)

	MDRV_CPU_ADD(Z80, 12000000 / 2)
	/* audio CPU */						/* 6 MHz */				/* maybe CPU speeds are reversed? Probably not (ajg) */
	MDRV_CPU_PROGRAM_MAP(sound_readmem_b,sound_writemem_c)
	MDRV_CPU_IO_MAP(sound_readport_2,sound_writeport_2)

	MDRV_FRAMES_PER_SECOND(54)									/* Guru says : VSync - 54Hz . HSync - 15.25kHz */
	MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)
	MDRV_INTERLEAVE(10)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_SIZE(32*16, 32*16)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
	MDRV_GFXDECODE(bombsa_gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(0x1000/2)

	MDRV_VIDEO_START(bombsa)
	MDRV_VIDEO_UPDATE(bombsa)

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

	MDRV_SOUND_ADD(YM2203, 12000000 / 8)
	MDRV_SOUND_CONFIG(ym2203_interface)
	MDRV_SOUND_ROUTE(0, "mono", 0.30)
	MDRV_SOUND_ROUTE(1, "mono", 0.30)
	MDRV_SOUND_ROUTE(2, "mono", 0.30)
	MDRV_SOUND_ROUTE(3, "mono", 1.0)

	MDRV_SOUND_ADD(YM2203, 12000000 / 8)
	MDRV_SOUND_ROUTE(0, "mono", 0.30)
	MDRV_SOUND_ROUTE(1, "mono", 0.30)
	MDRV_SOUND_ROUTE(2, "mono", 0.30)
	MDRV_SOUND_ROUTE(3, "mono", 1.0)
MACHINE_DRIVER_END


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

  Game driver(s)

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

ROM_START( argus )
	ROM_REGION( 0x28000, REGION_CPU1, 0 ) 					/* Main CPU */
	ROM_LOAD( "ag_02.bin", 0x00000, 0x08000, CRC(278a3f3d) SHA1(c5ac5a004ebf0194c33f71dab4020fa636cefbc2) )
	ROM_LOAD( "ag_03.bin", 0x10000, 0x08000, CRC(3a7f3bfa) SHA1(b11e134c084fc3c982dfe31836c1cf3fc0d481fd) )
	ROM_LOAD( "ag_04.bin", 0x18000, 0x08000, CRC(76adc9f6) SHA1(e223a8b2371c51f121958ee3687c777f597334c9) )
	ROM_LOAD( "ag_05.bin", 0x20000, 0x08000, CRC(f76692d6) SHA1(1dc353a042cdda909eb9f1b1ca749a3b3eaa01e4) )

	ROM_REGION( 0x10000, REGION_CPU2, 0 )					/* Sound CPU */
	ROM_LOAD( "ag_01.bin", 0x00000, 0x04000, CRC(769e3f57) SHA1(209160a96486ab0b90967c015143ec28fba2e2a4) )

	ROM_REGION( 0x20000, REGION_GFX1, ROMREGION_DISPOSE )	/* Sprite */
	ROM_LOAD( "ag_09.bin", 0x00000, 0x08000, CRC(6dbc1c58) SHA1(ef7b6901b702dd347b3a3f162162138175efe578) )
	ROM_LOAD( "ag_08.bin", 0x08000, 0x08000, CRC(ce6e987e) SHA1(9de257d8061ec917f4d443ff509fd457f995d73b) )
	ROM_LOAD( "ag_07.bin", 0x10000, 0x08000, CRC(bbb9638d) SHA1(61dec71d4d976bef3af26d0dc9c0355fd1098ffb) )
	ROM_LOAD( "ag_06.bin", 0x18000, 0x08000, CRC(655b48f8) SHA1(4fce1dffe091b97e7055955743434e49e97b4b79) )

	ROM_REGION( 0x20000, REGION_GFX2, ROMREGION_DISPOSE )	/* BG0 */
	ROM_LOAD( "ag_13.bin", 0x00000, 0x08000, CRC(20274268) SHA1(9b7767d14bd169dabe6add0623d353bf4b59779b) )
	ROM_LOAD( "ag_14.bin", 0x08000, 0x08000, CRC(ceb8860b) SHA1(90e094686d9d18e49e4848d18d1e31ac95f13937) )
	ROM_LOAD( "ag_11.bin", 0x10000, 0x08000, CRC(99ce8556) SHA1(39caababd6e20ecb0375b85fb6490ee0b04f0949) )
	ROM_LOAD( "ag_12.bin", 0x18000, 0x08000, CRC(e0e5377c) SHA1(b5981d832127d0b28b6a7bb0437716593e0ed71a) )

	ROM_REGION( 0x08000, REGION_GFX3, ROMREGION_DISPOSE )	/* BG1 */
	ROM_LOAD( "ag_17.bin", 0x00000, 0x08000, CRC(0f12d09b) SHA1(718db4ff016526dddacdf6f0088f247ee97c6543) )

	ROM_REGION( 0x08000, REGION_GFX4, ROMREGION_DISPOSE )	/* Text */
	ROM_LOAD( "ag_10.bin", 0x00000, 0x04000, CRC(2de696c4) SHA1(1ad0f1cde127a1618c2ea74a53e522963a79e5ce) )

	ROM_REGION( 0x08000, REGION_USER1, 0 )					/* Map */
	ROM_LOAD( "ag_15.bin", 0x00000, 0x08000, CRC(99834c1b) SHA1(330f271771b158493b28bb178c8cda98efd1d90c) )

	ROM_REGION( 0x08000, REGION_USER2, 0 )					/* Pattern */
	ROM_LOAD( "ag_16.bin", 0x00000, 0x08000, CRC(39a51714) SHA1(ad89a630f1352eb4d8beeeebf909d5e2b5d7cc12) )
ROM_END

ROM_START( valtric )
	ROM_REGION( 0x30000, REGION_CPU1, 0 ) 					/* Main CPU */
	ROM_LOAD( "vt_04.bin",    0x00000, 0x08000, CRC(709c705f) SHA1(b82e2209a0371dcbc2708c485b02985cea04353f) )
	ROM_LOAD( "vt_06.bin",    0x10000, 0x10000, CRC(c9cbb4e4) SHA1(3c84cda778263a9bb2031e29f6f29f29878d2070) )
	ROM_LOAD( "vt_05.bin",    0x20000, 0x10000, CRC(7ab2684b) SHA1(9bca7e2fd3b5f4043de37cd439d5235957e5012f) )

	ROM_REGION( 0x10000, REGION_CPU2, 0 )					/* Sound CPU */
	ROM_LOAD( "vt_01.bin",    0x00000, 0x08000, CRC(4616484f) SHA1(24d060218cc1542ebfc2100ecd6489a0e17b36ee) )

	ROM_REGION( 0x20000, REGION_GFX1, ROMREGION_DISPOSE )	/* Sprite */
	ROM_LOAD( "vt_02.bin",    0x00000, 0x10000, CRC(66401977) SHA1(91c527d0bcea54d723068715a12cb3c976d04294) )
	ROM_LOAD( "vt_03.bin",    0x10000, 0x10000, CRC(9203bbce) SHA1(f40cee48f62a87a0b5d18e271faa5b8dd36ae5f1) )

	ROM_REGION( 0x40000, REGION_GFX2, ROMREGION_DISPOSE )	/* BG */
	ROM_LOAD( "vt_08.bin",    0x00000, 0x10000, CRC(661dd338) SHA1(cc643a14607c10e4a1710766f77422cd89a6bf94) )
	ROM_LOAD( "vt_09.bin",    0x10000, 0x10000, CRC(085a35b1) SHA1(ff589e67b6b5a6e661f29294a32a3840f45a9304) )
	ROM_LOAD( "vt_10.bin",    0x20000, 0x10000, CRC(09c47323) SHA1(fcfbd5054e63fae00b6a3959228964ac8f3cbf37) )
	ROM_LOAD( "vt_11.bin",    0x30000, 0x10000, CRC(4cf800b5) SHA1(7241e284b15475d8a6d533e4caadd0acbf058231) )

	ROM_REGION( 0x08000, REGION_GFX3, ROMREGION_DISPOSE )	/* Text */
	ROM_LOAD( "vt_07.bin",    0x00000, 0x08000, CRC(d5f9bfb9) SHA1(6b3f11f9b8f76c0144a109f1506d8cbb01876237) )
ROM_END

ROM_START( butasan )
	ROM_REGION( 0x30000, REGION_CPU1, 0 ) 					/* Main CPU */
	ROM_LOAD( "buta-04.bin",  0x00000, 0x08000, CRC(47ff4ca9) SHA1(d89a41f6987c91d20b010f0cbda332cf54b21f8c) )
	ROM_LOAD( "buta-03.bin",  0x10000, 0x10000, CRC(69fd88c7) SHA1(fd827d7926a2de5ffe2982b3a59ea43de00ee46b) )
	ROM_LOAD( "buta-02.bin",  0x20000, 0x10000, CRC(519dc412) SHA1(48bbb01b217bd19c48ef7ab12c60805aaa02527c) )

	ROM_REGION( 0x10000, REGION_CPU2, 0 )					/* Sound CPU */
	ROM_LOAD( "buta-01.bin",  0x00000, 0x10000, CRC(c9d23e2d) SHA1(cee289d5bf7626fc35808a09f9f1f4628fa16974) )

	ROM_REGION( 0x80000, REGION_GFX1, ROMREGION_DISPOSE )	/* Sprite */
	ROM_LOAD( "buta-16.bin",  0x00000, 0x10000, CRC(e0ce51b6) SHA1(458c7c422a7b6ce42f397a8868610f6386fd815c) )
	ROM_LOAD( "buta-15.bin",  0x10000, 0x10000, CRC(3ed19daa) SHA1(b8090c3baa2b31681bed15c682a97c024e229df7) )
	ROM_LOAD( "buta-14.bin",  0x20000, 0x10000, CRC(8ec891c1) SHA1(e16f18a0eed300752af8f07fd3cef5cd825a2a05) )
	ROM_LOAD( "buta-13.bin",  0x30000, 0x10000, CRC(5023e74d) SHA1(edf43e6c89f0e537cebf1c21a671dba4cd7d91ea) )
	ROM_LOAD( "buta-12.bin",  0x40000, 0x10000, CRC(44f59905) SHA1(bf364f7f907fee551e9228db7c27c106bcfecf6c) )
	ROM_LOAD( "buta-11.bin",  0x50000, 0x10000, CRC(b8929f1d) SHA1(18a72f30284bed0c6723105f87eb10d64d3f461d) )
	ROM_LOAD( "buta-10.bin",  0x60000, 0x10000, CRC(fd4d3baf) SHA1(fa8e3970a8aac83efcb669fe5d4683adade9aa4f) )
	ROM_LOAD( "buta-09.bin",  0x70000, 0x10000, CRC(7da4c0fd) SHA1(fb2b148ccfee530313da886eddf7711ee83b4aeb) )

	ROM_REGION( 0x20000, REGION_GFX2, ROMREGION_DISPOSE )	/* BG0 */
	ROM_LOAD( "buta-05.bin",  0x00000, 0x10000, CRC(b8e026b0) SHA1(eb6ff9042b21b7190000c571ccba7d81f11ce9f1) )
	ROM_LOAD( "buta-06.bin",  0x10000, 0x10000, CRC(8bbacb81) SHA1(015be76e44ed2389eff912d8f61a757667d7670b) )

	ROM_REGION( 0x10000, REGION_GFX3, ROMREGION_DISPOSE )	/* BG1 */
	ROM_LOAD( "buta-07.bin",  0x00000, 0x10000, CRC(3a48d531) SHA1(0ff6256bb7ea909d95b2bfb994ebc5432ea6d055) )

	ROM_REGION( 0x08000, REGION_GFX4, ROMREGION_DISPOSE )	/* Text */
	ROM_LOAD( "buta-08.bin",  0x00000, 0x08000, CRC(5d45ce9c) SHA1(113c3e7ce20634ee4bb740705485572583298694) )

	ROM_REGION( 0x00200, REGION_PROMS, 0 )					/* Data proms ??? */
	ROM_LOAD( "buta-01.prm",  0x00000, 0x00100, CRC(45baedd0) SHA1(afdafb67d55007e6fb99518657e27ce61d2cb7e6) )
	ROM_LOAD( "buta-02.prm",  0x00100, 0x00100, CRC(0dcb18fc) SHA1(0b097b873c9484981f87a5e3d1af767f901ae05f) )
ROM_END

ROM_START( bombsa )
	ROM_REGION( 0x30000, REGION_CPU1, 0 )					/* Main CPU */
	ROM_LOAD( "4.7a", 0x00000, 0x08000, CRC(0191f6a7) SHA1(10a0434abbf4be068751e65c81b1a211729e3742) )
	/* these fail their self-test... should be checked on real hw (hold start1+start2 on boot) */
	ROM_LOAD( "5.7c", 0x10000, 0x08000, BAD_DUMP CRC(095c451a) SHA1(892ca84376f89640ad4d28f1e548c26bc8f72c0e) ) // contains palettes etc. but fails rom check??
	ROM_LOAD( "6.7d", 0x20000, 0x10000, BAD_DUMP CRC(89f9dc0f) SHA1(5cf6a7aade3d56bc229d3771bc4141ad0c0e8da2) )

	ROM_REGION( 0x10000, REGION_CPU2, 0 )					/* Sound CPU */
	ROM_LOAD( "1.3a", 0x00000, 0x08000, CRC(92801404) SHA1(c4ff47989d355b18a909eaa88f138e2f68178ecc) )

	ROM_REGION( 0x20000, REGION_GFX1, ROMREGION_DISPOSE )	/* Sprite */
	ROM_LOAD( "2.4p", 0x00000, 0x10000, CRC(bd972ff4) SHA1(63bfb455bc0ae1d31e6f1066864ec0c8d2d0cf99) )
	ROM_LOAD( "3.4s", 0x10000, 0x10000, CRC(9a8a8a97) SHA1(13328631202c196c9d8791cc6063048eb6be0472) )

	ROM_REGION( 0x20000, REGION_GFX2, ROMREGION_DISPOSE )	/* BG0 */
	/* some corrupt 'blank' characters, should also be checked with a redump */
	ROM_LOAD( "8.2l", 0x00000, 0x10000, BAD_DUMP CRC(3391c769) SHA1(7ae7575ac81d6e0d915c279c1f57a9bc6d096bd6) )
	ROM_LOAD( "9.2m", 0x10000, 0x10000, BAD_DUMP CRC(5b315976) SHA1(d17cc1926f926bdd88b66ea6af88dac30880e7d4) )

	ROM_REGION( 0x08000, REGION_GFX3, ROMREGION_DISPOSE )	/* Text */
	ROM_LOAD( "7.4f", 0x00000, 0x08000, CRC(400114b9) SHA1(db2f3ba05a2005ae0e0e7d19c8739353032cbeab) )

	ROM_REGION( 0x08000, REGION_USER1, ROMREGION_DISPOSE )	/* Proms */
	ROM_LOAD( "82s131.7l", 0x000, 0x200, CRC(6a7d13c0) SHA1(2a835a4ac1acb7663d0b915d0339af9800284da6) )
	ROM_LOAD( "82s137.3t", 0x000, 0x400, CRC(59e44236) SHA1(f53d99694fa5acd7cc51dd78e09f0d2ef730e7a4) )
ROM_END


/*  ( YEAR   NAME     PARENT  MACHINE   INPUT     INIT  MONITOR  COMPANY                 FULLNAME ) */
GAME( 1986, argus,    0,      argus,    argus,    0,    ROT270,  "[NMK] (Jaleco license)", "Argus"          , GAME_IMPERFECT_GRAPHICS )
GAME( 1986, valtric,  0,      valtric,  valtric,  0,    ROT270,  "[NMK] (Jaleco license)", "Valtric"        , GAME_IMPERFECT_GRAPHICS )
GAME( 1987, butasan,  0,      butasan,  butasan,  0,    ROT0,    "[NMK] (Jaleco license)", "Butasan (Japan)", GAME_IMPERFECT_GRAPHICS )
GAME( 1988, bombsa,   0,      bombsa,   bombsa,   0,    ROT270,  "Jaleco",                 "Bombs Away"     , GAME_NOT_WORKING )
