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

    Arcadia System - (c) 1988 Arcadia Systems

    Driver by Ernesto Corvi and Mariusz Wojcieszek

    Games supported:

        SportTime Bowling
        Leader Board
        Ninja Mission
        Road Wars
        Sidewinder
        Space Ranger
        SportTime Table Hockey
        Spot
        Magic Johnson's Fast Break
        World Darts
        Xenon
        World Trophy Soccer

    Other Arcadia games (not dumped):

        Aaargh!
        Blasta Ball
        N.Y. Warriors
        Pool
        Rockford

    Hardware description (from targets.mame.net):

        In the late 80s, Arcadia collaborated with Mastertronic to create their own
        ten-interchangeable-game arcade platform called the Arcadia Multi Select system,
        using the same hardware as the beloved Commodore Amiga computer.

        (In fact, the Multi Select's main PCB is an A500 motherboard, to which the ROM
        cage is attached through the external expansion port).

        Reportedly the system was also (or was originally) supposed to have been released
        in two five-game Super Select versions--"Arcade Action" and "Sports Simulation"
        -- but no specimens of these have ever been seen.

    NOTES and TODO:
        - To get into service mode, hold down F2 before pressing a button after
        the 'INITIALIZATION OK' message. Pressing F2 during game brings service
        mode also.

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

#include "driver.h"
#include "sound/custom.h"
#include "includes/amiga.h"



/*************************************
 *
 *  Globals
 *
 *************************************/

static UINT8 coin_counter[2];



/*************************************
 *
 *  Dynamic installation of ROM board
 *
 *************************************/

WRITE16_HANDLER( arcadia_multibios_change_game )
{
	memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, 0x800000, 0x97ffff, 0, 0, (data == 0) ? MRA16_BANK2 : MRA16_NOP);
}



/*************************************
 *
 *  Special port handlers
 *
 *************************************/

static UINT32 arcadia_coin_counter_r(void *param)
{
	/* return coin counter values */
	return *(UINT8 *)param & 3;
}



/*************************************
 *
 *  CIA-A port A access:
 *
 *  PA7 = game port 1, pin 6 (fire)
 *  PA6 = game port 0, pin 6 (fire)
 *  PA5 = /RDY (disk ready)
 *  PA4 = /TK0 (disk track 00)
 *  PA3 = /WPRO (disk write protect)
 *  PA2 = /CHNG (disk change)
 *  PA1 = /LED (LED, 0=bright / audio filter control)
 *  PA0 = OVL (ROM/RAM overlay bit)
 *
 *************************************/

static UINT8 arcadia_cia_0_porta_r(void)
{
	return readinputportbytag("CIA0PORTA");
}

static void arcadia_cia_0_porta_w(UINT8 data)
{
	/* switch banks as appropriate */
	memory_set_bank(1, data & 1);

	/* swap the write handlers between ROM and bank 1 based on the bit */
	if ((data & 1) == 0)
		/* overlay disabled, map RAM on 0x000000 */
		memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x000000, 0x07ffff, 0, 0, MWA16_BANK1);

	else
		/* overlay enabled, map Amiga system ROM on 0x000000 */
		memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x000000, 0x07ffff, 0, 0, MWA16_ROM);

	/* bit 2 = Power Led on Amiga */
	set_led_status(0, (data & 2) ? 0 : 1);
}



/*************************************
 *
 *  CIA-A port B access:
 *
 *  PB7 = parallel data 7
 *  PB6 = parallel data 6
 *  PB5 = parallel data 5
 *  PB4 = parallel data 4
 *  PB3 = parallel data 3
 *  PB2 = parallel data 2
 *  PB1 = parallel data 1
 *  PB0 = parallel data 0
 *
 *************************************/

static UINT8 arcadia_cia_0_portb_r(void)
{
	return readinputportbytag("CIA0PORTB");
}

static void arcadia_cia_0_portb_w(UINT8 data)
{
	/* writing a 0 in the low bit clears one of the coins */
	if ((data & 1) == 0)
	{
		if (coin_counter[0] > 0)
			coin_counter[0]--;
		else if (coin_counter[1] > 0)
			coin_counter[1]--;
	}
}



/*************************************
 *
 *  Coin counters
 *
 *************************************/

static void coin_changed_callback(void *param, UINT32 oldval, UINT32 newval)
{
	UINT8 *counter = param;

	/* check for a 0 -> 1 transition */
	if (!oldval && newval && *counter < 3)
		*counter += 1;
}


static void arcadia_reset_coins(void)
{
	/* reset coin counters */
	coin_counter[0] = coin_counter[1] = 0;
}



/*************************************
 *
 *  Memory map
 *
 *************************************/

static ADDRESS_MAP_START( amiga_map, ADDRESS_SPACE_PROGRAM, 16 )
	ADDRESS_MAP_FLAGS( AMEF_UNMAP(1) )
	AM_RANGE(0x000000, 0x07ffff) AM_RAMBANK(1) AM_BASE(&amiga_chip_ram) AM_SIZE(&amiga_chip_ram_size)
	AM_RANGE(0xbfd000, 0xbfefff) AM_READWRITE(amiga_cia_r, amiga_cia_w)
	AM_RANGE(0xc00000, 0xdfffff) AM_READWRITE(amiga_custom_r, amiga_custom_w) AM_BASE(&amiga_custom_regs)
	AM_RANGE(0xe80000, 0xe8ffff) AM_READWRITE(amiga_autoconfig_r, amiga_autoconfig_w)
	AM_RANGE(0xf80000, 0xffffff) AM_ROM AM_REGION(REGION_USER1, 0)		/* Kickstart BIOS */

	AM_RANGE(0x800000, 0x97ffff) AM_ROMBANK(2) AM_REGION(REGION_USER3, 0)
	AM_RANGE(0x980000, 0x9fbfff) AM_ROM AM_REGION(REGION_USER2, 0)
	AM_RANGE(0x9fc000, 0x9ffffd) AM_RAM AM_BASE(&generic_nvram16) AM_SIZE(&generic_nvram_size)
	AM_RANGE(0x9ffffe, 0x9fffff) AM_WRITE(arcadia_multibios_change_game)
	AM_RANGE(0xf00000, 0xf7ffff) AM_ROM AM_REGION(REGION_USER2, 0)
ADDRESS_MAP_END



/*************************************
 *
 *  Input ports
 *
 *************************************/

INPUT_PORTS_START( arcadia )
	PORT_START_TAG("CIA0PORTA")
	PORT_BIT( 0x3f, IP_ACTIVE_LOW, IPT_SPECIAL )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL

	PORT_START_TAG("CIA0PORTB")
	PORT_DIPNAME( 0x01, 0x01, "DSW1 1" )
	PORT_DIPSETTING(    0x01, "Reset" )
	PORT_DIPSETTING(    0x00, "Set" )
	PORT_SERVICE_NO_TOGGLE( 0x02, IP_ACTIVE_LOW )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x30, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(arcadia_coin_counter_r, &coin_counter[0])
	PORT_BIT( 0xc0, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(arcadia_coin_counter_r, &coin_counter[1])

	PORT_START_TAG("JOY0DAT")
	PORT_BIT( 0x0303, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(amiga_joystick_convert, "P1JOY")
	PORT_BIT( 0xfcfc, IP_ACTIVE_HIGH, IPT_UNUSED )

	PORT_START_TAG("JOY1DAT")
	PORT_BIT( 0x0303, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(amiga_joystick_convert, "P2JOY")
	PORT_BIT( 0xfcfc, IP_ACTIVE_HIGH, IPT_UNUSED )

	PORT_START_TAG("POTGO")
	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_BUTTON2 )
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL
	PORT_BIT( 0xaaff, IP_ACTIVE_HIGH, IPT_UNUSED )

	PORT_START_TAG("P1JOY")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1)
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1)
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)

	PORT_START_TAG("P2JOY")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)

	PORT_START_TAG("COINS")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 )
INPUT_PORTS_END



/*************************************
 *
 *  Sound definitions
 *
 *************************************/

static struct CustomSound_interface amiga_custom_interface =
{
	amiga_sh_start
};



/*************************************
 *
 *  Machine driver
 *
 *************************************/

static MACHINE_DRIVER_START( arcadia )

	/* basic machine hardware */
	MDRV_CPU_ADD(M68000, 7159090)        /* 7.15909 Mhz (NTSC) */
	MDRV_CPU_PROGRAM_MAP(amiga_map,0)
	MDRV_CPU_VBLANK_INT(amiga_scanline_callback, 262)

	MDRV_SCREEN_REFRESH_RATE(59.997)
	MDRV_SCREEN_VBLANK_TIME(TIME_IN_USEC(0))

	MDRV_MACHINE_RESET(amiga)
	MDRV_NVRAM_HANDLER(generic_0fill)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_UPDATE_BEFORE_VBLANK)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(512*2, 262)
	MDRV_SCREEN_VISIBLE_AREA((129-8)*2, (449+8-1)*2, 44-8, 244+8-1)
	MDRV_PALETTE_LENGTH(4096)
	MDRV_PALETTE_INIT(amiga)

	MDRV_VIDEO_START(amiga)
	MDRV_VIDEO_UPDATE(generic_bitmapped)

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_STEREO("left", "right")

	MDRV_SOUND_ADD(CUSTOM, 3579545)
	MDRV_SOUND_CONFIG(amiga_custom_interface)
	MDRV_SOUND_ROUTE(0, "left", 0.50)
	MDRV_SOUND_ROUTE(1, "right", 0.50)
	MDRV_SOUND_ROUTE(2, "right", 0.50)
	MDRV_SOUND_ROUTE(3, "left", 0.50)
MACHINE_DRIVER_END



/*************************************
 *
 *  BIOS definition
 *
 *************************************/

#define ROM_LOAD16_BYTE_BIOS(bios,name,offset,length,hash)     ROMX_LOAD(name, offset, length, hash, ROM_SKIP(1) | ROM_BIOS(bios+1))

#define ARCADIA_BIOS \
	ROM_REGION16_BE(0x80000, REGION_USER1, 0 ) \
	ROM_LOAD16_WORD( "kick12.rom", 0x000000, 0x040000, CRC(a6ce1636) SHA1(11f9e62cf299f72184835b7b2a70a16333fc0d88) ) \
	ROM_COPY( REGION_USER1, 0x000000, 0x040000, 0x040000 ) \
	\
	ROM_REGION16_BE( 0x80000, REGION_USER2, 0 ) \
	ROM_SYSTEM_BIOS(0, "onep300", "OnePlay 3.00") \
	ROM_LOAD16_BYTE_BIOS( 0, "scpav3_0.1h", 0x000000, 0x10000, CRC(2d8e1a06) SHA1(be187f34624aeda110017c4a09242f7c00ef56a4) ) \
	ROM_LOAD16_BYTE_BIOS( 0, "scpav3_0.1l", 0x000001, 0x10000, CRC(e4f38fab) SHA1(01c2eb5965070893be6734eb1372576727716476) ) \
	ROM_SYSTEM_BIOS(1, "onep211", "OnePlay 2.11" ) \
	ROM_LOAD16_BYTE_BIOS( 1, "scpa211h", 0x000000, 0x10000, CRC(be9dbdc5) SHA1(1554da09f051ec53937d65d4e451de51bc0c69e5) ) \
	ROM_LOAD16_BYTE_BIOS( 1, "scpa211l", 0x000001, 0x10000, CRC(95b84504) SHA1(99999fc40909001b37aa1b543918118becc81800) ) \
	ROM_SYSTEM_BIOS(2, "tenp211", "TenPlay 2.11" ) \
	ROM_LOAD16_BYTE_BIOS( 2, "gcp-1-hi", 0x000000, 0x10000, CRC(67d44523) SHA1(f3e3699132cdf741518accb890c04d17374c4049) ) \
	ROM_LOAD16_BYTE_BIOS( 2, "gcp-1-lo", 0x000001, 0x10000, CRC(65d9b9cf) SHA1(5c60a0dd4a0a7d9b938ce6b0446a6ad2ecaf07ec) ) \
	ROM_LOAD16_BYTE_BIOS( 2, "gcp-2-hi", 0x020000, 0x10000, CRC(1d7594ae) SHA1(6173bbfecf18d7d9ee6bc2b6753ca9d42fabd781) ) \
	ROM_LOAD16_BYTE_BIOS( 2, "gcp-2-lo", 0x020001, 0x10000, CRC(e776198d) SHA1(694ca4cc99ed84a95d18201c94a3332f8599654f) ) \
	ROM_LOAD16_BYTE_BIOS( 2, "gcp-3-hi", 0x040000, 0x10000, CRC(3e7364be) SHA1(26e10d0ddc031a891138db36ce4f1732722e6847) ) \
	ROM_LOAD16_BYTE_BIOS( 2, "gcp-3-lo", 0x040001, 0x10000, CRC(87229e0d) SHA1(0b18544801e529f954b9e03226bd2e5475f36351) )



ROM_START( ar_bios )
	ARCADIA_BIOS

	ROM_REGION16_BE(0x180000, REGION_USER3, ROMREGION_ERASEFF)
ROM_END


/*************************************
 *
 *  Specific games
 *
 *************************************/

/* AIRH */
ROM_START( ar_airh )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "airh_1h.bin", 0x00000, 0x10000, CRC(290e8e9e) SHA1(9215e36f02adf4064934aab99accefcb17ea6d3f) )
	ROM_LOAD16_BYTE( "airh_1l.bin", 0x00001, 0x10000, CRC(155452b6) SHA1(aeaa67ea9cc543c9a43094545450159e4784fb5c) )
ROM_END


/* BOWL V 2.1 */
ROM_START( ar_bowl )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "bowl_1h.bin", 0x00000, 0x10000, CRC(c0c20422) SHA1(3576df08e7a4cdadaf9dea5da0770efe5f461b07) )
	ROM_LOAD16_BYTE( "bowl_1l.bin", 0x00001, 0x10000, CRC(1c7fe75c) SHA1(b1830b91b53ec24d4b072898acac02552e2eae97) )
	ROM_LOAD16_BYTE( "bowl_2h.bin", 0x20000, 0x10000, CRC(a1e497d8) SHA1(4b4885c6937b7cfb24921e84a80d6d4f56844a73) )
	ROM_LOAD16_BYTE( "bowl_2l.bin", 0x20001, 0x10000, CRC(ce23aa34) SHA1(4b17a8447286aeb775c4edb1968978e281422421) )
	ROM_LOAD16_BYTE( "bowl_3h.bin", 0x40000, 0x10000, CRC(0c55da71) SHA1(db8a1494fca3aa044da27ea1d3acf68be415be23) )
	ROM_LOAD16_BYTE( "bowl_3l.bin", 0x40001, 0x10000, CRC(5ce00809) SHA1(d7f336df28a033b38b5296537826d164aaf5e8c9) )
ROM_END


/* DART V 2.1 */
ROM_START( ar_dart )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "dart_1h.bin", 0x00000, 0x10000, CRC(4d6a33e2) SHA1(1a227b5b0b4aca40d46af62e44deebca60582363) )
	ROM_LOAD16_BYTE( "dart_1l.bin", 0x00001, 0x10000, CRC(3fa66973) SHA1(66b59870f8ed1bb5b46b2887d99a6a71ff0514ba) )
	ROM_LOAD16_BYTE( "dart_2h.bin", 0x20000, 0x10000, CRC(3a30426a) SHA1(bf9226d2bfd1fb2d70e55e30aa3dde953baf5792) )
	ROM_LOAD16_BYTE( "dart_2l.bin", 0x20001, 0x10000, CRC(479c0b73) SHA1(2ad958f4f2d902635d030cf3f466097da3cc421c) )
	ROM_LOAD16_BYTE( "dart_3h.bin", 0x40000, 0x10000, CRC(dd217562) SHA1(80e21112a87259785e5d172249dfe8058970fd4d) )
	ROM_LOAD16_BYTE( "dart_3l.bin", 0x40001, 0x10000, CRC(12cff829) SHA1(3826e5442bb125dff4f10ef8b0b65a2d5b8d9985) )
	ROM_LOAD16_BYTE( "dart_4h.bin", 0x60000, 0x10000, CRC(98b27f13) SHA1(eb4fe813be4f202badfb947291e75ec0df915c25) )
	ROM_LOAD16_BYTE( "dart_4l.bin", 0x60001, 0x10000, CRC(a059204c) SHA1(01fb21175957fa8e92f918ea560ceecc809ed0b7) )
	ROM_LOAD16_BYTE( "dart_5h.bin", 0x80000, 0x10000, CRC(38f4c236) SHA1(1a5501ed8e94cff584f40c3b984aff7aea9ec956) )
	ROM_LOAD16_BYTE( "dart_5l.bin", 0x80001, 0x10000, CRC(df4103cc) SHA1(c792cc52148afa7bde6458704d9de2550b6eb636) )
	ROM_LOAD16_BYTE( "dart_6h.bin", 0xa0000, 0x10000, CRC(e21cc8be) SHA1(04280eef26f4a97c2280bdec19b1bc586fceffb0) )
	ROM_LOAD16_BYTE( "dart_6l.bin", 0xa0001, 0x10000, CRC(21112d4e) SHA1(95e49aa2f23c6d005a0de3cf96a1c06adeacf2a9) )
ROM_END


/*
    Magic Johnson's Fast Break

    Piggyback 1.5mb rom board

             3h       7h       x
             2h       6h       x
             1h       5h       x
             scpa1h   4h       8h
             3l       7l       x
             2l       6l       x
     DS1220Y   1l       5l       x
     sec-scpa  scpa1l   4l       8l
*/
ROM_START( ar_fast )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "fastv28.1h", 0x000000, 0x10000, CRC(091e4533) SHA1(61a16deecd32b386d62aab95e8d4a61bddcd8af4) )
	ROM_LOAD16_BYTE( "fastv28.1l", 0x000001, 0x10000, CRC(8f7685c1) SHA1(b379c1a47618401cfbfcc7bd2d13ae51f5e73e46) )
	ROM_LOAD16_BYTE( "fastv28.2h", 0x020000, 0x10000, CRC(3a3dd931) SHA1(7be3316e2acf6b14b29ef2e36d8f76999d5d4e94) )
	ROM_LOAD16_BYTE( "fastv28.2l", 0x020001, 0x10000, CRC(4838d7e5) SHA1(d2ae5b8f25df51936937ddf62001347fccdf830a) )
	ROM_LOAD16_BYTE( "fastv28.3h", 0x040000, 0x10000, CRC(db94fa62) SHA1(4fe79a4226161b15ecdda9d85c1ad84cf31b6a30) )
	ROM_LOAD16_BYTE( "fastv28.3l", 0x040001, 0x10000, CRC(a400367d) SHA1(a4362beeb35fa0c9020883eab0a71194f3a90b9a) )
	ROM_LOAD16_BYTE( "fastv28.4h", 0x060000, 0x10000, CRC(c0a021dd) SHA1(c4c40c05050a2831b55683d85ee39b8870e0bf88) )
	ROM_LOAD16_BYTE( "fastv28.4l", 0x060001, 0x10000, CRC(870e60f1) SHA1(0f0566da96dfc898dbbc35dfaba489d1fc9ab435) )
	ROM_LOAD16_BYTE( "fastv28.5h", 0x080000, 0x10000, CRC(6daf4817) SHA1(ca0bf79e77a3e878da1f97ff9a64107e8c112aee) )
	ROM_LOAD16_BYTE( "fastv28.5l", 0x080001, 0x10000, CRC(f489da29) SHA1(5e70183acfd0d849ae9691b312ca98698b1a2252) )
	ROM_LOAD16_BYTE( "fastv28.6h", 0x0a0000, 0x10000, CRC(b23dbcfd) SHA1(67495235016e4bcbf6251e4073d6938a3c5b0eea) )
	ROM_LOAD16_BYTE( "fastv28.6l", 0x0a0001, 0x10000, CRC(4e23e807) SHA1(69c910d70fb85d037257b19a1be9e99c617bf1c4) )
	ROM_LOAD16_BYTE( "fastv28.7h", 0x0c0000, 0x10000, CRC(74d598eb) SHA1(9434169d316fc2802e7790e5b09be086fccab351) )
	ROM_LOAD16_BYTE( "fastv28.7l", 0x0c0001, 0x10000, CRC(b0649050) SHA1(a8efdfc82a63fc16ee2103b4c96b92d6f9e7afc6) )
	ROM_LOAD16_BYTE( "fastv28.8h", 0x0e0000, 0x10000, CRC(3650aaf0) SHA1(cc37aa94360159f45076eafaae8140a661bd52f6) )
	ROM_LOAD16_BYTE( "fastv28.8l", 0x0e0001, 0x10000, CRC(82603f68) SHA1(8affe73e97b966b8e63bff2c7914fb5ead7b60ff) )

	ROM_REGION( 0x0200, REGION_PLDS, ROMREGION_DISPOSE )
	ROM_LOAD( "pal16l8-sec-scpa.bin", 0x0000, 0x0104, NO_DUMP ) /* PAL is read protected */
ROM_END


/* LDRB */
ROM_START( ar_ldrb )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "lbg2401h", 0x00000, 0x10000, CRC(fe1287e9) SHA1(34088416d970614b31b25e982ef40fd950080b3e) )
	ROM_LOAD16_BYTE( "lbg2401l", 0x00001, 0x10000, CRC(7c7bb9ee) SHA1(5c76445732ab139db82fe21c16f49e2609bb03aa) )
	ROM_LOAD16_BYTE( "lbg2402h", 0x20000, 0x10000, CRC(64e5fbae) SHA1(0dde0d05b05f232aac9ad44398cedd8c7627f146) )
	ROM_LOAD16_BYTE( "lbg2402l", 0x20001, 0x10000, CRC(bb115e1c) SHA1(768cf51661f630b1c0a4b83b9f6124c78a517d0a) )
	ROM_LOAD16_BYTE( "lbg2403h", 0x40000, 0x10000, CRC(1d290e28) SHA1(0d589628fe59de9d7e2a57ddeabca991d1c79fdf) )
	ROM_LOAD16_BYTE( "lbg2403l", 0x40001, 0x10000, CRC(b1352a77) SHA1(ac7337a3778442d444002f730e2880f61f32cf2a) )
	ROM_LOAD16_BYTE( "lbg2404h", 0x60000, 0x10000, CRC(b621c688) SHA1(f2a50ebfc50725cdef77bb8a4864405dbb203784) )
	ROM_LOAD16_BYTE( "lbg2404l", 0x60001, 0x10000, CRC(13f9c4b0) SHA1(08a1fab271307191c5caa108c4ae284f92c270e4) )
	ROM_LOAD16_BYTE( "lbg2405h", 0x80000, 0x10000, CRC(71273172) SHA1(2b6204fdf03268e920b5948c999aa725fc66cac6) )
	ROM_LOAD16_BYTE( "lbg2405l", 0x80001, 0x10000, CRC(d9028183) SHA1(009b496da31f67b11de54e50254a9897ea68cd92) )
	ROM_LOAD16_BYTE( "lbg2406h", 0xa0000, 0x10000, CRC(a6ce61a4) SHA1(6cd64b7d589c91aeee06293f473fd1b3c56b19e0) )
	ROM_LOAD16_BYTE( "lbg2406l", 0xa0001, 0x10000, CRC(13c71422) SHA1(93e6dca2b28e1b5235b922f064be96eed0bedd8c) )
	ROM_LOAD16_BYTE( "lbg2407h", 0xc0000, 0x10000, CRC(61807fa9) SHA1(9d7097b921cf4026bb2828780e3fb87e0a3a24a0) )
	ROM_LOAD16_BYTE( "lbg2407l", 0xc0001, 0x10000, CRC(c62dae9f) SHA1(59b8e1c2469edd57024a4f3ca4222811442fa077) )
	ROM_LOAD16_BYTE( "lbg2408h", 0xe0000, 0x10000, CRC(b5911807) SHA1(b2995b308b2618f312005f130048e73c151311ae) )
	ROM_LOAD16_BYTE( "lbg2408l", 0xe0001, 0x10000, CRC(1f1ea828) SHA1(4af463bc6d58d64d4f082971c71654a6bb0c26bc) )
ROM_END


/* LDRB V 2.5 */
ROM_START( ar_ldrba )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "ldrb_1h.bin", 0x00000, 0x10000, CRC(0236511c) SHA1(22b2ee076ed57ba38413c16a52510383d8488e25) )
	ROM_LOAD16_BYTE( "ldrb_1l.bin", 0x00001, 0x10000, CRC(786d34b9) SHA1(5fd6ef94f65c6fd503d3682154b576d6509a3aa9) )
	ROM_LOAD16_BYTE( "ldrb_2h.bin", 0x20000, 0x10000, CRC(64e5fbae) SHA1(0dde0d05b05f232aac9ad44398cedd8c7627f146) )
	ROM_LOAD16_BYTE( "ldrb_2l.bin", 0x20001, 0x10000, CRC(bb115e1c) SHA1(768cf51661f630b1c0a4b83b9f6124c78a517d0a) )
	ROM_LOAD16_BYTE( "ldrb_3h.bin", 0x40000, 0x10000, CRC(1d290e28) SHA1(0d589628fe59de9d7e2a57ddeabca991d1c79fdf) )
	ROM_LOAD16_BYTE( "ldrb_3l.bin", 0x40001, 0x10000, CRC(b1352a77) SHA1(ac7337a3778442d444002f730e2880f61f32cf2a) )
	ROM_LOAD16_BYTE( "ldrb_4h.bin", 0x60000, 0x10000, CRC(b621c688) SHA1(f2a50ebfc50725cdef77bb8a4864405dbb203784) )
	ROM_LOAD16_BYTE( "ldrb_4l.bin", 0x60001, 0x10000, CRC(13f9c4b0) SHA1(08a1fab271307191c5caa108c4ae284f92c270e4) )
	ROM_LOAD16_BYTE( "ldrb_5h.bin", 0x80000, 0x10000, CRC(71273172) SHA1(2b6204fdf03268e920b5948c999aa725fc66cac6) )
	ROM_LOAD16_BYTE( "ldrb_5l.bin", 0x80001, 0x10000, CRC(d9028183) SHA1(009b496da31f67b11de54e50254a9897ea68cd92) )
	ROM_LOAD16_BYTE( "ldrb_6h.bin", 0xa0000, 0x10000, CRC(a6ce61a4) SHA1(6cd64b7d589c91aeee06293f473fd1b3c56b19e0) )
	ROM_LOAD16_BYTE( "ldrb_6l.bin", 0xa0001, 0x10000, CRC(13c71422) SHA1(93e6dca2b28e1b5235b922f064be96eed0bedd8c) )
	ROM_LOAD16_BYTE( "ldrb_7h.bin", 0xc0000, 0x10000, CRC(4ebb8d12) SHA1(c328a26139ba0792cab1020b32eb4b8e39d51a22) )
	ROM_LOAD16_BYTE( "ldrb_7l.bin", 0xc0001, 0x10000, CRC(1afa9a4f) SHA1(3e5ca56e03d693a72424b9ad0717494ea8eb561e) )
	ROM_LOAD16_BYTE( "ldrb_8h.bin", 0xe0000, 0x10000, CRC(fbdca9af) SHA1(9612eb777a00ba4153f40eaefd162ca5b5efdb54) )
	ROM_LOAD16_BYTE( "ldrb_8l.bin", 0xe0001, 0x10000, CRC(322f52eb) SHA1(3033eb753fb8b3bf56b152377bf567b06a0c8144) )
ROM_END


/* NINJ V 2.5 */
ROM_START( ar_ninj )
	ARCADIA_BIOS

	ROM_REGION16_BE(0x200000, REGION_USER3, 0)
	ROM_LOAD16_BYTE( "ninj_1h.bin", 0x00000, 0x10000, CRC(53b07b4d) SHA1(4852005adf60fe63f2da880dd32740d18fd31169) )
	ROM_LOAD16_BYTE( "ninj_1l.bin", 0x00001, 0x10000, CRC(3337a6c1) SHA1(be9719f0cd5872b51f4c6d32fcac2638c0dedaf4) )
	ROM_LOAD16_BYTE( "ninj_2h.bin", 0x20000, 0x10000, CRC(e28a5fa8) SHA1(150e26aea24706b72d2e6612280d5dddc527061b) )
	ROM_LOAD16_BYTE( "ninj_2l.bin", 0x20001, 0x10000, CRC(4f52c008) SHA1(c26bf9a7a21a5b78697a684bada90ff70160f868) )
	ROM_LOAD16_BYTE( "ninj_3h.bin", 0x40000, 0x10000, CRC(c6e4dd36) SHA1(a8dcea97e0eb1da462ad55fd543c637544bfd059) )
	ROM_LOAD16_BYTE( "ninj_3l.bin", 0x40001, 0x10000, CRC(1dca7ea5) SHA1(2950ea2e9267d27e0ebe785a08e2d6627ae5eb17) )
	ROM_LOAD16_BYTE( "ninj_4h.bin", 0x60000, 0x10000, CRC(dc1a21d4) SHA1(76463837e0da8fd61de334e00adb807c7ef92523) )
	ROM_LOAD16_BYTE( "ninj_4l.bin", 0x60001, 0x10000, CRC(64660b15) SHA1(9e9c5f61add1439613400fee0c2376dc4000e6c6) )
	ROM_LOAD16_BYTE( "ninj_5h.bin", 0x80000, 0x10000, CRC(49cda31b) SHA1(e9579b9d47f7e638f933b8ce659bc63c8bdeb0a4) )
	ROM_LOAD16_BYTE( "ninj_5l.bin", 0x80001, 0x10000, CRC(1c5ef815) SHA1(7e88c1545ee15efd928220989f8b29207a8fec7e) )
	ROM_LOAD16_BYTE( "ninj_6h.bin", 0xa0000, 0x10000, CRC(b647f31e) SHA1(18367b96418ab950ba97d656e1466234af3bca80) )
	ROM_LOAD16_BYTE( "ninj_6l.bin", 0xa0001, 0x10000, CRC(9e5407e3) SHA1(85a8383573f3cd120f323e867c7fa2b6badd5aad) )
ROM_END


/* RDWR V 2.3 */
ROM_START( ar_rdwr )
	ARCADIA_BIOS

	ROM_REGION16_BE(0x200000, REGION_USER3, 0)
	ROM_LOAD16_BYTE( "rdwr_1h.bin", 0x00000, 0x10000, CRC(f52cb704) SHA1(cce8c7484ae8c3a3d14b2e79a981780a277c9b1c) )
	ROM_LOAD16_BYTE( "rdwr_1l.bin", 0x00001, 0x10000, CRC(fde0de6d) SHA1(7f62ce854a040775548c5ba3b05e6a4dcb0d7cfb) )
	ROM_LOAD16_BYTE( "rdwr_2h.bin", 0x20000, 0x10000, CRC(8f3c1a2c) SHA1(e473e55457c04ebd597375e9936aeb0473507ed7) )
	ROM_LOAD16_BYTE( "rdwr_2l.bin", 0x20001, 0x10000, CRC(21865e15) SHA1(be4b0e77a17edeb77f6a9d4bec6d49d4a46242ea) )
	ROM_LOAD16_BYTE( "rdwr_3h.bin", 0x40000, 0x10000, CRC(0cb3bc66) SHA1(5e22abcd38fc74f472cc5090b7c2893aaabc37bd) )
	ROM_LOAD16_BYTE( "rdwr_3l.bin", 0x40001, 0x10000, CRC(d863a958) SHA1(d27b8ff2daa51319d5c44700c6dd74e4bc8d99a4) )
	ROM_LOAD16_BYTE( "rdwr_4h.bin", 0x60000, 0x10000, CRC(466fe771) SHA1(1cc65887e097302bd504b8c4da5f7d2b760d7f74) )
	ROM_LOAD16_BYTE( "rdwr_4l.bin", 0x60001, 0x10000, CRC(fff39238) SHA1(05b4a70e1f808254e1fb20a15c460655d14d4216) )
ROM_END


/* SDWR V 2.1 */
ROM_START( ar_sdwr )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "sdwr_1h.bin", 0x00000, 0x10000, CRC(aef3eea8) SHA1(4bf7619f52395fcbde3c8f7af3fd7da4af03c673) )
	ROM_LOAD16_BYTE( "sdwr_1l.bin", 0x00001, 0x10000, CRC(daed4add) SHA1(a9404a87f1958d7ab829fbb48855d2deb64c5aec) )
	ROM_LOAD16_BYTE( "sdwr_2h.bin", 0x20000, 0x10000, CRC(d67ba564) SHA1(2afba72a77806e3925c9ca1e13c16c442a6cfc3a) )
	ROM_LOAD16_BYTE( "sdwr_2l.bin", 0x20001, 0x10000, CRC(97f58a6d) SHA1(161bc8b3e14e5efca7b988f80cc16345280ca4bd) )
	ROM_LOAD16_BYTE( "sdwr_3h.bin", 0x40000, 0x10000, CRC(b31ad2b2) SHA1(66003bd331f61d1bd2e8f4d595b61503dad4e4b8) )
	ROM_LOAD16_BYTE( "sdwr_3l.bin", 0x40001, 0x10000, CRC(af929620) SHA1(5fde0f199016abf8fd9db821ee492feeba21b604) )
	ROM_LOAD16_BYTE( "sdwr_4h.bin", 0x60000, 0x10000, CRC(7502a271) SHA1(aa318619c0b98873b435b5bbf7feb2d5d51198f9) )
	ROM_LOAD16_BYTE( "sdwr_4l.bin", 0x60001, 0x10000, CRC(942d50b4) SHA1(eb0c9057ffd0d03dc2cde1158ce9f07de8ea6905) )
	ROM_LOAD16_BYTE( "sdwr_5h.bin", 0x80000, 0x10000, CRC(c25ac91d) SHA1(da4d46a2c987e2be2e31c081557b2de1744fa237) )
	ROM_LOAD16_BYTE( "sdwr_5l.bin", 0x80001, 0x10000, CRC(ecd1fbd3) SHA1(0b859d608859ccbff03db655219dfea4e609454d) )
	ROM_LOAD16_BYTE( "sdwr_6h.bin", 0xa0000, 0x10000, CRC(ea3c8ab3) SHA1(95cb5b9dd29c19862a2659867474cbf49192f830) )
	ROM_LOAD16_BYTE( "sdwr_6l.bin", 0xa0001, 0x10000, CRC(2544ccd7) SHA1(953aa00f2610ecd31db6e36964cbe7c2866050b9) )
ROM_END


/* SOCC */
ROM_START( ar_socc )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "socc30.1hi", 0x00000, 0x10000, CRC(b4df41cf) SHA1(681cecef390f82be420cd9f4d32afddace3da3c8) )
	ROM_LOAD16_BYTE( "socc30.1lo", 0x00001, 0x10000, CRC(28b5e119) SHA1(3fff3252b855e6ca1aceff89ec0c61688c954d88) )
	ROM_LOAD16_BYTE( "socc30.2hi", 0x20000, 0x10000, CRC(b3c14026) SHA1(be4e05cbf5b14a1dc77eff70bb44c8cdae57e59a) )
	ROM_LOAD16_BYTE( "socc30.2lo", 0x20001, 0x10000, CRC(f7f9a734) SHA1(064adbfb919c7422190b5e4146fbc335a2a97091) )
	ROM_LOAD16_BYTE( "socc30.3hi", 0x40000, 0x10000, CRC(2a2bd2a0) SHA1(9a9a0463ecf99941f88a163dcb111bf8c3508d78) )
	ROM_LOAD16_BYTE( "socc30.3lo", 0x40001, 0x10000, CRC(f335bb8b) SHA1(a15ee6b27d6e2aab25f3260edd0803fe1fa05f0e) )
	ROM_LOAD16_BYTE( "socc30.4hi", 0x60000, 0x10000, CRC(4f2f28dc) SHA1(cd419c80e7112163fd182d2cc58148d3674ccd8c) )
	ROM_LOAD16_BYTE( "socc30.4lo", 0x60001, 0x10000, CRC(b326d36c) SHA1(5ac2df36754c97065f74695a9c46e2a558e8e112) )
	ROM_LOAD16_BYTE( "socc30.5hi", 0x80000, 0x10000, CRC(4fcaec4a) SHA1(1286c57a81358a69573df6f6cedf44c564476320) )
	ROM_LOAD16_BYTE( "socc30.5lo", 0x80001, 0x10000, CRC(f131115e) SHA1(a9050878cbc1923bb88d46ecdad8f5bd69d389ea) )
	ROM_LOAD16_BYTE( "socc30.6hi", 0xa0000, 0x10000, CRC(9380644f) SHA1(01da02f9397c7b8fd44a78a533f09264eb4f3d0c) )
	ROM_LOAD16_BYTE( "socc30.6lo", 0xa0001, 0x10000, CRC(b93e13ea) SHA1(0fac9cb54099f0d0ad61eb6f5bd3686c27a045b9) )
ROM_END


/* SPOT */
ROM_START( ar_spot )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "spotv2.1h", 0x00000, 0x10000, CRC(a8440838) SHA1(8d64ddb603754c85aad47bd079d0a7d80d57b36c) )
	ROM_LOAD16_BYTE( "spotv2.1l", 0x00001, 0x10000, CRC(2abd2835) SHA1(b419da47c6390334ed8af56bc21430e5b43d6d58) )
	ROM_LOAD16_BYTE( "spotv2.2h", 0x20000, 0x10000, CRC(f4c95f77) SHA1(46c70755e3c6d06bec4b1bd164a586292a59249d) )
	ROM_LOAD16_BYTE( "spotv2.2l", 0x20001, 0x10000, CRC(58d7bf54) SHA1(0da63d32d738f8ed3675c6d14b2d12039af5ff21) )
	ROM_LOAD16_BYTE( "spotv2.3h", 0x40000, 0x10000, CRC(c9d2f3b7) SHA1(1b4693bcde14dc5eefe7456d4d613e6cb674c972) )
	ROM_LOAD16_BYTE( "spotv2.3l", 0x40001, 0x10000, CRC(adf94e81) SHA1(5ad56044008236edea0a44393daee06e572b1cc2) )
	ROM_LOAD16_BYTE( "spotv2.4h", 0x60000, 0x10000, CRC(cdea2feb) SHA1(4bb24b8cb5dd1e88d3f468979e2f350568414668) )
	ROM_LOAD16_BYTE( "spotv2.4l", 0x60001, 0x10000, CRC(214c353b) SHA1(819283248eac2a516f9fcdda060284ffe9c39bc8) )
	ROM_LOAD16_BYTE( "spotv2.5h", 0x80000, 0x10000, CRC(809d0f5c) SHA1(d1bae86090db8e5cc066afb76203704e7d217fde) )
	ROM_LOAD16_BYTE( "spotv2.5l", 0x80001, 0x10000, CRC(b86d8153) SHA1(42a564fa608e806d04052e67263afc4a5a417d40) )
	ROM_LOAD16_BYTE( "spotv2.6h", 0xa0000, 0x10000, CRC(8c221a34) SHA1(8f246bbcb79f5e508932d776fbfa648392f7f78d) )
	ROM_LOAD16_BYTE( "spotv2.6l", 0xa0001, 0x10000, CRC(821fa69a) SHA1(f037853be96158b8a6dd5f34e15ddfc16b6410c3) )
	ROM_LOAD16_BYTE( "spotv2.7h", 0xc0000, 0x10000, CRC(054355db) SHA1(6f4a46230b6dfd4727816737c31bce9483d3a3f7) )
	ROM_LOAD16_BYTE( "spotv2.7l", 0xc0001, 0x10000, CRC(30d396d8) SHA1(2a56727554a823f56b37b9e8d324e9f53524eb02) )
	ROM_LOAD16_BYTE( "spotv2.8h", 0xe0000, 0x10000, CRC(94dbb239) SHA1(0c475c8e102cc835d01e3de4604c1323219048f1) )
	ROM_LOAD16_BYTE( "spotv2.8l", 0xe0001, 0x10000, CRC(4d7f8f05) SHA1(04690717cec5912cd12ccb7135614842f5597898) )
ROM_END


/* SPRG */
ROM_START( ar_sprg )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "sprg_1h.bin", 0x00000, 0x10000, CRC(90b45dc5) SHA1(7cf1fc27e95bf207ed94cc5c20cf0c0ae7799d83) )
	ROM_LOAD16_BYTE( "sprg_1l.bin", 0x00001, 0x10000, CRC(e5ce68e9) SHA1(dfda2e0bffc499a497865bc214450653880eccf2) )
	ROM_LOAD16_BYTE( "sprg_2h.bin", 0x20000, 0x10000, CRC(02ef780f) SHA1(d21d6e8a379a2b38de7f3ec0540f67dd6425cbc9) )
	ROM_LOAD16_BYTE( "sprg_2l.bin", 0x20001, 0x10000, CRC(fa1f5b23) SHA1(4f808d8ee9cd672061995d0bfab65851bf1c01d3) )
	ROM_LOAD16_BYTE( "sprg_3h.bin", 0x40000, 0x10000, CRC(48130e6e) SHA1(479555c4a5c041c04135f01fbdd5c5f78f4422cf) )
	ROM_LOAD16_BYTE( "sprg_3l.bin", 0x40001, 0x10000, CRC(4b968cc6) SHA1(fbf3bcb5803dbe75e5a9bcde39c98c9c30bd1699) )
	ROM_LOAD16_BYTE( "sprg_4h.bin", 0x60000, 0x10000, CRC(23c8f667) SHA1(da75def3a34f6e7d48f2c6cefff608348c09cf70) )
	ROM_LOAD16_BYTE( "sprg_4l.bin", 0x60001, 0x10000, CRC(13ba011f) SHA1(75da2fbbfe2e957992b2a73609737d777fe9a151) )
ROM_END


/* XEON V 2.3 */
ROM_START( ar_xeon )
	ARCADIA_BIOS

	ROM_REGION16_BE( 0x180000, REGION_USER3, ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "xeon_1h.bin", 0x00000, 0x10000, CRC(ca422811) SHA1(fa6f82e1d91b48d58b61f916d5b04dc1a13774fb) )
	ROM_LOAD16_BYTE( "xeon_1l.bin", 0x00001, 0x10000, CRC(97edf967) SHA1(57fca524e01ba21f7420472f14aaf3fa63a326fa) )
	ROM_LOAD16_BYTE( "xeon_2h.bin", 0x20000, 0x10000, CRC(8078c10e) SHA1(599995374b23da7187556e2f4f285b60d818f885) )
	ROM_LOAD16_BYTE( "xeon_2l.bin", 0x20001, 0x10000, CRC(a8845d8f) SHA1(2d54dc25af68c46bbbdf8f9ed8014ae7d8564e09) )
	ROM_LOAD16_BYTE( "xeon_3h.bin", 0x40000, 0x10000, CRC(9d013152) SHA1(7a3bec56d564efbca9721d308b3eddc76763ec41) )
	ROM_LOAD16_BYTE( "xeon_3l.bin", 0x40001, 0x10000, CRC(331b1449) SHA1(0e282d04b2c7e68051e5ea1671737b11dfb71521) )
	ROM_LOAD16_BYTE( "xeon_4h.bin", 0x60000, 0x10000, CRC(fbf43d5c) SHA1(6d335b7b1d3b75887526cb8ea3518661b5554774) )
	ROM_LOAD16_BYTE( "xeon_4l.bin", 0x60001, 0x10000, CRC(47b60bf5) SHA1(10d8addc090ad3fa2663c40e22f736ac3522b177) )
ROM_END



/*************************************
 *
 *  Low byte ROM decoding
 *
 *************************************/

INLINE void generic_decode(int region, int bit7, int bit6, int bit5, int bit4, int bit3, int bit2, int bit1, int bit0)
{
	UINT16 *rom = (UINT16 *)memory_region(region);
	int i;

	/* only the low byte of ROMs are encrypted in these games */
	for (i = 0; i < 0x20000/2; i++)
		rom[i] = BITSWAP16(rom[i], 15,14,13,12,11,10,9,8, bit7,bit6,bit5,bit4,bit3,bit2,bit1,bit0);
}



/*************************************
 *
 *  Generic driver init
 *
 *************************************/

static void arcadia_init(void)
{
	static const amiga_machine_interface arcadia_intf =
	{
		ANGUS_CHIP_RAM_MASK,
		arcadia_cia_0_porta_r, arcadia_cia_0_portb_r,
		arcadia_cia_0_porta_w, arcadia_cia_0_portb_w,
		NULL, NULL,
		NULL, NULL,
		NULL, NULL, NULL,
		NULL, NULL, NULL,
		NULL,  arcadia_reset_coins
	};
	UINT16 *biosrom;

	/* configure our Amiga setup */
	amiga_machine_config(&arcadia_intf);

	/* set up memory */
	memory_configure_bank(1, 0, 1, amiga_chip_ram, 0);
	memory_configure_bank(1, 1, 1, memory_region(REGION_USER1), 0);

	/* OnePlay bios is encrypted, TenPlay is not */
	biosrom = (UINT16 *)memory_region(REGION_USER2);
	if (biosrom[0] != 0x4afc)
		generic_decode(REGION_USER2, 6, 1, 0, 2, 3, 4, 5, 7);

	/* request notifications when the coins change */
	input_port_set_changed_callback(port_tag_to_index("COINS"), 0x01, coin_changed_callback, &coin_counter[0]);
	input_port_set_changed_callback(port_tag_to_index("COINS"), 0x02, coin_changed_callback, &coin_counter[1]);
}



/*************************************
 *
 *  Per-game decryption
 *
 *************************************/

DRIVER_INIT( none )  {                                                       arcadia_init(); }
DRIVER_INIT( airh )  { generic_decode(REGION_USER3, 5, 0, 2, 4, 7, 6, 1, 3); arcadia_init(); }
DRIVER_INIT( bowl )  { generic_decode(REGION_USER3, 7, 6, 0, 1, 2, 3, 4, 5); arcadia_init(); }
DRIVER_INIT( dart )  { generic_decode(REGION_USER3, 4, 0, 7, 6, 3, 1, 2, 5); arcadia_init(); }
DRIVER_INIT( ldrba ) { generic_decode(REGION_USER3, 2, 3, 4, 1, 0, 7, 5, 6); arcadia_init(); }
DRIVER_INIT( ninj )  { generic_decode(REGION_USER3, 1, 6, 5, 7, 4, 2, 0, 3); arcadia_init(); }
DRIVER_INIT( rdwr )  { generic_decode(REGION_USER3, 3, 1, 6, 4, 0, 5, 2, 7); arcadia_init(); }
DRIVER_INIT( sdwr )  { generic_decode(REGION_USER3, 6, 3, 4, 5, 2, 1, 0, 7); arcadia_init(); }
DRIVER_INIT( socc )  { generic_decode(REGION_USER3, 0, 7, 1, 6, 5, 4, 3, 2); arcadia_init(); }
DRIVER_INIT( sprg )  { generic_decode(REGION_USER3, 4, 7, 3, 0, 6, 5, 2, 1); arcadia_init(); }
DRIVER_INIT( xeon )  { generic_decode(REGION_USER3, 3, 1, 2, 4, 0, 5, 6, 7); arcadia_init(); }



/*************************************
 *
 *  Game drivers
 *
 *************************************/

/* BIOS */
GAMEB( 1988, ar_bios,	0,		 ar_bios, arcadia, arcadia, none,  ROT0, "Arcadia Systems", "Arcadia System BIOS", NOT_A_DRIVER )

/* working */
GAMEB( 1988, ar_airh,	ar_bios, ar_bios, arcadia, arcadia, airh,  ROT0, "Arcadia Systems", "SportTime Table Hockey (Arcadia, V 2.1)", 0 )
GAMEB( 1988, ar_bowl,	ar_bios, ar_bios, arcadia, arcadia, bowl,  ROT0, "Arcadia Systems", "SportTime Bowling (Arcadia, V 2.1)", 0 )
GAMEB( 1987, ar_dart,	ar_bios, ar_bios, arcadia, arcadia, dart,  ROT0, "Arcadia Systems", "World Darts (Arcadia, V 2.1)", 0 )
GAMEB( 1988, ar_fast,	ar_bios, ar_bios, arcadia, arcadia, none,  ROT0, "Arcadia Systems", "Magic Johnson's Fast Break (Arcadia, V 2.8)", 0 )
GAMEB( 1988, ar_ldrb,	ar_bios, ar_bios, arcadia, arcadia, none,  ROT0, "Arcadia Systems", "Leader Board (Arcadia, V 2.4?)", 0 )
GAMEB( 1988, ar_ldrba,	ar_ldrb, ar_bios, arcadia, arcadia, ldrba, ROT0, "Arcadia Systems", "Leader Board (Arcadia, V 2.5)", 0 )
GAMEB( 1987, ar_ninj,	ar_bios, ar_bios, arcadia, arcadia, ninj,  ROT0, "Arcadia Systems", "Ninja Mission (Arcadia, V 2.5)", 0 )
GAMEB( 1988, ar_rdwr,	ar_bios, ar_bios, arcadia, arcadia, rdwr,  ROT0, "Arcadia Systems", "RoadWars (Arcadia, V 2.3)", 0  )
GAMEB( 1988, ar_sdwr,	ar_bios, ar_bios, arcadia, arcadia, sdwr,  ROT0, "Arcadia Systems", "Sidewinder (Arcadia, V 2.1)", 0 )
GAMEB( 1989, ar_socc,	ar_bios, ar_bios, arcadia, arcadia, socc,  ROT0, "Arcadia Systems", "World Trophy Soccer (Arcadia, V 3.0)", 0 )
GAMEB( 1990, ar_spot,	ar_bios, ar_bios, arcadia, arcadia, none,  ROT0, "Arcadia Systems", "Spot (Arcadia)", 0 )
GAMEB( 1987, ar_sprg,	ar_bios, ar_bios, arcadia, arcadia, sprg,  ROT0, "Arcadia Systems", "Space Ranger (Arcadia, V 2.0)", 0 )
GAMEB( 1988, ar_xeon,	ar_bios, ar_bios, arcadia, arcadia, xeon,  ROT0, "Arcadia Systems", "Xenon (Arcadia, V 2.3)", 0 )
