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

                        -= Sky Fox / Exerizer =-

                driver by   Luca Elia (l.elia@tin.it)


CPU  :  Z80A x 2
Sound:  YM2203C x 2
Other:  2 HM6116LP-3 (one on each board)
        1 KM6264L-15 (on bottom board)

To Do:  The background rendering is entirely guesswork

2008-07
Verified Dip locations and recommended settings with manual

***************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "sound/2203intf.h"
#include "includes/skyfox.h"


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


                                Main CPU


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


/***************************************************************************
                                Sky Fox
***************************************************************************/

static ADDRESS_MAP_START( skyfox_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xbfff) AM_ROM							// ROM
	AM_RANGE(0xc000, 0xcfff) AM_RAM							// RAM
	AM_RANGE(0xd000, 0xd3ff) AM_RAM AM_BASE_SIZE_MEMBER(skyfox_state, m_spriteram, m_spriteram_size)	// Sprites
	AM_RANGE(0xd400, 0xdfff) AM_RAM							// RAM?
	AM_RANGE(0xe000, 0xe000) AM_READ_PORT("INPUTS")			// Input Ports
	AM_RANGE(0xe001, 0xe001) AM_READ_PORT("DSW0")			//
	AM_RANGE(0xe002, 0xe002) AM_READ_PORT("DSW1")			//
	AM_RANGE(0xe008, 0xe00f) AM_WRITE(skyfox_vregs_w)		// Video Regs
	AM_RANGE(0xf001, 0xf001) AM_READ_PORT("DSW2")			//
//  AM_RANGE(0xff00, 0xff07) AM_READ(skyfox_vregs_r)        // fake to read the vregs
ADDRESS_MAP_END


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


                                Sound CPU


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


/***************************************************************************
                                Sky Fox
***************************************************************************/


static ADDRESS_MAP_START( skyfox_sound_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM								// ROM
	AM_RANGE(0x8000, 0x87ff) AM_RAM								// RAM
//  AM_RANGE(0x9000, 0x9001) AM_WRITENOP                        // ??
	AM_RANGE(0xa000, 0xa001) AM_DEVREADWRITE("ym1", ym2203_r,ym2203_w)	// YM2203 #1
//  AM_RANGE(0xb000, 0xb001) AM_WRITENOP                        // ??
	AM_RANGE(0xc000, 0xc001) AM_DEVREADWRITE("ym2", ym2203_r,ym2203_w)	// YM2203 #2
	AM_RANGE(0xb000, 0xb000) AM_READ(soundlatch_r)				// From Main CPU
ADDRESS_MAP_END


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


                                Input Ports


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

static INPUT_CHANGED( coin_inserted )
{
	skyfox_state *state = field.machine().driver_data<skyfox_state>();
	device_set_input_line(state->m_maincpu, INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE);
}

static INPUT_PORTS_START( skyfox )
	PORT_START("INPUTS")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 )

	PORT_START("DSW0")
	PORT_DIPNAME( 0x01, 0x01, "Unknown 1-0" )		// rest unused?
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, "Unknown 1-1" )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, "Unknown 1-2" )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x18, 0x08, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SW1:4,5")
	PORT_DIPSETTING(    0x00, "20K" )
	PORT_DIPSETTING(    0x08, "30K" )
	PORT_DIPSETTING(    0x10, "40K" )
	PORT_DIPSETTING(    0x18, "50K" )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:6")
	PORT_DIPSETTING(    0x20, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hard ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Flip_Screen ) ) PORT_DIPLOCATION("SW1:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:8")
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Cocktail ) )

	PORT_START("DSW1")	// Coins, DSW + Vblank
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_VBLANK  )
	PORT_DIPNAME( 0x0e, 0x00, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW2:1,2,3")
	PORT_DIPSETTING(    0x0e, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	/* According to manual, there is also "SW2:4" which has to be always OFF */
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("DSW2")	// DSW
	PORT_DIPNAME( 0x07, 0x02, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW1:1,2,3")
	PORT_DIPSETTING(    0x00, "1" )
	PORT_DIPSETTING(    0x01, "2" )
	PORT_DIPSETTING(    0x02, "3" )
	PORT_DIPSETTING(    0x03, "4" )
	PORT_DIPSETTING(    0x04, "5" )
//  PORT_DIPSETTING(    0x05, "5" )
//  PORT_DIPSETTING(    0x06, "5" )
	PORT_DIPSETTING(	0x07, "Infinite (Cheat)")
	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_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("COINS")	// Fake input port, coins are directly connected on NMI line
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_CHANGED(coin_inserted, 0)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_CHANGED(coin_inserted, 0)
INPUT_PORTS_END




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


                                Graphics Layouts


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

/* 8x8x8 tiles (note that the tiles in the ROMs are 32x32x8, but
   we cut them in 8x8x8 ones in the init function, in order to
   support 8x8, 16x16 and 32x32 sprites. */

static const gfx_layout layout_8x8x8 =
{
	8,8,
	RGN_FRAC(1,1),
	8,
	{0,1,2,3,4,5,6,7},
	{0*8,1*8,2*8,3*8,4*8,5*8,6*8,7*8},
	{0*64,1*64,2*64,3*64,4*64,5*64,6*64,7*64},
	8*8*8
};

/***************************************************************************
                                Sky Fox
***************************************************************************/

static GFXDECODE_START( skyfox )
	GFXDECODE_ENTRY( "gfx1", 0, layout_8x8x8,   0, 1 ) // [0] Sprites
GFXDECODE_END


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


                                Machine Drivers


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


/***************************************************************************
                                Sky Fox
***************************************************************************/

/* Scroll the background on every vblank (guess). */

static INTERRUPT_GEN( skyfox_interrupt )
{
	skyfox_state *state = device->machine().driver_data<skyfox_state>();

	/* Scroll the bg */
	state->m_bg_pos += (state->m_bg_ctrl >> 1) & 0x7;	// maybe..
}

static MACHINE_START( skyfox )
{
	skyfox_state *state = machine.driver_data<skyfox_state>();

	state->m_maincpu = machine.device("maincpu");

	state->save_item(NAME(state->m_bg_pos));
	state->save_item(NAME(state->m_bg_ctrl));
}

static MACHINE_RESET( skyfox )
{
	skyfox_state *state = machine.driver_data<skyfox_state>();

	state->m_bg_pos = 0;
	state->m_bg_ctrl = 0;
}

static MACHINE_CONFIG_START( skyfox, skyfox_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, XTAL_8MHz/2) /* Verified at 4MHz */
	MCFG_CPU_PROGRAM_MAP(skyfox_map)
	MCFG_CPU_VBLANK_INT("screen", skyfox_interrupt)		/* NMI caused by coin insertion */

	MCFG_CPU_ADD("audiocpu", Z80, XTAL_14_31818MHz/8) /* Verified at 1.789772MHz */
	MCFG_CPU_PROGRAM_MAP(skyfox_sound_map)

	MCFG_MACHINE_START(skyfox)
	MCFG_MACHINE_RESET(skyfox)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(62.65)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)	// we're using IPT_VBLANK
	MCFG_SCREEN_SIZE(512, 256)
	MCFG_SCREEN_VISIBLE_AREA(0+0x60, 320-1+0x60, 0+16, 256-1-16)	// from $30*2 to $CC*2+8
	MCFG_SCREEN_UPDATE_STATIC(skyfox)

	MCFG_GFXDECODE(skyfox)
	MCFG_PALETTE_LENGTH(256+256)	/* 256 static colors (+256 for the background??) */

	MCFG_PALETTE_INIT(skyfox)

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

	MCFG_SOUND_ADD("ym1", YM2203, XTAL_14_31818MHz/8) /* Verified at 1.789772MHz */
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)

	MCFG_SOUND_ADD("ym2", YM2203, XTAL_14_31818MHz/8) /* Verified at 1.789772MHz */
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)
MACHINE_CONFIG_END






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


                                ROMs Loading


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



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

                                    Sky Fox


c042    :   Lives
c044-5  :   Score (BCD)
c048-9  :   Power (BCD)

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

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

                                Exerizer [Bootleg]

malcor

Location     Type     File ID    Checksum
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TB 5E       27C256      1-J        F302      [  background  ]
TB 5N       27C256      1-I        F5E3      [    sound     ]
LB          27C256      1-A        A53E      [  program 1   ]
LB          27C256      1-B        382C      [  program 2   ]
LB          27C512      1-C        CDAC      [     GFX      ]
LB          27C512      1-D        9C7A      [     GFX      ]
LB          27C512      1-E        D808      [     GFX      ]
LB          27C512      1-F        F87E      [     GFX      ]
LB          27C512      1-G        9709      [     GFX      ]
LB          27C512      1-H        DFDA      [     GFX      ]
TB          82S129      1.BPR      0972      [ video blue   ]
TB          82S129      2.BPR      0972      [ video red    ]
TB          82S129      3.BPR      0972      [ video green  ]

Lower board ROM locations:

---=======------=======----
|    CN2          CN1     |
|                     1-A |
|                         |
|                     1-B |
|                         |
|                         |
|              1 1 1 1 1 1|
|              H G F E D C|
---------------------------

Notes  -  This archive is of a bootleg copy,
       -  Japanese program revision
       -  Although the colour PROMs have the same checksums,
          they are not the same.

Main processor  - Z80 @ 4MHz (8MHz OSC / 2)
Sound processor - Z80 @ 1.789772MHz (14.31818MHz OSC / 8)
                - YM2203C x2 @ 1.789772MHzMHz (14.31818MHz OSC / 8)

Vsync: 62.65hz

  CPU board: Jaleco made in japan ER-8736
Video Board: Jaleco made in japan ER-8737

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


ROM_START( skyfox )
	ROM_REGION( 0x10000, "maincpu", 0 )		/* Main Z80 Code */
	ROM_LOAD( "skyfox1.bin", 0x00000, 0x8000, CRC(b4d4bb6f) SHA1(ed1cf6d91ca7170cb7d1c80b586c11164430fd49) )
	ROM_LOAD( "skyfox2.bin", 0x08000, 0x8000, CRC(e15e0263) SHA1(005934327834aed46b17161aef82117ee508e9c4) )	// identical halves

	ROM_REGION( 0x10000, "audiocpu", 0 )		/* Sound Z80 Code */
	ROM_LOAD( "skyfox9.bin", 0x00000, 0x8000, CRC(0b283bf5) SHA1(5b14d0beea689ee7e9174017e5a127435df4fbe3) )

	ROM_REGION( 0x60000, "gfx1", 0 )	/* Sprites */
	ROM_LOAD( "skyfox3.bin", 0x00000, 0x10000, CRC(3a17a929) SHA1(973fb36af416161e04a83d7869819d9b13df18cd) )
	ROM_LOAD( "skyfox4.bin", 0x10000, 0x10000, CRC(358053bb) SHA1(589e3270eda0d44e73fbc7ac06e782f332920b39) )
	ROM_LOAD( "skyfox5.bin", 0x20000, 0x10000, CRC(c1215a6e) SHA1(5ca30be8a68ac6a00907cc9e47ede0acec980f46) )
	ROM_LOAD( "skyfox6.bin", 0x30000, 0x10000, CRC(cc37e15d) SHA1(80806df6185f7b8c2d3ab98420ca514df3e63c8d) )
	ROM_LOAD( "skyfox7.bin", 0x40000, 0x10000, CRC(fa2ab5b4) SHA1(c0878b25dae28f7d49e14376ff885d1d4e3d5dfe) )
	ROM_LOAD( "skyfox8.bin", 0x50000, 0x10000, CRC(0e3edc49) SHA1(3d1c59ecaabe1c9517203b7e814db41d5cff0cd4) )

	ROM_REGION( 0x08000, "gfx2", 0 )	/* Background - do not dispose */
	ROM_LOAD( "skyfox10.bin", 0x0000, 0x8000, CRC(19f58f9c) SHA1(6887216243b47152129448cbb4c7d52309feed03) )

	ROM_REGION( 0x300, "proms", 0 )	/* Color Proms */
	ROM_LOAD( "sfoxrprm.bin", 0x000, 0x100, CRC(79913c7f) SHA1(e64e6a3eb55f37984cb2597c8ffba6bc3bad49c7) )	// R
	ROM_LOAD( "sfoxgprm.bin", 0x100, 0x100, CRC(fb73d434) SHA1(4a9bd61fbdce9441753c5921f95ead5c4655957e) )	// G
	ROM_LOAD( "sfoxbprm.bin", 0x200, 0x100, CRC(60d2ab41) SHA1(e58a54f2aaee5c07136d5437e513d61fb18fbd9f) )	// B
ROM_END

ROM_START( exerizer )
	ROM_REGION( 0x10000, "maincpu", 0 )		/* Main Z80 Code */
	ROM_LOAD( "1.2v",        0x00000, 0x8000, CRC(5df72a5d) SHA1(ca35ac06f3702fd650a584da2f442fbc61c00fce) )
	ROM_LOAD( "2.3v",        0x08000, 0x8000, CRC(e15e0263) SHA1(005934327834aed46b17161aef82117ee508e9c4) )	// 1-b

	ROM_REGION( 0x10000, "audiocpu", 0 )		/* Sound Z80 Code */
	ROM_LOAD( "9.5n",        0x00000, 0x8000, CRC(0b283bf5) SHA1(5b14d0beea689ee7e9174017e5a127435df4fbe3) )	// 1-i

	ROM_REGION( 0x60000, "gfx1", 0 )	/* Sprites */
	ROM_LOAD( "3-1.7w",      0x00000, 0x10000, CRC(3a17a929) SHA1(973fb36af416161e04a83d7869819d9b13df18cd) )
	ROM_LOAD( "4.7u",        0x10000, 0x10000, CRC(358053bb) SHA1(589e3270eda0d44e73fbc7ac06e782f332920b39) )	// 1-d
	ROM_LOAD( "5-1.7t",      0x20000, 0x10000, CRC(c1215a6e) SHA1(5ca30be8a68ac6a00907cc9e47ede0acec980f46) )
	ROM_LOAD( "6.7s",        0x30000, 0x10000, CRC(cc37e15d) SHA1(80806df6185f7b8c2d3ab98420ca514df3e63c8d) )	// 1-f
	ROM_LOAD( "7.7p",        0x40000, 0x10000, CRC(c9bbfe5c) SHA1(ce3f7d32baa8bb0bfc110877b5b5f4648ee959ac) )
	ROM_LOAD( "8.7n",        0x50000, 0x10000, CRC(0e3edc49) SHA1(3d1c59ecaabe1c9517203b7e814db41d5cff0cd4) )	// 1-h

	ROM_REGION( 0x08000, "gfx2", 0 )	/* Background - do not dispose */
	ROM_LOAD( "10.5e",       0x0000, 0x8000, CRC(19f58f9c) SHA1(6887216243b47152129448cbb4c7d52309feed03) )	// 1-j

	ROM_REGION( 0x300, "proms", 0 )	/* Color Proms */
	ROM_LOAD( "r.1c",        0x000, 0x100, CRC(79913c7f) SHA1(e64e6a3eb55f37984cb2597c8ffba6bc3bad49c7) )	// 2-bpr
	ROM_LOAD( "g.1b",        0x100, 0x100, CRC(fb73d434) SHA1(4a9bd61fbdce9441753c5921f95ead5c4655957e) )	// 3-bpr
	ROM_LOAD( "b.1d",        0x200, 0x100, CRC(60d2ab41) SHA1(e58a54f2aaee5c07136d5437e513d61fb18fbd9f) )	// 1-bpr
ROM_END

ROM_START( exerizerb )
	ROM_REGION( 0x10000, "maincpu", 0 )		/* Main Z80 Code */
	ROM_LOAD( "1-a",         0x00000, 0x8000, CRC(5df72a5d) SHA1(ca35ac06f3702fd650a584da2f442fbc61c00fce) )
	ROM_LOAD( "skyfox2.bin", 0x08000, 0x8000, CRC(e15e0263) SHA1(005934327834aed46b17161aef82117ee508e9c4) )	// 1-b

	ROM_REGION( 0x10000, "audiocpu", 0 )		/* Sound Z80 Code */
	ROM_LOAD( "skyfox9.bin", 0x00000, 0x8000, CRC(0b283bf5) SHA1(5b14d0beea689ee7e9174017e5a127435df4fbe3) )	// 1-i

	ROM_REGION( 0x60000, "gfx1", 0 )	/* Sprites */
	ROM_LOAD( "1-c",         0x00000, 0x10000, CRC(450e9381) SHA1(f99b2ca73f1e4ba91b8066bb6d28d33b66a3ee81) )
	ROM_LOAD( "skyfox4.bin", 0x10000, 0x10000, CRC(358053bb) SHA1(589e3270eda0d44e73fbc7ac06e782f332920b39) )	// 1-d
	ROM_LOAD( "1-e",         0x20000, 0x10000, CRC(50a38c60) SHA1(a4b8d530914d6c85b15940a7821b4365068de668) )
	ROM_LOAD( "skyfox6.bin", 0x30000, 0x10000, CRC(cc37e15d) SHA1(80806df6185f7b8c2d3ab98420ca514df3e63c8d) )	// 1-f
	ROM_LOAD( "1-g",         0x40000, 0x10000, CRC(c9bbfe5c) SHA1(ce3f7d32baa8bb0bfc110877b5b5f4648ee959ac) )
	ROM_LOAD( "skyfox8.bin", 0x50000, 0x10000, CRC(0e3edc49) SHA1(3d1c59ecaabe1c9517203b7e814db41d5cff0cd4) )	// 1-h

	ROM_REGION( 0x08000, "gfx2", 0 )	/* Background - do not dispose */
	ROM_LOAD( "skyfox10.bin", 0x0000, 0x8000, CRC(19f58f9c) SHA1(6887216243b47152129448cbb4c7d52309feed03) )	// 1-j

	ROM_REGION( 0x300, "proms", 0 )	/* Color Proms */
	ROM_LOAD( "sfoxrprm.bin", 0x000, 0x100, CRC(79913c7f) SHA1(e64e6a3eb55f37984cb2597c8ffba6bc3bad49c7) )	// 2-bpr
	ROM_LOAD( "sfoxgprm.bin", 0x100, 0x100, CRC(fb73d434) SHA1(4a9bd61fbdce9441753c5921f95ead5c4655957e) )	// 3-bpr
	ROM_LOAD( "sfoxbprm.bin", 0x200, 0x100, CRC(60d2ab41) SHA1(e58a54f2aaee5c07136d5437e513d61fb18fbd9f) )	// 1-bpr
ROM_END




/* Untangle the graphics: cut each 32x32x8 tile in 16 8x8x8 tiles */
static DRIVER_INIT( skyfox )
{
	UINT8 *RAM = machine.region("gfx1")->base();
	UINT8 *end = RAM + machine.region("gfx1")->bytes();
	UINT8 buf[32 * 32];

	while (RAM < end)
	{
		int i;
		for (i = 0; i < (32 * 32); i++)
			buf[i] = RAM[(i % 8) + ((i / 8) % 8) * 32 + ((i / 64) % 4) * 8 + (i / 256) * 256];

		memcpy(RAM, buf, 32 * 32);
		RAM += 32 * 32;
	}
}



GAME( 1987, skyfox,    0,      skyfox, skyfox, skyfox, ROT90, "Jaleco (Nichibutsu USA license)", "Sky Fox" , GAME_SUPPORTS_SAVE )
GAME( 1987, exerizer,  skyfox, skyfox, skyfox, skyfox, ROT90, "Jaleco", "Exerizer (Japan)", GAME_SUPPORTS_SAVE )
GAME( 1987, exerizerb, skyfox, skyfox, skyfox, skyfox, ROT90, "bootleg", "Exerizer (Japan) (bootleg)", GAME_SUPPORTS_SAVE )
