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

                        -= 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

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

/* Variables defined in video: */

extern int skyfox_bg_pos, skyfox_bg_ctrl;


/* Functions defined in video: */

READ8_HANDLER( skyfox_vregs_r );
WRITE8_HANDLER( skyfox_vregs_w );

PALETTE_INIT( skyfox );

VIDEO_UPDATE( skyfox );


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


                                Main CPU


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


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

static ADDRESS_MAP_START( skyfox_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xbfff) AM_READ(MRA8_ROM				)	// ROM
	AM_RANGE(0xc000, 0xdfff) AM_READ(MRA8_RAM				)	// RAM
	AM_RANGE(0xe000, 0xe000) AM_READ(input_port_0_r		)	// Input Ports
	AM_RANGE(0xe001, 0xe001) AM_READ(input_port_1_r		)	//
	AM_RANGE(0xe002, 0xe002) AM_READ(input_port_2_r		)	//
	AM_RANGE(0xf001, 0xf001) AM_READ(input_port_3_r		)	//
//  AM_RANGE(0xff00, 0xff07) AM_READ(skyfox_vregs_r     )   // fake to read the vregs
ADDRESS_MAP_END

static ADDRESS_MAP_START( skyfox_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xbfff) AM_WRITE(MWA8_ROM								)	// ROM
	AM_RANGE(0xc000, 0xcfff) AM_WRITE(MWA8_RAM								)	// RAM
	AM_RANGE(0xd000, 0xd3ff) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) AM_SIZE(&spriteram_size	)	// Sprites
	AM_RANGE(0xd400, 0xdfff) AM_WRITE(MWA8_RAM								)	// RAM?
	AM_RANGE(0xe008, 0xe00f) AM_WRITE(skyfox_vregs_w						)	// Video Regs
ADDRESS_MAP_END






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


                                Sound CPU


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


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


static ADDRESS_MAP_START( skyfox_sound_readmem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM				)	// ROM
	AM_RANGE(0x8000, 0x87ff) AM_READ(MRA8_RAM				)	// RAM
	AM_RANGE(0xa001, 0xa001) AM_READ(YM2203_read_port_0_r 	)	// YM2203 #1
//  AM_RANGE(0xc001, 0xc001) AM_READ(YM2203_read_port_1_r   )   // YM2203 #2
	AM_RANGE(0xb000, 0xb000) AM_READ(soundlatch_r			)	// From Main CPU
ADDRESS_MAP_END

static ADDRESS_MAP_START( skyfox_sound_writemem, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM					)	// ROM
	AM_RANGE(0x8000, 0x87ff) AM_WRITE(MWA8_RAM					)	// RAM
//  AM_RANGE(0x9000, 0x9001) AM_WRITE(MWA8_NOP                  )   // ??
	AM_RANGE(0xa000, 0xa000) AM_WRITE(YM2203_control_port_0_w 	)	// YM2203 #1
	AM_RANGE(0xa001, 0xa001) AM_WRITE(YM2203_write_port_0_w 	)	//
//  AM_RANGE(0xb000, 0xb001) AM_WRITE(MWA8_NOP                  )   // ??
	AM_RANGE(0xc000, 0xc000) AM_WRITE(YM2203_control_port_1_w 	)	// YM2203 #2
	AM_RANGE(0xc001, 0xc001) AM_WRITE(YM2203_write_port_1_w 	)	//
ADDRESS_MAP_END




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


                                Input Ports


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

INPUT_PORTS_START( skyfox )

	PORT_START_TAG("IN0")	// Player 1
	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_TAG("IN1")	// DSW
	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_DIPSETTING(    0x00, "20K" )
	PORT_DIPSETTING(    0x08, "30K" )
	PORT_DIPSETTING(    0x10, "40K" )
	PORT_DIPSETTING(    0x18, "50K" )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hard ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Cocktail ) )


	PORT_START_TAG("IN2")	// Coins, DSW + Vblank
	PORT_BIT(  0x01, IP_ACTIVE_LOW, IPT_VBLANK  )
	PORT_BIT(  0x02, IP_ACTIVE_LOW, IPT_COIN1   )
	PORT_DIPNAME( 0x0c, 0x00, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x00, "1 Coin/1 Credit  2C/1C" )	// coin A & B
	PORT_DIPSETTING(    0x04, "1 Coin/2 Credits 3C/1C" )
	PORT_DIPSETTING(    0x08, "1 Coin/3 Credits 4C/1C" )
	PORT_DIPSETTING(    0x0c, "1 Coin/4 Credits 5C/1C" )
	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_TAG("IN3")	// DSW
	PORT_DIPNAME( 0x07, 0x02, DEF_STR( Lives ) )
	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_TAG("IN4")	// Fake input port, polled every VBLANK to generate an NMI upon coin insertion
	PORT_BIT(  0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(1)
	PORT_BIT(  0x02, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_IMPULSE(1)


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( REGION_GFX1, 0, layout_8x8x8,   0, 1 ) // [0] Sprites
GFXDECODE_END






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


                                Machine Drivers


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


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

/* Check for coin insertion once a frame (polling a fake input port).
   Generate an NMI in case. Scroll the background too. */

static INTERRUPT_GEN( skyfox_interrupt )
{
	/* Scroll the bg */
	skyfox_bg_pos += (skyfox_bg_ctrl >> 1) & 0x7;	// maybe..

	/* Check coin 1 & 2 */
	if ((readinputportbytag("IN4") & 3) != 3) cpunum_set_input_line(0, INPUT_LINE_NMI, PULSE_LINE);
}

static MACHINE_DRIVER_START( skyfox )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z80, 4000000)
	MDRV_CPU_PROGRAM_MAP(skyfox_readmem,skyfox_writemem)
	MDRV_CPU_VBLANK_INT(skyfox_interrupt,1)		/* NMI caused by coin insertion */

	MDRV_CPU_ADD(Z80, 1748000)
	/* audio CPU */
	MDRV_CPU_PROGRAM_MAP(skyfox_sound_readmem,skyfox_sound_writemem)

	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(DEFAULT_REAL_60HZ_VBLANK_DURATION)	// we're using IPT_VBLANK

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(512, 256)
	MDRV_SCREEN_VISIBLE_AREA(0+0x60, 320-1+0x60, 0+16, 256-1-16)	// from $30*2 to $CC*2+8
	MDRV_GFXDECODE(skyfox)
	MDRV_PALETTE_LENGTH(256+256)	/* 256 static colors (+256 for the background??) */

	MDRV_PALETTE_INIT(skyfox)
	MDRV_VIDEO_UPDATE(skyfox)

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

	MDRV_SOUND_ADD(YM2203, 1748000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)

	MDRV_SOUND_ADD(YM2203, 1748000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)
MACHINE_DRIVER_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
Sound processor - Z80  1.748MHz
                - YM2203C x2

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


ROM_START( skyfox )
	ROM_REGION( 0x10000, REGION_CPU1, 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, REGION_CPU2, 0 )		/* Sound Z80 Code */
	ROM_LOAD( "skyfox9.bin", 0x00000, 0x8000, CRC(0b283bf5) SHA1(5b14d0beea689ee7e9174017e5a127435df4fbe3) )

	ROM_REGION( 0x60000, REGION_GFX1, ROMREGION_DISPOSE )	/* 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, REGION_GFX2, 0 )	/* Background - do not dispose */
	ROM_LOAD( "skyfox10.bin", 0x0000, 0x8000, CRC(19f58f9c) SHA1(6887216243b47152129448cbb4c7d52309feed03) )

	ROM_REGION( 0x300, REGION_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( exerizrb )
	ROM_REGION( 0x10000, REGION_CPU1, 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, REGION_CPU2, 0 )		/* Sound Z80 Code */
	ROM_LOAD( "skyfox9.bin", 0x00000, 0x8000, CRC(0b283bf5) SHA1(5b14d0beea689ee7e9174017e5a127435df4fbe3) )	// 1-i

	ROM_REGION( 0x60000, REGION_GFX1, ROMREGION_DISPOSE )	/* 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, REGION_GFX2, 0 )	/* Background - do not dispose */
	ROM_LOAD( "skyfox10.bin", 0x0000, 0x8000, CRC(19f58f9c) SHA1(6887216243b47152129448cbb4c7d52309feed03) )	// 1-j

	ROM_REGION( 0x300, REGION_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 */
DRIVER_INIT( skyfox )
{
	UINT8 *RAM = memory_region(REGION_GFX1);
	UINT8 *end = RAM + memory_region_length(REGION_GFX1);
	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" , 0 )
GAME( 1987, exerizrb, skyfox, skyfox, skyfox, skyfox, ROT90, "Jaleco", "Exerizer (Japan) (bootleg)", 0 )
