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

Atari Night Driver Driver :)

Memory Map:
		0000-01FF	R/W 	SCRAM (Scratchpad RAM)
		0200-03FF	 W		PFW (Playfield Write)
		0400-05FF	 W		HVC (Horiz/Vert/Char for Roadway)
		0600-07FF	 R		IN0
		0800-09FF	 R		IN1
		0A00-0BFF	 W		OUT0
		0C00-0DFF	 W		OUT1
		0E00-0FFF	 -		OUT2 (Not used)
		8000-83FF	 R		PFR (Playfield Read)
		8400-87FF			Steering Reset
		8800-8FFF	 -		Spare (Not used)
		9000-97FF	 R		Program ROM1
		9800-9FFF	 R		Program ROM2
	   (F800-FFFF)	 R		Program ROM2 - only needed for the 6502 vectors

If you have any questions about how this driver works, don't hesitate to
ask.  - Mike Balfour (mab22@po.cwru.edu)
***************************************************************************/

#include "driver.h"
#include "vidhrdw/generic.h"

/* machine/nitedrvr.c */
extern unsigned char *nitedrvr_ram;
extern int nitedrvr_in0_r(int offset);
extern int nitedrvr_in1_r(int offset);
extern int nitedrvr_ram_r(int offset);
extern int nitedrvr_steering_reset_r(int offset);
extern void nitedrvr_steering_reset_w(int offset, int data);
extern void nitedrvr_out0_w(int offset, int data);
extern void nitedrvr_out1_w(int offset, int data);
extern void nitedrvr_ram_w(int offset, int data);


/* vidhrdw/nitedrvr.c */
extern unsigned char *nitedrvr_hvc;
extern void nitedrvr_hvc_w(int offset, int data);
extern void nitedrvr_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);


static struct MemoryReadAddress readmem[] =
{
	{ 0x0000, 0x00ff, nitedrvr_ram_r }, /* SCRAM */
	{ 0x0100, 0x01ff, nitedrvr_ram_r }, /* SCRAM */
	{ 0x0600, 0x07ff, nitedrvr_in0_r },
	{ 0x0800, 0x09ff, nitedrvr_in1_r },
	{ 0x8000, 0x807f, videoram_r }, /* PFR */
	{ 0x8080, 0x80ff, videoram_r }, /* PFR */
	{ 0x8100, 0x817f, videoram_r }, /* PFR */
	{ 0x8180, 0x81ff, videoram_r }, /* PFR */
	{ 0x8200, 0x827f, videoram_r }, /* PFR */
	{ 0x8280, 0x82ff, videoram_r }, /* PFR */
	{ 0x8300, 0x837f, videoram_r }, /* PFR */
	{ 0x8380, 0x83ff, videoram_r }, /* PFR */
	{ 0x8400, 0x87ff, nitedrvr_steering_reset_r },
	{ 0x9000, 0x9fff, MRA_ROM }, /* ROM1-ROM2 */
	{ 0xfff0, 0xffff, MRA_ROM }, /* ROM2 for 6502 vectors */
	{ -1 }	/* end of table */
};

static struct MemoryWriteAddress writemem[] =
{
	{ 0x0000, 0x00ff, nitedrvr_ram_w, &nitedrvr_ram }, /* SCRAM */
	{ 0x0100, 0x01ff, nitedrvr_ram_w }, /* SCRAM */
	{ 0x0200, 0x027f, videoram_w, &videoram, &videoram_size }, /* PFW */
	{ 0x0280, 0x02ff, videoram_w }, /* PFW */
	{ 0x0300, 0x037f, videoram_w }, /* PFW */
	{ 0x0380, 0x03ff, videoram_w }, /* PFW */
	{ 0x0400, 0x05ff, nitedrvr_hvc_w, &nitedrvr_hvc }, /* POSH, POSV, CHAR, Watchdog */
	{ 0x0a00, 0x0bff, nitedrvr_out0_w },
	{ 0x0c00, 0x0dff, nitedrvr_out1_w },
	{ 0x8400, 0x87ff, nitedrvr_steering_reset_w },
	{ 0x9000, 0x9fff, MWA_ROM }, /* ROM1-ROM2 */
	{ -1 }	/* end of table */
};

INPUT_PORTS_START( nitedrvr_input_ports )
	PORT_START		/* fake port, gets mapped to Night Driver ports */
		PORT_DIPNAME( 0x30, 0x10, "Cost" )
		PORT_DIPSETTING(	0x00, "2 plays/coin" )
		PORT_DIPSETTING(	0x10, "1 play/coin" )
		PORT_DIPSETTING(	0x20, "1 play/coin" ) /* not a typo */
		PORT_DIPSETTING(	0x30, "1 play/2 coins" )
		PORT_DIPNAME( 0xC0, 0x80, "Seconds" )
		PORT_DIPSETTING(	0x00, "50" )
		PORT_DIPSETTING(	0x40, "75" )
		PORT_DIPSETTING(	0x80, "100" )
		PORT_DIPSETTING(	0xC0, "125" )

	PORT_START		/* fake port, gets mapped to Night Driver ports */
		PORT_DIPNAME( 0x10, 0x00, "Track Set" )
		PORT_DIPSETTING(	0x00, "Normal" )
		PORT_DIPSETTING(	0x10, "Reverse" )
		PORT_DIPNAME( 0x20, 0x20, "Bonus Time Allowed" )
		PORT_DIPSETTING(	0x00, "None" )
		PORT_DIPSETTING(	0x20, "Score=350" )
		PORT_BIT (0x40, IP_ACTIVE_HIGH, IPT_VBLANK )
		PORT_BITX(0x80, IP_ACTIVE_LOW, IPT_SERVICE | IPF_TOGGLE, "Self Test", KEYCODE_F2, IP_JOY_NONE )

	PORT_START		/* fake port, gets mapped to Night Driver ports */
		PORT_BITX(0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN | IPF_PLAYER2, "1st gear", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
		PORT_BITX(0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT | IPF_PLAYER2, "2nd gear", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
		PORT_BITX(0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT | IPF_PLAYER2, "3rd gear", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
		PORT_BITX(0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP | IPF_PLAYER2, "4th gear", IP_KEY_DEFAULT, IP_JOY_DEFAULT )

	PORT_START		/* fake port, gets mapped to Night Driver ports */
		PORT_BIT (0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN )	/* Spare */
		PORT_DIPNAME( 0x20, 0x00, "Difficult Bonus" )
		PORT_DIPSETTING(	0x00, "Normal" )
		PORT_DIPSETTING(	0x20, "Difficult" )
		PORT_BIT (0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN )
		PORT_BIT (0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START		/* fake port, gets mapped to Night Driver ports */
		PORT_BIT (0x01, IP_ACTIVE_LOW, IPT_COIN1 )
		PORT_BIT (0x02, IP_ACTIVE_LOW, IPT_COIN2 )
		PORT_BIT (0x04, IP_ACTIVE_LOW, IPT_START1 )
		PORT_BITX(0x08, IP_ACTIVE_LOW, IPT_BUTTON1, "Gas", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
		PORT_BITX(0x10, IP_ACTIVE_HIGH, IPT_BUTTON2, "Novice Track", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
		PORT_BITX(0x20, IP_ACTIVE_HIGH, IPT_BUTTON3, "Expert Track", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
		PORT_BITX(0x40, IP_ACTIVE_HIGH, IPT_BUTTON4, "Pro Track", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
		PORT_BIT (0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )	/* Alternating signal? */

	PORT_START		/* fake port used for steering */
		PORT_ANALOG ( 0xff, 0x00, IPT_DIAL, 100, 10, 0, 0, 0 )

INPUT_PORTS_END


static struct GfxLayout charlayout =
{
	8,8,	/* 8*8 characters */
	64, 	/* 64 characters */
	1,		/* 1 bit per pixel */
	{ 0 },		  /* no separation in 1 bpp */
	{ 0, 1, 2, 3, 4, 5, 6, 7 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
	8*8 /* every char takes 8 consecutive bytes */
};

static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ 1, 0x0000, &charlayout, 0x00, 0x02 }, /* offset into colors, # of colors */
	{ -1 } /* end of array */
};

static unsigned char palette[] =
{
	0x00,0x00,0x00, /* BLACK */
	0xff,0xff,0xff, /* WHITE */
	0x55,0x55,0x55, /* DK GREY - for MAME text only */
	0x80,0x80,0x80, /* LT GREY - for MAME text only */
};

static unsigned short colortable[] =
{
	0x00, 0x01,
	0x01, 0x00,
};


static struct MachineDriver machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_M6502,
			1000000,	   /* 1 MHz ???? */
			0,
			readmem,writemem,0,0,
			interrupt,1
		}
	},
	57, DEFAULT_REAL_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,	/* single CPU, no need for interleaving */
	0,

	/* video hardware */
	32*8, 32*8, { 0*8, 32*8-1, 0*8, 32*8-1 },
	gfxdecodeinfo,
	sizeof(palette)/3,sizeof(colortable)/sizeof(unsigned short),
	0,

	VIDEO_TYPE_RASTER,
	0,
	generic_vh_start,
	generic_vh_stop,
	nitedrvr_vh_screenrefresh,

	/* sound hardware */
	0,0,0,0

};





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

  Game ROMs

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

ROM_START( nitedrvr_rom )
	ROM_REGION(0x10000) /* 64k for code */
	ROM_LOAD( "6569-01.d2",   0x9000, 0x0800, 0x7afa7542 )
	ROM_LOAD( "6570-01.f2",   0x9800, 0x0800, 0xbf5d77b1 )
	ROM_RELOAD( 			0xF800, 0x0800 )

	ROM_REGION_DISPOSE(0x200)	  /* 0.5k for graphics */
	ROM_LOAD( "6568-01.p2",   0x0000, 0x0200, 0xf80d8889 )
ROM_END

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

  Hi Score Routines

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

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

  Game driver(s)

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

struct GameDriver nitedrvr_driver =
{
	__FILE__,
	0,
	"nitedrvr",
	"Night Driver",
	"1976",
	"Atari",
	"Mike Balfour",
	0,
	&machine_driver,
	0,

	nitedrvr_rom,
	0, 0,
	0,
	0,	/* sound_prom */

	nitedrvr_input_ports,

	0, palette, colortable,
	ORIENTATION_DEFAULT,
	0,0
};
