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

Xybots Memory Map
-----------------------------------

XYBOTS 68000 MEMORY MAP

Function                           Address        R/W  DATA
-------------------------------------------------------------
Program ROM                        000000-007FFF  R    D0-D15
Program ROM/SLAPSTIC               008000-00FFFF  R    D0-D15
Program ROM                        010000-02FFFF  R    D0-D15

NOTE: All addresses can be accessed in byte or word mode.


XYBOTS 6502 MEMORY MAP


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



#include "driver.h"
#include "machine/atarigen.h"
#include "sndhrdw/atarijsa.h"
#include "vidhrdw/generic.h"


void xybots_playfieldram_w(int offset, int data);

int xybots_vh_start(void);
void xybots_vh_stop(void);
void xybots_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);

void xybots_scanline_update(int scanline);



/*************************************
 *
 *		Initialization
 *
 *************************************/

static void update_interrupts(void)
{
	int newstate = 0;

	if (atarigen_video_int_state)
		newstate = 1;
	if (atarigen_sound_int_state)
		newstate = 2;

	if (newstate)
		cpu_set_irq_line(0, newstate, ASSERT_LINE);
	else
		cpu_set_irq_line(0, 7, CLEAR_LINE);
}


static void init_machine(void)
{
	atarigen_eeprom_reset();
	atarigen_slapstic_reset();
	atarigen_interrupt_reset(update_interrupts);
	atarigen_scanline_timer_reset(xybots_scanline_update, 8);
	atarijsa_reset();
}



/*************************************
 *
 *		I/O handlers
 *
 *************************************/

static int special_port1_r(int offset)
{
	static int h256 = 0x0400;

	int result = input_port_1_r(offset);

	if (atarigen_cpu_to_sound_ready) result ^= 0x0200;
	result ^= h256 ^= 0x0400;
	return result;
}



/*************************************
 *
 *		Main CPU memory handlers
 *
 *************************************/

static struct MemoryReadAddress main_readmem[] =
{
	{ 0x000000, 0x03ffff, MRA_ROM },
	{ 0xff8000, 0xff8fff, MRA_BANK3 },
	{ 0xff9000, 0xffadff, MRA_BANK2 },
	{ 0xffae00, 0xffafff, MRA_BANK4 },
	{ 0xffb000, 0xffbfff, MRA_BANK5 },
	{ 0xffc000, 0xffc7ff, paletteram_word_r },
	{ 0xffd000, 0xffdfff, atarigen_eeprom_r },
	{ 0xffe000, 0xffe0ff, atarigen_sound_r },
	{ 0xffe100, 0xffe1ff, input_port_0_r },
	{ 0xffe200, 0xffe2ff, special_port1_r },
	{ -1 }  /* end of table */
};


static struct MemoryWriteAddress main_writemem[] =
{
	{ 0x000000, 0x03ffff, MWA_ROM },
	{ 0xff8000, 0xff8fff, MWA_BANK3, &atarigen_alpharam, &atarigen_alpharam_size },
	{ 0xff9000, 0xffadff, MWA_BANK2 },
	{ 0xffae00, 0xffafff, MWA_BANK4, &atarigen_spriteram, &atarigen_spriteram_size },
	{ 0xffb000, 0xffbfff, xybots_playfieldram_w, &atarigen_playfieldram, &atarigen_playfieldram_size },
	{ 0xffc000, 0xffc7ff, paletteram_IIIIRRRRGGGGBBBB_word_w, &paletteram },
	{ 0xffd000, 0xffdfff, atarigen_eeprom_w, &atarigen_eeprom, &atarigen_eeprom_size },
	{ 0xffe800, 0xffe8ff, atarigen_eeprom_enable_w },
	{ 0xffe900, 0xffe9ff, atarigen_sound_w },
	{ 0xffea00, 0xffeaff, watchdog_reset_w },
	{ 0xffeb00, 0xffebff, atarigen_video_int_ack_w },
	{ 0xffee00, 0xffeeff, atarigen_sound_reset_w },
	{ -1 }  /* end of table */
};



/*************************************
 *
 *		Port definitions
 *
 *************************************/

INPUT_PORTS_START( xybots_ports )
	PORT_START	/* ffe100 */
	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_BITX(0x0004, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER2, "P2 Twist Right", KEYCODE_W, IP_JOY_DEFAULT )
	PORT_BITX(0x0008, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2, "P2 Twist Left", KEYCODE_Q, IP_JOY_DEFAULT )
	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BITX(0x0400, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER1, "P1 Twist Right", KEYCODE_X, IP_JOY_DEFAULT )
	PORT_BITX(0x0800, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1, "P1 Twist Left", KEYCODE_Z, IP_JOY_DEFAULT )
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP    | IPF_PLAYER1 | IPF_8WAY )

	PORT_START	/* ffe200 */
	PORT_BIT( 0x00ff, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_SERVICE( 0x0100, IP_ACTIVE_LOW )
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_UNUSED ) 	/* /AUDBUSY */
	PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_UNUSED )	/* 256H */
	PORT_BIT( 0x0800, IP_ACTIVE_HIGH, IPT_VBLANK )	/* VBLANK */
	PORT_BIT( 0xf000, IP_ACTIVE_LOW, IPT_UNUSED )

	JSA_I_PORT_SWAPPED	/* audio port */
INPUT_PORTS_END



/*************************************
 *
 *		Graphics definitions
 *
 *************************************/

static struct GfxLayout anlayout =
{
	8,8,	/* 8*8 chars */
	512,	/* 512 chars */
	2,		/* 2 bits per pixel */
	{ 0, 4 },
	{ 0, 1, 2, 3, 8, 9, 10, 11 },
	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
	8*16	/* every char takes 16 consecutive bytes */
};


static struct GfxLayout pflayout =
{
	8,8,	/* 8*8 chars */
	8192,	/* 8192 chars */
	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	/* every char takes 32 consecutive bytes */
};


static struct GfxLayout molayout =
{
	8,8,	/* 8*8 chars */
	16384,	/* 16384 chars */
	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	/* every char takes 32 consecutive bytes */
};


static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ 2, 0x00000, &pflayout,      512, 16 },		/* playfield */
	{ 2, 0x40000, &molayout,      256, 48 },		/* sprites */
	{ 2, 0xc0000, &anlayout,        0, 64 },		/* characters 8x8 */
	{ -1 } /* end of array */
};



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

static struct MachineDriver machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_M68000,		/* verified */
			7159160,
			0,
			main_readmem,main_writemem,0,0,
			atarigen_video_int_gen,1
		},
		{
			JSA_I_CPU(1)
		}
	},
	60, DEFAULT_REAL_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,
	init_machine,

	/* video hardware */
	42*8, 30*8, { 0*8, 42*8-1, 0*8, 30*8-1 },
	gfxdecodeinfo,
	1024,1024,
	0,

	VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE | VIDEO_SUPPORTS_DIRTY | VIDEO_UPDATE_BEFORE_VBLANK,
	0,
	xybots_vh_start,
	xybots_vh_stop,
	xybots_vh_screenrefresh,

	/* sound hardware */
	JSA_I_STEREO
};



/*************************************
 *
 *		ROM definition(s)
 *
 *************************************/

ROM_START( xybots_rom )
	ROM_REGION(0x90000)	/* 8*64k for 68000 code */
	ROM_LOAD_EVEN( "2112.c17",     0x00000, 0x10000, 0x16d64748 )
	ROM_LOAD_ODD ( "2113.c19",     0x00000, 0x10000, 0x2677d44a )
	ROM_LOAD_EVEN( "2114.b17",     0x20000, 0x08000, 0xd31890cb )
	ROM_LOAD_ODD ( "2115.b19",     0x20000, 0x08000, 0x750ab1b0 )

	ROM_REGION(0x14000)	/* 64k for 6502 code */
	ROM_LOAD( "xybots.snd",   0x10000, 0x4000, 0x3b9f155d )
	ROM_CONTINUE(             0x04000, 0xc000 )

	ROM_REGION_DISPOSE(0xc2000)	/* temporary space for graphics (disposed after conversion) */
	ROM_LOAD( "2102.l13",     0x00000, 0x08000, 0xc1309674 )
	ROM_RELOAD(               0x08000, 0x08000 )
	ROM_LOAD( "2103.l11",     0x10000, 0x10000, 0x907c024d )
	ROM_LOAD( "2117.l7",      0x30000, 0x10000, 0x0cc9b42d )
	ROM_LOAD( "1105.de1",     0x40000, 0x10000, 0x315a4274 )
	ROM_LOAD( "1106.e1",      0x50000, 0x10000, 0x3d8c1dd2 )
	ROM_LOAD( "1107.f1",      0x60000, 0x10000, 0xb7217da5 )
	ROM_LOAD( "1108.fj1",     0x70000, 0x10000, 0x77ac65e1 )
	ROM_LOAD( "1109.j1",      0x80000, 0x10000, 0x1b482c53 )
	ROM_LOAD( "1110.k1",      0x90000, 0x10000, 0x99665ff4 )
	ROM_LOAD( "1111.kl1",     0xa0000, 0x10000, 0x416107ee )
	ROM_LOAD( "1101.c4",      0xc0000, 0x02000, 0x59c028a2 )
ROM_END



/*************************************
 *
 *		Driver initialization
 *
 *************************************/

static void xybots_init(void)
{
	atarigen_eeprom_default = NULL;
	atarigen_slapstic_init(0, 0x008000, 107);

	atarijsa_init(1, 2, 1, 0x0100);

	/* speed up the 6502 */
	atarigen_init_6502_speedup(1, 0x4157, 0x416f);

	/* display messages */
/*	atarigen_show_slapstic_message(); -- no known slapstic problems */
	atarigen_show_sound_message();
}



/*************************************
 *
 *		Game driver(s)
 *
 *************************************/

struct GameDriver xybots_driver =
{
	__FILE__,
	0,
	"xybots",
	"Xybots",
	"1987",
	"Atari Games",
	"Aaron Giles (MAME driver)\nAlan J. McCormick (hardware info)\nFrank Palazzolo (Slapstic decoding)",
	0,
	&machine_driver,
	xybots_init,

	xybots_rom,
	0,
	0,
	0,
	0,	/* sound_prom */

	xybots_ports,

	0, 0, 0,   /* colors, palette, colortable */
	ORIENTATION_DEFAULT,
	atarigen_hiload, atarigen_hisave
};
