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

	Thunderjaws

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

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


void thunderj_set_alpha_bank(int bank);
void thunderj_playfieldram_w(int offset, int data);
void thunderj_playfield2ram_w(int offset, int data);
void thunderj_colorram_w(int offset, int data);

int thunderj_vh_start(void);
void thunderj_vh_stop(void);
void thunderj_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);

void thunderj_scanline_update(int scanline);


static UINT8 *rts_address;



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

static void update_interrupts(void)
{
	int newstate = 0;
	int newstate2 = 0;

	if (atarigen_scanline_int_state)
		newstate |= 4, newstate2 |= 4;
	if (atarigen_sound_int_state)
		newstate |= 6;

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

	if (newstate2)
		cpu_set_irq_line(1, newstate2, ASSERT_LINE);
	else
		cpu_set_irq_line(1, 7, CLEAR_LINE);
}


static void init_machine(void)
{
	atarigen_eeprom_reset();
	atarigen_video_control_reset();
	atarigen_interrupt_reset(update_interrupts);
	atarigen_scanline_timer_reset(thunderj_scanline_update, 8);
	atarijsa_reset();
}



/*************************************
 *
 *		I/O handling
 *
 *************************************/

static int special_port2_r(int offset)
{
	int result = input_port_2_r(offset);

	if (atarigen_sound_to_cpu_ready) result ^= 0x0004;
	if (atarigen_cpu_to_sound_ready) result ^= 0x0008;
	result ^= 0x0010;

	return result;
}


static void latch_w(int offset, int data)
{
	/* reset extra CPU */
	if (!(data & 0x00ff0000))
	{
		/* 0 means hold CPU 2's reset low */
		if (!(data & 1))
		{
			cpu_halt(1, 0);
			cpu_reset(1);
		}
		else
			cpu_halt(1, 1);
		
		/* bits 2-5 are the alpha bank */
		thunderj_set_alpha_bank((data >> 2) & 7);
	}
}



/*************************************
 *
 *		Video Controller Hack
 *
 *************************************/

int thunderj_video_control_r(int offset)
{
	/* Sigh. CPU #1 reads the video controller register twice per frame, once at
	   the beginning of interrupt and once near the end. It stores these values in a
	   table starting at $163484. CPU #2 periodically looks at this table to make
	   sure that it is getting interrupts at the appropriate times, and that the
	   VBLANK bit is set appropriately. Unfortunately, due to all the cpu_yield()
	   calls we make to synchronize the two CPUs, we occasionally get out of time
	   and generate the interrupt outside of the tight tolerances CPU #2 expects.
	   
	   So we fake it. Returning scanlines $f5 and $f7 alternately provides the
	   correct answer that causes CPU #2 to be happy and not aggressively trash
	   memory (which is what it does if this interrupt test fails -- see the code
	   at $1E56 to see!) */

	/* Use these lines to detect when things go south:

	if (cpu_readmem24_word(0x163482) > 0xfff)
		printf("You're screwed!");*/

	return atarigen_video_control_r(offset);
}



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

static struct MemoryReadAddress main_readmem[] =
{
	{ 0x000000, 0x09ffff, MRA_ROM },
	{ 0x0e0000, 0x0e0fff, atarigen_eeprom_r },
	{ 0x160000, 0x16ffff, MRA_BANK1 },
	{ 0x260000, 0x26000f, input_port_0_r },
	{ 0x260010, 0x260011, input_port_1_r },
	{ 0x260012, 0x260013, special_port2_r },
	{ 0x260030, 0x260031, atarigen_sound_r },
	{ 0x3e0000, 0x3e0fff, paletteram_word_r },
	{ 0x3effc0, 0x3effff, thunderj_video_control_r, &atarigen_video_control_data },
	{ 0x3f0000, 0x3f5fff, MRA_BANK3 },
	{ 0x3f6000, 0x3f7fff, MRA_BANK4 },
	{ 0x3f8000, 0x3f8fff, MRA_BANK5 },
	{ 0x3f9000, 0x3fffff, MRA_BANK6 },
	{ 0x800000, 0x800001, MRA_BANK7, &rts_address },
	{ -1 }  /* end of table */
};


static struct MemoryWriteAddress main_writemem[] =
{
	{ 0x000000, 0x09ffff, MWA_ROM },
	{ 0x0e0000, 0x0e0fff, atarigen_eeprom_w, &atarigen_eeprom, &atarigen_eeprom_size },
	{ 0x160000, 0x16ffff, MWA_BANK1 },
	{ 0x1f0000, 0x1fffff, atarigen_eeprom_enable_w },
	{ 0x2e0000, 0x2e0001, watchdog_reset_w },
	{ 0x360010, 0x360011, latch_w },
	{ 0x360020, 0x360021, atarigen_sound_reset_w },
	{ 0x360030, 0x360031, atarigen_sound_w },
	{ 0x3e0000, 0x3e0fff, atarigen_666_paletteram_w, &paletteram },
	{ 0x3effc0, 0x3effff, atarigen_video_control_w },
	{ 0x3f0000, 0x3f1fff, thunderj_playfield2ram_w, &atarigen_playfield2ram, &atarigen_playfield2ram_size },
	{ 0x3f2000, 0x3f3fff, thunderj_playfieldram_w, &atarigen_playfieldram, &atarigen_playfieldram_size },
	{ 0x3f4000, 0x3f5fff, thunderj_colorram_w, &atarigen_playfieldram_color },
	{ 0x3f6000, 0x3f7fff, MWA_BANK4, &atarigen_spriteram, &atarigen_spriteram_size },
	{ 0x3f8000, 0x3f8fff, MWA_BANK5, &atarigen_alpharam, &atarigen_alpharam_size },
	{ 0x3f9000, 0x3fffff, MWA_BANK6 },
	{ -1 }  /* end of table */
};



/*************************************
 *
 *		Extra CPU memory handlers
 *
 *************************************/

static struct MemoryReadAddress extra_readmem[] =
{
	{ 0x000000, 0x03ffff, MRA_ROM },
	{ 0x060000, 0x07ffff, MRA_ROM },
	{ 0x160000, 0x16ffff, MRA_BANK1 },
	{ 0x260000, 0x26000f, input_port_0_r },
	{ 0x260010, 0x260011, input_port_1_r },
	{ 0x260012, 0x260013, special_port2_r },
	{ 0x260030, 0x260031, atarigen_sound_r },
	{ -1 }  /* end of table */
};


static struct MemoryWriteAddress extra_writemem[] =
{
	{ 0x000000, 0x03ffff, MWA_ROM },
	{ 0x060000, 0x07ffff, MWA_ROM },
	{ 0x160000, 0x16ffff, MWA_BANK1 },
	{ 0x360000, 0x360001, atarigen_video_int_ack_w },
	{ 0x360010, 0x360011, latch_w },
	{ 0x360020, 0x360021, atarigen_sound_reset_w },
	{ 0x360030, 0x360031, atarigen_sound_w },
	{ -1 }  /* end of table */
};



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

INPUT_PORTS_START( thunderj_ports )
	PORT_START		/* 260000 */
	PORT_BIT( 0xffff, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START		/* 260010 */
	PORT_BIT( 0x00ff, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
	PORT_BIT( 0x0c00, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER1 )
	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_PLAYER1 )
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_PLAYER1 )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_PLAYER1 )

	PORT_START		/* 260012 */
	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_VBLANK )
	PORT_SERVICE( 0x0002, IP_ACTIVE_LOW )
	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_UNUSED )	/* Input buffer full (@260030) */
	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_UNUSED )	/* Output buffer full (@360030) */
	PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_UNUSED )
	PORT_BIT( 0x00e0, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
	PORT_BIT( 0x0c00, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER2 )
	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_PLAYER2 )
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_PLAYER2 )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_PLAYER2 )

	JSA_II_PORT		/* audio board port */
INPUT_PORTS_END



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

static struct GfxLayout anlayout =
{
	8,8,	/* 8*8 chars */
	4096,	/* 4096 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 pfmolayout =
{
	8,8,	/* 8*8 sprites */
	32768,	/* 32768 of them */
	4,		/* 4 bits per pixel */
	{ 3*8*0x80000, 2*8*0x80000, 1*8*0x80000, 0*8*0x80000 },
	{ 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 sprite takes 8 consecutive bytes */
};


static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ 4, 0x000000, &pfmolayout,  512,  96 },	/* sprites & playfield */
	{ 4, 0x040000, &pfmolayout,  256, 112 },	/* sprites & playfield */
	{ 4, 0x200000, &anlayout,      0, 512 },	/* characters 8x8 */
	{ -1 } /* end of array */
};



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

static struct MachineDriver machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_M68000,		/* verified */
			7159160,		/* 7.159 Mhz */
			0,
			main_readmem,main_writemem,0,0,
			ignore_interrupt,1
		},
		{
			CPU_M68000,		/* verified */
			7159160,		/* 7.159 Mhz */
			1,
			extra_readmem,extra_writemem,0,0,
			ignore_interrupt,1
		},
		{
			JSA_II_CPU(2)
		}
	},
	60, DEFAULT_REAL_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	100,
	init_machine,

	/* video hardware */
	42*8, 30*8, { 0*8, 42*8-1, 0*8, 30*8-1 },
	gfxdecodeinfo,
	2048, 2048,
	0,

	VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE | VIDEO_UPDATE_BEFORE_VBLANK,
	0,
	thunderj_vh_start,
	thunderj_vh_stop,
	thunderj_vh_screenrefresh,

	/* sound hardware */
	JSA_II_MONO(3)
};



/*************************************
 *
 *		ROM decoding
 *
 *************************************/

static void rom_decode(void)
{
	int i;

	/* invert the graphics bits on the playfield and motion objects */
	for (i = 0; i < 0x200000; i++)
		Machine->memory_region[4][i] ^= 0xff;
	
	/* copy the shared ROM from region 0 to region 1 */
	memcpy(&Machine->memory_region[1][0x60000], &Machine->memory_region[0][0x60000], 0x20000);
}



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

static void thunderj_init(void)
{
	atarigen_eeprom_default = NULL;
	
	atarijsa_init(2, 3, 2, 0x0002);

	/* speed up the 6502 */
	atarigen_init_6502_speedup(2, 0x4159, 0x4171);
	
	/* it looks like they jsr to $800000 as some kind of protection */
	/* put an RTS there so we don't die */
	WRITE_WORD(rts_address, 0x4E75);

	/* display messages */
	atarigen_show_sound_message();
}



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

ROM_START( thunderj_rom )
	ROM_REGION(0xa0000)	/* 10*64k for 68000 code */
	ROM_LOAD_EVEN( "2001.14e",   0x00000, 0x10000, 0xf6a71532 )
	ROM_LOAD_ODD ( "2002.14c",   0x00000, 0x10000, 0x173ec10d )
	ROM_LOAD_EVEN( "2003.15e",   0x20000, 0x10000, 0x6e155469 )
	ROM_LOAD_ODD ( "2004.15c",   0x20000, 0x10000, 0xe9ff1e42 )
	ROM_LOAD_EVEN( "2005.16e",   0x40000, 0x10000, 0xa40242e7 )
	ROM_LOAD_ODD ( "2006.16c",   0x40000, 0x10000, 0xaa18b94c )
	ROM_LOAD_EVEN( "1005.15h",   0x60000, 0x10000, 0x05474ebb )
	ROM_LOAD_ODD ( "1010.16h",   0x60000, 0x10000, 0xccff21c8 )
	ROM_LOAD_EVEN( "1007.17e",   0x80000, 0x10000, 0x9c2a8aba )
	ROM_LOAD_ODD ( "1008.17c",   0x80000, 0x10000, 0x22109d16 )

	ROM_REGION(0x80000)	/* 8*64k for 68000 code */
	ROM_LOAD_EVEN( "1011.17l",   0x00000, 0x10000, 0xbbbbca45 )
	ROM_LOAD_ODD ( "1012.17n",   0x00000, 0x10000, 0x53e5e638 )

	ROM_REGION(0x14000)	/* 64k + 16k for 6502 code */
	ROM_LOAD( "tjw65snd.bin",  0x10000, 0x4000, 0xd8feb7fb )
	ROM_CONTINUE(              0x04000, 0xc000 )

	ROM_REGION(0x40000)	/* 256k for ADPCM */
	ROM_LOAD( "tj1016.bin",  0x00000, 0x10000, 0xc10bdf73 )
	ROM_LOAD( "tj1017.bin",  0x10000, 0x10000, 0x4e5e25e8 )
	ROM_LOAD( "tj1018.bin",  0x20000, 0x10000, 0xec81895d )
	ROM_LOAD( "tj1019.bin",  0x30000, 0x10000, 0xa4009037 )

	ROM_REGION_DISPOSE(0x210000)	/* temporary space for graphics (disposed after conversion) */
	ROM_LOAD( "1021.5s",   0x000000, 0x10000, 0xd8432766 )	/* graphics, plane 0 */
	ROM_LOAD( "1025.5r",   0x010000, 0x10000, 0x839feed5 )
	ROM_LOAD( "1029.3p",   0x020000, 0x10000, 0xfa887662 )
	ROM_LOAD( "1033.6p",   0x030000, 0x10000, 0x2addda79 )
	ROM_LOAD( "1037.2s",   0x040000, 0x10000, 0x07addba6 )
	ROM_LOAD( "1041.2r",   0x050000, 0x10000, 0x1e9c29e4 )
	ROM_LOAD( "1045.34s",  0x060000, 0x10000, 0xe7235876 )
	ROM_LOAD( "1049.34r",  0x070000, 0x10000, 0xa6eb8265 )

	ROM_LOAD( "1022.9s",   0x080000, 0x10000, 0xdcf50371 )	/* graphics, plane 1 */
	ROM_LOAD( "1026.9r",   0x090000, 0x10000, 0x216e72c8 )
	ROM_LOAD( "1030.10s",  0x0a0000, 0x10000, 0xdc51f606 )
	ROM_LOAD( "1034.10r",  0x0b0000, 0x10000, 0xf8e35516 )
	ROM_LOAD( "1038.6s",   0x0c0000, 0x10000, 0x2ea543f9 )
	ROM_LOAD( "1042.6r",   0x0d0000, 0x10000, 0xefabdc2b )
	ROM_LOAD( "1046.7s",   0x0e0000, 0x10000, 0x6692151f )
	ROM_LOAD( "1050.7r",   0x0f0000, 0x10000, 0xad7bb5f3 )

	ROM_LOAD( "1023.13s",  0x100000, 0x10000, 0xb6dc3f13 )	/* graphics, plane 2 */
	ROM_LOAD( "1027.13r",  0x110000, 0x10000, 0x621cc2ce )
	ROM_LOAD( "1031.14s",  0x120000, 0x10000, 0x4682ceb5 )
	ROM_LOAD( "1035.14r",  0x130000, 0x10000, 0x7a0e1b9e )
	ROM_LOAD( "1039.11s",  0x140000, 0x10000, 0xcb563a40 )
	ROM_LOAD( "1043.11r",  0x150000, 0x10000, 0xb7565eee )
	ROM_LOAD( "1047.12s",  0x160000, 0x10000, 0x60877136 )
	ROM_LOAD( "1051.12r",  0x170000, 0x10000, 0xd4715ff0 )

	ROM_LOAD( "1024.17s",  0x180000, 0x10000, 0xd84452b5 )	/* graphics, plane 3 */
	ROM_LOAD( "1028.17r",  0x190000, 0x10000, 0x0cc20245 )
	ROM_LOAD( "1032.14p",  0x1a0000, 0x10000, 0xf639161a )
	ROM_LOAD( "1036.16p",  0x1b0000, 0x10000, 0xb342443d )
	ROM_LOAD( "1040.15s",  0x1c0000, 0x10000, 0x6e910fc2 )
	ROM_LOAD( "1044.15r",  0x1d0000, 0x10000, 0xff67a17a )
	ROM_LOAD( "1048.16s",  0x1e0000, 0x10000, 0x200d45b3 )
	ROM_LOAD( "1052.16r",  0x1f0000, 0x10000, 0x74711ef1 )

	ROM_LOAD( "1020.4m",   0x200000, 0x10000, 0x65470354 )	/* alphanumerics */
ROM_END



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

struct GameDriver thunderj_driver =
{
	__FILE__,
	0,
	"thunderj",
	"ThunderJaws",
	"1990",
	"Atari Games",
	"Aaron Giles (MAME driver)",
	0,
	&machine_driver,
	thunderj_init,

	thunderj_rom,
	rom_decode,
	0,
	0,
	0,	/* sound_prom */

	thunderj_ports,

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