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

    Safari Rally hardware

    driver by Zsolt Vasvari

    Games Supported:
        * Safari Rally (Japan Ver.)
          (c)1979 Shin Nihon Kikaku

    Known issues/to-do's:
        * SN76477 discrete sound

    Notes:
        * This hardware is a precursor to Phoenix

          ----------------------------------

          CPU board

          76477        18MHz

                        8080

          ----------------------------------

          Video board


           RL07  2114
                 2114
                 2114
                 2114
                 2114           RL01 RL02
                 2114           RL03 RL04
                 2114           RL05 RL06
           RL08  2114

           11MHz

          ----------------------------------

Dumped by Chack'n
27/Jun/2009
modified by Hau
08/09/2009
****************************************************************************/

#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "sound/samples.h"

class safarir_state
{
public:
	static void *alloc(running_machine &machine) { return auto_alloc_clear(&machine, safarir_state(machine)); }

	safarir_state(running_machine &machine) { }

	UINT8 *ram_1, *ram_2;
	size_t ram_size;
	UINT8 ram_bank;
	tilemap_t *bg_tilemap;
	tilemap_t *fg_tilemap;
	UINT8 *bg_scroll;
	UINT8 port_last;
	UINT8 port_last2;
	running_device *samples;
};


/*************************************
 *
 *  RAM banking
 *
 *************************************/

static WRITE8_HANDLER( ram_w )
{
	safarir_state *state = (safarir_state *)space->machine->driver_data;

	if (state->ram_bank)
		state->ram_2[offset] = data;
	else
		state->ram_1[offset] = data;

	tilemap_mark_tile_dirty((offset & 0x0400) ? state->bg_tilemap : state->fg_tilemap, offset & 0x03ff);
}


static READ8_HANDLER( ram_r )
{
	safarir_state *state = (safarir_state *)space->machine->driver_data;

	return state->ram_bank ? state->ram_2[offset] : state->ram_1[offset];
}


static WRITE8_HANDLER( ram_bank_w )
{
	safarir_state *state = (safarir_state *)space->machine->driver_data;

	state->ram_bank = data & 0x01;

	tilemap_mark_all_tiles_dirty_all(space->machine);
}



/*************************************
 *
 *  Video system
 *
 *************************************/

static const gfx_layout charlayout =
{
	8,8,	/* 8*8 chars */
	128,	/* 128 characters */
	1,		/* 1 bit per pixel */
	{ 0 },
	{ 7, 6, 5, 4, 3, 2, 1, 0 },
	{ 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 GFXDECODE_START( safarir )
	GFXDECODE_ENTRY( "gfx1", 0, charlayout, 0, 8 )
	GFXDECODE_ENTRY( "gfx2", 0, charlayout, 0, 8 )
GFXDECODE_END


static PALETTE_INIT( safarir )
{
	int i;

	for (i = 0; i < machine->total_colors() / 2; i++)
	{
		palette_set_color(machine, (i * 2) + 0, RGB_BLACK);
		palette_set_color(machine, (i * 2) + 1, MAKE_RGB(pal1bit(i >> 2), pal1bit(i >> 1), pal1bit(i >> 0)));
	}
}

static TILE_GET_INFO( get_bg_tile_info )
{
	int color;
	const address_space *space = cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM);
	UINT8 code = ram_r(space,tile_index | 0x400);

	if (code & 0x80)
		color = 6;	/* yellow */
	else
	{
		color = ((~tile_index & 0x04) >> 2) | ((tile_index & 0x04) >> 1);

		if (~tile_index & 0x100)
			color |= ((tile_index & 0xc0) == 0x80) ? 1 : 0;
		else
			color |= (tile_index & 0xc0) ? 1 : 0;
	}

	SET_TILE_INFO(0, code & 0x7f, color, 0);
}


static TILE_GET_INFO( get_fg_tile_info )
{
	int color, flags;
	const address_space *space = cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM);

	UINT8 code = ram_r(space,tile_index);

	if (code & 0x80)
		color = 7;	/* white */
	else
		color = (~tile_index & 0x04) | ((tile_index >> 1) & 0x03);

	flags = ((tile_index & 0x1f) >= 0x03) ? 0 : TILE_FORCE_LAYER0;

	SET_TILE_INFO(1, code & 0x7f, color, flags);
}


static VIDEO_START( safarir )
{
	safarir_state *state = (safarir_state *)machine->driver_data;

	state->bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows, 8, 8, 32, 32);
	state->fg_tilemap = tilemap_create(machine, get_fg_tile_info, tilemap_scan_rows, 8, 8, 32, 32);

	tilemap_set_transparent_pen(state->fg_tilemap, 0);
}


static VIDEO_UPDATE( safarir )
{
	safarir_state *state = (safarir_state *)screen->machine->driver_data;

	tilemap_set_scrollx(state->bg_tilemap, 0, *state->bg_scroll);

	tilemap_draw(bitmap, cliprect, state->bg_tilemap, 0, 0);
	tilemap_draw(bitmap, cliprect, state->fg_tilemap, 0, 0);

	return 0;
}

/*************************************
 *
 *  Audio system
 *
 *************************************/

#define SAMPLE_SOUND1_1		0
#define SAMPLE_SOUND1_2		1
#define SAMPLE_SOUND2		2
#define SAMPLE_SOUND3		3
#define SAMPLE_SOUND4_1		4
#define SAMPLE_SOUND4_2		5
#define SAMPLE_SOUND5_1		6
#define SAMPLE_SOUND5_2		7
#define SAMPLE_SOUND6		8
#define SAMPLE_SOUND7		9
#define SAMPLE_SOUND8		10

#define CHANNEL_SOUND1		0
#define CHANNEL_SOUND2		1
#define CHANNEL_SOUND3		2
#define CHANNEL_SOUND4		3
#define CHANNEL_SOUND5		4
#define CHANNEL_SOUND6		5


static WRITE8_HANDLER( safarir_audio_w )
{
	safarir_state *state = (safarir_state *)space->machine->driver_data;
	running_device *samples = state->samples;
	UINT8 rising_bits = data & ~state->port_last;

	if (rising_bits == 0x12) sample_start(samples, CHANNEL_SOUND1, SAMPLE_SOUND1_1, 0);
	if (rising_bits == 0x02) sample_start(samples, CHANNEL_SOUND1, SAMPLE_SOUND1_2, 0);
	if (rising_bits == 0x95) sample_start(samples, CHANNEL_SOUND1, SAMPLE_SOUND6, 0);

	if (rising_bits == 0x04 && (data == 0x15 || data ==0x16)) sample_start(samples, CHANNEL_SOUND2, SAMPLE_SOUND2, 0);

	if (data == 0x5f && (rising_bits == 0x49 || rising_bits == 0x5f)) sample_start(samples, CHANNEL_SOUND3, SAMPLE_SOUND3, 1);
	if (data == 0x00 || rising_bits == 0x01) sample_stop(samples, CHANNEL_SOUND3);

	if (data == 0x13)
	{
		if ((rising_bits == 0x13 && state->port_last != 0x04) || (rising_bits == 0x01 && state->port_last == 0x12))
		{
			sample_start(samples, CHANNEL_SOUND4, SAMPLE_SOUND7, 0);
		}
		else if (rising_bits == 0x03 && state->port_last2 == 0x15 && !sample_playing(samples, CHANNEL_SOUND4))
		{
			sample_start(samples, CHANNEL_SOUND4, SAMPLE_SOUND4_1, 0);
		}
	}
	if (data == 0x53 && state->port_last == 0x55) sample_start(samples, CHANNEL_SOUND4, SAMPLE_SOUND4_2, 0);

	if (data == 0x1f && rising_bits == 0x1f) sample_start(samples, CHANNEL_SOUND5, SAMPLE_SOUND5_1, 0);
	if (data == 0x14 && (rising_bits == 0x14 || rising_bits == 0x04)) sample_start(samples, CHANNEL_SOUND5, SAMPLE_SOUND5_2, 0);

	if (data == 0x07 && rising_bits == 0x07 && !sample_playing(samples, CHANNEL_SOUND6))
		sample_start(samples, CHANNEL_SOUND6, SAMPLE_SOUND8, 0);

	state->port_last2 = state->port_last;
	state->port_last = data;
}


static const char *const safarir_sample_names[] =
{
	"*safarir",
	"sound1-1.wav",
	"sound1-2.wav",
	"sound2.wav",
	"sound3.wav",
	"sound4-1.wav",
	"sound4-2.wav",
	"sound5-1.wav",
	"sound5-2.wav",
	"sound6.wav",
	"sound7.wav",
	"sound8.wav",
	0
};


static const samples_interface safarir_samples_interface =
{
	6,	/* 6 channels */
	safarir_sample_names
};


static MACHINE_DRIVER_START( safarir_audio )
	MDRV_SPEAKER_STANDARD_MONO("mono")
	MDRV_SOUND_ADD("samples", SAMPLES, 0)
	MDRV_SOUND_CONFIG(safarir_samples_interface)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
MACHINE_DRIVER_END



/*************************************
 *
 *  Machine start
 *
 *************************************/

static MACHINE_START( safarir )
{
	safarir_state *state = (safarir_state *)machine->driver_data;

	state->ram_1 = auto_alloc_array(machine, UINT8, state->ram_size);
	state->ram_2 = auto_alloc_array(machine, UINT8, state->ram_size);
	state->port_last = 0;
	state->port_last2 = 0;
	state->samples = machine->device("samples");

	/* setup for save states */
	state_save_register_global_pointer(machine, state->ram_1, state->ram_size);
	state_save_register_global_pointer(machine, state->ram_2, state->ram_size);
	state_save_register_global(machine, state->ram_bank);
	state_save_register_global(machine, state->port_last);
	state_save_register_global(machine, state->port_last2);
}



/*************************************
 *
 *  Memory handlers
 *
 *************************************/

static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x17ff) AM_ROM
	AM_RANGE(0x2000, 0x27ff) AM_READWRITE(ram_r, ram_w) AM_SIZE_MEMBER(safarir_state,ram_size)
	AM_RANGE(0x2800, 0x2800) AM_MIRROR(0x03ff) AM_READNOP AM_WRITE(ram_bank_w)
	AM_RANGE(0x2c00, 0x2cff) AM_MIRROR(0x03ff) AM_READNOP AM_WRITEONLY AM_BASE_MEMBER(safarir_state,bg_scroll)
	AM_RANGE(0x3000, 0x30ff) AM_MIRROR(0x03ff) AM_WRITE(safarir_audio_w)	/* goes to SN76477 */
	AM_RANGE(0x3400, 0x3400) AM_MIRROR(0x03ff) AM_WRITENOP	/* cleared at the beginning */
	AM_RANGE(0x3800, 0x38ff) AM_MIRROR(0x03ff) AM_READ_PORT("INPUTS") AM_WRITENOP
	AM_RANGE(0x3c00, 0x3cff) AM_MIRROR(0x03ff) AM_READ_PORT("DSW") AM_WRITENOP
ADDRESS_MAP_END



/*************************************
 *
 *  Port definition
 *
 *************************************/

static INPUT_PORTS_START( safarir )
	PORT_START("INPUTS")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_2WAY
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_2WAY
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("DSW")
	PORT_DIPNAME( 0x03, 0x00, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "3" )
	PORT_DIPSETTING(    0x01, "4" )
	PORT_DIPSETTING(    0x02, "5" )
	PORT_DIPSETTING(    0x03, "6" )
	PORT_DIPNAME( 0x0c, 0x04, "Acceleration Rate" )
	PORT_DIPSETTING(    0x00, "Slowest" )
	PORT_DIPSETTING(    0x04, "Slow" )
	PORT_DIPSETTING(    0x08, "Fast" )
	PORT_DIPSETTING(    0x0c, "Fastest" )
	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x60, 0x20, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x00, "3000" )
	PORT_DIPSETTING(    0x20, "5000" )
	PORT_DIPSETTING(    0x40, "7000" )
	PORT_DIPSETTING(    0x60, "9000" )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_VBLANK )
INPUT_PORTS_END



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

static MACHINE_DRIVER_START( safarir )

	MDRV_DRIVER_DATA( safarir_state )

	/* basic machine hardware */
	MDRV_CPU_ADD("maincpu", I8085A, 18000000/8)	/* 2.25 MHz ? */
	MDRV_CPU_PROGRAM_MAP(main_map)

	MDRV_MACHINE_START(safarir)

	/* video hardware */
	MDRV_VIDEO_START(safarir)
	MDRV_VIDEO_UPDATE(safarir)
	MDRV_PALETTE_INIT(safarir)
	MDRV_PALETTE_LENGTH(2*8)
	MDRV_GFXDECODE(safarir)

	MDRV_SCREEN_ADD("screen", RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 26*8-1)
	MDRV_SCREEN_REFRESH_RATE(60)

	/* audio hardware */
	MDRV_IMPORT_FROM(safarir_audio)
MACHINE_DRIVER_END



/*************************************
 *
 *  ROM definition
 *
 *************************************/

/*
Safari Rally (Japan Ver.)
(c)1979 Shin Nihon Kikaku

----------------------------------------
Top
RLO70002
RLN00001
CPU:M5L8080AP
SND:SN76477N
18.000MHz
----------------------------------------
Bottom
RLO70003
RLN00002
11.000MHz
----------------------------------------
RL-01.9      [cf7703c9]
RL-02.1      [1013ecd3]
RL-03.10     [84545894]
RL-04.2      [5dd12f96]
RL-05.11     [935ed469]
RL-06.3      [24c1cd42]

RL-07.40     [ba525203]
RL-08.43     [d6a50aac]

--- Team Japump!!! ---
*/

ROM_START( safarir )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "rl-01.9",  0x0000, 0x0400, CRC(cf7703c9) SHA1(b4182df9332b355edaa518462217a6e31e1c07b2) )
	ROM_LOAD( "rl-02.1",  0x0400, 0x0400, CRC(1013ecd3) SHA1(2fe367db8ca367b36c5378cb7d5ff918db243c78) )
	ROM_LOAD( "rl-03.10", 0x0800, 0x0400, CRC(84545894) SHA1(377494ceeac5ad58b70f77b2b27b609491cb7ffd) )
	ROM_LOAD( "rl-04.2",  0x0c00, 0x0400, CRC(5dd12f96) SHA1(a80ac0705648f0807ea33e444fdbea450bf23f85) )
	ROM_LOAD( "rl-05.11", 0x1000, 0x0400, CRC(935ed469) SHA1(052a59df831dcc2c618e9e5e5fdfa47548550596) )
	ROM_LOAD( "rl-06.3",  0x1400, 0x0400, CRC(24c1cd42) SHA1(fe32ecea77a3777f8137ca248b8f371db37b8b85) )

	ROM_REGION( 0x0400, "gfx1", 0 )
	ROM_LOAD( "rl-08.43", 0x0000, 0x0400, CRC(d6a50aac) SHA1(0a0c2cefc556e4e15085318fcac485b82bac2416) )

	ROM_REGION( 0x0400, "gfx2", 0 )
	ROM_LOAD( "rl-07.40", 0x0000, 0x0400, CRC(ba525203) SHA1(1c261cc1259787a7a248766264fefe140226e465) )
ROM_END



/*************************************
 *
 *  Game driver
 *
 *************************************/

GAME( 1979, safarir, 0, safarir, safarir, 0, ROT90, "SNK", "Safari Rally (Japan)", GAME_SUPPORTS_SAVE | GAME_IMPERFECT_SOUND )
