/*
To Do:
- get sound working
- map and test any remaining input ports

Looping
(C)1981 Venture Line

    Main CPU
        TMS9995

    COP420 Microcontroller
        manages CPU communnication?

    Sound CPU
        TMS9980
        AY-3-8910
        TMS5220 (SPEECH)

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

Sky Bumper
(C)1982 Venture Line

    This is a ROM swap for Looping.  There are two 6116's on
    the CPU board, where there is only one on Looping.

===============================================================

LOOPING CHIP PLACEMENT

THERE ARE AT LEAST TWO VERSIONS OF THIS GAME
VERSION NUMBERS FOR THIS PURPOSE ARE CHOSEN AT RANDOM

IC NAME   POSITION   BOARD  TYPE   IC NAME  POSITION  TYPE
VER-1                         VER-2
---------------------------------------------------------------
LOS-2-7   13A        I/O    2532    SAME    13A       2532
LOS-1-1-2 11A         "      "      SAME    11A        "
LOS-3-1   13C         "      "      I-O-V2  13C        "

VLI1      2A         ROM    2764    VLI-7-1 2A         "
VLI3      5A          "      "      VLI-7-2 4A         "
VLI9-5    8A          "      "      VLI-4-3 5A         "
L056-6    9A          "      "      VLI-8-4 7A         "
                      "             LO56-5  8A         "
                      "             LO56-6  9A         "
                      "             VLI-8-7 10A        "
                  ON RIBBON CABLE   18S030  11B             color prom?
                     REAR BD      LOG.1-9-3 6A        2716  tiles
                                  LOG.3     8A         "    tiles
*/

#include "driver.h"
#include "sound/ay8910.h"
#include "sound/dac.h"
#include "sound/5220intf.h"
#include "video/resnet.h"


/*************************************
 *
 *  Constants
 *
 *************************************/

#define MAIN_CPU_CLOCK		(12000000)
#define SOUND_CLOCK			(8000000)
#define COP_CLOCK			(1000000)		/* unknown */
#define TMS_CLOCK			(640000)

/* the schematics are very blurry here and don't actually specify the clock */
/* values; however, everything else about the sync chain implies the standard */
/* 18.432MHz master clock, like is used in similar hardware of the time */
#define MASTER_CLOCK		(18432000)

#define PIXEL_CLOCK			(MASTER_CLOCK/3)

#define HTOTAL				(384)
#define HBEND				(0)
#define HBSTART				(256)

#define VTOTAL				(264)
#define VBEND				(16)
#define VBSTART				(224+16)



/*************************************
 *
 *  Type definitions
 *
 *************************************/

typedef struct _looping_state looping_state;
struct _looping_state
{
	/* memory pointers */
	UINT8 *		videoram;
	UINT8 *		colorram;
	UINT8 *		spriteram;

	/* tilemaps */
	tilemap *	bg_tilemap;

	/* sound state */
	UINT8		sound[8];
};



/*************************************
 *
 *  Palette conversion
 *
 *************************************/

PALETTE_INIT( looping )
{
	static const int resistances[3] = { 1000, 470, 220 };
	double rweights[3], gweights[3], bweights[2];
	int i;

	/* compute the color output resistor weights */
	compute_resistor_weights(0,	255, -1.0,
			3,	&resistances[0], rweights, 470, 0,
			3,	&resistances[0], gweights, 470, 0,
			2,	&resistances[1], bweights, 470, 0);

	/* initialize the palette with these colors */
	for (i = 0; i < 32; i++)
	{
		int bit0, bit1, bit2, r, g, b;

		/* red component */
		bit0 = (color_prom[i] >> 0) & 1;
		bit1 = (color_prom[i] >> 1) & 1;
		bit2 = (color_prom[i] >> 2) & 1;
		r = combine_3_weights(rweights, bit0, bit1, bit2);

		/* green component */
		bit0 = (color_prom[i] >> 3) & 1;
		bit1 = (color_prom[i] >> 4) & 1;
		bit2 = (color_prom[i] >> 5) & 1;
		g = combine_3_weights(gweights, bit0, bit1, bit2);

		/* blue component */
		bit0 = (color_prom[i] >> 6) & 1;
		bit1 = (color_prom[i] >> 7) & 1;
		b = combine_2_weights(bweights, bit0, bit1);

		palette_set_color(machine, i, MAKE_RGB(r, g, b));
	}
}



/*************************************
 *
 *  Video startup/tilemap config
 *
 *************************************/

static TILE_GET_INFO( get_tile_info )
{
	looping_state *state = Machine->driver_data;
	int tile_number = state->videoram[tile_index];
	int color = state->colorram[(tile_index & 0x1f) * 2 + 1] & 0x07;
	SET_TILE_INFO(0, tile_number, color, 0);
}


VIDEO_START( looping )
{
	looping_state *state = machine->driver_data;

	state->bg_tilemap = tilemap_create(get_tile_info, tilemap_scan_rows, TILEMAP_OPAQUE, 8,8, 32,32);

	tilemap_set_scroll_cols(state->bg_tilemap, 0x20);
}



/*************************************
 *
 *  Video write handlers
 *
 *************************************/

static WRITE8_HANDLER( flip_screen_x_w )
{
	looping_state *state = Machine->driver_data;
	flip_screen_x_set(~data & 0x01);
	tilemap_set_scrollx(state->bg_tilemap, 0, flip_screen ? 128 : 0);
}


static WRITE8_HANDLER( flip_screen_y_w )
{
	looping_state *state = Machine->driver_data;
	flip_screen_y_set(~data & 0x01);
	tilemap_set_scrollx(state->bg_tilemap, 0, flip_screen ? 128 : 0);
}


WRITE8_HANDLER( looping_videoram_w )
{
	looping_state *state = Machine->driver_data;
	state->videoram[offset] = data;
	tilemap_mark_tile_dirty(state->bg_tilemap, offset);
}


WRITE8_HANDLER( looping_colorram_w )
{
	looping_state *state = Machine->driver_data;
	int i;

	state->colorram[offset] = data;

	/* odd bytes are column color attribute */
	if (offset & 1)
	{
		/* mark the whole column dirty */
		offs_t offs = (offset/2);
		for (i = 0; i < 0x20; i++)
			tilemap_mark_tile_dirty(state->bg_tilemap, i * 0x20 + offs);
	}

	/* even bytes are column scroll */
	else
		tilemap_set_scrolly(state->bg_tilemap, offset/2, data);
}



/*************************************
 *
 *  Video update
 *
 *************************************/

static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect)
{
	const UINT8 *source;
	looping_state *state = machine->driver_data;

	for (source = state->spriteram; source < state->spriteram + 0x40; source += 4)
	{
		int sx = source[3];
		int sy = 240 - source[0];
		int flipx = source[1] & 0x40;
		int flipy = source[1] & 0x80;
		int code  = source[1] & 0x3f;
		int color = source[2];

		if (flip_screen_x)
		{
			sx = 240 - sx;
			flipx = !flipx;
		}

		if (flip_screen_y)
		{
			sy = 240 - sy;
			flipy = !flipy;
		}

		drawgfx(bitmap, machine->gfx[1], code, color, flipx, flipy, sx, sy, cliprect, TRANSPARENCY_PEN, 0);
	}
}


VIDEO_UPDATE( looping )
{
	looping_state *state = machine->driver_data;
	tilemap_draw(bitmap, cliprect, state->bg_tilemap, 0, 0);

	draw_sprites(machine, bitmap, cliprect);
	return 0;
}



/*************************************
 *
 *  Machine init/reset
 *
 *************************************/

static MACHINE_START( looping )
{
	looping_state *state = machine->driver_data;
	state_save_register_global_array(state->sound);
}



/*************************************
 *
 *  Interrupt handling
 *
 *************************************/

INTERRUPT_GEN( looping_interrupt )
{
	cpunum_set_input_line_and_vector(0, 0, ASSERT_LINE, 4);
}


static WRITE8_HANDLER( level2_irq_set )
{
	if (!(data & 1))
		cpunum_set_input_line_and_vector(0, 0, ASSERT_LINE, 4);
}


static WRITE8_HANDLER( main_irq_ack_w )
{
	if (data == 0)
		cpunum_set_input_line(0, 0, CLEAR_LINE);
}


WRITE8_HANDLER( looping_souint_clr )
{
	if (data == 0)
		cpunum_set_input_line(1, 0, CLEAR_LINE);
}


void looping_spcint(int state)
{
	cpunum_set_input_line_and_vector(1, 0, state, 6);
}


static WRITE8_HANDLER( looping_soundlatch_w )
{
	soundlatch_w(offset, data);
	cpunum_set_input_line_and_vector(1, 0, ASSERT_LINE, 4);
}



/*************************************
 *
 *  Custom DAC handling
 *
 *************************************/

WRITE8_HANDLER( looping_sound_sw )
{
	/* this can be improved by adding the missing signals for decay etc. (see schematics)

        0001 = ASOV
        0002 = AVOL2
        0003 = AVOL1
        0004 = ADECAY1
        0005 = ADECAY
        0006 = ASA
        0007 = AFA
    */

	looping_state *state = Machine->driver_data;
	state->sound[offset + 1] = data ^ 1;
	DAC_data_w(0, ((state->sound[2] << 7) + (state->sound[3] << 6)) * state->sound[7]);
}



/*************************************
 *
 *  Sound controls
 *
 *************************************/

static WRITE8_HANDLER( ay_enable_w )
{
	int output;

	for (output = 0; output < 3; output++)
		sndti_set_output_gain(SOUND_AY8910, 0, output, (data & 1) ? 1.0 : 0.0);
}


static WRITE8_HANDLER( speech_enable_w )
{
	sndti_set_output_gain(SOUND_TMS5220, 0, 0, (data & 1) ? 1.0 : 0.0);
}


static WRITE8_HANDLER( ballon_enable_w )
{
static int last;
	if (last != data)
		mame_printf_debug("ballon_enable_w = %d\n", data);
	last = data;
}



/*************************************
 *
 *  Misc I/O
 *
 *************************************/

static WRITE8_HANDLER( out_0_w ) { mame_printf_debug("out0 = %02X\n", data); }
static WRITE8_HANDLER( out_2_w ) { mame_printf_debug("out2 = %02X\n", data); }

static READ8_HANDLER( adc_r )  { mame_printf_debug("%04X:ADC read\n", activecpu_get_pc()); return 0xff; }
static WRITE8_HANDLER( adc_w ) { mame_printf_debug("%04X:ADC write = %02X\n", activecpu_get_pc(), data); }

static WRITE8_HANDLER( plr2_w )
{
	/* set to 1 after IDLE, cleared to 0 during processing */
	/* is this an LED on the PCB? */
}



/*************************************
 *
 *  Protection
 *
 *************************************/

static READ8_HANDLER( protection_r )
{
	/*
        The code reads ($7002) ($7004) alternately
        The result must change at least once every 10 reads
        A read from ($34b0 + result) must == $01

        Valid values:
            $61 $67
            $B7 $BF
            $DB
            $E1
            $F3 $F7 $FD $FF

        Because they read alternately from different locations,
        it is trivial to bypass the protection.
    */
	if (offset == 2)
		return 0xf3;
	else
		return 0xf7;
}



/*************************************
 *
 *  Address maps
 *
 *************************************/

static ADDRESS_MAP_START( looping_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM

	AM_RANGE(0x9000, 0x93ff) AM_READWRITE(MRA8_RAM, looping_videoram_w) AM_BASE_MEMBER(looping_state, videoram)

	AM_RANGE(0x9800, 0x983f) AM_MIRROR(0x0700) AM_READWRITE(MRA8_RAM, looping_colorram_w) AM_BASE_MEMBER(looping_state, colorram)
	AM_RANGE(0x9840, 0x987f) AM_MIRROR(0x0700) AM_RAM AM_BASE_MEMBER(looping_state, spriteram)
	AM_RANGE(0x9880, 0x98ff) AM_MIRROR(0x0700) AM_RAM

	AM_RANGE(0xb001, 0xb001) AM_MIRROR(0x07f8) AM_WRITE(level2_irq_set)
	AM_RANGE(0xb006, 0xb006) AM_MIRROR(0x07f8) AM_WRITE(flip_screen_x_w)
	AM_RANGE(0xb007, 0xb007) AM_MIRROR(0x07f8) AM_WRITE(flip_screen_y_w)

	AM_RANGE(0xe000, 0xefff) AM_RAM
	AM_RANGE(0xf800, 0xf800) AM_MIRROR(0x03fc) AM_READWRITE(input_port_0_r, out_0_w) /* /OUT0 */
	AM_RANGE(0xf801, 0xf801) AM_MIRROR(0x03fc) AM_READWRITE(input_port_1_r, looping_soundlatch_w) /* /OUT1 */
	AM_RANGE(0xf802, 0xf802) AM_MIRROR(0x03fc) AM_READWRITE(input_port_2_r, out_2_w) /* /OUT2 */
	AM_RANGE(0xf803, 0xf803) AM_MIRROR(0x03fc) AM_READWRITE(adc_r, adc_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START( looping_io_map, ADDRESS_SPACE_IO, 8 )
	/* 400 = A16 */
	/* 401 = A17 */
	/* 402 = COLOR 9 */
	AM_RANGE(0x403, 0x403) AM_WRITE(plr2_w)
	/* 404 = C0 */
	/* 405 = C1 */
	AM_RANGE(0x406, 0x406) AM_WRITE(main_irq_ack_w)
	AM_RANGE(0x407, 0x407) AM_WRITE(watchdog_reset_w)

	AM_RANGE(0x10000, 0x10000) AM_NOP		/* external IDLE signal -- we can ignore it */
ADDRESS_MAP_END


/* complete memory map derived from schematics */
static ADDRESS_MAP_START( looping_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	ADDRESS_MAP_FLAGS( AMEF_ABITS(14) )
	AM_RANGE(0x0000, 0x37ff) AM_ROM
	AM_RANGE(0x3800, 0x3bff) AM_RAM
	AM_RANGE(0x3c00, 0x3c00) AM_MIRROR(0x00f4) AM_READWRITE(AY8910_read_port_0_r, AY8910_control_port_0_w)
	AM_RANGE(0x3c02, 0x3c02) AM_MIRROR(0x00f4) AM_READWRITE(MRA8_NOP, AY8910_write_port_0_w)
	AM_RANGE(0x3c03, 0x3c03) AM_MIRROR(0x00f6) AM_NOP
	AM_RANGE(0x3e00, 0x3e00) AM_MIRROR(0x00f4) AM_READWRITE(MRA8_NOP, tms5220_data_w)
	AM_RANGE(0x3e02, 0x3e02) AM_MIRROR(0x00f4) AM_READWRITE(tms5220_status_r, MWA8_NOP)
	AM_RANGE(0x3e03, 0x3e03) AM_MIRROR(0x00f6) AM_NOP
ADDRESS_MAP_END

static ADDRESS_MAP_START( looping_sound_io_map, ADDRESS_SPACE_IO, 8 )
	AM_RANGE(0x000, 0x000) AM_WRITE(looping_souint_clr)
	AM_RANGE(0x001, 0x007) AM_WRITE(looping_sound_sw)
	AM_RANGE(0x008, 0x008) AM_WRITE(ay_enable_w)
	AM_RANGE(0x009, 0x009) AM_WRITE(speech_enable_w)
	AM_RANGE(0x00a, 0x00a) AM_WRITE(ballon_enable_w)
ADDRESS_MAP_END


/* standard COP420 map */
static ADDRESS_MAP_START( looping_cop_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x03ff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START( looping_cop_data_map, ADDRESS_SPACE_DATA, 8 )
	AM_RANGE(0x0000, 0x003f) AM_RAM
ADDRESS_MAP_END



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

static const gfx_layout sprite_layout =
{
	16,16,
	RGN_FRAC(1,2),
	2,
	{ RGN_FRAC(1,2), RGN_FRAC(0,2) },
	{ STEP8(0,1), STEP8(64,1) },
	{ STEP8(0,8), STEP8(128,8) },
	8*8*4
};


static const gfx_decode looping_gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &gfx_8x8x2_planar, 0, 8 },
	{ REGION_GFX1, 0, &sprite_layout,    0, 8 },
	{ -1 }
};



/*************************************
 *
 *  Sound interfaces
 *
 *************************************/

static struct TMS5220interface tms5220_interface =
{
	looping_spcint
};

static struct AY8910interface ay8910_interface =
{
	soundlatch_r
};



/*************************************
 *
 *  Machine drivers
 *
 *************************************/

static MACHINE_DRIVER_START( looping )
	MDRV_DRIVER_DATA(looping_state)

	/* basic machine hardware */
	MDRV_CPU_ADD(TMS9995, MAIN_CPU_CLOCK)
	MDRV_CPU_PROGRAM_MAP(looping_map,0)
	MDRV_CPU_IO_MAP(looping_io_map,0)
	MDRV_CPU_VBLANK_INT(looping_interrupt,1)

	MDRV_CPU_ADD(TMS9980, SOUND_CLOCK/4)
	MDRV_CPU_PROGRAM_MAP(looping_sound_map,0)
	MDRV_CPU_IO_MAP(looping_sound_io_map,0)

	MDRV_CPU_ADD(COP420, COP_CLOCK)
	MDRV_CPU_PROGRAM_MAP(looping_cop_map,0)
	MDRV_CPU_DATA_MAP(looping_cop_data_map,0)

	MDRV_MACHINE_START(looping)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL, VBEND, VBSTART)
	MDRV_GFXDECODE(looping_gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(32)

	MDRV_PALETTE_INIT(looping)
	MDRV_VIDEO_START(looping)
	MDRV_VIDEO_UPDATE(looping)

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

	MDRV_SOUND_ADD(AY8910, SOUND_CLOCK/4)
	MDRV_SOUND_CONFIG(ay8910_interface)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.20)

	MDRV_SOUND_ADD(TMS5220, TMS_CLOCK)
	MDRV_SOUND_CONFIG(tms5220_interface)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)

	MDRV_SOUND_ADD(DAC, 0)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
MACHINE_DRIVER_END



/*************************************
 *
 *  Input ports
 *
 *************************************/

INPUT_PORTS_START( looping )
	PORT_START_TAG("IN0")
	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_BUTTON1 ) PORT_NAME("P1 Shoot")
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("P1 Accelerate?")
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN2 )

	PORT_START_TAG("IN1") /* cocktail? */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0x18, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL
	PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START_TAG("DSW0")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 1C_1C ) )
	PORT_DIPNAME( 0x0e, 0x02, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x0e, DEF_STR( 1C_7C ) )
	PORT_DIPSETTING(    0x00, "1 Coin/10 Credits" )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )		// Check code at 0x2c00
	PORT_DIPSETTING(	0x00, DEF_STR( No ) )
	PORT_DIPSETTING(	0x10, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "3" )
	PORT_DIPSETTING(    0x20, "5" )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
INPUT_PORTS_END

/* Same as 'looping' but additional "Infinite Lives" Dip Switch */
INPUT_PORTS_START( skybump )
	PORT_INCLUDE(looping)

	PORT_MODIFY("DSW0")
	PORT_DIPNAME( 0x60, 0x40, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x40, "3" )
	PORT_DIPSETTING(    0x60, "5" )
	PORT_DIPSETTING(    0x00, "Infinite (Cheat)")
//  PORT_DIPSETTING(    0x20, "Infinite (Cheat)")
INPUT_PORTS_END



/*************************************
 *
 *  ROM definitions
 *
 *************************************/

ROM_START( looping )
	ROM_REGION( 0x8000, REGION_CPU1, 0 ) /* TMS9995 code */
	ROM_LOAD( "vli3.5a",		0x0000, 0x2000, CRC(1ac3ccdf) SHA1(9d1cde8bd4d0f12eaf06225b3ecc4a5c3e4f0c11) )
	ROM_LOAD( "vli1.2a",		0x2000, 0x2000, CRC(97755fd4) SHA1(4a6ef02b0128cd516ff95083a7caaad8f3756f09) )
	ROM_LOAD( "l056-6.9a",		0x4000, 0x2000, CRC(548afa52) SHA1(0b88ac7394feede023519c585a4084591eb9661a) )
	ROM_LOAD( "vli9-5.8a",		0x6000, 0x2000, CRC(5d122f86) SHA1(d1c66b890142bb4d4648f3edec6567f58107dbf0) )

	ROM_REGION( 0x3800, REGION_CPU2, 0 ) /* TMS9980 code */
	ROM_LOAD( "i-o.13c",		0x0000, 0x0800, CRC(21e9350c) SHA1(f30a180309e373a17569351944f5e7982c3b3f9d) )
	ROM_LOAD( "i-o.13a",		0x0800, 0x1000, CRC(1de29f25) SHA1(535acb132266d6137b0610ee9a9b946459ae44af) )
	ROM_LOAD( "i-o.11a",		0x2800, 0x1000, CRC(61c74c79) SHA1(9f34d18a919446dd76857b851cea23fc1526f3c2) ) /* speech */

	ROM_REGION( 0x1000, REGION_CPU3, 0 ) /* COP420 microcontroller code */
	ROM_LOAD( "cop.bin",		0x0000, 0x1000, CRC(bbfd26d5) SHA1(5f78b32b6e7c003841ef5b635084db2cdfebf0e1) )

	ROM_REGION( 0x1000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "log2.8a",		0x0000, 0x800, CRC(ef3284ac) SHA1(8719c9df8c972a56c306b3c707aaa53092ffa2d6) )
	ROM_LOAD( "log1-9-3.6a",	0x0800, 0x800, CRC(c434c14c) SHA1(3669aaf7adc6b250378bcf62eb8e7058f55476ef) )

	ROM_REGION( 0x0020, REGION_PROMS, 0 ) /* color prom */
	ROM_LOAD( "18s030.11b",		0x0000, 0x0020, CRC(6a0c7d87) SHA1(140335d85c67c75b65689d4e76d29863c209cf32) )
ROM_END

ROM_START( loopinga )
	ROM_REGION( 0x8000, REGION_CPU1, 0 ) /* TMS9995 code */
	ROM_LOAD( "vli3.5a",		0x0000, 0x2000, CRC(1ac3ccdf) SHA1(9d1cde8bd4d0f12eaf06225b3ecc4a5c3e4f0c11) )
	ROM_LOAD( "vli-4-3",		0x2000, 0x1000, CRC(f32cae2b) SHA1(2c6ef82af438e588b56fd58b95cf969c97bb9a66) )
	ROM_LOAD( "vli-8-4",		0x3000, 0x1000, CRC(611e1dbf) SHA1(0ab6669f1dec30c3f7bca49e158e4790a78fa308) )
	ROM_LOAD( "l056-6.9a",		0x4000, 0x2000, CRC(548afa52) SHA1(0b88ac7394feede023519c585a4084591eb9661a) )
	ROM_LOAD( "vli9-5.8a",		0x6000, 0x2000, CRC(5d122f86) SHA1(d1c66b890142bb4d4648f3edec6567f58107dbf0) )

	ROM_REGION( 0x3800, REGION_CPU2, 0 ) /* TMS9980 code */
	ROM_LOAD( "i-o-v2.13c",		0x0000, 0x0800, CRC(09765ebe) SHA1(93b035c3a94f2f6d5e463256e26b600a4dd5d3ea) )
    ROM_LOAD( "i-o.13a",		0x0800, 0x1000, CRC(1de29f25) SHA1(535acb132266d6137b0610ee9a9b946459ae44af) ) /* speech */
	ROM_LOAD( "i-o.11a",		0x2800, 0x1000, CRC(61c74c79) SHA1(9f34d18a919446dd76857b851cea23fc1526f3c2) )

	ROM_REGION( 0x1000, REGION_CPU3, 0 ) /* COP420 microcontroller code */
	ROM_LOAD( "cop.bin",		0x0000, 0x1000, CRC(bbfd26d5) SHA1(5f78b32b6e7c003841ef5b635084db2cdfebf0e1) )

	ROM_REGION( 0x1000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "log2.8a",		0x0000, 0x800, CRC(ef3284ac) SHA1(8719c9df8c972a56c306b3c707aaa53092ffa2d6) )
	ROM_LOAD( "log1-9-3.6a",	0x0800, 0x800, CRC(c434c14c) SHA1(3669aaf7adc6b250378bcf62eb8e7058f55476ef) )

	ROM_REGION( 0x0020, REGION_PROMS, 0 ) /* color prom */
	ROM_LOAD( "18s030.11b",		0x0000, 0x0020, CRC(6a0c7d87) SHA1(140335d85c67c75b65689d4e76d29863c209cf32) )
ROM_END

ROM_START( skybump )
	ROM_REGION( 0x8000, REGION_CPU1, 0 ) /* TMS9995 code */
	ROM_LOAD( "cpu.5a",			0x0000, 0x2000, CRC(dca38df0) SHA1(86abe04cbabf81399f842f53668fe7a3f7ed3757) )
	ROM_LOAD( "cpu.2a",			0x2000, 0x2000, CRC(6bcc211a) SHA1(245ebae3934df9c3920743a941546d96bb2e7c03) )
	ROM_LOAD( "cpu.9a",			0x4000, 0x2000, CRC(c7a50797) SHA1(60aa0a28ba970f12d0a0e538ae1c6807d105855c) )
	ROM_LOAD( "cpu.8a",			0x6000, 0x2000, CRC(a718c6f2) SHA1(19afa8c353829232cb96c27b87f13b43166ab6fc) )

    ROM_REGION( 0x3800, REGION_CPU2, 0 ) /* TMS9980 code */
	ROM_LOAD( "snd.13c",		0x0000, 0x0800, CRC(21e9350c) SHA1(f30a180309e373a17569351944f5e7982c3b3f9d) )
	ROM_LOAD( "snd.13a",		0x0800, 0x1000, CRC(1de29f25) SHA1(535acb132266d6137b0610ee9a9b946459ae44af) )
	ROM_LOAD( "snd.11a",		0x2800, 0x1000, CRC(61c74c79) SHA1(9f34d18a919446dd76857b851cea23fc1526f3c2) )

	ROM_REGION( 0x1000, REGION_CPU3, 0 ) /* COP420 microcontroller code */
	ROM_LOAD( "cop.bin",		0x0000, 0x1000, CRC(bbfd26d5) SHA1(5f78b32b6e7c003841ef5b635084db2cdfebf0e1) )

	ROM_REGION( 0x1000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "vid.8a",			0x0000, 0x800, CRC(459ccc55) SHA1(747f6789605b48be9e22f779f9e3f6c98ad4e594) )
	ROM_LOAD( "vid.6a",			0x0800, 0x800, CRC(12ebbe74) SHA1(0f87c81a45d1bf3b8c6a70ee5e1a014069f67755) )

	ROM_REGION( 0x0020, REGION_PROMS, 0 ) /* color prom */
	ROM_LOAD( "vid.clr",		0x0000, 0x0020, CRC(6a0c7d87) SHA1(140335d85c67c75b65689d4e76d29863c209cf32) )
ROM_END



/*************************************
 *
 *  Driver config
 *
 *************************************/

DRIVER_INIT( looping )
{
	int length = memory_region_length(REGION_CPU1);
	UINT8 *rom = memory_region(REGION_CPU1);
	int i;

	/* bitswap the TMS9995 ROMs */
	for (i = 0; i < length; i++)
		rom[i] = BITSWAP8(rom[i], 0,1,2,3,4,5,6,7);

	/* install protection handlers */
	memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x7000, 0x7007, 0, 0, protection_r);
}



/*************************************
 *
 *  Game drivers
 *
 *************************************/

GAME( 1982, looping,  0,        looping, looping, looping, ROT90, "Venture Line", "Looping (set 1)", GAME_IMPERFECT_SOUND | GAME_SUPPORTS_SAVE )
GAME( 1982, loopinga, looping,  looping, looping, looping, ROT90, "Venture Line", "Looping (set 2)", GAME_IMPERFECT_SOUND | GAME_SUPPORTS_SAVE )
GAME( 1982, skybump,  0,        looping, skybump, looping, ROT90, "Venture Line", "Sky Bumper", GAME_IMPERFECT_SOUND | GAME_SUPPORTS_SAVE )

