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                                                                                                                                                 
// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
/***************************************************************************

Universal 8106-A2 + 8106-B PCB set

driver by Nicola Salmoria

  Confirmed to use the 8106-A2/8106-B PCB:
    Lady Bug
    Snap Jack
    Cosmic Avenger

  Similar or bootleg PCB:
    Dorodon (by Falcon)
    Space Raider

Memory map (preliminary)

0000-5fff ROM
6000-6fff RAM
d000-d3ff video RAM
          d000-d007/d020-d027/d040-d047/d060-d067 contain the column scroll
          registers (not used by Lady Bug)
d400-d7ff color RAM (4 bits wide)

memory mapped ports:

read:
9000      IN0
9001      IN1
9002      DSW0
9003      DSW1
e000      IN2 (not used by Lady Bug)
8000      interrupt enable? (toggle)?
see the input_ports definition below for details on the input bits

write:
7000-73ff sprites
a000      flip screen
b000      sound port 1
c000      sound port 2

interrupts:
There is no vblank interrupt. The vblank status is read from IN1.
Coin insertion in left slot generates a NMI, in right slot an IRQ.

TODO:
- Coin lockouts are missing. The game only accepts 9 coins, so there has to be
  a lockout call somewhere.

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

/*
 * Space Raider todo list:
 *
 * decode cpu#2 writes to port 0x30 and 0x38 - resistors for sound
 * decode cpu#2 writes to port 0x28-0x2f - ???
 * examine other bits from cpu#2 write to 0xe800
 * one unknown dip
 */

#include "emu.h"
#include "cpu/z80/z80.h"
#include "sound/sn76496.h"
#include "includes/ladybug.h"


static ADDRESS_MAP_START( ladybug_map, AS_PROGRAM, 8, ladybug_state )
	AM_RANGE(0x0000, 0x5fff) AM_ROM
	AM_RANGE(0x6000, 0x6fff) AM_RAM
	AM_RANGE(0x7000, 0x73ff) AM_WRITEONLY AM_SHARE("spriteram")
	AM_RANGE(0x8000, 0x8fff) AM_READNOP
	AM_RANGE(0x9000, 0x9000) AM_READ_PORT("IN0")
	AM_RANGE(0x9001, 0x9001) AM_READ_PORT("IN1")
	AM_RANGE(0x9002, 0x9002) AM_READ_PORT("DSW0")
	AM_RANGE(0x9003, 0x9003) AM_READ_PORT("DSW1")
	AM_RANGE(0xa000, 0xa000) AM_WRITE(ladybug_flipscreen_w)
	AM_RANGE(0xb000, 0xbfff) AM_DEVWRITE("sn1", sn76489_device, write)
	AM_RANGE(0xc000, 0xcfff) AM_DEVWRITE("sn2", sn76489_device, write)
	AM_RANGE(0xd000, 0xd3ff) AM_RAM_WRITE(ladybug_videoram_w) AM_SHARE("videoram")
	AM_RANGE(0xd400, 0xd7ff) AM_RAM_WRITE(ladybug_colorram_w) AM_SHARE("colorram")
	AM_RANGE(0xe000, 0xe000) AM_READ_PORT("IN2")
ADDRESS_MAP_END

static ADDRESS_MAP_START( decrypted_opcodes_map, AS_DECRYPTED_OPCODES, 8, ladybug_state )
	AM_RANGE(0x0000, 0x5fff) AM_ROM AM_SHARE("decrypted_opcodes")
ADDRESS_MAP_END

INPUT_CHANGED_MEMBER(ladybug_state::coin1_inserted)
{
	/* left coin insertion causes an NMI */
	m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? ASSERT_LINE : CLEAR_LINE);
}

INPUT_CHANGED_MEMBER(ladybug_state::coin2_inserted)
{
	/* right coin insertion causes an IRQ */
	if (newval)
		m_maincpu->set_input_line(0, HOLD_LINE);
}


#define LADYBUG_P1_CONTROL_PORT_TAG ("CONTP1")
#define LADYBUG_P2_CONTROL_PORT_TAG ("CONTP2")

CUSTOM_INPUT_MEMBER(ladybug_state::ladybug_p1_control_r)
{
	return m_p1_control->read();
}

CUSTOM_INPUT_MEMBER(ladybug_state::ladybug_p2_control_r)
{
	UINT32 ret;

	/* upright cabinet only uses a single set of controls */
	if (m_port_dsw0->read() & 0x20)
		ret = m_p2_control->read();
	else
		ret = m_p1_control->read();

	return ret;
}


static INPUT_PORTS_START( ladybug )
	PORT_START("IN0")
	PORT_BIT( 0x1f, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, ladybug_state,ladybug_p1_control_r, nullptr)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_TILT )

	PORT_START("IN1")
	PORT_BIT( 0x1f, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, ladybug_state,ladybug_p2_control_r, nullptr)
	/* This should be connected to the 4V clock. I don't think the game uses it. */
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	/* Note that there are TWO VBlank inputs, one is active low, the other active */
	/* high. There are probably other differencies in the hardware, but emulating */
	/* them this way is enough to get the game running. */
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_CUSTOM ) PORT_VBLANK("screen")
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen")

	PORT_START("IN2")
	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("DSW0")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x03, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x04, 0x04, "High Score Names" )
	PORT_DIPSETTING(    0x00, "3 Letters" )
	PORT_DIPSETTING(    0x04, "10 Letters" )
	PORT_DIPNAME( 0x08, 0x08, "Rack Test (Cheat)" ) PORT_CODE(KEYCODE_F1)
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, "Freeze" )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Free_Play ) )
	PORT_DIPSETTING(    0x40, DEF_STR( No ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x80, "3" )
	PORT_DIPSETTING(    0x00, "5" )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x0f, 0x0f, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x0f, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x09, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x0e, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x0d, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x0b, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x05 all give 1 Coin/1 Credit */
	PORT_DIPNAME( 0xf0, 0xf0, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x70, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0xf0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x90, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xd0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0xb0, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x50 all give 1 Coin/1 Credit */

	PORT_START("COIN")  /* FAKE */
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin1_inserted, 0)
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin2_inserted, 0)

	PORT_START(LADYBUG_P1_CONTROL_PORT_TAG)
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START(LADYBUG_P2_CONTROL_PORT_TAG)
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END

static INPUT_PORTS_START( snapjack )
	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_TILT )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
	/* This should be connected to the 4V clock. I don't think the game uses it. */
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	/* Note that there are TWO VBlank inputs, one is active low, the other active */
	/* high. There are probably other differencies in the hardware, but emulating */
	/* them this way is enough to get the game running. */
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_CUSTOM ) PORT_VBLANK("screen")
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen")

	PORT_START("IN2")
	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("DSW0")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x03, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x04, 0x04, "High Score Names" )
	PORT_DIPSETTING(    0x00, "3 Letters" )
	PORT_DIPSETTING(    0x04, "10 Letters" )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x10, 0x00, "unused1?" )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, "unused2?" )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "2" )
	PORT_DIPSETTING(    0xc0, "3" )
	PORT_DIPSETTING(    0x80, "4" )
	PORT_DIPSETTING(    0x40, "5" )

	PORT_START("DSW1")
	/* coinage is slightly different from Lady Bug and Cosmic Avenger */
	PORT_DIPNAME( 0x0f, 0x0f, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x09, DEF_STR( 2C_2C ) )
	PORT_DIPSETTING(    0x0f, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x0e, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x0d, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x0b, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x04 all give 1 Coin/1 Credit */
	PORT_DIPNAME( 0xf0, 0xf0, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x50, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x70, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x90, DEF_STR( 2C_2C ) )
	PORT_DIPSETTING(    0xf0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xd0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0xb0, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x04 all give 1 Coin/1 Credit */

	PORT_START("COIN")  /* FAKE */
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin1_inserted, 0)
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin2_inserted, 0)
INPUT_PORTS_END

static INPUT_PORTS_START( cavenger )
	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_TILT )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	/* This should be connected to the 4V clock. I don't think the game uses it. */
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	/* Note that there are TWO VBlank inputs, one is active low, the other active */
	/* high. There are probably other differencies in the hardware, but emulating */
	/* them this way is enough to get the game running. */
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_CUSTOM ) PORT_VBLANK("screen")
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen")

	PORT_START("IN2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON2 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL
	PORT_BIT( 0xfc, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("DSW0")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x03, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x04, 0x04, "High Score Names" )
	PORT_DIPSETTING(    0x00, "3 Letters" )
	PORT_DIPSETTING(    0x04, "10 Letters" )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x30, 0x00, "Initial High Score" )
	PORT_DIPSETTING(    0x00, "0" )
	PORT_DIPSETTING(    0x30, "5000" )
	PORT_DIPSETTING(    0x20, "8000" )
	PORT_DIPSETTING(    0x10, "10000" )
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "2" )
	PORT_DIPSETTING(    0xc0, "3" )
	PORT_DIPSETTING(    0x80, "4" )
	PORT_DIPSETTING(    0x40, "5" )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x0f, 0x0f, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x0f, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x09, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x0e, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x0d, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x0b, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x05 all give 1 Coin/1 Credit */
	PORT_DIPNAME( 0xf0, 0xf0, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x70, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0xf0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x90, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xd0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0xb0, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x50 all give 1 Coin/1 Credit */

	PORT_START("COIN")  /* FAKE */
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin1_inserted, 0)
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin2_inserted, 0)
INPUT_PORTS_END

static INPUT_PORTS_START( dorodon )
	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_TILT )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
	/* This should be connected to the 4V clock. I don't think the game uses it. */
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	/* Note that there are TWO VBlank inputs, one is active low, the other active */
	/* high. There are probably other differencies in the hardware, but emulating */
	/* them this way is enough to get the game running. */
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_CUSTOM ) PORT_VBLANK("screen")
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen")

	PORT_START("IN2")
	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("DSW0")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x03, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x04, "20000" )
	PORT_DIPSETTING(    0x00, "30000" )
	PORT_DIPNAME( 0x08, 0x08, "Rack Test (Cheat)" ) PORT_CODE(KEYCODE_F1)
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, "Freeze" )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Free_Play ) )
	PORT_DIPSETTING(    0x40, DEF_STR( No ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x80, "3" )
	PORT_DIPSETTING(    0x00, "5" )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x0f, 0x0f, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x0f, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x09, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x0e, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x0d, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x0b, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x05 all give 1 Coin/1 Credit */
	PORT_DIPNAME( 0xf0, 0xf0, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x70, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0xf0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x90, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xd0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0xb0, DEF_STR( 1C_5C ) )
	/* settings 0x00 through 0x50 all give 1 Coin/1 Credit */

	PORT_START("COIN")  /* FAKE */
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin1_inserted, 0)
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_CHANGED_MEMBER(DEVICE_SELF, ladybug_state,coin2_inserted, 0)
INPUT_PORTS_END

static const gfx_layout charlayout =
{
	8,8,    /* 8*8 characters */
	512,    /* 512 characters */
	2,  /* 2 bits per pixel */
	{ 0, 512*8*8 }, /* the two bitplanes are separated */
	{ 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 const gfx_layout spritelayout =
{
	16,16,  /* 16*16 sprites */
	128,    /* 128 sprites */
	2,  /* 2 bits per pixel */
	{ 1, 0 },   /* the two bitplanes are packed in two consecutive bits */
	{ 0, 2, 4, 6, 8, 10, 12, 14,
			8*16+0, 8*16+2, 8*16+4, 8*16+6, 8*16+8, 8*16+10, 8*16+12, 8*16+14 },
	{ 23*16, 22*16, 21*16, 20*16, 19*16, 18*16, 17*16, 16*16,
			7*16, 6*16, 5*16, 4*16, 3*16, 2*16, 1*16, 0*16 },
	64*8    /* every sprite takes 64 consecutive bytes */
};
static const gfx_layout spritelayout2 =
{
	8,8,    /* 8*8 sprites */
	512,    /* 512 sprites */
	2,  /* 2 bits per pixel */
	{ 1, 0 },   /* the two bitplanes are packed in two consecutive bits */
	{ 0, 2, 4, 6, 8, 10, 12, 14 },
	{ 7*16, 6*16, 5*16, 4*16, 3*16, 2*16, 1*16, 0*16 },
	16*8    /* every sprite takes 16 consecutive bytes */
};

static GFXDECODE_START( ladybug )
	GFXDECODE_ENTRY( "gfx1", 0, charlayout,      0,  8 )
	GFXDECODE_ENTRY( "gfx2", 0, spritelayout,  4*8, 16 )
	GFXDECODE_ENTRY( "gfx2", 0, spritelayout2, 4*8, 16 )
GFXDECODE_END

MACHINE_START_MEMBER(ladybug_state,ladybug)
{
}

static MACHINE_CONFIG_START( ladybug, ladybug_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, 4000000)   /* 4 MHz */
	MCFG_CPU_PROGRAM_MAP(ladybug_map)

	MCFG_MACHINE_START_OVERRIDE(ladybug_state,ladybug)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
	MCFG_SCREEN_SIZE(32*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(1*8, 31*8-1, 4*8, 28*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(ladybug_state, screen_update_ladybug)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", ladybug)
	MCFG_PALETTE_ADD("palette", 4*8+4*16)
	MCFG_PALETTE_INDIRECT_ENTRIES(32)
	MCFG_PALETTE_INIT_OWNER(ladybug_state,ladybug)

	MCFG_VIDEO_START_OVERRIDE(ladybug_state,ladybug)

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

	MCFG_SOUND_ADD("sn1", SN76489, 4000000)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)

	MCFG_SOUND_ADD("sn2", SN76489, 4000000)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( dorodon, ladybug )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_DECRYPTED_OPCODES_MAP(decrypted_opcodes_map)
MACHINE_CONFIG_END


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

  Game driver(s)

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

ROM_START( ladybug )
	ROM_REGION( 0x10000, "maincpu", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "l1.c4", 0x0000, 0x1000, CRC(d09e0adb) SHA1(ddc1f849cbcefb64b70a26c2a4c993f0516af814) ) /* PCB silkscreened ROM1 */
	ROM_LOAD( "l2.d4", 0x1000, 0x1000, CRC(88bc4a0a) SHA1(193c9f90b7550020c0923cb158dff7d5faa53bc6) ) /* PCB silkscreened ROM2 */
	ROM_LOAD( "l3.e4", 0x2000, 0x1000, CRC(53e9efce) SHA1(1960e9cd896b6a65197aefc3f10348103552b598) ) /* PCB silkscreened ROM3 */
	ROM_LOAD( "l4.h4", 0x3000, 0x1000, CRC(ffc424d7) SHA1(2a4b9533e61e265bdd38c126add8c26d5bc048d5) ) /* PCB silkscreened ROM4 */
	ROM_LOAD( "l5.j4", 0x4000, 0x1000, CRC(ad6af809) SHA1(276275d56c725b9d90eeb44c317ceb06bac27ae7) ) /* PCB silkscreened ROM5 */
	ROM_LOAD( "l6.k4", 0x5000, 0x1000, CRC(cf1acca4) SHA1(c05de7de4bd05d5c2af6aa752e057a9286f3effc) ) /* PCB silkscreened ROM6 */

	ROM_REGION( 0x2000, "gfx1", 0 ) /* Located on the UNIVERSAL 8106-B video PCB */
	ROM_LOAD( "l9.f7", 0x0000, 0x1000, CRC(77b1da1e) SHA1(58cb82417396a3d96acfc864f091b1a5988f228d) )
	ROM_LOAD( "l0.h7", 0x1000, 0x1000, CRC(aa82e00b) SHA1(83a5b745e58844b6dd7d05dfe9dbb5959aaf5c40) )

	ROM_REGION( 0x2000, "gfx2", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "l8.l7", 0x0000, 0x1000, CRC(8b99910b) SHA1(0bc812cf872f04eacedb50feed53f1aa8a1f24b9) )
	ROM_LOAD( "l7.m7", 0x1000, 0x1000, CRC(86a5b448) SHA1(f8585a6fcf921e3e21f112dd2de474cb53cef290) )

	ROM_REGION( 0x0060, "proms", 0 ) /* BPROMs are 82s123 & located on the UNIVERSAL 8106-B video PCB */
	ROM_LOAD( "10-2.k1", 0x0000, 0x0020, CRC(df091e52) SHA1(4d7fea6d9ab31e5f280b1dc198a325f00c3826ef) ) /* palette */
	ROM_LOAD( "10-1.f4", 0x0020, 0x0020, CRC(40640d8f) SHA1(85d13a9b78c47174cff7c869f52b30263bae575e) ) /* sprite color lookup table */
	ROM_LOAD( "10-3.c4", 0x0040, 0x0020, CRC(27fa3a50) SHA1(7cf59b7a37c156640d6ea91554d1c4276c1780e0) ) /* ?? */
ROM_END

ROM_START( ladybugb )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "lb1a.cpu", 0x0000, 0x1000, CRC(ec135e54) SHA1(69fc6db04b28c25eda329fc88c235267ca93a09f) )
	ROM_LOAD( "lb2a.cpu", 0x1000, 0x1000, CRC(3049c5c6) SHA1(51ceb70fa4789ff91c9bb1e157be5b6c09ff3c8e) )
	ROM_LOAD( "lb3a.cpu", 0x2000, 0x1000, CRC(b0fef837) SHA1(37e9d8d157c3af12cd97534a42dd21f621ac501b) )
	ROM_LOAD( "l4.h4",    0x3000, 0x1000, CRC(ffc424d7) SHA1(2a4b9533e61e265bdd38c126add8c26d5bc048d5) )
	ROM_LOAD( "l5.j4",    0x4000, 0x1000, CRC(ad6af809) SHA1(276275d56c725b9d90eeb44c317ceb06bac27ae7) )
	ROM_LOAD( "lb6a.cpu", 0x5000, 0x1000, CRC(88c8002a) SHA1(ffff1b8d4c1521710c988eee12081d28ed491ccf) )

	ROM_REGION( 0x2000, "gfx1", 0 )
	ROM_LOAD( "l9.f7", 0x0000, 0x1000, CRC(77b1da1e) SHA1(58cb82417396a3d96acfc864f091b1a5988f228d) )
	ROM_LOAD( "l0.h7", 0x1000, 0x1000, CRC(aa82e00b) SHA1(83a5b745e58844b6dd7d05dfe9dbb5959aaf5c40) )

	ROM_REGION( 0x2000, "gfx2", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "l8.l7", 0x0000, 0x1000, CRC(8b99910b) SHA1(0bc812cf872f04eacedb50feed53f1aa8a1f24b9) )
	ROM_LOAD( "l7.m7", 0x1000, 0x1000, CRC(86a5b448) SHA1(f8585a6fcf921e3e21f112dd2de474cb53cef290) )

	ROM_REGION( 0x0060, "proms", 0 ) /* BPROMs are 82s123 or compatible */
	ROM_LOAD( "10-2.k1", 0x0000, 0x0020, CRC(df091e52) SHA1(4d7fea6d9ab31e5f280b1dc198a325f00c3826ef) ) /* palette */
	ROM_LOAD( "10-1.f4", 0x0020, 0x0020, CRC(40640d8f) SHA1(85d13a9b78c47174cff7c869f52b30263bae575e) ) /* sprite color lookup table */
	ROM_LOAD( "10-3.c4", 0x0040, 0x0020, CRC(27fa3a50) SHA1(7cf59b7a37c156640d6ea91554d1c4276c1780e0) ) /* ?? */
ROM_END

ROM_START( ladybgb2 )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "lb1b.cpu", 0x0000, 0x1000, CRC(35d61e65) SHA1(43b797f1882e0acbf6685deea82de77e78d2c917) )
	ROM_LOAD( "lb2b.cpu", 0x1000, 0x1000, CRC(a13e0fe4) SHA1(9e2876d8390d2b072d064b197057089a25c13a4a) )
	ROM_LOAD( "lb3b.cpu", 0x2000, 0x1000, CRC(ee8ac716) SHA1(ead222d2cd022ea3a4559e3cff08cabf2486eb68) )
	ROM_LOAD( "l4.h4",    0x3000, 0x1000, CRC(ffc424d7) SHA1(2a4b9533e61e265bdd38c126add8c26d5bc048d5) )
	ROM_LOAD( "l5.j4",    0x4000, 0x1000, CRC(ad6af809) SHA1(276275d56c725b9d90eeb44c317ceb06bac27ae7) )
	ROM_LOAD( "lb6b.cpu", 0x5000, 0x1000, CRC(dc906e89) SHA1(ffa5c3fc9d438e85cbe4fb33343dec664406fda7) )

	ROM_REGION( 0x2000, "gfx1", 0 )
	ROM_LOAD( "l9.f7", 0x0000, 0x1000, CRC(77b1da1e) SHA1(58cb82417396a3d96acfc864f091b1a5988f228d) )
	ROM_LOAD( "l0.h7", 0x1000, 0x1000, CRC(aa82e00b) SHA1(83a5b745e58844b6dd7d05dfe9dbb5959aaf5c40) )

	ROM_REGION( 0x2000, "gfx2", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "l8.l7", 0x0000, 0x1000, CRC(8b99910b) SHA1(0bc812cf872f04eacedb50feed53f1aa8a1f24b9) )
	ROM_LOAD( "l7.m7", 0x1000, 0x1000, CRC(86a5b448) SHA1(f8585a6fcf921e3e21f112dd2de474cb53cef290) )

	ROM_REGION( 0x0060, "proms", 0 ) /* BPROMs are 82s123 or compatible */
	ROM_LOAD( "10-2.k1", 0x0000, 0x0020, CRC(df091e52) SHA1(4d7fea6d9ab31e5f280b1dc198a325f00c3826ef) ) /* palette */
	ROM_LOAD( "10-1.f4", 0x0020, 0x0020, CRC(40640d8f) SHA1(85d13a9b78c47174cff7c869f52b30263bae575e) ) /* sprite color lookup table */
	ROM_LOAD( "10-3.c4", 0x0040, 0x0020, CRC(27fa3a50) SHA1(7cf59b7a37c156640d6ea91554d1c4276c1780e0) ) /* ?? */
ROM_END

ROM_START( snapjack )
	ROM_REGION( 0x10000, "maincpu", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "sj1.c4", 0x0000, 0x1000, CRC(6b30fcda) SHA1(85e4ebbbe8e8d6c79a14387d7a6818abc9430037) ) /* PCB silkscreened ROM1 */
	ROM_LOAD( "sj2.d4", 0x1000, 0x1000, CRC(1f1088d1) SHA1(0fd5204ea27e9bdd811e9ea21e9bbab84b916f4a) ) /* PCB silkscreened ROM2 */
	ROM_LOAD( "sj3.e4", 0x2000, 0x1000, CRC(edd65f3a) SHA1(763d588f0755a22c0f24269e6f38979fd516693f) ) /* PCB silkscreened ROM3 */
	ROM_LOAD( "sj4.h4", 0x3000, 0x1000, CRC(f4481192) SHA1(514bb124a1d75a622e2ca4c2175d819092d4638d) ) /* PCB silkscreened ROM4 */
	ROM_LOAD( "sj5.j4", 0x4000, 0x1000, CRC(1bff7d05) SHA1(47246095313ebba30f42d715a9fb5fc1abb68ea6) ) /* PCB silkscreened ROM5 */
	ROM_LOAD( "sj6.k4", 0x5000, 0x1000, CRC(21793edf) SHA1(11e259161bab3a32a8b52f7baa4fec17be6d4302) ) /* PCB silkscreened ROM6 */

	ROM_REGION( 0x2000, "gfx1", 0 ) /* Located on the UNIVERSAL 8106-B video PCB */
	ROM_LOAD( "sj9.f7", 0x0000, 0x1000, CRC(ff2011c7) SHA1(38409e2318dee3cc0678d4ee9e93d9b895883df6) )
	ROM_LOAD( "sj0.h7", 0x1000, 0x1000, CRC(f097babb) SHA1(461662719bc7f1cf21c41759f4832a92b0fdb4f2) )

	ROM_REGION( 0x2000, "gfx2", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "sj8.l7", 0x0000, 0x1000, CRC(b7f105b6) SHA1(1135c3188b41cb0ccb24079c613188209b624683) )
	ROM_LOAD( "sj7.m7", 0x1000, 0x1000, CRC(1cdb03a8) SHA1(5f390a672f3adf6392f8060bf7f0bcabc2eba139) )

	ROM_REGION( 0x0060, "proms", 0 ) /* BPROMs are 82s123 & located on the UNIVERSAL 8106-B video PCB */
	ROM_LOAD( "10-2.k1", 0x0000, 0x0020, CRC(cbbd9dd1) SHA1(e267726ba59e9a42ac89dd22eb1508ad21fd32ac) ) /* palette */
	ROM_LOAD( "10-1.f4", 0x0020, 0x0020, CRC(5b16fbd2) SHA1(0a776aeca3947a6f29d527018f5182e758b50c5d) ) /* sprite color lookup table */
	ROM_LOAD( "10-3.c4", 0x0040, 0x0020, CRC(27fa3a50) SHA1(7cf59b7a37c156640d6ea91554d1c4276c1780e0) ) /* ?? */
ROM_END

ROM_START( cavenger )
	ROM_REGION( 0x10000, "maincpu", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "1.c4", 0x0000, 0x1000, CRC(9e0cc781) SHA1(f23bd6b9f427c26ac996a5c8ba29f356cf45c78a) ) /* PCB silkscreened ROM1 */
	ROM_LOAD( "2.d4", 0x1000, 0x1000, CRC(5ce5b950) SHA1(170e3f8be592dcccb8868474f40f8f2223e8a8b5) ) /* PCB silkscreened ROM2 */
	ROM_LOAD( "3.e4", 0x2000, 0x1000, CRC(bc28218d) SHA1(4b0f1b38a5837b7ffc9aec6c28c6eb72cfa46226) ) /* PCB silkscreened ROM3 */
	ROM_LOAD( "4.h4", 0x3000, 0x1000, CRC(2b32e9f5) SHA1(f8a7ea799d8ff9b4f830d064bb2f34a76729c336) ) /* PCB silkscreened ROM4 */
	ROM_LOAD( "5.j4", 0x4000, 0x1000, CRC(d117153e) SHA1(622c90a6c3f0adc24fe8a1d4969075cbd55add4e) ) /* PCB silkscreened ROM5 */
	ROM_LOAD( "6.k4", 0x5000, 0x1000, CRC(c7d366cb) SHA1(ec4981fe34abf992acbd6325b2c756c58ff80b04) ) /* PCB silkscreened ROM6 */

	ROM_REGION( 0x2000, "gfx1", 0 ) /* Located on the UNIVERSAL 8106-B video PCB */
	ROM_LOAD( "9.f7", 0x0000, 0x1000, CRC(63357785) SHA1(20eaa866b7700535312fd415edaea94408ff3e3d) )
	ROM_LOAD( "0.h7", 0x1000, 0x1000, CRC(52ad1133) SHA1(bc8c52c6ba919287773ff6a4ec793ebd95176130) )

	ROM_REGION( 0x2000, "gfx2", 0 ) /* Located on the UNIVERSAL 8106-A2 CPU PCB */
	ROM_LOAD( "8.l7", 0x0000, 0x1000, CRC(b022bf2d) SHA1(85f78d5a1e5782587bb66ad101a94fd0d62fb790) )
	/* 1000-1fff empty */

	ROM_REGION( 0x0060, "proms", 0 ) /* BPROMs are 82s123 & located on the UNIVERSAL 8106-B video PCB */
	ROM_LOAD( "10-2.k1", 0x0000, 0x0020, CRC(42a24dd5) SHA1(03175ee7f8e11896a89d7cc0d614a78a49923627) ) /* palette */
	ROM_LOAD( "10-1.f4", 0x0020, 0x0020, CRC(d736b8de) SHA1(4c9c76826f3a2a631d01fd2531d55318172b0c12) ) /* sprite color lookup table */
	ROM_LOAD( "10-3.c4", 0x0040, 0x0020, CRC(27fa3a50) SHA1(7cf59b7a37c156640d6ea91554d1c4276c1780e0) ) /* ?? */
ROM_END

ROM_START( dorodon )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "dorodon.0",   0x0000, 0x2000, CRC(460aaf26) SHA1(c4ea41cba4ac2d93fedec3c117a4470fee2a910f) )
	ROM_LOAD( "dorodon.1",   0x2000, 0x2000, CRC(d2451eb6) SHA1(4154bfe50b7f75444d3f0c9be6bd2475fdba1938) )
	ROM_LOAD( "dorodon.2",   0x4000, 0x2000, CRC(d3c6ee6c) SHA1(6971ecdc968810c19f8601efc3d389450156bb22) )

	ROM_REGION( 0x2000, "gfx1", 0 )
	ROM_LOAD( "dorodon.5",   0x0000, 0x1000, CRC(5eee2b85) SHA1(55ac9566e805d103b6916f51c764e2601cc1f715) )
	ROM_LOAD( "dorodon.6",   0x1000, 0x1000, CRC(395ac25a) SHA1(d8a55e42b8c5d957c2e6a3181d7ac10c6a448f46) )

	ROM_REGION( 0x2000, "gfx2", 0 )
	ROM_LOAD( "dorodon.4",   0x0000, 0x1000, CRC(d70bb50a) SHA1(b9d46862f288c49bb8b660da87b63bd4ecb36379) )
	ROM_LOAD( "dorodon.3",   0x1000, 0x1000, CRC(e44e59e6) SHA1(ff730152804d75ddb9fb19e8ec33cc764d8a50e8) )

	ROM_REGION( 0x0100, "user1", 0 )
	ROM_LOAD_NIB_HIGH( "dorodon.bp4", 0x0000, 0x0100, CRC(f865c135) SHA1(1202f83bfa50afa5a5d24401efa8bf058e7e30b5) )
	ROM_LOAD_NIB_LOW(  "dorodon.bp3", 0x0000, 0x0100, CRC(47b2f0bb) SHA1(640720aa5c1119080c6da928f6d1b0e76b989742) )

	ROM_REGION( 0x0060, "proms", 0 )
	ROM_LOAD( "dorodon.bp0", 0x0000, 0x0020, CRC(8fcf0bc8) SHA1(392d22731b3e4bc663d6e4385f6069ee2b4ee029) ) /* palette */
	ROM_LOAD( "dorodon.bp1", 0x0020, 0x0020, CRC(3f209be4) SHA1(f924494eed357a15ffc11331c163af24585d4ab9) ) /* sprite color lookup table */
	ROM_LOAD( "dorodon.bp2", 0x0040, 0x0020, CRC(27fa3a50) SHA1(7cf59b7a37c156640d6ea91554d1c4276c1780e0) ) /* timing?? */
ROM_END

ROM_START( dorodon2 )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "1.3fg",        0x0000, 0x2000, CRC(4d05d6f8) SHA1(db12ad04295f0ce112b6e90fde94a53ed1d6c3b9) )
	ROM_LOAD( "2.3h",         0x2000, 0x2000, CRC(27b43b09) SHA1(12a8a6b8665bb9d1967ec631a794aab564a50570) )
	ROM_LOAD( "3.3k",         0x4000, 0x2000, CRC(38d2f295) SHA1(b4d2cfd6e9f03c3ef18dcf67326f4106749b62b1) )

	ROM_REGION( 0x2000, "gfx1", 0 )
	ROM_LOAD( "6.6a",        0x0000, 0x1000, CRC(2a2d8b9c) SHA1(ba3ce8ed6cafa711bf4c6ed260dd15b38adbd6cc) )
	ROM_LOAD( "7.6bc",       0x1000, 0x1000, CRC(d14f95fa) SHA1(e9ba87602d779d833b8152c077c692e67ef696cc) )

	ROM_REGION( 0x2000, "gfx2", 0 )
	ROM_LOAD( "5.3t",        0x0000, 0x1000, CRC(54c04f58) SHA1(342ef914e6f8bf37472d146bb5e9fb67056d7fc5) )
	ROM_LOAD( "4.3r",        0x1000, 0x1000, CRC(1ebb6493) SHA1(30367d7594118e0fa8620e5d20c66a650ca82c86) )

	ROM_REGION( 0x0100, "user1", 0 )
	ROM_LOAD_NIB_HIGH( "dorodon.bp4", 0x0000, 0x0100, CRC(f865c135) SHA1(1202f83bfa50afa5a5d24401efa8bf058e7e30b5) )
	ROM_LOAD_NIB_LOW(  "dorodon.bp3", 0x0000, 0x0100, CRC(47b2f0bb) SHA1(640720aa5c1119080c6da928f6d1b0e76b989742) )

	/* (from other romset - I think these are correct, they match the Starcade video) */
	ROM_REGION( 0x0060, "proms", 0 )
	ROM_LOAD( "dorodon.bp0", 0x0000, 0x0020, CRC(8fcf0bc8) SHA1(392d22731b3e4bc663d6e4385f6069ee2b4ee029) ) /* palette */
	ROM_LOAD( "dorodon.bp1", 0x0020, 0x0020, CRC(3f209be4) SHA1(f924494eed357a15ffc11331c163af24585d4ab9) ) /* sprite color lookup table */
	ROM_LOAD( "dorodon.bp2", 0x0040, 0x0020, CRC(27fa3a50) SHA1(7cf59b7a37c156640d6ea91554d1c4276c1780e0) ) /* timing?? */
ROM_END

DRIVER_INIT_MEMBER(ladybug_state,dorodon)
{
	/* decode the opcodes */

	offs_t i;
	UINT8 *rom = memregion("maincpu")->base();
	UINT8 *table = memregion("user1")->base();

	for (i = 0; i < 0x6000; i++)
		m_decrypted_opcodes[i] = table[rom[i]];
}


GAME( 1981, cavenger, 0,       ladybug, cavenger, driver_device, 0,       ROT0,   "Universal", "Cosmic Avenger", MACHINE_SUPPORTS_SAVE )
GAME( 1981, ladybug,  0,       ladybug, ladybug, driver_device,  0,       ROT270, "Universal", "Lady Bug", MACHINE_SUPPORTS_SAVE )
GAME( 1981, ladybugb, ladybug, ladybug, ladybug, driver_device,  0,       ROT270, "bootleg",   "Lady Bug (bootleg set 1)", MACHINE_SUPPORTS_SAVE )
GAME( 1981, ladybgb2, ladybug, ladybug, ladybug, driver_device,  0,       ROT270, "bootleg",   "Lady Bug (bootleg set 2)", MACHINE_SUPPORTS_SAVE )
GAME( 1982, dorodon,  0,       dorodon, dorodon, ladybug_state,  dorodon, ROT270, "UPL (Falcon license?)", "Dorodon (set 1)", MACHINE_SUPPORTS_SAVE ) // license or bootleg?
GAME( 1982, dorodon2, dorodon, dorodon, dorodon, ladybug_state,  dorodon, ROT270, "UPL (Falcon license?)", "Dorodon (set 2)", MACHINE_SUPPORTS_SAVE ) // "
GAME( 1982, snapjack, 0,       ladybug, snapjack, driver_device, 0,       ROT0,   "Universal", "Snap Jack", MACHINE_SUPPORTS_SAVE )