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

Zodiack/Dogfight (c) 1983 Orca

driver by Zsolt Vasvari

Notes:
- Moguchan and The Percussor triggers this code:
  2DD6: D1            pop  de
  2DD7: D1            pop  de
  2DD8: D1            pop  de
  2DD9: D1            pop  de
  2DDA: D1            pop  de
  2DDB: D1            pop  de
  2DDC: 32 00 70      ld   ($7000),a
  2DDF: 0B            dec  bc
  2DE0: 78            ld   a,b
  2DE1: B1            or   c
  2DE2: 20 F2         jr   nz,$2DD6
  2DE4: E9            jp   (hl)
  All it does is scanning the whole 64k z80 space via all those pop opcodes ...
  DE register values are always discarded ... bug in coding or ROM patch?

TODO:
- improve video emulation (especially moguchan colors)
- where do the sound related irqs come from exactly?
- can eventually be merged with espial.c

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

Zodiack
Orca, 1983

PCB Layouts
-----------

Top PCB                             Middle PCB

 |---------------------|             |---------------------|
 |     HM4334     DIP24|             |             OVG30C.6|
|-|    HM4334          |            |-|              DIP24 |
| |            OVG20C.1|            | |    6116      DIP24 |
| |                    |            | |              DIP24 |
| |               Z80  |            | |            OVG30C.3|
| |                    |            | |            OVG30C.2|
|-|                    |            |-|                    |
 |             AY3-8910|             |                     |
 |                     |             |                     |
 |2                    |             |                     |
 |2           DSW1 DSW2|             |                     |
 |W                    |             |            Z80      |
 |A  555 LM324         |             |                     |
 |Y  M51516   VOL      |             |            18.432MHz|
 |---------------------|             |---------------------|
Notes:                              Notes:
      Z80      - clock 18.432/6           Z80   - clock 18.432/6
      AY3-8910 - clock 18.432/12          6116  - 2k x8 SRAM
      HM4334   - 1k x4 SRAM               DIP24 - Empty socket
      DIP24    - Empty socket             ROM 2/3 - 2764
      ROM 1    - 2716                     ROM 6   - 2732
      VSync    - 60.5900Hz
      HSync    - 15.5143kHz


Bottom PCB

 |------------------------------------------|
 |    2114          OVG40C.7                |
|-|   2114                         OVG40C.9 |
| |                   2114                  |
| |                   2114         OVG40C.8 |
| |                                         |
| |        2114                             |
|-|        2114                             |
 |                                          |
 |                                          |
 |                           93422          |
 |         OVG40C.2B                        |
 |         OVG40C.2A                        |
 |------------------------------------------|
Notes:
      2114  - 1k x4 SRAM
      93422 - 256 x4 SRAM
      ALL ROMs 2732
      ALL PROMs MMI 6331

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "sound/ay8910.h"
#include "includes/zodiack.h"

#define PIXEL_CLOCK         (XTAL_18_432MHz/3)

#define HTOTAL              (396)
#define HBEND               (0)
#define HBSTART             (256)

#define VTOTAL              (256)
#define VBEND               (16)
#define VBSTART             (240)


WRITE8_MEMBER( zodiack_state::nmi_mask_w )
{
	m_main_nmi_enabled = (data & 1) ^ 1;
}

WRITE8_MEMBER( zodiack_state::sound_nmi_enable_w )
{
	m_sound_nmi_enabled = data & 1;
}

INTERRUPT_GEN_MEMBER(zodiack_state::zodiack_main_nmi_gen)
{
	if (m_main_nmi_enabled)
		nmi_line_pulse(device);
}

INTERRUPT_GEN_MEMBER(zodiack_state::zodiack_sound_nmi_gen)
{
	if (m_sound_nmi_enabled)
		nmi_line_pulse(device);
}


WRITE8_MEMBER( zodiack_state::master_soundlatch_w )
{
	soundlatch_byte_w(space, offset, data);
	m_audiocpu->set_input_line(0, HOLD_LINE);
}

WRITE8_MEMBER( zodiack_state::control_w )
{
	/* Bit 0-1 - coin counters */
	coin_counter_w(machine(), 0, data & 0x02);
	coin_counter_w(machine(), 1, data & 0x01);
	/* Bit 2 - ???? */
}


static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8, zodiack_state )
	AM_RANGE(0x0000, 0x4fff) AM_ROM
	AM_RANGE(0x5800, 0x5fff) AM_RAM
	AM_RANGE(0x6081, 0x6081) AM_READ_PORT("DSW0") AM_WRITE(control_w)
	AM_RANGE(0x6082, 0x6082) AM_READ_PORT("DSW1")
	AM_RANGE(0x6083, 0x6083) AM_READ_PORT("IN0")
	AM_RANGE(0x6084, 0x6084) AM_READ_PORT("IN1")
	AM_RANGE(0x6090, 0x6090) AM_READWRITE(soundlatch_byte_r, master_soundlatch_w)
	AM_RANGE(0x7000, 0x7000) AM_READNOP AM_WRITE(watchdog_reset_w)  /* NOP??? */
	AM_RANGE(0x7100, 0x7100) AM_WRITE(nmi_mask_w)
	AM_RANGE(0x7200, 0x7200) AM_WRITE(flipscreen_w)
	AM_RANGE(0x9000, 0x903f) AM_RAM_WRITE(attributes_w) AM_SHARE("attributeram")
	AM_RANGE(0x9040, 0x905f) AM_RAM AM_SHARE("spriteram")
	AM_RANGE(0x9060, 0x907f) AM_RAM AM_SHARE("bulletsram")
	AM_RANGE(0x9080, 0x93ff) AM_RAM
	AM_RANGE(0xa000, 0xa3ff) AM_RAM_WRITE(videoram_w) AM_SHARE("videoram")
	AM_RANGE(0xb000, 0xb3ff) AM_RAM_WRITE(videoram2_w) AM_SHARE("videoram_2")
	AM_RANGE(0xc000, 0xcfff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_map, AS_PROGRAM, 8, zodiack_state )
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x2000, 0x23ff) AM_RAM
	AM_RANGE(0x4000, 0x4000) AM_WRITE(sound_nmi_enable_w)
	AM_RANGE(0x6000, 0x6000) AM_READWRITE(soundlatch_byte_r, soundlatch_byte_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START( io_map, AS_IO, 8, zodiack_state  )
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x00, 0x01) AM_DEVWRITE("aysnd", ay8910_device, address_data_w)
ADDRESS_MAP_END



static INPUT_PORTS_START( zodiack )
	PORT_START("DSW0")      /* never read in this game */
	PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_UNUSED )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x03, 0x00, DEF_STR( Lives ) )        PORT_DIPLOCATION("SW1:1,2")
	PORT_DIPSETTING(    0x00, "3" )
	PORT_DIPSETTING(    0x01, "4" )
	PORT_DIPSETTING(    0x02, "5" )
	PORT_DIPSETTING(    0x03, "6" )
	PORT_DIPNAME( 0x1c, 0x00, DEF_STR( Coinage ) )      PORT_DIPLOCATION("SW1:3,4,5")
	PORT_DIPSETTING(    0x14, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x18, "2 Coins/1 Credit  3 Coins/2 Credits" )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x1c, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Bonus_Life ) )   PORT_DIPLOCATION("SW1:6")
	PORT_DIPSETTING(    0x00, "20000 50000" )
	PORT_DIPSETTING(    0x20, "40000 70000" )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Cabinet ) )      PORT_DIPLOCATION("SW1:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )      PORT_DIPLOCATION("SW1:8") /* Manual shows this one as Service Mode */
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON1 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY
INPUT_PORTS_END

static INPUT_PORTS_START( dogfight )
	PORT_START("DSW0")
	PORT_DIPNAME( 0x07, 0x00, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0x38, 0x00, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x38, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x28, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 3C_4C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_3C ) )
	PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) )  /* most likely unused */
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )  /* most likely unused */
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("DSW1")
	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( 0x04, 0x00, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x00, "Invulnerability (Cheat)")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x00, "20000 50000" )
	PORT_DIPSETTING(    0x20, "40000 70000" )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x80, 0x00, "Freeze" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN2 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_COIN3 )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON1 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY
INPUT_PORTS_END

static INPUT_PORTS_START( moguchan )
	PORT_START("DSW0")
	PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START("DSW1")
	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( 0x1c, 0x00, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x14, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x18, "2 Coins/1 Credit  3 Coins/2 Credits" )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x1c, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x00, "20000 50000" )
	PORT_DIPSETTING(    0x20, "40000 70000" )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_COCKTAIL      /* these are read, but are they */
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON1 )                   /* ever used? */
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY
INPUT_PORTS_END

static INPUT_PORTS_START( percuss )
	PORT_START("DSW0")
	PORT_DIPNAME( 0x01, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
	PORT_DIPNAME( 0x0c, 0x00, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x00, "20000 100000" )
	PORT_DIPSETTING(    0x04, "20000 200000" )
	PORT_DIPSETTING(    0x08, "40000 100000" )
	PORT_DIPSETTING(    0x0c, "40000 200000" )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON2 )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x03, 0x00, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "4" )
	PORT_DIPSETTING(    0x01, "5" )
	PORT_DIPSETTING(    0x02, "6" )
	PORT_DIPSETTING(    0x03, "7" )
	PORT_DIPNAME( 0x0c, 0x00, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_COCKTAIL

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON1 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY
INPUT_PORTS_END

static INPUT_PORTS_START( bounty )
	PORT_START("DSW0")
	PORT_DIPNAME( 0x01, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON2 )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("DSW1")
	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, 0x00, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_COCKTAIL

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON1 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY
INPUT_PORTS_END



static const gfx_layout charlayout =
{
	8,8,    /* 8*8 chars */
	256,    /* 256 characters */
	1,      /* 1 bit per pixel */
	{ 0 } , /* single bitplane */
	{ 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 char takes 8 consecutive bytes */
};

static const gfx_layout charlayout_2 =
{
	8,8,    /* 8*8 chars */
	256,    /* 256 characters */
	2,      /* 2 bits per pixel */
	{ 0, 512*8*8 },  /* The bitplanes are separate */
	{ 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 char takes 8 consecutive bytes */
};

static const gfx_layout spritelayout =
{
	16,16,  /* 16*16 sprites */
	64,     /* 64 sprites */
	2,      /* 2 bits per pixel */
	{ 0, 128*32*8 },        /* the two bitplanes are separated */
	{     0,     1,     2,     3,     4,     5,     6,     7,
		8*8+0, 8*8+1, 8*8+2, 8*8+3, 8*8+4, 8*8+5, 8*8+6, 8*8+7 },
	{  0*8,  1*8,  2*8,  3*8,  4*8,  5*8,  6*8,  7*8,
		16*8, 17*8, 18*8, 19*8, 20*8, 21*8, 22*8, 23*8 },
	32*8    /* every sprite takes 32 consecutive bytes */
};

static const gfx_layout bulletlayout =
{
	/* there is no gfx ROM for this one, it is generated by the hardware */
	7,1,    /* it's just 1 pixel, but we use 7*1 to position it correctly */
	1,  /* just one */
	1,  /* 1 bit per pixel */
	{ 10*8*8 }, /* point to letter "A" */
	{ 3, 7, 7, 7, 7, 7, 7 },    /* I "know" that this bit of the */
	{ 1*8 },                        /* graphics ROMs is 1 */
	0   /* no use */
};

static GFXDECODE_START( zodiack )
	GFXDECODE_ENTRY( "gfx1", 0x0000, charlayout,   8*4    , 8 )
	GFXDECODE_ENTRY( "gfx1", 0x0800, spritelayout, 0      , 8 )
	GFXDECODE_ENTRY( "gfx1", 0x0000, bulletlayout, 8*4+8*2, 1 )
	GFXDECODE_ENTRY( "gfx1", 0x1000, charlayout_2, 0      , 8 )
GFXDECODE_END


void zodiack_state::machine_start()
{
	save_item(NAME(m_sound_nmi_enabled));
	save_item(NAME(m_main_nmi_enabled));
}

void zodiack_state::machine_reset()
{
	m_sound_nmi_enabled = 0;
	m_main_nmi_enabled = 0;
}


static MACHINE_CONFIG_START( zodiack, zodiack_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, XTAL_18_432MHz/6)
	MCFG_CPU_PROGRAM_MAP(main_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", zodiack_state, zodiack_main_nmi_gen)
	MCFG_CPU_PERIODIC_INT_DRIVER(zodiack_state, irq0_line_hold, 1*60) // sound related - unknown source, timing is guessed

	MCFG_CPU_ADD("audiocpu", Z80, XTAL_18_432MHz/6)
	MCFG_CPU_PROGRAM_MAP(sound_map)
	MCFG_CPU_IO_MAP(io_map)
	MCFG_CPU_PERIODIC_INT_DRIVER(zodiack_state, zodiack_sound_nmi_gen, 8*60) // sound tempo - unknown source, timing is guessed

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL, VBEND, VBSTART)
	MCFG_SCREEN_UPDATE_DRIVER(zodiack_state, screen_update)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", zodiack)
	MCFG_PALETTE_ADD("palette", 4*8+2*8+2*1)
	MCFG_PALETTE_INDIRECT_ENTRIES(48+1)
	MCFG_PALETTE_INIT_OWNER(zodiack_state,zodiack)

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

	MCFG_SOUND_ADD("aysnd", AY8910, XTAL_18_432MHz/12)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
MACHINE_CONFIG_END


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

  Game driver(s)

***************************************************************************/
ROM_START( zodiack )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "ovg30c.2",     0x0000, 0x2000, CRC(a2125e99) SHA1(00ae4ed2c7b6895d2dc58aa2fc51c25b6428e4ba) )
	ROM_LOAD( "ovg30c.3",     0x2000, 0x2000, CRC(aee2b77f) SHA1(2581b7a75d38663cc5ebc91a77385ca7eb9b4aba) )
	ROM_LOAD( "ovg30c.6",     0x4000, 0x0800, CRC(1debb278) SHA1(98c9f09c5f3125ba8a1392be62fd469aa0ba4d98) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "ovg20c.1",     0x0000, 0x1000, CRC(2d3c3baf) SHA1(e32937b947e591cba45da2dd456e4f655e62ddfd) )

	ROM_REGION( 0x2800, "gfx1", 0 )
	ROM_LOAD( "ovg40c.7",     0x0000, 0x0800, CRC(ed9d3be7) SHA1(80d5906afef8b6d68fb13d41992aea208d9e3690) )
	ROM_LOAD( "orca40c.8",    0x0800, 0x1000, CRC(88269c94) SHA1(acc27be0d27b33c2242ecf0563fe986e8dffb264) )
	ROM_LOAD( "orca40c.9",    0x1800, 0x1000, CRC(a3bd40c9) SHA1(dcf8cbb73c081a3af85da135e8278c54e9e0de7c) )

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "ovg40c.2a",    0x0000, 0x0020, CRC(703821b8) SHA1(33dcc9b0bea5e110eb4ffd3b8b8763e32e927b22) )
	ROM_LOAD( "ovg40c.2b",    0x0020, 0x0020, CRC(21f77ec7) SHA1(b1019afc4361aca98b7120b21743bfeb5ea2ff63) )
ROM_END

ROM_START( dogfight )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "df-2.4f",      0x0000, 0x2000, CRC(ad24b28b) SHA1(5bfc24c9d176a987525c5ad3eff3308f679d4d44) )
	ROM_LOAD( "df-3.4h",      0x2000, 0x2000, CRC(cd172707) SHA1(9d7a494006db13cbe9c895875a18d9423a0128bc) )
	ROM_LOAD( "df-5.4n",      0x4000, 0x1000, CRC(874dc6bf) SHA1(2c34fdfb2838c41f239171bc9a14a5cc7a94a170) )
	ROM_LOAD( "df-4.4m",      0xc000, 0x1000, CRC(d8aa3d6d) SHA1(0863d566ff4a181ae8a8d552f9768dd028254605) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "df-1.4n",      0x0000, 0x1000, CRC(dcbb1c5b) SHA1(51fa51ff64982455b00484d55f6a8cf89fc786f1) )

	ROM_REGION( 0x2800, "gfx1", 0 )
	ROM_LOAD( "df-6.3s",      0x0000, 0x0800, CRC(3059b515) SHA1(849e99a04ddcdfcf097cc3ac17e9edf12b51cd69) )
	ROM_LOAD( "df-7.7n",      0x0800, 0x1000, CRC(ffe05fee) SHA1(70b9d0808defd936e2c3567f8e6996a19753de81) )
	ROM_LOAD( "df-8.7r",      0x1800, 0x1000, CRC(2cb51793) SHA1(d90177ef28730774202a04a0846281537a1883df) )

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "mmi6331.2a", 0x0000, 0x0020, CRC(69a35aa5) SHA1(fe494ed1ff642f95834dfca92e9c4494e04f7b81) )
	ROM_LOAD( "mmi6331.2b", 0x0020, 0x0020, CRC(596ae457) SHA1(1c1a3130d88c5fd5c66ce9f91d97a09c0a0b535f) )
ROM_END

ROM_START( moguchan )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "2.5r",         0x0000, 0x1000, CRC(85d0cb7e) SHA1(20066f71d80161dff556bc86edf40fcc2ac3b993) )
	ROM_LOAD( "4.5m",         0x1000, 0x1000, CRC(359ef951) SHA1(93e80fcd371e8d2026919d0e046b636b7c19002e) )
	ROM_LOAD( "3.5np",        0x2000, 0x1000, CRC(c8776f77) SHA1(edc28a6a804b9573307faa25b6fdd096b7093593) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "1.7hj",        0x0000, 0x1000, CRC(1a88d35f) SHA1(d9347723c0eb6508739a6c0de4984b8244b197cf) )

	ROM_REGION( 0x2800, "gfx1", 0 )
	ROM_LOAD( "5.4r",         0x0000, 0x0800, CRC(1b7febd8) SHA1(4f9ce99f05e6e207bb91f831b6bee7cf72b3d05b) )
	ROM_LOAD( "6.7p",         0x0800, 0x1000, CRC(c8060ffe) SHA1(f1f975c2638e6cdf00af4a96591529c7b6684742) )
	ROM_LOAD( "7.7m",         0x1800, 0x1000, CRC(bfca00f4) SHA1(797b07bab2467fe00cd85cd4477db2367a3e5a40) )

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "moguchan.2a",  0x0000, 0x0020, CRC(e83daab3) SHA1(58b38091dfbc3f3b4ddf6c6febd98c909be89063) )
	ROM_LOAD( "moguchan.2b",  0x0020, 0x0020, CRC(9abfdf40) SHA1(44c4dcdd3d79af2c4a897cc003b5287dece0313e) )
ROM_END

ROM_START( percuss )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "percuss.1",    0x0000, 0x1000, CRC(ff0364f7) SHA1(048963d70e513068fdb591b4bc152473fe4cc2c3) )
	ROM_LOAD( "percuss.3",    0x1000, 0x1000, CRC(7f646c59) SHA1(976210f1fed11c03e0a159c8189630a1fec63fc9) )
	ROM_LOAD( "percuss.2",    0x2000, 0x1000, CRC(6bf72dd2) SHA1(447109a508a571650501d3dd3fa018513b4e4558) )
	ROM_LOAD( "percuss.4",    0x3000, 0x1000, CRC(fb1b15ba) SHA1(778853a0fbef7dd80d1046e2b04adcd9d1241f83) )
	ROM_LOAD( "percuss.5",    0x4000, 0x1000, CRC(8e5a9692) SHA1(17db644c3cd0435c380b2080bda02c6a6d45eaf6) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "percuss.8",    0x0000, 0x0800, CRC(d63f56f3) SHA1(2cf9cca55fb612c9efae06e62bd6d33fdd38de57) )
	ROM_LOAD( "percuss.9",    0x0800, 0x0800, CRC(e08fef2f) SHA1(af41763f200c4c660ca7230eace4f443e57e809a) )

	ROM_REGION( 0x2800, "gfx1", 0 )
	ROM_LOAD( "percuss.10",   0x0000, 0x0800, CRC(797598aa) SHA1(6d26ed5e964b7f1b2ce651c7bf0168a730bee02f) )
	ROM_LOAD( "percuss.6",    0x0800, 0x1000, CRC(5285a580) SHA1(cd7ba64706458c67166934d0fa08894fb577810b) )
	ROM_LOAD( "percuss.7",    0x1800, 0x1000, CRC(8fc4175d) SHA1(0249f6324ae44142d7da2306674ed86afcccf5f2) )

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "percus2a.prm", 0x0000, 0x0020, CRC(e2ee9637) SHA1(e4ca064793ae1dc36b2d852448162d062a2f26f8) )
	ROM_LOAD( "percus2b.prm", 0x0020, 0x0020, CRC(e561b029) SHA1(7d21a3492a179f5ce541911d19e4816960547089) )
ROM_END

ROM_START( bounty )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "1.4f",      0x0000, 0x1000, CRC(f495b19d) SHA1(df2de0869b10da1ee1d98d48615c9e1dce798c26) )
	ROM_LOAD( "3.4k",      0x1000, 0x1000, CRC(fa3086c3) SHA1(b8bab26a4e68e6d2e5b899e900c9affd297c22de) )
	ROM_LOAD( "2.4h",      0x2000, 0x1000, CRC(52ab5314) SHA1(ba399f8b86cc64d1dd585dde79d8036d24296475) )
	ROM_LOAD( "4.4m",      0x3000, 0x1000, CRC(5c9d3f07) SHA1(340460f38c5b23c591f92d386c0df10ed75fa16f) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "7.4n",      0x0000, 0x1000, CRC(45e369b8) SHA1(9799b2ece5e3b92da435255e1b49f5097d3f7972) )
	ROM_LOAD( "8.4r",      0x1000, 0x1000, CRC(4f52c87d) SHA1(1738d798c341a54d293c70da7b6e4a3dfb00de38) )

	ROM_REGION( 0x2800, "gfx1", 0 )
	ROM_LOAD( "9.4r",      0x0000, 0x0800, CRC(4b4acde5) SHA1(5ed60fe50a9ab0b8d433ee9ae5787b936ddbfbdd) )
	ROM_LOAD( "5.7m",      0x0800, 0x1000, CRC(a5ce2a24) SHA1(b5469d31bda52a61cdc46349c139a7eb339ac8a7) )
	ROM_LOAD( "6.7p",      0x1800, 0x1000, CRC(43183301) SHA1(9df89479396d7847ee3325649d7264e75d413add) )

	ROM_REGION( 0x0040, "proms", 0 )
	ROM_LOAD( "mb7051.2a",   0x0000, 0x0020, CRC(0de11a46) SHA1(3bc81571832dd78b29654e86479815ee5f97a4d3) )
	ROM_LOAD( "mb7051.2b",   0x0020, 0x0020, CRC(465e31d4) SHA1(d47a4aa0e8931dcd8f85017ef04c2f6ad79f5725) )
ROM_END


DRIVER_INIT_MEMBER(zodiack_state,zodiack)
{
	m_percuss_hardware = false;
}

DRIVER_INIT_MEMBER(zodiack_state,percuss)
{
	m_percuss_hardware = true;
}

GAME( 1983, zodiack,  0, zodiack, zodiack,  zodiack_state, zodiack, ROT270, "Orca (Esco Trading Co., Inc. license)", "Zodiack", GAME_IMPERFECT_COLORS | GAME_SUPPORTS_SAVE ) /* bullet color needs to be verified */
GAME( 1983, dogfight, 0, zodiack, dogfight, zodiack_state, zodiack, ROT270, "Orca / Thunderbolt", "Dog Fight (Thunderbolt)", GAME_IMPERFECT_COLORS | GAME_SUPPORTS_SAVE ) /* bullet color needs to be verified */
GAME( 1982, moguchan, 0, zodiack, moguchan, zodiack_state, percuss, ROT270, "Orca (Eastern Commerce Inc. license)", "Mogu Chan (bootleg?)", GAME_WRONG_COLORS | GAME_SUPPORTS_SAVE ) /* license copyright taken from ROM string at $0b5c */
GAME( 1981, percuss,  0, zodiack, percuss,  zodiack_state, percuss, ROT270, "Orca", "The Percussor", GAME_SUPPORTS_SAVE )
GAME( 1982, bounty,   0, zodiack, bounty,   zodiack_state, percuss, ROT180, "Orca", "The Bounty", GAME_SUPPORTS_SAVE )
