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/* Galaxia

Galaxia by Zaccaria (1979)

Taken from an untested board.

1K byte files were 2708 or equivalent.
512 byte file is a 82S130 PROM.

This is not a direct pirate of Galaxian as you might think from the name.
The game uses a Signetics 2650A CPU with three 40-pin 2636 chips, which are
responsible for sound and some video functions.

Other than that, the video hardware looks like it's similar to Galaxian
(2 x 2114, 2 x 2101, 2 x EPROM) but there is no attack RAM and the graphics
EPROMS are 2708. The graphics EPROMS do contain Galaxian-like graphics...

Quick PCB sketch:
  ------------------------------------------------------------------------------
  |                                                                            |
  |                   13l    13i    13h                                        |
  |                                                                            |
  |    PROM           11l    11i    11h      S2636            S2621    XTAL    |
|6-|                                                                   ?MHz    |
  |                          10i    10h      S2636                             |
|5-|                                                                           |
|--|                          8i     8h      S2636                   S2650A    |
|--|                                                                           |
|--|                                                                           |
  |                                                                            |
|4-|                                                                           |
|--|                                                                           |
|--|                                                                           |
|--|                                                                           |
  |                                                                            |
|3-|                                                                           |
|--|                                                                           |
|--|                                                                           |
|--|       DSW                                                                 |
  |                                                     3d                     |
|2-|       DSW                                                                |-1|
  |                                                     1d                    |--|
  |                                                                           |--|
  ------------------------------------------------------------------------------

XTAL label is not readable on any PCB?

Astro Wars (port of Astro Fighter) is on a stripped down board of Galaxia,
using only one 2636 chip, less RAM, and no PROM.

---

HW has many similarities with quasar.c / cvs.c / zac2650.c

TODO:
- fix colors, there's no color prom?!
- improve bullets
- accurate astrowar sprite/bg sync
- XTAL

*/

#include "emu.h"
#include "machine/s2636.h"
#include "cpu/s2650/s2650.h"
#include "includes/galaxia.h"


INTERRUPT_GEN_MEMBER(galaxia_state::galaxia_interrupt)
{
	device.execute().set_input_line_and_vector(0, HOLD_LINE, 0x03);
	cvs_scroll_stars();
}


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

  I/O

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

WRITE8_MEMBER(galaxia_state::galaxia_video_w)
{
//  m_screen->update_partial(m_screen->vpos());
	m_bg_tilemap->mark_tile_dirty(offset);
	cvs_video_or_color_ram_w(space, offset, data);
}

WRITE8_MEMBER(galaxia_state::galaxia_scroll_w)
{
	m_screen->update_partial(m_screen->vpos());

	// fixed scrolling area
	for (int i = 1; i < 6; i++)
		m_bg_tilemap->set_scrolly(i, data);
}

WRITE8_MEMBER(galaxia_state::galaxia_ctrlport_w)
{
	// d0/d1: maybe coincounter
	// other bits: unknown
}

WRITE8_MEMBER(galaxia_state::galaxia_dataport_w)
{
	// cvs-style video fx? or lamps?
}

READ8_MEMBER(galaxia_state::galaxia_collision_r)
{
	m_screen->update_partial(m_screen->vpos());
	return m_collision_register;
}

READ8_MEMBER(galaxia_state::galaxia_collision_clear)
{
	m_screen->update_partial(m_screen->vpos());
	m_collision_register = 0;
	return 0xff;
}

static ADDRESS_MAP_START( galaxia_mem_map, AS_PROGRAM, 8, galaxia_state )
	AM_RANGE(0x0000, 0x13ff) AM_ROM
	AM_RANGE(0x1400, 0x14ff) AM_MIRROR(0x6000) AM_RAM AM_SHARE("bullet_ram")
	AM_RANGE(0x1500, 0x15ff) AM_MIRROR(0x6000) AM_DEVREADWRITE("s2636_0", s2636_device, work_ram_r, work_ram_w)
	AM_RANGE(0x1600, 0x16ff) AM_MIRROR(0x6000) AM_DEVREADWRITE("s2636_1", s2636_device, work_ram_r, work_ram_w)
	AM_RANGE(0x1700, 0x17ff) AM_MIRROR(0x6000) AM_DEVREADWRITE("s2636_2", s2636_device, work_ram_r, work_ram_w)
	AM_RANGE(0x1800, 0x1bff) AM_MIRROR(0x6000) AM_READ(cvs_video_or_color_ram_r) AM_WRITE(galaxia_video_w) AM_SHARE("video_ram")
	AM_RANGE(0x1c00, 0x1fff) AM_MIRROR(0x6000) AM_RAM
	AM_RANGE(0x2000, 0x33ff) AM_ROM
	AM_RANGE(0x7214, 0x7214) AM_READ_PORT("IN0")
ADDRESS_MAP_END

static ADDRESS_MAP_START( astrowar_mem_map, AS_PROGRAM, 8, galaxia_state )
	AM_RANGE(0x0000, 0x13ff) AM_ROM
	AM_RANGE(0x1400, 0x14ff) AM_MIRROR(0x6000) AM_RAM
	AM_RANGE(0x1500, 0x15ff) AM_MIRROR(0x6000) AM_DEVREADWRITE("s2636_0", s2636_device, work_ram_r, work_ram_w)
	AM_RANGE(0x1800, 0x1bff) AM_MIRROR(0x6000) AM_READ(cvs_video_or_color_ram_r) AM_WRITE(galaxia_video_w)  AM_SHARE("video_ram")
	AM_RANGE(0x1c00, 0x1cff) AM_MIRROR(0x6000) AM_RAM AM_SHARE("bullet_ram")
	AM_RANGE(0x2000, 0x33ff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START( galaxia_io_map, AS_IO, 8, galaxia_state )
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE(0x00, 0x00) AM_WRITE(galaxia_scroll_w) AM_READ_PORT("IN0")
	AM_RANGE(0x02, 0x02) AM_READ_PORT("IN1")
	AM_RANGE(0x05, 0x05) AM_READNOP
	AM_RANGE(0x06, 0x06) AM_READ_PORT("DSW0")
	AM_RANGE(0x07, 0x07) AM_READ_PORT("DSW1")
	AM_RANGE(0xac, 0xac) AM_READNOP
	AM_RANGE(S2650_CTRL_PORT, S2650_CTRL_PORT) AM_READWRITE(galaxia_collision_r, galaxia_ctrlport_w)
	AM_RANGE(S2650_DATA_PORT, S2650_DATA_PORT) AM_READWRITE(galaxia_collision_clear, galaxia_dataport_w)
	AM_RANGE(S2650_SENSE_PORT, S2650_SENSE_PORT) AM_READ_PORT("SENSE")
ADDRESS_MAP_END


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

  Inputs

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

static INPUT_PORTS_START( galaxia )
	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_COIN2 ) PORT_IMPULSE(1)
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_IMPULSE(1)
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1 )
	PORT_BIT( 0xc0, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START("IN1")
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_PLAYER(2)
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_PLAYER(2)
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY
	PORT_BIT( 0xc3, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START("DSW0")
	PORT_DIPNAME( 0x07, 0x00, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x00, "A 1C_1C B 2C_1C" )
	PORT_DIPSETTING(    0x01, "A 1C_2C B 2C_1C" )
	PORT_DIPSETTING(    0x02, "A 1C_3C B 2C_1C" )
	PORT_DIPSETTING(    0x03, "A 1C_5C B 2C_1C" )
	PORT_DIPSETTING(    0x04, "A 1C_1C B 1C_1C" )
	PORT_DIPSETTING(    0x05, "A 1C_2C B 1C_1C" )
	PORT_DIPSETTING(    0x06, "A 1C_3C B 1C_1C" )
	PORT_DIPSETTING(    0x07, "A 1C_5C B 1C_1C" )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "3" )
	PORT_DIPSETTING(    0x08, "5" )

	PORT_DIPNAME( 0x10, 0x00, "UNK04" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, "UNK05" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x00, "UNK06" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, "UNK07" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x01, 0x00, "UNK10" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x00, "UNK11" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x00, "UNK12" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x00, "UNK13" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On ) )

	PORT_DIPNAME( 0x10, 0x00, "UNK14" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, "UNK15" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x00, "UNK16" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, "UNK17" )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

	PORT_START("SENSE")
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen")
INPUT_PORTS_END


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

  Machine Configs

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

static const gfx_layout tiles8x8x1_layout =
{
	8,8,
	RGN_FRAC(1,1),
	1,
	{ RGN_FRAC(0,1) },
	{ 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
};

static const gfx_layout tiles8x8x2_layout =
{
	8,8,
	RGN_FRAC(1,2),
	2,
	{ RGN_FRAC(0,2), RGN_FRAC(1,2) },
	{ 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
};

static GFXDECODE_START( galaxia )
	GFXDECODE_ENTRY( "gfx1", 0, tiles8x8x2_layout, 0, 4 )
GFXDECODE_END

static GFXDECODE_START( astrowar )
	GFXDECODE_ENTRY( "gfx1", 0, tiles8x8x1_layout, 0, 8 )
GFXDECODE_END


static const s2636_interface galaxia_s2636_config[3] =
{
	{ 0x100, 3, -26 },
	{ 0x100, 3, -26 },
	{ 0x100, 3, -26 }
};

static const s2636_interface astrowar_s2636_config =
{
	0x100,
	3, 0
};


static MACHINE_CONFIG_START( galaxia, galaxia_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", S2650, 2000000)      /* ? MHz */
	MCFG_CPU_PROGRAM_MAP(galaxia_mem_map)
	MCFG_CPU_IO_MAP(galaxia_io_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", galaxia_state,  galaxia_interrupt)

	/* video hardware */
	MCFG_VIDEO_ATTRIBUTES(VIDEO_ALWAYS_UPDATE)
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
	MCFG_SCREEN_SIZE(256, 256)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 30*8-1, 2*8, 32*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(galaxia_state, screen_update_galaxia)

	MCFG_GFXDECODE(galaxia)
	MCFG_PALETTE_LENGTH(0x18+2)

	MCFG_PALETTE_INIT_OVERRIDE(galaxia_state,galaxia)
	MCFG_VIDEO_START_OVERRIDE(galaxia_state,galaxia)

	MCFG_S2636_ADD("s2636_0", galaxia_s2636_config[0])
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
	MCFG_S2636_ADD("s2636_1", galaxia_s2636_config[1])
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
	MCFG_S2636_ADD("s2636_2", galaxia_s2636_config[2])
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)

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

MACHINE_CONFIG_END


static MACHINE_CONFIG_START( astrowar, galaxia_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", S2650, 2000000)      /* ? MHz */
	MCFG_CPU_PROGRAM_MAP(astrowar_mem_map)
	MCFG_CPU_IO_MAP(galaxia_io_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", galaxia_state,  galaxia_interrupt)

	/* video hardware */
	MCFG_VIDEO_ATTRIBUTES(VIDEO_ALWAYS_UPDATE)
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
	MCFG_SCREEN_SIZE(256, 256)
	MCFG_SCREEN_VISIBLE_AREA(1*8, 31*8-1, 2*8, 32*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(galaxia_state, screen_update_astrowar)

	MCFG_GFXDECODE(astrowar)
	MCFG_PALETTE_LENGTH(0x18+2)

	MCFG_PALETTE_INIT_OVERRIDE(galaxia_state,astrowar)
	MCFG_VIDEO_START_OVERRIDE(galaxia_state,astrowar)

	MCFG_S2636_ADD("s2636_0", astrowar_s2636_config)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)

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


MACHINE_CONFIG_END


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

  Game drivers

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

ROM_START( galaxia )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "galaxia.8h",  0x00000, 0x0400, CRC(f3b4ffde) SHA1(15b004e7821bfc145158b1e9435f061c524f6b86) )
	ROM_LOAD( "galaxia.10h", 0x00400, 0x0400, CRC(6d07fdd4) SHA1(d7d4b345a055275d59951788569db370bccd5195) )
	ROM_LOAD( "galaxia.11h", 0x00800, 0x0400, CRC(1520eb3d) SHA1(3683174da701e1124af0f9c2ee4a9a84f3fea33a) )
	ROM_LOAD( "galaxia.13h", 0x00c00, 0x0400, CRC(c4482770) SHA1(aee983cc3d80989f49aea4138961bb623039484a) )
	ROM_LOAD( "galaxia.8i",  0x01000, 0x0400, CRC(45b88599) SHA1(3b79c21db1aa9d80fac81ac5a554e438805febd1) )
	ROM_LOAD( "galaxia.10i", 0x02000, 0x0400, CRC(c0baa654) SHA1(80e0880c32ad285fbce0f7f552268b964b97cab3) )
	ROM_LOAD( "galaxia.11i", 0x02400, 0x0400, CRC(4456808a) SHA1(f9e8cfdde0e17f13f1be297b2b4503ccc959b33c) )
	ROM_LOAD( "galaxia.13i", 0x02800, 0x0400, CRC(cf653b9a) SHA1(fef5943de60cb5ba2459fc6ae7419e29c96a76cd) )
	ROM_LOAD( "galaxia.11l", 0x02c00, 0x0400, CRC(50c6a645) SHA1(46638907bc393df6be25fc7461d73047d1746ffc) )
	ROM_LOAD( "galaxia.13l", 0x03000, 0x0400, CRC(3a9c38c7) SHA1(d1e934092b69c0f3f9636eba05a1d8a6d9588e6b) )

	ROM_REGION( 0x0800, "gfx1", 0 )
	ROM_LOAD( "galaxia.1d", 0x00000, 0x0400, CRC(2dd50aab) SHA1(758d7a5383c9a1ee134d99e3f7025819cfbe0e0f) )
	ROM_LOAD( "galaxia.3d", 0x00400, 0x0400, CRC(1dc30185) SHA1(e3c75eecb80b376ece98f602e1b9587487841824) )

	ROM_REGION( 0x0200, "proms", 0 ) // unknown function
	ROM_LOAD( "prom.11o", 0x0000, 0x0200, CRC(ae816417) SHA1(9497857d13c943a2735c3b85798199054e613b2c) )
ROM_END

ROM_START( astrowar )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "astro.8h",  0x00000, 0x0400, CRC(b0ec246c) SHA1(f9123b5e317938655f5e8b3f8a5810d0b2b7c7af) )
	ROM_LOAD( "astro.10h", 0x00400, 0x0400, CRC(090d360f) SHA1(528ddcdc30a5a291bd8850ff6f134fcc19af562f) )
	ROM_LOAD( "astro.11h", 0x00800, 0x0400, CRC(72ab1378) SHA1(50743c64c4775076aa6f1d8ab2e05c14884bf0ba) )
	ROM_LOAD( "astro.13h", 0x00c00, 0x0400, CRC(2dc4c895) SHA1(831afbfd4ebfd6522ab0758222bc6f9826148a5d) )
	ROM_LOAD( "astro.8i",  0x01000, 0x0400, CRC(ab87fbfc) SHA1(34b670f96c260f186c643e588995ae5d80377784) )
	ROM_LOAD( "astro.10i", 0x02000, 0x0400, CRC(533675c1) SHA1(69cc066e1874a135a53a21b7b2461bda456504f1) )
	ROM_LOAD( "astro.11i", 0x02400, 0x0400, CRC(59cf8901) SHA1(e849d4c99350b7e3453c156d91618b71b5be1163) )
	ROM_LOAD( "astro.13i", 0x02800, 0x0400, CRC(5149c121) SHA1(232ba594e283fb25c31d8ae0b7d8315a81852a71) )
	ROM_LOAD( "astro.11l", 0x02c00, 0x0400, CRC(29f52f57) SHA1(5cb50b82e09c537eeaeae167351fca686fde8228) )
	ROM_LOAD( "astro.13l", 0x03000, 0x0400, CRC(882cdb87) SHA1(062ee8d296316cbce2eb62e72774aa4181e9847d) )

	ROM_REGION( 0x0800, "gfx1", 0 )
	ROM_LOAD( "astro.1d",  0x00000, 0x0400, CRC(6053f834) SHA1(e0b76800c241b3c8010c09869cecbc109b25310a) )
	ROM_LOAD( "astro.3d",  0x00400, 0x0400, CRC(822505aa) SHA1(f9d3465e14bb850a286f8b4f42aa0a4044413b67) )
ROM_END


GAME( 1979, galaxia,  0, galaxia,  galaxia, driver_device, 0, ROT90, "Zaccaria / Zelco", "Galaxia",    GAME_IMPERFECT_COLORS | GAME_IMPERFECT_GRAPHICS )
GAME( 1980, astrowar, 0, astrowar, galaxia, driver_device, 0, ROT90, "Zaccaria / Zelco", "Astro Wars", GAME_IMPERFECT_COLORS | GAME_IMPERFECT_GRAPHICS )