text: // license:BSD-3-Clause
  // copyright-holders:Angelo Salese, Pierpaolo Prazzoli
  /*****************************************************************************************
  
  Speed Attack! (c) 1984 Seta Kikaku Corp.
  
  driver by Pierpaolo Prazzoli & Angelo Salese, based on early work by David Haywood
  
  TODO:
   - It's possible that there is only one coin chute and not two,needs a real board to know
     more about it.
  
  How to play:
   - A to D selects a card.
   - Turn takes one or more cards into your hand (depends on how many cards you
     putted on the stacks).
   - Left & right puts a card on one of the two stacks.
  
  Notes:
   - According to the text gfx rom, there are also a Taito and a KKK versions out there.
  
  ------------------------------------------------------------------------------------------
  SPEED ATTACK!
  (c)SETA
  
  CPU :Z80 x 1
  SOUND   :AY-3-8910 x 1
  XTAL    :12MHZ
  
  SETA CUSTOM ?
  AC-002 , AC-003
  
  CB1-1   :1C
  CB0-2   :1D
  CB1-3   :1F
  CB0-4   :1H
  CB0-5   :7C
  CB0-6   :7D
  CB0-7   :7E
  
  CB1.BPR :7L TBP18S030
  CB2.BPR :6K 82S129
  
  ----------------------------------------------------------
  
  DIP SWITCH 8BIT (Default: ALL ON)
  
  SW 1,2 : COIN CREDIT   LL:1-1 HL:1-2 LH:1-5 HH:1-10
  SW 3,4 : LEVEL LL:EASY -> LH -> HL -> HH:HARD
  SW 5,6 : NOT USE
  SW 7   : FLIP SCREEN H:FLIP
  SW 8   : TEST MODE H:TEST
  
     PARTS SIDE | SOLDIER SIDE
    ----------------------------
        GND   | 1|    GND
        GND   | 2|    GND
        +5V   | 3|    +5V
              | 4|
       +12V   | 5|   +12V
    SPEAKER(+)| 6|  SPEAKER(-)
       SYNC   | 7| COIN COUNTER
         B    | 8|  SERVICE
         G    | 9|  COIN SW
         R    |10|
       PD 6   |11|   PS 6 (NOT USE)
       PD 5   |12|   PS 5 (NOT USE)
       PD 4   |13|   PS 4
       PD 3   |14|   PS 3
       PD 1   |15|   PS 1
       PD 2   |16|   PS 2
              |17|
              |18|
  
  PS / PD :  key matrix
  *****************************************************************************************/
  
  #include "emu.h"
  #include "includes/speedatk.h"
  
  #include "cpu/z80/z80.h"
  #include "machine/watchdog.h"
  #include "sound/ay8910.h"
  #include "screen.h"
  #include "speaker.h"
  
  
  #define MASTER_CLOCK XTAL(12'000'000)
  
  void speedatk_state::machine_start()
  {
  	save_item(NAME(m_mux_data));
  	save_item(NAME(m_km_status));
  	save_item(NAME(m_coin_settings));
  	save_item(NAME(m_coin_impulse));
  }
  
  uint8_t speedatk_state::iox_key_matrix_calc(uint8_t p_side)
  {
  	static const char *const keynames[] = { "P1_ROW0", "P1_ROW1", "P2_ROW0", "P2_ROW1" };
  
  	int i, j, t;
  
  	for (i = 0x00 ; i < 0x10 ; i += 8)
  	{
  		j = (i / 0x08);
  
  		for (t = 0 ; t < 8 ; t ++)
  		{
  			if (!(ioport(keynames[j+p_side])->read() & ( 1 << t )))
  			{
  				return (i + t) | (p_side ? 0x20 : 0x00);
  			}
  		}
  	}
  
  	return 0;
  }
  
  READ8_MEMBER(speedatk_state::key_matrix_r)
  {
  	if(m_coin_impulse > 0)
  	{
  		m_coin_impulse--;
  		return 0x80;
  	}
  
  	if((ioport("COINS")->read() & 1) || (ioport("COINS")->read() & 2))
  	{
  		m_coin_impulse = m_coin_settings;
  		m_coin_impulse--;
  		return 0x80;
  	}
  
  	if(m_mux_data != 1 && m_mux_data != 2 && m_mux_data != 4)
  		return 0xff; //unknown command
  
  	/* both side checks */
  	if(m_mux_data == 1)
  	{
  		uint8_t p1_side = iox_key_matrix_calc(0);
  		uint8_t p2_side = iox_key_matrix_calc(2);
  
  		if(p1_side != 0)
  			return p1_side;
  
  		return p2_side;
  	}
  
  	/* check individual input side */
  	return iox_key_matrix_calc((m_mux_data == 2) ? 0 : 2);
  }
  
  WRITE8_MEMBER(speedatk_state::key_matrix_w)
  {
  	m_mux_data = data;
  }
  
  /* Key matrix status,used for coin settings and I don't know what else... */
  READ8_MEMBER(speedatk_state::key_matrix_status_r)
  {
  	/* bit 0: busy flag,active low */
  	return (m_km_status & 0xfe) | 1;
  }
  
  /*
  xxxx ---- command
  ---- xxxx param
  My guess is that the other commands configs the key matrix, it probably needs some tests on the real thing.
  1f
  3f
  41
  61
  8x coinage setting command
  a1
  */
  WRITE8_MEMBER(speedatk_state::key_matrix_status_w)
  {
  	m_km_status = data;
  	if((m_km_status & 0xf0) == 0x80) //coinage setting command
  		m_coin_settings = m_km_status & 0xf;
  }
  
  void speedatk_state::speedatk_mem(address_map &map)
  {
  	map(0x0000, 0x7fff).rom();
  	map(0x8000, 0x8000).rw(this, FUNC(speedatk_state::key_matrix_r), FUNC(speedatk_state::key_matrix_w));
  	map(0x8001, 0x8001).rw(this, FUNC(speedatk_state::key_matrix_status_r), FUNC(speedatk_state::key_matrix_status_w));
  	map(0x8800, 0x8fff).ram();
  	map(0xa000, 0xa3ff).ram().share("videoram");
  	map(0xb000, 0xb3ff).ram().share("colorram");
  }
  
  
  void speedatk_state::speedatk_io(address_map &map)
  {
  	map.global_mask(0xff);
  	map(0x00, 0x01).w(this, FUNC(speedatk_state::m6845_w)); //h46505 address / data routing
  	map(0x24, 0x24).w("watchdog", FUNC(watchdog_timer_device::reset_w));
  	map(0x40, 0x40).r("aysnd", FUNC(ay8910_device::data_r));
  	map(0x40, 0x41).w("aysnd", FUNC(ay8910_device::address_data_w));
  	//what's 60-6f for? Seems used only in attract mode and read back when a 2p play ends ...
  }
  
  static INPUT_PORTS_START( speedatk )
  	PORT_START("DSW")
  	PORT_SERVICE( 0x01, IP_ACTIVE_HIGH )
  	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Flip_Screen ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
  	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( 0x30, 0x00, DEF_STR( Difficulty ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Easy ) )
  	PORT_DIPSETTING(    0x20, DEF_STR( Normal ) )
  	PORT_DIPSETTING(    0x10, DEF_STR( Hard ) )
  	PORT_DIPSETTING(    0x30, DEF_STR( Hardest ) )
  	PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(    0x80, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(    0x40, DEF_STR( 1C_5C ) )
  	PORT_DIPSETTING(    0xc0, "1 Coin/10 Credits" )
  
  	PORT_START("P1_ROW0")
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1) PORT_NAME("P1 B") PORT_CODE(KEYCODE_X)
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_NAME("P1 A") PORT_CODE(KEYCODE_Z)
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(1) PORT_NAME("P1 C") PORT_CODE(KEYCODE_C)
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(1) PORT_NAME("P1 D") PORT_CODE(KEYCODE_V)
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_PLAYER(1) PORT_NAME("P1 Left") PORT_CODE(KEYCODE_A)
  
  	PORT_START("P1_ROW1")
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_PLAYER(1) PORT_NAME("P1 Right") PORT_CODE(KEYCODE_S)
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START2 )
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON7 ) PORT_PLAYER(1) PORT_NAME("P1 Turn") PORT_CODE(KEYCODE_Q)
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
  
  	PORT_START("P2_ROW0")
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2) PORT_NAME("P2 B")
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_NAME("P2 A")
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(2) PORT_NAME("P2 C")
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(2) PORT_NAME("P2 D")
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_PLAYER(2) PORT_NAME("P2 Left")
  
  	PORT_START("P2_ROW1")
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_PLAYER(2) PORT_NAME("P2 Right")
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON7 ) PORT_PLAYER(2) PORT_NAME("P2 Turn")
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
  
  	PORT_START("COINS")
  	PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_IMPULSE(1)
  	PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_IMPULSE(1)
  INPUT_PORTS_END
  
  static const gfx_layout charlayout_1bpp =
  {
  	8,8,
  	RGN_FRAC(1,1),
  	3,
  	{ 0, 0, 0 },
  	{ 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 charlayout_3bpp =
  {
  	8,8,
  	RGN_FRAC(1,3),
  	3,
  	{ RGN_FRAC(2,3), RGN_FRAC(1,3), RGN_FRAC(0,3) },
  	{ 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( speedatk )
  	GFXDECODE_ENTRY( "gfx1", 0, charlayout_1bpp,   0, 32 )
  	GFXDECODE_ENTRY( "gfx2", 0, charlayout_3bpp,   0, 32 )
  GFXDECODE_END
  
  WRITE8_MEMBER(speedatk_state::output_w)
  {
  	m_flip_scr = data & 0x80;
  
  	if((data & 0x7f) != 0x7f)
  		logerror("%02x\n",data);
  }
  
  MACHINE_CONFIG_START(speedatk_state::speedatk)
  
  	MCFG_CPU_ADD("maincpu", Z80,MASTER_CLOCK/2) //divider is unknown
  	MCFG_CPU_PROGRAM_MAP(speedatk_mem)
  	MCFG_CPU_IO_MAP(speedatk_io)
  	MCFG_CPU_VBLANK_INT_DRIVER("screen", speedatk_state,  irq0_line_hold)
  
  	MCFG_WATCHDOG_ADD("watchdog")
  	MCFG_WATCHDOG_VBLANK_INIT("screen", 8) // timing is unknown
  
  	/* video hardware */
  	MCFG_SCREEN_ADD("screen", RASTER)
  	MCFG_SCREEN_REFRESH_RATE(60)
  	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
  	MCFG_SCREEN_SIZE(320, 256)
  	MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 32*8-1)
  	MCFG_SCREEN_UPDATE_DRIVER(speedatk_state, screen_update)
  	MCFG_SCREEN_PALETTE("palette")
  
  	MCFG_MC6845_ADD("crtc", H46505, "screen", MASTER_CLOCK/16)   /* hand tuned to get ~60 fps */
  	MCFG_MC6845_SHOW_BORDER_AREA(false)
  	MCFG_MC6845_CHAR_WIDTH(8)
  
  	MCFG_GFXDECODE_ADD("gfxdecode", "palette", speedatk)
  	MCFG_PALETTE_ADD("palette", 0x100)
  	MCFG_PALETTE_INDIRECT_ENTRIES(16)
  	MCFG_PALETTE_INIT_OWNER(speedatk_state, speedatk)
  
  	/* sound hardware */
  	MCFG_SPEAKER_STANDARD_MONO("mono")
  
  	MCFG_SOUND_ADD("aysnd", AY8910, MASTER_CLOCK/4) //divider is unknown
  	MCFG_AY8910_PORT_B_READ_CB(IOPORT("DSW"))
  	MCFG_AY8910_PORT_A_WRITE_CB(WRITE8(speedatk_state, output_w))
  	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.5)
  MACHINE_CONFIG_END
  
  ROM_START( speedatk )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "cb1-1",        0x0000, 0x2000, CRC(df988e05) SHA1(0ec91c5f2e1adf952a4fe7aede591e763773a75b) )
  	ROM_LOAD( "cb0-2",        0x2000, 0x2000, CRC(be949154) SHA1(8a594a7ebdc8456290919163f7ea4ccb0d1f4edb) )
  	ROM_LOAD( "cb1-3",        0x4000, 0x2000, CRC(741a5949) SHA1(7f7bebd4fb73fef9aa28549d100f632c442ac9b3) )
  	ROM_LOAD( "cb0-4",        0x6000, 0x2000, CRC(53a9c0c8) SHA1(cd0fd94411dabf09828c1f629891158c40794127) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "cb0-7",        0x0000, 0x2000, CRC(a86007b5) SHA1(8e5cab76c37a8d53e1355000cd1a0a85ffae0e8c) )
  
  	ROM_REGION( 0x6000, "gfx2", 0 )
  	ROM_LOAD( "cb0-5",        0x0000, 0x2000, CRC(47a966e7) SHA1(fdaa0f88656afc431bae367679ce6298fa962e0f) )
  	ROM_LOAD( "cb0-6",        0x2000, 0x2000, CRC(cc1da937) SHA1(1697bb008bfa5c33a282bd470ac39c324eea7509) )
  	ROM_COPY( "gfx2",         0x0000, 0x4000, 0x1000 ) /* Fill the blank space with cards gfx */
  	ROM_COPY( "gfx1",         0x1000, 0x5000, 0x1000 ) /* Gfx from cb0-7 */
  
  	ROM_REGION( 0x0120, "proms", 0 )
  	ROM_LOAD( "cb1.bpr",      0x0000, 0x0020, CRC(a0176c23) SHA1(133fb9eef8a6595cac2dcd7edce4789899a59e84) ) /* color PROM */
  	ROM_LOAD( "cb2.bpr",      0x0020, 0x0100, CRC(a604cf96) SHA1(a4ef6e77dcd3abe4c27e8e636222a5ee711a51f5) ) /* lookup table */
  ROM_END
  
  GAME( 1984, speedatk, 0, speedatk, speedatk, speedatk_state, 0, ROT0, "Seta Kikaku Corp.", "Speed Attack! (Japan)", MACHINE_SUPPORTS_SAVE )
  