text: /***************************************************************************
  
  	Model Racing Dribbling hardware
  
      driver by Aaron Giles
  
  	Games supported:
  		* Dribbling
  
  ****************************************************************************
  
  	Memory map
  
  ****************************************************************************
  
  	========================================================================
  	CPU #1
  	========================================================================
  	tbd
  	========================================================================
  	Interrupts:
  		NMI not connected
  		IRQ generated by VBLANK
  	========================================================================
  
  ***************************************************************************/
  
  #include "driver.h"
  #include "machine/8255ppi.h"
  #include "vidhrdw/generic.h"
  #include "dribling.h"
  
  
  
  /*************************************
   *
   *	Global variables
   *
   *************************************/
  
  /* referenced by the video hardware */
  data8_t dribling_abca;
  
  static data8_t dr, ds, sh;
  static data8_t input_mux;
  static data8_t di;
  
  
  
  /*************************************
   *
   *	Interrupt generation
   *
   *************************************/
  
  static INTERRUPT_GEN( dribling_irq_gen )
  {
  	if (di)
  		cpu_set_irq_line(0, 0, ASSERT_LINE);
  }
  
  
  
  /*************************************
   *
   *	PPI inputs
   *
   *************************************/
  
  static READ_HANDLER( dsr_r )
  {
  	/* return DSR0-7 */
  	return (ds << sh) | (dr >> (8 - sh));
  }
  
  
  static READ_HANDLER( input_mux0_r )
  {
  	/* low value in the given bit selects */
  	if (!(input_mux & 0x01))
  		return readinputport(0);
  	else if (!(input_mux & 0x02))
  		return readinputport(1);
  	else if (!(input_mux & 0x04))
  		return readinputport(2);
  	return 0xff;
  }
  
  
  
  /*************************************
   *
   *	PPI outputs
   *
   *************************************/
  
  static WRITE_HANDLER( misc_w )
  {
  	/* bit 7 = di */
  	di = (data >> 7) & 1;
  	if (!di)
  		cpu_set_irq_line(0, 0, CLEAR_LINE);
  
  	/* bit 6 = parata */
  
  	/* bit 5 = ab. campo */
  	dribling_abca = (data >> 5) & 1;
  
  	/* bit 4 = ab. a.b.f. */
  	/* bit 3 = n/c */
  
  	/* bit 2 = (9) = PC2 */
  	/* bit 1 = (10) = PC1 */
  	/* bit 0 = (32) = PC0 */
  	input_mux = data & 7;
  	log_cb(RETRO_LOG_DEBUG, LOGPRE "%04X:misc_w(%02X)\n", activecpu_get_previouspc(), data);
  }
  
  
  static WRITE_HANDLER( sound_w )
  {
  	/* bit 7 = stop palla */
  	/* bit 6 = contrasto */
  	/* bit 5 = calgio a */
  	/* bit 4 = fischio */
  	/* bit 3 = calcio b */
  	/* bit 2 = folla a */
  	/* bit 1 = folla m */
  	/* bit 0 = folla b */
  	log_cb(RETRO_LOG_DEBUG, LOGPRE "%04X:sound_w(%02X)\n", activecpu_get_previouspc(), data);
  }
  
  
  static WRITE_HANDLER( pb_w )
  {
  	/* write PB0-7 */
  	log_cb(RETRO_LOG_DEBUG, LOGPRE "%04X:pb_w(%02X)\n", activecpu_get_previouspc(), data);
  }
  
  
  static WRITE_HANDLER( shr_w )
  {
  	/* bit 3 = watchdog */
  	if (data & 0x08)
  		watchdog_reset_w(0, 0);
  
  	/* bit 2-0 = SH0-2 */
  	sh = data & 0x07;
  }
  
  
  
  /*************************************
   *
   *	PPI accessors
   *
   *************************************/
  
  static READ_HANDLER( ioread )
  {
  	if (offset & 0x08)
  		return ppi8255_0_r(offset & 3);
  	else if (offset & 0x10)
  		return ppi8255_1_r(offset & 3);
  	return 0xff;
  }
  
  
  static WRITE_HANDLER( iowrite )
  {
  	if (offset & 0x08)
  		ppi8255_0_w(offset & 3, data);
  	else if (offset & 0x10)
  		ppi8255_1_w(offset & 3, data);
  	else if (offset & 0x40)
  	{
  		dr = ds;
  		ds = data;
  	}
  }
  
  
  
  /*************************************
   *
   *	Machine init
   *
   *************************************/
  
  static ppi8255_interface ppi8255_intf =
  {
  	2,
  	{ dsr_r,        NULL           },
  	{ input_mux0_r, NULL           },
  	{ NULL,         input_port_3_r },
  	{ NULL,         sound_w        },
  	{ NULL,         pb_w           },
  	{ misc_w,       shr_w          }
  };
  
  static MACHINE_INIT( dribling )
  {
  	ppi8255_init(&ppi8255_intf);
  }
  
  
  
  /*************************************
   *
   *	Main CPU memory handlers
   *
   *************************************/
  
  static MEMORY_READ_START( readmem )
  	{ 0x0000, 0x1fff, MRA_ROM },
  	{ 0x2000, 0x3fff, MRA_RAM },
  	{ 0x4000, 0x7fff, MRA_ROM },
  	{ 0xc000, 0xdfff, MRA_RAM },
  MEMORY_END
  
  
  static MEMORY_WRITE_START( writemem )
  	{ 0x0000, 0x1fff, MWA_ROM },
  	{ 0x2000, 0x3fff, MWA_RAM, &videoram },
  	{ 0x4000, 0x7fff, MWA_ROM },
  	{ 0xc000, 0xdfff, dribling_colorram_w, &colorram },
  MEMORY_END
  
  
  static PORT_READ_START( readport )
  	{ 0x00, 0xff, ioread },
  MEMORY_END
  
  
  static PORT_WRITE_START( writeport )
  	{ 0x00, 0xff, iowrite },
  MEMORY_END
  
  
  
  /*************************************
   *
   *	Port definitions
   *
   *************************************/
  
  INPUT_PORTS_START( dribling )
  	PORT_START	/* IN0 (mux 0) */
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_LEFT  | IPF_PLAYER1 )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_RIGHT | IPF_PLAYER1 )
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_DOWN  | IPF_PLAYER1 )
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_UP    | IPF_PLAYER1 )
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_LEFT   | IPF_PLAYER1 )
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_RIGHT  | IPF_PLAYER1 )
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_DOWN   | IPF_PLAYER1 )
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_UP     | IPF_PLAYER1 )
  
  	PORT_START	/* IN0 (mux 1) */
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_LEFT  | IPF_PLAYER2 )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_RIGHT | IPF_PLAYER2 )
  	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_DOWN  | IPF_PLAYER2 )
  	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_UP    | IPF_PLAYER2 )
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_LEFT   | IPF_PLAYER2 )
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_RIGHT  | IPF_PLAYER2 )
  	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_DOWN   | IPF_PLAYER2 )
  	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_UP     | IPF_PLAYER2 )
  
  	PORT_START	/* IN0 (mux 2) */
  	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1             | IPF_PLAYER1 )
  	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2             | IPF_PLAYER1 )
  	PORT_BIT( 0x0c, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2             | IPF_PLAYER2 )
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1             | IPF_PLAYER2 )
  	PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
  
  	PORT_START	/* IN0 */
  	PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
  	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
  	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
  INPUT_PORTS_END
  
  
  
  /*************************************
   *
   *	Machine driver
   *
   *************************************/
  
  static MACHINE_DRIVER_START( dribling )
  
  	/* basic machine hardware */
  	MDRV_CPU_ADD(Z80, 5000000)
  	MDRV_CPU_MEMORY(readmem,writemem)
  	MDRV_CPU_PORTS(readport,writeport)
  	MDRV_CPU_VBLANK_INT(dribling_irq_gen,1)
  
  	MDRV_FRAMES_PER_SECOND(60)
  	MDRV_VBLANK_DURATION(DEFAULT_REAL_60HZ_VBLANK_DURATION)
  
  	MDRV_MACHINE_INIT(dribling)
  
  	/* video hardware */
  	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_UPDATE_BEFORE_VBLANK)
  	MDRV_SCREEN_SIZE(256, 256)
  	MDRV_VISIBLE_AREA(0, 255, 40, 255)
  	MDRV_PALETTE_LENGTH(256)
  
  	MDRV_PALETTE_INIT(dribling)
  	MDRV_VIDEO_UPDATE(dribling)
  
  	/* sound hardware */
  MACHINE_DRIVER_END
  
  
  
  /*************************************
   *
   *	ROM definitions
   *
   *************************************/
  
  ROM_START( dribling )
  	ROM_REGION( 0x10000, REGION_CPU1, 0 )
  	ROM_LOAD( "5p.bin",  0x0000, 0x1000, CRC(0e791947) SHA1(57bc4f4e9e1fe3fbac1017601c9c75029b2601a4) )
  	ROM_LOAD( "5n.bin",  0x1000, 0x1000, CRC(bd0f223a) SHA1(f9fbc5670a8723c091d61012e545774d315eb18f) ) /**/
  	ROM_LOAD( "5l.bin",  0x4000, 0x1000, CRC(1fccfc85) SHA1(c0365ad54144414218f52209173b858b927c9626) )
  	ROM_LOAD( "5k.bin",  0x5000, 0x1000, CRC(737628c4) SHA1(301fda413388c26da5b5150aec2cefc971801749) ) /**/
  	ROM_LOAD( "5h.bin",  0x6000, 0x1000, CRC(30d0957f) SHA1(52135e12094ee1c8828a48c355bdd565aa5895de) ) /**/
  
  	ROM_REGION( 0x2000, REGION_GFX1, 0 )
  	ROM_LOAD( "3p.bin",  0x0000, 0x1000, CRC(208971b8) SHA1(f91f3ea04d75beb58a61c844472b4dba53d84c0f) )
  	ROM_LOAD( "3n.bin",  0x1000, 0x1000, CRC(356c9803) SHA1(8e2ce52f32b33886f4747dadf3aeb78148538173) )
  
  	ROM_REGION( 0x600, REGION_PROMS, 0 )
  	ROM_LOAD( "prom_3c.bin", 0x0000, 0x0400, CRC(25f068de) SHA1(ea4c56c47fe8153069acb9df80df0b099f3b81f1) )
  	ROM_LOAD( "prom_3e.bin", 0x0400, 0x0100, CRC(73eba798) SHA1(7be0e253624df53092e26c28eb18afdcf71434aa) )
  	ROM_LOAD( "prom_2d.bin", 0x0500, 0x0100, CRC(5d8c57c6) SHA1(abfb54812d66a36e797be47653dadda4843e8a90) )
  ROM_END
  
  
  ROM_START( driblino )
  	ROM_REGION( 0x10000, REGION_CPU1, 0 )
  	ROM_LOAD( "5p.bin",       0x0000, 0x1000, CRC(0e791947) SHA1(57bc4f4e9e1fe3fbac1017601c9c75029b2601a4) )
  	ROM_LOAD( "dribblng.5n",  0x1000, 0x1000, CRC(5271e620) SHA1(ebed8e31057bb8492840a6e3b8bc453f7cb67243) )
  	ROM_LOAD( "5l.bin",       0x4000, 0x1000, CRC(1fccfc85) SHA1(c0365ad54144414218f52209173b858b927c9626) )
  	ROM_LOAD( "dribblng.5j",  0x5000, 0x1000, CRC(e535ac5b) SHA1(ba13298378f1e5b2b40634874097ad29c402fdea) )
  	ROM_LOAD( "dribblng.5h",  0x6000, 0x1000, CRC(e6af7264) SHA1(a015120d85461e599c4bb9626ebea296386a31bb) )
  
  	ROM_REGION( 0x2000, REGION_GFX1, 0 )
  	ROM_LOAD( "3p.bin",  0x0000, 0x1000, CRC(208971b8) SHA1(f91f3ea04d75beb58a61c844472b4dba53d84c0f) )
  	ROM_LOAD( "3n.bin",  0x1000, 0x1000, CRC(356c9803) SHA1(8e2ce52f32b33886f4747dadf3aeb78148538173) )
  
  	ROM_REGION( 0x600, REGION_PROMS, 0 )
  	ROM_LOAD( "prom_3c.bin", 0x0000, 0x0400, CRC(25f068de) SHA1(ea4c56c47fe8153069acb9df80df0b099f3b81f1) )
  	ROM_LOAD( "prom_3e.bin", 0x0400, 0x0100, CRC(73eba798) SHA1(7be0e253624df53092e26c28eb18afdcf71434aa) )
  	ROM_LOAD( "prom_2d.bin", 0x0500, 0x0100, CRC(5d8c57c6) SHA1(abfb54812d66a36e797be47653dadda4843e8a90) )
  ROM_END
  
  
  
  /*************************************
   *
   *	Game drivers
   *
   *************************************/
  
  GAMEX( 1983, dribling, 0,        dribling, dribling, 0, ROT0, "Model Racing", "Dribbling", GAME_NO_SOUND )
  GAMEX( 1983, driblino, dribling, dribling, dribling, 0, ROT0, "Model Racing (Olympia license)", "Dribbling (Olympia)", GAME_NO_SOUND )
  