text: /***************************************************************************
  
  F-1 Grand Prix       (c) 1991 Video System Co.
  
  driver by Nicola Salmoria
  
  Notes:
  - The ROZ layer generator is a Konami 053936.
  - f1gp2's hardware is very similar to Lethal Crash Race, main difference
    being an extra 68000.
  
  TODO:
  f1gp:
  - gfxctrl register not understood - handling of fg/sprite priority to fix
    "continue" screen is just a kludge.
  f1gp2:
  - sprite lag noticeable in the animation at the end of a race (the wheels
    of the car are sprites while the car is the fg tilemap)
  
  ***************************************************************************/
  
  #include "driver.h"
  #include "cpu/z80/z80.h"
  #include "cpu/m68000/m68000.h"
  #include "video/konamiic.h"
  #include "f1gp.h"
  #include "sound/2610intf.h"
  #include "sound/okim6295.h"
  
  
  static UINT16 *sharedram;
  
  static READ16_HANDLER( sharedram_r )
  {
  	return sharedram[offset];
  }
  
  static WRITE16_HANDLER( sharedram_w )
  {
  	COMBINE_DATA(&sharedram[offset]);
  }
  
  static READ16_HANDLER( extrarom_r )
  {
  	UINT8 *rom = memory_region(space->machine, "user1");
  
  	offset *= 2;
  
  	return rom[offset] | (rom[offset+1] << 8);
  }
  
  static READ16_HANDLER( extrarom2_r )
  {
  	UINT8 *rom = memory_region(space->machine, "user2");
  
  	offset *= 2;
  
  	return rom[offset] | (rom[offset+1] << 8);
  }
  
  static WRITE8_HANDLER( f1gp_sh_bankswitch_w )
  {
  	UINT8 *rom = memory_region(space->machine, "audiocpu") + 0x10000;
  
  	memory_set_bankptr(space->machine, 1,rom + (data & 0x01) * 0x8000);
  }
  
  
  static int pending_command;
  
  static WRITE16_HANDLER( sound_command_w )
  {
  	if (ACCESSING_BITS_0_7)
  	{
  		pending_command = 1;
  		soundlatch_w(space, offset, data & 0xff);
  		cputag_set_input_line(space->machine, "audiocpu", INPUT_LINE_NMI, PULSE_LINE);
  	}
  }
  
  static READ16_HANDLER( command_pending_r )
  {
  	return (pending_command ? 0xff : 0);
  }
  
  static WRITE8_HANDLER( pending_command_clear_w )
  {
  	pending_command = 0;
  }
  
  
  
  static ADDRESS_MAP_START( f1gp_cpu1_map, ADDRESS_SPACE_PROGRAM, 16 )
  	AM_RANGE(0x000000, 0x03ffff) AM_ROM
  	AM_RANGE(0x100000, 0x2fffff) AM_READ(extrarom_r)
  	AM_RANGE(0xa00000, 0xbfffff) AM_READ(extrarom2_r)
  	AM_RANGE(0xc00000, 0xc3ffff) AM_READWRITE(f1gp_zoomdata_r, f1gp_zoomdata_w)
  	AM_RANGE(0xd00000, 0xd01fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w) AM_BASE(&f1gp_rozvideoram)
  	AM_RANGE(0xd02000, 0xd03fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w) AM_BASE(&f1gp_rozvideoram) /* mirror */
  	AM_RANGE(0xd04000, 0xd05fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w) AM_BASE(&f1gp_rozvideoram) /* mirror */
  	AM_RANGE(0xd06000, 0xd07fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w) AM_BASE(&f1gp_rozvideoram) /* mirror */
  	AM_RANGE(0xe00000, 0xe03fff) AM_RAM AM_BASE(&f1gp_spr1cgram) AM_SIZE(&f1gp_spr1cgram_size)				// SPR-1 CG RAM
  	AM_RANGE(0xe04000, 0xe07fff) AM_RAM AM_BASE(&f1gp_spr2cgram) AM_SIZE(&f1gp_spr2cgram_size)				// SPR-2 CG RAM
  	AM_RANGE(0xf00000, 0xf003ff) AM_RAM AM_BASE(&f1gp_spr1vram)												// SPR-1 VRAM
  	AM_RANGE(0xf10000, 0xf103ff) AM_RAM AM_BASE(&f1gp_spr2vram)												// SPR-2 VRAM
  	AM_RANGE(0xff8000, 0xffbfff) AM_RAM																		// WORK RAM-1
  	AM_RANGE(0xffc000, 0xffcfff) AM_READWRITE(sharedram_r, sharedram_w) AM_BASE(&sharedram)					// DUAL RAM
  	AM_RANGE(0xffd000, 0xffdfff) AM_RAM_WRITE(f1gp_fgvideoram_w) AM_BASE(&f1gp_fgvideoram)					// CHARACTER
  	AM_RANGE(0xffe000, 0xffefff) AM_RAM_WRITE(paletteram16_xRRRRRGGGGGBBBBB_word_w) AM_BASE(&paletteram16)	// PALETTE
  	AM_RANGE(0xfff000, 0xfff001) AM_READ_PORT("INPUTS")
  	AM_RANGE(0xfff000, 0xfff001) AM_WRITE(f1gp_gfxctrl_w)
  //  AM_RANGE(0xfff002, 0xfff003)    analog wheel?
  	AM_RANGE(0xfff004, 0xfff005) AM_READ_PORT("DSW1")
  	AM_RANGE(0xfff002, 0xfff005) AM_WRITE(f1gp_fgscroll_w)
  	AM_RANGE(0xfff006, 0xfff007) AM_READ_PORT("DSW2")
  	AM_RANGE(0xfff008, 0xfff009) AM_READ(command_pending_r)
  	AM_RANGE(0xfff008, 0xfff009) AM_WRITE(sound_command_w)
  	AM_RANGE(0xfff040, 0xfff05f) AM_WRITE(SMH_RAM) AM_BASE(&K053936_0_ctrl)
  	AM_RANGE(0xfff050, 0xfff051) AM_READ_PORT("DSW3")
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( f1gp2_cpu1_map, ADDRESS_SPACE_PROGRAM, 16 )
  	AM_RANGE(0x000000, 0x03ffff) AM_ROM
  	AM_RANGE(0x100000, 0x2fffff) AM_READ(extrarom_r)
  	AM_RANGE(0xa00000, 0xa07fff) AM_RAM AM_BASE(&f1gp2_sprcgram)													// SPR-1 CG RAM + SPR-2 CG RAM
  	AM_RANGE(0xd00000, 0xd01fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w) AM_BASE(&f1gp_rozvideoram)	// BACK VRAM
  	AM_RANGE(0xe00000, 0xe00fff) AM_RAM AM_BASE(&f1gp2_spritelist)													// not checked + SPR-1 VRAM + SPR-2 VRAM
  	AM_RANGE(0xff8000, 0xffbfff) AM_RAM																				// WORK RAM-1
  	AM_RANGE(0xffc000, 0xffcfff) AM_READWRITE(sharedram_r, sharedram_w) AM_BASE(&sharedram)							// DUAL RAM
  	AM_RANGE(0xffd000, 0xffdfff) AM_RAM_WRITE(f1gp_fgvideoram_w) AM_BASE(&f1gp_fgvideoram)							// CHARACTER
  	AM_RANGE(0xffe000, 0xffefff) AM_RAM_WRITE(paletteram16_xRRRRRGGGGGBBBBB_word_w) AM_BASE(&paletteram16)			// PALETTE
  	AM_RANGE(0xfff000, 0xfff001) AM_READ_PORT("INPUTS") AM_WRITE(f1gp2_gfxctrl_w)
  //  AM_RANGE(0xfff002, 0xfff003)    analog wheel?
  	AM_RANGE(0xfff004, 0xfff005) AM_READ_PORT("DSW1")
  	AM_RANGE(0xfff006, 0xfff007) AM_READ_PORT("DSW2")
  	AM_RANGE(0xfff008, 0xfff009) AM_READWRITE(command_pending_r, sound_command_w)
  	AM_RANGE(0xfff00a, 0xfff00b) AM_READ_PORT("DSW3")
  	AM_RANGE(0xfff020, 0xfff02f) AM_WRITE(SMH_RAM) AM_BASE(&K053936_0_ctrl)
  	AM_RANGE(0xfff044, 0xfff047) AM_WRITE(f1gp_fgscroll_w)
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( f1gp_cpu2_map, ADDRESS_SPACE_PROGRAM, 16 )
  	AM_RANGE(0x000000, 0x01ffff) AM_ROM
  	AM_RANGE(0xff8000, 0xffbfff) AM_RAM
  	AM_RANGE(0xffc000, 0xffcfff) AM_READWRITE(sharedram_r, sharedram_w)
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( sound_map, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x77ff) AM_ROM
  	AM_RANGE(0x7800, 0x7fff) AM_RAM
  	AM_RANGE(0x8000, 0xffff) AM_ROMBANK(1)
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( sound_io_map, ADDRESS_SPACE_IO, 8 )
  	ADDRESS_MAP_GLOBAL_MASK(0xff)
  	AM_RANGE(0x00, 0x00) AM_WRITE(f1gp_sh_bankswitch_w)	// f1gp
  	AM_RANGE(0x0c, 0x0c) AM_WRITE(f1gp_sh_bankswitch_w)	// f1gp2
  	AM_RANGE(0x14, 0x14) AM_READWRITE(soundlatch_r, pending_command_clear_w)
  	AM_RANGE(0x18, 0x1b) AM_DEVREADWRITE("ym", ym2610_r, ym2610_w)
  ADDRESS_MAP_END
  
  static WRITE16_HANDLER( f1gpb_misc_w )
  {
  	/*
      static int old=-1;
      static int old_bank = -1;
      int new_bank = (data & 0xf0) >> 4; //wrong!
  
      if(old_bank != new_bank && new_bank < 5)
      {
          // oki banking
          UINT8 *src = memory_region(space->machine, "oki") + 0x40000 + 0x10000 * new_bank;
          UINT8 *dst = memory_region(space->machine, "oki") + 0x30000;
          memcpy(dst, src, 0x10000);
  
          old_bank = new_bank;
      }
  
      //data & 0x80 toggles
  
      if((data & 0x7f) != old)
          printf("misc = %X\n",old=data & 0x7f);
  
      */
  }
  
  static ADDRESS_MAP_START( f1gpb_cpu1_map, ADDRESS_SPACE_PROGRAM, 16 )
  	AM_RANGE(0x000000, 0x03ffff) AM_ROM
  	AM_RANGE(0x100000, 0x2fffff) AM_READ(extrarom_r)
  	AM_RANGE(0xa00000, 0xbfffff) AM_READ(extrarom2_r)
  	AM_RANGE(0x800000, 0x801fff) AM_RAM AM_BASE(&spriteram16) AM_SIZE(&spriteram_size)
  	AM_RANGE(0xc00000, 0xc3ffff) AM_READWRITE(f1gp_zoomdata_r, f1gp_zoomdata_w)
  	AM_RANGE(0xd00000, 0xd01fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w) AM_BASE(&f1gp_rozvideoram)
  	AM_RANGE(0xd02000, 0xd03fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w)	/* mirror */
  	AM_RANGE(0xd04000, 0xd05fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w)	/* mirror */
  	AM_RANGE(0xd06000, 0xd07fff) AM_READWRITE(f1gp_rozvideoram_r, f1gp_rozvideoram_w)	/* mirror */
  	AM_RANGE(0xe00000, 0xe03fff) AM_RAM //unused
  	AM_RANGE(0xe04000, 0xe07fff) AM_RAM //unused
  	AM_RANGE(0xf00000, 0xf003ff) AM_RAM //unused
  	AM_RANGE(0xf10000, 0xf103ff) AM_RAM //unused
  	AM_RANGE(0xff8000, 0xffbfff) AM_RAM
  	AM_RANGE(0xffc000, 0xffcfff) AM_READWRITE(sharedram_r, sharedram_w) AM_BASE(&sharedram)
  	AM_RANGE(0xffd000, 0xffdfff) AM_RAM_WRITE(f1gp_fgvideoram_w) AM_BASE(&f1gp_fgvideoram)
  	AM_RANGE(0xffe000, 0xffefff) AM_RAM_WRITE(paletteram16_xRRRRRGGGGGBBBBB_word_w) AM_BASE(&paletteram16)
  	AM_RANGE(0xfff000, 0xfff001) AM_READ_PORT("INPUTS")
  	AM_RANGE(0xfff004, 0xfff005) AM_READ_PORT("DSW1")
  	AM_RANGE(0xfff006, 0xfff007) AM_READ_PORT("DSW2")
  	AM_RANGE(0xfff008, 0xfff009) AM_READNOP //?
  	AM_RANGE(0xfff006, 0xfff007) AM_WRITENOP
  	AM_RANGE(0xfff00a, 0xfff00b) AM_RAM AM_BASE(&f1gpb_fgregs)
  	AM_RANGE(0xfff00e, 0xfff00f) AM_DEVREADWRITE8("oki", okim6295_r, okim6295_w, 0x00ff)
  	AM_RANGE(0xfff00c, 0xfff00d) AM_WRITE(f1gpb_misc_w)
  	AM_RANGE(0xfff010, 0xfff011) AM_WRITENOP
  	AM_RANGE(0xfff020, 0xfff023) AM_RAM //?
  	AM_RANGE(0xfff050, 0xfff051) AM_READ_PORT("DSW3")
  	AM_RANGE(0xfff800, 0xfff809) AM_RAM AM_BASE(&f1gpb_rozregs)
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( f1gpb_cpu2_map, ADDRESS_SPACE_PROGRAM, 16 )
  	AM_RANGE(0x000000, 0x01ffff) AM_ROM
  	AM_RANGE(0xff8000, 0xffbfff) AM_RAM
  	AM_RANGE(0xffc000, 0xffcfff) AM_READWRITE(sharedram_r, sharedram_w)
  	AM_RANGE(0xfff030, 0xfff031) AM_NOP //?
  ADDRESS_MAP_END
  
  static INPUT_PORTS_START( f1gp )
  	PORT_START("INPUTS")
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_2WAY
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_2WAY
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON2 )
  	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON1 )
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_COIN2 )
  	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_UNKNOWN )
  	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_SERVICE1 )
  	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNKNOWN )
  
  	PORT_START("DSW1")
  	PORT_DIPNAME( 0x0100, 0x0100, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0100, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0e00, 0x0e00, DEF_STR( Coin_A ) )
  	PORT_DIPSETTING(      0x0a00, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(      0x0c00, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(      0x0e00, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(      0x0800, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(      0x0600, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(      0x0400, DEF_STR( 1C_4C ) )
  	PORT_DIPSETTING(      0x0200, DEF_STR( 1C_5C ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( 1C_6C ) )
  	PORT_DIPNAME( 0x7000, 0x7000, DEF_STR( Coin_B ) )
  	PORT_DIPSETTING(      0x5000, DEF_STR( 3C_1C ) )
  	PORT_DIPSETTING(      0x6000, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(      0x7000, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(      0x4000, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING(      0x3000, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING(      0x2000, DEF_STR( 1C_4C ) )
  	PORT_DIPSETTING(      0x1000, DEF_STR( 1C_5C ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( 1C_6C ) )
  	PORT_DIPNAME( 0x8000, 0x8000, "2 to Start, 1 to Cont." )	// Other desc. was too long !
  	PORT_DIPSETTING(      0x8000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0003, 0x0003, DEF_STR( Difficulty ) )
  	PORT_DIPSETTING(      0x0002, DEF_STR( Easy ) )
  	PORT_DIPSETTING(      0x0003, DEF_STR( Normal ) )
  	PORT_DIPSETTING(      0x0001, DEF_STR( Hard ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( Hardest ) )
  	PORT_DIPNAME( 0x0004, 0x0004, "Game Mode" )
  	PORT_DIPSETTING(      0x0004, DEF_STR( Single ) )
  	PORT_DIPSETTING(      0x0000, "Multiple" )
  	PORT_DIPNAME( 0x0008, 0x0008, "Multi Player" )
  	PORT_DIPSETTING(      0x0008, "Type 1" )
  	PORT_DIPSETTING(      0x0000, "Type 2" )
  	PORT_DIPNAME( 0x0010, 0x0010, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0010, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0020, 0x0020, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0020, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0040, 0x0040, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0040, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0080, 0x0080, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0080, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  
  	PORT_START("DSW2")
  	PORT_SERVICE( 0x0100, IP_ACTIVE_LOW )
  	PORT_DIPNAME( 0x0200, 0x0200, DEF_STR( Flip_Screen ) )
  	PORT_DIPSETTING(      0x0200, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0400, 0x0000, DEF_STR( Demo_Sounds ) )
  	PORT_DIPSETTING(      0x0400, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x0800, 0x0800, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x0800, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x1000, 0x1000, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x1000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x2000, 0x2000, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x2000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x4000, 0x4000, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x4000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  	PORT_DIPNAME( 0x8000, 0x8000, DEF_STR( Unknown ) )
  	PORT_DIPSETTING(      0x8000, DEF_STR( Off ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
  
  	PORT_START("DSW3")
  	PORT_DIPNAME( 0x001f, 0x0010, "Country" )
  	PORT_DIPSETTING(      0x0010, DEF_STR( World ) )
  	PORT_DIPSETTING(      0x0001, "USA & Canada" )
  	PORT_DIPSETTING(      0x0000, DEF_STR( Japan ) )
  	PORT_DIPSETTING(      0x0002, "Korea" )
  	PORT_DIPSETTING(      0x0004, "Hong Kong" )
  	PORT_DIPSETTING(      0x0008, "Taiwan" )
  	/* all other values are invalid */
  INPUT_PORTS_END
  
  
  /* the same as f1gp, but with an extra button */
  static INPUT_PORTS_START( f1gp2 )
  	PORT_INCLUDE( f1gp )
  
  	PORT_MODIFY("INPUTS")
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_BUTTON3 )
  
  	PORT_MODIFY("DSW3")
  	PORT_DIPNAME( 0x0001, 0x0001, "Country" )
  	PORT_DIPSETTING(      0x0001, DEF_STR( World ) )
  	PORT_DIPSETTING(      0x0000, DEF_STR( Japan ) )
  	PORT_DIPUNUSED( 0x001e, 0x001e )
  INPUT_PORTS_END
  
  
  
  static const gfx_layout charlayout =
  {
  	8,8,
  	RGN_FRAC(1,1),
  	8,
  	{ 0, 1, 2, 3, 4, 5, 6, 7 },
  	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
  	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64 },
  	64*8
  };
  
  static const gfx_layout tilelayout =
  {
  	16,16,
  	RGN_FRAC(1,1),
  	4,
  	{ 0, 1, 2, 3 },
  	{ 2*4, 3*4, 0*4, 1*4, 6*4, 7*4, 4*4, 5*4,
  			10*4, 11*4, 8*4, 9*4, 14*4, 15*4, 12*4, 13*4 },
  	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64,
  			8*64, 9*64, 10*64, 11*64, 12*64, 13*64, 14*64, 15*64 },
  	64*16
  };
  
  #define XOR(a) WORD_XOR_BE(a)
  
  static const gfx_layout tilelayout2 =
  {
  	16,16,
  	0x800,
  	4,
  	{ 0, 1, 2, 3 },
  	{ XOR(0)*4, XOR(1)*4, XOR(2)*4, XOR(3)*4, XOR(4)*4, XOR(5)*4, XOR(6)*4, XOR(7)*4,
  			XOR(8)*4, XOR(9)*4, XOR(10)*4, XOR(11)*4, XOR(12)*4, XOR(13)*4, XOR(14)*4, XOR(15)*4 },
  	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64,
  			8*64, 9*64, 10*64, 11*64, 12*64, 13*64, 14*64, 15*64 },
  	64*16
  };
  
  static const gfx_layout spritelayout =
  {
  	16,16,
  	RGN_FRAC(1,1),
  	4,
  	{ 0, 1, 2, 3 },
  	{ 1*4, 0*4, 3*4, 2*4, 5*4, 4*4, 7*4, 6*4,
  			9*4, 8*4, 11*4, 10*4, 13*4, 12*4, 15*4, 14*4 },
  	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64,
  			8*64, 9*64, 10*64, 11*64, 12*64, 13*64, 14*64, 15*64 },
  	128*8
  };
  
  static GFXDECODE_START( f1gp )
  	GFXDECODE_ENTRY( "gfx1", 0, charlayout,   0x000,  1 )
  	GFXDECODE_ENTRY( "gfx2", 0, spritelayout, 0x100, 16 )
  	GFXDECODE_ENTRY( "gfx3", 0, spritelayout, 0x200, 16 )
  	GFXDECODE_ENTRY( "gfx4", 0, tilelayout2,  0x300, 16 )
  GFXDECODE_END
  
  static GFXDECODE_START( f1gp2 )
  	GFXDECODE_ENTRY( "gfx1", 0, charlayout,   0x000,  1 )
  	GFXDECODE_ENTRY( "gfx2", 0, spritelayout, 0x200, 32 )
  	GFXDECODE_ENTRY( "gfx3", 0, tilelayout,   0x100, 16 )
  GFXDECODE_END
  
  
  
  static void irqhandler(const device_config *device, int irq)
  {
  	cputag_set_input_line(device->machine, "audiocpu", 0, irq ? ASSERT_LINE : CLEAR_LINE);
  }
  
  static const ym2610_interface ym2610_config =
  {
  	irqhandler
  };
  
  
  
  static MACHINE_DRIVER_START( f1gp )
  
  	/* basic machine hardware */
  	MDRV_CPU_ADD("maincpu",M68000,XTAL_20MHz/2)	/* verified on pcb */
  	MDRV_CPU_PROGRAM_MAP(f1gp_cpu1_map)
  	MDRV_CPU_VBLANK_INT("screen", irq1_line_hold)
  
  	MDRV_CPU_ADD("sub", M68000,XTAL_20MHz/2)	/* verified on pcb */
  	MDRV_CPU_PROGRAM_MAP(f1gp_cpu2_map)
  	MDRV_CPU_VBLANK_INT("screen", irq1_line_hold)
  
  	MDRV_CPU_ADD("audiocpu", Z80,XTAL_20MHz/4)	/* verified on pcb */
  	MDRV_CPU_PROGRAM_MAP(sound_map)
  	MDRV_CPU_IO_MAP(sound_io_map)
  
  	MDRV_QUANTUM_TIME(HZ(6000)) /* 100 CPU slices per frame */
  
  	/* video hardware */
  	MDRV_SCREEN_ADD("screen", RASTER)
  	MDRV_SCREEN_REFRESH_RATE(60)
  	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
  	MDRV_SCREEN_SIZE(64*8, 32*8)
  	MDRV_SCREEN_VISIBLE_AREA(0*8, 40*8-1, 1*8, 31*8-1)
  
  	MDRV_GFXDECODE(f1gp)
  	MDRV_PALETTE_LENGTH(2048)
  
  	MDRV_VIDEO_START(f1gp)
  	MDRV_VIDEO_UPDATE(f1gp)
  
  	/* sound hardware */
  	MDRV_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
  
  	MDRV_SOUND_ADD("ym", YM2610, XTAL_8MHz)
  	MDRV_SOUND_CONFIG(ym2610_config)
  	MDRV_SOUND_ROUTE(0, "lspeaker",  0.25)
  	MDRV_SOUND_ROUTE(0, "rspeaker", 0.25)
  	MDRV_SOUND_ROUTE(1, "lspeaker",  1.0)
  	MDRV_SOUND_ROUTE(2, "rspeaker", 1.0)
  MACHINE_DRIVER_END
  
  
  static MACHINE_DRIVER_START( f1gpb )
  
  	/* basic machine hardware */
  	MDRV_CPU_ADD("maincpu",M68000,10000000)	/* 10 MHz ??? */
  	MDRV_CPU_PROGRAM_MAP(f1gpb_cpu1_map)
  	MDRV_CPU_VBLANK_INT("screen", irq1_line_hold)
  
  	MDRV_CPU_ADD("sub", M68000,10000000)	/* 10 MHz ??? */
  	MDRV_CPU_PROGRAM_MAP(f1gpb_cpu2_map)
  	MDRV_CPU_VBLANK_INT("screen", irq1_line_hold)
  
  	/* NO sound CPU */
  	MDRV_QUANTUM_TIME(HZ(6000)) /* 100 CPU slices per frame */
  
  	/* video hardware */
  	MDRV_SCREEN_ADD("screen", RASTER)
  	MDRV_SCREEN_REFRESH_RATE(60)
  	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
  	MDRV_SCREEN_SIZE(64*8, 32*8)
  	MDRV_SCREEN_VISIBLE_AREA(0*8, 40*8-1, 1*8, 31*8-1)
  
  	MDRV_GFXDECODE(f1gp)
  	MDRV_PALETTE_LENGTH(2048)
  
  	MDRV_VIDEO_START(f1gpb)
  	MDRV_VIDEO_UPDATE(f1gpb)
  
  	/* sound hardware */
  	MDRV_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
  
  	MDRV_SOUND_ADD("oki", OKIM6295, 1000000)
  	MDRV_SOUND_CONFIG(okim6295_interface_pin7high) // clock frequency & pin 7 not verified
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.50)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.50)
  MACHINE_DRIVER_END
  
  
  static MACHINE_DRIVER_START( f1gp2 )
  
  	/* basic machine hardware */
  	MDRV_IMPORT_FROM(f1gp)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(f1gp2_cpu1_map)
  
  	/* video hardware */
  	MDRV_GFXDECODE(f1gp2)
  	MDRV_SCREEN_MODIFY("screen")
  	MDRV_SCREEN_VISIBLE_AREA(0*8, 40*8-1, 0*8, 28*8-1)
  
  	MDRV_VIDEO_START(f1gp2)
  	MDRV_VIDEO_UPDATE(f1gp2)
  MACHINE_DRIVER_END
  
  
  
  ROM_START( f1gp )
  	ROM_REGION( 0x40000, "maincpu", 0 )	/* 68000 code */
  	ROM_LOAD16_WORD_SWAP( "rom1-a.3",     0x000000, 0x20000, CRC(2d8f785b) SHA1(6eca42ad2d57a31e055496141c89cb537f284378) )
  
  	ROM_REGION( 0x200000, "user1", 0 )	/* extra ROMs mapped at 100000 */
  	ROM_LOAD16_BYTE( "rom11-a.2",    0x000000, 0x40000, CRC(53df8ea1) SHA1(25d50bb787f3bd35c9a8ae2b0ab9a21e000debb0) )
  	ROM_LOAD16_BYTE( "rom10-a.1",    0x000001, 0x40000, CRC(46a289fb) SHA1(6a8c19e08b6d836fe83378fd77fead82a0b2db7c) )
  	ROM_LOAD16_BYTE( "rom13-a.4",    0x080000, 0x40000, CRC(7d92e1fa) SHA1(c23f5beea85b0804c61ef9e7f131b186d076221f) )
  	ROM_LOAD16_BYTE( "rom12-a.3",    0x080001, 0x40000, CRC(d8c1bcf4) SHA1(d6d77354eb1ab413ba8cfa5d973cf5b0c851c23b) )
  	ROM_LOAD16_BYTE( "rom6-a.6",     0x100000, 0x40000, CRC(6d947a3f) SHA1(2cd01ee2a73ab105a45a5464a29fd75aa43ba2db) )
  	ROM_LOAD16_BYTE( "rom7-a.5",     0x100001, 0x40000, CRC(7a014ba6) SHA1(8f0abbb68100e396e5a41337254cb6bf1a2ed00b) )
  	ROM_LOAD16_BYTE( "rom9-a.8",     0x180000, 0x40000, CRC(49286572) SHA1(c5e16bd1ccd43452337a4cd76db70db079ca0706) )
  	ROM_LOAD16_BYTE( "rom8-a.7",     0x180001, 0x40000, CRC(0ed783c7) SHA1(c0c467ede51c08d84999897c6d5cc8b584b23b67) )
  
  	ROM_REGION( 0x200000, "user2", 0 )	/* extra ROMs mapped at a00000 */
  											/* containing gfx data for the 053936 */
  	ROM_LOAD( "rom2-a.06",    0x000000, 0x100000, CRC(747dd112) SHA1(b9264bec61467ab256cf6cb698b6e0ea8f8006e0) )
  	ROM_LOAD( "rom3-a.05",    0x100000, 0x100000, CRC(264aed13) SHA1(6f0de860d4299befffc530b7a8f19656982a51c4) )
  
  	ROM_REGION( 0x20000, "sub", 0 )	/* 68000 code */
  	ROM_LOAD16_WORD_SWAP( "rom4-a.4",     0x000000, 0x20000, CRC(8e811d36) SHA1(2b806b50a3a307a21894687f16485ace287a7c4c) )
  
  	ROM_REGION( 0x30000, "audiocpu", 0 )	/* 64k for the audio CPU + banks */
  	ROM_LOAD( "rom5-a.8",     0x00000, 0x08000, CRC(9ea36e35) SHA1(9254dea8362318d8cfbd5e36e476e0e235e6326a) )
  	ROM_CONTINUE(             0x10000, 0x18000 )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "rom3-b.07",    0x000000, 0x100000, CRC(ffb1d489) SHA1(9330b67e0eaaf67d6c38f40a02c72419bd38fb81) )
  	ROM_LOAD( "rom2-b.04",    0x100000, 0x100000, CRC(d1b3471f) SHA1(d1a95fbaad1c3d9ec2121bf65abbcdb5441bd0ac) )
  
  	ROM_REGION( 0x100000, "gfx2", 0 )
  	ROM_LOAD32_WORD( "rom5-b.2",     0x000000, 0x80000, CRC(17572b36) SHA1(c58327c2f708783a3e8470e290cae0d71454f1da) )
  	ROM_LOAD32_WORD( "rom4-b.3",     0x000002, 0x80000, CRC(72d12129) SHA1(11da6990a54ae1b6f6d0bed5d0431552f83a0dda) )
  
  	ROM_REGION( 0x080000, "gfx3", 0 )
  	ROM_LOAD32_WORD( "rom7-b.17",    0x000000, 0x40000, CRC(2aed9003) SHA1(45ff9953ad98063573e7fd7b930ae8b0183cdd04) )
  	ROM_LOAD32_WORD( "rom6-b.16",    0x000002, 0x40000, CRC(6789ef12) SHA1(9b0d1cc6e9c6398ccb7f635c4c148fddd224a21f) )
  
  	ROM_REGION( 0x40000, "gfx4", ROMREGION_ERASE00 )	/* gfx data for the 053936 */
  	/* RAM, not ROM - handled at run time */
  
  	ROM_REGION( 0x100000, "ym.deltat", 0 ) /* sound samples */
  	ROM_LOAD( "rom14-a.09",   0x000000, 0x100000, CRC(b4c1ac31) SHA1(acab2e1b5ce4ca3a5c4734562481b54db4b46995) )
  
  	ROM_REGION( 0x100000, "ym", 0 ) /* sound samples */
  	ROM_LOAD( "rom17-a.08",   0x000000, 0x100000, CRC(ea70303d) SHA1(8de1a0e6d47cd80a622663c1745a1da54cd0ea05) )
  ROM_END
  
  /* This is a bootleg of f1gp, produced by Playmark in Italy
     the video hardware is different, it lacks the sound z80, and has less samples
   */
  
  ROM_START( f1gpb )
  	ROM_REGION( 0x40000, "maincpu", 0 )	/* 68000 code */
  	/* these have extra data at 0x30000 which isn't preset in the f1gp set, is it related to the changed sound hardware? */
  	ROM_LOAD16_BYTE( "1.ic38",     0x000001, 0x20000, CRC(046dd83a) SHA1(ea65fa88f9d9a79664de666e63594a7a7de86650) )
  	ROM_LOAD16_BYTE( "7.ic39",     0x000000, 0x20000, CRC(960f5db4) SHA1(addc461538e2140afae400e8d7364d0bcc42a0cb) )
  
  	ROM_REGION( 0x200000, "user1", 0 )	/* extra ROMs mapped at 100000 */
  	ROM_LOAD16_BYTE( "2.ic48",    0x000000, 0x80000, CRC(b3b315c3) SHA1(568592e450401cd95206dbe439e565dd28499dd1) )
  	ROM_LOAD16_BYTE( "8.ic41",    0x000001, 0x80000, CRC(39af8180) SHA1(aa1577195b1463069870db2d64db3b5e61d6bbe8) )
  	ROM_LOAD16_BYTE( "3.ic165",   0x100000, 0x80000, CRC(b7295a30) SHA1(4120dda38673d59343aea0f030d2f275a0ae3d95) )
  	ROM_LOAD16_BYTE( "9.ic166",   0x100001, 0x80000, CRC(bb596d5b) SHA1(f29ed135e8f09d4a15353360a811c13aba681382) )
  
  	ROM_REGION( 0x200000, "user2", 0 )	/* extra ROMs mapped at a00000 */
  	ROM_LOAD16_BYTE( "4.ic42",    0x000000, 0x80000, CRC(5dbde98a) SHA1(536553eaad0ebfe219e44a4f50a4707209024469) )
  	ROM_LOAD16_BYTE( "10.ic43",   0x000001, 0x80000, CRC(d60e7706) SHA1(23c383e47e6600a68d6fd8bcfc9552fe0d660630) )
  	ROM_LOAD16_BYTE( "5.ic167",   0x100000, 0x80000, CRC(48c36293) SHA1(2a5d92537ba331a99697d13b4394b8d2737eeaf2) )
  	ROM_LOAD16_BYTE( "11.ic168",  0x100001, 0x80000, CRC(92a28e52) SHA1(dc203486b96fdc1930f7e63021e84f203540a64e) )
  
  	ROM_REGION( 0x20000, "sub", 0 )	/* 68000 code */
  	ROM_LOAD16_BYTE( "16.u7",     0x000000, 0x10000, CRC(7609d818) SHA1(eb841b8e7b34f1c677f1a79bfeda5dafc1f6849f) )
  	ROM_LOAD16_BYTE( "17.u6",     0x000001, 0x10000, CRC(951befde) SHA1(28754f00ca0fe38fe1d4e68c203a7b401baa9714) )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "13.ic151",    0x000000, 0x080000, CRC(4238074b) SHA1(a6b169165c7f7da9e746db8f1fb02e15c02c2b60) )
  	ROM_LOAD( "12.ic152",    0x080000, 0x080000, CRC(e97c2b6e) SHA1(3d964999b70af2f39a734eba3feec6d4583261c7) )
  	ROM_LOAD( "15.ic153",    0x100000, 0x080000, CRC(c2867d7f) SHA1(86b1be9672cf9f610e1d7efff90d6a73dc1cdb90) )
  	ROM_LOAD( "14.ic154",    0x180000, 0x080000, CRC(0cd20423) SHA1(cddad02247b898c0a5a2fe061c41f68ecdf04d5c) )
  
  	/*
      Roms 20 and 21 were missing from the PCB, however the others match perfectly (just with a different data layout)
      I've reconstructed what should be the correct data for this bootleg.
  
      Note, the bootleg combines 2 GFX regions into a single set of 4-way interleaved roms, so we load them in a user
      region and use ROM_COPY.
      */
  
  	ROM_REGION( 0x200000, "user3", 0 )
  	ROMX_LOAD( "rom21",        0x000003, 0x80000, CRC(7a08c3b7) SHA1(369123348a88513c066c239ed6aa4db5ae4ef0ac), ROM_SKIP(3) )
  	ROMX_LOAD( "rom20",        0x000001, 0x80000, CRC(bd1273d0) SHA1(cc7caee231fe3bd87d8403d34059e1292c7f7a00), ROM_SKIP(3) )
  	ROMX_LOAD( "19.ic141",     0x000002, 0x80000, CRC(aa4ebdfe) SHA1(ed117e6a84554c5ed2ad4379b834898a4c40d51e), ROM_SKIP(3) )
  	ROMX_LOAD( "18.ic140",     0x000000, 0x80000, CRC(9b2a4325) SHA1(b2020e08251366686c4c0045f3fd523fa327badf), ROM_SKIP(3) )
  
  	ROM_REGION( 0x100000, "gfx2", 0 )
  	ROM_COPY("user3", 0, 0, 0x100000)
  
  	ROM_REGION( 0x080000, "gfx3", 0 )
  	ROM_COPY("user3", 0x100000, 0, 0x80000)
  
  	ROM_REGION( 0x40000, "gfx4", ROMREGION_ERASE00 )	/* gfx data for the 053936 */
  	/* RAM, not ROM - handled at run time */
  
  	ROM_REGION( 0x90000, "oki", 0 ) /* sound samples */
  	ROM_LOAD( "6.ic13",   0x000000, 0x030000, CRC(6e83ffd8) SHA1(618fd6cd6c0844a4be96f77ff22cd41364718d16) )
  	ROM_CONTINUE(         0x040000, 0x050000 )
  ROM_END
  
  
  ROM_START( f1gp2 )
  	ROM_REGION( 0x40000, "maincpu", 0 )	/* 68000 code */
  	ROM_LOAD16_BYTE( "rom12.v1",     0x000000, 0x20000, CRC(c5c5f199) SHA1(56fcbf1d9b15a37204296c578e1585599f76a107) )
  	ROM_LOAD16_BYTE( "rom14.v2",     0x000001, 0x20000, CRC(dd5388e2) SHA1(66e88f86edc2407e5794519f988203a52d65636d) )
  
  	ROM_REGION( 0x200000, "user1", 0 )	/* extra ROMs mapped at 100000 */
  	ROM_LOAD( "rom2",         0x100000, 0x100000, CRC(3b0cfa82) SHA1(ea6803dd8d30aa9f3bd578e113fc26f20c640751) )
  	ROM_CONTINUE(             0x000000, 0x100000 )
  
  	ROM_REGION( 0x20000, "sub", 0 )	/* 68000 code */
  	ROM_LOAD16_WORD_SWAP( "rom13.v3",     0x000000, 0x20000, CRC(c37aa303) SHA1(0fe09b398191888620fb676ed0f1593be575512d) )
  
  	ROM_REGION( 0x30000, "audiocpu", 0 )	/* 64k for the audio CPU + banks */
  	ROM_LOAD( "rom5.v4",      0x00000, 0x08000, CRC(6a9398a1) SHA1(e907fe5f9c135c5b10ec650ec0c6d08cb856230c) )
  	ROM_CONTINUE(             0x10000, 0x18000 )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "rom1",         0x000000, 0x200000, CRC(f2d55ad7) SHA1(2f2d9dc4fab63b06ed7cba0ef1ced286dbfaa7b4) )
  
  	ROM_REGION( 0x200000, "gfx2", 0 )
  	ROM_LOAD( "rom15",        0x000000, 0x200000, CRC(1ac03e2e) SHA1(9073d0ae24364229a993046bd71e403988692993) )
  
  	ROM_REGION( 0x400000, "gfx3", 0 )
  	ROM_LOAD( "rom11",        0x000000, 0x100000, CRC(b22a2c1f) SHA1(b5e67726be5a8561cd04c3c07895b8518b73b89c) )
  	ROM_LOAD( "rom10",        0x100000, 0x100000, CRC(43fcbe23) SHA1(54ab58d904890a0b907e674f855092e974c45edc) )
  	ROM_LOAD( "rom9",         0x200000, 0x100000, CRC(1bede8a1) SHA1(325ecc3afb30d281c2c8a56719e83e4dc20545bb) )
  	ROM_LOAD( "rom8",         0x300000, 0x100000, CRC(98baf2a1) SHA1(df7bd1a743ad0a6e067641e2b7a352c466875ef6) )
  
  	ROM_REGION( 0x080000, "ym.deltat", 0 ) /* sound samples */
  	ROM_LOAD( "rom4",         0x000000, 0x080000, CRC(c2d3d7ad) SHA1(3178096741583cfef1ca8f53e6efa0a59e1d5cb6) )
  
  	ROM_REGION( 0x100000, "ym", 0 ) /* sound samples */
  	ROM_LOAD( "rom3",         0x000000, 0x100000, CRC(7f8f066f) SHA1(5e051d5feb327ac818e9c7f7ac721dada3a102b6) )
  ROM_END
  
  
  GAME( 1991, f1gp,  0,    f1gp,  f1gp,  0, ROT90, "Video System Co.", "F-1 Grand Prix",         GAME_NO_COCKTAIL )
  GAME( 1991, f1gpb, f1gp, f1gpb, f1gp,  0, ROT90, "[Video System Co.] (Playmark bootleg)", "F-1 Grand Prix (Playmark bootleg)", GAME_NOT_WORKING ) // PCB marked 'Super Formula II', manufactured by Playmark.
  
  GAME( 1992, f1gp2, 0,    f1gp2, f1gp2, 0, ROT90, "Video System Co.", "F-1 Grand Prix Part II", GAME_NO_COCKTAIL )
  
  