text: /***************************************************************************
  
      Sasuke vs. Commander
      SNK
  
      driver by ?
  
      Games supported:
          * Sasuke vs. Commander
          * Satan of Saturn          [2 sets]
          * Zarzon (clone of 'satansat')
          * Vanguard                 [3 sets]
          * Fantasy                  [3 sets]       G-202
          * Pioneer Balloon                         G-204
          * Nibbler                  [4 sets]       G-208
  
      DIP locations verified from manual for:
          * Zarzon    (Satan of Saturn uses the same code, so I guess locations are the same)
          * Vanguard
          * Nibbler
  
  ****************************************************************************
  
  Vanguard memory map (preliminary)
  
  0000-03ff RAM
  0400-07ff Video RAM 1
  0800-0bff Video RAM 2
  0c00-0fff Color RAM (3 bits for video RAM 1 and 3 bits for video RAM 2)
  1000-1fff Character generator RAM
  4000-bfff ROM
  
  read:
  3104      IN0
  3105      IN1
  3106      DSW
  3107      IN2
  
  write
  3100      Sound Port 0
  3101      Sound Port 1
  3103      bit 7 = flip screen
  3200      y scroll register
  3300      x scroll register
  
  ****************************************************************************
  
  Fantasy and Nibbler memory map (preliminary)
  
  0000-03ff RAM
  0400-07ff Video RAM 1
  0800-0bff Video RAM 2
  0c00-0fff Color RAM (3 bits for video RAM 1 and 3 bits for video RAM 2)
  1000-1fff Character generator RAM
  3000-bfff ROM
  
  read:
  2104      IN0
  2105      IN1
  2106      DSW
  2107      IN2
  
  write
  2000-2001 To the HD46505S video controller
  2100      Sound Port 0
  2101      Sound Port 1
  2103      bit 7 = flip screen
            bit 4-6 = music 2
            bit 3 = char bank selector
            bit 0-2 = background color
  2200      y scroll register
  2300      x scroll register
  
  Interrupts: VBlank causes an IRQ. Coin insertion causes a NMI.
  
  ****************************************************************************
  
  Pioneer Balloon memory map (preliminary)
  
  0000-03ff RAM          IC13 cpu
  0400-07ff Video RAM 1  IC67 video
  0800-0bff Video RAM 2  ???? video
  0c00-0fff Color RAM    IC68 (3 bits for VRAM 1 and 3 bits for VRAM 2)
  1000-1fff RAM          ???? Character generator
  3000-3fff ROM 4/5      IC12
  4000-4fff ROM 1        IC07
  5000-5fff ROM 2        IC08
  6000-6fff ROM 3        IC09
  7000-7fff ROM 4        IC10
  8000-8fff ROM 5        IC14
  9000-9fff ROM 6        IC15
  
  read:
  b104      IN0
  b105      IN1
  b106      DSW
  b107      IN2
  
  write
  b000      Sound Port 0
  b001      Sound Port 1
  b100      ????
  b103      bit 7 = flip screen
            bit 4-6 = music 2
            bit 3 = char bank selector
            bit 0-2 = background color
  b106      ????
  b200      y scroll register
  b300      x scroll register
  
  Interrupts: VBlank causes an IRQ. Coin insertion causes a NMI.
  
  ****************************************************************************
  
  Stephh's notes (based on the games M6502 code and some tests) :
  
  1a) 'vanguard'
  
    - There are 5 different coinage settings according to the game code
      which are based on DSW bits 1 to 3 :
  
        bit 3   bit 2   bit 1    effect
         OFF     OFF     OFF      1C_1C
         OFF     OFF     ON       2C_1C   (manual tells this is the default setting)
         OFF     ON      OFF      1C_3C
         ON      OFF     OFF      1C_2C
         ON      ON      OFF      1C_6C
  
      The 3 other combinaisons give 1C_1C
    - From the manual, it says that DSW bit 6 determines the cost of a game :
        * bit 6 = 0 : "25c / game"
        * bit 6 = 1 : "50c / game"
      When you look at the game code, it appears to be some of "Bonus Coinage" :
        * bit 6 = 0 : you get an additional credit each time you insert 1 coin
        * bit 6 = 1 : you get an additional credit each time you insert 2 coins
    - So, instead of having something like this :
          PORT_DIPNAME( 0x0e, 0x02, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW1:!2,!3,!4")
          PORT_DIPSETTING(    0x02, "25c= 1C/1C 2C/3C 50c= 2C/2C" )
          PORT_DIPSETTING(    0x00, "25c= 1C/2C 50c= 1C/1C 2C/3C" )
          PORT_DIPSETTING(    0x08, "25c= 1C/3C 50c= 1C/2C 2C/5C" )
          PORT_DIPSETTING(    0x04, "25c= 1C/4C 50c= 1C/3C 2C/7C" )
          PORT_DIPSETTING(    0x0c, "25c= 1C/7C 50c= 1C/6C 2C/13C" )
          duplicate settings - untested in game code
          PORT_DIPSETTING(    0x06, "25c= 1C/2C 50c= 1C/1C 2C/3C" )
          PORT_DIPSETTING(    0x0a, "25c= 1C/2C 50c= 1C/1C 2C/3C" )
          PORT_DIPSETTING(    0x0e, "25c= 1C/2C 50c= 1C/1C 2C/3C" )
          ...
          PORT_DIPNAME( 0x40, 0x00, "Game Cost" ) PORT_DIPLOCATION("SW1:!7")
          PORT_DIPSETTING(    0x00, "25c / game" )
          PORT_DIPSETTING(    0x40, "50c / game" )
      or using conditional Dip Switches, I've coded this the way I did.
    - You can always continue, provided you're on the 1st pattern.
      The continue text is in English !
    - 10 letters when you enter your initials
  
  1b) 'vangrdce'
  
    - Code for coinage is the same as for 'vanguard'.
    - You can always continue, provided you're on the 1st pattern.
      The continue text is in English !
    - 3 letters when you enter your initials
  
  1c) 'vanguarj'
  
    - Code for coinage is the same as for 'vanguard'.
    - You can always continue, provided you're on the 1st pattern.
      The continue text is in Japanese !
    - 10 letters when you enter your initials
  
  2a) 'fantasy'
  
    - Code for coinage is the same as for 'vanguard'.
    - You can always continue, provided you're on the 1st pattern.
      Note that the continue text is in German !
    - 3 letters when you enter your initials
    - I can't tell if it's an ingame bug or not, but there's a mix
      between "COIN" and "CREDIT" ("COCR" is displayed)
  
  2b) 'fantasyu'
  
    - Code for coinage is the same as for 'vanguard'.
    - This version seems easier than 'fantasy', especially on level 2
      where you have a sword and an easier maze.
    - Code has been added to test DSW bit 7 to allow or not a continue play.
      Note that the continue play is only available on the 1st pattern.
    - 3 letters when you enter your initials
    - "Fantasy" is written with different "font" and color
    - "CREDIT" is displayed instead of "COIN"
  
  2b) 'fantasyj'
  
    - Code for coinage is the same as for 'vanguard'.
    - This version seems easier than 'fantasy', especially on level 2
      where you have a sword and an easier maze.
    - Code has been added to test DSW bit 7 to allow or not a continue play.
      Note that the continue play is only available on the 1st pattern.
      Also note that the continue text is still in English !
    - 3 letters when you enter your initials
    - "COIN" is correctly displayed.
  
  3)  'pballoon'
  
    - Code for coinage is the same as for 'vanguard'.
    - The "Language" Dip Switch only has an effect at the end of the pattern
      when it displays "LAND HERE" or what I suppose to be same in Japanese.
    - 3 letters when you enter your initials
    - "CREDIT" is displayed
  
  4a) 'nibbler'
  
    - "Lives settings" : 3, 4, 5 or 6 (table at 0x4edf)
    - Bonus life every 4 levels
    - Simplified instructions
    - DSW bit 2 determines what happens when the snake touches a corner (code at 0x3c91) :
        * bit 2 = 0 : pause for 13 frames
        * bit 2 = 1 : no pause
  
  4b) 'nibblera'
  
    - "Lives settings" : 3, 4, 5 or 6 (table at 0x5bf0)
    - Bonus life every 4 levels
    - Detailed instructions
    - DSW bit 2 is no more tested when the snake touches a corner (code at 0x3b3c);
      this means that the snake ALWAYS pauses for 13 frames.
      However, there is extra code where it is tested to determine difficulty
      (code at 0x31b4 and 0x32f5 - tables at 0x3391 and 0x33b2)
  
  4c) 'nibblerb'
  
    - code based on 'nibblera'
    - "Lives settings" : 2, 3, 4 or 5 (table at 0x5be7)
    - Bonus life every 4 levels
    - Detailed instructions
    - The snake ALWAYS pauses for 13 frames (code at 0x3b38) when it touches a corner
      and DSW bit 2 determines difficulty as in 'nibblera'
      (code at 0x31b0 and 0x32f1 - tables at 0x338d and 0x33ae)
  
  4d) 'nibblero'
  
    - code is the same as 'nibblerb' (same routines, same code and tables addresses)
    - "Lives settings" : 2, 3, 4 or 5 (table at 0x5be7)
    - Bonus life every 8 levels
    - Detailed instructions
    - The snake ALWAYS pauses for 13 frames (code at 0x3b38) when it touches a corner
      and DSW bit 2 determines difficulty as in 'nibblera'
      (code at 0x31b0 and 0x32f1 - tables at 0x338d and 0x33ae)
    - The game is harder than 'nibblerb' because the tables at 0x338d and 0x33ae
      have higher values; so the snake goes faster and grows longer.
  
  ***************************************************************************/
  
  /*
  
      TODO:
  
      - sasuke/satansat/vanguard discrete sound
      - vanguard/fantasy speech (hd38880/hd38882 emulation)
      - music freq (Satan of Saturn and clone)
      - correct music waveform/volume control
      - correct ROM names
      - fantasy is German? (the continue text is in German)
  
  */
  
  #include "emu.h"
  #include "deprecat.h"
  #include "cpu/m6502/m6502.h"
  #include "video/mc6845.h"
  #include "sound/sn76477.h"
  #include "sound/samples.h"
  #include "includes/snk6502.h"
  
  
  #define MASTER_CLOCK	XTAL_11_289MHz
  
  /* Change to 1 to allow fake debug buttons */
  #define NIBBLER_HACK	0
  
  
  #ifndef M_LN2
  #define M_LN2		0.69314718055994530942
  #endif
  
  
  /* binary counter (1.4MHz update) */
  static UINT8 sasuke_counter;
  
  static TIMER_DEVICE_CALLBACK( sasuke_update_counter )
  {
  	sasuke_counter += 0x10;
  }
  
  static void sasuke_start_counter(running_machine *machine)
  {
  	sasuke_counter = 0;
  }
  
  
  /*************************************
   *
   *  Custom input ports
   *
   *************************************/
  
  static CUSTOM_INPUT( snk6502_music0_r )
  {
  	return (snk6502_music0_playing() ? 0x01 : 0x00);
  }
  
  static CUSTOM_INPUT( sasuke_count_r )
  {
  	return (sasuke_counter >> 4);
  }
  
  
  /*************************************
   *
   *  Memory maps
   *
   *************************************/
  
  static ADDRESS_MAP_START( sasuke_map, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x03ff) AM_RAM
  	AM_RANGE(0x0400, 0x07ff) AM_RAM_WRITE(snk6502_videoram2_w) AM_BASE(&snk6502_videoram2)
  	AM_RANGE(0x0800, 0x0bff) AM_RAM_WRITE(snk6502_videoram_w) AM_BASE(&snk6502_videoram)
  	AM_RANGE(0x0c00, 0x0fff) AM_RAM_WRITE(snk6502_colorram_w) AM_BASE(&snk6502_colorram)
  	AM_RANGE(0x1000, 0x1fff) AM_RAM_WRITE(snk6502_charram_w) AM_BASE(&snk6502_charram)
  	AM_RANGE(0x3000, 0x3000) AM_DEVWRITE("crtc", mc6845_address_w)
  	AM_RANGE(0x3001, 0x3001) AM_DEVWRITE("crtc", mc6845_register_w)
  	AM_RANGE(0x4000, 0x8fff) AM_ROM
  	AM_RANGE(0xb000, 0xb001) AM_WRITE(sasuke_sound_w)
  	AM_RANGE(0xb002, 0xb002) AM_WRITE(satansat_b002_w)	/* flip screen & irq enable */
  	AM_RANGE(0xb003, 0xb003) AM_WRITE(satansat_backcolor_w)
  	AM_RANGE(0xb004, 0xb004) AM_READ_PORT("IN0")
  	AM_RANGE(0xb005, 0xb005) AM_READ_PORT("IN1")
  	AM_RANGE(0xb006, 0xb006) AM_READ_PORT("DSW")
  	AM_RANGE(0xb007, 0xb007) AM_READ_PORT("IN2")
  	AM_RANGE(0xf800, 0xffff) AM_ROM
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( satansat_map, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x03ff) AM_RAM
  	AM_RANGE(0x0400, 0x07ff) AM_RAM_WRITE(snk6502_videoram2_w) AM_BASE(&snk6502_videoram2)
  	AM_RANGE(0x0800, 0x0bff) AM_RAM_WRITE(snk6502_videoram_w) AM_BASE(&snk6502_videoram)
  	AM_RANGE(0x0c00, 0x0fff) AM_RAM_WRITE(snk6502_colorram_w) AM_BASE(&snk6502_colorram)
  	AM_RANGE(0x1000, 0x1fff) AM_RAM_WRITE(snk6502_charram_w) AM_BASE(&snk6502_charram)
  	AM_RANGE(0x3000, 0x3000) AM_DEVWRITE("crtc", mc6845_address_w)
  	AM_RANGE(0x3001, 0x3001) AM_DEVWRITE("crtc", mc6845_register_w)
  	AM_RANGE(0x4000, 0x97ff) AM_ROM
  	AM_RANGE(0xb000, 0xb001) AM_WRITE(satansat_sound_w)
  	AM_RANGE(0xb002, 0xb002) AM_WRITE(satansat_b002_w)	/* flip screen & irq enable */
  	AM_RANGE(0xb003, 0xb003) AM_WRITE(satansat_backcolor_w)
  	AM_RANGE(0xb004, 0xb004) AM_READ_PORT("IN0")
  	AM_RANGE(0xb005, 0xb005) AM_READ_PORT("IN1")
  	AM_RANGE(0xb006, 0xb006) AM_READ_PORT("DSW")
  	AM_RANGE(0xb007, 0xb007) AM_READ_PORT("IN2")
  	AM_RANGE(0xf800, 0xffff) AM_ROM
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( vanguard_map, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x03ff) AM_RAM
  	AM_RANGE(0x0400, 0x07ff) AM_RAM_WRITE(snk6502_videoram2_w) AM_BASE(&snk6502_videoram2)
  	AM_RANGE(0x0800, 0x0bff) AM_RAM_WRITE(snk6502_videoram_w) AM_BASE(&snk6502_videoram)
  	AM_RANGE(0x0c00, 0x0fff) AM_RAM_WRITE(snk6502_colorram_w) AM_BASE(&snk6502_colorram)
  	AM_RANGE(0x1000, 0x1fff) AM_RAM_WRITE(snk6502_charram_w) AM_BASE(&snk6502_charram)
  	AM_RANGE(0x3000, 0x3000) AM_DEVWRITE("crtc", mc6845_address_w)
  	AM_RANGE(0x3001, 0x3001) AM_DEVWRITE("crtc", mc6845_register_w)
  	AM_RANGE(0x3100, 0x3102) AM_WRITE(vanguard_sound_w)
  	AM_RANGE(0x3103, 0x3103) AM_WRITE(snk6502_flipscreen_w)
  	AM_RANGE(0x3104, 0x3104) AM_READ_PORT("IN0")
  	AM_RANGE(0x3105, 0x3105) AM_READ_PORT("IN1")
  	AM_RANGE(0x3106, 0x3106) AM_READ_PORT("DSW")
  	AM_RANGE(0x3107, 0x3107) AM_READ_PORT("IN2")
  	AM_RANGE(0x3200, 0x3200) AM_WRITE(snk6502_scrollx_w)
  	AM_RANGE(0x3300, 0x3300) AM_WRITE(snk6502_scrolly_w)
  	AM_RANGE(0x3400, 0x3400) AM_WRITE(vanguard_speech_w)	// speech
  	AM_RANGE(0x4000, 0xbfff) AM_ROM
  	AM_RANGE(0xf000, 0xffff) AM_ROM	/* for the reset / interrupt vectors */
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( fantasy_map, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x03ff) AM_RAM
  	AM_RANGE(0x0400, 0x07ff) AM_RAM_WRITE(snk6502_videoram2_w) AM_BASE(&snk6502_videoram2)
  	AM_RANGE(0x0800, 0x0bff) AM_RAM_WRITE(snk6502_videoram_w) AM_BASE(&snk6502_videoram)
  	AM_RANGE(0x0c00, 0x0fff) AM_RAM_WRITE(snk6502_colorram_w) AM_BASE(&snk6502_colorram)
  	AM_RANGE(0x1000, 0x1fff) AM_RAM_WRITE(snk6502_charram_w) AM_BASE(&snk6502_charram)
  	AM_RANGE(0x2000, 0x2000) AM_DEVWRITE("crtc", mc6845_address_w)
  	AM_RANGE(0x2001, 0x2001) AM_DEVWRITE("crtc", mc6845_register_w)
  	AM_RANGE(0x2100, 0x2103) AM_WRITE(fantasy_sound_w)
  	AM_RANGE(0x2104, 0x2104) AM_READ_PORT("IN0")
  	AM_RANGE(0x2105, 0x2105) AM_READ_PORT("IN1")
  	AM_RANGE(0x2106, 0x2106) AM_READ_PORT("DSW")
  	AM_RANGE(0x2107, 0x2107) AM_READ_PORT("IN2")
  	AM_RANGE(0x2200, 0x2200) AM_WRITE(snk6502_scrollx_w)
  	AM_RANGE(0x2300, 0x2300) AM_WRITE(snk6502_scrolly_w)
  	AM_RANGE(0x2400, 0x2400) AM_WRITE(fantasy_speech_w)	// speech
  	AM_RANGE(0x3000, 0xbfff) AM_ROM
  	AM_RANGE(0xf000, 0xffff) AM_ROM
  ADDRESS_MAP_END
  
  static ADDRESS_MAP_START( pballoon_map, ADDRESS_SPACE_PROGRAM, 8 )
  	AM_RANGE(0x0000, 0x03ff) AM_RAM
  	AM_RANGE(0x0400, 0x07ff) AM_RAM_WRITE(snk6502_videoram2_w) AM_BASE(&snk6502_videoram2)
  	AM_RANGE(0x0800, 0x0bff) AM_RAM_WRITE(snk6502_videoram_w) AM_BASE(&snk6502_videoram)
  	AM_RANGE(0x0c00, 0x0fff) AM_RAM_WRITE(snk6502_colorram_w) AM_BASE(&snk6502_colorram)
  	AM_RANGE(0x1000, 0x1fff) AM_RAM_WRITE(snk6502_charram_w) AM_BASE(&snk6502_charram)
  	AM_RANGE(0x3000, 0x9fff) AM_ROM
  	AM_RANGE(0xb000, 0xb000) AM_DEVWRITE("crtc", mc6845_address_w)
  	AM_RANGE(0xb001, 0xb001) AM_DEVWRITE("crtc", mc6845_register_w)
  	AM_RANGE(0xb100, 0xb103) AM_WRITE(fantasy_sound_w)
  	AM_RANGE(0xb104, 0xb104) AM_READ_PORT("IN0")
  	AM_RANGE(0xb105, 0xb105) AM_READ_PORT("IN1")
  	AM_RANGE(0xb106, 0xb106) AM_READ_PORT("DSW")
  	AM_RANGE(0xb107, 0xb107) AM_READ_PORT("IN2")
  	AM_RANGE(0xb200, 0xb200) AM_WRITE(snk6502_scrollx_w)
  	AM_RANGE(0xb300, 0xb300) AM_WRITE(snk6502_scrolly_w)
  	AM_RANGE(0xf000, 0xffff) AM_ROM
  ADDRESS_MAP_END
  
  
  /*************************************
   *
   *  Port definitions
   *
   *************************************/
  
  static INPUT_PORTS_START( snk6502_generic_joy8way )
  	PORT_START("IN0")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN) PORT_8WAY
  	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP) PORT_8WAY
  	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY
  	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY
  
  	PORT_START("IN1")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
  	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
  	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
  	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
  
  	PORT_START("IN2")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_IMPULSE(1)
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_IMPULSE(1)
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_START2 )
  	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_START1 )
  
  	PORT_START("DSW")
  	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:!1")
  	PORT_DIPSETTING(    0x01, DEF_STR( Upright ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
  	PORT_DIPNAME( 0x0e, 0x02, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW1:!2,!3,!4")
  	PORT_DIPSETTING (   0x02, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING (   0x00, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING (   0x08, DEF_STR( 1C_2C ) )
  	PORT_DIPSETTING (   0x04, DEF_STR( 1C_3C ) )
  	PORT_DIPSETTING (   0x0c, DEF_STR( 1C_6C ) )
  /*  PORT_DIPSETTING (   0x06, DEF_STR( 1C_1C ) ) */
  /*  PORT_DIPSETTING (   0x0a, DEF_STR( 1C_1C ) ) */
  /*  PORT_DIPSETTING (   0x0e, DEF_STR( 1C_1C ) ) */
  	PORT_DIPNAME( 0x30, 0x00, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW1:!5,!6")
  	PORT_DIPSETTING(    0x00, "3" )
  	PORT_DIPSETTING(    0x10, "4" )
  	PORT_DIPSETTING(    0x20, "5" )
  /*  PORT_DIPSETTING(    0x30, "3" ) */
  	PORT_DIPNAME( 0x40, 0x00, "Coinage Bonus" ) PORT_DIPLOCATION("SW1:!7")      /* see notes */
  	PORT_DIPSETTING (   0x40, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING (   0x00, DEF_STR( 1C_1C ) )
  	PORT_DIPUNUSED_DIPLOC( 0x80, IP_ACTIVE_HIGH, "SW1:!8" )
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( satansat )
  	PORT_START("IN0")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_BUTTON1 )
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_COCKTAIL
  	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_COCKTAIL
  	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_COCKTAIL
  	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_BUTTON2 )
  	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_COCKTAIL
  
  	PORT_START("IN1")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_START1 )
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START2 )
  	PORT_BIT( 0x7c, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(snk6502_music0_r, NULL)     /* music0 playing */
  
  	PORT_START("IN2")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_IMPULSE(1)
  	PORT_BIT( 0x0e, IP_ACTIVE_HIGH, IPT_UNKNOWN )                                         /* NC */
  	PORT_BIT( 0xf0, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(sasuke_count_r, NULL)       /* connected to a binary counter */
  
  	PORT_START("DSW")
  	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:!1")
  	PORT_DIPSETTING(    0x01, DEF_STR( Upright ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
  	PORT_DIPNAME( 0x0a, 0x00, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW1:!2,!4")
  	PORT_DIPSETTING (   0x08, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING (   0x00, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING (   0x02, DEF_STR( 1C_2C ) )
  /*  PORT_DIPSETTING (   0x0a, DEF_STR( 2C_1C ) ) */
  	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SW1:!3")
  	PORT_DIPSETTING (   0x04, "5000" )
  	PORT_DIPSETTING (   0x00, "10000" )
  	PORT_DIPNAME( 0x30, 0x10, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW1:!5,!6") /* manual says 4 is the default value */
  	PORT_DIPSETTING (   0x00, "3" )
  	PORT_DIPSETTING (   0x10, "4" )
  	PORT_DIPSETTING (   0x20, "5" )
  /*  PORT_DIPSETTING(    0x30, "3" ) */
  	PORT_DIPUNUSED_DIPLOC( 0x40, IP_ACTIVE_HIGH, "SW1:!7" )
  	PORT_DIPNAME( 0x80, 0x00, "RAM Test" ) PORT_DIPLOCATION("SW1:!8") /* unused according to manual */
  	PORT_DIPSETTING (   0x00, DEF_STR( Off ) )
  	PORT_DIPSETTING (   0x80, DEF_STR( On ) )
  INPUT_PORTS_END
  
  /* Derived from 'satansat'. Might not reflect the actual hardware. Dip Swicthes verified from game code though. */
  static INPUT_PORTS_START( sasuke )
  	PORT_INCLUDE(satansat)
  
  	PORT_MODIFY("IN0")
  	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_START1 )
  	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_START2 )
  
  	PORT_MODIFY("IN1")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_UNKNOWN )
  
  	PORT_MODIFY("DSW")
  	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW1:!2")
  	PORT_DIPSETTING (   0x00, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING (   0x02, DEF_STR( 1C_2C ) )
  	PORT_DIPUNUSED_DIPLOC( 0x08, IP_ACTIVE_HIGH, "SW1:!4" )
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( vanguard )
  	PORT_INCLUDE(snk6502_generic_joy8way)
  
  	PORT_MODIFY("IN0")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON3 )                /* fire down */
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON4 )                /* fire up */
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_BUTTON2 )                /* fire right */
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON1 )                /* fire left */
  
  	PORT_MODIFY("IN1")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON3 ) PORT_COCKTAIL  /* fire down */
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_COCKTAIL  /* fire up */
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_COCKTAIL  /* fire right */
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_COCKTAIL  /* fire left */
  
  	PORT_MODIFY("IN2")
  	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(snk6502_music0_r, NULL)     /* music0 playing */
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( fantasy )
  	PORT_INCLUDE(snk6502_generic_joy8way)
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( fantasyu )
  	PORT_INCLUDE(fantasy)
  
  	PORT_MODIFY("DSW")
  	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Allow_Continue ) ) PORT_DIPLOCATION("SW1:!8")
  	PORT_DIPSETTING(    0x80, DEF_STR( No ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Yes ) )              /* 1st pattern only */
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( pballoon )
  	PORT_INCLUDE(snk6502_generic_joy8way)
  
  	PORT_MODIFY("IN0")
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON1 )
  
  	PORT_MODIFY("IN1")
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_COCKTAIL
  
  	PORT_MODIFY("DSW")
  	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Language ) ) PORT_DIPLOCATION("SW1:!8")  /* code at 0x6c83 */
  	PORT_DIPSETTING(    0x80, DEF_STR( English ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( Japanese ) )
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( nibbler )
  	PORT_INCLUDE(snk6502_generic_joy8way)
  
  	/* There are no buttons on a real "Nibbler" cabinet, but I guess that the game was tested
         with a "Vanguard" cabinet so they have been mapped with debug features. */
  #if NIBBLER_HACK
  	PORT_MODIFY("IN0")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 0") PORT_CODE(KEYCODE_Z) // slow down
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 1") PORT_CODE(KEYCODE_X)
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 2") PORT_CODE(KEYCODE_C)
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 3") PORT_CODE(KEYCODE_V)
  
  	PORT_MODIFY("IN1")
  	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 4") PORT_CODE(KEYCODE_B) // pause
  	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 5") PORT_CODE(KEYCODE_N) // unpause
  	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 6") PORT_CODE(KEYCODE_M) // end game
  	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_SERVICE ) PORT_NAME("Debug 7") PORT_CODE(KEYCODE_K)
  #endif
  
  	PORT_MODIFY("DSW")
  	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( 0x04, 0x00, "Pause at Corners" ) PORT_DIPLOCATION("SW1:!3")
  	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
  	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:!4")
  	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
  	PORT_DIPSETTING(    0x08, DEF_STR( Cocktail ) )
  	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Service_Mode ) ) PORT_DIPLOCATION("SW1:!5")
  	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
  	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Free_Play ) ) PORT_DIPLOCATION("SW1:!6")
  	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
  	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
  	PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW1:!7,!8")
  	PORT_DIPSETTING(    0x40, DEF_STR( 2C_1C ) )
  	PORT_DIPSETTING(    0xc0, "2 Coins/1 Credit 4/3" )
  	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
  	PORT_DIPSETTING(    0x80, "1 Coin/1 Credit 2/3" )
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( nibblera )
  	PORT_INCLUDE(nibbler)
  
  	PORT_MODIFY("DSW")
  	PORT_DIPNAME( 0x04, 0x00, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:!3")
  	PORT_DIPSETTING(    0x00, DEF_STR( Easy ) )
  	PORT_DIPSETTING(    0x04, DEF_STR( Hard ) )
  INPUT_PORTS_END
  
  static INPUT_PORTS_START( nibblerb )
  	PORT_INCLUDE(nibblera)
  
  	PORT_MODIFY("DSW")
  	PORT_DIPNAME( 0x03, 0x00, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW1:!1,!2")
  	PORT_DIPSETTING(    0x00, "2" )
  	PORT_DIPSETTING(    0x01, "3" )
  	PORT_DIPSETTING(    0x02, "4" )
  	PORT_DIPSETTING(    0x03, "5" )
  INPUT_PORTS_END
  
  
  /*************************************
   *
   *  Graphics layouts
   *
   *************************************/
  
  static const gfx_layout swapcharlayout =
  {
  	8,8,    /* 8*8 characters */
  	256,	/* 256 characters */
  	2,      /* 2 bits per pixel */
  	{ 256*8*8, 0 }, /* the two bitplanes are separated */
  	{ 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 =
  {
  	8,8,    /* 8*8 characters */
  	RGN_FRAC(1,2),
  	2,      /* 2 bits per pixel */
  	{ 0, RGN_FRAC(1,2) }, /* the two bitplanes are separated */
  	{ 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_memory =
  {
  	8,8,    /* 8*8 characters */
  	256,	/* 256 characters */
  	2,      /* 2 bits per pixel */
  	{ 0, 256*8*8 }, /* the two bitplanes are separated */
  	{ 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 GFXDECODE_START( sasuke )
  	GFXDECODE_ENTRY( NULL,           0x1000, swapcharlayout,      0, 4 )	/* the game dynamically modifies this */
  	GFXDECODE_ENTRY( "gfx1", 0x0000, swapcharlayout,    4*4, 4 )
  GFXDECODE_END
  
  static GFXDECODE_START( satansat )
  	GFXDECODE_ENTRY( NULL,           0x1000, charlayout_memory,   0, 4 )	/* the game dynamically modifies this */
  	GFXDECODE_ENTRY( "gfx1", 0x0000, charlayout,        4*4, 4 )
  GFXDECODE_END
  
  static GFXDECODE_START( vanguard )
  	GFXDECODE_ENTRY( NULL,           0x1000, charlayout_memory,   0, 8 )	/* the game dynamically modifies this */
  	GFXDECODE_ENTRY( "gfx1", 0x0000, charlayout,        8*4, 8 )
  GFXDECODE_END
  
  
  /*************************************
   *
   *  Interrupt Generators
   *
   *************************************/
  
  static INTERRUPT_GEN( satansat_interrupt )
  {
  	if (cpu_getiloops(device) != 0)
  	{
  		UINT8 val = input_port_read(device->machine, "IN2");
  
  		coin_counter_w(device->machine, 0, val & 1);
  
  		/* user asks to insert coin: generate a NMI interrupt. */
  		if (val & 0x01)
  			cpu_set_input_line(device, INPUT_LINE_NMI, PULSE_LINE);
  	}
  	else
  		cpu_set_input_line(device, M6502_IRQ_LINE, HOLD_LINE);	/* one IRQ per frame */
  }
  
  static INTERRUPT_GEN( snk6502_interrupt )
  {
  	if (cpu_getiloops(device) != 0)
  	{
  		UINT8 val = input_port_read(device->machine, "IN2");
  
  		coin_counter_w(device->machine, 0, val & 1);
  		coin_counter_w(device->machine, 1, val & 2);
  
  		/* user asks to insert coin: generate a NMI interrupt. */
  		if (val & 0x03)
  			cpu_set_input_line(device, INPUT_LINE_NMI, PULSE_LINE);
  	}
  	else
  		cpu_set_input_line(device, M6502_IRQ_LINE, HOLD_LINE);	/* one IRQ per frame */
  }
  
  
  /*************************************
   *
   *  6845 CRTC interface
   *
   *************************************/
  
  static const mc6845_interface mc6845_intf =
  {
  	"screen",	/* screen we are acting on */
  	8,			/* number of pixels per video memory address */
  	NULL,		/* before pixel update callback */
  	NULL,		/* row update callback */
  	NULL,		/* after pixel update callback */
  	DEVCB_NULL,	/* callback for display state changes */
  	DEVCB_NULL,	/* callback for cursor state changes */
  	DEVCB_NULL,	/* HSYNC callback */
  	DEVCB_NULL,	/* VSYNC callback */
  	NULL		/* update address callback */
  };
  
  
  /*************************************
   *
   *  Machine initialisation
   *
   *************************************/
  
  static MACHINE_RESET( sasuke )
  {
  	//snk6502_set_music_clock(M_LN2 * (RES_K(1) + RES_K(10) * 2) * CAP_U(1));
  	// adjusted
  	snk6502_set_music_clock(1 / 72.1);
  
  	// adjusted
  	snk6502_set_music_freq(38000);
  
  	sasuke_start_counter(machine);
  }
  
  static MACHINE_RESET( satansat )
  {
  	// same as sasuke
  	snk6502_set_music_freq(38000);
  
  	sasuke_start_counter(machine);
  }
  
  static MACHINE_RESET( vanguard )
  {
  	// 41.6 Hz update (measured)
  	snk6502_set_music_clock(1 / 41.6);
  }
  
  static MACHINE_RESET( pballoon )
  {
  	// 40.3 Hz update (measured)
  	snk6502_set_music_clock(1 / 40.3);
  }
  
  
  /*************************************
   *
   *  Machine drivers
   *
   *************************************/
  
  static MACHINE_DRIVER_START( sasuke )
  	// basic machine hardware
  	MDRV_CPU_ADD("maincpu", M6502, MASTER_CLOCK / 16) // 700 kHz
  	MDRV_CPU_PROGRAM_MAP(sasuke_map)
  	MDRV_CPU_VBLANK_INT_HACK(satansat_interrupt, 2)
  
  	MDRV_MACHINE_RESET(sasuke)
  
  	// video hardware
  
  	MDRV_SCREEN_ADD("screen", RASTER)
  	MDRV_SCREEN_REFRESH_RATE((MASTER_CLOCK / 16) / (45 * 32 * 8))
  	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
  	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
  	MDRV_SCREEN_SIZE(32*8, 32*8)
  	MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 28*8-1)
  
  	MDRV_GFXDECODE(sasuke)
  	MDRV_PALETTE_LENGTH(32)
  
  	MDRV_PALETTE_INIT(satansat)
  	MDRV_VIDEO_START(satansat)
  	MDRV_VIDEO_UPDATE(snk6502)
  
  	MDRV_MC6845_ADD("crtc", MC6845, MASTER_CLOCK / 16, mc6845_intf)
  
  	MDRV_TIMER_ADD_PERIODIC("sasuke_timer", sasuke_update_counter, HZ(MASTER_CLOCK / 8))	// 1.4 MHz
  
  	// sound hardware
  	MDRV_SPEAKER_STANDARD_MONO("mono")
  
  	MDRV_SOUND_ADD("snk6502", SNK6502, 0)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
  
  	MDRV_SOUND_ADD("samples", SAMPLES, 0)
  	MDRV_SOUND_CONFIG(sasuke_samples_interface)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.12)
  
  	MDRV_SOUND_ADD("sn76477.1", SN76477, 0)
  	MDRV_SOUND_CONFIG(sasuke_sn76477_intf_1)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
  
  	MDRV_SOUND_ADD("sn76477.2", SN76477, 0)
  	MDRV_SOUND_CONFIG(sasuke_sn76477_intf_2)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
  
  	MDRV_SOUND_ADD("sn76477.3", SN76477, 0)
  	MDRV_SOUND_CONFIG(sasuke_sn76477_intf_3)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( satansat )
  	// basic machine hardware
  	MDRV_IMPORT_FROM(sasuke)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(satansat_map)
  
  	MDRV_MACHINE_RESET(satansat)
  
  	// video hardware
  	MDRV_GFXDECODE(satansat)
  
  	// sound hardware
  	MDRV_SOUND_REPLACE("samples", SAMPLES, 0)
  	MDRV_SOUND_CONFIG(vanguard_samples_interface)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
  
  	MDRV_SOUND_REPLACE("sn76477.1", SN76477, 0)
  	MDRV_SOUND_CONFIG(satansat_sn76477_intf)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
  
  	MDRV_DEVICE_REMOVE("sn76477.2")
  	MDRV_DEVICE_REMOVE("sn76477.3")
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( vanguard )
  	// basic machine hardware
  	//MDRV_CPU_ADD("maincpu", M6502, MASTER_CLOCK / 8)   // 1.4 MHz
  	MDRV_CPU_ADD("maincpu", M6502, 930000)		// adjusted
  	MDRV_CPU_PROGRAM_MAP(vanguard_map)
  	MDRV_CPU_VBLANK_INT_HACK(snk6502_interrupt, 2)
  
  	MDRV_MACHINE_RESET(vanguard)
  
  	// video hardware
  
  	MDRV_SCREEN_ADD("screen", RASTER)
  	MDRV_SCREEN_REFRESH_RATE((MASTER_CLOCK / 16) / (45 * 32 * 8))
  	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
  	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
  	MDRV_SCREEN_SIZE(32*8, 32*8)
  	MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 28*8-1)
  
  	MDRV_GFXDECODE(vanguard)
  	MDRV_PALETTE_LENGTH(64)
  
  	MDRV_PALETTE_INIT(snk6502)
  	MDRV_VIDEO_START(snk6502)
  	MDRV_VIDEO_UPDATE(snk6502)
  
  	MDRV_MC6845_ADD("crtc", MC6845, MASTER_CLOCK / 16, mc6845_intf)
  
  	// sound hardware
  	MDRV_SPEAKER_STANDARD_MONO("mono")
  
  	MDRV_SOUND_ADD("snk6502", SNK6502, 0)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
  
  	MDRV_SOUND_ADD("samples", SAMPLES, 0)
  	MDRV_SOUND_CONFIG(vanguard_samples_interface)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
  
  	MDRV_SOUND_ADD("sn76477.1", SN76477, 0)
  	MDRV_SOUND_CONFIG(vanguard_sn76477_intf_1)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
  
  	MDRV_SOUND_ADD("sn76477.2", SN76477, 0)
  	MDRV_SOUND_CONFIG(vanguard_sn76477_intf_2)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( fantasy )
  	// basic machine hardware
  	MDRV_IMPORT_FROM(vanguard)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(fantasy_map)
  
  	// sound hardware
  	MDRV_SOUND_REPLACE("samples", SAMPLES, 0)
  	MDRV_SOUND_CONFIG(fantasy_samples_interface)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.5)
  
  	MDRV_SOUND_REPLACE("sn76477.1", SN76477, 0)
  	MDRV_SOUND_CONFIG(fantasy_sn76477_intf)
  	MDRV_SOUND_ROUTE_EX(0, "discrete", 1.0, 0)
  
  	MDRV_SOUND_ADD("discrete", DISCRETE, 0)
  	MDRV_SOUND_CONFIG_DISCRETE(fantasy)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.5)
  
  	MDRV_DEVICE_REMOVE("sn76477.2")
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( nibbler )
  	// basic machine hardware
  	MDRV_IMPORT_FROM(fantasy)
  
  	// sound hardware
  	MDRV_DEVICE_REMOVE("samples")
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( pballoon )
  	// basic machine hardware
  	MDRV_IMPORT_FROM(nibbler)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(pballoon_map)
  
  	MDRV_MACHINE_RESET(pballoon)
  
  	// video hardware
  	MDRV_SCREEN_MODIFY("screen")
  	MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
  MACHINE_DRIVER_END
  
  
  /*************************************
   *
   *  ROM definitions
   *
   *************************************/
  
  ROM_START( sasuke )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "sc1",          0x4000, 0x0800, CRC(34cbbe03) SHA1(3d643e11370e61dde0c42c7761a856c5cf53d621) )
  	ROM_LOAD( "sc2",          0x4800, 0x0800, CRC(38cc14f0) SHA1(d60df67f2a32c131e8957e225b79618d6262463d) )
  	ROM_LOAD( "sc3",          0x5000, 0x0800, CRC(54c41285) SHA1(5618c2ac745bbde96bfda7f01f7aee7e2b643d7e) )
  	ROM_LOAD( "sc4",          0x5800, 0x0800, CRC(23edafcf) SHA1(bda3bcb506f6e23f422aafd7ca9b95bfb4d1d8e1) )
  	ROM_LOAD( "sc5",          0x6000, 0x0800, CRC(ca410e4f) SHA1(0d09422d01b4359853c173a4cb18c9b5fbc7fe7c) )
  	ROM_LOAD( "sc6",          0x6800, 0x0800, CRC(80406afb) SHA1(2c4a34a7450fa7258c5e6ead9b1fd6c6b973f081) )
  	ROM_LOAD( "sc7",          0x7000, 0x0800, CRC(04d0f104) SHA1(73ed501f70d2a9e8994f8392f617450eafef39b3) )
  	ROM_LOAD( "sc8",          0x7800, 0x0800, CRC(0219104b) SHA1(fd5c43304d59bc34e9ae6ef7576d75cf319d823e) )
  	ROM_RELOAD(               0xf800, 0x0800 ) /* for the reset/interrupt vectors */
  	ROM_LOAD( "sc9",          0x8000, 0x0800, CRC(d6ff889a) SHA1(1eea0366205dd0d9bffb5d093f259edc1d51cbe0) )
  	ROM_LOAD( "sc10",         0x8800, 0x0800, CRC(19df6b9a) SHA1(95e904251c39dcef227a4c125fc573e958ee78b7) )
  
  	ROM_REGION( 0x1000, "gfx1", 0 )
  	ROM_LOAD( "mcs_c",        0x0000, 0x0800, CRC(aff9743d) SHA1(a968a193ca551d92f79e09d1761dd2ccebc76eee) )
  	ROM_LOAD( "mcs_d",        0x0800, 0x0800, CRC(9c805120) SHA1(74b83daa3ce3c9f7d96ad872b9134edd6f1bcb8a) )
  
  	ROM_REGION( 0x0020, "proms", 0 )
  	ROM_LOAD( "sasuke.clr",   0x0000, 0x0020, CRC(b70f34c1) SHA1(890cfbb25e14112713ba7900b9cd56554a8bc1ec) )
  
  	ROM_REGION( 0x1000, "snk6502", 0 )  /* sound data for Vanguard-style audio section */
  	ROM_LOAD( "sc11",         0x0000, 0x0800, CRC(24a0e121) SHA1(e3cde355309de6678026d595955297258f069946) )
  ROM_END
  
  ROM_START( satansat )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "ss1",          0x4000, 0x0800, CRC(549dd13a) SHA1(06b55d0b1da84bef30857faa398aabfd04365eb6) )
  	ROM_LOAD( "ss2",          0x4800, 0x0800, CRC(04972fa8) SHA1(89833a7c893168acd5599ca7ad4b33a8f3df40c5) )
  	ROM_LOAD( "ss3",          0x5000, 0x0800, CRC(9caf9057) SHA1(26d439678e5e4d375ffac60126f45de599575bfd) )
  	ROM_LOAD( "ss4",          0x5800, 0x0800, CRC(e1bdcfe1) SHA1(c99457c18fae8de79bbbe6bc0471fdc83f1e9b19) )
  	ROM_LOAD( "ss5",          0x6000, 0x0800, CRC(d454de19) SHA1(ae8abb8a9d999d11ba6ad341bf635ae822d5746f) )
  	ROM_LOAD( "ss6",          0x6800, 0x0800, CRC(7fbd5d30) SHA1(be0554ade440bf255131466ee8bd2905d3f446a8) )
  	ROM_LOAD( "zarz128.15",   0x7000, 0x0800, CRC(93ea2df9) SHA1(4f7d076deef1e14b568b06974194861d3789ab5c) )
  	ROM_LOAD( "zarz129.16",   0x7800, 0x0800, CRC(e67ec873) SHA1(14158914f07cabe61abc400c371d742ceb61d165) )
  	ROM_RELOAD(               0xf800, 0x0800 ) /* for the reset/interrupt vectors */
  	ROM_LOAD( "zarz130.22",   0x8000, 0x0800, CRC(22c44650) SHA1(063915cde86aece8860db1df15497cde669e73bd) )
  	ROM_LOAD( "ss10",         0x8800, 0x0800, CRC(8f1b313a) SHA1(0c7832505a1287533d9b2d7f2d54000b3b44e40d) )
  	ROM_LOAD( "ss11",         0x9000, 0x0800, CRC(e74f98e0) SHA1(89a93de6105195e0e5d255bfa240538ded155fb9) )
  
  	ROM_REGION( 0x1000, "gfx1", 0 )
  	ROM_LOAD( "zarz135.73",   0x0000, 0x0800, CRC(e837c62b) SHA1(97552b1e413a3934f4dc5a6fc9fc1fa8ba7a2e7e) )
  	ROM_LOAD( "zarz136.75",   0x0800, 0x0800, CRC(83f61623) SHA1(4cb28f85f32d13bfa364c376ea3e30fd451b5884) )
  
  	ROM_REGION( 0x0020, "proms", 0 )
  	ROM_LOAD( "zarz138.03",   0x0000, 0x0020, CRC(5dd6933a) SHA1(417d827d9e47b6db01fecc2164e5ef332d4cd70e) )
  
  	ROM_REGION( 0x1000, "snk6502", 0 )  /* sound data for Vanguard-style audio section */
  	ROM_LOAD( "ss12",         0x0000, 0x0800, CRC(dee01f24) SHA1(92c8545226a31412239dad4aa2715b51264ad22e) )
  	ROM_LOAD( "zarz134.54",   0x0800, 0x0800, CRC(580934d2) SHA1(c1c7eba56bca2a0ea6a68c0245b071a3308f92bd) )
  ROM_END
  
  ROM_START( satansata )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "ic7.bin",   0x4000, 0x0800, CRC(549dd13a) SHA1(06b55d0b1da84bef30857faa398aabfd04365eb6) )
  	ROM_LOAD( "ic8.bin",   0x4800, 0x0800, CRC(04972fa8) SHA1(89833a7c893168acd5599ca7ad4b33a8f3df40c5) )
  	ROM_LOAD( "ic9.bin",   0x5000, 0x0800, CRC(9caf9057) SHA1(26d439678e5e4d375ffac60126f45de599575bfd) )
  	ROM_LOAD( "ic10.bin",  0x5800, 0x0800, CRC(e1bdcfe1) SHA1(c99457c18fae8de79bbbe6bc0471fdc83f1e9b19) )
  	ROM_LOAD( "ic13.bin",  0x6000, 0x0800, CRC(d454de19) SHA1(ae8abb8a9d999d11ba6ad341bf635ae822d5746f) )
  	ROM_LOAD( "ic14.bin",  0x6800, 0x0800, CRC(7fbd5d30) SHA1(be0554ade440bf255131466ee8bd2905d3f446a8) )
  	ROM_LOAD( "ic15.bin",  0x7000, 0x0800, CRC(93ea2df9) SHA1(4f7d076deef1e14b568b06974194861d3789ab5c) )
  	ROM_LOAD( "ic16.bin",  0x7800, 0x0800, CRC(9ec5fe09) SHA1(ab50373b330f21f7f64657e088ba6968a3176be4) ) // different
  	ROM_RELOAD(            0xf800, 0x0800 ) /* for the reset/interrupt vectors */
  	ROM_LOAD( "ic22.bin",  0x8000, 0x0800, CRC(21092f1f) SHA1(dd8be669cd7a51ec84e020d0a7fa50708155d084) ) // different
  	ROM_LOAD( "ic23.bin",   0x8800, 0x0800, CRC(8f1b313a) SHA1(0c7832505a1287533d9b2d7f2d54000b3b44e40d) )
  	ROM_LOAD( "ic24.bin",   0x9000, 0x0800, CRC(e74f98e0) SHA1(89a93de6105195e0e5d255bfa240538ded155fb9) )
  
  	ROM_REGION( 0x1000, "gfx1", 0 )
  	ROM_LOAD( "ic73.bin",   0x0000, 0x0800, CRC(e837c62b) SHA1(97552b1e413a3934f4dc5a6fc9fc1fa8ba7a2e7e) )
  	ROM_LOAD( "ic75.bin",   0x0800, 0x0800, CRC(83f61623) SHA1(4cb28f85f32d13bfa364c376ea3e30fd451b5884) )
  
  	ROM_REGION( 0x0020, "proms", 0 )
  	ROM_LOAD( "zarz138.03",   0x0000, 0x0020, CRC(5dd6933a) SHA1(417d827d9e47b6db01fecc2164e5ef332d4cd70e) )
  
  	ROM_REGION( 0x1000, "snk6502", 0 )  /* sound data for Vanguard-style audio section */
  	ROM_LOAD( "ic53.bin",   0x0000, 0x0800, CRC(8cb95a6b) SHA1(41d3986f1c2876a914b0087127ae99e9a2b41564) ) // different
  	ROM_LOAD( "ic54.bin",   0x0800, 0x0800, CRC(580934d2) SHA1(c1c7eba56bca2a0ea6a68c0245b071a3308f92bd) )
  ROM_END
  
  ROM_START( zarzon )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "zarz122.07",   0x4000, 0x0800, CRC(bdfa67e2) SHA1(0de06cf53ee21b8f14b933b61e6dc706338746c4) )
  	ROM_LOAD( "zarz123.08",   0x4800, 0x0800, CRC(d034e61e) SHA1(dc802c3d7a9f7e473e323e3272fca406dab6d55d) )
  	ROM_LOAD( "zarz124.09",   0x5000, 0x0800, CRC(296397ea) SHA1(3a1ad7f3c4453bb20768b3e3ce04cd76873aa0ee) )
  	ROM_LOAD( "zarz125.10",   0x5800, 0x0800, CRC(26dc5e66) SHA1(07f47f3497bb85640e5e6a89ad7d6579108347fe) )
  	ROM_LOAD( "zarz126.13",   0x6000, 0x0800, CRC(cee18d7f) SHA1(5a7e60b6be06b3038f2eb81e76fc54cb65d4877b) )
  	ROM_LOAD( "zarz127.14",   0x6800, 0x0800, CRC(bbd2cc0d) SHA1(1128020b7c0f38f5ff2cc2da0fd2df5ebead4681) )
  	ROM_LOAD( "zarz128.15",   0x7000, 0x0800, CRC(93ea2df9) SHA1(4f7d076deef1e14b568b06974194861d3789ab5c) )
  	ROM_LOAD( "zarz129.16",   0x7800, 0x0800, CRC(e67ec873) SHA1(14158914f07cabe61abc400c371d742ceb61d165) )
  	ROM_RELOAD(               0xf800, 0x0800 ) /* for the reset/interrupt vectors */
  	ROM_LOAD( "zarz130.22",   0x8000, 0x0800, CRC(22c44650) SHA1(063915cde86aece8860db1df15497cde669e73bd) )
  	ROM_LOAD( "zarz131.23",   0x8800, 0x0800, CRC(7be20678) SHA1(872de953df1f9f1725e14fdfd227ad872a813af8) )
  	ROM_LOAD( "zarz132.24",   0x9000, 0x0800, CRC(72b2cb76) SHA1(d7a95c908fe2227e2a0820a8e9713b1709c9e5af) )
  
  	ROM_REGION( 0x1000, "gfx1", 0 )
  	ROM_LOAD( "zarz135.73",   0x0000, 0x0800, CRC(e837c62b) SHA1(97552b1e413a3934f4dc5a6fc9fc1fa8ba7a2e7e) )
  	ROM_LOAD( "zarz136.75",   0x0800, 0x0800, CRC(83f61623) SHA1(4cb28f85f32d13bfa364c376ea3e30fd451b5884) )
  
  	ROM_REGION( 0x0020, "proms", 0 )
  	ROM_LOAD( "zarz138.03",   0x0000, 0x0020, CRC(5dd6933a) SHA1(417d827d9e47b6db01fecc2164e5ef332d4cd70e) )
  
  	ROM_REGION( 0x1000, "snk6502", 0 )  /* sound data for Vanguard-style audio section */
  	ROM_LOAD( "zarz133.53",   0x0000, 0x0800, CRC(b253cf78) SHA1(56a73b22ed2866222c407a3e9b51b8e0c92cf2aa) )
  	ROM_LOAD( "zarz134.54",   0x0800, 0x0800, CRC(580934d2) SHA1(c1c7eba56bca2a0ea6a68c0245b071a3308f92bd) )
  ROM_END
  
  ROM_START( vanguard )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "sk4_ic07.bin", 0x4000, 0x1000, CRC(6a29e354) SHA1(ff953962ebc14a28cfc96f8e269cb1e1c188ed8a) )
  	ROM_LOAD( "sk4_ic08.bin", 0x5000, 0x1000, CRC(302bba54) SHA1(1944f229481328a0635fafda65054106f42a532a) )
  	ROM_LOAD( "sk4_ic09.bin", 0x6000, 0x1000, CRC(424755f6) SHA1(b4762b40c7ed70d4b90319a1a30983a41a096afb) )
  	ROM_LOAD( "sk4_ic10.bin", 0x7000, 0x1000, CRC(54603274) SHA1(31571a560dbe300417b3ed5b114fa1d9ef742da9) )
  	ROM_LOAD( "sk4_ic13.bin", 0x8000, 0x1000, CRC(fde157d0) SHA1(3f705fb6a410004f4f86283694e3694e49701af6) )
  	ROM_RELOAD(               0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "sk4_ic14.bin", 0x9000, 0x1000, CRC(0d5b47d0) SHA1(922621c23f33fe756cb6baa12e5465c4e64f2dda) )
  	ROM_LOAD( "sk4_ic15.bin", 0xa000, 0x1000, CRC(8549b8f8) SHA1(375bc6f7e15564d5cf7e00c44e2651793c56d6ca) )
  	ROM_LOAD( "sk4_ic16.bin", 0xb000, 0x1000, CRC(062e0be2) SHA1(45aaf315a62f37460e32d3ba99caaacf4c994810) )
  
  	ROM_REGION( 0x1000, "gfx1", 0 )
  	ROM_LOAD( "sk5_ic50.bin", 0x0000, 0x0800, CRC(e7d4315b) SHA1(b99e4ea07292a0eabaa6098037c92a5678627cec) )
  	ROM_LOAD( "sk5_ic51.bin", 0x0800, 0x0800, CRC(96e87858) SHA1(4e9ccb055919c8acf5837e062857647d5363af60) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "sk5_ic7.bin",  0x0000, 0x0020, CRC(ad782a73) SHA1(ddf44f74a20f10ed976c434a885857dade1f86d7) ) /* foreground colors */
  	ROM_LOAD( "sk5_ic6.bin",  0x0020, 0x0020, CRC(7dc9d450) SHA1(9b2d1dfb3270a562d14bd54bfb3405a9095becc0) ) /* background colors */
  
  	ROM_REGION( 0x1000, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "sk4_ic51.bin", 0x0000, 0x0800, CRC(d2a64006) SHA1(3f20b59ce1954f65535cd5603ca9271586428e35) )  /* sound ROM 1 */
  	ROM_LOAD( "sk4_ic52.bin", 0x0800, 0x0800, CRC(cc4a0b6f) SHA1(251b24d60083d516c4ba686d75b41e04d10f7198) )  /* sound ROM 2 */
  
  	ROM_REGION( 0x5800, "speech", 0 )	/* space for the speech ROMs (not supported) */
  	//ROM_LOAD( "hd38882.bin",  0x0000, 0x4000, NO_DUMP )   /* HD38882 internal ROM */
  	ROM_LOAD( "sk6_ic07.bin", 0x4000, 0x0800, CRC(2b7cbae9) SHA1(3d44a0232d7c94d8170cc06e90cc30bd57c99202) )
  	ROM_LOAD( "sk6_ic08.bin", 0x4800, 0x0800, CRC(3b7e9d7c) SHA1(d9033188068b2aaa1502c89cf09f955eded8fa7a) )
  	ROM_LOAD( "sk6_ic11.bin", 0x5000, 0x0800, CRC(c36df041) SHA1(8b51934229b961180d1edb99be3a4d337d37f66f) )
  ROM_END
  
  ROM_START( vanguardc )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "sk4_ic07.bin", 0x4000, 0x1000, CRC(6a29e354) SHA1(ff953962ebc14a28cfc96f8e269cb1e1c188ed8a) )
  	ROM_LOAD( "sk4_ic08.bin", 0x5000, 0x1000, CRC(302bba54) SHA1(1944f229481328a0635fafda65054106f42a532a) )
  	ROM_LOAD( "sk4_ic09.bin", 0x6000, 0x1000, CRC(424755f6) SHA1(b4762b40c7ed70d4b90319a1a30983a41a096afb) )
  	ROM_LOAD( "4",            0x7000, 0x1000, CRC(770f9714) SHA1(4af37fc24e464681a8da6b184be0df32a4078f4f) )
  	ROM_LOAD( "5",            0x8000, 0x1000, CRC(3445cba6) SHA1(6afe6dad79b53df58b53ef9c5d24bb4d91fa5e8e) )
  	ROM_RELOAD(               0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "sk4_ic14.bin", 0x9000, 0x1000, CRC(0d5b47d0) SHA1(922621c23f33fe756cb6baa12e5465c4e64f2dda) )
  	ROM_LOAD( "sk4_ic15.bin", 0xa000, 0x1000, CRC(8549b8f8) SHA1(375bc6f7e15564d5cf7e00c44e2651793c56d6ca) )
  	ROM_LOAD( "8",            0xb000, 0x1000, CRC(4b825bc8) SHA1(3fa32d9677e2cc3a1ebf52c0b9eed7dbf11201e9) )
  
  	ROM_REGION( 0x1000, "gfx1", 0 )
  	ROM_LOAD( "sk5_ic50.bin", 0x0000, 0x0800, CRC(e7d4315b) SHA1(b99e4ea07292a0eabaa6098037c92a5678627cec) )
  	ROM_LOAD( "sk5_ic51.bin", 0x0800, 0x0800, CRC(96e87858) SHA1(4e9ccb055919c8acf5837e062857647d5363af60) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "sk5_ic7.bin",  0x0000, 0x0020, CRC(ad782a73) SHA1(ddf44f74a20f10ed976c434a885857dade1f86d7) ) /* foreground colors */
  	ROM_LOAD( "sk5_ic6.bin",  0x0020, 0x0020, CRC(7dc9d450) SHA1(9b2d1dfb3270a562d14bd54bfb3405a9095becc0) ) /* background colors */
  
  	ROM_REGION( 0x1000, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "sk4_ic51.bin", 0x0000, 0x0800, CRC(d2a64006) SHA1(3f20b59ce1954f65535cd5603ca9271586428e35) )  /* confirmed, 6/21/05 */
  	ROM_LOAD( "sk4_ic52.bin", 0x0800, 0x0800, CRC(cc4a0b6f) SHA1(251b24d60083d516c4ba686d75b41e04d10f7198) )  /* confirmed, 6/21/05 */
  
  	ROM_REGION( 0x5800, "speech", 0 )	/* space for the speech ROMs (not supported) */
  	//ROM_LOAD( "hd38882.bin",  0x0000, 0x4000, NO_DUMP )   /* HD38882 internal ROM */
  	ROM_LOAD( "sk6_ic07.bin", 0x4000, 0x0800, CRC(2b7cbae9) SHA1(3d44a0232d7c94d8170cc06e90cc30bd57c99202) )
  	ROM_LOAD( "sk6_ic08.bin", 0x4800, 0x0800, CRC(3b7e9d7c) SHA1(d9033188068b2aaa1502c89cf09f955eded8fa7a) )
  	ROM_LOAD( "sk6_ic11.bin", 0x5000, 0x0800, CRC(c36df041) SHA1(8b51934229b961180d1edb99be3a4d337d37f66f) )
  ROM_END
  
  ROM_START( vanguardj )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "sk4_ic07.bin", 0x4000, 0x1000, CRC(6a29e354) SHA1(ff953962ebc14a28cfc96f8e269cb1e1c188ed8a) )
  	ROM_LOAD( "sk4_ic08.bin", 0x5000, 0x1000, CRC(302bba54) SHA1(1944f229481328a0635fafda65054106f42a532a) )
  	ROM_LOAD( "sk4_ic09.bin", 0x6000, 0x1000, CRC(424755f6) SHA1(b4762b40c7ed70d4b90319a1a30983a41a096afb) )
  	ROM_LOAD( "vgj4ic10.bin", 0x7000, 0x1000, CRC(0a91a5d1) SHA1(bef435e431e31179eb22a4c18ca1dedf6a4a0ab0) )
  	ROM_LOAD( "vgj5ic13.bin", 0x8000, 0x1000, CRC(06601a40) SHA1(d1efcf75edf3892fe59d63e524f4880ffce67965) )
  	ROM_RELOAD(               0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "sk4_ic14.bin", 0x9000, 0x1000, CRC(0d5b47d0) SHA1(922621c23f33fe756cb6baa12e5465c4e64f2dda) )
  	ROM_LOAD( "sk4_ic15.bin", 0xa000, 0x1000, CRC(8549b8f8) SHA1(375bc6f7e15564d5cf7e00c44e2651793c56d6ca) )
  	ROM_LOAD( "sk4_ic16.bin", 0xb000, 0x1000, CRC(062e0be2) SHA1(45aaf315a62f37460e32d3ba99caaacf4c994810) )
  
  	ROM_REGION( 0x1000, "gfx1", 0 )
  	ROM_LOAD( "sk5_ic50.bin", 0x0000, 0x0800, CRC(e7d4315b) SHA1(b99e4ea07292a0eabaa6098037c92a5678627cec) )
  	ROM_LOAD( "sk5_ic51.bin", 0x0800, 0x0800, CRC(96e87858) SHA1(4e9ccb055919c8acf5837e062857647d5363af60) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "sk5_ic7.bin",  0x0000, 0x0020, CRC(ad782a73) SHA1(ddf44f74a20f10ed976c434a885857dade1f86d7) ) /* foreground colors */
  	ROM_LOAD( "sk5_ic6.bin",  0x0020, 0x0020, CRC(7dc9d450) SHA1(9b2d1dfb3270a562d14bd54bfb3405a9095becc0) ) /* background colors */
  
  	ROM_REGION( 0x1000, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "sk4_ic51.bin", 0x0000, 0x0800, CRC(d2a64006) SHA1(3f20b59ce1954f65535cd5603ca9271586428e35) )  /* sound ROM 1 */
  	ROM_LOAD( "sk4_ic52.bin", 0x0800, 0x0800, CRC(cc4a0b6f) SHA1(251b24d60083d516c4ba686d75b41e04d10f7198) )  /* sound ROM 2 */
  
  	ROM_REGION( 0x5800, "speech", 0 )	/* space for the speech ROMs (not supported) */
  	//ROM_LOAD( "hd38882.bin",  0x0000, 0x4000, NO_DUMP )   /* HD38882 internal ROM */
  	ROM_LOAD( "sk6_ic07.bin", 0x4000, 0x0800, CRC(2b7cbae9) SHA1(3d44a0232d7c94d8170cc06e90cc30bd57c99202) )
  	ROM_LOAD( "sk6_ic08.bin", 0x4800, 0x0800, CRC(3b7e9d7c) SHA1(d9033188068b2aaa1502c89cf09f955eded8fa7a) )
  	ROM_LOAD( "sk6_ic11.bin", 0x5000, 0x0800, CRC(c36df041) SHA1(8b51934229b961180d1edb99be3a4d337d37f66f) )
  ROM_END
  
  ROM_START( fantasyu )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "ic12.cpu",     0x3000, 0x1000, CRC(22cb2249) SHA1(6c43e3fa9638b6d2e069199968923e470bd5d18b) )
  	ROM_LOAD( "ic07.cpu",     0x4000, 0x1000, CRC(0e2880b6) SHA1(666d6942864eb7a90178b3b6e2b0eb23aa3c967f) )
  	ROM_LOAD( "ic08.cpu",     0x5000, 0x1000, CRC(4c331317) SHA1(800850f4e8bcfbbade54eb9e47a53941f8798641) )
  	ROM_LOAD( "ic09.cpu",     0x6000, 0x1000, CRC(6ac1dbfc) SHA1(b9c7bf8d3b085db0b53646b5639c09f9ced2b1fe) )
  	ROM_LOAD( "ic10.cpu",     0x7000, 0x1000, CRC(c796a406) SHA1(1b7f5f307a81b481a3e7791128a01d4c1a20c4bf) )
  	ROM_LOAD( "ic14.cpu",     0x8000, 0x1000, CRC(6f1f0698) SHA1(05bd114dcd08c990d897518a8ea7965bc82279bf) )
  	ROM_RELOAD(               0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "ic15.cpu",     0x9000, 0x1000, CRC(5534d57e) SHA1(e564a3325766423b47de18d6adb61760cbbf88be) )
  	ROM_LOAD( "ic16.cpu",     0xa000, 0x1000, CRC(6c2aeb6e) SHA1(fd0b913a663bf2a5f45fc3d342d7575a9c7dae46) )
  	ROM_LOAD( "ic17.cpu",     0xb000, 0x1000, CRC(f6aa5de1) SHA1(ca53cf66cc6cdb21a60760102f35a5b0745ce09b) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "fs10ic50.bin", 0x0000, 0x1000, CRC(86a801c3) SHA1(c040b5807c25823072f7e8ceab57b95d4bed89fe) )
  	ROM_LOAD( "fs11ic51.bin", 0x1000, 0x1000, CRC(9dfff71c) SHA1(7a7c017170f2ea903a730a4e5ab69db379a4fc61) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "fantasy.ic7",  0x0000, 0x0020, CRC(361a5e99) SHA1(b9777ce658549c03971bd476482d5cc0be27d3a9) ) /* foreground colors */
  	ROM_LOAD( "fantasy.ic6",  0x0020, 0x0020, CRC(33d974f7) SHA1(a6f6a531dec3f454b477bfdda8e213e9cad42748) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "fs_b_51.bin",  0x0000, 0x0800, CRC(48094ec5) SHA1(7d6118133bc1eb8ebc5d8a95d10ef842daffef89) )
  	ROM_LOAD( "fs_a_52.bin",  0x0800, 0x0800, CRC(1d0316e8) SHA1(6a3ab289b5fefef8663514bd1d5817c70fe58882) )
  	ROM_LOAD( "fs_c_53.bin",  0x1000, 0x0800, CRC(49fd4ae8) SHA1(96ff1267c0ffab1e8a0769fa869516e2546ab640) )
  
  	ROM_REGION( 0x5800, "speech", 0 )	/* space for the speech ROMs (not supported) */
  	//ROM_LOAD( "hd38882.bin",  0x0000, 0x4000, NO_DUMP )   /* HD38882 internal ROM */
  	ROM_LOAD( "fs_d_7.bin",   0x4000, 0x0800, CRC(a7ef4cc6) SHA1(8df71cb18fcfe9a2f592f83bc01cf2314ae30e32) )
  	ROM_LOAD( "fs_e_8.bin",   0x4800, 0x0800, CRC(19b8fb3e) SHA1(271c76f68866c28bc6755238a71970d5f7c81ecb) )
  	ROM_LOAD( "fs_f_11.bin",  0x5000, 0x0800, CRC(3a352e1f) SHA1(af880ce3daed0877d454421bd08c86ff71f6bf72) )
  ROM_END
  
  ROM_START( fantasy )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "5.12",         0x3000, 0x1000, CRC(0968ab50) SHA1(f09d03a171349895c5cb69e684901be63d272b32) )
  	ROM_LOAD( "1.7",          0x4000, 0x1000, CRC(de83000e) SHA1(ede1dda46406b4d340f1efea3bc85b2227af9e1d) )
  	ROM_LOAD( "2.8",          0x5000, 0x1000, CRC(90499b5a) SHA1(81a9d93a5655d2ff9504036bc764d8bb81e1470d) )
  	ROM_LOAD( "3.9",          0x6000, 0x1000, CRC(6fbffeb6) SHA1(b36aeaf095da4957103c8921957ff4be658eddf5) )
  	ROM_LOAD( "4.10",         0x7000, 0x1000, CRC(02e85884) SHA1(71fa6eb375fc417f92c049ec5118818b9ad48468) )
  	ROM_LOAD( "ic14.cpu",     0x8000, 0x1000, CRC(6f1f0698) SHA1(05bd114dcd08c990d897518a8ea7965bc82279bf) )
  	ROM_RELOAD(               0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "ic15.cpu",     0x9000, 0x1000, CRC(5534d57e) SHA1(e564a3325766423b47de18d6adb61760cbbf88be) )
  	ROM_LOAD( "8.16",         0xa000, 0x1000, CRC(371129fe) SHA1(c21759222aebcc9ea1292e367a41ac43a4dd3554) )
  	ROM_LOAD( "9.17",         0xb000, 0x1000, CRC(56a7c8b8) SHA1(6c417644851c7b4b5291d9c5b2c808ff4a1ad048) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "fs10ic50.bin", 0x0000, 0x1000, CRC(86a801c3) SHA1(c040b5807c25823072f7e8ceab57b95d4bed89fe) )
  	ROM_LOAD( "fs11ic51.bin", 0x1000, 0x1000, CRC(9dfff71c) SHA1(7a7c017170f2ea903a730a4e5ab69db379a4fc61) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "fantasy.ic7",  0x0000, 0x0020, CRC(361a5e99) SHA1(b9777ce658549c03971bd476482d5cc0be27d3a9) ) /* foreground colors */
  	ROM_LOAD( "fantasy.ic6",  0x0020, 0x0020, CRC(33d974f7) SHA1(a6f6a531dec3f454b477bfdda8e213e9cad42748) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "fs_b_51.bin",  0x0000, 0x0800, CRC(48094ec5) SHA1(7d6118133bc1eb8ebc5d8a95d10ef842daffef89) )
  	ROM_LOAD( "fs_a_52.bin",  0x0800, 0x0800, CRC(1d0316e8) SHA1(6a3ab289b5fefef8663514bd1d5817c70fe58882) )
  	ROM_LOAD( "fs_c_53.bin",  0x1000, 0x0800, CRC(49fd4ae8) SHA1(96ff1267c0ffab1e8a0769fa869516e2546ab640) )
  
  	ROM_REGION( 0x5800, "speech", 0 )	/* space for the speech ROMs (not supported) */
  	//ROM_LOAD( "hd38882.bin",  0x0000, 0x4000, NO_DUMP )   /* HD38882 internal ROM */
  	ROM_LOAD( "fs_d_7.bin",   0x4000, 0x0800, CRC(a7ef4cc6) SHA1(8df71cb18fcfe9a2f592f83bc01cf2314ae30e32) )
  	ROM_LOAD( "fs_e_8.bin",   0x4800, 0x0800, CRC(19b8fb3e) SHA1(271c76f68866c28bc6755238a71970d5f7c81ecb) )
  	ROM_LOAD( "fs_f_11.bin",  0x5000, 0x0800, CRC(3a352e1f) SHA1(af880ce3daed0877d454421bd08c86ff71f6bf72) )
  ROM_END
  
  ROM_START( fantasyj )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "fs5jic12.bin", 0x3000, 0x1000, CRC(dd1eac89) SHA1(d63078d4666e3c6db0c9b3f8b45ef81606ed5a4f) )
  	ROM_LOAD( "fs1jic7.bin",  0x4000, 0x1000, CRC(7b8115ae) SHA1(6274f937c57ab9cbb7c6283022b81f70dad7c232) )
  	ROM_LOAD( "fs2jic8.bin",  0x5000, 0x1000, CRC(61531dd1) SHA1(f3bc405bafc8ced6c6fce93ad2ad20ff6aa603e8) )
  	ROM_LOAD( "fs3jic9.bin",  0x6000, 0x1000, CRC(36a12617) SHA1(dd74abb4cbaeb1a56ee466043997187ebe933612) )
  	ROM_LOAD( "fs4jic10.bin", 0x7000, 0x1000, CRC(dbf7c347) SHA1(1bb3f924a7e1ec74ef68e237a0f68d62ce78532c) )
  	ROM_LOAD( "fs6jic14.bin", 0x8000, 0x1000, CRC(bf59a33a) SHA1(bdbdd03199758069b904fdf0455193682c4d457f) )
  	ROM_RELOAD(               0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "fs7jic15.bin", 0x9000, 0x1000, CRC(cc18428e) SHA1(c7c0a031434cf9ce3c450b0c5dc2b154b08d19cf) )
  	ROM_LOAD( "fs8jic16.bin", 0xa000, 0x1000, CRC(ae5bf727) SHA1(3c5eaaba3971f57a5687945a614dd0d6c9e007d6) )
  	ROM_LOAD( "fs9jic17.bin", 0xb000, 0x1000, CRC(fa6903e2) SHA1(a5b9b7309ecaaeaba76e45610d5ab80415ecbdd0) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "fs10ic50.bin", 0x0000, 0x1000, CRC(86a801c3) SHA1(c040b5807c25823072f7e8ceab57b95d4bed89fe) )
  	ROM_LOAD( "fs11ic51.bin", 0x1000, 0x1000, CRC(9dfff71c) SHA1(7a7c017170f2ea903a730a4e5ab69db379a4fc61) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "prom-8.bpr",   0x0000, 0x0020, CRC(1aa9285a) SHA1(d503aa76ca0cf032c7b1c962abc59677c41a2c62) ) /* foreground colors */
  	ROM_LOAD( "prom-7.bpr",   0x0020, 0x0020, CRC(7a6f7dc3) SHA1(e15d898275d1cd205cc2d28f7dd9df653594039e) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "fs_b_51.bin",  0x0000, 0x0800, CRC(48094ec5) SHA1(7d6118133bc1eb8ebc5d8a95d10ef842daffef89) )
  	ROM_LOAD( "fs_a_52.bin",  0x0800, 0x0800, CRC(1d0316e8) SHA1(6a3ab289b5fefef8663514bd1d5817c70fe58882) )
  	ROM_LOAD( "fs_c_53.bin",  0x1000, 0x0800, CRC(49fd4ae8) SHA1(96ff1267c0ffab1e8a0769fa869516e2546ab640) )
  
  	ROM_REGION( 0x5800, "speech", 0 )	/* space for the speech ROMs (not supported) */
  	//ROM_LOAD( "hd38882.bin",  0x0000, 0x4000, NO_DUMP )   /* HD38882 internal ROM */
  	ROM_LOAD( "fs_d_7.bin",   0x4000, 0x0800, CRC(a7ef4cc6) SHA1(8df71cb18fcfe9a2f592f83bc01cf2314ae30e32) )
  	ROM_LOAD( "fs_e_8.bin",   0x4800, 0x0800, CRC(19b8fb3e) SHA1(271c76f68866c28bc6755238a71970d5f7c81ecb) )
  	ROM_LOAD( "fs_f_11.bin",  0x5000, 0x0800, CRC(3a352e1f) SHA1(af880ce3daed0877d454421bd08c86ff71f6bf72) )
  ROM_END
  
  ROM_START( pballoon )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "sk7_ic12.bin", 0x3000, 0x1000, CRC(dfe2ae05) SHA1(21c98bef9d4d5fcb65ce5e9b20cde2259840459e) )
  	ROM_LOAD( "sk7_ic07.bin", 0x4000, 0x1000, CRC(736e67df) SHA1(a58d9561f62d396ca90b0f69afe6240d809b10bb) )
  	ROM_LOAD( "sk7_ic08.bin", 0x5000, 0x1000, CRC(7a2032b2) SHA1(79570943468d647cda67d94b20eac1b2d9eb371f) )
  	ROM_LOAD( "sk7_ic09.bin", 0x6000, 0x1000, CRC(2d63cf3a) SHA1(8934af617229db445f9fd10e4028e1f8df4cfeb1) )
  	ROM_LOAD( "sk7_ic10.bin", 0x7000, 0x1000, CRC(7b88cbd4) SHA1(1be3c484bd08c747f38389114c157e84319c48be) )
  	ROM_LOAD( "sk7_ic14.bin", 0x8000, 0x1000, CRC(6a8817a5) SHA1(4cf8eda68d21b1fad0f12eedaeb88b256bba44da) )
  	ROM_RELOAD(               0xf000, 0x1000 )  /* for the reset and interrupt vectors */
  	ROM_LOAD( "sk7_ic15.bin", 0x9000, 0x1000, CRC(1f78d814) SHA1(7e618971f1bbf8859284531e94989c43c3285b4a) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "sk8_ic50.bin", 0x0000, 0x1000, CRC(560df07f) SHA1(e57945de829d22d39390a649eddaf78c989af679) )
  	ROM_LOAD( "sk8_ic51.bin", 0x1000, 0x1000, CRC(d415de51) SHA1(257cf939efec8adee87baf827315c69fde90da4c) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "sk8_ic7.bin",  0x0000, 0x0020, CRC(ef6c82a0) SHA1(95b522d6389f25bf5fa2fca5f3f826ef43b2885b) ) /* foreground colors */
  	ROM_LOAD( "sk8_ic6.bin",  0x0020, 0x0020, CRC(eabc6a00) SHA1(942af5e22e49e578c6a24651476e3b60d40e2076) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "sk7_ic51.bin", 0x0000, 0x0800, CRC(0345f8b7) SHA1(c00992dc7222cc53d9fdff4ab47a7abdf90c5116) )
  	ROM_LOAD( "sk7_ic52.bin", 0x0800, 0x0800, CRC(5d6d68ea) SHA1(d3e03720eff5c85c1c2fb1d4bf960f45a99dc86a) )
  	ROM_LOAD( "sk7_ic53.bin", 0x1000, 0x0800, CRC(a4c505cd) SHA1(47eea7e7ffa3dc8b35dc050ac1a1d77d6a5c4ece) )
  ROM_END
  
  ROM_START( nibbler )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "g-0960-52.ic12", 0x3000, 0x1000, CRC(ac6a802b) SHA1(ac1072e30994f13097663dc24d9d1dc35a95d874) )
  	ROM_LOAD( "g-0960-48.ic7",  0x4000, 0x1000, CRC(35971364) SHA1(6430c7be9e5f47d3f1f2cc157d949246e4085e8b) )
  	ROM_LOAD( "g-0960-49.ic8",  0x5000, 0x1000, CRC(6b33b806) SHA1(29444e45bf5a6ab1d86e0aa19dc6c1bc64ba633f) )
  	ROM_LOAD( "g-0960-50.ic9",  0x6000, 0x1000, CRC(91a4f98d) SHA1(678c7e8c91a7fdba8dc2faff4192eb0964abdb3f) )
  	ROM_LOAD( "g-0960-51.ic10", 0x7000, 0x1000, CRC(a151d934) SHA1(6681bdcd84cf62b40b2430ff530cb3c9aa36656c) )
  	ROM_LOAD( "g-0960-53.ic14", 0x8000, 0x1000, CRC(063f05cc) SHA1(039ac1b007cb817ae0902484ca611ae7076930d6) )
  	ROM_RELOAD(                 0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "g-0960-54.ic15", 0x9000, 0x1000, CRC(7205fb8d) SHA1(bc341bc11a383aa8b8dd7b2be851907a3ec56f8b) )
  	ROM_LOAD( "g-0960-55.ic16", 0xa000, 0x1000, CRC(4bb39815) SHA1(1755c28d7d300524ab839aedcc744254544e9c19) )
  	ROM_LOAD( "g-0960-56.ic17", 0xb000, 0x1000, CRC(ed680f19) SHA1(b44203585f32ebe2a3bf0597eac7c0faa7e81a92) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "g-0960-57.ic50", 0x0000, 0x1000, CRC(01d4d0c2) SHA1(5a8026210a872351ce4e39e27f6479d3ca0689e2) )
  	ROM_LOAD( "g-0960-58.ic51", 0x1000, 0x1000, CRC(feff7faf) SHA1(50005502578a4ea9b9c8f36998670b787d2d0b20) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "g-0708-05.ic7",  0x0000, 0x0020, CRC(a5709ff3) SHA1(fbd07b756235f2d03aea3d777ca741ade54be200) ) /* foreground colors */
  	ROM_LOAD( "g-0708-04.ic6",  0x0020, 0x0020, CRC(dacd592d) SHA1(c7709c680e2764885a40bc256d07dffc9e827cd6) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "g-0959-43.ic51", 0x0000, 0x0800, CRC(0345f8b7) SHA1(c00992dc7222cc53d9fdff4ab47a7abdf90c5116) )
  	ROM_LOAD( "g-0959-44.ic52", 0x0800, 0x0800, CRC(87d67dee) SHA1(bd292eab3671cb953279f3136a450deac3818367) )
  	ROM_LOAD( "g-0959-45.ic53", 0x1000, 0x0800, CRC(33189917) SHA1(01a1b1693db0172609780daeb60430fa0c8bcec2) )
  ROM_END
  
  ROM_START( nibblera )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "ic12",           0x3000, 0x1000, CRC(6dfa1be5) SHA1(bb265702a2f74cb7d5ba27081f9fb2fe01dd95a5) )
  	ROM_LOAD( "ic7",            0x4000, 0x1000, CRC(808e1a03) SHA1(a747a16ee0c8cb803b72ac84e80f791b2bf1813a) )
  	ROM_LOAD( "ic8",            0x5000, 0x1000, CRC(1571d4a2) SHA1(42cbaa262c2265d904fd5844c0d3c63d3beb67a8) )
  	ROM_LOAD( "ic9",            0x6000, 0x1000, CRC(a599df10) SHA1(68ee8b5199ec24409fcbb40c887a1eec44c68dcf) )
  	ROM_LOAD( "ic10",           0x7000, 0x1000, CRC(a6b5abe5) SHA1(a0f228dac801a54dfa1947d6b2f6b4e3d005e0b2) )
  	ROM_LOAD( "ic14",           0x8000, 0x1000, CRC(9f537185) SHA1(619df63f4df38014dc229f614043f867e6a5aa51) )
  	ROM_RELOAD(                 0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "g-0960-54.ic15", 0x9000, 0x1000, CRC(7205fb8d) SHA1(bc341bc11a383aa8b8dd7b2be851907a3ec56f8b) )
  	ROM_LOAD( "g-0960-55.ic16", 0xa000, 0x1000, CRC(4bb39815) SHA1(1755c28d7d300524ab839aedcc744254544e9c19) )
  	ROM_LOAD( "g-0960-56.ic17", 0xb000, 0x1000, CRC(ed680f19) SHA1(b44203585f32ebe2a3bf0597eac7c0faa7e81a92) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "g-0960-57.ic50", 0x0000, 0x1000, CRC(01d4d0c2) SHA1(5a8026210a872351ce4e39e27f6479d3ca0689e2) )
  	ROM_LOAD( "g-0960-58.ic51", 0x1000, 0x1000, CRC(feff7faf) SHA1(50005502578a4ea9b9c8f36998670b787d2d0b20) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "g-0708-05.ic7",  0x0000, 0x0020, CRC(a5709ff3) SHA1(fbd07b756235f2d03aea3d777ca741ade54be200) ) /* foreground colors */
  	ROM_LOAD( "g-0708-04.ic6",  0x0020, 0x0020, CRC(dacd592d) SHA1(c7709c680e2764885a40bc256d07dffc9e827cd6) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "g-0959-43.ic51", 0x0000, 0x0800, CRC(0345f8b7) SHA1(c00992dc7222cc53d9fdff4ab47a7abdf90c5116) )
  	ROM_LOAD( "g-0959-44.ic52", 0x0800, 0x0800, CRC(87d67dee) SHA1(bd292eab3671cb953279f3136a450deac3818367) )
  	ROM_LOAD( "g-0959-45.ic53", 0x1000, 0x0800, CRC(33189917) SHA1(01a1b1693db0172609780daeb60430fa0c8bcec2) )
  ROM_END
  
  ROM_START( nibblerb )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "50-144.012",     0x3000, 0x1000, CRC(68af8f4b) SHA1(be6ddd3a9abb05563c927b1ec54dbaab44b65492) )
  	ROM_LOAD( "50-140.007",     0x4000, 0x1000, CRC(c18b3009) SHA1(c3703d0300f5f1546417ecdc27ab747d9c7eb267) )
  	ROM_LOAD( "50-141.008",     0x5000, 0x1000, CRC(b50fd79c) SHA1(cd9847bf8d570ca9411d1bbcbccb3c94220349f9) )
  	ROM_LOAD( "ic9",            0x6000, 0x1000, CRC(a599df10) SHA1(68ee8b5199ec24409fcbb40c887a1eec44c68dcf) ) // 50-142.009
  	ROM_LOAD( "ic10",           0x7000, 0x1000, CRC(a6b5abe5) SHA1(a0f228dac801a54dfa1947d6b2f6b4e3d005e0b2) ) // 50-143.010
  	ROM_LOAD( "50-145.014",     0x8000, 0x1000, CRC(29ea246a) SHA1(bf1afbddbea5ab7e93e5ac69c6445749dd65ed3b) )
  	ROM_RELOAD(                 0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "g-0960-54.ic15", 0x9000, 0x1000, CRC(7205fb8d) SHA1(bc341bc11a383aa8b8dd7b2be851907a3ec56f8b) ) // 50-146.015
  	ROM_LOAD( "g-0960-55.ic16", 0xa000, 0x1000, CRC(4bb39815) SHA1(1755c28d7d300524ab839aedcc744254544e9c19) ) // 50-147.016
  	ROM_LOAD( "g-0960-56.ic17", 0xb000, 0x1000, CRC(ed680f19) SHA1(b44203585f32ebe2a3bf0597eac7c0faa7e81a92) ) // 50-148.017
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "g-0960-57.ic50", 0x0000, 0x1000, CRC(01d4d0c2) SHA1(5a8026210a872351ce4e39e27f6479d3ca0689e2) ) // 50-150.051
  	ROM_LOAD( "g-0960-58.ic51", 0x1000, 0x1000, CRC(feff7faf) SHA1(50005502578a4ea9b9c8f36998670b787d2d0b20) ) // 50-149.050
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "g-0708-05.ic7",  0x0000, 0x0020, CRC(a5709ff3) SHA1(fbd07b756235f2d03aea3d777ca741ade54be200) ) /* foreground colors */
  	ROM_LOAD( "g-0708-04.ic6",  0x0020, 0x0020, CRC(dacd592d) SHA1(c7709c680e2764885a40bc256d07dffc9e827cd6) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "g-0959-43.ic51", 0x0000, 0x0800, CRC(0345f8b7) SHA1(c00992dc7222cc53d9fdff4ab47a7abdf90c5116) ) // not in this set / board according to readme but it seems to be needed?!
  	ROM_LOAD( "g-0959-44.ic52", 0x0800, 0x0800, CRC(87d67dee) SHA1(bd292eab3671cb953279f3136a450deac3818367) ) // 50-152.052
  	ROM_LOAD( "g-0959-45.ic53", 0x1000, 0x0800, CRC(33189917) SHA1(01a1b1693db0172609780daeb60430fa0c8bcec2) ) // 50-151.053
  ROM_END
  
  ROM_START( nibblero )
  	ROM_REGION( 0x10000, "maincpu", 0 )
  	ROM_LOAD( "50-144g.012",    0x3000, 0x1000, CRC(1093f525) SHA1(6a63372300765acdbac1d2e30fd73af7773de80f) )
  	ROM_LOAD( "50-140g.007",    0x4000, 0x1000, CRC(848651dd) SHA1(a5aafbcca42baca8d0d5d28546733aefc778ba99) )
  	ROM_LOAD( "50-141.008",     0x5000, 0x1000, CRC(b50fd79c) SHA1(cd9847bf8d570ca9411d1bbcbccb3c94220349f9) )
  	ROM_LOAD( "ic9",            0x6000, 0x1000, CRC(a599df10) SHA1(68ee8b5199ec24409fcbb40c887a1eec44c68dcf) )
  	ROM_LOAD( "ic10",           0x7000, 0x1000, CRC(a6b5abe5) SHA1(a0f228dac801a54dfa1947d6b2f6b4e3d005e0b2) )
  	ROM_LOAD( "50-145.014",     0x8000, 0x1000, CRC(29ea246a) SHA1(bf1afbddbea5ab7e93e5ac69c6445749dd65ed3b) )
  	ROM_RELOAD(                 0xf000, 0x1000 )	/* for the reset and interrupt vectors */
  	ROM_LOAD( "g-0960-54.ic15", 0x9000, 0x1000, CRC(7205fb8d) SHA1(bc341bc11a383aa8b8dd7b2be851907a3ec56f8b) )
  	ROM_LOAD( "g-0960-55.ic16", 0xa000, 0x1000, CRC(4bb39815) SHA1(1755c28d7d300524ab839aedcc744254544e9c19) )
  	ROM_LOAD( "g-0960-56.ic17", 0xb000, 0x1000, CRC(ed680f19) SHA1(b44203585f32ebe2a3bf0597eac7c0faa7e81a92) )
  
  	ROM_REGION( 0x2000, "gfx1", 0 )
  	ROM_LOAD( "g-0960-57.ic50", 0x0000, 0x1000, CRC(01d4d0c2) SHA1(5a8026210a872351ce4e39e27f6479d3ca0689e2) )
  	ROM_LOAD( "g-0960-58.ic51", 0x1000, 0x1000, CRC(feff7faf) SHA1(50005502578a4ea9b9c8f36998670b787d2d0b20) )
  
  	ROM_REGION( 0x0040, "proms", 0 )
  	ROM_LOAD( "g-0708-05.ic7",  0x0000, 0x0020, CRC(a5709ff3) SHA1(fbd07b756235f2d03aea3d777ca741ade54be200) ) /* foreground colors */
  	ROM_LOAD( "g-0708-04.ic6",  0x0020, 0x0020, CRC(dacd592d) SHA1(c7709c680e2764885a40bc256d07dffc9e827cd6) ) /* background colors */
  
  	ROM_REGION( 0x1800, "snk6502", 0 )	/* sound ROMs */
  	ROM_LOAD( "g-0959-43.ic51", 0x0000, 0x0800, CRC(0345f8b7) SHA1(c00992dc7222cc53d9fdff4ab47a7abdf90c5116) )
  	ROM_LOAD( "g-0959-44.ic52", 0x0800, 0x0800, CRC(87d67dee) SHA1(bd292eab3671cb953279f3136a450deac3818367) )
  	ROM_LOAD( "g-0959-45.ic53", 0x1000, 0x0800, CRC(33189917) SHA1(01a1b1693db0172609780daeb60430fa0c8bcec2) )
  ROM_END
  
  
  /*************************************
   *
   *  Game drivers
   *
   *************************************/
  
  GAME( 1980, sasuke,   0,        sasuke,   sasuke,   0, ROT90, "SNK", "Sasuke vs. Commander", GAME_IMPERFECT_SOUND )
  GAME( 1981, satansat, 0,        satansat, satansat, 0, ROT90, "SNK", "Satan of Saturn (set 1)", GAME_IMPERFECT_SOUND )
  GAME( 1981, satansata,satansat, satansat, satansat, 0, ROT90, "SNK", "Satan of Saturn (set 2)", GAME_IMPERFECT_SOUND )
  GAME( 1981, zarzon,   satansat, satansat, satansat, 0, ROT90, "SNK (Taito America license)", "Zarzon", GAME_IMPERFECT_SOUND )
  GAME( 1981, vanguard, 0,        vanguard, vanguard, 0, ROT90, "SNK", "Vanguard (SNK)", GAME_IMPERFECT_SOUND )
  GAME( 1981, vanguardc,vanguard, vanguard, vanguard, 0, ROT90, "SNK (Centuri license)", "Vanguard (Centuri)", GAME_IMPERFECT_SOUND )
  GAME( 1981, vanguardj,vanguard, vanguard, vanguard, 0, ROT90, "SNK", "Vanguard (Japan)", GAME_IMPERFECT_SOUND )
  GAME( 1981, fantasy,  0,        fantasy,  fantasy,  0, ROT90, "SNK", "Fantasy (World)", GAME_IMPERFECT_SOUND )
  GAME( 1981, fantasyu, fantasy,  fantasy,  fantasyu, 0, ROT90, "SNK (Rock-Ola license)", "Fantasy (US)", GAME_IMPERFECT_SOUND )
  GAME( 1981, fantasyj, fantasy,  fantasy,  fantasyu, 0, ROT90, "SNK", "Fantasy (Japan)", GAME_IMPERFECT_SOUND )
  GAME( 1982, pballoon, 0,        pballoon, pballoon, 0, ROT90, "SNK", "Pioneer Balloon", 0 )
  GAME( 1982, nibbler,  0,        nibbler,  nibbler,  0, ROT90, "Rock-Ola", "Nibbler (set 1)", 0 )
  GAME( 1982, nibblera, nibbler,  nibbler,  nibblera, 0, ROT90, "Rock-Ola", "Nibbler (set 2)", 0 )
  GAME( 1982, nibblerb, nibbler,  nibbler,  nibblerb, 0, ROT90, "Rock-Ola", "Nibbler (set 3)", 0 )
  GAME( 1983, nibblero, nibbler,  nibbler,  nibblerb, 0, ROT90, "Rock-Ola (Olympia license)", "Nibbler (Olympia)", 0 )
  