text: /*
  
    "Simple" 156 based Data East Hardware
  
   Data East
    DE-0409-1
    DE-0491-1
  
   Mitchell
    MT5601-0 (slightly different component arrangement to Deco PCBs)
  
  
   Games Supported
  
    Data East:
      Joe & Mac Returns (Japanese version called Caveman Ninja 2 might exist)
      Chain Reaction / Magical Drop / Magical Drop Plus 1
  
    Mitchell games:
      Charlie Ninja
      Party Time: Gonta the Diver II / Ganbare! Gonta!! 2
      Osman / Cannon Dancer
  
  
    The DECO 156 is a 32-bit custom encrypted ARM5 chip connected to
    16-bit hardware only ROM and System Work Ram is accessed via all
    32 data lines we should throw away the MSB for other accesses
  
    Info from Charles MacDonald:
  
    - The sound effects 6295 is clocked at exactly half the rate of the
    music 6295.
    - Both have the SS pin pulled high to select the sample rate of the
    ADPCM data. Depends on the input clock though, the rates are described
    in the data sheet.
    - Both are connected directly to their ROMs with no swapping on the
    address or data lines. The music ROM is a 16-bit ROM in byte mode.
  
    The 156 data bus has pull-up resistors so reading unused locations will
    return $FFFF.
  
    I traced out all the connections and confirmed that both video chips (52
    and 141) really are on the lower 16 bits of the 32-bit data bus, same
    with the palette RAM. Just the program ROM and 4K internal RAM to the
    223 should be accessed as 32-bit. Not sure why that part isn't working
    right though.
  
    Each game has a 512K block of memory that is decoded in the same way.
    One of the PALs controls where this block starts at, for example
    0x380000 for Magical Drop and 0x180000 for Osman:
  
      000000-00FFFF : Main RAM (16K)
      010000-01FFFF : Sprite RAM (8K)
      020000-02FFFF : Palette RAM (4K)
      030000-03FFFF : simpl156_system_r / simpl156_eeprom_w
      040000-04FFFF : PF1,2 control registers
      050000-05FFFF : PF1,2 name tables
      060000-06FFFF : PF1,2 row scroll
      070000-07FFFF : Control register
  
    The ordering of items within the block does not change and the size of
    each region is always 64K. If any RAM or other I/O has to be mirrored,
    it likely fills out the entire 64K range.
  
    The control register (marked as MWA_NOP in the driver) pulls one of the
    DE156 pins high for a brief moment and low again. Perhaps it triggers an
    interrupt or reset? It doesn't seem to be connected to anything else, at
    least on my board.
  
    The sprite chip has 16K RAM but the highest address line is tied to
    ground, so only 8K is available. This is correctly implemented in the
    driver, I'm mentioning it to confirm it isn't banked or anything like that.
  
  
    Notes:
  
    Magical Drop / Magical Drop Plus / Chain Reaction
  
    Random crashes at 7mhz..
  
  -- check this ---
  
  Are the OKI M6295 clocks from Heavy Smash are correct at least for the Mitchell games:
  
   - OKI M6295(1) clock: 1.000MHz (28 / 28), sample rate = 1000000 / 132
   - OKI M6295(2) clock: 2.000MHz (28 / 14), sample rate = 2000000 / 132
  
  
  */
  
  #include "emu.h"
  #include "includes/decocrpt.h"
  #include "cpu/arm/arm.h"
  #include "includes/simpl156.h"
  #include "machine/eeprom.h"
  #include "sound/okim6295.h"
  #include "video/deco16ic.h"
  
  
  static INPUT_PORTS_START( simpl156 )
  	PORT_START("IN0")
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_COIN1 )
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_COIN2 )
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_SERVICE1 )
  	PORT_SERVICE_NO_TOGGLE( 0x0008, IP_ACTIVE_LOW )
  	PORT_BIT( 0x00f0, IP_ACTIVE_HIGH, IPT_VBLANK ) // all bits? check..
  	PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_SPECIAL ) // eeprom?..
  
  
  	PORT_START("IN1")
  	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
  	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
  	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
  	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
  	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
  	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
  	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(1)
  	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_START1 )
  	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2)
  	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2)
  	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
  	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
  	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
  	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
  	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(2)
  	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_START2 )
  INPUT_PORTS_END
  
  
  static READ32_HANDLER( simpl156_inputs_read )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	int eep = eeprom_read_bit(state->eeprom);
  	UINT32 returndata = input_port_read(space->machine, "IN0") ^ 0xffff0000;
  
  	returndata ^= ((eep << 8));
  	return returndata;
  }
  
  static READ32_HANDLER( simpl156_palette_r )
  {
  	return space->machine->generic.paletteram.u16[offset]^0xffff0000;
  }
  
  static WRITE32_HANDLER( simpl156_palette_w )
  {
  	UINT16 dat;
  	int color;
  
  	data &= 0x0000ffff;
  	mem_mask &= 0x0000ffff;
  
  	COMBINE_DATA(&space->machine->generic.paletteram.u16[offset]);
  	color = offset;
  
  	dat = space->machine->generic.paletteram.u16[offset] & 0xffff;
  	palette_set_color_rgb(space->machine,color,pal5bit(dat >> 0),pal5bit(dat >> 5),pal5bit(dat >> 10));
  }
  
  
  static READ32_HANDLER(  simpl156_system_r )
  {
  	UINT32 returndata;
  
  	returndata = input_port_read(space->machine, "IN1");
  
  	return returndata;
  }
  
  static WRITE32_HANDLER( simpl156_eeprom_w )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	//int okibank;
  
  	//okibank = data & 0x07;
  
  	state->okimusic->set_bank_base(0x40000 * (data & 0x7));
  
  	eeprom_set_clock_line(state->eeprom, BIT(data, 5) ? ASSERT_LINE : CLEAR_LINE);
  	eeprom_write_bit(state->eeprom, BIT(data, 4));
  	eeprom_set_cs_line(state->eeprom, BIT(data, 6) ? CLEAR_LINE : ASSERT_LINE);
  }
  
  
  /* we need to throw away bits for all ram accesses as the devices are connected as 16-bit */
  
  static READ32_HANDLER( simpl156_spriteram_r )
  {
  	return space->machine->generic.spriteram.u32[offset] ^ 0xffff0000;
  }
  
  static WRITE32_HANDLER( simpl156_spriteram_w )
  {
  	data &= 0x0000ffff;
  	mem_mask &= 0x0000ffff;
  
  	COMBINE_DATA(&space->machine->generic.spriteram.u32[offset]);
  }
  
  
  static READ32_HANDLER( simpl156_mainram_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	return state->mainram[offset]^0xffff0000;
  }
  
  static WRITE32_HANDLER( simpl156_mainram_w )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	data &= 0x0000ffff;
  	mem_mask &= 0x0000ffff;
  
  	COMBINE_DATA(&state->mainram[offset]);
  }
  
  static READ32_HANDLER( simpl156_pf1_rowscroll_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	return state->pf1_rowscroll[offset] ^ 0xffff0000;
  }
  
  static WRITE32_HANDLER( simpl156_pf1_rowscroll_w )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	data &= 0x0000ffff;
  	mem_mask &= 0x0000ffff;
  
  	COMBINE_DATA(&state->pf1_rowscroll[offset]);
  }
  
  static READ32_HANDLER( simpl156_pf2_rowscroll_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	return state->pf2_rowscroll[offset] ^ 0xffff0000;
  }
  
  static WRITE32_HANDLER( simpl156_pf2_rowscroll_w )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	data &= 0x0000ffff;
  	mem_mask &= 0x0000ffff;
  
  	COMBINE_DATA(&state->pf2_rowscroll[offset]);
  }
  
  /* Memory Map controled by PALs */
  
  /* Joe and Mac Returns */
  static ADDRESS_MAP_START( joemacr_map, ADDRESS_SPACE_PROGRAM, 32 )
  	AM_RANGE(0x000000, 0x07ffff) AM_ROM
  	AM_RANGE(0x100000, 0x107fff) AM_READWRITE(simpl156_mainram_r, simpl156_mainram_w) AM_BASE_MEMBER(simpl156_state, mainram) // main ram
  	AM_RANGE(0x110000, 0x111fff) AM_READWRITE(simpl156_spriteram_r, simpl156_spriteram_w) AM_BASE_SIZE_GENERIC(spriteram)
  	AM_RANGE(0x120000, 0x120fff) AM_READWRITE(simpl156_palette_r, simpl156_palette_w)
  	AM_RANGE(0x130000, 0x130003) AM_READWRITE(simpl156_system_r, simpl156_eeprom_w)
  	AM_RANGE(0x140000, 0x14001f) AM_DEVREADWRITE("deco_custom", deco16ic_pf12_control_dword_r, deco16ic_pf12_control_dword_w)
  	AM_RANGE(0x150000, 0x151fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x152000, 0x153fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x154000, 0x155fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf2_data_dword_r, deco16ic_pf2_data_dword_w)
  	AM_RANGE(0x160000, 0x161fff) AM_READWRITE(simpl156_pf1_rowscroll_r, simpl156_pf1_rowscroll_w)
  	AM_RANGE(0x164000, 0x165fff) AM_READWRITE(simpl156_pf2_rowscroll_r, simpl156_pf2_rowscroll_w)
  	AM_RANGE(0x170000, 0x170003) AM_READONLY AM_WRITENOP // ?
  	AM_RANGE(0x180000, 0x180003) AM_DEVREADWRITE8("okisfx", okim6295_r, okim6295_w, 0x000000ff)
  	AM_RANGE(0x1c0000, 0x1c0003) AM_DEVREADWRITE8("okimusic", okim6295_r, okim6295_w, 0x000000ff)
  	AM_RANGE(0x200000, 0x200003) AM_READ(simpl156_inputs_read)
  	AM_RANGE(0x201000, 0x201fff) AM_RAM AM_BASE_MEMBER(simpl156_state, systemram) // work ram (32-bit)
  ADDRESS_MAP_END
  
  
  /* Chain Reaction */
  static ADDRESS_MAP_START( chainrec_map, ADDRESS_SPACE_PROGRAM, 32 )
  	AM_RANGE(0x000000, 0x07ffff) AM_ROM // rom (32-bit)
  	AM_RANGE(0x200000, 0x200003) AM_READ(simpl156_inputs_read)
  	AM_RANGE(0x201000, 0x201fff) AM_RAM AM_BASE_MEMBER(simpl156_state, systemram) // work ram (32-bit)
  	AM_RANGE(0x3c0000, 0x3c0003) AM_DEVREADWRITE8("okimusic", okim6295_r, okim6295_w, 0x000000ff)
  	AM_RANGE(0x400000, 0x407fff) AM_READWRITE(simpl156_mainram_r, simpl156_mainram_w) AM_BASE_MEMBER(simpl156_state, mainram) // main ram?
  	AM_RANGE(0x410000, 0x411fff) AM_READWRITE(simpl156_spriteram_r, simpl156_spriteram_w) AM_BASE_SIZE_GENERIC(spriteram)
  	AM_RANGE(0x420000, 0x420fff) AM_READWRITE(simpl156_palette_r,simpl156_palette_w)
  	AM_RANGE(0x430000, 0x430003) AM_READWRITE(simpl156_system_r,simpl156_eeprom_w)
  	AM_RANGE(0x440000, 0x44001f) AM_DEVREADWRITE("deco_custom", deco16ic_pf12_control_dword_r, deco16ic_pf12_control_dword_w)
  	AM_RANGE(0x450000, 0x451fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x452000, 0x453fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x454000, 0x455fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf2_data_dword_r, deco16ic_pf2_data_dword_w)
  	AM_RANGE(0x460000, 0x461fff) AM_READWRITE(simpl156_pf1_rowscroll_r, simpl156_pf1_rowscroll_w)
  	AM_RANGE(0x464000, 0x465fff) AM_READWRITE(simpl156_pf2_rowscroll_r, simpl156_pf2_rowscroll_w)
  	AM_RANGE(0x470000, 0x470003) AM_READONLY AM_WRITENOP // ??
  	AM_RANGE(0x480000, 0x480003) AM_DEVREADWRITE8("okisfx", okim6295_r, okim6295_w, 0x000000ff)
  ADDRESS_MAP_END
  
  
  /* Magical Drop */
  static ADDRESS_MAP_START( magdrop_map, ADDRESS_SPACE_PROGRAM, 32 )
  	AM_RANGE(0x000000, 0x07ffff) AM_ROM
  	AM_RANGE(0x200000, 0x200003) AM_READ(simpl156_inputs_read)
  	AM_RANGE(0x201000, 0x201fff) AM_RAM AM_BASE_MEMBER(simpl156_state, systemram) // work ram (32-bit)
  	AM_RANGE(0x340000, 0x340003) AM_DEVREADWRITE8("okimusic", okim6295_r, okim6295_w, 0x000000ff)
  	AM_RANGE(0x380000, 0x387fff) AM_READWRITE(simpl156_mainram_r, simpl156_mainram_w) AM_BASE_MEMBER(simpl156_state, mainram) // main ram?
  	AM_RANGE(0x390000, 0x391fff) AM_READWRITE(simpl156_spriteram_r, simpl156_spriteram_w) AM_BASE_SIZE_GENERIC(spriteram)
  	AM_RANGE(0x3a0000, 0x3a0fff) AM_READWRITE(simpl156_palette_r,simpl156_palette_w)
  	AM_RANGE(0x3b0000, 0x3b0003) AM_READWRITE(simpl156_system_r,simpl156_eeprom_w)
  	AM_RANGE(0x3c0000, 0x3c001f) AM_DEVREADWRITE("deco_custom", deco16ic_pf12_control_dword_r, deco16ic_pf12_control_dword_w)
  	AM_RANGE(0x3d0000, 0x3d1fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x3d2000, 0x3d3fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x3d4000, 0x3d5fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf2_data_dword_r, deco16ic_pf2_data_dword_w)
  	AM_RANGE(0x3e0000, 0x3e1fff) AM_READWRITE(simpl156_pf1_rowscroll_r, simpl156_pf1_rowscroll_w)
  	AM_RANGE(0x3e4000, 0x3e5fff) AM_READWRITE(simpl156_pf2_rowscroll_r, simpl156_pf2_rowscroll_w)
  	AM_RANGE(0x3f0000, 0x3f0003) AM_READONLY AM_WRITENOP //?
  	AM_RANGE(0x400000, 0x400003) AM_DEVREADWRITE8("okisfx", okim6295_r, okim6295_w, 0x000000ff)
  ADDRESS_MAP_END
  
  
  /* Magical Drop Plus 1 */
  static ADDRESS_MAP_START( magdropp_map, ADDRESS_SPACE_PROGRAM, 32 )
  	AM_RANGE(0x000000, 0x07ffff) AM_ROM
  	AM_RANGE(0x200000, 0x200003) AM_READ(simpl156_inputs_read)
  	AM_RANGE(0x201000, 0x201fff) AM_RAM AM_BASE_MEMBER(simpl156_state, systemram) // work ram (32-bit)
  	AM_RANGE(0x4c0000, 0x4c0003) AM_DEVREADWRITE8("okimusic", okim6295_r, okim6295_w, 0x000000ff)
  	AM_RANGE(0x680000, 0x687fff) AM_READWRITE(simpl156_mainram_r, simpl156_mainram_w) AM_BASE_MEMBER(simpl156_state, mainram) // main ram?
  	AM_RANGE(0x690000, 0x691fff) AM_READWRITE(simpl156_spriteram_r, simpl156_spriteram_w) AM_BASE_SIZE_GENERIC(spriteram)
  	AM_RANGE(0x6a0000, 0x6a0fff) AM_READWRITE(simpl156_palette_r,simpl156_palette_w)
  	AM_RANGE(0x6b0000, 0x6b0003) AM_READWRITE(simpl156_system_r,simpl156_eeprom_w)
  	AM_RANGE(0x6c0000, 0x6c001f) AM_DEVREADWRITE("deco_custom", deco16ic_pf12_control_dword_r, deco16ic_pf12_control_dword_w)
  	AM_RANGE(0x6d0000, 0x6d1fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x6d2000, 0x6d3fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x6d4000, 0x6d5fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf2_data_dword_r, deco16ic_pf2_data_dword_w)
  	AM_RANGE(0x6e0000, 0x6e1fff) AM_READWRITE(simpl156_pf1_rowscroll_r, simpl156_pf1_rowscroll_w)
  	AM_RANGE(0x6e4000, 0x6e5fff) AM_READWRITE(simpl156_pf2_rowscroll_r, simpl156_pf2_rowscroll_w)
  	AM_RANGE(0x6f0000, 0x6f0003) AM_READONLY AM_WRITENOP // ?
  	AM_RANGE(0x780000, 0x780003) AM_DEVREADWRITE8("okisfx", okim6295_r, okim6295_w, 0x000000ff)
  ADDRESS_MAP_END
  
  
  /* Mitchell MT5601-0 PCB (prtytime, charlien, osman) */
  static ADDRESS_MAP_START( mitchell156_map, ADDRESS_SPACE_PROGRAM, 32 )
  	AM_RANGE(0x000000, 0x07ffff) AM_ROM
  	AM_RANGE(0x100000, 0x100003) AM_DEVREADWRITE8("okisfx", okim6295_r, okim6295_w, 0x000000ff)
  	AM_RANGE(0x140000, 0x140003) AM_DEVREADWRITE8("okimusic", okim6295_r, okim6295_w, 0x000000ff)
  	AM_RANGE(0x180000, 0x187fff) AM_READWRITE(simpl156_mainram_r, simpl156_mainram_w) AM_BASE_MEMBER(simpl156_state, mainram) // main ram
  	AM_RANGE(0x190000, 0x191fff) AM_READWRITE(simpl156_spriteram_r, simpl156_spriteram_w) AM_BASE_SIZE_GENERIC(spriteram)
  	AM_RANGE(0x1a0000, 0x1a0fff) AM_READWRITE(simpl156_palette_r,simpl156_palette_w)
  	AM_RANGE(0x1b0000, 0x1b0003) AM_READWRITE(simpl156_system_r,simpl156_eeprom_w)
  	AM_RANGE(0x1c0000, 0x1c001f) AM_DEVREADWRITE("deco_custom", deco16ic_pf12_control_dword_r, deco16ic_pf12_control_dword_w)
  	AM_RANGE(0x1d0000, 0x1d1fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x1d2000, 0x1d3fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf1_data_dword_r, deco16ic_pf1_data_dword_w)
  	AM_RANGE(0x1d4000, 0x1d5fff) AM_DEVREADWRITE("deco_custom", deco16ic_pf2_data_dword_r, deco16ic_pf2_data_dword_w)
  	AM_RANGE(0x1e0000, 0x1e1fff) AM_READWRITE(simpl156_pf1_rowscroll_r, simpl156_pf1_rowscroll_w)
  	AM_RANGE(0x1e4000, 0x1e5fff) AM_READWRITE(simpl156_pf2_rowscroll_r, simpl156_pf2_rowscroll_w)
  	AM_RANGE(0x1f0000, 0x1f0003) AM_READONLY AM_WRITENOP // ?
  	AM_RANGE(0x200000, 0x200003) AM_READ(simpl156_inputs_read)
  	AM_RANGE(0x201000, 0x201fff) AM_RAM AM_BASE_MEMBER(simpl156_state, systemram) // work ram (32-bit)
  ADDRESS_MAP_END
  
  
  static const gfx_layout tile_8x8_layout =
  {
  	8,8,
  	RGN_FRAC(1,2),
  	4,
  	{ RGN_FRAC(1,2)+8,RGN_FRAC(1,2)+0,RGN_FRAC(0,2)+8,RGN_FRAC(0,2)+0 },
  	{ 0, 1, 2, 3, 4, 5, 6, 7 },
  	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
  	8*16
  };
  
  static const gfx_layout tile_16x16_layout =
  {
  	16,16,
  	RGN_FRAC(1,2),
  	4,
  	{ RGN_FRAC(1,2)+8,RGN_FRAC(1,2)+0,RGN_FRAC(0,2)+8,RGN_FRAC(0,2)+0 },
  	{ 256,257,258,259,260,261,262,263,0, 1, 2, 3, 4, 5, 6, 7 },
  	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16,8*16,9*16,10*16,11*16,12*16,13*16,14*16,15*16 },
  	32*16
  };
  
  static const gfx_layout spritelayout =
  {
  	16,16,
  	RGN_FRAC(1,1),
  	4,
  	{ 24,8,16,0 },
  	{ 512,513,514,515,516,517,518,519, 0, 1, 2, 3, 4, 5, 6, 7 },
  	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32,
  	  8*32, 9*32,10*32,11*32,12*32,13*32,14*32,15*32},
  	32*32
  };
  
  static GFXDECODE_START( simpl156 )
  	GFXDECODE_ENTRY( "gfx1", 0, tile_8x8_layout,     0,     32 )	/* Tiles (8x8) */
  	GFXDECODE_ENTRY( "gfx1", 0, tile_16x16_layout,   0,     32 )	/* Tiles (16x16) */
  	GFXDECODE_ENTRY( "gfx2", 0, spritelayout, 0x200, 32)	/* Sprites (16x16) */
  
  GFXDECODE_END
  
  static INTERRUPT_GEN( simpl156_vbl_interrupt )
  {
  	cpu_set_input_line(device, ARM_IRQ_LINE, HOLD_LINE);
  }
  
  
  static int simpl156_bank_callback(const int bank)
  {
  	return ((bank >> 4) & 0x7) * 0x1000;
  }
  
  static const deco16ic_interface simpl156_deco16ic_intf =
  {
  	"screen",
  	1, 0, 1,
  	0x0f, 0x0f, 0x0f, 0x0f,	/* trans masks (default values) */
  	0, 16, 0, 16, /* color base (default values) */
  	0x0f, 0x0f, 0x0f, 0x0f,	/* color masks (default values) */
  	simpl156_bank_callback,
  	simpl156_bank_callback,
  	NULL,
  	NULL
  };
  
  static MACHINE_DRIVER_START( chainrec )
  
  	/* driver data */
  	MDRV_DRIVER_DATA(simpl156_state)
  
  	/* basic machine hardware */
  	MDRV_CPU_ADD("maincpu", ARM, 28000000 /* /4 */)	/*DE156*/ /* 7.000 MHz */ /* measured at 7.. seems to need 28? */
  	MDRV_CPU_PROGRAM_MAP(chainrec_map)
  	MDRV_CPU_VBLANK_INT("screen", simpl156_vbl_interrupt)
  
  	MDRV_EEPROM_93C46_ADD("eeprom")  // 93C45
  
  	/* video hardware */
  	MDRV_SCREEN_ADD("screen", RASTER)
  	MDRV_SCREEN_REFRESH_RATE(58)
  	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(800))
  	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_PALETTE_LENGTH(4096)
  	MDRV_GFXDECODE(simpl156)
  	MDRV_VIDEO_START(simpl156)
  	MDRV_VIDEO_UPDATE(simpl156)
  
  	MDRV_DECO16IC_ADD("deco_custom", simpl156_deco16ic_intf)
  
  	MDRV_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
  
  	MDRV_OKIM6295_ADD("okisfx", 32220000/32, OKIM6295_PIN7_HIGH)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.6)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.6)
  
  	MDRV_OKIM6295_ADD("okimusic", 32220000/16, OKIM6295_PIN7_HIGH)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.2)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.2)
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( magdrop )
  	/* basic machine hardware */
  	MDRV_IMPORT_FROM(chainrec)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(magdrop_map)
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( magdropp )
  	/* basic machine hardware */
  	MDRV_IMPORT_FROM(chainrec)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(magdropp_map)
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( joemacr )
  	/* basic machine hardware */
  	MDRV_IMPORT_FROM(chainrec)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(joemacr_map)
  MACHINE_DRIVER_END
  
  static MACHINE_DRIVER_START( mitchell156 )
  	/* basic machine hardware */
  	MDRV_IMPORT_FROM(chainrec)
  	MDRV_CPU_MODIFY("maincpu")
  	MDRV_CPU_PROGRAM_MAP(mitchell156_map)
  
  	MDRV_OKIM6295_REPLACE("okimusic", 32220000/32, OKIM6295_PIN7_HIGH)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.2)
  	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.2)
  MACHINE_DRIVER_END
  
  
  /*
  
  Joe and Mac Returns
  Data East 1994
  
  This is a higher quality bootleg made with genuine DECO chips/parts.
  
  +-------------------------------+
  |        07.u46           04.u12|
  | VOL  M6296 M6295    52  03.u11|
  |J  06.u45      62256           |
  |A              62256     02.u8h|
  |M    PAL  141            01.u8l|
  |M     62256                    |
  |A 223 62256  PAL  28MHz        |
  |             62256         156 |
  |  SW1        62256   223       |
  |      93C45  05.u29            |
  +-------------------------------+
  
  All roms are socketted eproms, no labels, just a number in pencel.
  
  05.u29  27c4096
  01.u8l  27c4096
  02.u8h  27c4096
  03.u11  27c4096
  04.u12  27c4096
  06.u45  27c160
  07.u46  27c020
  
  */
  
  ROM_START( joemacr )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "05.u29",    0x000000, 0x080000,  CRC(74e9a158) SHA1(eee447303ac0884e152b89f59a9694afade87336) )
  
  	ROM_REGION( 0x100000, "gfx1", 0 )
  	ROM_LOAD( "01.u8l",    0x000000, 0x080000,  CRC(4da4a2c1) SHA1(1ed4bd4337d8b185b56e326e662a8715e4d09e17) )
  	ROM_LOAD( "02.u8h",    0x080000, 0x080000,  CRC(642c08db) SHA1(9a541fd56ae34c24f803e08869702be6fafd81d1) )
  
  	ROM_REGION( 0x100000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mbn01",    0x000001, 0x080000, CRC(a3a37353) SHA1(c4509c8268afb647c20e71b42ae8ebd2bdf075e6) ) /* 03.u11 */
  	ROM_LOAD16_BYTE( "mbn02",    0x000000, 0x080000, CRC(aa2230c5) SHA1(43b7ac5c69cde1840a5255a8897e1c5d5f89fd7b) ) /* 04.u12 */
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "mbn04",    0x00000, 0x40000,  CRC(dcbd4771) SHA1(2a1ab6b0fc372333c7eb17aab077fe1ca5ba1dea) ) /* 07.u46 */
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mbn03",    0x00000, 0x200000, CRC(70b71a2a) SHA1(45851b0692de73016fc9b913316001af4690534c) ) /* 06.u45 */
  ROM_END
  
  /*
  
  Joe and Mac Returns
  Data East 1994
  
  DE-0491-1
  
  156         MW00
        223              223
               141
  
    MBN00
  
    MBN01   52   MBN03  M6295
    MBN02        MBN04  M6295
  
  */
  
  ROM_START( joemacra )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "mw00",    0x000000, 0x080000,  CRC(e1b78f40) SHA1(e611c317ada5a049a5e05d69c051e22a43fa2845) )
  
  	ROM_REGION( 0x100000, "gfx1", 0 ) // rebuilt with roms from other set
  	ROM_LOAD( "mbn00",    0x000000, 0x100000, CRC(11b2dac7) SHA1(71a50f606caddeb0ef266e2d3df9e429a4873f21) )
  
  	ROM_REGION( 0x100000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mbn01",    0x000001, 0x080000, CRC(a3a37353) SHA1(c4509c8268afb647c20e71b42ae8ebd2bdf075e6) )
  	ROM_LOAD16_BYTE( "mbn02",    0x000000, 0x080000, CRC(aa2230c5) SHA1(43b7ac5c69cde1840a5255a8897e1c5d5f89fd7b) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "mbn04",    0x00000, 0x40000,  CRC(dcbd4771) SHA1(2a1ab6b0fc372333c7eb17aab077fe1ca5ba1dea) )
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mbn03",    0x00000, 0x200000, CRC(70b71a2a) SHA1(45851b0692de73016fc9b913316001af4690534c) )
  ROM_END
  
  /*
  
  Chain Reaction
  Data East 1995
  
  DEC-22VO
  DE-0409-1
  
  156           E1
         223    2063     93C45
                2063
                                223
                 141
         28MHz         5864
                       5864
              6264
              6264
    MCC-00
  
    U5* U6*    52      MCC-03   AD-65
    U3* U4*            MCC-04   AD-65
  
  * NOTE: These 4 roms are on a sub-board connecting through mcc-01 & mcc-02 sockets
  
  */
  
  ROM_START( chainrec )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "e1",    0x000000, 0x080000, CRC(8a8340ef) SHA1(4aaee56127b73453b862ff2a33dc241eeabf5658) ) /* No DECO ID number on label */
  
  	ROM_REGION( 0x100000, "gfx1", 0 )
  	ROM_LOAD( "mcc-00",    0x000000, 0x100000, CRC(646b03ec) SHA1(9a2fc11b1575032b5a784d88c3a90913068d1e69) )
  
  	ROM_REGION( 0x200000, "gfx2", 0 )
  	ROM_LOAD32_BYTE( "u3",    0x000000, 0x080000, CRC(92659721) SHA1(b446ce98ec9c2c16375ef00639cfb463b365b8f7) ) /* No DECO ID numbers on labels */
  	ROM_LOAD32_BYTE( "u4",    0x000002, 0x080000, CRC(e304eb32) SHA1(61a647ec89695a6b25ff924bdc6d29cbd7aca82b) )
  	ROM_LOAD32_BYTE( "u5",    0x000001, 0x080000, CRC(1b6f01ea) SHA1(753fc670707432e317d035b09b0bad0762fea731) )
  	ROM_LOAD32_BYTE( "u6",    0x000003, 0x080000, CRC(531a56f2) SHA1(89602bb873a3b110bffc216f921ba228e53380f9) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "mcc-04",    0x00000, 0x40000,  CRC(86ee6ade) SHA1(56ad3f432c7f430f19fcba7c89940c63da165906) )
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mcc-03",    0x00000, 0x100000, CRC(da2ebba0) SHA1(96d31dea4c7226ee1d386b286919fa334388c7a1) )
  
  	ROM_REGION16_BE( 0x80, "eeprom", 0 ) /* eeprom */
  	ROM_LOAD16_WORD( "eeprom-chainrec.bin", 0x00, 0x80, CRC(b6da3fbf) SHA1(bdc2bdeabf8686c1454737faf785b0d7501f9bde) )
  ROM_END
  
  /*
  
  Magical Drop / Magical Drop Plus 1
  Data East 1995
  
  DE-0409-1
  
  156           E1
         223    2063     93C45
                2063
                                223
                 141
         28MHz         5864
                       5864
              6264
              6264
    MCC-00
  
    mcc-01     52      MCC-03   AD-65
    mcc-02             MCC-04   AD-65
  
  
  */
  
  ROM_START( magdrop )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "re00-2.e1",    0x000000, 0x080000,  CRC(7138f10f) SHA1(ca93c3c2dc9a7dd6901c8429a6bf6883076a9b8f) )
  
  	ROM_REGION( 0x100000, "gfx1", 0 )
  	ROM_LOAD( "mcc-00",    0x000000, 0x100000, CRC(646b03ec) SHA1(9a2fc11b1575032b5a784d88c3a90913068d1e69) )
  
  	ROM_REGION( 0x200000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mcc-01.a13",    0x000001, 0x100000, CRC(13d88745) SHA1(0ce4ec1481f31be860ee80322de6e32f9a566229) )
  	ROM_LOAD16_BYTE( "mcc-02.a14",    0x000000, 0x100000, CRC(d0f97126) SHA1(3848a6f00d0e57aaf383298c4d111eb63a88b073) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "mcc-04",    0x00000, 0x40000,  CRC(86ee6ade) SHA1(56ad3f432c7f430f19fcba7c89940c63da165906) )
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mcc-03",    0x00000, 0x100000, CRC(da2ebba0) SHA1(96d31dea4c7226ee1d386b286919fa334388c7a1) )
  
  	ROM_REGION16_BE( 0x80, "eeprom", 0 ) /* eeprom */
  	ROM_LOAD16_WORD_SWAP( "93c45.2h",    0x00, 0x80, CRC(16ce8d2d) SHA1(1a6883c75d34febbd92a16cfe204ff12550c85fd) )
  ROM_END
  
  ROM_START( magdropp )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "rz00-1.e1",    0x000000, 0x080000,  CRC(28caf639) SHA1(a17e792c82e65009e21680094acf093c0c4f1021) )
  
  	ROM_REGION( 0x100000, "gfx1", 0 )
  	ROM_LOAD( "mcc-00",    0x000000, 0x100000, CRC(646b03ec) SHA1(9a2fc11b1575032b5a784d88c3a90913068d1e69) )
  
  	ROM_REGION( 0x200000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mcc-01.a13",    0x000001, 0x100000, CRC(13d88745) SHA1(0ce4ec1481f31be860ee80322de6e32f9a566229) )
  	ROM_LOAD16_BYTE( "mcc-02.a14",    0x000000, 0x100000, CRC(d0f97126) SHA1(3848a6f00d0e57aaf383298c4d111eb63a88b073) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "mcc-04",    0x00000, 0x40000,  CRC(86ee6ade) SHA1(56ad3f432c7f430f19fcba7c89940c63da165906) )
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mcc-03",    0x00000, 0x100000, CRC(da2ebba0) SHA1(96d31dea4c7226ee1d386b286919fa334388c7a1) )
  
  	ROM_REGION16_BE( 0x80, "eeprom", 0 ) /* eeprom */
  	ROM_LOAD16_WORD_SWAP( "eeprom.2h",    0x00, 0x80, CRC(d13d9edd) SHA1(e98ee2b696f0a7a8752dc30ef8b41bfe6598cbe4) )
  ROM_END
  
  /*
  
  Charlie Ninja
  (c)1995 Mitchell Corp.
  
  DEC-22VO (board is manufactured by DECO)
  MT5601-0
  ------------------------------------------------------------
  |                 MBR03.14H                    MBR-01.14A  |
  |                                                          |
  |     OKI M6295   ND01-0.13H            52                 |
  |                                                          |
  --|   OKI M6295    MBR02.12F                               |
    |                                                        |
  --|                               CY7C185-25   MBR-00.9A   |
  |                                 CY7C185-25               |
  |                                                          |
  |                                                          |
  |J                     GAL16V8           28.000MHz         |
  |A                  CY7C185-25                             |
  |M                  CY7C185-25     141                     |
  |M                                                         |
  |A          223                                            |
  |                                             GAL16V8      |
  |                                GAL16V8                   |
  |                             CY7C185-25   223             |
  --|                93C45.2H   CY7C185-25                   |
    |                                                  156   |
  --| TESTSW                  ND00-1.1E                      |
  |                                                          |
  ------------------------------------------------------------
  
  eprom 1e   27c4002  labeled ND 00-1
  eprom 13h  27c2001  labeled ND 01-0
  
  maskrom 14a  27c800  labeled MBR-01
  maskrom 14h  27c800  labeled MBR-03
  maskrom 12f  27c800  labeled MBR-02
  maskrom 9a   27c160  labeled MBR-00
  
  */
  
  ROM_START( charlien )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "nd00-1.1e",    0x000000, 0x080000,  CRC(f18f4b23) SHA1(cb0c159b4dde3a3c5f295f270485996811e5e4d2) )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "mbr-00.9a",    0x000000, 0x080000, CRC(ecf2c7f0) SHA1(3c735a4eef2bc49f16ac9365a5689101f43c13e9) )
  	ROM_CONTINUE( 0x100000, 0x080000)
  	ROM_CONTINUE( 0x080000, 0x080000)
  	ROM_CONTINUE( 0x180000, 0x080000)
  
  	ROM_REGION( 0x200000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mbr-01.14a",    0x000001, 0x100000, CRC(46c90215) SHA1(152acdeea34ec1db3f761066a0c1ff6e43e47f9d) )
  	ROM_LOAD16_BYTE( "mbr-03.14h",    0x000000, 0x100000, CRC(c448a68a) SHA1(4b607dfee269abdfeb710b74b73ef87dc2b30e8c) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "nd01-0.13h",    0x00000, 0x40000,  CRC(635a100a) SHA1(f6ec70890892e7557097ccd519de37247bb8c98d) )
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mbr-02.12f",    0x00000, 0x100000, CRC(4f67d333) SHA1(608f921bfa6b7020c0ce72e5229b3f1489208b23) ) // 00, 01, 04, 05
  ROM_END
  
  
  /*
  
  Party Time: Gonta the Diver II / Ganbare! Gonta!! 2
  (c)1995 Mitchell Corp.
  
  DEC-22VO (board is manufactured by DECO)
  MT5601-0
  ------------------------------------------------------------
  |                 MCB05.14H     MCB-03.14D     MCB-02.14A  |
  |                                                          |
  |     OKI M6295   PZ01-0.13H            52     MCB-01.13A  |
  |                                                          |
  --|   OKI M6295    MCB04.12F                               |
    |                                                        |
  --|                               CY7C185-25   MCB-00.9A   |
  |                                 CY7C185-25               |
  |                                                          |
  |                                                          |
  |J                     GAL16V8           28.000MHz         |
  |A                  CY7C185-25                             |
  |M                  CY7C185-25     141                     |
  |M                                                         |
  |A          223                                            |
  |                                             GAL16V8      |
  |                                GAL16V8                   |
  |                             CY7C185-25   223             |
  --|                93C45.2H   CY7C185-25                   |
    |                                                  156   |
  --| TESTSW                  PZ00-0.1E                      |
  |                                                          |
  ------------------------------------------------------------
  
  CPU  : DECO 156 100pin PQFP custom encrypted ARM
  Sound: M6295x2
  OSC  : 28.0000MHz
  
  ROMs:
  pz_00-0.1e - Main program (27c4096) Party Time: Gonta the Diver II
  rd_00-0.1e - Main program (27c4096) Ganbare! Gonta!! 2
  
  mcb-00.9a  - Graphics (23c16000)
  
  mcb-01.13a - Graphics (23c16000)
  mcb-02.14a |
  mcb-03.14d |
  mcb-05.14h /
  
  pz_01-0.13h - Samples (27c020) Party Time: Gonta the Diver II
  rd_01-0.13h - Samples (27c020) Ganbare! Gonta!! 2
  
  mcb-04.12f - Samples (23c16000)
  
  GALs (16V8B, not dumped):
  vz-00.5c
  vz-01.4e
  vz-02.8f
  
  */
  
  ROM_START( prtytime )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "pz_00-0.1e",    0x000000, 0x080000, CRC(ec715c87) SHA1(c9f28399d59b37977f31a5c67cb97af6c58947ae) )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "mcb-00.9a",    0x000000, 0x080000, CRC(c48a4f2b) SHA1(2dee5f8507b2a7e6f7e44b14f9abca36d0ebf78b) )
  	ROM_CONTINUE( 0x100000, 0x080000)
  	ROM_CONTINUE( 0x080000, 0x080000)
  	ROM_CONTINUE( 0x180000, 0x080000)
  
  	ROM_REGION( 0x800000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mcb-02.14a",    0x000001, 0x200000, CRC(423cfb38) SHA1(b8c772a8ab471c365a11a88c85e1c8c7d2ad6e80) )
  	ROM_LOAD16_BYTE( "mcb-05.14h",    0x000000, 0x200000, CRC(81540cfb) SHA1(6f7bc62c3c4d4a29eb1e0cfb261ace461bbca57c) )
  	ROM_LOAD16_BYTE( "mcb-01.13a",    0x400001, 0x200000, CRC(06f40a57) SHA1(896f1d373e911dcff7223bf21756ad35b28b4c5d) )
  	ROM_LOAD16_BYTE( "mcb-03.14d",    0x400000, 0x200000, CRC(0aef73af) SHA1(76cf13f53da5202da80820f98660edee1eef7f1a) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "pz_01-0.13h",    0x00000, 0x40000,  CRC(8925bce2) SHA1(0ff2d5db7a24a2af30bd753eba274572c32cc2e7) )
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mcb-04.12f",    0x00000, 0x200000, CRC(e23d3590) SHA1(dc8418edc525f56e84f26e9334d5576000b14e5f) )
  
  	ROM_REGION16_BE( 0x80, "eeprom", 0 ) /* eeprom */
  	ROM_LOAD16_WORD( "eeprom-prtytime.bin", 0x00, 0x80, CRC(105700da) SHA1(650d11236c5692c1454d7b823d5be4d3278d6576) )
  ROM_END
  
  ROM_START( gangonta )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "rd_00-0.1e",    0x000000, 0x080000, CRC(f80f43bb) SHA1(f9d26829eb90d41a6c410d4d673fe9595f814868) )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "mcb-00.9a",    0x000000, 0x080000, CRC(c48a4f2b) SHA1(2dee5f8507b2a7e6f7e44b14f9abca36d0ebf78b) )
  	ROM_CONTINUE( 0x100000, 0x080000)
  	ROM_CONTINUE( 0x080000, 0x080000)
  	ROM_CONTINUE( 0x180000, 0x080000)
  
  	ROM_REGION( 0x800000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mcb-02.14a",    0x000001, 0x200000, CRC(423cfb38) SHA1(b8c772a8ab471c365a11a88c85e1c8c7d2ad6e80) )
  	ROM_LOAD16_BYTE( "mcb-05.14h",    0x000000, 0x200000, CRC(81540cfb) SHA1(6f7bc62c3c4d4a29eb1e0cfb261ace461bbca57c) )
  	ROM_LOAD16_BYTE( "mcb-01.13a",    0x400001, 0x200000, CRC(06f40a57) SHA1(896f1d373e911dcff7223bf21756ad35b28b4c5d) )
  	ROM_LOAD16_BYTE( "mcb-03.14d",    0x400000, 0x200000, CRC(0aef73af) SHA1(76cf13f53da5202da80820f98660edee1eef7f1a) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "rd_01-0.13h",    0x00000, 0x40000,  CRC(70fd18c6) SHA1(368cd8e10c5f5a13eb3813974a7e6b46a4fa6b6c) )
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mcb-04.12f",    0x00000, 0x200000, CRC(e23d3590) SHA1(dc8418edc525f56e84f26e9334d5576000b14e5f) )
  
  	ROM_REGION16_BE( 0x80, "eeprom", 0 ) /* eeprom */
  	ROM_LOAD16_WORD( "eeprom-gangonta.bin", 0x00, 0x80, CRC(27ba60a5) SHA1(1f65be84cfecda5545e7083bcea9db1681425279) )
  ROM_END
  
  /*
  
  Osman / Cannon Dancer
  (c)1996 Mitchell Corp.
  
  The game is very similar to Strider as it was programmed by some of the same programmers.
  
  PCB Layout
  ----------
  
  DEC-22VO (board is manufactured by DECO)
  MT5601-0
  ------------------------------------------------------------
  |                 MCF04.14H     MCF-03.14D     MCF-02.14A  |
  |                                                          |
  |     OKI M6295   SA01-0.13H            52     MCF-01.13A  |
  |                                                          |
  --|   OKI M6295    MCF05.12F                               |
    |                                                        |
  --|                               CY7C185-25   MCF-00.9A   |
  |                                 CY7C185-25               |
  |                                                          |
  |                                                          |
  |J                     GAL16V8           28.000MHz         |
  |A                  CY7C185-25                             |
  |M                  CY7C185-25     141                     |
  |M                                                         |
  |A          223                                            |
  |                                             GAL16V8      |
  |                                GAL16V8                   |
  |                             CY7C185-25   223             |
  --|                93C45.2H   CY7C185-25                   |
    |                                                  156   |
  --| TESTSW                  SA00-0.1E                      |
  |                                                          |
  ------------------------------------------------------------
  
  */
  
  ROM_START( osman )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "sa00-0.1e",    0x000000, 0x080000, CRC(ec6b3257) SHA1(10a42a680ce122ab030eaa2ccd99d302cb77854e) )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "mcf-00.9a",    0x000000, 0x080000, CRC(247712dc) SHA1(bcb765afd7e756b68131c97c30d210de115d6b50) )
  	ROM_CONTINUE( 0x100000, 0x080000)
  	ROM_CONTINUE( 0x080000, 0x080000)
  	ROM_CONTINUE( 0x180000, 0x080000)
  
  	ROM_REGION( 0x800000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mcf-02.14a",    0x000001, 0x200000, CRC(21251b33) SHA1(d252fe5c6eef8cbc9327e4176b4868b1cb17a738) )
  	ROM_LOAD16_BYTE( "mcf-04.14h",    0x000000, 0x200000, CRC(4fa55577) SHA1(e229ba9cce46b92ce255aa33b974e19b214c4017) )
  	ROM_LOAD16_BYTE( "mcf-01.13a",    0x400001, 0x200000, CRC(83881e25) SHA1(ae82cf0f704e6efea94c6c1d276d4e3e5b3ebe43) )
  	ROM_LOAD16_BYTE( "mcf-03.14d",    0x400000, 0x200000, CRC(faf1d51d) SHA1(675dbbfe15b8010d54b2b3af26d42cdd753c2ce2) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "sa01-0.13h",    0x00000, 0x40000,  CRC(cea8368e) SHA1(1fcc641381fdc29bd50d3a4b23e67647f79e505a))
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mcf-05.12f",    0x00000, 0x200000, CRC(f007d376) SHA1(4ba20e5dabeacc3278b7f30c4462864cbe8f6984) )
  
  	ROM_REGION16_BE( 0x80, "eeprom", 0 ) /* eeprom */
  	ROM_LOAD16_WORD( "eeprom-osman.bin", 0x00, 0x80, CRC(509552b2) SHA1(b506692180ccd67f6ad48503a36ebfc4819817b1) )
  ROM_END
  
  /* NOTE: Cannon Dancer uses IDENTICAL roms to Osman. Region is contained in the eeprom settings which we set in the INIT function */
  
  ROM_START( candance )
  	ROM_REGION( 0x80000, "maincpu", 0 ) /* DE156 code (encrypted) */
  	ROM_LOAD( "sa00-0.1e",    0x000000, 0x080000, CRC(ec6b3257) SHA1(10a42a680ce122ab030eaa2ccd99d302cb77854e) )
  
  	ROM_REGION( 0x200000, "gfx1", 0 )
  	ROM_LOAD( "mcf-00.9a",    0x000000, 0x080000, CRC(247712dc) SHA1(bcb765afd7e756b68131c97c30d210de115d6b50) )
  	ROM_CONTINUE( 0x100000, 0x080000)
  	ROM_CONTINUE( 0x080000, 0x080000)
  	ROM_CONTINUE( 0x180000, 0x080000)
  
  	ROM_REGION( 0x800000, "gfx2", 0 )
  	ROM_LOAD16_BYTE( "mcf-02.14a",    0x000001, 0x200000, CRC(21251b33) SHA1(d252fe5c6eef8cbc9327e4176b4868b1cb17a738) )
  	ROM_LOAD16_BYTE( "mcf-04.14h",    0x000000, 0x200000, CRC(4fa55577) SHA1(e229ba9cce46b92ce255aa33b974e19b214c4017) )
  	ROM_LOAD16_BYTE( "mcf-01.13a",    0x400001, 0x200000, CRC(83881e25) SHA1(ae82cf0f704e6efea94c6c1d276d4e3e5b3ebe43) )
  	ROM_LOAD16_BYTE( "mcf-03.14d",    0x400000, 0x200000, CRC(faf1d51d) SHA1(675dbbfe15b8010d54b2b3af26d42cdd753c2ce2) )
  
  	ROM_REGION( 0x80000, "okisfx", 0 ) /* Oki samples */
  	ROM_LOAD( "sa01-0.13h",    0x00000, 0x40000,  CRC(cea8368e) SHA1(1fcc641381fdc29bd50d3a4b23e67647f79e505a))
  
  	ROM_REGION( 0x200000, "okimusic", 0 ) /* samples? (banked?) */
  	ROM_LOAD( "mcf-05.12f",    0x00000, 0x200000, CRC(f007d376) SHA1(4ba20e5dabeacc3278b7f30c4462864cbe8f6984) )
  
  	ROM_REGION16_BE( 0x80, "eeprom", 0 ) /* eeprom */
  	ROM_LOAD16_WORD( "eeprom-candance.bin", 0x00, 0x80, CRC(0a0a8f6b) SHA1(4e07138ba7d615291c67162958c889540615e06f) )
  ROM_END
  
  
  /*
    Cannon Dancer / Osman are odd, they don't init their own Eeprom...
    Roms on boths games are identical, and the Eeprom contains several settings the user isn't
    permitted to change, including region and button config..  the first 2 bytes must match the
    last first 2 bytes in the last block of 8 bytes, and the at 0x20 there must be 0088 or the
    game won't boot
  
    The second byte of Eeprom contains the following
  
    (Switch 0 in test mode)
  
     -bss llfr (byte 0x01 / 0x79 of eeprom)
  
    *- = unknown / unused  (no observed effect)
    *b = button config (2 buttons, or 3 buttons)
     s = number of special weapons (bombs)
     l = lives
     f = flip (screen rotation)
    *r = region
  
  
    other settings
  
    Switch 1  (byte 0x00 / 0x78 of eeprom)
  
    ppdd -ecs
  
    p = number of players (health bar?)
    d = difficulty
   *- = unknown / unused  (no observed effect)
    e = extend score
    c = continue
    s = demo sound
  
   Switch 2  (byte 0x7d of eeprom)
  
    cccC CCxb
  
    ccc = coin1
    CCC = coin 2
   *x = breaks attract mode / game..
    b = blood
  
  
    items marked * the user can't configure in test mode
  
    I don't know if any of the other bytes in the eeprom are tested / used.
  
    1 in eeprom is 0 in test mode
  
    Both games are currently configured to 3 buttons, its possible the game was never
    released with a 2 button configuration.
  
     NOTE: an actual read of the eeprom appears to be byteswapped vs. this data / the file
           MAME outputs
  
  */
  
  
  static DRIVER_INIT( simpl156 )
  {
  	UINT8 *rom = memory_region(machine, "okimusic");
  	int length = memory_region_length(machine, "okimusic");
  	UINT8 *buf1 = auto_alloc_array(machine, UINT8, length);
  
  	UINT32 x;
  
  	/* hmm low address line goes to banking chip instead? */
  	for (x = 0; x < length; x++)
  	{
  		UINT32 addr;
  
  		addr = BITSWAP24 (x,23,22,21,0, 20,
  		                    19,18,17,16,
  		                    15,14,13,12,
  		                    11,10,9, 8,
  		                    7, 6, 5, 4,
  		                    3, 2, 1 );
  
  		buf1[addr] = rom[x];
  	}
  
  	memcpy(rom, buf1, length);
  
  	auto_free(machine, buf1);
  
  	deco56_decrypt_gfx(machine, "gfx1");
  	deco156_decrypt(machine);
  }
  
  /* Everything seems more stable if we run the CPU speed x4 and use Idle skips.. maybe it has an internal multipler? */
  static READ32_HANDLER( joemacr_speedup_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	if (cpu_get_pc(space->cpu) == 0x284)
  		cpu_spinuntil_time(space->cpu, ATTOTIME_IN_USEC(400));
  	return state->systemram[0x18/4];
  }
  
  
  static DRIVER_INIT( joemacr )
  {
  	memory_install_read32_handler(cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0x0201018, 0x020101b, 0, 0, joemacr_speedup_r );
  	DRIVER_INIT_CALL(simpl156);
  }
  
  static READ32_HANDLER( chainrec_speedup_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	if (cpu_get_pc(space->cpu) == 0x2d4)
  		cpu_spinuntil_time(space->cpu, ATTOTIME_IN_USEC(400));
  	return state->systemram[0x18/4];
  }
  
  static DRIVER_INIT( chainrec )
  {
  	memory_install_read32_handler(cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0x0201018, 0x020101b, 0, 0, chainrec_speedup_r );
  	DRIVER_INIT_CALL(simpl156);
  }
  
  static READ32_HANDLER( prtytime_speedup_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	if (cpu_get_pc(space->cpu) == 0x4f0)
  		cpu_spinuntil_time(space->cpu, ATTOTIME_IN_USEC(400));
  	return state->systemram[0xae0/4];
  }
  
  static DRIVER_INIT( prtytime )
  {
  	memory_install_read32_handler(cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0x0201ae0, 0x0201ae3, 0, 0, prtytime_speedup_r );
  	DRIVER_INIT_CALL(simpl156);
  }
  
  
  static READ32_HANDLER( charlien_speedup_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	if (cpu_get_pc(space->cpu) == 0xc8c8)
  		cpu_spinuntil_time(space->cpu, ATTOTIME_IN_USEC(400));
  	return state->systemram[0x10/4];
  }
  
  static DRIVER_INIT( charlien )
  {
  	memory_install_read32_handler(cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0x0201010, 0x0201013, 0, 0, charlien_speedup_r );
  	DRIVER_INIT_CALL(simpl156);
  }
  
  static READ32_HANDLER( osman_speedup_r )
  {
  	simpl156_state *state = space->machine->driver_data<simpl156_state>();
  	if (cpu_get_pc(space->cpu) == 0x5974)
  		cpu_spinuntil_time(space->cpu, ATTOTIME_IN_USEC(400));
  	return state->systemram[0x10/4];
  }
  
  static DRIVER_INIT( osman )
  {
  	memory_install_read32_handler(cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0x0201010, 0x0201013, 0, 0, osman_speedup_r );
  	DRIVER_INIT_CALL(simpl156);
  
  }
  
  /* Data East games running on the DE-0409-1 or DE-0491-1 PCB */
  GAME( 1994, joemacr,  0,        joemacr,     simpl156, joemacr,  ROT0, "Data East", "Joe & Mac Returns (World, Version 1.1, 1994.05.27)", GAME_SUPPORTS_SAVE ) /* bootleg board with genuine DECO parts */
  GAME( 1994, joemacra, joemacr,  joemacr,     simpl156, joemacr,  ROT0, "Data East", "Joe & Mac Returns (World, Version 1.0, 1994.05.19)", GAME_SUPPORTS_SAVE )
  GAME( 1995, chainrec, 0,        chainrec,    simpl156, chainrec, ROT0, "Data East", "Chain Reaction (World, Version 2.2, 1995.09.25)", GAME_SUPPORTS_SAVE )
  GAME( 1995, magdrop,  chainrec, magdrop,     simpl156, chainrec, ROT0, "Data East", "Magical Drop (Japan, Version 1.1, 1995.06.21)", GAME_SUPPORTS_SAVE )
  GAME( 1995, magdropp, chainrec, magdropp,    simpl156, chainrec, ROT0, "Data East", "Magical Drop Plus 1 (Japan, Version 2.1, 1995.09.12)", GAME_SUPPORTS_SAVE )
  
  /* Mitchell games running on the DEC-22VO / MT5601-0 PCB */
  GAME( 1995, charlien, 0,        mitchell156, simpl156, charlien, ROT0,  "Mitchell", "Charlie Ninja" , GAME_SUPPORTS_SAVE ) /* language in service mode */
  GAME( 1995, prtytime, 0,        mitchell156, simpl156, prtytime, ROT90, "Mitchell", "Party Time: Gonta the Diver II / Ganbare! Gonta!! 2 (World Release)", GAME_SUPPORTS_SAVE ) /* language in service mode */
  GAME( 1995, gangonta, prtytime, mitchell156, simpl156, prtytime, ROT90, "Mitchell", "Ganbare! Gonta!! 2 / Party Time: Gonta the Diver II (Japan Release)", GAME_SUPPORTS_SAVE ) /* language in service mode */
  GAME( 1996, osman,    0,        mitchell156, simpl156, osman,    ROT0,  "Mitchell", "Osman (World)", GAME_SUPPORTS_SAVE )
  GAME( 1996, candance, osman,    mitchell156, simpl156, osman,    ROT0,  "Mitchell (Atlus license)", "Cannon Dancer (Japan)", GAME_SUPPORTS_SAVE )
  