/***************************************************************************

IQ Block   (c) 1992 IGS

Driver by Nicola Salmoria and Ernesto Corvi

TODO:
- Who generates IRQ and NMI? How many should there be per frame?

- Sound chip is a UM3567. Is this compatible to something already in MAME? yes, YM2413

- Coin 2 doesn't work? DIP switch setting?

- Protection:
  I can see it reading things like the R register here and there, so it might
  be cycle-dependant or something.

  'Crash 1' checks I was able to see:
  PC = $52FA
  PC = $507F

  'Crash 2' checks I was able to see:
  PC = $54E6

Stephh's notes :

  - Coin 2 as well as buttons 2 to 4 for each player are only read in "test mode".
    Same issue for Dip Siwtches 0-7 and 1-2 to 1-6.
    Some other games on the same hardware might use them.
  - Dip Switch 0 is stored at 0xf0ac and Dip Switch 1 is stored at 0xf0ad.
    However they are both read back at the same time with "ld   hl,($F0AC)" instructions.
  - Dip Switches 0-0 and 0-1 are read via code at 0x9470.
    This routine is called when you made a "line" after the routine that checks the score
    for awarding extra help and/or changing background.
    Data is coming from 4 possible tables (depending on them) which seem to be 0x84 bytes wide.
    Table 0 offset is 0xeaf7.
    IMO, this has something to do with difficulty but there is no confirmation about that !
  - Dip Switch 1-0 is read only once after the P.O.S.T. via code at 0xa200.
    It changes (or not) the contents of 0xf0db.w which can get these 2 possible values
    at start : 0x47a3 (when OFF) or 0x428e (when ON) which seem to be tables.
    If you set a WP to 0xf0db, you'll notice that it's called more often in the "demo mode"
    when the Dip Switch is ON, so, as it implies writes to outport 0x50b0, I think it has
    something to do with "Demo Sounds".
    I can't tell however if setting the Dip Switch to OFF means "Demo Sounds" OFF or ON !

Grndtour:
 - Title should flash 3X slowly. In MAME it flashes too fast, or strangely??


***************************************************************************/

#include "driver.h"
#include "machine/8255ppi.h"
#include "iqblock.h"
#include "sound/2413intf.h"

static UINT8 *rambase;

static WRITE8_HANDLER( iqblock_prot_w )
{
    rambase[0xe26] = data;
    rambase[0xe27] = data;
    rambase[0xe1c] = data;
}

static WRITE8_HANDLER( grndtour_prot_w )
{
	rambase[0xe39] = data;
    rambase[0xe3a] = data;
    rambase[0xe2f] = data;

}


static INTERRUPT_GEN( iqblock_interrupt )
{
	if (cpu_getiloops() & 1)
		cpunum_set_input_line(0, INPUT_LINE_NMI, PULSE_LINE);	/* ???? */
	else
		cpunum_set_input_line(0, 0, ASSERT_LINE);			/* ???? */
}

static WRITE8_HANDLER( iqblock_irqack_w )
{
	cpunum_set_input_line(0, 0, CLEAR_LINE);
}

static READ8_HANDLER( iqblock_irqack_r )
{
	cpunum_set_input_line(0, 0, CLEAR_LINE);
	return 0;
}

static READ8_HANDLER( extrarom_r )
{
	return memory_region(REGION_USER1)[offset];
}


static WRITE8_HANDLER( port_C_w )
{
	/* bit 4 unknown; it is pulsed at the end of every NMI */

	/* bit 5 seems to be 0 during screen redraw */
	iqblock_videoenable = data & 0x20;

	/* bit 6 is coin counter */
	coin_counter_w(0,data & 0x40);

	/* bit 7 could be a second coin counter, but coin 2 doesn't seem to work... */
}

static const ppi8255_interface ppi8255_intf =
{
	1, 							/* 1 chip */
	{ input_port_0_r },			/* Port A read */
	{ input_port_1_r },			/* Port B read */
	{ input_port_2_r },			/* Port C read */
	{ 0 },						/* Port A write */
	{ 0 },						/* Port B write */
	{ port_C_w },				/* Port C write */
};

static MACHINE_RESET( iqblock )
{
	ppi8255_init(&ppi8255_intf);
}



static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xefff) AM_ROM
	AM_RANGE(0xf000, 0xffff) AM_RAM AM_BASE(&rambase)
ADDRESS_MAP_END


static ADDRESS_MAP_START( main_portmap, ADDRESS_SPACE_IO, 8 )
	AM_RANGE(0x2000, 0x23ff) AM_WRITE(paletteram_xBBBBBGGGGGRRRRR_split1_w)
	AM_RANGE(0x2800, 0x2bff) AM_WRITE(paletteram_xBBBBBGGGGGRRRRR_split2_w)
	AM_RANGE(0x6000, 0x603f) AM_WRITE(iqblock_fgscroll_w)
	AM_RANGE(0x6800, 0x69ff) AM_WRITE(iqblock_fgvideoram_w)	/* initialized up to 6fff... bug or larger tilemap? */
	AM_RANGE(0x7000, 0x7fff) AM_WRITE(iqblock_bgvideoram_w)
	AM_RANGE(0x5080, 0x5083) AM_WRITE(ppi8255_0_w)
	AM_RANGE(0x5080, 0x5083) AM_READ(ppi8255_0_r)
	AM_RANGE(0x5090, 0x5090) AM_READ(input_port_3_r)
	AM_RANGE(0x50a0, 0x50a0) AM_READ(input_port_4_r)
	AM_RANGE(0x50b0, 0x50b0) AM_WRITE(YM2413_register_port_0_w) // UM3567_register_port_0_w
	AM_RANGE(0x50b1, 0x50b1) AM_WRITE(YM2413_data_port_0_w) // UM3567_data_port_0_w
	AM_RANGE(0x50c0, 0x50c0) AM_WRITE(iqblock_irqack_w)
	AM_RANGE(0x7000, 0x7fff) AM_READ(iqblock_bgvideoram_r)
	AM_RANGE(0x8000, 0xffff) AM_READ(extrarom_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START( pokerigs_portmap, ADDRESS_SPACE_IO, 8 )
	AM_RANGE(0x2000, 0x23ff) AM_WRITE(paletteram_xBBBBBGGGGGRRRRR_split1_w)
	AM_RANGE(0x2800, 0x2bff) AM_WRITE(paletteram_xBBBBBGGGGGRRRRR_split2_w)
//  AM_RANGE(0x6000, 0x603f) AM_WRITE(iqblock_fgscroll_w)
//  AM_RANGE(0x6800, 0x69ff) AM_WRITE(iqblock_fgvideoram_w)
	AM_RANGE(0x7000, 0x7fff) AM_WRITE(iqblock_bgvideoram_w)
	AM_RANGE(0x5080, 0x5083) AM_WRITE(ppi8255_0_w)
	AM_RANGE(0x5080, 0x5083) AM_READ(ppi8255_0_r)
	AM_RANGE(0x5090, 0x5090) AM_READ(input_port_3_r) AM_WRITENOP
	AM_RANGE(0x5091, 0x5091) AM_READNOP AM_WRITENOP
	AM_RANGE(0x50a0, 0x50a0) AM_READ(input_port_4_r)
	AM_RANGE(0x50b0, 0x50b0) AM_WRITE(YM2413_register_port_0_w) // UM3567_register_port_0_w
	AM_RANGE(0x50b1, 0x50b1) AM_WRITE(YM2413_data_port_0_w) // UM3567_data_port_0_w
	AM_RANGE(0x50c0, 0x50c0) AM_READ(iqblock_irqack_r)
//  AM_RANGE(0x7000, 0x7fff) AM_READ(iqblock_bgvideoram_r)
//  AM_RANGE(0x8000, 0xffff) AM_READ(extrarom_r)
ADDRESS_MAP_END


static INPUT_PORTS_START( iqblock )
	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 )				// "test mode" only

	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN2 )					// "test mode" only
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL	// "test mode" only

	PORT_START
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON3 )				// "test mode" only
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON4 )				// "test mode" only
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_COCKTAIL	// "test mode" only
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_COCKTAIL	// "test mode" only
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START
	PORT_DIPNAME( 0x03, 0x03, "Unknown SW 0-0&1" )	// Difficulty ? Read notes above
	PORT_DIPSETTING(    0x03, "0" )
	PORT_DIPSETTING(    0x02, "1" )
	PORT_DIPSETTING(    0x01, "2" )
	PORT_DIPSETTING(    0x00, "3" )
	PORT_DIPNAME( 0x0c, 0x0c, "Helps" )
	PORT_DIPSETTING(    0x0c, "1" )
	PORT_DIPSETTING(    0x08, "2" )
	PORT_DIPSETTING(    0x04, "3" )
	PORT_DIPSETTING(    0x00, "4" )
	PORT_DIPNAME( 0x70, 0x70, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x70, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x50, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START
	PORT_DIPNAME( 0x01, 0x00, "Demo Sounds?" )	// To be confirmed ! Read notes above
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Free_Play ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unused ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_SERVICE( 0x80, IP_ACTIVE_LOW )
INPUT_PORTS_END



static const gfx_layout tilelayout1 =
{
	8,8,
	RGN_FRAC(1,3),
	6,
	{ 8, 0, RGN_FRAC(1,3)+8, RGN_FRAC(1,3)+0, RGN_FRAC(2,3)+8, RGN_FRAC(2,3)+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 tilelayout2 =
{
	8,32,
	RGN_FRAC(1,2),
	4,
	{ 8, 0, RGN_FRAC(1,2)+8, RGN_FRAC(1,2)+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, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16,
		16*16, 17*16, 18*16, 19*16, 20*16, 21*16, 22*16, 23*16,
		24*16, 25*16, 26*16, 27*16, 28*16, 29*16, 30*16, 31*16 },
	32*16
};

static const gfx_layout tilelayout3 =
{
	8,32,
	RGN_FRAC(1,3),
	6,
	{ 8, 0, RGN_FRAC(1,3)+8, RGN_FRAC(1,3)+0, RGN_FRAC(2,3)+8, RGN_FRAC(2,3)+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, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16,
		16*16, 17*16, 18*16, 19*16, 20*16, 21*16, 22*16, 23*16,
		24*16, 25*16, 26*16, 27*16, 28*16, 29*16, 30*16, 31*16 },
	32*16
};

static GFXDECODE_START( iqblock )
	GFXDECODE_ENTRY( REGION_GFX1, 0, tilelayout1, 0, 16 )	/* only odd color codes are used */
	GFXDECODE_ENTRY( REGION_GFX2, 0, tilelayout2, 0,  4 )	/* only color codes 0 and 3 used */
GFXDECODE_END

static GFXDECODE_START( cabaret )
	GFXDECODE_ENTRY( REGION_GFX1, 0, tilelayout1, 0, 16 )
	GFXDECODE_ENTRY( REGION_GFX2, 0, tilelayout3, 0, 16 )
GFXDECODE_END


static MACHINE_DRIVER_START( iqblock )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z80,12000000/2)	/* 6 MHz */
	MDRV_CPU_PROGRAM_MAP(main_map,0)
	MDRV_CPU_IO_MAP(main_portmap,0)
	MDRV_CPU_VBLANK_INT(iqblock_interrupt,16)

	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
	MDRV_MACHINE_RESET(iqblock)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(64*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 30*8-1)
	MDRV_GFXDECODE(iqblock)
	MDRV_PALETTE_LENGTH(1024)

	MDRV_VIDEO_START(iqblock)
	MDRV_VIDEO_UPDATE(iqblock)

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD(YM2413, 3579545)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END

static MACHINE_DRIVER_START( cabaret )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z180,12000000/2)	/* 6 MHz , appears to use Z180 instructions */
	MDRV_CPU_PROGRAM_MAP(main_map,0)
	MDRV_CPU_IO_MAP(main_portmap,0)
	MDRV_CPU_VBLANK_INT(iqblock_interrupt,16)

	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
	MDRV_MACHINE_RESET(iqblock)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(64*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 30*8-1)
	MDRV_GFXDECODE(cabaret)
	MDRV_PALETTE_LENGTH(1024)

	MDRV_VIDEO_START(iqblock)
	MDRV_VIDEO_UPDATE(iqblock)

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD(YM2413, 3579545)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END

static MACHINE_DRIVER_START( pokerigs )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z180,12000000/2)	/* 6 MHz */
	MDRV_CPU_PROGRAM_MAP(main_map,0)
	MDRV_CPU_IO_MAP(pokerigs_portmap,0)
	MDRV_CPU_VBLANK_INT(iqblock_interrupt,16)

	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
	MDRV_MACHINE_RESET(iqblock)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(64*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 30*8-1)
	MDRV_GFXDECODE(cabaret)
	MDRV_PALETTE_LENGTH(1024)

	MDRV_VIDEO_START(iqblock)
	MDRV_VIDEO_UPDATE(iqblock)

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD(YM2413, 3579545)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END



/***************************************************************************

  Game driver(s)

***************************************************************************/

ROM_START( iqblock )
	ROM_REGION( 0x20000, REGION_CPU1, 0 )	/* 64k for code + 64K for extra RAM */
	ROM_LOAD( "u7.v5",        0x0000, 0x10000, CRC(811f306e) SHA1(d0aef80f1624002d05721276358f26a3ef69a3f6) )

	ROM_REGION( 0x8000, REGION_USER1, 0 )
	ROM_LOAD( "u8.6",         0x0000, 0x8000, CRC(2651bc27) SHA1(53e1d6ffd78c8a612863b29b0f8734e740d563c7) )	/* background maps, read by the CPU */

	ROM_REGION( 0x60000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "u28.1",        0x00000, 0x20000, CRC(ec4b64b4) SHA1(000e9df0c0b5fcde5ead218dfcdc156bc4be909d) )
	ROM_LOAD( "u27.2",        0x20000, 0x20000, CRC(74aa3de3) SHA1(16757c24765d22026793a0c53d3f24c106951a18) )
	ROM_LOAD( "u26.3",        0x40000, 0x20000, CRC(2896331b) SHA1(51eba9f9f653a11cb96c461ab495d943d34cedc6) )

	ROM_REGION( 0x8000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "u25.4",        0x0000, 0x4000, CRC(8fc222af) SHA1(ac1fb5e6caec391a76e3af51e133aecc65cd5aed) )
	ROM_LOAD( "u24.5",        0x4000, 0x4000, CRC(61050e1e) SHA1(1f7185b2a5a2e237120276c95344744b146b4bf6) )
ROM_END

ROM_START( grndtour )
	ROM_REGION( 0x20000, REGION_CPU1, 0 )	/* 64k for code + 64K for extra RAM */
	ROM_LOAD( "grand7.u7",        0x0000, 0x10000, CRC(95cac31e) SHA1(47bbcce6981ea3d38e0aa49ccd3762a4529f3c96) )

	ROM_REGION( 0x8000, REGION_USER1, 0 )
	ROM_LOAD( "grand6.u8",         0x0000, 0x8000, CRC(4c634b86) SHA1(c36df147187bc526f2348bc2f4d4c4e35bb45f38) )	/* background maps, read by the CPU */

	ROM_REGION( 0xc0000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "grand1.u28",        0x00000, 0x40000, CRC(de85c664) SHA1(3a4b0cac88a0fea1c80541fe49c799e3550bedee) )
	ROM_LOAD( "grand2.u27",        0x40000, 0x40000, CRC(8456204e) SHA1(b604d501f360670f57b937ad96af64c1c2038ef7) )
	ROM_LOAD( "grand3.u26",        0x80000, 0x40000, CRC(77632917) SHA1(d91eadec2e0fb3082299362d18814b8ec4c5e068) )

	ROM_REGION( 0x8000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "grand4.u25",        0x0000, 0x4000, CRC(48d09746) SHA1(64669f572b9a98b078ee1ea0b614c117e5dfbec9) )
	ROM_LOAD( "grand5.u24",        0x4000, 0x4000, CRC(f896efb2) SHA1(8dc8546e363b4ff80983e3b8e2a19ebb7ff30c7b) )
ROM_END

ROM_START( cabaret )
	ROM_REGION( 0x20000, REGION_CPU1, 0 )	/* 64k for code + 64K for extra RAM */
	ROM_LOAD( "cg-8v204.u97",  0x0000, 0x10000, CRC(44cebf77) SHA1(e3f4e4abf41388f0eed50cf9a0fd0b14aa2f8b93) )

	ROM_REGION( 0x8000, REGION_USER1, 0 )
	ROM_LOAD( "cg-7.u98",  0x0000, 0x8000, CRC(b93ae6f8) SHA1(accb87045c278d5d79fff65bb763aa6e8025a945) )	/* background maps, read by the CPU */

	ROM_REGION( 0x60000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "cg-4.u43",  0x00000, 0x20000, CRC(e509f50a) SHA1(7e68ca54642c92cdb348d5cf9466065938d0e027) )
	ROM_LOAD( "cg-5.u44",  0x20000, 0x20000, CRC(e2cbf489) SHA1(3a15ed7efd5696656e6d55b54ec0ff779bdb0d98) )
	ROM_LOAD( "cg-6.u45",  0x40000, 0x20000, CRC(4f2fced7) SHA1(b954856ffdc97fbc99fd3ec087376fbf466d2d5a) )

	ROM_REGION( 0xc000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "cg-1.u40",  0x0000, 0x4000, CRC(7dee8b1f) SHA1(80dbdf6aab9b02cc000956b7894023552428e6a1) )
	ROM_LOAD( "cg-2.u41",  0x4000, 0x4000, CRC(ce8dea39) SHA1(b30d1678a7b98cd821d2ce7383a83cb7c9f31b5f) )
	ROM_LOAD( "cg-3.u42",  0x8000, 0x4000, CRC(7e1f821f) SHA1(b709d49f9d1890fe3b8ca7f90affc0017a0ad95e) )
ROM_END

/*

1x ZILOG Z0840006PSC-Z80CPU (main)
1x YM2413 (sound)
1x NEC D8255AC (label: ORIGINAL BY IGS 102986)
1x oscillator 12.000MHz (main)
1x oscillator 3.579545MHz (sound)

1x custom QFP80 label AMT001
1x custom QFP80 label IGS002
1x custom DIP40 label IGS003 (under chip label 8255)
ROMs 3x MX27C1000DC (4,5,6)
1x NM27C256Q (7)
1x 27C512 (200)
2x PEEL18CV8P (8,9)
1x PAL16L8ACN (31)
2x PEEL18CV8P (12,14) <-> UNREADABLE, protected!

Note 1x 10x2 edge connector (con1) (looks like a coin payout)
1x 36x2 edge connector (con2)
1x pushbutton (sw6)
5x 8 switches dips (sw1-5)
1x trimmer (volume)
----------------------
IGS PCB NO-T0039-8

*/

ROM_START( pokerigs )
	// code at 0xf000 looks like startup code
	ROM_REGION( 0x20000, REGION_CPU1, 0 ) /* DIP28 Code */
	ROM_LOAD( "champingv-200g.u23", 0x00000, 0x10000, CRC(696cb684) SHA1(ce9e5bed83d0bd3b115f556cc89e3293ac6b69c3) )

	ROM_REGION( 0x60000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "cpoker4.u4",   0x00000, 0x20000, CRC(860be7c9) SHA1(41bc58713076276aeefc44c7ea903549692b0224) )
	ROM_LOAD( "cpoker5.u5",   0x20000, 0x20000, CRC(a68b305f) SHA1(f872d2bf7ab194145dffe6b254ae0ad66aa6a497) )
	ROM_LOAD( "cpoker6.u6",   0x40000, 0x20000, CRC(f3e61b24) SHA1(b18998defb6e51daef4ac5a5865674565ffb9029) )

	//copy?
	ROM_REGION( 0x60000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_COPY( REGION_GFX1, 0, 0, 0x60000 )

	ROM_REGION( 0x8000, REGION_USER1, 0 )
	ROM_LOAD( "cpoker7.u22",  0x00000, 0x8000, CRC(dae3ecda) SHA1(c881e143ec600c5a931f26cd097da6353e1da7c3) )

	// convert them to the pld format
	ROM_REGION( 0x2000, REGION_PLDS, ROMREGION_DISPOSE )
	ROM_LOAD( "ag-u31.u31",   0x00000, 0x000b60, CRC(fd36baf2) SHA1(caac8bf47bc958395f97b6191569196efe3b3eaa) )
	ROM_LOAD( "ag-u8.u8",     0x00000, 0x0015e2, CRC(c0308c63) SHA1(16819a5c147fef38a235675fa4442da9fa8a6618) )
	ROM_LOAD( "ag-u9.u9",     0x00000, 0x0015e2, CRC(2e8039a3) SHA1(e39635ee9485a5ccd28526f1af7ec2e3294b0aec) )
ROM_END

static DRIVER_INIT( iqblock )
{
	UINT8 *rom = memory_region(REGION_CPU1);
	int i;

	/* decrypt the program ROM */
	for (i = 0;i < 0xf000;i++)
	{
		if ((i & 0x0282) != 0x0282) rom[i] ^= 0x01;
		if ((i & 0x0940) == 0x0940) rom[i] ^= 0x02;
		if ((i & 0x0090) == 0x0010) rom[i] ^= 0x20;
	}

	/* initialize pointers for I/O mapped RAM */
	paletteram         = rom + 0x12000;
	paletteram_2       = rom + 0x12800;
	iqblock_fgvideoram = rom + 0x16800;
	iqblock_bgvideoram = rom + 0x17000;
	memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0xfe26, 0xfe26, 0, 0, iqblock_prot_w);
	iqblock_video_type=1;
}

static DRIVER_INIT( grndtour )
{
	UINT8 *rom = memory_region(REGION_CPU1);
	int i;

	/* decrypt the program ROM */
	for (i = 0;i < 0xf000;i++)
	{
		if ((i & 0x0282) != 0x0282) rom[i] ^= 0x01;
		if ((i & 0x0940) == 0x0940) rom[i] ^= 0x02;
		if ((i & 0x0060) == 0x0040) rom[i] ^= 0x20;
	}

	/* initialize pointers for I/O mapped RAM */
	paletteram         = rom + 0x12000;
	paletteram_2       = rom + 0x12800;
	iqblock_fgvideoram = rom + 0x16800;
	iqblock_bgvideoram = rom + 0x17000;
	memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0xfe39, 0xfe39, 0, 0, grndtour_prot_w);
	iqblock_video_type=0;
}


static DRIVER_INIT( cabaret )
{
	UINT8 *rom = memory_region(REGION_CPU1);
	int i;

	/* decrypt the program ROM */
	for (i = 0;i < 0xf000;i++)
	{
		if ((i & 0xb206) == 0xa002) rom[i] ^= 0x01;	// could be (i & 0x3206) == 0x2002
	}

	/* initialize pointers for I/O mapped RAM */
	paletteram         = rom + 0x12000;
	paletteram_2       = rom + 0x12800;
	iqblock_fgvideoram = rom + 0x16800;
	iqblock_bgvideoram = rom + 0x17000;
	iqblock_video_type=0;
}

static DRIVER_INIT( pokerigs )
{
	UINT8 *rom = memory_region(REGION_CPU1);
	int i;

	/* decrypt the program ROM */
	for (i = 0;i < 0x10000;i++)
	{
		if((i & 0x200) && (i & 0x80))
		{
			rom[i] ^= ((~i & 2) >> 1);
		}
		else
		{
			rom[i] ^= 0x01;
		}

		if((i & 0x30) != 0x10)
		{
			rom[i] ^= 0x20;
		}

		if((i & 0x900) == 0x900 && ((i & 0xc0) == 0x40 || (i & 0xc0) == 0xc0))
		{
			rom[i] ^= 0x02;
		}
	}


	/* initialize pointers for I/O mapped RAM */
	paletteram         = rom + 0x12000;
	paletteram_2       = rom + 0x12800;
	iqblock_fgvideoram = rom + 0x16800;
	iqblock_bgvideoram = rom + 0x17000;
	iqblock_video_type=0;
}


GAME( 1993, iqblock,  0, iqblock,  iqblock, iqblock,  ROT0, "IGS", "IQ-Block", 0 )
GAME( 1993, grndtour, 0, iqblock,  iqblock, grndtour, ROT0, "IGS", "Grand Tour", 0 )

GAME( 19??, cabaret,  0, cabaret,  iqblock, cabaret,  ROT0, "IGS", "Cabaret", GAME_NOT_WORKING | GAME_NO_SOUND )
GAME( 1995, pokerigs, 0, pokerigs, iqblock, pokerigs, ROT0, "IGS", "Poker? (IGS)", GAME_NOT_WORKING )
