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

    Mermaid
    Sanritsu

    driver by Zsolt Vasvari

    Games supported:
        * Mermaid
        * Rougien

    Known issues:
        * Hardware collision detection is not implemented.
        * Are the stars really supposed to go up in Rougien?


Yachtsman
Esco/Sanritsu, 1982

PCB Layout
----------


Lower PCB

C1-0111
|--------------------------------------------------------------|
|                                                              |
|                                col_a.96               RV1    |
|                                                              |
|                                                       RV2    |
|                    2016        col_b.95 HD10124 HD10124      |
|                                                              |
|2114                                                          |
|2114    merv_2.26   2114   mera-0.79 HD10124 HD10124 6116     |
|                                                              |
|                    2114   mera-2.78                    6116  |
|                                                              |
|                           merb-0.77                          |
|                                                              |
|                           merb-2.76                          |
|                                                              |
|                                                              |
|                                 24.576MHz HD10124 HD10124    |
|                                                              |
|                                                   HD10124    |
|                                                              |
|--------------------------------------------------------------|



Top Board

C2-0149
|------------------------------------------|
|Z80     mer-10.24   555    RV4 DSW1(8)    |
|                                          |
|        mer-9.23                          |
|                                          |
|        mer-8.22                          |
|                                          |-|
|   2114 mer-7.21           AY-3-8910        |
|                                            |
|   2114 mer-6.20                            |
|                                            |
|   2114 mer-5.19                            |
|                                            |
|   2114 mer-4.18  mervce.39                 |
|                                            |
|        mer-3.17           AY-3-8910        |
|                                          |-|
|        mer-2.16           RV3            |
|                                          |
|        mer-1.15                          |
|------------------------------------------|

Notes:
         RV1/2 : Potentiometers
         RV3/4 : Potentiometers
      Z80 Clock: 3.072MHz
          Vsync: 60Hz
          HSync: 15.24kHz

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

#include "driver.h"
#include "sound/ay8910.h"

extern UINT8* mermaid_videoram2;
extern UINT8* mermaid_bg_scrollram;
extern UINT8* mermaid_fg_scrollram;

extern WRITE8_HANDLER( mermaid_videoram2_w );
extern WRITE8_HANDLER( mermaid_videoram_w );
extern WRITE8_HANDLER( mermaid_colorram_w );
extern WRITE8_HANDLER( mermaid_flip_screen_x_w );
extern WRITE8_HANDLER( mermaid_flip_screen_y_w );
extern WRITE8_HANDLER( mermaid_bg_scroll_w );
extern WRITE8_HANDLER( mermaid_fg_scroll_w );
extern WRITE8_HANDLER( rougien_gfxbankswitch1_w );
extern WRITE8_HANDLER( rougien_gfxbankswitch2_w );
extern READ8_HANDLER( mermaid_collision_r );

extern PALETTE_INIT( mermaid );
extern VIDEO_START( mermaid );
extern VIDEO_UPDATE( mermaid );

/* Read/Write Handlers */

static UINT8 *mermaid_AY8910_enable;

static WRITE8_HANDLER( mermaid_AY8910_write_port_w )
{
	if (mermaid_AY8910_enable[0]) AY8910_write_port_0_w(offset, data);
	if (mermaid_AY8910_enable[1]) AY8910_write_port_1_w(offset, data);
}

static WRITE8_HANDLER( mermaid_AY8910_control_port_w )
{
	if (mermaid_AY8910_enable[0]) AY8910_control_port_0_w(offset, data);
	if (mermaid_AY8910_enable[1]) AY8910_control_port_1_w(offset, data);
}

/* Memory Map */

static ADDRESS_MAP_START( mermaid_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x9fff) AM_ROM
	AM_RANGE(0xc000, 0xc7ff) AM_RAM
	AM_RANGE(0xc800, 0xcbff) AM_RAM AM_WRITE(mermaid_videoram2_w) AM_BASE(&mermaid_videoram2)
	AM_RANGE(0xd000, 0xd3ff) AM_RAM AM_WRITE(mermaid_videoram_w) AM_BASE(&videoram)
	AM_RANGE(0xd800, 0xd81f) AM_RAM AM_WRITE(mermaid_bg_scroll_w) AM_BASE(&mermaid_bg_scrollram)
	AM_RANGE(0xd840, 0xd85f) AM_RAM AM_WRITE(mermaid_fg_scroll_w) AM_BASE(&mermaid_fg_scrollram)
	AM_RANGE(0xd880, 0xd8bf) AM_RAM AM_BASE(&spriteram) AM_SIZE(&spriteram_size)
	AM_RANGE(0xdc00, 0xdfff) AM_RAM AM_WRITE(mermaid_colorram_w) AM_BASE(&colorram)
	AM_RANGE(0xe000, 0xe000) AM_READ(input_port_0_r)
	AM_RANGE(0xe000, 0xe001) AM_RAM AM_BASE(&mermaid_AY8910_enable)
	AM_RANGE(0xe002, 0xe002) AM_WRITENOP	// ???
	AM_RANGE(0xe003, 0xe003) AM_WRITENOP	// ???
	AM_RANGE(0xe004, 0xe004) AM_WRITENOP	// ???
	AM_RANGE(0xe005, 0xe005) AM_WRITE(mermaid_flip_screen_x_w)
	AM_RANGE(0xe006, 0xe006) AM_WRITE(mermaid_flip_screen_y_w)
	AM_RANGE(0xe007, 0xe007) AM_WRITE(interrupt_enable_w)
	AM_RANGE(0xe800, 0xe800) AM_READ(input_port_1_r) AM_WRITENOP // ???
	AM_RANGE(0xe801, 0xe801) AM_WRITENOP	// ???
	AM_RANGE(0xe802, 0xe802) AM_WRITENOP	// ???
	AM_RANGE(0xe803, 0xe803) AM_WRITENOP	// ???
	AM_RANGE(0xe804, 0xe804) AM_WRITE(rougien_gfxbankswitch1_w)
	AM_RANGE(0xe805, 0xe805) AM_WRITE(rougien_gfxbankswitch2_w)
	AM_RANGE(0xe807, 0xe807) AM_WRITENOP	// ???
	AM_RANGE(0xf000, 0xf000) AM_READ(input_port_2_r)
	AM_RANGE(0xf800, 0xf800) AM_READ(mermaid_collision_r)
	AM_RANGE(0xf802, 0xf802) AM_WRITENOP	// ???
	AM_RANGE(0xf806, 0xf806) AM_WRITE(mermaid_AY8910_write_port_w)
	AM_RANGE(0xf807, 0xf807) AM_WRITE(mermaid_AY8910_control_port_w)
ADDRESS_MAP_END

/* Input Ports */

INPUT_PORTS_START( mermaid )
	PORT_START_TAG("DSW")
	PORT_DIPNAME( 0x01, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x00, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x00, "20K" )
	PORT_DIPSETTING(    0x04, "30K" )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Allow_Continue ) )
	PORT_DIPSETTING(    0x00, DEF_STR( No ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x30, 0x00, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "3" )
	PORT_DIPSETTING(    0x10, "4" )
	PORT_DIPSETTING(    0x20, "5" )
	PORT_DIPSETTING(    0x30, "6" )
	PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 1C_2C ))
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_3C ) )

	PORT_START_TAG("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP    ) PORT_8WAY
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT  ) PORT_8WAY
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN  ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON1 )
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_START1 )
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_START2 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )

	PORT_START_TAG("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP    ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT  ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN  ) PORT_8WAY PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_COIN2 )
INPUT_PORTS_END

/* Graphics Layouts */

static const gfx_layout background_charlayout =
{
	8, 8,    /* 8*8 chars */
	RGN_FRAC(1,1),    /* 256 characters */
	1,      /* 1 bit per pixel */
	{ 0 },  /* single bitplane */
	{ 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 foreground_charlayout =
{
	8, 8,    /* 8*8 chars */
	RGN_FRAC(1,2),   /* 1024 characters */
	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 spritelayout =
{
	16, 16,	/* 16*16 sprites */
	RGN_FRAC(1,2),	/* 256 sprites */
	2,		/* 2 bits per pixel */
	{ 0, RGN_FRAC(1,2) },	/* the two bitplanes are separated */
	{ 0, 1, 2, 3, 4, 5, 6, 7,
	  8*8+0, 8*8+1, 8*8+2, 8*8+3, 8*8+4, 8*8+5, 8*8+6, 8*8+7 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
	  16*8, 17*8, 18*8, 19*8, 20*8, 21*8, 22*8, 23*8 },
	32*8	/* every sprite takes 32 consecutive bytes */
};

/* Graphics Decode Information */

static const gfx_decode gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &foreground_charlayout,     0, 16 },
	{ REGION_GFX1, 0, &spritelayout,              0, 16 },
	{ REGION_GFX2, 0, &background_charlayout,  4*16, 2  },
	{ -1 }
};

/* Sound Interface */

/* Machine Driver */

static MACHINE_DRIVER_START( mermaid )
	// basic machine hardware
	MDRV_CPU_ADD(Z80, 4000000)	// ???
	MDRV_CPU_PROGRAM_MAP(mermaid_map, 0)
	MDRV_CPU_VBLANK_INT(nmi_line_pulse, 1)

	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(DEFAULT_REAL_60HZ_VBLANK_DURATION)

	// video hardware
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(4*16+1)
	MDRV_COLORTABLE_LENGTH(4*16+2*2)

	MDRV_PALETTE_INIT(mermaid)
	MDRV_VIDEO_START(mermaid)
	MDRV_VIDEO_UPDATE(mermaid)

	// sound hardware
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD(AY8910, 1500000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)

	MDRV_SOUND_ADD(AY8910, 1500000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
MACHINE_DRIVER_END

/* ROMs */

ROM_START( mermaid )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )       // 64k for code
	ROM_LOAD( "g960_32.15",	0x0000, 0x1000, CRC(8311f090) SHA1(c59485a712cf1cd384f03874c693b58e972fe4da) )
	ROM_LOAD( "g960_33.16",	0x1000, 0x1000, CRC(9f274fc4) SHA1(4098e98c9d95f7e621de061925374154a23c5d35) )
	ROM_LOAD( "g960_34.17",	0x2000, 0x1000, CRC(5f910179) SHA1(bcf1e24b7584d18f9e85a8b4aec6f03bb1034150) )
	ROM_LOAD( "g960_35.18",	0x3000, 0x1000, CRC(db1868a1) SHA1(f5bb0b9895c5e2facc5ae9db9f1bed44e14d308a) )
	ROM_LOAD( "g960_36.19",	0x4000, 0x1000, CRC(178a3567) SHA1(993479d9fadf1c4d3f44ce030f2d6197ecfceb9d) )
	ROM_LOAD( "g960_37.20",	0x5000, 0x1000, CRC(7d602527) SHA1(1a888bd1829b9f12dd820c49785bea6bc8edab04) )
	ROM_LOAD( "g960_38.21",	0x6000, 0x1000, CRC(bf9f623c) SHA1(48d3aebb01c01c51acaccd1a4582ab21e6ed1104) )
	ROM_LOAD( "g960_39.22",	0x7000, 0x1000, CRC(df0db390) SHA1(b466cf1abbf0703d6fbacc86c65d254ef310ba27) )
	ROM_LOAD( "g960_40.23",	0x8000, 0x1000, CRC(fb7aba3f) SHA1(fe6903c11363ed4c34b29226df58e833150cc525) )
	ROM_LOAD( "g960_41.24",	0x9000, 0x1000, CRC(d022981d) SHA1(ab1659a933af4d49daeacd70072f6c1197181c20) )

	ROM_REGION( 0x4000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "g960_45.77",	0x0000, 0x1000, CRC(1f6b735e) SHA1(dd7ea4ef674f0495a87fc1929ea14852e8d8d338) )
	ROM_LOAD( "g960_44.76",	0x1000, 0x1000, CRC(fd76074e) SHA1(673a214fc41b923191b4136c0cf39fc5efa970ba) )
	ROM_LOAD( "g960_47.79",	0x2000, 0x1000, CRC(3b7d4ad0) SHA1(722483989c611b6396538dd3b357589262f366e3) )
	ROM_LOAD( "g960_46.78",	0x3000, 0x1000, CRC(50c117cd) SHA1(45b4055497c785218e2aaaffa86d732912555821) )

	ROM_REGION( 0x1000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "g960_43.26",	0x0000, 0x1000, CRC(6f077417) SHA1(f2c20e03427a2f5a113c6a4cf95875b77a0ec418) )

	ROM_REGION( 0x40, REGION_PROMS, 0 )
	ROM_LOAD( "col_a.96", 	    0x0000, 0x0020, CRC(ef87bcd6) SHA1(00a5888ad028fabeb7369eed33be5cd49b6b7bb0) )
	ROM_LOAD( "col_b.95", 	    0x0020, 0x0020, CRC(ca48abdd) SHA1(a864612c2c33acddfa9993ed10a1d63d2e3f145d) )

	ROM_REGION( 0x1000, REGION_USER1, 0 )	// unknown
	ROM_LOAD( "g960_42.39",	0x0000, 0x1000, CRC(287840bb) SHA1(9a1836f39f328b0c9672976d95a9ece45bb9e89f) )
ROM_END

ROM_START( rougien )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )       // 64k for code
	ROM_LOAD( "rou-00.bin", 0x0000, 0x1000, CRC(14cd1108) SHA1(46657fa4d900936e2a71ad43702d2c43fef09efe) )
	ROM_LOAD( "rou-01.bin", 0x1000, 0x1000, CRC(ee40670d) SHA1(7c31c3b693999bc1ae42b9f2de1a9883d3db535d) )
	ROM_LOAD( "rou-02.bin", 0x2000, 0x1000, CRC(5e528f46) SHA1(6bad10bb72eab423b6478e8d5a41e92f0b72793c) )
	ROM_LOAD( "rou-03.bin", 0x3000, 0x1000, CRC(d235a7e8) SHA1(0c0cbf81d3b379dc5d82c3541dd3b32ccad73046) )
	ROM_LOAD( "rou-04.bin", 0x4000, 0x1000, CRC(7352bb66) SHA1(0bc41faf67d5305258909c9523461cdf8d10d9dc) )
	ROM_LOAD( "rou-05.bin", 0x5000, 0x1000, CRC(af77444d) SHA1(d7c2b59fbaa7be813ed5dcd9d7babc19e0fec9fd) )
	ROM_LOAD( "rou-06.bin", 0x6000, 0x1000, CRC(2c16c857) SHA1(f31189cf73635a1542a18193da85ed898c297768) )
	ROM_LOAD( "rou-07.bin", 0x7000, 0x1000, CRC(fbf32f2e) SHA1(ab8a2bc8ee10e308e887b2bef2b92e1669aab888) )
	ROM_LOAD( "rou-08.bin", 0x8000, 0x1000, CRC(bfac531c) SHA1(63e6bdd1ca2709ae733c84311df5833546f08663) )
	ROM_LOAD( "rou-09.bin", 0x9000, 0x1000, CRC(af854340) SHA1(f2d5e1bb6b25d87ee03c21975f9c9976ae3652b1) )

	ROM_REGION( 0xc000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "rou-21.bin", 0x0000, 0x1000, CRC(36e4ba8c) SHA1(6c39de7d983019b280c54e03d4ca0fe2cef4ea90) )
	ROM_LOAD( "rou-20.bin", 0x1000, 0x1000, CRC(c5dc1258) SHA1(20034c77f205684f9c868747988ab391456a2189) )
	ROM_LOAD( "rou-23.bin", 0x2000, 0x1000, CRC(5974c848) SHA1(a3e5408aaee87afadea521115f78686f84832ab9) )
	ROM_LOAD( "rou-22.bin", 0x3000, 0x1000, CRC(35811443) SHA1(3e0ec254a94730664a3d13dd10d87d2040c9c5e6) )
	ROM_LOAD( "rou-25.bin", 0x4000, 0x1000, CRC(706d9864) SHA1(26d7e803670f791938a7e93bf3b68a94525c0458) )
	ROM_LOAD( "rou-24.bin", 0x5000, 0x1000, CRC(56ceb0be) SHA1(a5475ce7d66e9f97da373d3fb694b536a257e78d) )
	ROM_LOAD( "rou-27.bin", 0x6000, 0x1000, CRC(522fa2e0) SHA1(ce20c5e447f27cb147a62c1dd176d9dfa60f4c33) )
	ROM_LOAD( "rou-26.bin", 0x7000, 0x1000, CRC(fbbc6339) SHA1(a4c7035fe61a267b53372a0504e7932e52ac4119) )
	ROM_LOAD( "rou-29.bin", 0x8000, 0x1000, CRC(bf018a7e) SHA1(e608630ead16f01f9b186f622644ce2567f29057) )
	ROM_LOAD( "rou-28.bin", 0x9000, 0x1000, CRC(33f160dc) SHA1(3fc3a31a37cc724c692080edc2e4fd8678e9a8c9) )
	ROM_LOAD( "rou-31.bin", 0xa000, 0x1000, CRC(b2a6f058) SHA1(faba09b6fd80e1e20e79435b60ce89e7110ec98a) )
	ROM_LOAD( "rou-30.bin", 0xb000, 0x1000, CRC(c75be223) SHA1(ca3fa46d9132a31b46e6e29a8b91acf7a380fd74) )

	ROM_REGION( 0x1000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "rou-43.bin", 0x0000, 0x1000, CRC(ee4b9de4) SHA1(878a86113435536545353f68864c3a034566c616) )

	ROM_REGION( 0x40, REGION_PROMS, 0 )
	ROM_LOAD( "prom_a.bin", 0x0000, 0x0020, CRC(49f619b9) SHA1(c936aaf79822628a2ffff169d236389bc2eef6a5) )
	ROM_LOAD( "prom_b.bin", 0x0020, 0x0020, CRC(41ad4fc8) SHA1(a9d24586130f00cd350459635de5f4f7629e00b4) )

	ROM_REGION( 0x3000, REGION_USER1, 0 )	// unknown
	ROM_LOAD( "rou-40.bin", 0x0000, 0x1000, CRC(ab38b942) SHA1(9575f67e002c68d384122e05a12c6c0f21335825) )
	ROM_LOAD( "rou-41.bin", 0x1000, 0x1000, CRC(59ed0d88) SHA1(7faf6ab01fa3c1c04c38d2ea27b27c47450876de) )
	ROM_LOAD( "rou-42.bin", 0x2000, 0x1000, CRC(5ce13444) SHA1(e6da83190b26b094159a3a97deffd31d0d20a061) )
ROM_END

ROM_START( yachtmn )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )       // 64k for code
	ROM_LOAD( "mer-1.15",	0x0000, 0x1000, CRC(a102b180) SHA1(f1f029797d09d89c98ffc96b1e57f3ab8e89f35a) )
	ROM_LOAD( "mer-2.16",	0x1000, 0x1000, CRC(0f2ba7fc) SHA1(5eac8300eb755f5f3a88776dbc5cf7995d2f3c44) )
	ROM_LOAD( "mer-3.17",	0x2000, 0x1000, CRC(46c22b6b) SHA1(3d6293cf99e9263e986a6046a0f08ee0416a2856) )
	ROM_LOAD( "mer-4.18",	0x3000, 0x1000, CRC(0ec84a12) SHA1(4f2d1509785d659b7e66df0525cbbd3a500370e2) )
	ROM_LOAD( "mer-5.19",	0x4000, 0x1000, CRC(315153d5) SHA1(c3fa4c1e59026e291ddbd448aede159af9827714) )
	ROM_LOAD( "g960_37.20",	0x5000, 0x1000, CRC(7d602527) SHA1(1a888bd1829b9f12dd820c49785bea6bc8edab04) ) // mer-6.20
	ROM_LOAD( "mer-7.21",	0x6000, 0x1000, CRC(20d56a6e) SHA1(b9867f073b38cbf6a98697fe6af6c4cb20d7f54b) )
	ROM_LOAD( "g960_39.22",	0x7000, 0x1000, CRC(df0db390) SHA1(b466cf1abbf0703d6fbacc86c65d254ef310ba27) ) // mer-8.22
	ROM_LOAD( "g960_40.23",	0x8000, 0x1000, CRC(fb7aba3f) SHA1(fe6903c11363ed4c34b29226df58e833150cc525) ) // mer-9.23
	ROM_LOAD( "mer-10.24",	0x9000, 0x1000, CRC(04ca4f8c) SHA1(c7a437fabe3dd6968258f13e688bd6ed8500eb8e) )

	ROM_REGION( 0x4000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "g960_45.77",	0x0000, 0x1000, CRC(1f6b735e) SHA1(dd7ea4ef674f0495a87fc1929ea14852e8d8d338) ) // merb-0.77
	ROM_LOAD( "g960_44.76",	0x1000, 0x1000, CRC(fd76074e) SHA1(673a214fc41b923191b4136c0cf39fc5efa970ba) ) // merb-2.76
	ROM_LOAD( "mera-0.79",	0x2000, 0x1000, CRC(6e3e48c4) SHA1(810e140310e668343bc2052e6c9527c090e0aa3c) )
	ROM_LOAD( "g960_46.78",	0x3000, 0x1000, CRC(50c117cd) SHA1(45b4055497c785218e2aaaffa86d732912555821) ) // mera-2.78

	ROM_REGION( 0x1000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "g960_43.26",	0x0000, 0x1000, CRC(6f077417) SHA1(f2c20e03427a2f5a113c6a4cf95875b77a0ec418) ) // merv_2.26

	ROM_REGION( 0x40, REGION_PROMS, 0 )
	ROM_LOAD( "col_a.96", 	    0x0000, 0x0020, CRC(ef87bcd6) SHA1(00a5888ad028fabeb7369eed33be5cd49b6b7bb0) ) // col_a.96
	ROM_LOAD( "col_b.95", 	    0x0020, 0x0020, CRC(ca48abdd) SHA1(a864612c2c33acddfa9993ed10a1d63d2e3f145d) ) // col_b.95

	ROM_REGION( 0x1000, REGION_USER1, 0 )	// unknown
	ROM_LOAD( "g960_42.39",	0x0000, 0x1000, CRC(287840bb) SHA1(9a1836f39f328b0c9672976d95a9ece45bb9e89f) ) // mervce.39
ROM_END


/* Game Drivers */

GAME( 1982, mermaid, 0, mermaid, mermaid, 0, ROT0, "[Sanritsu] Rock-Ola", "Mermaid", GAME_NOT_WORKING )
GAME( 1982, yachtmn, mermaid, mermaid, mermaid, 0, ROT0, "[Sanritsu] Esco", "Yachtsman", GAME_NOT_WORKING )
GAME( 1982, rougien, 0, mermaid, mermaid, 0, ROT0, "Sanritsu",            "Rougien", 0 )
