/*
Main Event - SNK 1984
Canvas Croquis - SNK 1985

driver by David Haywood, Tomasz Slanina


Notes:
------
- mainsnk controls:
  The game uses 2 joysticks (with button on top) and 2 buttons per player.
  Left stick
  up: left straight punch to enemy's face
  left: swey to left

  Right stick
  up: right straight punch to enemy's face
  right: swey to right

  Left + Right stick combinations
  L down + R up: right straight punch to enemy's body
  L up + R down: left straight punch to enemy's body
  L right + R left: guard player's body

  to move the boxer, use joystick while pressing the button on top of the stick.

  Left button: left uppercut
  Right button: right uppercut
  to recover from down, press these buttons rapidly.


- canvas doesn't use the tx layer, though the circuitry is presumably still
  present on the pcb. One gfx ROM socket is left empty which causes the tx layer
  to be completely transparent.

- neither mainsnk nor canvas pass the ROM test in service mode. This looks like
  a bug (as in madcrash). SNK obviously didn't pay too much attention to details
  in those days.
  Note that in canvas you can't see the error since the tx layer is transparent.
  Load cc_p9.a2 at 0x0000 to see it.

TODO:
-----
- are mainsnk control right? The way the button works is awkward.

- several unknown dip switches

- the hardware surely supports sprite shadows as most of the games in snk.c, but
  the feature isn't used by these two games.

- mainsnk doesn't seem to write to the bg/sprite scroll registers? SO I hardcoded
  scroll values for these two games, even if canvas does seem to write to them.

- canvas writes to several unknown addresses on startup. Most of them should be
  the scroll registers while others are unknown.

- the bg tilemap is set to 256x256, however it could well be 512x256 as in the
  other early SNK games in snk.c.

-----

Canvas Croquis

file : readme.txt
author : Stefan Lindberg
created: 2005-12-24
updated: *
version: 1.0

Canvas Croquis, SNK 1984

Note:

The bproms(MB7054) was read as 74s572.
I have not tested this PCB yet so i have no idea if it's workin.
All Bproms and P1-P8 is on top pcb, P9-P14 on bottom board, see pictures.

Documentation:

Name Size CRC32
-----------------------------------------------------------
cc_top_pcb.jpg 974024 0xd2fb553e
cc_bottom_pcb.jpg 964448 0xe8bad203
Roms:
Name Size CRC32 Chip Type
-----------------------------------------------------------
cc_bprom1.j10 1024 0xfbbbf911 MB7054 (read as 74s572)
cc_bprom2.j9 1024 0x19efe7df MB7054 (read as 74s572)
cc_bprom3.j8 1024 0x21f72498 MB7054 (read as 74s572)
cc_p1.a2 8192 0xfa7109e1 M5L2764k
cc_p2.a3 8192 0x8b8beb34 M5L2764k
cc_p3.a4 8192 0xea342f87 M5L2764k
cc_p4.a5 8192 0x9cf35d98 M5L2764k
cc_p5.a7 8192 0xc5ef1eda M5L2764k
cc_p6.a8 8192 0x7b1dd7fc M5L2764k
cc_p7.h2 16384 0x029b5ea0 M5L27128k
cc_p8.f2 8192 0x0f0368ce M5L2764k
cc_p9.a2 16384 0xb58c5f24 M5L27128k
cc_p10.b2 16384 0x3c0a4eeb M5L27128k
cc_p11.c2 16384 0x4c8c2156 M5L27128k
cc_p12.j8 8192 0x9003a979 M5L2764k
cc_p13.j5 8192 0xa52cd549 M5L2764k
cc_p14.j2 8192 0xedc6a1eb M5L2764k

. Board supplied by Stefan Lindberg
. Board dumped by Stefan Lindberg

*/

#include "driver.h"
#include "cpu/z80/z80.h"
#include "snk.h"
#include "sound/ay8910.h"

extern UINT8 *mainsnk_fgram;
extern UINT8 *mainsnk_bgram;
WRITE8_HANDLER(mainsnk_c600_w);
WRITE8_HANDLER(mainsnk_fgram_w);
WRITE8_HANDLER(mainsnk_bgram_w);
VIDEO_START(mainsnk);
VIDEO_UPDATE(mainsnk);
VIDEO_UPDATE(canvas);

static int sound_cpu_busy;


static WRITE8_HANDLER( sound_command_w )
{
	sound_cpu_busy = 1;
	soundlatch_w(space, 0, data);
	cputag_set_input_line(space->machine, "audiocpu", INPUT_LINE_NMI, PULSE_LINE);
}

static READ8_HANDLER( sound_command_r )
{
	return soundlatch_r(space, 0);
}

static READ8_HANDLER( sound_ack_r )
{
	sound_cpu_busy = 0;
	return 0xff;
}

static CUSTOM_INPUT( mainsnk_sound_r )
{
	return (sound_cpu_busy) ? 0x01 : 0x00;
}



static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0xbfff) AM_ROM
	AM_RANGE(0xc000, 0xc000) AM_READ_PORT("IN0")
	AM_RANGE(0xc100, 0xc100) AM_READ_PORT("IN1")
	AM_RANGE(0xc200, 0xc200) AM_READ_PORT("IN2")
	AM_RANGE(0xc300, 0xc300) AM_READ_PORT("IN3")
	AM_RANGE(0xc400, 0xc400) AM_READ_PORT("DSW1")
	AM_RANGE(0xc500, 0xc500) AM_READ_PORT("DSW2")
	AM_RANGE(0xc600, 0xc600) AM_WRITE(mainsnk_c600_w)
	AM_RANGE(0xc700, 0xc700) AM_WRITE(sound_command_w)
	AM_RANGE(0xd800, 0xdbff) AM_RAM_WRITE(mainsnk_bgram_w) AM_BASE(&mainsnk_bgram)
	AM_RANGE(0xdc00, 0xe7ff) AM_RAM
	AM_RANGE(0xe800, 0xefff) AM_RAM AM_BASE(&spriteram)
	AM_RANGE(0xf000, 0xf7ff) AM_RAM_WRITE(mainsnk_fgram_w) AM_BASE(&mainsnk_fgram)	// + work RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM
	AM_RANGE(0x8000, 0x87ff) AM_RAM
	AM_RANGE(0xa000, 0xa000) AM_READ(sound_command_r)
	AM_RANGE(0xc000, 0xc000) AM_READ(sound_ack_r)
	AM_RANGE(0xe000, 0xe001) AM_DEVWRITE("ay1", ay8910_address_data_w)
	AM_RANGE(0xe002, 0xe003) AM_WRITENOP	// ? always FFFF, snkwave leftover?
	AM_RANGE(0xe008, 0xe009) AM_DEVWRITE("ay2", ay8910_address_data_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START( sound_portmap, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x00, 0x00) AM_READNOP
ADDRESS_MAP_END



static INPUT_PORTS_START( mainsnk )
	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SERVICE1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW,  IPT_START1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW,  IPT_START2 )
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(mainsnk_sound_r, NULL)	/* sound CPU status */
	PORT_BIT( 0x40, IP_ACTIVE_LOW,  IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW,  IPT_SERVICE )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_UP )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_DOWN )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_LEFT )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_RIGHT )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_UP )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_DOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_LEFT )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_RIGHT )

	PORT_START("IN2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_UP ) PORT_PLAYER(2)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_DOWN ) PORT_PLAYER(2)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_LEFT ) PORT_PLAYER(2)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_RIGHT ) PORT_PLAYER(2)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_UP ) PORT_PLAYER(2)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_DOWN ) PORT_PLAYER(2)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_LEFT ) PORT_PLAYER(2)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_RIGHT ) PORT_PLAYER(2)

	PORT_START("IN3")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 )	// button on top of left stick
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON2 )	// button on top of right stick
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON3 )	// left button
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON4 )	// right button
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(2)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(2)

	// the manual only mentions one dip switch apparently.
	PORT_START("DSW1")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:1")
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:2")
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:3")
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:4")
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:5")
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:6")
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW2")
	PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coinage ) ) PORT_DIPLOCATION("DSW2:1,2,3")
//  PORT_DIPSETTING(    0x04, DEF_STR( 3C_1C ) )    // duplicate
//  PORT_DIPSETTING(    0x02, DEF_STR( 3C_1C ) )    // duplicate
	PORT_DIPSETTING(    0x01, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("DSW2:4")
	PORT_DIPSETTING(    0x08, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hard ) )
	PORT_DIPNAME( 0x10, 0x10, "Round Time" ) PORT_DIPLOCATION("DSW2:5") /* $1ecf */
	PORT_DIPSETTING(    0x10, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x00, "Short" )
	PORT_DIPNAME( 0x60, 0x20, "Game mode" ) PORT_DIPLOCATION("DSW2:6,7")
	PORT_DIPSETTING(    0x60, "Demo Sounds Off" )
	PORT_DIPSETTING(    0x20, "Demo Sounds On" )
	PORT_DIPSETTING(    0x00, "Freeze" )
	PORT_DIPSETTING(    0x40, "Endless Game (Cheat)" )
	PORT_DIPNAME( 0x80, 0x80, "2 Players Game" ) PORT_DIPLOCATION("DSW2:8")
	PORT_DIPSETTING(    0x80, "1 Credit" )
	PORT_DIPSETTING(    0x00, "2 Credits" )
INPUT_PORTS_END

static INPUT_PORTS_START( canvas )
	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SERVICE1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW,  IPT_START1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW,  IPT_START2 )
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(mainsnk_sound_r, NULL)	/* sound CPU status */
	PORT_BIT( 0x40, IP_ACTIVE_LOW,  IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW,  IPT_SERVICE )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("IN2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN  ) PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT  ) PORT_COCKTAIL
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_COCKTAIL
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("IN3")
	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("DSW1")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:1")
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("DSW1:2")
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Lives ) ) PORT_DIPLOCATION("DSW1:3")
	PORT_DIPSETTING(    0x04, "3" )
	PORT_DIPSETTING(    0x00, "5" )
	PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coinage ) ) PORT_DIPLOCATION("DSW1:4,5,6")
//  PORT_DIPSETTING(    0x08, DEF_STR( 5C_1C ) )    // duplicate
	PORT_DIPSETTING(    0x10, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x38, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x28, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Free_Play ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:7")	// bonus life?
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW1:8")	// bonus life?
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW2")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW2:1")	// bonus life?
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW2:2")	// difficulty?
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW2:3")	// difficulty?
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x18, 0x10, "Game mode" ) PORT_DIPLOCATION("DSW2:4,5")
	PORT_DIPSETTING(    0x18, "Demo Sounds Off" )
	PORT_DIPSETTING(    0x10, "Demo Sounds On" )
	PORT_DIPSETTING(    0x00, "Freeze" )
	PORT_DIPSETTING(    0x08, "Infinite Lives (Cheat)" )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Flip_Screen ) ) PORT_DIPLOCATION("DSW2:6")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) PORT_DIPLOCATION("DSW2:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, "Must Be On" ) PORT_DIPLOCATION("DSW2:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )	// needs to be on otherwise pictures in later levels are wrong
INPUT_PORTS_END


static const gfx_layout tile_layout =
{
	8,8,
	RGN_FRAC(1,1),
	4,
	{ 0, 1, 2, 3 },
	{ 4, 0, 12, 8, 20, 16, 28, 24},
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 },
	256
};


static const gfx_layout sprite_layout =
{
	16,16,
	RGN_FRAC(1,3),
	3,
	{ RGN_FRAC(2,3),RGN_FRAC(1,3),RGN_FRAC(0,3) },
	{ 7,6,5,4,3,2,1,0, 15,14,13,12,11,10,9,8 },
	{ 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 },
	256
};


static GFXDECODE_START( mainsnk )
	GFXDECODE_ENTRY( "gfx1", 0, tile_layout,   0x100, 0x080>>4 )
	GFXDECODE_ENTRY( "gfx2", 0, sprite_layout, 0x000, 0x080>>3 )
GFXDECODE_END



static MACHINE_DRIVER_START( mainsnk )
	MDRV_CPU_ADD("maincpu", Z80, 3360000)
	MDRV_CPU_PROGRAM_MAP(main_map)
	MDRV_CPU_VBLANK_INT("screen", irq0_line_hold)

	MDRV_CPU_ADD("audiocpu", Z80,4000000)
 	MDRV_CPU_PROGRAM_MAP(sound_map)
 	MDRV_CPU_IO_MAP(sound_portmap)
	MDRV_CPU_PERIODIC_INT(irq0_line_hold, 244)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_HAS_SHADOWS)

	MDRV_SCREEN_ADD("screen", RASTER)
	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(36*8, 28*8)
	MDRV_SCREEN_VISIBLE_AREA(0*8, 36*8-1, 1*8, 28*8-1)

	MDRV_GFXDECODE(mainsnk)
	MDRV_PALETTE_LENGTH(0x400)

	MDRV_PALETTE_INIT(tnk3)
	MDRV_VIDEO_START(mainsnk)
	MDRV_VIDEO_UPDATE(mainsnk)

	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD("ay1", AY8910, 2000000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.35)

	MDRV_SOUND_ADD("ay2", AY8910, 2000000)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.35)
MACHINE_DRIVER_END


ROM_START( mainsnk)
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "snk.p01",      0x0000, 0x2000, CRC(00db1ca2) SHA1(efe83488cf88adc185e6024b8f6ad5f8ef7f4cfd) )
	ROM_LOAD( "snk.p02",      0x2000, 0x2000, CRC(df5c86b5) SHA1(e9c854524e3d8231c874314cdff321e66ec7f0c4) )
	ROM_LOAD( "snk.p03",      0x4000, 0x2000, CRC(5c2b7bca) SHA1(e02c72fcd029999b730abd91f07866418cfe6216) )
	ROM_LOAD( "snk.p04",      0x6000, 0x2000, CRC(68b4b2a1) SHA1(8f3abc826df93f0748151624066e956b9670bc9d) )
	ROM_LOAD( "snk.p05",      0x8000, 0x2000, CRC(580a29b4) SHA1(4a96af92d65f86aca7f3a70032b5e4dc29048483) )
	ROM_LOAD( "snk.p06",      0xa000, 0x2000, CRC(5f8a60a2) SHA1(88a051e13d6b3bbd3606a4c4cc0395da07e0f109) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "snk.p07",	     0x0000, 0x4000, CRC(4208391e) SHA1(d110ca4ff9d21fe7813f04ec43c2c23471c6517f) )

	ROM_REGION( 0x08000, "gfx1", 0 )
	ROM_LOAD( "snk.p12",      0x0000, 0x2000, CRC(ecf87eb7) SHA1(83b8d19070d5930b306a0309ebba05b04c2abebf) )
	ROM_LOAD( "snk.p11",      0x2000, 0x2000, CRC(3f6bc5ba) SHA1(02e49f58f5d94117113b59037fa49b8897d05b4b) )
	ROM_LOAD( "snk.p10",      0x4000, 0x2000, CRC(b5147a96) SHA1(72641fadabd16f2de4f4cf6ff3ef07233de5ddfd) )
	ROM_LOAD( "snk.p09",      0x6000, 0x2000, CRC(0ebcf837) SHA1(7b93cdffd3b8d768b98bb01956114e4ff012d029) )

	ROM_REGION( 0x12000, "gfx2", 0 )
	ROM_LOAD( "snk.p13",      0x00000, 0x2000, CRC(2eb624a4) SHA1(157d7beb6ff0baa9276e388774a85996dc03821d) )
	ROM_LOAD( "snk.p16",      0x02000, 0x2000, CRC(dc502869) SHA1(024c868e8cd74c52f4787a19b9ad292b7a9dcc1c) )
	ROM_LOAD( "snk.p19",      0x04000, 0x2000, CRC(58d566a1) SHA1(1451b223ddb7c975b770f28af6c41775daaf95c1) )
	ROM_LOAD( "snk.p14",      0x06000, 0x2000, CRC(bb927d82) SHA1(ac7ae1850cf22b73e31c92b6f598fb057470a570) )
	ROM_LOAD( "snk.p17",      0x08000, 0x2000, CRC(66f60c32) SHA1(7a08d0a2c1804cdaad702a23ff33128d0b6d8084) )
	ROM_LOAD( "snk.p20",      0x0a000, 0x2000, CRC(d12c6333) SHA1(bed1a0aedaa8f6fe9c33f49b5da00ab1c9045ddd) )
	ROM_LOAD( "snk.p15",      0x0c000, 0x2000, CRC(d242486d) SHA1(0c24a3fdcb604b6231b75069c99009d68023bb8f) )
	ROM_LOAD( "snk.p18",      0x0e000, 0x2000, CRC(838b12a3) SHA1(a3444f9b2aeef70caa93e5f642cb6c3b75e88ea4) )
	ROM_LOAD( "snk.p21",      0x10000, 0x2000, CRC(8961a51e) SHA1(4f9d8358bc76118c4fab631ae73a02ab5aa0c036) )

	ROM_REGION( 0x1000, "proms", 0 )	// overdumps? 2nd half is empty
	ROM_LOAD( "main3.bin",    0x0000, 0x0800, CRC(78b29dde) SHA1(c2f93cde6fd8bc175e9e0d38af41b7710d7f1c82) )
	ROM_LOAD( "main2.bin",    0x0400, 0x0800, CRC(7c314c93) SHA1(c6bd2a0eaf617448ef65dcbadced313b0d69ab88) )
	ROM_LOAD( "main1.bin",    0x0800, 0x0800, CRC(deb895c4) SHA1(f1281dcb3471d9627565706ff09ba72f09dc62a4) )
ROM_END

ROM_START( canvas )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "cc_p1.a2",      0x0000, 0x2000, CRC(fa7109e1) SHA1(23e31e14af2171ee2fd7290194805b95b0f7b35c) )
	ROM_LOAD( "cc_p2.a3",      0x2000, 0x2000, CRC(8b8beb34) SHA1(c678ed7ec302eaac3594950f10f0a170353345e5) )
	ROM_LOAD( "cc_p3.a4",      0x4000, 0x2000, CRC(ea342f87) SHA1(087e1260ba51bf47bf19942b59d21d067515989d) )
	ROM_LOAD( "cc_p4.a5",      0x6000, 0x2000, CRC(9cf35d98) SHA1(08de7863f1a540b69487c87eb0a493ceeacffa1b) )
	ROM_LOAD( "cc_p5.a7",      0x8000, 0x2000, CRC(c5ef1eda) SHA1(31cf3e7fe52718bebffdac9b3666454b0956a6d9) )
	ROM_LOAD( "cc_p6.a8",      0xa000, 0x2000, CRC(7b1dd7fc) SHA1(1287ab261885d5e9ba957024d7a00c7a0d31235b) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "cc_p7.h2",	   0x0000, 0x4000, CRC(029b5ea0) SHA1(88f84b4dd01656ded8d983396ded404c9d8186f1) )
	ROM_LOAD( "cc_p8.f2",	   0x4000, 0x2000, CRC(0f0368ce) SHA1(a02f066ea024285a931b85709822a50a4099e0b0) )

	ROM_REGION( 0x10000, "gfx1", 0 )
	ROM_FILL(                  0x0000, 0x4000, 0xff )	// empty, causes tx layer to be fully transparent
	ROM_LOAD( "cc_p11.c2",     0x4000, 0x4000, CRC(4c8c2156) SHA1(7f1d9a1e1c6cab91f24c7fc75d0c7ec2702137af) )	// banks = 18&58
	ROM_LOAD( "cc_p10.b2",     0x8000, 0x4000, CRC(3c0a4eeb) SHA1(53742a5bef16e71bebefb0e43a175341f5bf0aa6) )	// banks = 28&68
	ROM_LOAD( "cc_p9.a2",      0xc000, 0x4000, CRC(b58c5f24) SHA1(7026b3d4f8060fd6607eb6d356d6b61cc9cb75c3) )	// banks = 30&70

	ROM_REGION( 0x6000, "gfx2", 0 )
	ROM_LOAD( "cc_p12.j8",     0x0000, 0x2000, CRC(9003a979) SHA1(f63959a9dc9ee67622865e783d2e501c640a4bed) )
	ROM_LOAD( "cc_p13.j5",     0x2000, 0x2000, CRC(a52cd549) SHA1(1902b8c107c5156113068ced74349ac576ac047c) )
	ROM_LOAD( "cc_p14.j2",     0x4000, 0x2000, CRC(edc6a1e8) SHA1(8c948a5f057e13bb9ed9738b66c702f45586fe59) )

	ROM_REGION( 0x0c00, "proms", 0 )
	ROM_LOAD( "cc_bprom3.j8",  0x0000, 0x0400, CRC(21f72498) SHA1(a586c869cb4633fec0df92b5646ece78f99b6f2a) )
	ROM_LOAD( "cc_bprom2.j9",  0x0400, 0x0400, CRC(19efe7df) SHA1(7e49af8b8b01fb929b87d6285da32fbe4c58606d) )
	ROM_LOAD( "cc_bprom1.j10", 0x0800, 0x0400, CRC(fbbbf911) SHA1(86394a7f67bc4f89f72b9607ca3733ab3d690289) )
ROM_END


GAME( 1984, mainsnk,   0,   mainsnk, mainsnk, 0,   ROT0, "SNK", "Main Event (1984)", 0)
GAME( 1985, canvas,    0,   mainsnk, canvas,  0,   ROT0, "SNK", "Canvas Croquis", 0)
