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

Notes:
- Currently the Flip Screen dip switch only flips the screen horizontally.
  This might not be the correct behaviour. Verification of the real board
  would be necessary to emulate this accurately.

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

#include "driver.h"
#include "vidhrdw/generic.h"


PALETTE_INIT( nova2001 );
WRITE_HANDLER( pkunwar_flipscreen_w );
VIDEO_UPDATE( pkunwar );



static MEMORY_READ_START( readmem )
	{ 0x0000, 0x7fff, MRA_ROM },
	{ 0x8000, 0x8fff, MRA_RAM },
	{ 0xa001, 0xa001, AY8910_read_port_0_r },
	{ 0xa003, 0xa003, AY8910_read_port_1_r },
	{ 0xc000, 0xc7ff, MRA_RAM },
	{ 0xe000, 0xffff, MRA_ROM },
MEMORY_END

static MEMORY_WRITE_START( writemem )
	{ 0x0000, 0x7fff, MWA_ROM },
	{ 0x8000, 0x87ff, MWA_RAM, &spriteram, &spriteram_size },
	{ 0x8800, 0x8bff, videoram_w, &videoram, &videoram_size },
	{ 0x8c00, 0x8fff, colorram_w, &colorram },
	{ 0xa000, 0xa000, &AY8910_control_port_0_w },
	{ 0xa001, 0xa001, &AY8910_write_port_0_w },
	{ 0xa002, 0xa002, &AY8910_control_port_1_w },
	{ 0xa003, 0xa003, &AY8910_write_port_1_w },
	{ 0xc000, 0xc7ff, MWA_RAM },
	{ 0xe000, 0xffff, MWA_ROM },
MEMORY_END

static PORT_WRITE_START( writeport )
	{ 0x00, 0x00, pkunwar_flipscreen_w },
PORT_END



INPUT_PORTS_START( pkunwar )
	PORT_START	/* IN0 */
    PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_2WAY )
    PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_2WAY )
    PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 )
    PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
    PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
    PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
    PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
    PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_VBLANK )

	PORT_START	/* IN1 */
    PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_2WAY | IPF_COCKTAIL )
    PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_2WAY | IPF_COCKTAIL )
    PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_COCKTAIL )
    PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
    PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
    PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START2 )
	PORT_SERVICE( 0x40, IP_ACTIVE_LOW )
    PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )

	PORT_START	/* DSW0 */
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START	/* DSW1 */
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 1C_2C ) )
	PORT_DIPNAME( 0x04, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
	PORT_DIPNAME( 0x30, 0x30, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x10, "Easy" )
	PORT_DIPSETTING(    0x30, "Medium" )
	PORT_DIPSETTING(    0x20, "Hard" )
	PORT_DIPSETTING(    0x00, "Hardest" )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Free_Play ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END



static struct GfxLayout charlayout =
{
	8,8,	/* 8*8 characters */
	2048,	/* 2048 characters */
	4,	/* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0*4, 1*4, 2048*16*8, 2048*16*8 + 4, 2*4,  3*4, 2048*16*8 + 8, 2048*16*8 + 12 },
	{ 0*8, 2*8, 4*8, 6*8, 8*8, 10*8, 12*8, 14*8 },
	16*8
};

static struct GfxLayout spritelayout =
{
	16,16,	/* 16*16 sprites */
	512,	/* 512 sprites */
	4,	/* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0*4, 1*4, 512*64*8, 512*64*8 + 4, 2*4,  3*4, 512*64*8 + 8, 512*64*8 + 12,
			0*4+16*8, 1*4+16*8, 512*64*8+16*8, 512*64*8 + 4+16*8, 2*4+16*8,  3*4+16*8, 512*64*8 + 8 + 16*8, 512*64*8 + 12 + 16*8 },
	{ 0*8, 2*8, 4*8, 6*8, 8*8, 10*8, 12*8, 14*8,
			0*8+32*8, 2*8+32*8, 4*8+32*8, 6*8+32*8, 8*8+32*8, 10*8+32*8, 12*8+32*8, 14*8 + 32*8  },
	64*8
};

static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0x0000, &charlayout,   16*16, 16 },
	{ REGION_GFX1, 0x0000, &spritelayout,     0, 16 },
	{ -1 } /* end of array */
};



static struct AY8910interface ay8910_interface = {
	2,		/* 2 chips */
	3072000/2, // lax 11/03/1999  (1250000 -> 1536000 ???)
	{ 25, 25 },
	{ input_port_0_r, input_port_2_r },
	{ input_port_1_r, input_port_3_r },
	{ 0, 0 },
	{ 0, 0 }
};



static MACHINE_DRIVER_START( pkunwar )

	/* basic machine hardware */
	MDRV_CPU_ADD(Z80, 3072000)
	MDRV_CPU_MEMORY(readmem,writemem)
	MDRV_CPU_PORTS(0,writeport)
	MDRV_CPU_VBLANK_INT(irq0_line_hold,1)

	MDRV_FRAMES_PER_SECOND(60)
	MDRV_VBLANK_DURATION(DEFAULT_REAL_60HZ_VBLANK_DURATION)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 4*8, 28*8-1)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(32)
	MDRV_COLORTABLE_LENGTH(32*16)

	MDRV_PALETTE_INIT(nova2001)
	MDRV_VIDEO_START(generic)
	MDRV_VIDEO_UPDATE(pkunwar)

	/* sound hardware */
	MDRV_SOUND_ADD(AY8910, ay8910_interface)
MACHINE_DRIVER_END



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

  Game driver(s)

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

ROM_START( pkunwar )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for code */
	ROM_LOAD( "pkwar.01r",    0x0000, 0x4000, 0xce2d2c7b )
	ROM_LOAD( "pkwar.02r",    0x4000, 0x4000, 0xabc1f661 )
	ROM_LOAD( "pkwar.03r",    0xe000, 0x2000, 0x56faebea )

	ROM_REGION( 0x10000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "pkwar.01y",    0x0000, 0x2000, 0x428d3b92 )
	ROM_CONTINUE(             0x8000, 0x2000 )
	ROM_LOAD( "pkwar.02y",    0x2000, 0x2000, 0xce1da7bc )
	ROM_CONTINUE(             0xa000, 0x2000 )
	ROM_LOAD( "pkwar.03y",    0x4000, 0x2000, 0x63204400 )
	ROM_CONTINUE(             0xc000, 0x2000 )
	ROM_LOAD( "pkwar.04y",    0x6000, 0x2000, 0x061dfca8 )
	ROM_CONTINUE(             0xe000, 0x2000 )

	ROM_REGION( 0x0020, REGION_PROMS, 0 )
	ROM_LOAD( "pkwar.col",    0x0000, 0x0020, 0xaf0fc5e2 )
ROM_END

ROM_START( pkunwarj )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for code */
	ROM_LOAD( "pgunwar.6",    0x0000, 0x4000, 0x357f3ef3 )
	ROM_LOAD( "pgunwar.5",    0x4000, 0x4000, 0x0092e49e )
	ROM_LOAD( "pkwar.03r",    0xe000, 0x2000, 0x56faebea )

	ROM_REGION( 0x10000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "pkwar.01y",    0x0000, 0x2000, 0x428d3b92 )
	ROM_CONTINUE(             0x8000, 0x2000 )
	ROM_LOAD( "pkwar.02y",    0x2000, 0x2000, 0xce1da7bc )
	ROM_CONTINUE(             0xa000, 0x2000 )
	ROM_LOAD( "pgunwar.2",    0x4000, 0x2000, 0xa2a43443 )
	ROM_CONTINUE(             0xc000, 0x2000 )
	ROM_LOAD( "pkwar.04y",    0x6000, 0x2000, 0x061dfca8 )
	ROM_CONTINUE(             0xe000, 0x2000 )

	ROM_REGION( 0x0020, REGION_PROMS, 0 )
	ROM_LOAD( "pkwar.col",    0x0000, 0x0020, 0xaf0fc5e2 )
ROM_END



GAME( 1985?, pkunwar,  0,       pkunwar, pkunwar, 0, ROT0, "UPL", "Penguin-Kun Wars (US)" )
GAME( 1985?, pkunwarj, pkunwar, pkunwar, pkunwar, 0, ROT0, "UPL", "Penguin-Kun Wars (Japan)" )
