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AmigActive 10
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snowbros.c
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C/C++ Source or Header
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2000-04-04
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12KB
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377 lines
/***************************************************************************
Snow Brothers
driver by Mike Coates
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
#include "cpu/m68000/m68000.h"
#include "cpu/z80/z80.h"
static unsigned char *ram;
extern unsigned char *snowbros_spriteram;
void snowbros_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);
WRITE_HANDLER( snowbros_spriteram_w );
READ_HANDLER( snowbros_spriteram_r );
static int snowbros_interrupt(void)
{
return cpu_getiloops() + 2; /* IRQs 4, 3, and 2 */
}
static READ_HANDLER( snowbros_input_r )
{
int ans = 0xff;
switch (offset)
{
case 0:
ans = (input_port_0_r (offset) << 8) + (input_port_3_r (offset));
break;
case 2:
ans = (input_port_1_r (offset) << 8) + (input_port_4_r (offset));
break;
case 4:
ans = input_port_2_r (offset) << 8;
break;
}
return ans;
}
/* Sound Routines */
READ_HANDLER( snowbros_68000_sound_r )
{
int ret;
/* If the sound CPU is running, read the YM3812 status, otherwise
just make it pass the test */
if (Machine->sample_rate != 0)
{
ret = soundlatch_r(offset);
}
else
{
ret = 3;
}
return ret;
}
static WRITE_HANDLER( snowbros_68000_sound_w )
{
soundlatch_w(offset,data);
cpu_cause_interrupt(1,Z80_NMI_INT);
}
static struct MemoryReadAddress readmem[] =
{
{ 0x000000, 0x03ffff, MRA_ROM },
{ 0x100000, 0x103fff, MRA_BANK1 },
{ 0x300000, 0x300001, snowbros_68000_sound_r },
{ 0x500000, 0x500005, snowbros_input_r },
{ 0x600000, 0x6001ff, paletteram_word_r },
{ 0x700000, 0x701dff, snowbros_spriteram_r },
{ -1 } /* end of table */
};
static struct MemoryWriteAddress writemem[] =
{
{ 0x000000, 0x03ffff, MWA_ROM },
{ 0x100000, 0x103fff, MWA_BANK1, &ram },
{ 0x200000, 0x200001, watchdog_reset_w },
{ 0x300000, 0x300001, snowbros_68000_sound_w },
// { 0x400000, 0x400001, snowbros_interrupt_enable_w },
{ 0x600000, 0x6001ff, paletteram_xBBBBBGGGGGRRRRR_word_w, &paletteram },
{ 0x700000, 0x701dff, snowbros_spriteram_w, &snowbros_spriteram, &videoram_size },
{ 0x800000, 0x800001, MWA_NOP }, /* IRQ 4 acknowledge? */
{ 0x900000, 0x900001, MWA_NOP }, /* IRQ 3 acknowledge? */
{ 0xa00000, 0xa00001, MWA_NOP }, /* IRQ 2 acknowledge? */
{ -1 } /* end of table */
};
static struct MemoryReadAddress sound_readmem[] =
{
{ 0x0000, 0x7fff, MRA_ROM },
{ 0x8000, 0x87ff, MRA_RAM },
{ -1 } /* end of table */
};
static struct MemoryWriteAddress sound_writemem[] =
{
{ 0x0000, 0x7fff, MWA_ROM },
{ 0x8000, 0x87ff, MWA_RAM },
{ -1 } /* end of table */
};
static struct IOReadPort sound_readport[] =
{
{ 0x02, 0x02, YM3812_status_port_0_r },
{ 0x04, 0x04, soundlatch_r },
{ -1 } /* end of table */
};
static struct IOWritePort sound_writeport[] =
{
{ 0x02, 0x02, YM3812_control_port_0_w },
{ 0x03, 0x03, YM3812_write_port_0_w },
{ 0x04, 0x04, soundlatch_w }, /* goes back to the main CPU, checked during boot */
{ -1 } /* end of table */
};
INPUT_PORTS_START( snowbros )
PORT_START /* 500001 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN ) /* Must be low or game stops! */
/* probably VBlank */
PORT_START /* 500003 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY | IPF_PLAYER2 )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY | IPF_PLAYER2 )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY | IPF_PLAYER2 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER2 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER2 )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )
PORT_START /* 500005 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_TILT )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN3 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_START /* DSW 1 */
PORT_DIPNAME( 0x01, 0x01, "Country (Affects Coinage)" )
PORT_DIPSETTING( 0x01, "America" )
PORT_DIPSETTING( 0x00, "Europe" )
PORT_DIPNAME( 0x02, 0x02, DEF_STR( Flip_Screen ) )
PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_SERVICE( 0x04, IP_ACTIVE_LOW )
PORT_DIPNAME( 0x08, 0x08, DEF_STR( Demo_Sounds ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x08, DEF_STR( On ) )
/* Better to implement a coin mode 1-2 stuff later */
PORT_DIPNAME( 0x30, 0x30, "Coin A America/Europe" )
PORT_DIPSETTING( 0x10, "2C/1C 3C/1C" )
PORT_DIPSETTING( 0x30, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x00, "2C/3C 4C/1C" )
PORT_DIPSETTING( 0x20, "1C/2C 2C/1C" )
PORT_DIPNAME( 0xc0, 0xc0, "Coin B America/Europe" )
PORT_DIPSETTING( 0x40, "2C/1C 1C/4C" )
PORT_DIPSETTING( 0xc0, "1C/1C 1C/2C" )
PORT_DIPSETTING( 0x00, "2C/3C 1C/6C" )
PORT_DIPSETTING( 0x80, "1C/2C 1C/3C" )
PORT_START /* DSW 2 */
PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) )
PORT_DIPSETTING( 0x02, "Easy" )
PORT_DIPSETTING( 0x03, "Normal" )
PORT_DIPSETTING( 0x01, "Hard" )
PORT_DIPSETTING( 0x00, "Hardest" )
PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Bonus_Life ) )
PORT_DIPSETTING( 0x04, "100k and every 200k " )
PORT_DIPSETTING( 0x0c, "100k Only" )
PORT_DIPSETTING( 0x08, "200k Only" )
PORT_DIPSETTING( 0x00, "None" )
PORT_DIPNAME( 0x30, 0x30, DEF_STR( Lives ) )
PORT_DIPSETTING( 0x20, "1" )
PORT_DIPSETTING( 0x00, "2" )
PORT_DIPSETTING( 0x30, "3" )
PORT_DIPSETTING( 0x10, "4" )
PORT_BITX( 0x40, 0x40, IPT_DIPSWITCH_NAME | IPF_CHEAT, "Invulnerability", IP_KEY_NONE, IP_JOY_NONE )
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x80, "Allow Continue" )
PORT_DIPSETTING( 0x00, DEF_STR( No ) )
PORT_DIPSETTING( 0x80, DEF_STR( Yes ) )
INPUT_PORTS_END
static struct GfxLayout tilelayout =
{
16,16, /* 16*16 sprites */
4096, /* 4096 sprites */
4, /* 4 bits per pixel */
{ 0, 1, 2, 3 },
{
0, 4, 8, 12, 16, 20, 24, 28,
8*32+0, 8*32+4, 8*32+8, 8*32+12, 8*32+16, 8*32+20, 8*32+24, 8*32+28,
},
{
0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32,
16*32, 17*32, 18*32, 19*32, 20*32, 21*32, 22*32, 23*32
},
128*8
};
static struct GfxDecodeInfo gfxdecodeinfo[] =
{
{ REGION_GFX1, 0, &tilelayout, 0, 16 },
{ -1 } /* end of array */
};
/* handler called by the 3812 emulator when the internal timers cause an IRQ */
static void irqhandler(int linestate)
{
cpu_set_irq_line(1,0,linestate);
}
static struct YM3812interface ym3812_interface =
{
1, /* 1 chip */
3579545, /* 3.579545 MHz ? (hand tuned) */
{ 100 }, /* volume */
{ irqhandler },
};
static struct MachineDriver machine_driver_snowbros =
{
/* basic machine hardware */
{
{
CPU_M68000,
8000000, /* 8 Mhz ????? */
readmem,writemem,0,0,
snowbros_interrupt,3
},
{
CPU_Z80 | CPU_AUDIO_CPU,
3600000, /* 3.6 Mhz ??? */
sound_readmem,sound_writemem,sound_readport,sound_writeport,
ignore_interrupt,0 /* IRQs are caused by the YM3812 */
}
},
60, DEFAULT_60HZ_VBLANK_DURATION, /* frames per second, vblank duration */
1, /* 1 CPU slice per frame - interleaving is forced when a sound command is written */
0,
/* video hardware */
32*8, 32*8, { 0*8, 32*8-1, 2*8, 30*8-1 },
gfxdecodeinfo,
256, 256,
0,
VIDEO_TYPE_RASTER | VIDEO_SUPPORTS_DIRTY | VIDEO_MODIFIES_PALETTE,
0,
generic_vh_start,
generic_vh_stop,
snowbros_vh_screenrefresh,
/* sound hardware */
0,0,0,0,
{
{
SOUND_YM3812,
&ym3812_interface
},
}
};
/***************************************************************************
Game driver(s)
***************************************************************************/
ROM_START( snowbros )
ROM_REGION( 0x40000, REGION_CPU1 ) /* 6*64k for 68000 code */
ROM_LOAD_EVEN( "sn6.bin", 0x00000, 0x20000, 0x4899ddcf )
ROM_LOAD_ODD ( "sn5.bin", 0x00000, 0x20000, 0xad310d3f )
ROM_REGION( 0x10000, REGION_CPU2 ) /* 64k for z80 sound code */
ROM_LOAD( "snowbros.4", 0x0000, 0x8000, 0xe6eab4e4 )
ROM_REGION( 0x80000, REGION_GFX1 | REGIONFLAG_DISPOSE )
ROM_LOAD( "ch0", 0x00000, 0x20000, 0x36d84dfe )
ROM_LOAD( "ch1", 0x20000, 0x20000, 0x76347256 )
ROM_LOAD( "ch2", 0x40000, 0x20000, 0xfdaa634c )
ROM_LOAD( "ch3", 0x60000, 0x20000, 0x34024aef )
ROM_END
ROM_START( snowbroa )
ROM_REGION( 0x40000, REGION_CPU1 ) /* 6*64k for 68000 code */
ROM_LOAD_EVEN( "snowbros.3a", 0x00000, 0x20000, 0x10cb37e1 )
ROM_LOAD_ODD ( "snowbros.2a", 0x00000, 0x20000, 0xab91cc1e )
ROM_REGION( 0x10000, REGION_CPU2 ) /* 64k for z80 sound code */
ROM_LOAD( "snowbros.4", 0x0000, 0x8000, 0xe6eab4e4 )
ROM_REGION( 0x80000, REGION_GFX1 | REGIONFLAG_DISPOSE )
ROM_LOAD( "ch0", 0x00000, 0x20000, 0x36d84dfe )
ROM_LOAD( "ch1", 0x20000, 0x20000, 0x76347256 )
ROM_LOAD( "ch2", 0x40000, 0x20000, 0xfdaa634c )
ROM_LOAD( "ch3", 0x60000, 0x20000, 0x34024aef )
ROM_END
ROM_START( snowbrob )
ROM_REGION( 0x40000, REGION_CPU1 ) /* 6*64k for 68000 code */
ROM_LOAD_EVEN( "sbros3-a", 0x00000, 0x20000, 0x301627d6 )
ROM_LOAD_ODD ( "sbros2-a", 0x00000, 0x20000, 0xf6689f41 )
ROM_REGION( 0x10000, REGION_CPU2 ) /* 64k for z80 sound code */
ROM_LOAD( "snowbros.4", 0x0000, 0x8000, 0xe6eab4e4 )
ROM_REGION( 0x80000, REGION_GFX1 | REGIONFLAG_DISPOSE )
ROM_LOAD( "ch0", 0x00000, 0x20000, 0x36d84dfe )
ROM_LOAD( "ch1", 0x20000, 0x20000, 0x76347256 )
ROM_LOAD( "ch2", 0x40000, 0x20000, 0xfdaa634c )
ROM_LOAD( "ch3", 0x60000, 0x20000, 0x34024aef )
ROM_END
ROM_START( snowbroj )
ROM_REGION( 0x40000, REGION_CPU1 ) /* 6*64k for 68000 code */
ROM_LOAD_EVEN( "snowbros.3", 0x00000, 0x20000, 0x3f504f9e )
ROM_LOAD_ODD ( "snowbros.2", 0x00000, 0x20000, 0x854b02bc )
ROM_REGION( 0x10000, REGION_CPU2 ) /* 64k for z80 sound code */
ROM_LOAD( "snowbros.4", 0x0000, 0x8000, 0xe6eab4e4 )
ROM_REGION( 0x80000, REGION_GFX1 | REGIONFLAG_DISPOSE )
/* The gfx ROM (snowbros.1) was bad, I'm using the ones from the other sets. */
ROM_LOAD( "ch0", 0x00000, 0x20000, 0x36d84dfe )
ROM_LOAD( "ch1", 0x20000, 0x20000, 0x76347256 )
ROM_LOAD( "ch2", 0x40000, 0x20000, 0xfdaa634c )
ROM_LOAD( "ch3", 0x60000, 0x20000, 0x34024aef )
ROM_END
GAME( 1990, snowbros, 0, snowbros, snowbros, 0, ROT0, "Toaplan (Romstar license)", "Snow Bros. - Nick & Tom (set 1)" )
GAME( 1990, snowbroa, snowbros, snowbros, snowbros, 0, ROT0, "Toaplan (Romstar license)", "Snow Bros. - Nick & Tom (set 2)" )
GAME( 1990, snowbrob, snowbros, snowbros, snowbros, 0, ROT0, "Toaplan (Romstar license)", "Snow Bros. - Nick & Tom (set 3)" )
GAME( 1990, snowbroj, snowbros, snowbros, snowbros, 0, ROT0, "Toaplan (Romstar license)", "Snow Bros. - Nick & Tom (Japan)" )