dec8.c

这个是延伸mame的在wince平台下的游戏模拟器的代码

static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ 1, 0x000000, &charlayout_32k,     0, 4  },
	{ 1, 0x008000, &tiles,   64, 4 },
	{ 1, 0x088000, &tiles,  192, 4 },
	{ 1, 0x108000, &tiles,  128, 4 },
	{ -1 } /* end of array */
};

static struct GfxDecodeInfo ghostb_gfxdecodeinfo[] =
{
	{ 1, 0x00000, &chars_3bpp,	0,  4 },
	{ 1, 0x08000, &tiles,     256, 16 },
	{ 1, 0x88000, &tiles_r,   512, 16 },
	{ -1 } /* end of array */
};

static struct GfxDecodeInfo srdarwin_gfxdecodeinfo[] =
{
	{ 1, 0x00000, &charlayout_16k,128, 32  },
	{ 1, 0x08000, &sr_sprites,     64, 8 }, 
	{ 1, 0x38000, &srdarwin_tiles,  0, 8 },
  	{ 1, 0x48000, &srdarwin_tiles,  0, 8 },
    { 1, 0x58000, &srdarwin_tiles,  0, 8 }, 
    { 1, 0x68000, &srdarwin_tiles,  0, 8 },
	{ -1 } /* end of array */
};

static struct GfxDecodeInfo gondo_gfxdecodeinfo[] =
{
	{ 1, 0x00000, &chars_3bpp,  0, 16 }, /* Chars */
	{ 1, 0x08000, &tiles,     256, 16 }, /* Sprites */
	{ 1, 0x88000, &tiles,     768, 16 }, /* Tiles */
 	{ -1 } /* end of array */
};

static struct GfxDecodeInfo oscar_gfxdecodeinfo[] =
{
	{ 1, 0x00000, &oscar_charlayout, 256,  8 }, /* Chars */
	{ 1, 0x08000, &tiles,              0, 16 }, /* Sprites */
	{ 1, 0x88000, &tiles,            384,  8 }, /* Tiles */
 	{ -1 } /* end of array */
};

static struct GfxDecodeInfo lastmiss_gfxdecodeinfo[] =
{
	{ 1, 0x00000, &chars_3bpp,0, 4 },
	{ 1, 0x08000, &tiles,  256, 16 },
	{ 1, 0x88000, &tiles,  768, 16 },
 	{ -1 } /* end of array */
};

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

static struct YM2203interface ym2203_interface =
{
	1,
	1500000,	/* Unknown */
	{ YM2203_VOL(30,40) },
	{ 0 },
	{ 0 },
	{ 0 },
	{ 0 }
};

/* handler called by the 3812 emulator when the internal timers cause an IRQ */
static void irqhandler(void)
{
	cpu_cause_interrupt(1,M6502_INT_IRQ);
}

static void oscar_irqhandler(void)
{
	cpu_cause_interrupt(2,M6502_INT_IRQ);
}

static struct YM3526interface ym3526_interface =
{
	1,			/* 1 chip (no more supported) */
	3000000,	/* 3 MHz ? */
	{ 255 },	/* (not supported) */
	irqhandler,
};

static struct YM3526interface oscar_ym3526_interface =
{
	1,			/* 1 chip (no more supported) */
	3000000,	/* 3 MHz ? */
	{ 255 },		/* (not supported) */
	oscar_irqhandler,
};

static struct YM3812interface ym3812_interface =
{
	1,			/* 1 chip (no more supported) */
	3000000,	/* 3 MHz ? */
	{ 255 },		/* (not supported) */
	irqhandler,
};

static struct MSM5205interface msm5205_interface =
{
	1,		/* 1 chip */
	8000,	/* 8000Hz playback ? */
	csilver_adpcm_int,		/* interrupt function */
	{ 99 }
};

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

static int ghostb_interrupt(void)
{
	static int latch[4];
	int i8751_out=readinputport(4);

	/* Ghostbusters coins are controlled by the i8751 */
	if ((i8751_out & 0x8) == 0x8) latch[0]=1;
	if ((i8751_out & 0x4) == 0x4) latch[1]=1;
	if ((i8751_out & 0x2) == 0x2) latch[2]=1;
	if ((i8751_out & 0x1) == 0x1) latch[3]=1;

	if (((i8751_out & 0x8) != 0x8) && latch[0]) {latch[0]=0; cpu_cause_interrupt(0,M6809_INT_IRQ); i8751_return=0x8001; } /* Player 1 coin */
	if (((i8751_out & 0x4) != 0x4) && latch[1]) {latch[1]=0; cpu_cause_interrupt(0,M6809_INT_IRQ); i8751_return=0x4001; } /* Player 2 coin */
	if (((i8751_out & 0x2) != 0x2) && latch[2]) {latch[2]=0; cpu_cause_interrupt(0,M6809_INT_IRQ); i8751_return=0x2001; } /* Player 3 coin */
	if (((i8751_out & 0x1) != 0x1) && latch[3]) {latch[3]=0; cpu_cause_interrupt(0,M6809_INT_IRQ); i8751_return=0x1001; } /* Service */

	if (nmi_enable) return M6809_INT_NMI; /* VBL */

	return 0; /* VBL */
}

static int gondo_interrupt(void)
{
	if (nmi_enable)
		return M6809_INT_NMI; /* VBL */

	return 0; /* VBL */
}

/* Coins generate NMI's */
static int oscar_interrupt(void)
{
	static int latch=1;

	if ((readinputport(2) & 0x7) == 0x7) latch=1;
	if (latch && (readinputport(2) & 0x7) != 0x7) {
		latch=0;
    	cpu_cause_interrupt (0, M6809_INT_NMI);
    }

	return 0;
}

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

static struct MachineDriver cobra_machine_driver =
{
	/* basic machine hardware */
	{
 		{
			CPU_M6809,
			1250000,
			0,
			cobra_readmem,cobra_writemem,0,0,
			nmi_interrupt,1
		},
		{
			CPU_M6502 | CPU_AUDIO_CPU,
			1250000,        /* 1.25 Mhz ? */
			2,	/* memory region #2 */
			dec8_s_readmem,dec8_s_writemem,0,0,
			ignore_interrupt,0	/* IRQs are caused by the YM3812 */
								/* NMIs are caused by the main CPU */
		}
	},
	60, DEFAULT_REAL_60HZ_VBLANK_DURATION,
	1,
	0,	/* init machine */

	/* video hardware */
	32*8, 32*8, { 0*8, 32*8-1, 1*8, 31*8-1 },
  

	gfxdecodeinfo,
	256,256,
	0,

	VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE | VIDEO_UPDATE_BEFORE_VBLANK,
	0,
	dec8_vh_start,
	dec8_vh_stop,
	dec8_vh_screenrefresh,

	/* sound hardware */
	0,0,0,0,
	{
		{
			SOUND_YM2203,
			&ym2203_interface
		},
		{
			SOUND_YM3812,
			&ym3812_interface
		}
	}
};

static struct MachineDriver ghostb_machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_M6809,  /* Really HD6309 */
			2000000,
			0,
			ghostb_readmem,ghostb_writemem,0,0,
			ghostb_interrupt,1
		},
		{
			CPU_M6502 | CPU_AUDIO_CPU,
			1250000,        /* 1.25 Mhz ? */
			2,	/* memory region #2 */
			dec8_s_readmem,dec8_s_writemem,0,0,
			ignore_interrupt,0	/* IRQs are caused by the YM3812 */
								/* NMIs are caused by the main CPU */
		}
	},
	60, DEFAULT_REAL_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,	/* 1 CPU slice per frame - interleaving is forced when a sound command is written */
	0,	/* init machine */

	/* video hardware */
  	32*8, 32*8, { 0*8, 32*8-1, 1*8, 31*8-1 },

	ghostb_gfxdecodeinfo,
	1024,1024,
	ghostb_vh_convert_color_prom,

	VIDEO_TYPE_RASTER | VIDEO_UPDATE_BEFORE_VBLANK,
	0,
	dec8_vh_start,
	dec8_vh_stop,
	ghostb_vh_screenrefresh,

	/* sound hardware */
	0,0,0,0,
	{
		{
			SOUND_YM2203,
			&ym2203_interface
		},
		{
			SOUND_YM3812,
			&ym3812_interface
		}
	}
};

static struct MachineDriver srdarwin_machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_M6809,  /* MC68A09EP */
			2000000,
			0,
			srdarwin_readmem,srdarwin_writemem,0,0,
			nmi_interrupt,1
		},
		{
			CPU_M6502 | CPU_AUDIO_CPU,
			1250000,        /* 1.25 Mhz ? */
			2,	/* memory region #2 */
			dec8_s_readmem,dec8_s_writemem,0,0,
			ignore_interrupt,0	/* IRQs are caused by the YM3812 */
								/* NMIs are caused by the main CPU */
		}
	},
	60, DEFAULT_REAL_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,	/* 1 CPU slice per frame - interleaving is forced when a sound command is written */
	0,	/* init machine */

	/* video hardware */
  	32*8, 32*8, { 0*8, 32*8-1, 1*8, 31*8-1 },

	srdarwin_gfxdecodeinfo,
	144,144,
	0,

	VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE | VIDEO_UPDATE_BEFORE_VBLANK,
	0,
	dec8_vh_start,
	dec8_vh_stop,
	srdarwin_vh_screenrefresh,

	/* sound hardware */
	0,0,0,0,
	{
		{
			SOUND_YM2203,
			&ym2203_interface
		},
		{
			SOUND_YM3812,
			&ym3812_interface
		}
	}
};

static struct MachineDriver gondo_machine_driver =
{
	/* basic machine hardware */
	{
 		{
			CPU_M6809,
			3000000,
			0,
			gondo_readmem,gondo_writemem,0,0,
			gondo_interrupt,1
		},
		{
			CPU_M6502 | CPU_AUDIO_CPU,
			1250000,        /* 1.25 Mhz ? */
			2,	/* memory region #2 */
			dec8_s_readmem,dec8_s_writemem,0,0,
			ignore_interrupt,0	/* IRQs are caused by the YM3526 */
								/* NMIs are caused by the main CPU */
		}
	},
	60, DEFAULT_REAL_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,	/* 1 CPU slice per frame - interleaving is forced when a sound command is written */
	0,	/* init machine */

	/* video hardware */
	32*8, 32*8, { 0*8, 32*8-1, 1*8, 31*8-1 },

	gondo_gfxdecodeinfo,
	1024,1024,
	0,

	VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE | VIDEO_UPDATE_BEFORE_VBLANK,
	0,
	dec8_vh_start,
	dec8_vh_stop,
	gondo_vh_screenrefresh,

	/* sound hardware */
	0,0,0,0,
	{
		{
			SOUND_YM2203,
			&ym2203_interface
		},
		{
			SOUND_YM3526,
			&ym3526_interface
		}
	}
};

static struct MachineDriver oscar_machine_driver =
{
	/* basic machine hardware */
	{
	  	{
			CPU_M6809,
			2000000,
			0,
			oscar_readmem,oscar_writemem,0,0,
			oscar_interrupt,1
		},
	 	{
			CPU_M6809,
			2000000,
			3,
			oscar_sub_readmem,oscar_sub_writemem,0,0,
			ignore_interrupt,0
		},
		{
			CPU_M6502 | CPU_AUDIO_CPU,
			1250000,        /* 1.25 Mhz ? */
			2,	/* memory region #2 */
			dec8_s_readmem,dec8_s_writemem,0,0,
			ignore_interrupt,0	/* IRQs are caused by the YM3526 */
								/* NMIs are caused by the main CPU */
		}
	},
	60, DEFAULT_REAL_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,	/* 1 CPU slice per frame - interleaving is forced when a sound command is written */
	/* 100, // 100 CPU slices per frame *