gundealr.c

这个是延伸mame的在wince平台下的游戏模拟器的代码

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

Gun Dealer memory map (preliminary)

0000-bfff ROM
c400-c7ff Palette RAM
d000-d1ff foreground (scrollable) video RAM. It might actually be larger than
          this, however the game leaves the area d200-dfff empty so I have no
		  way to figure out how it should be displayed.
c800-cfff background video RAM
d000-dfff RAM
e000-ffff RAM

read:
c000      DSW0
c001      DSW1
c004      COIN
c005      IN1
c006      IN0

write:
c014      flip screen ??
c020-c021 foreground scroll x
c022-c023 foreground scroll y

I/O:
read:
01        YM2203 read

write:
00        YM2203 control
01        YM2203 write

Interrupts:
Runs in interrupt mode 0, the interrupt vectors are 0xcf (RST 08h) and
0xd7 (RST 10h)

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

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


extern unsigned char *gundealr_bsvideoram;
extern unsigned char *gundealr_bigspriteram;

void gundealr_paletteram_w(int offset,int data);
void gundealr_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);



static int gundealr_interrupt(void)
{
	if (cpu_getiloops() == 0) return 0xd7;	/* vblank */
	if ((cpu_getiloops() & 1) == 1) return 0xcf;	/* sound (hand tuned) */
	else return ignore_interrupt();
}


static struct MemoryReadAddress readmem[] =
{
	{ 0x0000, 0xbfff, MRA_ROM },
	{ 0xc000, 0xc000, input_port_0_r },	/* DSW0 */
	{ 0xc001, 0xc001, input_port_1_r },	/* DSW1 */
	{ 0xc004, 0xc004, input_port_2_r },	/* COIN */
	{ 0xc005, 0xc005, input_port_3_r },	/* IN1 */
	{ 0xc006, 0xc006, input_port_4_r },	/* IN0 */
	{ 0xe000, 0xffff, MRA_RAM },
	{ -1 }	/* end of table */
};

static struct MemoryWriteAddress writemem[] =
{
	{ 0x0000, 0xbfff, MWA_ROM },
	{ 0xc020, 0xc023, MWA_RAM, &gundealr_bigspriteram },
	{ 0xd000, 0xd1ff, MWA_RAM, &gundealr_bsvideoram },
	{ 0xc400, 0xc7ff, gundealr_paletteram_w, &paletteram },
	{ 0xc800, 0xcfff, videoram_w, &videoram, &videoram_size },
	{ 0xe000, 0xffff, MWA_RAM },
	{ -1 }	/* end of table */
};

static struct IOReadPort readport[] =
{
	{ 0x01, 0x01, YM2203_read_port_0_r },
	{ -1 }	/* end of table */
};

static struct IOWritePort writeport[] =
{
	{ 0x00, 0x00, YM2203_control_port_0_w },
	{ 0x01, 0x01, YM2203_write_port_0_w },
	{ -1 }	/* end of table */
};



INPUT_PORTS_START( input_ports )
	PORT_START	/* DSW0 */
	PORT_DIPNAME( 0x01, 0x01, "Unknown", IP_KEY_NONE )
	PORT_DIPSETTING(    0x01, "Off" )
	PORT_DIPSETTING(    0x00, "On" )
	PORT_DIPNAME( 0x02, 0x02, "Unknown", IP_KEY_NONE )
	PORT_DIPSETTING(    0x02, "Off" )
	PORT_DIPSETTING(    0x00, "On" )
	PORT_DIPNAME( 0x0c, 0x0c, "Difficulty", IP_KEY_NONE )
	PORT_DIPSETTING(    0x0c, "Easy" )
	PORT_DIPSETTING(    0x08, "Medium" )
	PORT_DIPSETTING(    0x04, "Hard" )
	PORT_DIPSETTING(    0x00, "Hardest" )
	PORT_DIPNAME( 0x10, 0x10, "Demo Sounds", IP_KEY_NONE )
	PORT_DIPSETTING(    0x10, "Off" )
	PORT_DIPSETTING(    0x00, "On" )
	PORT_DIPNAME( 0x20, 0x20, "Unknown", IP_KEY_NONE )
	PORT_DIPSETTING(    0x20, "Off" )
	PORT_DIPSETTING(    0x00, "On" )
	PORT_DIPNAME( 0x40, 0x40, "Unknown", IP_KEY_NONE )
	PORT_DIPSETTING(    0x40, "Off" )
	PORT_DIPSETTING(    0x00, "On" )
	PORT_DIPNAME( 0x80, 0x80, "Flip Screen?", IP_KEY_NONE )
	PORT_DIPSETTING(    0x80, "Off" )
	PORT_DIPSETTING(    0x00, "On" )

	PORT_START	/* DSW1 */
	PORT_DIPNAME( 0x07, 0x07, "Coin A", IP_KEY_NONE )
	PORT_DIPSETTING(    0x00, "5 Coins/1 Credit" )
	PORT_DIPSETTING(    0x01, "4 Coins/1 Credit" )
	PORT_DIPSETTING(    0x02, "3 Coins/1 Credit" )
	PORT_DIPSETTING(    0x03, "2 Coins/1 Credit" )
	PORT_DIPSETTING(    0x07, "1 Coin/1 Credit" )
	PORT_DIPSETTING(    0x06, "1 Coin/2 Credits" )
	PORT_DIPSETTING(    0x05, "1 Coin/3 Credits" )
	PORT_DIPSETTING(    0x04, "1 Coin/4 Credits" )
	PORT_DIPNAME( 0x38, 0x38, "Coin B", IP_KEY_NONE )
	PORT_DIPSETTING(    0x00, "5 Coins/1 Credit" )
	PORT_DIPSETTING(    0x08, "4 Coins/1 Credit" )
	PORT_DIPSETTING(    0x10, "3 Coins/1 Credit" )
	PORT_DIPSETTING(    0x18, "2 Coins/1 Credit" )
	PORT_DIPSETTING(    0x38, "1 Coin/1 Credit" )
	PORT_DIPSETTING(    0x30, "1 Coin/2 Credits" )
	PORT_DIPSETTING(    0x28, "1 Coin/3 Credits" )
	PORT_DIPSETTING(    0x20, "1 Coin/4 Credits" )
	PORT_DIPNAME( 0xc0, 0xc0, "Unknown", IP_KEY_NONE )
	PORT_DIPSETTING(    0x00, "0" )
	PORT_DIPSETTING(    0x40, "1" )
	PORT_DIPSETTING(    0x80, "2" )
	PORT_DIPSETTING(    0xc0, "3" )

	PORT_START	/* COIN */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN3 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START	/* IN1 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_4WAY | IPF_PLAYER2 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_4WAY | IPF_PLAYER2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_4WAY | IPF_PLAYER2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_4WAY | 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_UNKNOWN )	/* probably unused */
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )	/* probably unused */

	PORT_START	/* IN0 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_4WAY | IPF_PLAYER1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_4WAY | IPF_PLAYER1 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_4WAY | IPF_PLAYER1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_4WAY | IPF_PLAYER1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )	/* probably unused */
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )	/* probably unused */
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, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4 },
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 },
	32*8	/* every char takes 32 consecutive bytes */
};

static struct GfxLayout spritelayout =
{
	16,16,	/* 16*16 sprites */
	1024,	/* 1024 sprites */
	4,	/* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0*4, 1*4, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4,
			16*32+0*4, 16*32+1*4, 16*32+2*4, 16*32+3*4, 16*32+4*4, 16*32+5*4, 16*32+6*4, 16*32+7*4 },
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32,
			8*32, 9*32, 10*32, 11*32, 12*32, 13*32, 14*32, 15*32 },
	128*8	/* every sprite takes 128 consecutive bytes */
};

static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ 1, 0x00000, &charlayout,     0, 16 },	/* colors 0-255 */
	{ 1, 0x10000, &spritelayout, 256, 16 },	/* colors 256-511 */
	{ -1 } /* end of array */
};



static struct YM2203interface ym2203_interface =
{
	1,			/* 1 chip */
	1500000,	/* 1.5 MHz ?????? */
	{ YM2203_VOL(255,255) },
	{ 0 },
	{ 0 },
	{ 0 },
	{ 0 }
};



static struct MachineDriver machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_Z80,
			8000000,	/* 8 Mhz ??? */
			0,
			readmem,writemem,readport,writeport,
			gundealr_interrupt,4	/* ? */
		}
	},
	60, DEFAULT_60HZ_VBLANK_DURATION,	/* frames per second, vblank duration */
	1,	/* single CPU, no need for interleaving */
	0,

	/* video hardware */
	32*8, 32*8, { 0*8, 32*8-1, 2*8, 30*8-1 },
	gfxdecodeinfo,
	512, 512,
	0,

	VIDEO_TYPE_RASTER | VIDEO_SUPPORTS_DIRTY | VIDEO_MODIFIES_PALETTE,
	0,
	generic_vh_start,
	generic_vh_stop,
	gundealr_vh_screenrefresh,

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



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

  Game driver(s)

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

ROM_START( gundealr_rom )
	ROM_REGION(0x10000)	/* 64k for code */
	ROM_LOAD( "gundealr.1",   0x0000, 0x10000, 0x5797e830 )

	ROM_REGION_DISPOSE(0x30000)	/* temporary space for graphics (disposed after conversion) */
	ROM_LOAD( "gundealr.3",   0x00000, 0x10000, 0x01f99de2 )
	ROM_LOAD( "gundealr.2",   0x10000, 0x20000, 0x7874ec41 )
ROM_END


ROM_START( gundeala_rom )
	ROM_REGION(0x10000)	/* 64k for code */
        ROM_LOAD( "gundeala.1",   0x0000, 0x10000, 0xd87e24f1 )

	ROM_REGION_DISPOSE(0x30000)	/* temporary space for graphics (disposed after conversion) */
        ROM_LOAD( "gundeala.3",   0x00000, 0x10000, 0x836cf1a3 )
        ROM_LOAD( "gundeala.2",   0x10000, 0x20000, 0x4b5fb53c )
ROM_END


struct GameDriver gundealr_driver =
{
	__FILE__,
	0,
	"gundealr",
	"Gun Dealer (set 1)",
	"1990",
	"Dooyong",
	"Nicola Salmoria",
	0,
	&machine_driver,
	0,

	gundealr_rom,
	0, 0,
	0,
	0,	/* sound_prom */

	input_ports,

	0, 0, 0,
	ORIENTATION_ROTATE_270,

	0, 0
};

struct GameDriver gundeala_driver =
{
	__FILE__,
	&gundealr_driver,
	"gundeala",
	"Gun Dealer (set 2)",
	"????",
	"Dooyong",
	"Nicola Salmoria",
	0,
	&machine_driver,
	0,

	gundeala_rom,
	0, 0,
	0,
	0,	/* sound_prom */

	input_ports,

	0, 0, 0,
	ORIENTATION_ROTATE_270,

	0, 0
};