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cloud9.c
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C/C++ Source or Header
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2000-05-04
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9KB
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299 lines
/***************************************************************************
Cloud9 (prototype) driver.
This hardware is yet another variant of the Centipede/Millipede hardware,
but as you can see there are some significant deviations...
0000 R/W X index into the bitmap
0001 R/W Y index into the bitmap
0002 R/W Current bitmap pixel value
0003-05FF R/W RAM
0600-3FFF R/W Bitmap RAM bank 0 (and bank 1 ?)
5000-5073 R/W Motion Object RAM
5400 W Watchdog
5480 W IRQ Acknowledge
5500-557F W Color RAM (9 bits, 4 banks, LSB of Blue is addr&$40)
5580 W Auto-increment X bitmap index (~D7)
5581 W Auto-increment Y bitmap index (~D7)
5584 W VRAM Both Banks - (D7) seems to allow writing to both banks
5585 W Invert screen?
5586 W VRAM Bank select?
5587 W Color bank select
5600 W Coin Counter 1 (D7)
5601 W Coin Counter 2 (D7)
5602 W Start1 LED (~D7)
5603 W Start2 LED (~D7)
5680 W Force Write to EAROM?
5700 W EAROM Off?
5780 W EAROM On?
5800 R IN0 (D7=Vblank, D6=Right Coin, D5=Left Coin, D4=Aux, D3=Self Test)
5801 R IN1 (D7=Start1, D6=Start2, D5=Fire, D4=Zap)
5900 R Trackball Vert
5901 R Trackball Horiz
5A00-5A0F R/W Pokey 1
5B00-5B0F R/W Pokey 2
5C00-5CFF W EAROM
6000-FFFF R Program ROM
If you have any questions about how this driver works, don't hesitate to
ask. - Mike Balfour (mab22@po.cwru.edu)
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
WRITE_HANDLER( cloud9_paletteram_w );
READ_HANDLER( cloud9_bitmap_regs_r );
WRITE_HANDLER( cloud9_bitmap_regs_w );
WRITE_HANDLER( cloud9_bitmap_w );
extern void cloud9_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);
extern unsigned char *cloud9_vram2;
extern unsigned char *cloud9_bitmap_regs;
extern unsigned char *cloud9_auto_inc_x;
extern unsigned char *cloud9_auto_inc_y;
extern unsigned char *cloud9_both_banks;
extern unsigned char *cloud9_vram_bank;
extern unsigned char *cloud9_color_bank;
static unsigned char *nvram;
static size_t nvram_size;
static void nvram_handler(void *file,int read_or_write)
{
if (read_or_write)
osd_fwrite(file,nvram,nvram_size);
else
{
if (file)
osd_fread(file,nvram,nvram_size);
else
memset(nvram,0,nvram_size);
}
}
static WRITE_HANDLER( cloud9_led_w )
{
// osd_led_w(offset,~data >> 7);
}
static struct MemoryReadAddress readmem[] =
{
{ 0x0000, 0x0002, cloud9_bitmap_regs_r },
{ 0x0003, 0x05ff, MRA_RAM },
{ 0x0600, 0x3fff, MRA_RAM },
{ 0x5500, 0x557f, MRA_RAM },
{ 0x5800, 0x5800, input_port_0_r },
{ 0x5801, 0x5801, input_port_1_r },
{ 0x5900, 0x5900, input_port_2_r },
{ 0x5901, 0x5901, input_port_3_r },
{ 0x5a00, 0x5a0f, pokey1_r },
{ 0x5b00, 0x5b0f, pokey2_r },
{ 0x5c00, 0x5cff, MRA_RAM }, /* EAROM */
{ 0x6000, 0xffff, MRA_ROM },
{ -1 } /* end of table */
};
static struct MemoryWriteAddress writemem[] =
{
{ 0x0000, 0x0002, cloud9_bitmap_regs_w, &cloud9_bitmap_regs },
{ 0x0003, 0x05ff, MWA_RAM },
{ 0x0600, 0x3fff, cloud9_bitmap_w, &videoram, &videoram_size },
{ 0x5000, 0x50ff, MWA_RAM, &spriteram },
{ 0x5400, 0x5400, watchdog_reset_w },
{ 0x5480, 0x5480, MWA_NOP }, /* IRQ Ack */
{ 0x5500, 0x557f, cloud9_paletteram_w, &paletteram },
{ 0x5580, 0x5580, MWA_RAM, &cloud9_auto_inc_x },
{ 0x5581, 0x5581, MWA_RAM, &cloud9_auto_inc_y },
{ 0x5584, 0x5584, MWA_RAM, &cloud9_both_banks },
{ 0x5586, 0x5586, MWA_RAM, &cloud9_vram_bank },
{ 0x5587, 0x5587, MWA_RAM, &cloud9_color_bank },
{ 0x5600, 0x5601, coin_counter_w },
{ 0x5602, 0x5603, cloud9_led_w },
{ 0x5a00, 0x5a0f, pokey1_w },
{ 0x5b00, 0x5b0f, pokey2_w },
{ 0x5c00, 0x5cff, MWA_RAM, &nvram, &nvram_size },
{ 0x6000, 0xffff, MWA_ROM },
{ 0x10600,0x13fff, MWA_RAM, &cloud9_vram2 },
{ -1 } /* end of table */
};
INPUT_PORTS_START( cloud9 )
PORT_START /* IN0 */
PORT_BIT ( 0x07, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_SERVICE( 0x08, IP_ACTIVE_LOW )
PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_COIN3 )
PORT_BIT ( 0x20, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT ( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_BIT ( 0x80, IP_ACTIVE_LOW, IPT_VBLANK )
PORT_START /* IN1 */
PORT_BIT ( 0x0F, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 )
PORT_BIT ( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT ( 0x40, IP_ACTIVE_LOW, IPT_START2 )
PORT_BIT ( 0x80, IP_ACTIVE_LOW, IPT_START1 )
PORT_START /* IN2 */
PORT_ANALOG( 0xff, 0x7f, IPT_TRACKBALL_Y | IPF_REVERSE, 30, 30, 0, 0 )
PORT_START /* IN3 */
PORT_ANALOG( 0xff, 0x7f, IPT_TRACKBALL_X, 30, 30, 0, 0 )
PORT_START /* IN4 */ /* DSW1 */
PORT_BIT ( 0xFF, IP_ACTIVE_HIGH, IPT_UNKNOWN )
PORT_START /* IN5 */ /* DSW2 */
PORT_BIT ( 0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN )
PORT_DIPNAME( 0x06, 0x04, DEF_STR( Coinage ) )
PORT_DIPSETTING ( 0x06, DEF_STR( 2C_1C ) )
PORT_DIPSETTING ( 0x04, DEF_STR( 1C_1C ) )
PORT_DIPSETTING ( 0x02, DEF_STR( 1C_2C ) )
PORT_DIPSETTING ( 0x00, DEF_STR( Free_Play ) )
PORT_DIPNAME(0x18, 0x00, "Right Coin" )
PORT_DIPSETTING ( 0x00, "*1" )
PORT_DIPSETTING ( 0x08, "*4" )
PORT_DIPSETTING ( 0x10, "*5" )
PORT_DIPSETTING ( 0x18, "*6" )
PORT_DIPNAME(0x20, 0x00, "Middle Coin" )
PORT_DIPSETTING ( 0x00, "*1" )
PORT_DIPSETTING ( 0x20, "*2" )
PORT_DIPNAME(0xC0, 0x00, "Bonus Coins" )
PORT_DIPSETTING ( 0xC0, "4 coins + 2 coins" )
PORT_DIPSETTING ( 0x80, "4 coins + 1 coin" )
PORT_DIPSETTING ( 0x40, "2 coins + 1 coin" )
PORT_DIPSETTING ( 0x00, "None" )
INPUT_PORTS_END
static struct GfxLayout charlayout =
{
8,8, /* 8*8 characters */
128, /* 128 characters */
4, /* 4 bits per pixel */
{ 0x3000*8, 0x2000*8, 0x1000*8, 0 }, /* the four bitplanes are separated */
{ 0, 1, 2, 3, 4, 5, 6, 7 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
16*8 /* every char takes 8 consecutive bytes, then skip 8 */
};
static struct GfxLayout spritelayout =
{
16,16, /* 16*16 sprites */
64, /* 64 sprites */
4, /* 4 bits per pixel */
{ 0x3000*8, 0x2000*8, 0x1000*8, 0x0000*8 }, /* the four bitplanes are separated */
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
{ 0*8, 2*8, 4*8, 6*8, 8*8, 10*8, 12*8, 14*8,
16*8, 18*8, 20*8, 22*8, 24*8, 26*8, 28*8, 30*8 },
32*8 /* every sprite takes 32 consecutive bytes */
};
static struct GfxDecodeInfo gfxdecodeinfo[] =
{
{ REGION_GFX1, 0x0800, &charlayout, 0, 4 },
{ REGION_GFX1, 0x0808, &charlayout, 0, 4 },
{ REGION_GFX1, 0x0000, &spritelayout, 0, 4 },
{ -1 } /* end of array */
};
static struct POKEYinterface pokey_interface =
{
2, /* 2 chips */
1500000, /* 1.5 MHz??? */
{ 50, 50 },
/* The 8 pot handlers */
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
/* The allpot handler */
{ input_port_4_r, input_port_5_r },
};
static struct MachineDriver machine_driver_cloud9 =
{
/* basic machine hardware */
{
{
CPU_M6502,
12096000/8, /* 1.512 Mhz?? */
readmem,writemem,0,0,
interrupt,4
}
},
60, 1460, /* 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, 32*8-1 },
gfxdecodeinfo,
64, 64,
0,
VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE,
0,
generic_bitmapped_vh_start,
generic_bitmapped_vh_stop,
cloud9_vh_screenrefresh,
/* sound hardware */
0,0,0,0,
{
{
SOUND_POKEY,
&pokey_interface
}
},
nvram_handler
};
/***************************************************************************
Game ROMs
***************************************************************************/
ROM_START( cloud9 )
ROM_REGION( 0x14000, REGION_CPU1 ) /* 64k for code + extra VRAM space */
ROM_LOAD( "c9_6000.bin", 0x6000, 0x2000, 0xb5d95d98 )
ROM_LOAD( "c9_8000.bin", 0x8000, 0x2000, 0x49af8f22 )
ROM_LOAD( "c9_a000.bin", 0xa000, 0x2000, 0x7cf404a6 )
ROM_LOAD( "c9_c000.bin", 0xc000, 0x2000, 0x26a4d7df )
ROM_LOAD( "c9_e000.bin", 0xe000, 0x2000, 0x6e663bce )
ROM_REGION( 0x4000, REGION_GFX1 | REGIONFLAG_DISPOSE )
ROM_LOAD( "c9_gfx0.bin", 0x0000, 0x1000, 0xd01a8019 )
ROM_LOAD( "c9_gfx1.bin", 0x1000, 0x1000, 0x514ac009 )
ROM_LOAD( "c9_gfx2.bin", 0x2000, 0x1000, 0x930c1ade )
ROM_LOAD( "c9_gfx3.bin", 0x3000, 0x1000, 0x27e9b88d )
ROM_END
GAMEX( 1983, cloud9, 0, cloud9, cloud9, 0, ROT0, "Atari", "Cloud 9 (prototype)", GAME_NO_COCKTAIL )