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AmigActive 10
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sharkatt.c
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C/C++ Source or Header
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2000-04-23
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7KB
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237 lines
/***************************************************************************
Shark Attack
driver by Victor Trucco, Mike Balfour
TODO:
- Finish 8255 emulation and separate into new source file.
- Add support for audio cassette for diver sounds (port C of 8255)
- Verify that nothing needs to be done for the TMS9927 VTAC.
- Locate the "cocktail" set of ROMs.
- Figure out what the write to port 0 is used for.
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
extern void sharkatt_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);
WRITE_HANDLER( sharkatt_videoram_w );
WRITE_HANDLER( sharkatt_color_map_w );
WRITE_HANDLER( sharkatt_color_plane_w );
WRITE_HANDLER( sharkatt_vtcsel_w );
static int PA_8255 = 0;
static int PB_8255 = 0;
static int PC_8255 = 0;
static READ_HANDLER( sharkatt_8255_r )
{
switch (offset & 0x03)
{
case 1:
/* SWITCH BANK 1 - B6 */
if (PA_8255 & 0x01)
return input_port_0_r(offset);
/* SWITCH BANK 0 - B5 */
if (PA_8255 & 0x02)
return input_port_1_r(offset);
/* PFPCONN - B8 */
if (PA_8255 & 0x04)
return input_port_2_r(offset);
/* PFDCONN - B7 */
if (PA_8255 & 0x08)
return input_port_3_r(offset);
logerror("8255: read from port B, PA = %X\n",PA_8255);
break;
default:
logerror("8255: read from port<>B, offset %d\n",offset);
break;
}
return 0;
}
static WRITE_HANDLER( sharkatt_8255_w )
{
switch (offset & 0x03)
{
case 0: PA_8255 = data; break;
case 1: PB_8255 = data; break;
case 2: PC_8255 = data; break;
case 3: logerror("8255 Control = %02X\n",data);
}
}
static struct MemoryReadAddress readmem[] =
{
{ 0x0000, 0x7fff, MRA_ROM }, /* ROMSEL - ROMs at 6800-7fff are unpopulated */
{ 0x8000, 0x9fff, MRA_RAM }, /* RAMSEL */
{ 0xc000, 0xdfff, MRA_RAM },
{ -1 } /* end of table */
};
static struct MemoryWriteAddress writemem[] =
{
{ 0x0000, 0x7fff, MWA_ROM }, /* ROMSEL - ROMs at 6800-7fff are unpopulated */
{ 0x8000, 0x9fff, MWA_RAM }, /* RAMSEL */
{ 0xc000, 0xdfff, sharkatt_videoram_w, &videoram, &videoram_size },
{ -1 } /* end of table */
};
static struct IOReadPort readport[] =
{
{ 0x30, 0x3f, sharkatt_8255_r },
{ 0x41, 0x41, AY8910_read_port_0_r },
{ 0x43, 0x43, AY8910_read_port_1_r },
{ -1 } /* end of table */
};
/* TODO: figure out what this does!!! */
static WRITE_HANDLER( fake_w )
{
}
static struct IOWritePort writeport[] =
{
{ 0x00, 0x00, fake_w },
{ 0x30, 0x3f, sharkatt_8255_w },
{ 0x40, 0x40, AY8910_control_port_0_w },
{ 0x41, 0x41, AY8910_write_port_0_w },
{ 0x42, 0x42, AY8910_control_port_1_w },
{ 0x43, 0x43, AY8910_write_port_1_w },
{ 0x50, 0x5f, sharkatt_color_plane_w },
{ 0x60, 0x6f, sharkatt_vtcsel_w },
{ 0x70, 0x7f, sharkatt_color_map_w },
{ -1 } /* end of table */
};
INPUT_PORTS_START( sharkatt )
PORT_START /* IN0 */
PORT_DIPNAME( 0x01, 0x01, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 1C_1C ) )
PORT_BIT( 0xFE, IP_ACTIVE_HIGH, IPT_UNKNOWN ) // Unlabelled DIPs
PORT_START /* IN1 */
PORT_DIPNAME( 0x03, 0x03, DEF_STR( Lives ) )
PORT_DIPSETTING( 0x00, "3" )
PORT_DIPSETTING( 0x01, "4" )
PORT_DIPSETTING( 0x02, "5" )
PORT_DIPSETTING( 0x03, "5" )
PORT_BIT( 0x7C, IP_ACTIVE_HIGH, IPT_UNKNOWN ) // Unlabelled DIPs
PORT_BITX(0x80, IP_ACTIVE_HIGH, IPT_SERVICE | IPF_TOGGLE, "Self Test", KEYCODE_F2, IP_JOY_NONE )
PORT_START /* IN2 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | 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_START1 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START2 )
PORT_BITX(0x40, IP_ACTIVE_LOW, IPT_BUTTON1, "Munch", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
PORT_BITX(0x80, IP_ACTIVE_LOW, IPT_BUTTON2, "Thrust", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
PORT_START /* IN3 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY | IPF_COCKTAIL)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY | IPF_COCKTAIL)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY | IPF_COCKTAIL)
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_COCKTAIL)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_TILT )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BITX(0x40, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_COCKTAIL, "Munch", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
PORT_BITX(0x80, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_COCKTAIL, "Thrust", IP_KEY_DEFAULT, IP_JOY_DEFAULT )
INPUT_PORTS_END
static struct AY8910interface ay8910_interface =
{
2, /* 2 chips */
4000000/4, /* Z80 Clock / 4 */
{ 25, 25 },
{ 0 },
{ 0 },
{ 0 },
{ 0 }
};
static int sharkatt_interrupt(void)
{
/* SLAM switch causes an NMI if it's pressed */
if ((input_port_3_r(0) & 0x10) == 0)
return nmi_interrupt();
return interrupt();
}
static struct MachineDriver machine_driver_sharkatt =
{
/* basic machine hardware */
{
{
CPU_Z80,
4000000, /* 4 Mhz? */
readmem,writemem,readport,writeport,
sharkatt_interrupt,1
}
},
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 },
0, /* no gfxdecodeinfo - bitmapped display */
16, 16,
0,
VIDEO_TYPE_RASTER | VIDEO_SUPPORTS_DIRTY | VIDEO_MODIFIES_PALETTE,
0,
generic_vh_start,
generic_vh_stop,
sharkatt_vh_screenrefresh,
/* sound hardware */
0,0,0,0,
{
{
SOUND_AY8910,
&ay8910_interface
}
}
};
/***************************************************************************
Game driver(s)
***************************************************************************/
ROM_START( sharkatt )
ROM_REGION( 0x10000, REGION_CPU1 ) /* 64k for code */
ROM_LOAD( "sharkatt.0", 0x0000, 0x0800, 0xc71505e9 )
ROM_LOAD( "sharkatt.1", 0x0800, 0x0800, 0x3e3abf70 )
ROM_LOAD( "sharkatt.2", 0x1000, 0x0800, 0x96ded944 )
ROM_LOAD( "sharkatt.3", 0x1800, 0x0800, 0x007283ae )
ROM_LOAD( "sharkatt.4a", 0x2000, 0x0800, 0x5cb114a7 )
ROM_LOAD( "sharkatt.5", 0x2800, 0x0800, 0x1d88aaad )
ROM_LOAD( "sharkatt.6", 0x3000, 0x0800, 0xc164bad4 )
ROM_LOAD( "sharkatt.7", 0x3800, 0x0800, 0xd78c4b8b )
ROM_LOAD( "sharkatt.8", 0x4000, 0x0800, 0x5958476a )
ROM_LOAD( "sharkatt.9", 0x4800, 0x0800, 0x4915eb37 )
ROM_LOAD( "sharkatt.10", 0x5000, 0x0800, 0x9d07cb68 )
ROM_LOAD( "sharkatt.11", 0x5800, 0x0800, 0x21edc962 )
ROM_LOAD( "sharkatt.12a", 0x6000, 0x0800, 0x5dd8785a )
ROM_END
GAME( 1980, sharkatt, 0, sharkatt, sharkatt, 0, ORIENTATION_SWAP_XY, "Pacific Novelty", "Shark Attack" )