/***************************************************************************
Atari Clay Shoot hardware
driver by Zsolt Vasvari
Games supported:
* Clay Shoot
Known issues:
* none at this time
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/8255ppi.h"
class clayshoo_state : public driver_device
{
public:
clayshoo_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) { }
/* memory pointers */
UINT8 * m_videoram;
size_t m_videoram_size;
/* misc */
emu_timer *m_analog_timer_1, *m_analog_timer_2;
UINT8 m_input_port_select;
UINT8 m_analog_port_val;
};
/*************************************
*
* Digital control handling functions
*
*************************************/
static WRITE8_DEVICE_HANDLER( input_port_select_w )
{
clayshoo_state *state = device->machine().driver_data<clayshoo_state>();
state->m_input_port_select = data;
}
static UINT8 difficulty_input_port_r( running_machine &machine, int bit )
{
UINT8 ret = 0;
/* read fake port and remap the buttons to 2 bits */
UINT8 raw = input_port_read(machine, "FAKE");
if (raw & (1 << (bit + 1)))
ret = 0x03; /* expert */
else if (raw & (1 << (bit + 2)))
ret = 0x01; /* pro */
else
ret = 0x00; /* amateur otherwise */
return ret;
}
static READ8_DEVICE_HANDLER( input_port_r )
{
clayshoo_state *state = device->machine().driver_data<clayshoo_state>();
UINT8 ret = 0;
switch (state->m_input_port_select)
{
case 0x01: ret = input_port_read(device->machine(), "IN0"); break;
case 0x02: ret = input_port_read(device->machine(), "IN1"); break;
case 0x04: ret = (input_port_read(device->machine(), "IN2") & 0xf0) | difficulty_input_port_r(device->machine(), 0) |
(difficulty_input_port_r(device->machine(), 3) << 2); break;
case 0x08: ret = input_port_read(device->machine(), "IN3"); break;
case 0x10:
case 0x20: break; /* these two are not really used */
default: logerror("Unexpected port read: %02X\n", state->m_input_port_select);
}
return ret;
}
/*************************************
*
* Analog control handling functions
*
*************************************/
static TIMER_CALLBACK( reset_analog_bit )
{
clayshoo_state *state = machine.driver_data<clayshoo_state>();
state->m_analog_port_val &= ~param;
}
static attotime compute_duration( device_t *device, int analog_pos )
{
/* the 58 comes from the length of the loop used to
read the analog position */
return downcast<cpu_device *>(device)->cycles_to_attotime(58 * analog_pos);
}
static WRITE8_HANDLER( analog_reset_w )
{
clayshoo_state *state = space->machine().driver_data<clayshoo_state>();
/* reset the analog value, and start the two times that will fire
off in a short period proportional to the position of the
analog control and set the appropriate bit. */
state->m_analog_port_val = 0xff;
state->m_analog_timer_1->adjust(compute_duration(&space->device(), input_port_read(space->machine(), "AN1")), 0x02);
state->m_analog_timer_2->adjust(compute_duration(&space->device(), input_port_read(space->machine(), "AN2")), 0x01);
}
static READ8_HANDLER( analog_r )
{
clayshoo_state *state = space->machine().driver_data<clayshoo_state>();
return state->m_analog_port_val;
}
static void create_analog_timers( running_machine &machine )
{
clayshoo_state *state = machine.driver_data<clayshoo_state>();
state->m_analog_timer_1 = machine.scheduler().timer_alloc(FUNC(reset_analog_bit));
state->m_analog_timer_2 = machine.scheduler().timer_alloc(FUNC(reset_analog_bit));
}
/*************************************
*
* Machine setup
*
*************************************/
static const ppi8255_interface ppi8255_intf[2] =
{
{
DEVCB_NULL, /* Port A read */
DEVCB_NULL, /* Port B read */
DEVCB_NULL, /* Port C read */
DEVCB_NULL, /* Port A write */
DEVCB_NULL, /* Port B write */
DEVCB_NULL /* Port C write */
},
{
DEVCB_NULL, /* Port A read */
DEVCB_HANDLER(input_port_r),/* Port B read */
DEVCB_NULL, /* Port C read */
DEVCB_HANDLER(input_port_select_w), /* Port A write */
DEVCB_NULL, /* Port B write */
DEVCB_NULL /* sound effects, Port C write */
}
};
static MACHINE_START( clayshoo )
{
clayshoo_state *state = machine.driver_data<clayshoo_state>();
create_analog_timers(machine);
/* register for state saving */
state->save_item(NAME(state->m_input_port_select));
state->save_item(NAME(state->m_analog_port_val));
}
/*************************************
*
* Video hardware
*
*************************************/
static SCREEN_UPDATE( clayshoo )
{
clayshoo_state *state = screen->machine().driver_data<clayshoo_state>();
offs_t offs;
for (offs = 0; offs < state->m_videoram_size; offs++)
{
int i;
UINT8 x = offs << 3;
UINT8 y = ~(offs >> 5);
UINT8 data = state->m_videoram[offs];
for (i = 0; i < 8; i++)
{
pen_t pen = (data & 0x80) ? RGB_WHITE : RGB_BLACK;
*BITMAP_ADDR32(bitmap, y, x) = pen;
data = data << 1;
x = x + 1;
}
}
return 0;
}
/*************************************
*
* Memory handlers
*
*************************************/
static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8 )
AM_RANGE(0x0000, 0x1fff) AM_ROM
AM_RANGE(0x2000, 0x23ff) AM_RAM
AM_RANGE(0x4000, 0x47ff) AM_ROM
AM_RANGE(0x8000, 0x97ff) AM_RAM AM_BASE_SIZE_MEMBER(clayshoo_state, m_videoram, m_videoram_size) /* 6k of video ram according to readme */
AM_RANGE(0x9800, 0xa800) AM_WRITENOP /* not really mapped, but cleared */
AM_RANGE(0xc800, 0xc800) AM_READWRITE(analog_r, analog_reset_w)
ADDRESS_MAP_END
/*************************************
*
* Port handlers
*
*************************************/
static ADDRESS_MAP_START( main_io_map, AS_IO, 8 )
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x00, 0x00) AM_WRITE(watchdog_reset_w)
AM_RANGE(0x20, 0x23) AM_DEVREADWRITE("ppi8255_0", ppi8255_r, ppi8255_w)
AM_RANGE(0x30, 0x33) AM_DEVREADWRITE("ppi8255_1", ppi8255_r, ppi8255_w)
ADDRESS_MAP_END
/*************************************
*
* Port definitions
*
*************************************/
static INPUT_PORTS_START( clayshoo )
PORT_START("IN0")
PORT_DIPNAME( 0x03, 0x00, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 2C_3C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x03, DEF_STR( Free_Play ) )
PORT_BIT( 0x3c, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* doesn't appear to be used */
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Demo_Sounds ) ) /* not 100% positive */
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x40, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) /* used */
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x80, DEF_STR( On ) )
PORT_START("IN1")
PORT_DIPNAME( 0x07, 0x01, "Time/Bonus 1P-2P" )
PORT_DIPSETTING( 0x00, "60/6k-90/6k" )
PORT_DIPSETTING( 0x01, "60/6k-120/8k" )
PORT_DIPSETTING( 0x02, "90/9.5k-150/9.5k" )
PORT_DIPSETTING( 0x03, "90/9.5k-190/11k" )
PORT_DIPSETTING( 0x04, "60/8k-90/8k" )
PORT_DIPSETTING( 0x05, "60/8k-120/10k" )
PORT_DIPSETTING( 0x06, "90/11.5k-150/11.5k" )
PORT_DIPSETTING( 0x07, "90/11.5k-190/13k" )
PORT_BIT( 0xf8, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* doesn't appear to be used */
PORT_START("IN2")
PORT_BIT( 0x03, IP_ACTIVE_LOW, IPT_SPECIAL ) /* amateur/expert/pro Player 2 */
PORT_BIT( 0x0c, IP_ACTIVE_LOW, IPT_SPECIAL ) /* amateur/expert/pro Player 1 */
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START2 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_START("IN3")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0xfe, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_START("AN1") /* IN4 - Fake analog control. Visible in $c800 bit 1 */
PORT_BIT( 0x0f, 0x08, IPT_AD_STICK_Y ) PORT_MINMAX(0,0x0f) PORT_SENSITIVITY(10) PORT_KEYDELTA(10) PORT_REVERSE PORT_PLAYER(1)
PORT_BIT( 0xf0, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_START("AN2") /* IN5 - Fake analog control. Visible in $c800 bit 0 */
PORT_BIT( 0x0f, 0x08, IPT_AD_STICK_Y ) PORT_MINMAX(0,0x0f) PORT_SENSITIVITY(10) PORT_KEYDELTA(10) PORT_REVERSE PORT_PLAYER(2)
PORT_BIT( 0xf0, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_START("FAKE") /* IN6 - Fake. Visible in IN2 bits 0-1 and 2-3 */
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_TOGGLE PORT_PLAYER(2) PORT_NAME("P2 Amateur Difficulty")
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON3 ) PORT_TOGGLE PORT_PLAYER(2) PORT_NAME("P2 Expert Difficulty")
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_TOGGLE PORT_PLAYER(2) PORT_NAME("P2 Pro Difficulty")
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_TOGGLE PORT_PLAYER(1) PORT_NAME("P1 Amateur Difficulty")
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON3 ) PORT_TOGGLE PORT_PLAYER(1) PORT_NAME("P1 Expert Difficulty")
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_TOGGLE PORT_PLAYER(1) PORT_NAME("P2 Pro Difficulty")
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END
/*************************************
*
* Machine driver
*
*************************************/
static MACHINE_RESET( clayshoo )
{
clayshoo_state *state = machine.driver_data<clayshoo_state>();
state->m_input_port_select = 0;
state->m_analog_port_val = 0;
}
static MACHINE_CONFIG_START( clayshoo, clayshoo_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z80,5068000/4) /* 5.068/4 Mhz (divider is a guess) */
MCFG_CPU_PROGRAM_MAP(main_map)
MCFG_CPU_IO_MAP(main_io_map)
MCFG_CPU_VBLANK_INT("screen", irq0_line_hold)
MCFG_MACHINE_START(clayshoo)
MCFG_MACHINE_RESET(clayshoo)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
MCFG_SCREEN_SIZE(256, 256)
MCFG_SCREEN_VISIBLE_AREA(0, 255, 64, 255)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
MCFG_SCREEN_UPDATE(clayshoo)
MCFG_PPI8255_ADD( "ppi8255_0", ppi8255_intf[0] )
MCFG_PPI8255_ADD( "ppi8255_1", ppi8255_intf[1] )
MACHINE_CONFIG_END
/*************************************
*
* ROM definitions
*
*************************************/
ROM_START( clayshoo )
ROM_REGION( 0x10000, "maincpu", 0 )
ROM_LOAD( "0", 0x0000, 0x0800, CRC(9df9d9e3) SHA1(8ce71a6faf5df9c8c3dbb92a443b62c0f376491c) )
ROM_LOAD( "1", 0x0800, 0x0800, CRC(5134a631) SHA1(f0764a5161934564fd0416be26087cf812e0c422) )
ROM_LOAD( "2", 0x1000, 0x0800, CRC(5b5a67f6) SHA1(c97b4d44e6dc5dd0c42e04ffceed8934975fe769) )
ROM_LOAD( "3", 0x1800, 0x0800, CRC(7eda8e44) SHA1(2974f8b06653aee2ffd96ff402707acfc059bc91) )
ROM_LOAD( "4", 0x4000, 0x0800, CRC(3da16196) SHA1(eb0c0cf0c8fc3db05ac0c469fb20fe92ae6f27ce) )
ROM_END
/*************************************
*
* Game drivers
*
*************************************/
GAME( 1979, clayshoo, 0, clayshoo, clayshoo, 0, ROT0, "Allied Leisure", "Clay Shoot", GAME_NO_SOUND | GAME_SUPPORTS_SAVE )