// license:BSD-3-Clause
// copyright-holders:Zsolt Vasvari
/***************************************************************************

    Allied Leisure Clay Shoot hardware

    driver by Zsolt Vasvari

    Games supported:
        * Clay Shoot

    Known issues:
        * no sound
        * cocktail mode, dipswitch or alternate romset?
          (cocktail set has a color overlay, upright set has a backdrop)

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/i8255.h"
#include "machine/watchdog.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),
		m_videoram(*this, "videoram"),
		m_maincpu(*this, "maincpu") { }

	/* memory pointers */
	required_shared_ptr<UINT8> m_videoram;

	/* misc */
	emu_timer *m_analog_timer_1, *m_analog_timer_2;
	UINT8 m_input_port_select;
	UINT8 m_analog_port_val;
	DECLARE_WRITE8_MEMBER(analog_reset_w);
	DECLARE_READ8_MEMBER(analog_r);
	DECLARE_WRITE8_MEMBER(input_port_select_w);
	DECLARE_READ8_MEMBER(input_port_r);
	virtual void machine_start() override;
	virtual void machine_reset() override;
	UINT32 screen_update_clayshoo(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
	TIMER_CALLBACK_MEMBER(reset_analog_bit);
	UINT8 difficulty_input_port_r( int bit );
	void create_analog_timers(  );
	required_device<cpu_device> m_maincpu;
};


/*************************************
 *
 *  Digital control handling functions
 *
 *************************************/

WRITE8_MEMBER(clayshoo_state::input_port_select_w)
{
	m_input_port_select = data;
}


UINT8 clayshoo_state::difficulty_input_port_r( int bit )
{
	UINT8 ret = 0;

	/* read fake port and remap the buttons to 2 bits */
	UINT8   raw = ioport("FAKE")->read();

	if (raw & (1 << (bit + 1)))
		ret = 0x03;     /* expert */
	else if (raw & (1 << (bit + 2)))
		ret = 0x01;     /* pro */
	else
		ret = 0x00;     /* amateur otherwise */

	return ret;
}


READ8_MEMBER(clayshoo_state::input_port_r)
{
	UINT8 ret = 0;

	switch (m_input_port_select)
	{
	case 0x01:  ret = ioport("IN0")->read(); break;
	case 0x02:  ret = ioport("IN1")->read(); break;
	case 0x04:  ret = (ioport("IN2")->read() & 0xf0) | difficulty_input_port_r(0) |
						(difficulty_input_port_r(3) << 2); break;
	case 0x08:  ret = ioport("IN3")->read(); break;
	case 0x10:
	case 0x20:  break;  /* these two are not really used */
	default: logerror("Unexpected port read: %02X\n", m_input_port_select);
	}
	return ret;
}



/*************************************
 *
 *  Analog control handling functions
 *
 *************************************/

TIMER_CALLBACK_MEMBER(clayshoo_state::reset_analog_bit)
{
	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);
}


WRITE8_MEMBER(clayshoo_state::analog_reset_w)
{
	/* 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. */

	m_analog_port_val = 0xff;

	m_analog_timer_1->adjust(compute_duration(&space.device(), ioport("AN1")->read()), 0x02);
	m_analog_timer_2->adjust(compute_duration(&space.device(), ioport("AN2")->read()), 0x01);
}


READ8_MEMBER(clayshoo_state::analog_r)
{
	return m_analog_port_val;
}


void clayshoo_state::create_analog_timers(  )
{
	m_analog_timer_1 = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(clayshoo_state::reset_analog_bit),this));
	m_analog_timer_2 = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(clayshoo_state::reset_analog_bit),this));
}



/*************************************
 *
 *  Machine setup
 *
 *************************************/

void clayshoo_state::machine_start()
{
	create_analog_timers();

	/* register for state saving */
	save_item(NAME(m_input_port_select));
	save_item(NAME(m_analog_port_val));
}



/*************************************
 *
 *  Video hardware
 *
 *************************************/

UINT32 clayshoo_state::screen_update_clayshoo(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	offs_t offs;

	for (offs = 0; offs < m_videoram.bytes(); offs++)
	{
		int i;
		UINT8 x = offs << 3;
		UINT8 y = ~(offs >> 5);
		UINT8 data = m_videoram[offs];

		for (i = 0; i < 8; i++)
		{
			pen_t pen = (data & 0x80) ? rgb_t::white : rgb_t::black;
			bitmap.pix32(y, x) = pen;

			data = data << 1;
			x = x + 1;
		}
	}

	return 0;
}



/*************************************
 *
 *  Memory handlers
 *
 *************************************/

static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8, clayshoo_state )
	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_SHARE("videoram")    /* 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, clayshoo_state )
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x00, 0x00) AM_DEVWRITE("watchdog", watchdog_timer_device, reset_w)
	AM_RANGE(0x20, 0x23) AM_DEVREADWRITE("ppi8255_0", i8255_device, read, write)
	AM_RANGE(0x30, 0x33) AM_DEVREADWRITE("ppi8255_1", i8255_device, read, write)
//  AM_RANGE(0x40, 0x43) AM_NOP // 8253 for sound?
//  AM_RANGE(0x50, 0x50) AM_NOP // ?
//  AM_RANGE(0x60, 0x60) AM_NOP // ?
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
 *
 *************************************/

void clayshoo_state::machine_reset()
{
	m_input_port_select = 0;
	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_DRIVER("screen", clayshoo_state,  irq0_line_hold)

	MCFG_WATCHDOG_ADD("watchdog")

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	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_DRIVER(clayshoo_state, screen_update_clayshoo)

	MCFG_DEVICE_ADD("ppi8255_0", I8255A, 0)

	MCFG_DEVICE_ADD("ppi8255_1", I8255A, 0)
	MCFG_I8255_OUT_PORTA_CB(WRITE8(clayshoo_state, input_port_select_w))
	MCFG_I8255_IN_PORTB_CB(READ8(clayshoo_state, input_port_r))
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, driver_device, 0, ROT0, "Allied Leisure", "Clay Shoot", MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )
