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// license:BSD-3-Clause
// copyright-holders:hap, Sandro Ronco
// thanks-to:Berger
/******************************************************************************

Fidelity Phantom (model 6100)

Fidelity licensed the design of the Milton/Phantom motorized chessboard and released
their own version. It has a small LCD panel added, the rest looks nearly the same from
the outside. After Fidelity was taken over by H+G, it was rereleased in 1990 as the
Mephisto Phantom. This is assumed to be identical.

Hardware notes:
- PCB label 510.1128A01
- R65C02P4, XTAL marked 4.915200
- 2*32KB ROM 27C256-15, 8KB RAM MS6264L-10
- LCD driver, display panel for digits
- magnetized x/y DC motors under chessboard, chesspieces have magnet underneath
- piezo speaker, LEDs, 8*8 chessboard buttons

Chesster Phantom is on the same base hardware, and adds the Chesster voice to it,
using the same ROM as the original Chesster. Model 6124 extra hardware is on a
daughterboard, the housing is the same as model 6100, except for button labels.
Model 6126 has a dedicated PCB, this version also has a motion sensor at the front
and 2 leds to mimick eyes, and the housing color theme is green instead of beige.

At boot-up, the computer will do a self-test, the user can start playing after the
motor has moved to the upper-right corner. The computer will continue positioning
pieces though, so it may be a bit distracting. Or, just hold INSERT (on PC) for a
while to speed up MAME before starting a new game.

After the user captures a piece, select the captured piece from the MAME sensorboard
spawn block and place it anywhere on a free spot at the designated box at the
edge of the chessboard.

TODO:
- sensorboard undo buffer goes out of control, probably not worth solving this issue
- cphantom artwork should be green instead of beige

BTANB:
- cphantom: As the manual suggests, the computer's move should be displayed on the
  LCD while it's moving the piece just like in fphantom, but this is often too brief
  or not displayed at all. (This may seem like a minor bug in the game, but it
  actually makes it more difficult to write a MAME UCI plugin for this driver.)

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

#include "emu.h"

#include "cpu/m6502/r65c02.h"
#include "machine/sensorboard.h"
#include "machine/timer.h"
#include "sound/dac.h"
#include "video/pwm.h"

#include "speaker.h"

// internal artwork
#include "fidel_cphantom.lh" // clickable
#include "fidel_phantom.lh" // clickable


namespace {

// Phantom 6100 / shared

class phantom_state : public driver_device
{
public:
	phantom_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_rombank(*this, "rombank"),
		m_dac(*this, "dac"),
		m_board(*this, "board"),
		m_display(*this, "display"),
		m_inputs(*this, "IN.%u", 0),
		m_out_motor(*this, "motor.%u", 0U),
		m_out_motorx(*this, "motorx%u", 0U),
		m_out_motory(*this, "motory")
	{ }

	void phantom(machine_config &config);
	void init_phantom();

protected:
	virtual void machine_start() override;
	virtual void machine_reset() override;

	// devices/pointers
	required_device<cpu_device> m_maincpu;
	required_memory_bank m_rombank;
	optional_device<dac_bit_interface> m_dac;
	required_device<sensorboard_device> m_board;
	required_device<pwm_display_device> m_display;
	optional_ioport_array<2> m_inputs;
	output_finder<5> m_out_motor;
	output_finder<2> m_out_motorx;
	output_finder<> m_out_motory;

	// address maps
	virtual void main_map(address_map &map);

	// I/O handlers
	void init_motors();
	void check_rotation();
	TIMER_DEVICE_CALLBACK_MEMBER(motors_timer);
	void update_pieces_position(int state);

	void update_lcd(u8 select);
	virtual void control_w(offs_t offset, u8 data);
	void lcd_w(offs_t offset, u8 data);
	void motors_w(u8 data);
	virtual u8 input_r(offs_t offset);
	u8 motors_r(offs_t offset);
	u8 irq_ack_r();
	u8 hmotor_ff_clear_r();
	u8 vmotor_ff_clear_r();

	u8 m_mux = 0;
	u8 m_select = 0;
	u32 m_lcd_data = 0;

	u8 m_motors_ctrl;
	int m_hmotor_pos;
	int m_vmotor_pos;
	bool m_vmotor_sensor0_ff;
	bool m_vmotor_sensor1_ff;
	bool m_hmotor_sensor0_ff;
	bool m_hmotor_sensor1_ff;
	int m_piece;
	u8 m_pieces_map[0x40][0x40];
};

void phantom_state::machine_start()
{
	m_out_motor.resolve();
	m_out_motorx.resolve();
	m_out_motory.resolve();

	// register for savestates
	save_item(NAME(m_mux));
	save_item(NAME(m_select));
	save_item(NAME(m_lcd_data));
	save_item(NAME(m_motors_ctrl));
	save_item(NAME(m_hmotor_pos));
	save_item(NAME(m_vmotor_pos));
	save_item(NAME(m_vmotor_sensor0_ff));
	save_item(NAME(m_vmotor_sensor1_ff));
	save_item(NAME(m_hmotor_sensor0_ff));
	save_item(NAME(m_hmotor_sensor1_ff));
	save_item(NAME(m_piece));
	save_item(NAME(m_pieces_map));
}

void phantom_state::machine_reset()
{
	init_motors();
	m_rombank->set_entry(0);
}

void phantom_state::init_phantom()
{
	int numbanks = memregion("rombank")->bytes() / 0x4000;
	m_rombank->configure_entries(0, numbanks, memregion("rombank")->base(), 0x4000);
}

// Chesster Phantom

class chessterp_state : public phantom_state
{
public:
	chessterp_state(const machine_config &mconfig, device_type type, const char *tag) :
		phantom_state(mconfig, type, tag),
		m_eye_led(*this, "eye_led")
	{ }

	void cphantom(machine_config &config);

protected:
	virtual void machine_start() override;

private:
	output_finder<> m_eye_led;

	virtual void main_map(address_map &map) override;

	TIMER_DEVICE_CALLBACK_MEMBER(nmi_timer);
	virtual void control_w(offs_t offset, u8 data) override;
	virtual u8 input_r(offs_t offset) override;

	u8 m_select2 = 0;
};

void chessterp_state::machine_start()
{
	phantom_state::machine_start();

	m_eye_led.resolve();
	save_item(NAME(m_select2));
}

TIMER_DEVICE_CALLBACK_MEMBER(chessterp_state::nmi_timer)
{
	m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
}



/******************************************************************************
    Motor Sim
******************************************************************************/

void phantom_state::init_motors()
{
	m_motors_ctrl = 0;
	m_hmotor_pos = 0x23;
	m_vmotor_pos = 0x0e;
	m_vmotor_sensor0_ff = false;
	m_vmotor_sensor1_ff = false;
	m_hmotor_sensor0_ff = false;
	m_hmotor_sensor1_ff = false;
	m_piece = 0;
	memset(m_pieces_map, 0, sizeof(m_pieces_map));
}

void phantom_state::check_rotation()
{
	if (m_vmotor_pos != 0 && m_vmotor_pos != 0x88)
	{
		if (m_motors_ctrl & 0x03) m_vmotor_sensor0_ff = true;
		if (m_motors_ctrl & 0x02) m_vmotor_sensor1_ff = true;
	}
	if (m_hmotor_pos != 0 && m_hmotor_pos != 0xc0)
	{
		if (m_motors_ctrl & 0x0c) m_hmotor_sensor0_ff = true;
		if (m_motors_ctrl & 0x04) m_hmotor_sensor1_ff = true;
	}
}

TIMER_DEVICE_CALLBACK_MEMBER(phantom_state::motors_timer)
{
	check_rotation();

	// simulate 1 rotation gap per each tick
	if ((m_motors_ctrl & 0x01) && m_vmotor_pos > 0x00) m_vmotor_pos--;
	if ((m_motors_ctrl & 0x02) && m_vmotor_pos < 0x88) m_vmotor_pos++;
	if ((m_motors_ctrl & 0x04) && m_hmotor_pos > 0x00) m_hmotor_pos--;
	if ((m_motors_ctrl & 0x08) && m_hmotor_pos < 0xc0) m_hmotor_pos++;

	check_rotation();

	// output motor position
	int magnet = BIT(m_motors_ctrl, 4);
	m_out_motorx[magnet ^ 1] = 0xd0; // hide
	m_out_motorx[magnet] = m_hmotor_pos;
	m_out_motory = m_vmotor_pos;
}

void phantom_state::update_pieces_position(int state)
{
	// convert motors position into board coordinates
	int x = m_hmotor_pos / 16 - 2;
	int y = m_vmotor_pos / 16;

	if (x < 0)
		x += 12;

	// check if the magnet is in the center of a square
	bool valid_pos = ((m_hmotor_pos & 0x0f) > 0 && (m_hmotor_pos & 0x0f) <= 7) && ((m_vmotor_pos & 0x0f) > 8 && (m_vmotor_pos & 0x0f) <= 0xf);

	if (state)
	{
		if (valid_pos)
		{
			// check if piece was picked up by user
			int pos = (y << 4 & 0xf0) | (x & 0x0f);
			if (pos == m_board->get_handpos())
				m_piece = 0;
			else
				m_piece = m_board->read_piece(x, y);

			if (m_piece != 0)
				m_board->write_piece(x, y, 0);
		}
		else
			m_piece = m_pieces_map[m_vmotor_pos / 4][m_hmotor_pos / 4];

		m_pieces_map[m_vmotor_pos / 4][m_hmotor_pos / 4] = 0;
	}
	else if (m_piece != 0)
	{
		// check for pieces collisions
		if (valid_pos && m_board->read_piece(x, y) != 0)
		{
			valid_pos = false;
			logerror("Chesspiece collision at %C%d\n", x + 'A', y + 1);
		}

		if (valid_pos)
			m_board->write_piece(x, y, m_piece);

		m_pieces_map[m_vmotor_pos / 4][m_hmotor_pos / 4] = m_piece;
		m_piece = 0;
	}

	m_board->refresh();
}



/******************************************************************************
    I/O
******************************************************************************/

void phantom_state::update_lcd(u8 select)
{
	// update lcd at any edge
	if ((select ^ m_select) & 0x80)
	{
		u8 mask = (m_select & 0x80) ? 0xff : 0;
		for (int i = 0; i < 4; i++)
			m_display->write_row(i+1, (m_lcd_data >> (8*i) & 0xff) ^ mask);
	}
}

void phantom_state::control_w(offs_t offset, u8 data)
{
	u8 lcd_prev = m_select;

	// a0-a2,d1: 74259
	u8 mask = 1 << offset;
	m_select = (m_select & ~mask) | ((data & 0x02) ? mask : 0);

	// 74259 Q0-Q3: 7442 a0-a3
	// 7442 0-8: led data, input mux
	// 74259 Q4: led select
	m_mux = m_select & 0xf;
	m_display->matrix_partial(0, 1, BIT(~m_select, 4), 1 << m_mux);

	// 74259 Q6: bookrom bank
	m_rombank->set_entry(BIT(m_select, 6));

	// 74259 Q7: lcd polarity
	update_lcd(lcd_prev);
}

void chessterp_state::control_w(offs_t offset, u8 data)
{
	// chesster version has two 74259, more I/O
	u8 lcd_prev = m_select;
	u8 nmi_prev = m_select2;

	// a0-a2,d0,d1: 2*74259
	u8 mask = 1 << offset;
	m_select = (m_select & ~mask) | ((data & 1) ? mask : 0);
	m_select2 = (m_select2 & ~mask) | ((data & 2) ? mask : 0);

	// 74259(both) Q0,Q1: 7442 a0-a3
	// 7442 0-8: led data, input mux
	// 74259(1) Q2: led select
	m_mux = BIT(m_select, 0) | BIT(m_select2, 0) << 1 | BIT(m_select, 1) << 2 | BIT(m_select2, 1) << 3;
	m_display->matrix_partial(0, 1, BIT(~m_select, 2), 1 << m_mux);

	// 74259(2) Q2: eye leds
	m_eye_led = BIT(~m_select2, 2);

	// 74259(2) Q3 rising edge: nmi clear
	if (~nmi_prev & m_select2 & 8)
		m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);

	// 74259(1) Q4,Q5, 74259(2) Q4: speechrom bank
	m_rombank->set_entry(BIT(m_select, 4) | (BIT(m_select2, 4) << 1) | (BIT(m_select, 5) << 2));

	// 74259(1) Q7: lcd polarity
	update_lcd(lcd_prev);
}

void phantom_state::motors_w(u8 data)
{
	// d0: vertical motor down
	// d1: vertical motor up
	// d2: horizontal motor left
	// d3: horizontal motor right
	// d4: electromagnet
	for (int i = 0; i < 5; i++)
		m_out_motor[i] = BIT(data, i);

	if ((m_motors_ctrl ^ data) & 0x10)
		update_pieces_position(BIT(data, 4));

	m_motors_ctrl = data;

	// d5: speaker (not for chesster version, though it still writes to it)
	if (m_dac != nullptr)
		m_dac->write(BIT(data, 5));
}

void phantom_state::lcd_w(offs_t offset, u8 data)
{
	// a0-a2,d0,d2,d4,d6: 4*74259 to lcd digit segments
	u32 mask = bitswap<8>(1 << offset,3,7,6,0,1,2,4,5);
	for (int i = 0; i < 4; i++)
	{
		m_lcd_data = (m_lcd_data & ~mask) | (BIT(data, i * 2) ? mask : 0);
		mask <<= 8;
	}
}

u8 phantom_state::input_r(offs_t offset)
{
	u8 data = 0xff;

	// buttons
	if (m_mux == 8)
	{
		if (BIT(m_inputs[0]->read(), offset * 2 + 1)) data &= ~0x40;
		if (BIT(m_inputs[0]->read(), offset * 2 + 0)) data &= ~0x80;
	}

	// chessboard sensors
	else if (offset < 4)
	{
		if (BIT(m_board->read_file(offset * 2 + 1), m_mux)) data &= ~0x40;
		if (BIT(m_board->read_file(offset * 2 + 0), m_mux)) data &= ~0x80;
	}

	// captured pieces
	else
	{
		if (BIT(m_board->read_file( 8 + (offset & 1)), m_mux)) data &= ~0x40; // black
		if (BIT(m_board->read_file(11 - (offset & 1)), m_mux)) data &= ~0x80; // white
	}

	return data;
}

u8 chessterp_state::input_r(offs_t offset)
{
	u8 data = phantom_state::input_r(offset) & 0xfe;

	// d0: motion sensor (simulated here with an arbitrary timer)
	int motion = ((machine().time().as_ticks(50) & 0xff) > 0) ? 1 : 0;
	return data | motion | (m_inputs[1]->read() & 1);
}

u8 phantom_state::motors_r(offs_t offset)
{
	u8 data = 0xff;

	// optical rotation sensors
	switch (offset)
	{
	case 0:
		if (!m_vmotor_sensor1_ff) data &= ~0x40;
		if (!m_hmotor_sensor1_ff) data &= ~0x80;
		break;
	case 1:
		if (!m_vmotor_sensor0_ff) data &= ~0x40;
		if (!m_hmotor_sensor0_ff) data &= ~0x80;
		break;
	}

	return data;
}

u8 phantom_state::irq_ack_r()
{
	if (!machine().side_effects_disabled())
		m_maincpu->set_input_line(R65C02_IRQ_LINE, CLEAR_LINE);

	return 0;
}

u8 phantom_state::hmotor_ff_clear_r()
{
	if (!machine().side_effects_disabled())
		m_hmotor_sensor1_ff = m_hmotor_sensor0_ff = false;

	return 0;
}

u8 phantom_state::vmotor_ff_clear_r()
{
	if (!machine().side_effects_disabled())
		m_vmotor_sensor1_ff = m_vmotor_sensor0_ff = false;

	return 0;
}



/******************************************************************************
    Address Maps
******************************************************************************/

void phantom_state::main_map(address_map &map)
{
	map(0x0000, 0x1fff).ram();
	map(0x2000, 0x2007).mirror(0x00f8).w(FUNC(phantom_state::control_w));
	map(0x2100, 0x2107).mirror(0x00f8).w(FUNC(phantom_state::lcd_w)).nopr();
	map(0x2200, 0x2200).mirror(0x00ff).w(FUNC(phantom_state::motors_w));
	map(0x2400, 0x2405).mirror(0x00f8).r(FUNC(phantom_state::input_r));
	map(0x2406, 0x2407).mirror(0x00f8).r(FUNC(phantom_state::motors_r));
	map(0x2500, 0x2500).mirror(0x00ff).r(FUNC(phantom_state::hmotor_ff_clear_r));
	map(0x2600, 0x2600).mirror(0x00ff).r(FUNC(phantom_state::vmotor_ff_clear_r));
	map(0x2700, 0x2700).mirror(0x00ff).r(FUNC(phantom_state::irq_ack_r));
	map(0x4000, 0x7fff).bankr("rombank");
	map(0x8000, 0xffff).rom();
}

void chessterp_state::main_map(address_map &map)
{
	phantom_state::main_map(map);
	map(0x2300, 0x2300).mirror(0x00ff).w("speech", FUNC(dac_byte_interface::data_w));
}



/******************************************************************************
    Input Ports
******************************************************************************/

static INPUT_PORTS_START( phantom )
	PORT_START("IN.0")
	PORT_BIT(0x001, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_V) PORT_NAME("Verify / Problem")
	PORT_BIT(0x002, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_O) PORT_NAME("Option / Time")
	PORT_BIT(0x004, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_L) PORT_NAME("Level / New")
	PORT_BIT(0x008, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Take Back / Replay")
	PORT_BIT(0x010, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_H) PORT_NAME("Hint / Info")
	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_M) PORT_NAME("Move / Alternate")
	PORT_BIT(0x040, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_A) PORT_NAME("Auto / Stop")
	PORT_BIT(0x080, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_C) PORT_NAME("Clear")
	PORT_BIT(0x100, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_S) PORT_NAME("Shift")
	PORT_BIT(0x200, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x400, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x800, IP_ACTIVE_HIGH, IPT_UNUSED)
INPUT_PORTS_END

static INPUT_PORTS_START( cphantom )
	PORT_INCLUDE( phantom )

	PORT_MODIFY("IN.0")
	PORT_BIT(0x002, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_O) PORT_NAME("Option / Replay")
	PORT_BIT(0x008, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_I) PORT_NAME("Info / Auto")
	PORT_BIT(0x010, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Take Back / Repeat")
	PORT_BIT(0x020, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_H) PORT_NAME("Hint / Yes")
	PORT_BIT(0x040, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_M) PORT_NAME("Move / No/Stop")

	PORT_START("IN.1") // motion sensor is inverted here, eg. hold down key to pretend noone's there
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_F1) PORT_NAME("Motion Sensor")
INPUT_PORTS_END



/******************************************************************************
    Machine Configs
******************************************************************************/

void phantom_state::phantom(machine_config &config)
{
	// basic machine hardware
	R65C02(config, m_maincpu, 4.9152_MHz_XTAL); // R65C02P4 or RP65C02G
	m_maincpu->set_addrmap(AS_PROGRAM, &phantom_state::main_map);

	const attotime irq_period = attotime::from_hz(4.9152_MHz_XTAL / 0x2000); // 4060, 600Hz
	m_maincpu->set_periodic_int(FUNC(phantom_state::irq0_line_assert), irq_period);

	TIMER(config, "motors_timer").configure_periodic(FUNC(phantom_state::motors_timer), irq_period * 9);

	SENSORBOARD(config, m_board).set_type(sensorboard_device::BUTTONS);
	m_board->set_size(12, 8);
	m_board->init_cb().set(m_board, FUNC(sensorboard_device::preset_chess));
	m_board->set_delay(attotime::from_msec(100));

	// video hardware
	PWM_DISPLAY(config, m_display).set_size(1+4, 9);
	m_display->set_segmask(0x1e, 0x7f);

	config.set_default_layout(layout_fidel_phantom);

	// sound hardware
	SPEAKER(config, "speaker").front_center();
	DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25);
}

void chessterp_state::cphantom(machine_config &config)
{
	phantom(config);

	// basic machine hardware
	const attotime nmi_period = attotime::from_hz(4.9152_MHz_XTAL / 0x200); // 4060, 9.6kHz
	timer_device &nmi_clock(TIMER(config, "nmi_clock"));
	nmi_clock.configure_periodic(FUNC(chessterp_state::nmi_timer), nmi_period);
	nmi_clock.set_start_delay(nmi_period / 2); // interleaved with irq_period

	config.set_default_layout(layout_fidel_cphantom);

	// sound hardware
	config.device_remove("dac");
	DAC_8BIT_R2R(config, "speech").add_route(ALL_OUTPUTS, "speaker", 0.5);
}



/******************************************************************************
    ROM Definitions
******************************************************************************/

ROM_START( fphantom ) // model 6100, PCB label 510.1128A01
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD("u_3c_yellow.u3", 0x8000, 0x8000, CRC(fb7c38ae) SHA1(a1aa7637705052cb4eec92644dc79aee7ba4d77c) ) // 27C256

	ROM_REGION( 0x8000, "rombank", 0 )
	ROM_LOAD("u_4_white.u4",  0x0000, 0x8000, CRC(e4181ba2) SHA1(1f77d1867c6f566be98645fc252a01108f412c96) ) // 27C256
ROM_END


ROM_START( cphantom ) // model 6126, PCB label 510.1128D01
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD("pv.u3", 0x8000, 0x8000, CRC(450a9ab5) SHA1(8392c76cf18cd6f8b17c8b12fac40c5cea874941) ) // 27C256

	ROM_REGION( 0x20000, "rombank", 0 )
	ROM_LOAD("101-1091b02.u4", 0x0000, 0x20000, CRC(fa370e88) SHA1(a937c8f1ec295cf9539d12466993974e40771493) ) // AMI, 27C010 or equivalent
ROM_END

} // anonymous namespace



/******************************************************************************
    Drivers
******************************************************************************/

//    YEAR  NAME       PARENT CMP MACHINE   INPUT     STATE            INIT          COMPANY, FULLNAME, FLAGS
CONS( 1988, fphantom,  0,     0,  phantom,  phantom,  phantom_state,   init_phantom, "Fidelity Electronics", "Phantom (Fidelity)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS | MACHINE_MECHANICAL )

CONS( 1991, cphantom,  0,     0,  cphantom, cphantom, chessterp_state, init_phantom, "Fidelity Electronics", "Chesster Phantom (model 6126)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS | MACHINE_MECHANICAL )