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

CXG Sphinx Dominator, chess computer.

Hardware notes:
- R65C02P4 @ 4MHz
- 32KB ROM, 8KB RAM battery-backed
- Sanyo LC7582, 2 LCD panels (each 4-digit)
- TTL, piezo, 8*8+8 LEDs, button sensors

Sphinx Galaxy is assumed to be on similar hardware.

The chess engine is by Frans Morsch, older versions (before 2.05) were buggy.
Hold Pawn + Knight buttons at boot for test mode, it will tell the version number.
This engine was also used in the newer Mephisto Modena.

TODO:
- artwork

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

#include "emu.h"
#include "cpu/m6502/r65c02.h"
#include "machine/nvram.h"
#include "machine/sensorboard.h"
#include "sound/dac.h"
#include "sound/volt_reg.h"
#include "video/pwm.h"
#include "video/lc7582.h"
#include "speaker.h"

// internal artwork
//#include "cxg_dominator.lh" // clickable


namespace {

class dominator_state : public driver_device
{
public:
	dominator_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_lcd(*this, "lcd"),
		m_display(*this, "display"),
		m_board(*this, "board"),
		m_dac(*this, "dac"),
		m_inputs(*this, "IN.%u", 0),
		m_digits(*this, "digit%u", 0U),
		m_dp(*this, "dp%u", 0U)
	{ }

	// machine drivers
	void dominator(machine_config &config);

protected:
	virtual void machine_start() override;

private:
	// devices/pointers
	required_device<cpu_device> m_maincpu;
	required_device<lc7582_device> m_lcd;
	required_device<pwm_display_device> m_display;
	required_device<sensorboard_device> m_board;
	required_device<dac_bit_interface> m_dac;
	required_ioport_array<2> m_inputs;
	output_finder<8> m_digits;
	output_finder<2> m_dp;

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

	// I/O handlers
	DECLARE_WRITE64_MEMBER(lcd_s_w);
	DECLARE_WRITE8_MEMBER(control_w);
	DECLARE_WRITE8_MEMBER(leds_w);
	DECLARE_READ8_MEMBER(input_r);
};

void dominator_state::machine_start()
{
	m_digits.resolve();
	m_dp.resolve();
}



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

// LCD

WRITE64_MEMBER(dominator_state::lcd_s_w)
{
	u8 d[4];

	// 1st digit: S1-S9, unused middle vertical segments
	// 2nd digit: S10-S18, unused bottom-right diagonal segment
	// 3rd digit: S21-S27
	// 4th digit: S28-S34
	d[0] = bitswap<9>(data >> 0 & 0x1ff, 2,7,5,4,3,1,0,8,6) & 0x7f;
	d[1] = bitswap<9>(data >> 9 & 0x1ff, 7,6,4,2,0,8,5,3,1) & 0x7f;
	d[2] = bitswap<7>(data >> 20 & 0x7f, 3,5,1,0,2,6,4);
	d[3] = bitswap<7>(data >> 27 & 0x7f, 4,2,0,6,5,3,1);

	for (int i = 0; i < 4; i++)
		m_digits[offset * 4 + i] = d[i];

	// colon: S17 (part of 2nd digit)
	m_dp[offset] = BIT(data, 16);
}


// TTL

WRITE8_MEMBER(dominator_state::control_w)
{
	// d0: LC7582 DATA
	// d1: LC7582 CLK
	// d2: LC7582 CE
	m_lcd->data_w(BIT(data, 0));
	m_lcd->clk_w(BIT(data, 1));
	m_lcd->ce_w(BIT(data, 2));

	// d3: speaker out
	m_dac->write(BIT(data, 3));
}

WRITE8_MEMBER(dominator_state::leds_w)
{
	// led data
	m_display->matrix(1 << offset, data);
}

READ8_MEMBER(dominator_state::input_r)
{
	u8 data = 0;

	// read chessboard sensors
	if (offset < 8)
		data = m_board->read_rank(offset);

	// read other buttons
	else if (offset < 10)
		data = m_inputs[offset - 8]->read();

	return ~data;
}



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

void dominator_state::main_map(address_map &map)
{
	map(0x0000, 0x1fff).ram().share("nvram");
	map(0x4000, 0x400f).rw(FUNC(dominator_state::input_r), FUNC(dominator_state::leds_w));
	map(0x4010, 0x4010).w(FUNC(dominator_state::control_w));
	//map(0x7f00, 0x7fff).nopr(); // mid-opcode dummy read
	map(0x8000, 0xffff).rom();
}



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

static INPUT_PORTS_START( dominator )
	PORT_START("IN.0")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_M) PORT_NAME("Move")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Take Back")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_NAME("Pawn")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_NAME("Knight")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_NAME("Bishop")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_NAME("Rook")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_NAME("Queen")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_NAME("King")

	PORT_START("IN.1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_U) PORT_NAME("Multi Move")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_L) PORT_NAME("Level")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_H) PORT_NAME("Hint")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("Replay")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_I) PORT_CODE(KEYCODE_BACKSPACE) PORT_CODE(KEYCODE_DEL) PORT_NAME("Library/Clear")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_S) PORT_CODE(KEYCODE_C) PORT_NAME("Color/Sound")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_NAME("Enter Position")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_N) PORT_NAME("New Game")
INPUT_PORTS_END



/******************************************************************************
    Machine Drivers
******************************************************************************/

void dominator_state::dominator(machine_config &config)
{
	/* basic machine hardware */
	R65C02(config, m_maincpu, 4_MHz_XTAL);
	m_maincpu->set_addrmap(AS_PROGRAM, &dominator_state::main_map);

	const attotime irq_period = attotime::from_hz(4_MHz_XTAL / 0x2000); // from 4020
	m_maincpu->set_periodic_int(FUNC(dominator_state::nmi_line_pulse), irq_period);

	NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0);

	SENSORBOARD(config, m_board).set_type(sensorboard_device::BUTTONS);
	m_board->init_cb().set(m_board, FUNC(sensorboard_device::preset_chess));
	m_board->set_delay(attotime::from_msec(150));

	/* video hardware */
	LC7582(config, m_lcd, 0);
	m_lcd->write_segs().set(FUNC(dominator_state::lcd_s_w));

	PWM_DISPLAY(config, m_display).set_size(8+1, 8);
	//config.set_default_layout(layout_cxg_dominator);

	/* sound hardware */
	SPEAKER(config, "speaker").front_center();
	DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25);
	VOLTAGE_REGULATOR(config, "vref").add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT);
}



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

ROM_START( sdtor )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD("22p_2.05", 0x8000, 0x8000, CRC(9707119c) SHA1(d7cde835a37bd5d9ff349a871c890ea4cd9b2c26) )
ROM_END

} // anonymous namespace



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

/*    YEAR  NAME   PARENT  COMPAT  MACHINE    INPUT      CLASS            INIT        COMPANY, FULLNAME, FLAGS */
CONS( 1989, sdtor, 0,      0,      dominator, dominator, dominator_state, empty_init, "CXG", "Sphinx Dominator (v2.05)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_NOT_WORKING )