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// license:BSD-3-Clause
// copyright-holders:hap
// thanks-to:bataais
/******************************************************************************
Fidelity Eldorado Chess Challenger (model 6119)
Hardware notes:
- PCB label CXG262-600-001, CXG262-600-101
- TMP80C49AP6-6744 MCU, 2KB internal ROM, 6MHz XTAL
- buzzer, 16 leds, 8*8 chessboard buttons
The chess engine is by Ron Nelson. The hardware was made by CXG for Fidelity,
as seen on the PCB and also confirmed by Ron Nelson.
******************************************************************************/
#include "emu.h"
#include "cpu/mcs48/mcs48.h"
#include "machine/sensorboard.h"
#include "sound/dac.h"
#include "video/pwm.h"
#include "speaker.h"
// internal artwork
#include "fidel_eldorado.lh" // clickable
namespace {
class eldorado_state : public driver_device
{
public:
eldorado_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_display(*this, "display"),
m_board(*this, "board"),
m_dac(*this, "dac"),
m_inputs(*this, "IN.0")
{ }
// machine configs
void eldorado(machine_config &config);
protected:
virtual void machine_start() override;
private:
// devices/pointers
required_device<mcs48_cpu_device> m_maincpu;
required_device<pwm_display_device> m_display;
required_device<sensorboard_device> m_board;
required_device<dac_bit_interface> m_dac;
required_ioport m_inputs;
// I/O handlers
void update_display();
void mux_w(u8 data);
u8 mux_r();
void control_w(u8 data);
DECLARE_READ_LINE_MEMBER(t0_r);
u8 input_r();
bool m_kp_select = false;
u16 m_inp_mux = 0;
u8 m_led_select = 0;
};
void eldorado_state::machine_start()
{
// register for savestates
save_item(NAME(m_kp_select));
save_item(NAME(m_inp_mux));
save_item(NAME(m_led_select));
}
/******************************************************************************
I/O
******************************************************************************/
void eldorado_state::update_display()
{
m_display->matrix(m_led_select, m_inp_mux);
}
void eldorado_state::mux_w(u8 data)
{
// D0-D7: input mux, led data
m_inp_mux = ~data;
update_display();
}
u8 eldorado_state::mux_r()
{
return ~m_inp_mux;
}
void eldorado_state::control_w(u8 data)
{
// P24: speaker out
m_dac->write(BIT(~data, 4));
// P25,P26: led select
m_led_select = ~data >> 5 & 3;
update_display();
// P27: keypad select
m_kp_select = !bool(data & 0x80);
}
READ_LINE_MEMBER(eldorado_state::t0_r)
{
// T0: P27
return m_kp_select ? 0 : 1;
}
u8 eldorado_state::input_r()
{
u8 data = 0;
// P10-P17: multiplexed inputs
// read chessboard buttons
for (int i = 0; i < 8; i++)
if (BIT(m_inp_mux, i))
data |= m_board->read_file(i);
// read sidepanel keypad
if (m_kp_select)
data |= m_inputs->read();
return ~data;
}
/******************************************************************************
Input Ports
******************************************************************************/
static INPUT_PORTS_START( eldorado )
PORT_START("IN.0")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_NAME("Reverse / Pawn")
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_NAME("Move / Knight")
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_NAME("Sound / Bishop")
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_NAME("Level / Rook")
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_NAME("Verify / Queen")
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_NAME("Problem / King")
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_DEL) PORT_CODE(KEYCODE_BACKSPACE) PORT_NAME("Clear")
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_N) PORT_NAME("New Game")
INPUT_PORTS_END
/******************************************************************************
Machine Configs
******************************************************************************/
void eldorado_state::eldorado(machine_config &config)
{
/* basic machine hardware */
I8049(config, m_maincpu, 6_MHz_XTAL);
m_maincpu->p1_in_cb().set(FUNC(eldorado_state::input_r));
m_maincpu->p2_out_cb().set(FUNC(eldorado_state::control_w));
m_maincpu->bus_in_cb().set(FUNC(eldorado_state::mux_r));
m_maincpu->bus_out_cb().set(FUNC(eldorado_state::mux_w));
m_maincpu->t0_in_cb().set(FUNC(eldorado_state::t0_r));
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 */
PWM_DISPLAY(config, m_display).set_size(2, 8);
config.set_default_layout(layout_fidel_eldorado);
/* sound hardware */
SPEAKER(config, "speaker").front_center();
DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25);
}
/******************************************************************************
ROM Definitions
******************************************************************************/
ROM_START( feldo )
ROM_REGION( 0x0800, "maincpu", 0 )
ROM_LOAD("100-1027a01", 0x0000, 0x0800, CRC(3b93b6d2) SHA1(353a741624b4c7fd74a0cf601e2e52f9914b58b8) )
ROM_END
} // anonymous namespace
/******************************************************************************
Drivers
******************************************************************************/
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY, FULLNAME, FLAGS
CONS( 1990, feldo, 0, 0, eldorado, eldorado, eldorado_state, empty_init, "Fidelity Electronics / CXG Systems", "Eldorado Chess Challenger", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
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