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Diffstat (limited to 'src/mame/drivers/cxg_ch2001.cpp')
-rw-r--r-- | src/mame/drivers/cxg_ch2001.cpp | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/src/mame/drivers/cxg_ch2001.cpp b/src/mame/drivers/cxg_ch2001.cpp new file mode 100644 index 00000000000..047f0112143 --- /dev/null +++ b/src/mame/drivers/cxg_ch2001.cpp @@ -0,0 +1,193 @@ +// license:BSD-3-Clause +// copyright-holders:hap +// thanks-to:Berger +/****************************************************************************** +* +* cxg_ch2001.cpp, subdriver of machine/chessbase.cpp + +******************************************************************************* + +CXG Chess 2001 overview: +- Zilog Z8400APS @ 4 MHz (8MHz XTAL) +- 2KB RAM HM6116, 16KB ROM D27128D +- TTL, piezo, 8*8+9 LEDs, magnetic sensors + +******************************************************************************/ + +#include "emu.h" +#include "includes/chessbase.h" + +#include "cpu/z80/z80.h" +#include "sound/dac.h" +#include "sound/volt_reg.h" +#include "speaker.h" + +// internal artwork +#include "cxg_ch2001.lh" // clickable + + +namespace { + +class ch2001_state : public chessbase_state +{ +public: + ch2001_state(const machine_config &mconfig, device_type type, const char *tag) : + chessbase_state(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_irq_on(*this, "irq_on"), + m_dac(*this, "dac"), + m_speaker_off(*this, "speaker_off") + { } + + // machine drivers + void ch2001(machine_config &config); + +private: + // devices/pointers + required_device<cpu_device> m_maincpu; + required_device<timer_device> m_irq_on; + required_device<dac_bit_interface> m_dac; + required_device<timer_device> m_speaker_off; + + // periodic interrupts + template<int Line> TIMER_DEVICE_CALLBACK_MEMBER(irq_on) { m_maincpu->set_input_line(Line, ASSERT_LINE); } + template<int Line> TIMER_DEVICE_CALLBACK_MEMBER(irq_off) { m_maincpu->set_input_line(Line, CLEAR_LINE); } + + TIMER_DEVICE_CALLBACK_MEMBER(speaker_off) { m_dac->write(0); } + + // address maps + void main_map(address_map &map); + + // I/O handlers + DECLARE_WRITE8_MEMBER(speaker_w); + DECLARE_WRITE8_MEMBER(leds_w); + DECLARE_READ8_MEMBER(input_r); +}; + + + +/****************************************************************************** + Devices, I/O +******************************************************************************/ + +// TTL + +WRITE8_MEMBER(ch2001_state::speaker_w) +{ + // 74ls109 clock pulse to speaker + m_dac->write(1); + m_speaker_off->adjust(attotime::from_usec(200)); // not accurate +} + +WRITE8_MEMBER(ch2001_state::leds_w) +{ + // d0-d7: 74ls273 (WR to CLK) + // 74ls273 Q1-Q4: 74ls145 A-D + // 74ls145 0-9: input mux/led select + m_inp_mux = 1 << (data & 0xf) & 0x3ff; + + // 74ls273 Q5-Q8: MC14028 A-D + // MC14028 Q0-Q7: led data, Q8,Q9: N/C + u8 led_data = 1 << (data >> 4 & 0xf) & 0xff; + display_matrix(8, 10, led_data, m_inp_mux); +} + +READ8_MEMBER(ch2001_state::input_r) +{ + // d0-d7: multiplexed inputs + return ~read_inputs(10); +} + + + +/****************************************************************************** + Address Maps +******************************************************************************/ + +void ch2001_state::main_map(address_map &map) +{ + map(0x0000, 0x3fff).rom(); + map(0x4000, 0x47ff).mirror(0x3800).ram(); + map(0x8000, 0x8000).mirror(0x3fff).rw(FUNC(ch2001_state::input_r), FUNC(ch2001_state::leds_w)); + map(0xc000, 0xc000).mirror(0x3fff).w(FUNC(ch2001_state::speaker_w)); +} + + + +/****************************************************************************** + Input Ports +******************************************************************************/ + +static INPUT_PORTS_START( ch2001 ) + PORT_INCLUDE( generic_cb_magnets ) + + PORT_START("IN.8") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Black") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_NAME("King") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_NAME("Queen") + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_NAME("Rook") + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_W) PORT_NAME("Bishop") + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_NAME("Knight") + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("Pawn") + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_NAME("White") + + PORT_START("IN.9") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_NAME("Set up") + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Q) PORT_NAME("New Game") + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_U) PORT_NAME("Take Back") + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Y) PORT_NAME("Forward") + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_NAME("Hint") + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_I) PORT_NAME("Move") + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_8) PORT_NAME("Level") + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_7) PORT_NAME("Sound") +INPUT_PORTS_END + + + +/****************************************************************************** + Machine Drivers +******************************************************************************/ + +void ch2001_state::ch2001(machine_config &config) +{ + /* basic machine hardware */ + Z80(config, m_maincpu, 8_MHz_XTAL/2); + m_maincpu->set_addrmap(AS_PROGRAM, &ch2001_state::main_map); + + const attotime irq_period = attotime::from_hz(484); // theoretical frequency from 555 timer (22nF, 100K+33K, 1K2), measurement was 568Hz + TIMER(config, m_irq_on).configure_periodic(FUNC(ch2001_state::irq_on<INPUT_LINE_IRQ0>), irq_period); + m_irq_on->set_start_delay(irq_period - attotime::from_nsec(18300)); // active for 18.3us + TIMER(config, "irq_off").configure_periodic(FUNC(ch2001_state::irq_off<INPUT_LINE_IRQ0>), irq_period); + + TIMER(config, m_speaker_off).configure_generic(FUNC(ch2001_state::speaker_off)); + + TIMER(config, "display_decay").configure_periodic(FUNC(ch2001_state::display_decay_tick), attotime::from_msec(1)); + config.set_default_layout(layout_cxg_ch2001); + + /* 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( ch2001 ) + ROM_REGION( 0x10000, "maincpu", 0 ) + ROM_LOAD("ch2001.bin", 0x0000, 0x4000, CRC(b3485c73) SHA1(f405c6f67fe70edf45dcc383a4049ee6bad387a9) ) // D27128D, no label +ROM_END + +} // anonymous namespace + + + +/****************************************************************************** + Drivers +******************************************************************************/ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +CONS( 1984, ch2001, 0, 0, ch2001, ch2001, ch2001_state, empty_init, "CXG", "Chess 2001", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS ) |