// license:BSD-3-Clause // copyright-holders:hap // thanks-to:Berger /****************************************************************************** Novag Micro II (model 821) This program was used in several Novag chesscomputers: - Novag Micro II (1st use) - Novag Micro III - Novag Presto - Novag Octo suspected, to be confirmed: - Novag Allegro - Novag Piccolo - Novag Alto Hardware notes: Micro II, Micro III(same pcb): - Mitsubishi M5L8049-079P-6, 6MHz XTAL - buzzer, 20 leds, 8*8 chessboard buttons Presto (listed differences): - NEC D80C49C MCU(serial 186), OSC from LC circuit measured ~6MHz Octo (listed differences): - NEC D80C49HC MCU(serial 111), 12MHz OSC from LC circuit, this was advertised as 15MHz on the box, but measured ~12MHz (older Octo version is probably ~6MHz?) - speaker circuit is a bit different, not sure why Note that even though the MCUs are different, internal ROM contents was confirmed to be identical for Micro II/III, Presto, Octo. TODO: - controls are too sensitive, is there a bug in the CPU core timer emulation? 6MHz: valid (single) button press registered between 307ms and 436ms, 12MHz: between 154ms and 218ms. ******************************************************************************/ #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 "novag_micro2.lh" // clickable namespace { class micro2_state : public driver_device { public: micro2_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 micro2(machine_config &config); DECLARE_INPUT_CHANGED_MEMBER(cpu_freq) { set_cpu_freq(); } protected: virtual void machine_start() override; virtual void machine_reset() override { set_cpu_freq(); } private: void set_cpu_freq(); // devices/pointers required_device m_maincpu; required_device m_display; required_device m_board; required_device m_dac; required_ioport m_inputs; // I/O handlers void update_display(); void mux_w(u8 data); void control_w(u8 data); u8 input_r(); bool m_kp_select = false; u8 m_inp_mux = 0; u8 m_led_select = 0; }; void micro2_state::machine_start() { // register for savestates save_item(NAME(m_kp_select)); save_item(NAME(m_inp_mux)); save_item(NAME(m_led_select)); } void micro2_state::set_cpu_freq() { // known CPU speeds: 6MHz(XTAL), 6MHz(LC), 12MHz(LC) u32 clock = (ioport("FAKE")->read() & 1) ? 12000000 : 6000000; m_board->set_delay(attotime::from_ticks(2000000, clock)); // see TODO m_maincpu->set_unscaled_clock(clock); } /****************************************************************************** I/O ******************************************************************************/ // MCU ports/generic void micro2_state::update_display() { m_display->matrix(m_led_select, m_inp_mux); } void micro2_state::mux_w(u8 data) { // D0-D7: input mux, led data m_inp_mux = ~data; update_display(); } void micro2_state::control_w(u8 data) { // P21: keypad select m_kp_select = bool(~data & 2); // P22,P23: speaker lead 1,2 m_dac->write(BIT(data, 2) & BIT(~data, 3)); // P24-P26: led select m_led_select = ~data >> 4 & 7; update_display(); } u8 micro2_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_rank(i); // read sidepanel keypad if (m_kp_select) data |= m_inputs->read(); return ~data; } /****************************************************************************** Input Ports ******************************************************************************/ static INPUT_PORTS_START( micro2 ) PORT_START("IN.0") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_NAME("B/W") // aka "Black/White" or "Change Color" PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_NAME("Verify / Pawn") PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_NAME("Set Up / Rook") PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_NAME("Knight") PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_NAME("Level / Bishop") PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_NAME("Queen") PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD) PORT_NAME("Take Back / King") PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD) PORT_NAME("Go") PORT_START("FAKE") PORT_CONFNAME( 0x01, 0x00, "CPU Frequency" ) PORT_CHANGED_MEMBER(DEVICE_SELF, micro2_state, cpu_freq, 0) // factory set PORT_CONFSETTING( 0x00, "6MHz" ) PORT_CONFSETTING( 0x01, "12MHz" ) INPUT_PORTS_END /****************************************************************************** Machine Configs ******************************************************************************/ void micro2_state::micro2(machine_config &config) { /* basic machine hardware */ I8049(config, m_maincpu, 6_MHz_XTAL); // see set_cpu_freq m_maincpu->p1_in_cb().set(FUNC(micro2_state::input_r)); m_maincpu->p2_out_cb().set(FUNC(micro2_state::control_w)); m_maincpu->bus_out_cb().set(FUNC(micro2_state::mux_w)); SENSORBOARD(config, m_board).set_type(sensorboard_device::BUTTONS); m_board->init_cb().set(m_board, FUNC(sensorboard_device::preset_chess)); /* video hardware */ PWM_DISPLAY(config, m_display).set_size(3, 8); config.set_default_layout(layout_novag_micro2); /* sound hardware */ SPEAKER(config, "speaker").front_center(); DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25); } /****************************************************************************** ROM Definitions ******************************************************************************/ ROM_START( nmicro2 ) ROM_REGION( 0x0800, "maincpu", 0 ) ROM_LOAD("8049_8210.u1", 0x0000, 0x0800, CRC(29a0eb4c) SHA1(e058d6018e53ddcaa3b5ec25b33b8bff091b04db) ) ROM_END } // anonymous namespace /****************************************************************************** Drivers ******************************************************************************/ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY, FULLNAME, FLAGS CONS( 1982, nmicro2, 0, 0, micro2, micro2, micro2_state, empty_init, "Novag", "Micro II (Novag)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )