// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** Babbage-2nd skeleton driver (19/OCT/2011) http://takeda-toshiya.my.coocan.jp/babbage/index.html Pasting: 0-F : as is INC : ^ AD : - DA : = GO : X Here is a test program to turn on the LEDs. Copy the text and Paste into the emulator. =3E^=0F^=D3^=13^=3E^=07^=D3^=13^=3E^=00^=D3^=12^=76^-1000X ToDo: - Blank the display if digits aren't being refreshed ***************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/timer.h" #include "machine/z80ctc.h" #include "machine/z80pio.h" #include "machine/z80daisy.h" #include "babbage.lh" #define MAIN_CLOCK 25e5 class babbage_state : public driver_device { public: babbage_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_pio_1(*this, "z80pio_1") , m_pio_2(*this, "z80pio_2") , m_ctc(*this, "z80ctc") , m_keyboard(*this, "X%u", 0) , m_digits(*this, "digit%u", 0U) { } void babbage(machine_config &config); protected: DECLARE_READ8_MEMBER(pio2_a_r); DECLARE_WRITE8_MEMBER(pio1_b_w); DECLARE_WRITE8_MEMBER(pio2_b_w); DECLARE_WRITE_LINE_MEMBER(ctc_z0_w); DECLARE_WRITE_LINE_MEMBER(ctc_z1_w); DECLARE_WRITE_LINE_MEMBER(ctc_z2_w); TIMER_DEVICE_CALLBACK_MEMBER(keyboard_callback); void babbage_io(address_map &map); void babbage_map(address_map &map); private: uint8_t m_segment; uint8_t m_key; uint8_t m_prev_key; bool m_step; virtual void machine_start() override { m_digits.resolve(); } required_device m_maincpu; required_device m_pio_1; required_device m_pio_2; required_device m_ctc; required_ioport_array<4> m_keyboard; output_finder<33> m_digits; }; /*************************************************************************** Address Map ***************************************************************************/ void babbage_state::babbage_map(address_map &map) { map.global_mask(0x3fff); map(0x0000, 0x07ff).rom(); map(0x1000, 0x17ff).ram(); } void babbage_state::babbage_io(address_map &map) { map.global_mask(0xff); map(0x00, 0x03).rw(m_ctc, FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); map(0x10, 0x13).rw(m_pio_1, FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); map(0x20, 0x23).rw(m_pio_2, FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); } /************************************************************************** Keyboard Layout ***************************************************************************/ // no idea of the actual key matrix static INPUT_PORTS_START( babbage ) PORT_START("X0") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_START("X1") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_START("X2") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("DA") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_START("X3") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("INC") PORT_CODE(KEYCODE_UP) PORT_CHAR('^') INPUT_PORTS_END /* Z80-CTC Interface */ WRITE_LINE_MEMBER( babbage_state::ctc_z0_w ) { } WRITE_LINE_MEMBER( babbage_state::ctc_z1_w ) { } WRITE_LINE_MEMBER( babbage_state::ctc_z2_w ) { } /* Z80-PIO Interface */ // The 8 LEDs // bios never writes here - you need to set PIO for output yourself - see test program above WRITE8_MEMBER( babbage_state::pio1_b_w ) { char ledname[8]; for (int i = 0; i < 8; i++) { sprintf(ledname,"led%d",i); output().set_value(ledname, BIT(data, i)); } } READ8_MEMBER( babbage_state::pio2_a_r ) { m_maincpu->set_input_line(0, CLEAR_LINE); // release interrupt return m_key; } WRITE8_MEMBER( babbage_state::pio2_b_w ) { if (BIT(data, 7)) { m_step = false; } else if (!m_step) { m_segment = data; m_step = true; } else { m_digits[data] = m_segment; } } static const z80_daisy_config babbage_daisy_chain[] = {// need to check the order { "z80pio_1" }, { "z80pio_2" }, { "z80ctc" }, { nullptr } }; TIMER_DEVICE_CALLBACK_MEMBER(babbage_state::keyboard_callback) { u8 inp, data = 0xff; for (u8 i = 0; i < 4; i++) { inp = m_keyboard[i]->read(); for (u8 j = 0; j < 5; j++) if (BIT(inp, j)) data = (j << 2) | i; } /* make sure only one keystroke */ if (data != m_prev_key) m_prev_key = data; else data = 0xff; /* while key is down, activate strobe. When key released, deactivate strobe which causes an interrupt */ if (data < 0xff) { m_key = data; m_pio_2->strobe(0, 0); } else m_pio_2->strobe(0, 1); } /*************************************************************************** Machine driver ***************************************************************************/ void babbage_state::babbage(machine_config &config) { /* basic machine hardware */ Z80(config, m_maincpu, MAIN_CLOCK); //2.5MHz m_maincpu->set_addrmap(AS_PROGRAM, &babbage_state::babbage_map); m_maincpu->set_addrmap(AS_IO, &babbage_state::babbage_io); m_maincpu->set_daisy_config(babbage_daisy_chain); /* video hardware */ config.set_default_layout(layout_babbage); /* Devices */ Z80CTC(config, m_ctc, MAIN_CLOCK); m_ctc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); m_ctc->zc_callback<0>().set(FUNC(babbage_state::ctc_z0_w)); m_ctc->zc_callback<1>().set(FUNC(babbage_state::ctc_z1_w)); m_ctc->zc_callback<2>().set(FUNC(babbage_state::ctc_z2_w)); Z80PIO(config, m_pio_1, MAIN_CLOCK); m_pio_1->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); m_pio_1->out_pb_callback().set(FUNC(babbage_state::pio1_b_w)); Z80PIO(config, m_pio_2, MAIN_CLOCK); m_pio_2->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); m_pio_2->in_pa_callback().set(FUNC(babbage_state::pio2_a_r)); m_pio_2->out_pb_callback().set(FUNC(babbage_state::pio2_b_w)); TIMER(config, "keyboard_timer", 0).configure_periodic(timer_device::expired_delegate(FUNC(babbage_state::keyboard_callback), this), attotime::from_hz(30)); } /*************************************************************************** Game driver ***************************************************************************/ ROM_START(babbage) ROM_REGION(0x10000, "maincpu", ROMREGION_ERASEFF) ROM_LOAD("mon.rom", 0x0000, 0x0200, CRC(469bd607) SHA1(8f3489a0f96de6a03b05c1ee01b89d9848f4b152) ) ROM_END // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1986, babbage, 0, 0, babbage, babbage, babbage_state, empty_init, "Mr Takafumi Aihara", "Babbage-2nd", MACHINE_NO_SOUND_HW )