// license:BSD-3-Clause // copyright-holders:Robbbert /******************************************************************************************** Tesla PMI-80 2009-05-12 Skeleton driver. 2011-06-20 Made mostly working 2019-06-27 More work done ToDo: - cassette (coded per schematic, but not working ("SPAT" error)) - I button (should cause an interrupt and jump to 0038 - currently nothing happens) Notes: - Keyboard consists of 16 black hex keys, and 9 blue function keys - The hex keys are 0 through 9, A through F on our keyboard - The function key labels are RE, I, EX, R, BR, M, L, S, = - The letter M shows as an inverted U in the display - Turn it on, it says ''PMI -80'' - Press any key, it shows a ? at the left - Press the function key corresponding to what you want to do - Press the numbers to select an address or whatever - For example, press M then enter an address, press =, enter data, press = to increment to next address or to scan through them. - PPI1 is programmed to mode 0, Port A output, Port B input, PC0-3 output, PC4-7 input. *******************************************************************************************/ #include "emu.h" #include "cpu/i8085/i8085.h" #include "machine/i8255.h" #include "imagedev/cassette.h" #include "machine/timer.h" #include "speaker.h" #include "pmi80.lh" class pmi80_state : public driver_device { public: pmi80_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_ledready(0) , m_cassbit(0) , m_cassold(0) , m_cass_cnt(0) , m_maincpu(*this, "maincpu") , m_ppi1(*this, "ppi1") , m_cass(*this, "cassette") , m_io_keyboard(*this, "X%u", 0U) , m_digits(*this, "digit%u", 0U) { } void pmi80(machine_config &config); DECLARE_INPUT_CHANGED_MEMBER(reset_button); DECLARE_INPUT_CHANGED_MEMBER(int_button); private: DECLARE_READ8_MEMBER(keyboard_r); DECLARE_WRITE8_MEMBER(keyboard_w); DECLARE_WRITE8_MEMBER(leds_w); TIMER_DEVICE_CALLBACK_MEMBER(kansas_r); void pmi80_io(address_map &map); void pmi80_mem(address_map &map); uint8_t m_keyrow; bool m_ledready; bool m_cassbit,m_cassold; u16 m_cass_cnt; virtual void machine_reset() override; virtual void machine_start() override; required_device m_maincpu; required_device m_ppi1; required_device m_cass; required_ioport_array<9> m_io_keyboard; output_finder<9> m_digits; }; READ8_MEMBER( pmi80_state::keyboard_r) { u8 data = 0x7f; if (m_keyrow > 0xF6) data &= m_io_keyboard[m_keyrow-0xf7]->read(); data |= (m_cassbit) ? 0x80 : 0; return data; } WRITE8_MEMBER( pmi80_state::keyboard_w ) { m_keyrow = data; m_ledready = true; } WRITE8_MEMBER( pmi80_state::leds_w ) { if (m_ledready) { m_ledready = false; if (m_keyrow > 0xF6) m_digits[m_keyrow^0xff] = data^0xff; } data &= 0xc0; m_cass->output((data == 0xc0) ? -1.0 : +1.0); } TIMER_DEVICE_CALLBACK_MEMBER( pmi80_state::kansas_r ) { // cassette - pulses = 1; no pulses = 0 m_cass_cnt++; bool cass_ws = (m_cass->input() > +0.04) ? 1 : 0; if (cass_ws != m_cassold) { m_cassold = cass_ws; m_cassbit = (m_cass_cnt < 40) ? 1 : 0; m_cass_cnt = 0; } } void pmi80_state::pmi80_mem(address_map &map) { map.unmap_value_high(); map.global_mask(0xdfff); // A13 not used map(0x0000, 0x07ff).rom().region("maincpu", 0); map(0x1c00, 0x1fff).ram(); } void pmi80_state::pmi80_io(address_map &map) { map.unmap_value_high(); map.global_mask(0x0f); map(0x04, 0x07).rw("ppi2", FUNC(i8255_device::read), FUNC(i8255_device::write)); // io12, 0xf4-0xf7 map(0x08, 0x0b).rw("ppi1", FUNC(i8255_device::read), FUNC(i8255_device::write)); // io8, 0xf8-0xfb } /* Input ports */ static INPUT_PORTS_START( pmi80 ) PORT_START("SP") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RE") PORT_CODE(KEYCODE_LALT) PORT_CHANGED_MEMBER(DEVICE_SELF, pmi80_state, reset_button, 0) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHANGED_MEMBER(DEVICE_SELF, pmi80_state, int_button, 0) PORT_START("X0") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("=") PORT_CODE(KEYCODE_EQUALS) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_START("X1") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_START("X2") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B BC") PORT_CODE(KEYCODE_B) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9 HL") PORT_CODE(KEYCODE_9) PORT_START("X3") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) // Memory mode PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_START("X4") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BR") PORT_CODE(KEYCODE_Q) // Breakpoint PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D DE") PORT_CODE(KEYCODE_D) PORT_START("X5") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) // Registers PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("EX") PORT_CODE(KEYCODE_G) // Go PORT_START("X6") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) // Load tape PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A AF") PORT_CODE(KEYCODE_A) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8 SP") PORT_CODE(KEYCODE_8) PORT_START("X7") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) // Save tape PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_START("X8") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) INPUT_PORTS_END INPUT_CHANGED_MEMBER(pmi80_state::reset_button) { m_maincpu->set_input_line(INPUT_LINE_RESET, oldval ? ASSERT_LINE : CLEAR_LINE); } INPUT_CHANGED_MEMBER(pmi80_state::int_button) { m_maincpu->set_input_line(INPUT_LINE_IRQ0, oldval ? ASSERT_LINE : CLEAR_LINE); // FIXME: jump to 0x0038 } void pmi80_state::machine_reset() { } void pmi80_state::machine_start() { m_digits.resolve(); } void pmi80_state::pmi80(machine_config &config) { /* basic machine hardware */ I8080(config, m_maincpu, XTAL(10'000'000)/9); // 10MHz divided by 9 (by MH8224) m_maincpu->set_addrmap(AS_PROGRAM, &pmi80_state::pmi80_mem); m_maincpu->set_addrmap(AS_IO, &pmi80_state::pmi80_io); I8255A(config, m_ppi1); m_ppi1->out_pa_callback().set(FUNC(pmi80_state::leds_w)); m_ppi1->in_pc_callback().set(FUNC(pmi80_state::keyboard_r)); m_ppi1->out_pc_callback().set(FUNC(pmi80_state::keyboard_w)); I8255A(config, "ppi2"); // User PPI SPEAKER(config, "mono").front_center(); // cassette CASSETTE(config, m_cass); m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_SPEAKER_ENABLED | CASSETTE_MOTOR_ENABLED); m_cass->add_route(ALL_OUTPUTS, "mono", 0.05); TIMER(config, "kansas_r").configure_periodic(FUNC(pmi80_state::kansas_r), attotime::from_hz(40000)); /* video hardware */ config.set_default_layout(layout_pmi80); } /* ROM definition */ ROM_START( pmi80 ) ROM_REGION( 0x0800, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "pmi80_monitor.io5", 0x0000, 0x0400, CRC(b93f4407) SHA1(43153441070ed0572f33d2815635eb7bae878e38)) //ROM_LOAD("expansion.io11", 0x0400, 0x0400, NO_DUMP) Empty ROM socket ROM_END /* Driver */ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1982, pmi80, 0, 0, pmi80, pmi80, pmi80_state, empty_init, "Tesla", "PMI-80", 0)