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+// 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.
+
+Paste test:
+ Paste --1C00^11^22^33^44^55^66^77^88^99^---1C00^
+ Press = to verify the data that was entered.
+
+*******************************************************************************************/
+
+#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"
+
+
+namespace {
+
+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_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:
+ uint8_t keyboard_r();
+ void keyboard_w(uint8_t data);
+ void leds_w(uint8_t data);
+ TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
+ void io_map(address_map &map) ATTR_COLD;
+ void mem_map(address_map &map) ATTR_COLD;
+
+ uint8_t m_keyrow = 0U;
+ bool m_ledready = false;
+ bool m_cassbit = false, m_cassold = false;
+ u16 m_cass_cnt = 0U;
+ virtual void machine_reset() override ATTR_COLD;
+ virtual void machine_start() override ATTR_COLD;
+ required_device<cpu_device> m_maincpu;
+ required_device<i8255_device> m_ppi1;
+ required_device<cassette_image_device> m_cass;
+ required_ioport_array<9> m_io_keyboard;
+ output_finder<9> m_digits;
+};
+
+
+uint8_t 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;
+}
+
+void pmi80_state::keyboard_w(uint8_t data)
+{
+ m_keyrow = data;
+ m_ledready = true;
+}
+
+void pmi80_state::leds_w(uint8_t data)
+{
+ 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::mem_map(address_map &map)
+{
+ map.unmap_value_high();
+ map.global_mask(0xdfff); // A13 not used
+ map(0x0000, 0x07ff).rom();
+ map(0x1c00, 0x1fff).ram();
+}
+
+void pmi80_state::io_map(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, FUNC(pmi80_state::reset_button), 0) PORT_CHAR('W')
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(pmi80_state::int_button), 0) PORT_CHAR('I')
+ PORT_START("X0")
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("=") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('^')
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('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_CHAR('7')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('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_CHAR('B')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9 HL") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
+ PORT_START("X3")
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('-')// Memory mode
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
+ PORT_START("X4")
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BR") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') // Breakpoint
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D DE") PORT_CODE(KEYCODE_D) PORT_CHAR('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) PORT_CHAR('R') // Registers
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("EX") PORT_CODE(KEYCODE_G) PORT_CHAR('X') // Go
+ PORT_START("X6")
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('L') // Load tape
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A AF") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8 SP") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
+ PORT_START("X7")
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S') // Save tape
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('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_CHAR('2')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('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();
+
+ save_item(NAME(m_keyrow));
+ save_item(NAME(m_ledready));
+ save_item(NAME(m_cassbit));
+ save_item(NAME(m_cassold));
+ save_item(NAME(m_cass_cnt));
+}
+
+
+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::mem_map);
+ m_maincpu->set_addrmap(AS_IO, &pmi80_state::io_map);
+
+ 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
+
+} // anonymous namespace
+
+
+/* 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", MACHINE_SUPPORTS_SAVE )