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-rw-r--r--src/mame/drivers/h8.cpp381
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diff --git a/src/mame/drivers/h8.cpp b/src/mame/drivers/h8.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Robbbert
-/***************************************************************************
-
- Heathkit H8
-
- 2009-05-12 Skeleton driver.
-
- This system uses Octal rather than the usual hexadecimal.
-
-STATUS:
- It runs, keyboard works, you can enter data.
-
-Meaning of LEDs:
- PWR = power is turned on
- MON = controls should work
- RUN = CPU is running (not halted)
- ION = Interrupts are enabled
-
-Pasting:
- 0-F : as is
- + : ^
- - : V
- MEM : -
- ALTER : =
-
- Addresses must have all 6 digits entered.
- Data must have all 3 digits entered.
- System has a short beep for each key, and a slightly longer beep
- for each group of 3 digits. The largest number allowed is 377 (=0xFF).
-
-Test Paste:
- -041000=123 245 333 144 255 366 077=-041000
- Now press up-arrow to confirm the data has been entered.
-
-Official test program from pages 4 to 8 of the operator's manual:
- -040100=076 002 062 010 040 006 004 041 170 040 021 013 040 016 011 176
- 022 043 023 015 302 117 040 016 003 076 377 315 053 000 015 302
- 131 040 005 302 112 040 076 062 315 140 002 076 062 315 053 000
- 076 062 315 140 002 303 105 040 377 262 270 272 275 377 222 200
- 377 237 244 377 272 230 377 220 326 302 377 275 272 271 271 373
- 271 240 377 236 376 362 236 376 362 236 376 362 R6=040100=4
-
-
-****************************************************************************/
-
-#include "emu.h"
-
-#include "cpu/i8085/i8085.h"
-#include "machine/i8251.h"
-#include "machine/clock.h"
-#include "machine/timer.h"
-#include "imagedev/cassette.h"
-#include "sound/beep.h"
-#include "speaker.h"
-
-#include "h8.lh"
-
-
-class h8_state : public driver_device
-{
-public:
- h8_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_uart(*this, "uart")
- , m_cass(*this, "cassette")
- , m_beep(*this, "beeper")
- , m_digits(*this, "digit%u", 0U)
- { }
-
- void h8(machine_config &config);
-
- DECLARE_INPUT_CHANGED_MEMBER(button_0);
-
-private:
- DECLARE_READ8_MEMBER(portf0_r);
- DECLARE_WRITE8_MEMBER(portf0_w);
- DECLARE_WRITE8_MEMBER(portf1_w);
- DECLARE_WRITE8_MEMBER(h8_status_callback);
- DECLARE_WRITE_LINE_MEMBER(h8_inte_callback);
- TIMER_DEVICE_CALLBACK_MEMBER(h8_irq_pulse);
- TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
- TIMER_DEVICE_CALLBACK_MEMBER(kansas_w);
-
- void h8_io(address_map &map);
- void h8_mem(address_map &map);
-
- uint8_t m_digit;
- uint8_t m_segment;
- uint8_t m_irq_ctl;
- bool m_ff_b;
- uint8_t m_cass_data[4];
- bool m_cassbit;
- bool m_cassold;
- virtual void machine_reset() override;
- virtual void machine_start() override { m_digits.resolve(); }
- required_device<i8080_cpu_device> m_maincpu;
- required_device<i8251_device> m_uart;
- required_device<cassette_image_device> m_cass;
- required_device<beep_device> m_beep;
- output_finder<16> m_digits;
-};
-
-
-#define H8_CLOCK (XTAL(12'288'000) / 6)
-#define H8_BEEP_FRQ (H8_CLOCK / 1024)
-#define H8_IRQ_PULSE (H8_BEEP_FRQ / 2)
-
-
-TIMER_DEVICE_CALLBACK_MEMBER(h8_state::h8_irq_pulse)
-{
- if (BIT(m_irq_ctl, 0))
- m_maincpu->set_input_line_and_vector(INPUT_LINE_IRQ0, ASSERT_LINE, 0xcf); // I8080
-}
-
-READ8_MEMBER( h8_state::portf0_r )
-{
- // reads the keyboard
-
- // The following not emulated, can occur any time even if keyboard not being scanned
- // - if 0 and RTM pressed, causes int10
- // - if 0 and RST pressed, resets cpu
-
- uint8_t i,keyin,data = 0xff;
-
- keyin = ioport("X0")->read();
- if (keyin != 0xff)
- {
- for (i = 1; i < 8; i++)
- if (!BIT(keyin,i))
- data &= ~(i<<1);
- data &= 0xfe;
- }
-
- keyin = ioport("X1")->read();
- if (keyin != 0xff)
- {
- for (i = 1; i < 8; i++)
- if (!BIT(keyin,i))
- data &= ~(i<<5);
- data &= 0xef;
- }
- return data;
-}
-
-WRITE8_MEMBER( h8_state::portf0_w )
-{
- // this will always turn off int10 that was set by the timer
- // d0-d3 = digit select
- // d4 = int20 is allowed
- // d5 = mon led
- // d6 = int10 is allowed
- // d7 = beeper enable
-
- m_digit = data & 15;
- if (m_digit) m_digits[m_digit] = m_segment;
-
- output().set_value("mon_led", !BIT(data, 5));
- m_beep->set_state(!BIT(data, 7));
-
- m_maincpu->set_input_line(INPUT_LINE_IRQ0, CLEAR_LINE);
- m_irq_ctl &= 0xf0;
- if (BIT(data, 6)) m_irq_ctl |= 1;
- if (!BIT(data, 4)) m_irq_ctl |= 2;
-}
-
-WRITE8_MEMBER( h8_state::portf1_w )
-{
- //d7 segment dot
- //d6 segment f
- //d5 segment e
- //d4 segment d
- //d3 segment c
- //d2 segment b
- //d1 segment a
- //d0 segment g
-
- m_segment = 0xff ^ bitswap<8>(data, 7, 0, 6, 5, 4, 3, 2, 1);
- if (m_digit) m_digits[m_digit] = m_segment;
-}
-
-void h8_state::h8_mem(address_map &map)
-{
- map.unmap_value_high();
- map(0x0000, 0x0fff).rom(); // main rom
- map(0x1400, 0x17ff).ram(); // fdc ram
- map(0x1800, 0x1fff).rom(); // fdc rom
- map(0x2000, 0x9fff).ram(); // main ram
-}
-
-void h8_state::h8_io(address_map &map)
-{
- map.unmap_value_high();
- map.global_mask(0xff);
- map(0xf0, 0xf0).rw(FUNC(h8_state::portf0_r), FUNC(h8_state::portf0_w));
- map(0xf1, 0xf1).w(FUNC(h8_state::portf1_w));
- map(0xf8, 0xf9).rw(m_uart, FUNC(i8251_device::read), FUNC(i8251_device::write));
- // optional connection to a serial terminal @ 600 baud
- //map(0xfa, 0xfb).rw("uart1", FUNC(i8251_device::read), FUNC(i8251_device::write));
-}
-
-/* Input ports */
-static INPUT_PORTS_START( h8 )
- PORT_START("X0")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHANGED_MEMBER(DEVICE_SELF, h8_state, button_0, 0)
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("1 SP") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("2 AF") PORT_CODE(KEYCODE_2) PORT_CHAR('2')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("3 BC") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("4 DE GO") PORT_CODE(KEYCODE_4) PORT_CHAR('4')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("5 HL IN") PORT_CODE(KEYCODE_5) PORT_CHAR('5')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("6 PC OUT") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("7 SI") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
-
- PORT_START("X1")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("8 LOAD") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("9 DUMP") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("-") PORT_CODE(KEYCODE_DOWN) PORT_CHAR('V')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("* CANCEL") PORT_CODE(KEYCODE_ESC) PORT_CHAR('Q')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("/ ALTER RST") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("# MEM RTM") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(". REG") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
-INPUT_PORTS_END
-
-INPUT_CHANGED_MEMBER(h8_state::button_0)
-{
- if (newval)
- {
- u8 data = ioport("X1")->read() ^ 0xff;
- if (BIT(data, 5))
- m_maincpu->reset();
- else
- if (BIT(data, 6))
- m_maincpu->set_input_line_and_vector(INPUT_LINE_IRQ0, ASSERT_LINE, 0xcf); // INT 10 // I8080
- }
-}
-
-void h8_state::machine_reset()
-{
- output().set_value("pwr_led", 0);
- m_irq_ctl = 1;
- m_cassbit = 1;
- m_cass_data[0] = 0;
- m_cass_data[1] = 0;
- m_uart->write_cts(0);
- m_uart->write_dsr(0);
- m_uart->write_rxd(0);
- m_cass_data[3] = 0;
- m_ff_b = 1;
-}
-
-WRITE_LINE_MEMBER( h8_state::h8_inte_callback )
-{
- // operate the ION LED
- output().set_value("ion_led", !state);
- m_irq_ctl &= 0x7f | ((state) ? 0 : 0x80);
-}
-
-WRITE8_MEMBER( h8_state::h8_status_callback )
-{
-/* This is rather messy, but basically there are 2 D flipflops, one drives the other,
-the data is /INTE while the clock is /M1. If the system is in Single Instruction mode,
-a int20 (output of 2nd flipflop) will occur after 4 M1 steps, to pause the running program.
-But, all of this can only occur if bit 4 of port F0 is low. */
-
- bool state = (data & i8080_cpu_device::STATUS_M1) ? 0 : 1;
- bool c,a = BIT(m_irq_ctl, 7);
-
- if (BIT(m_irq_ctl, 1))
- {
- if (!state) // rising pulse to push data through flipflops
- {
- c = !m_ff_b; // from /Q of 2nd flipflop
- m_ff_b = a; // from Q of 1st flipflop
- if (c)
- m_maincpu->set_input_line_and_vector(INPUT_LINE_IRQ0, ASSERT_LINE, 0xd7); // I8080
- }
- }
- else
- { // flipflops are 'set'
- c = 0;
- m_ff_b = 1;
- }
-
-
- // operate the RUN LED
- output().set_value("run_led", state);
-}
-
-TIMER_DEVICE_CALLBACK_MEMBER(h8_state::kansas_w)
-{
- m_cass_data[3]++;
-
- if (m_cassbit != m_cassold)
- {
- m_cass_data[3] = 0;
- m_cassold = m_cassbit;
- }
-
- if (m_cassbit)
- m_cass->output(BIT(m_cass_data[3], 0) ? -1.0 : +1.0); // 2400Hz
- else
- m_cass->output(BIT(m_cass_data[3], 1) ? -1.0 : +1.0); // 1200Hz
-}
-
-TIMER_DEVICE_CALLBACK_MEMBER(h8_state::kansas_r)
-{
- /* cassette - turn 1200/2400Hz to a bit */
- m_cass_data[1]++;
- uint8_t cass_ws = (m_cass->input() > +0.03) ? 1 : 0;
-
- if (cass_ws != m_cass_data[0])
- {
- m_cass_data[0] = cass_ws;
- m_uart->write_rxd((m_cass_data[1] < 12) ? 1 : 0);
- m_cass_data[1] = 0;
- }
-}
-
-void h8_state::h8(machine_config &config)
-{
- /* basic machine hardware */
- I8080(config, m_maincpu, H8_CLOCK);
- m_maincpu->set_addrmap(AS_PROGRAM, &h8_state::h8_mem);
- m_maincpu->set_addrmap(AS_IO, &h8_state::h8_io);
- m_maincpu->out_status_func().set(FUNC(h8_state::h8_status_callback));
- m_maincpu->out_inte_func().set(FUNC(h8_state::h8_inte_callback));
-
- /* video hardware */
- config.set_default_layout(layout_h8);
-
- /* sound hardware */
- SPEAKER(config, "mono").front_center();
- BEEP(config, m_beep, H8_BEEP_FRQ).add_route(ALL_OUTPUTS, "mono", 1.00);
-
- /* Devices */
- I8251(config, m_uart, 0);
- m_uart->txd_handler().set([this] (bool state) { m_cassbit = state; });
-
- clock_device &cassette_clock(CLOCK(config, "cassette_clock", 4800));
- cassette_clock.signal_handler().set(m_uart, FUNC(i8251_device::write_txc));
- cassette_clock.signal_handler().append(m_uart, FUNC(i8251_device::write_rxc));
-
- CASSETTE(config, m_cass);
- m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
- m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
- m_cass->set_interface("h8_cass");
-
- TIMER(config, "kansas_w").configure_periodic(FUNC(h8_state::kansas_w), attotime::from_hz(4800));
- TIMER(config, "kansas_r").configure_periodic(FUNC(h8_state::kansas_r), attotime::from_hz(40000));
- TIMER(config, "h8_timer").configure_periodic(FUNC(h8_state::h8_irq_pulse), attotime::from_hz(H8_IRQ_PULSE));
-}
-
-/* ROM definition */
-ROM_START( h8 )
- ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
- // H17 fdc bios - needed by bios2&3
- ROM_LOAD( "2716_444-19_h17.rom", 0x1800, 0x0800, CRC(26e80ae3) SHA1(0c0ee95d7cb1a760f924769e10c0db1678f2435c))
-
- ROM_SYSTEM_BIOS(0, "bios0", "Standard")
- ROMX_LOAD( "2708_444-13_pam8.rom", 0x0000, 0x0400, CRC(e0745513) SHA1(0e170077b6086be4e5cd10c17e012c0647688c39), ROM_BIOS(0) )
-
- ROM_SYSTEM_BIOS(1, "bios1", "Alternate")
- ROMX_LOAD( "2708_444-13_pam8go.rom", 0x0000, 0x0400, CRC(9dbad129) SHA1(72421102b881706877f50537625fc2ab0b507752), ROM_BIOS(1) )
-
- ROM_SYSTEM_BIOS(2, "bios2", "Disk OS")
- ROMX_LOAD( "2716_444-13_pam8at.rom", 0x0000, 0x0800, CRC(fd95ddc1) SHA1(eb1f272439877239f745521139402f654e5403af), ROM_BIOS(2) )
-
- ROM_SYSTEM_BIOS(3, "bios3", "Disk OS Alt")
- ROMX_LOAD( "2732_444-70_xcon8.rom", 0x0000, 0x1000, CRC(b04368f4) SHA1(965244277a3a8039a987e4c3593b52196e39b7e7), ROM_BIOS(3) )
-
- // this one runs off into the weeds
- ROM_SYSTEM_BIOS(4, "bios4", "not working")
- ROMX_LOAD( "2732_444-140_pam37.rom", 0x0000, 0x1000, CRC(53a540db) SHA1(90082d02ffb1d27e8172b11fff465bd24343486e), ROM_BIOS(4) )
-ROM_END
-
-/* Driver */
-
-/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS, INIT COMPANY FULLNAME FLAGS */
-COMP( 1977, h8, 0, 0, h8, h8, h8_state, empty_init, "Heath Company", "Heathkit H8 Digital Computer", 0 )