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diff --git a/src/mame/drivers/kim1.cpp b/src/mame/drivers/kim1.cpp
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-// license:GPL-2.0+
-// copyright-holders:Juergen Buchmueller
-/******************************************************************************
-
- kim1.cpp - KIM-1
-
- LED: six 7-segment LEDs
- left 4 digits (address)
- right 2 digits (data)
- Keyboard: 23 keys and SST switch
- 0-F 16 keys to enter data
- AD address entry mode
- DA data entry mode
- + increment address
- PC recalls address stored in the Program Counter
- RS system reset
- GO execute program
- ST program stop
- SST single step slide switch
-
- How to use cassette:
- 00F1 00 to clear decimal mode
- 17F5-17F6 start address low and high
- 17F7-17F8 end address low and high
- 17F9 2 digit program ID
- 1800 press GO to save tape
- 1873 press GO to load tape
- NOTE: save end address is next address from program end
-
-The cassette interface
-======================
-The KIM-1 stores data on cassette using 2 frequencies: ~3700Hz (high) and ~2400Hz
-(low). A high tone is output for 9 cycles and a low tone for 6 cycles. A logic bit
-is encoded using 3 sequences of high and low tones. It always starts with a high
-tone and ends with a low tone. The middle tone is high for a logic 0 and low for
-0 logic 1.
-
-These high and low tone signals are fed to a circuit containing a LM565 PLL and
-a 311 comparator. For a high tone a 1 is passed to DB7 of 6530-U2 for a low tone
-a 0 is passed. The KIM-1 software measures the time it takes for the signal to
-change from 1 to 0.
-
-Keyboard and Display logic
-==========================
-PA0-PA6 of 6530-U2 are connected to the columns of the keyboard matrix. These
-columns are also connected to segments A-G of the LEDs. PB1-PB3 of 6530-U2 are
-connected to a 74145 BCD which connects outputs 0-2 to the rows of the keyboard
-matrix. Outputs 4-9 of the 74145 are connected to LEDs U18-U23
-
-When a key is pressed the corresponding input to PA0-PA6 is set low and the KIM-1
-software reads this signal. The KIM-1 software sends an output signal to PA0-PA6
-and the corresponding segments of an LED are illuminated.
-
-TODO:
-- LEDs should be dark at startup (RS key to activate)
-- hook up Single Step dip switch
-- slots for expansion & application ports
-- add TTY support
-
-Paste test:
- N-0100=11^22^33^44^55^66^77^88^99^-0100=
- Press UP to verify data.
-
-******************************************************************************/
-
-#include "emu.h"
-
-#include "cpu/m6502/m6502.h"
-#include "formats/kim1_cas.h"
-#include "imagedev/cassette.h"
-#include "machine/mos6530.h"
-#include "machine/timer.h"
-#include "video/pwm.h"
-
-#include "speaker.h"
-
-#include "kim1.lh"
-
-
-namespace {
-
-//**************************************************************************
-// TYPE DEFINITIONS
-//**************************************************************************
-
-class kim1_state : public driver_device
-{
-public:
- kim1_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_miot(*this, "miot%u", 0)
- , m_digit_pwm(*this, "digit_pwm")
- , m_cass(*this, "cassette")
- , m_row(*this, "ROW%u", 0U)
- , m_special(*this, "SPECIAL")
- { }
-
- DECLARE_INPUT_CHANGED_MEMBER(trigger_reset);
- DECLARE_INPUT_CHANGED_MEMBER(trigger_nmi);
- void kim1(machine_config &config);
-
-private:
- uint8_t kim1_u2_read_a();
- void kim1_u2_write_a(uint8_t data);
- uint8_t kim1_u2_read_b();
- void kim1_u2_write_b(uint8_t data);
-
- // device overrides
- virtual void machine_start() override;
- virtual void machine_reset() override;
-
- TIMER_DEVICE_CALLBACK_MEMBER(kim1_cassette_input);
-
- void mem_map(address_map &map);
-
- // devices
- required_device<cpu_device> m_maincpu;
- required_device_array<mos6530_device, 2> m_miot;
- required_device<pwm_display_device> m_digit_pwm;
- required_device<cassette_image_device> m_cass;
-
- required_ioport_array<3> m_row;
- required_ioport m_special;
-
- uint8_t m_u2_port_b;
- uint8_t m_311_output;
- uint32_t m_cassette_high_count;
-};
-
-
-//**************************************************************************
-// ADDRESS MAPS
-//**************************************************************************
-
-void kim1_state::mem_map(address_map &map)
-{
- map.global_mask(0x1fff);
- map(0x0000, 0x03ff).ram();
- map(0x1700, 0x173f).rw(m_miot[1], FUNC(mos6530_device::read), FUNC(mos6530_device::write));
- map(0x1740, 0x177f).rw(m_miot[0], FUNC(mos6530_device::read), FUNC(mos6530_device::write));
- map(0x1780, 0x17ff).ram();
- map(0x1800, 0x1fff).rom().region("maincpu",0);
-}
-
-INPUT_CHANGED_MEMBER(kim1_state::trigger_reset)
-{
- // RS key input
- m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE);
-}
-
-INPUT_CHANGED_MEMBER(kim1_state::trigger_nmi)
-{
- // ST key input
- m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE);
-}
-
-
-//**************************************************************************
-// INPUT PORTS
-//**************************************************************************
-
-static INPUT_PORTS_START( kim1 )
- PORT_START("ROW0")
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CODE(KEYCODE_0_PAD)
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CODE(KEYCODE_1_PAD)
- PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CODE(KEYCODE_2_PAD)
- PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CODE(KEYCODE_3_PAD)
- PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CODE(KEYCODE_4_PAD)
- PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CODE(KEYCODE_5_PAD)
- PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CODE(KEYCODE_6_PAD)
-
- PORT_START("ROW1")
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CODE(KEYCODE_7_PAD)
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CODE(KEYCODE_8_PAD)
- PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CODE(KEYCODE_9_PAD)
- PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
- PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
- PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
- PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
-
- PORT_START("ROW2")
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
- PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CODE(KEYCODE_MINUS_PAD)
- PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("DA") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=')
- PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^') PORT_CODE(KEYCODE_PLUS_PAD)
- PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_ENTER) PORT_CHAR('X') PORT_CODE(KEYCODE_ENTER_PAD)
- PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("PC") PORT_CODE(KEYCODE_F6)
-
- PORT_START("SPECIAL")
- PORT_BIT( 0x80, 0x00, IPT_UNUSED )
- PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("sw1: ST") PORT_CODE(KEYCODE_F7) PORT_CHANGED_MEMBER(DEVICE_SELF, kim1_state, trigger_nmi, 0) PORT_CHAR('S')
- PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("sw2: RS") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, kim1_state, trigger_reset, 0) PORT_CHAR('N')
- PORT_DIPNAME(0x10, 0x10, "sw3: SS") PORT_CODE(KEYCODE_NUMLOCK) PORT_TOGGLE
- PORT_DIPSETTING( 0x00, "single step")
- PORT_DIPSETTING( 0x10, "run")
- PORT_BIT( 0x08, 0x00, IPT_UNUSED )
- PORT_BIT( 0x04, 0x00, IPT_UNUSED )
- PORT_BIT( 0x02, 0x00, IPT_UNUSED )
- PORT_BIT( 0x01, 0x00, IPT_UNUSED )
-INPUT_PORTS_END
-
-uint8_t kim1_state::kim1_u2_read_a()
-{
- uint8_t data = 0xff;
-
- // Read from keyboard
- offs_t const sel = (m_u2_port_b >> 1) & 0x0f;
- if (3U > sel)
- data = m_row[sel]->read();
-
- return data;
-}
-
-void kim1_state::kim1_u2_write_a(uint8_t data)
-{
- // Write to 7-segment LEDs
- m_digit_pwm->write_mx(data & 0x7f);
-}
-
-uint8_t kim1_state::kim1_u2_read_b()
-{
- if (m_miot[0]->portb_out_get() & 0x20)
- return 0xff;
-
- // Load from cassette
- return 0x7f | (m_311_output ^ 0x80);
-}
-
-void kim1_state::kim1_u2_write_b(uint8_t data)
-{
- m_u2_port_b = data;
-
- // Select 7-segment LED
- m_digit_pwm->write_my(1 << (data >> 1 & 0xf) >> 4);
-
- // Cassette write/speaker update
- if (data & 0x20)
- m_cass->output((data & 0x80) ? -1.0 : 1.0);
-
- // Set IRQ when bit 7 is cleared
-}
-
-TIMER_DEVICE_CALLBACK_MEMBER(kim1_state::kim1_cassette_input)
-{
- double tap_val = m_cass->input();
-
- if (tap_val <= 0)
- {
- if (m_cassette_high_count)
- {
- m_311_output = (m_cassette_high_count < 8) ? 0x80 : 0;
- m_cassette_high_count = 0;
- }
- }
-
- if (tap_val > 0)
- m_cassette_high_count++;
-}
-
-void kim1_state::machine_start()
-{
- // Register for save states
- save_item(NAME(m_u2_port_b));
- save_item(NAME(m_311_output));
- save_item(NAME(m_cassette_high_count));
-}
-
-void kim1_state::machine_reset()
-{
- m_311_output = 0;
- m_cassette_high_count = 0;
-}
-
-
-//**************************************************************************
-// MACHINE DRIVERS
-//**************************************************************************
-
-void kim1_state::kim1(machine_config &config)
-{
- // basic machine hardware
- M6502(config, m_maincpu, 1_MHz_XTAL);
- m_maincpu->set_addrmap(AS_PROGRAM, &kim1_state::mem_map);
-
- // video hardware
- PWM_DISPLAY(config, m_digit_pwm).set_size(6, 7);
- m_digit_pwm->set_segmask(0x3f, 0x7f);
- config.set_default_layout(layout_kim1);
-
- // devices
- MOS6530(config, m_miot[0], 1_MHz_XTAL); // u2
- m_miot[0]->in_pa_callback().set(FUNC(kim1_state::kim1_u2_read_a));
- m_miot[0]->out_pa_callback().set(FUNC(kim1_state::kim1_u2_write_a));
- m_miot[0]->in_pb_callback().set(FUNC(kim1_state::kim1_u2_read_b));
- m_miot[0]->out_pb_callback().set(FUNC(kim1_state::kim1_u2_write_b));
-
- MOS6530(config, m_miot[1], 1_MHz_XTAL); // u3
-
- CASSETTE(config, m_cass);
- m_cass->set_formats(kim1_cassette_formats);
- m_cass->set_default_state(CASSETTE_STOPPED);
- m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
- m_cass->set_interface ("kim1_cass");
-
- SPEAKER(config, "mono").front_center();
-
- TIMER(config, "cassette_timer").configure_periodic(FUNC(kim1_state::kim1_cassette_input), attotime::from_hz(44100));
-
- // software list
- SOFTWARE_LIST(config, "cass_list").set_original("kim1_cass");
-}
-
-
-//**************************************************************************
-// ROM DEFINITIONS
-//**************************************************************************
-
-ROM_START(kim1)
- ROM_REGION(0x0800,"maincpu",0)
- ROM_LOAD("6530-003.bin", 0x0000, 0x0400, CRC(a2a56502) SHA1(60b6e48f35fe4899e29166641bac3e81e3b9d220))
- ROM_LOAD("6530-002.bin", 0x0400, 0x0400, CRC(2b08e923) SHA1(054f7f6989af3a59462ffb0372b6f56f307b5362))
-ROM_END
-
-} // anonymous namespace
-
-
-//**************************************************************************
-// SYSTEM DRIVERS
-//**************************************************************************
-
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 1975, kim1, 0, 0, kim1, kim1, kim1_state, empty_init, "MOS Technologies", "KIM-1", MACHINE_SUPPORTS_SAVE)