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+// license:BSD-3-Clause
+// copyright-holders:hap
+// thanks-to:Sean Riddle
+/******************************************************************************
+
+Lexicon LK-3000, a pocket computer.
+It was also licensed to Nixdorf.
+
+Hardware notes:
+- 3870 MCU (Motorola brand) @ 4MHz(2MHz internal)
+- optional external ROM or RAM
+- 4*Litronix DL 1414 (16*17segs total)
+- 33-button keypad
+
+The CPU and memory is on the cartridge. In theory, any hardware configuration
+is possible, but it looks like they always used a 3870.
+
+cartridge types known:
+- CPU + 4/8KB ROM (ROM may be unpopulated)
+- CPU + 2*4KB ROM
+- CPU + 1KB battery-backed RAM (2*NEC D444)
+
+TODO:
+- external rom access doesn't work ("german" locks up)
+- external ram should be battery-backed
+
+******************************************************************************/
+
+#include "emu.h"
+
+#include "bus/generic/carts.h"
+#include "bus/generic/slot.h"
+#include "cpu/f8/f8.h"
+#include "machine/f3853.h"
+#include "video/dl1416.h"
+
+// internal artwork
+#include "lk3000.lh"
+
+
+namespace {
+
+class lk3000_state : public driver_device
+{
+public:
+ lk3000_state(const machine_config &mconfig, device_type type, const char *tag) :
+ driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_dl1414(*this, "dl1414_%u", 0),
+ m_cart(*this, "cartslot"),
+ m_inputs(*this, "IN.%u", 0),
+ m_digits(*this, "digit%u", 0U)
+ { }
+
+ void lk3000(machine_config &config);
+
+ // CLR button is tied to MCU RESET pin
+ DECLARE_INPUT_CHANGED_MEMBER(reset_button) { m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); }
+
+protected:
+ virtual void machine_start() override;
+
+private:
+ // devices/pointers
+ required_device<cpu_device> m_maincpu;
+ required_device_array<dl1414_device, 4> m_dl1414;
+ required_device<generic_slot_device> m_cart;
+ required_ioport_array<8> m_inputs;
+ output_finder<16> m_digits;
+
+ void main_map(address_map &map);
+ void main_io(address_map &map);
+
+ DECLARE_DEVICE_IMAGE_LOAD_MEMBER(cart_load);
+ template <int N> void update_display(offs_t offset, u16 data);
+
+ u8 p0_r();
+ void p0_w(u8 data);
+ u8 p1_r();
+ void p1_w(u8 data);
+ u8 p4_r();
+ void p4_w(u8 data);
+ u8 p5_r();
+ void p5_w(u8 data);
+
+ u8 m_p0 = 0;
+ u8 m_p1 = 0;
+ u8 m_p4 = 0;
+ u8 m_p5 = 0;
+
+ bool m_has_ram = false;
+ u8 m_ram[0x400];
+};
+
+void lk3000_state::machine_start()
+{
+ m_digits.resolve();
+ memset(m_ram, 0xff, 0x400);
+
+ // register for savestates
+ save_item(NAME(m_p0));
+ save_item(NAME(m_p1));
+ save_item(NAME(m_p4));
+ save_item(NAME(m_p5));
+ save_item(NAME(m_has_ram));
+ save_item(NAME(m_ram));
+}
+
+
+
+/******************************************************************************
+ I/O
+******************************************************************************/
+
+// misc
+
+DEVICE_IMAGE_LOAD_MEMBER(lk3000_state::cart_load)
+{
+ u32 size = m_cart->common_get_size("rom");
+ m_cart->rom_alloc(size, GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE);
+ m_cart->common_load_rom(m_cart->get_rom_base(), size, "rom");
+
+ // extra ram (optional)
+ m_has_ram = image.get_feature("ram") != nullptr;
+
+ return image_init_result::PASS;
+}
+
+template <int N>
+void lk3000_state::update_display(offs_t offset, u16 data)
+{
+ m_digits[N * 4 + offset] = data;
+}
+
+
+// 3870 ports
+
+u8 lk3000_state::p0_r()
+{
+ return m_p0;
+}
+
+void lk3000_state::p0_w(u8 data)
+{
+ m_p0 = data;
+}
+
+u8 lk3000_state::p1_r()
+{
+ u8 data = m_p1;
+
+ // P10-P13: multiplexed inputs
+ if (m_p4 & 0x10)
+ data |= m_inputs[~m_p4 & 7]->read();
+
+ // read rom data
+ if (m_p5 & 0x20)
+ {
+ // P00-P06: A0-A6, P50-P54: A7-A11, P07 selects chip
+ u16 offset = (m_p0 & 0x7f) | (m_p5 << 7 & 0xf80) | (m_p0 << 5 & 0x1000);
+ data |= m_cart->read_rom(offset + 0x800);
+ }
+
+ // read ram data
+ if (m_has_ram && m_p4 & 0xc0)
+ {
+ u16 offset = (m_p0 & 0xff) | (m_p5 << 8 & 0x300);
+ data |= m_ram[offset];
+ }
+
+ return data;
+}
+
+void lk3000_state::p1_w(u8 data)
+{
+ // P10-P15,_P15: DL1414 data
+ for (int i = 0; i < 4; i++)
+ m_dl1414[i]->data_w((~data & 0x3f) | (data << 1 & 0x40));
+
+ m_p1 = data;
+}
+
+u8 lk3000_state::p4_r()
+{
+ return m_p4;
+}
+
+void lk3000_state::p4_w(u8 data)
+{
+ // P40,P41: DL1414 address
+ for (int i = 0; i < 4; i++)
+ m_dl1414[i]->addr_w(~data & 3);
+
+ // P42,P43,GND,P45: 7442 to DL1414 _WR
+ for (int i = 0; i < 4; i++)
+ m_dl1414[i]->wr_w(BIT(1 << (~data >> 2 & 0xb), i));
+
+ // P46: write ram data
+ if (m_has_ram && ~data & m_p4 & 0x40)
+ {
+ u16 offset = (m_p0 & 0xff) | (m_p5 << 8 & 0x300);
+ m_ram[offset] = m_p1;
+ }
+
+ // P40,P41,P42,P44: 7442 to keypad mux
+ m_p4 = data;
+}
+
+u8 lk3000_state::p5_r()
+{
+ return m_p5;
+}
+
+void lk3000_state::p5_w(u8 data)
+{
+ m_p5 = data;
+}
+
+
+
+/******************************************************************************
+ Address Maps
+******************************************************************************/
+
+void lk3000_state::main_map(address_map &map)
+{
+ map.global_mask(0x7ff);
+ map(0x0000, 0x07ff).r("cartslot", FUNC(generic_slot_device::read_rom));
+}
+
+void lk3000_state::main_io(address_map &map)
+{
+ map(0x00, 0x00).rw(FUNC(lk3000_state::p0_r), FUNC(lk3000_state::p0_w));
+ map(0x01, 0x01).rw(FUNC(lk3000_state::p1_r), FUNC(lk3000_state::p1_w));
+ map(0x04, 0x07).rw("psu", FUNC(f38t56_device::read), FUNC(f38t56_device::write));
+}
+
+
+
+/******************************************************************************
+ Input Ports
+******************************************************************************/
+
+static INPUT_PORTS_START( lk3000 )
+ PORT_START("IN.0")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_NAME("A / MET")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_NAME("B / US")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_NAME("C / X>M")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_NAME("D / K")
+
+ PORT_START("IN.1")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_NAME("J / C1")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_NAME("K / C2")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_NAME("L / RM")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_NAME("M / %")
+
+ PORT_START("IN.2")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_NAME("S / EXC")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_NAME("T / +/-")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_NAME("U / M+")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CODE(KEYCODE_0) PORT_CODE(KEYCODE_0_PAD) PORT_NAME("V / 0")
+
+ PORT_START("IN.3")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD) PORT_CHAR('e') PORT_NAME("E / 7")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD) PORT_CHAR('f') PORT_NAME("F / 8")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_9) PORT_CODE(KEYCODE_9_PAD) PORT_CHAR('g') PORT_NAME("G / 9")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CODE(KEYCODE_SLASH_PAD) PORT_CHAR('h') PORT_NAME(u8"H / ÷")
+
+ PORT_START("IN.4")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_CHAR('n') PORT_NAME("N / 4")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_CHAR('o') PORT_NAME("O / 5")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_CHAR('p') PORT_NAME("P / 6")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CODE(KEYCODE_PLUS_PAD) PORT_CHAR('q') PORT_NAME("Q / +")
+
+ PORT_START("IN.5")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_CHAR('w') PORT_NAME("W / 1")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_CHAR('x') PORT_NAME("X / 2")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_CHAR('y') PORT_NAME("Y / 3")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CODE(KEYCODE_STOP) PORT_CODE(KEYCODE_DEL_PAD) PORT_CHAR('z') PORT_NAME("Z / .")
+
+ PORT_START("IN.6")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('?') PORT_NAME("? / P2")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) PORT_NAME("bs / P1")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CODE(KEYCODE_MINUS_PAD) PORT_CHAR('r') PORT_NAME("R / -")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CODE(KEYCODE_ASTERISK) PORT_CHAR('i') PORT_NAME(u8"I / ×")
+
+ PORT_START("IN.7")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) PORT_NAME("def / P4")
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t') PORT_NAME("stp / P3")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(' ') PORT_NAME("sp / =")
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(F1)) PORT_NAME("f")
+
+ PORT_START("RESET")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_DEL) PORT_CHANGED_MEMBER(DEVICE_SELF, lk3000_state, reset_button, 0) PORT_CHAR(127) PORT_NAME("clr")
+INPUT_PORTS_END
+
+
+
+/******************************************************************************
+ Machine Configs
+******************************************************************************/
+
+void lk3000_state::lk3000(machine_config &config)
+{
+ // basic machine hardware
+ F8(config, m_maincpu, 4_MHz_XTAL/2);
+ m_maincpu->set_addrmap(AS_PROGRAM, &lk3000_state::main_map);
+ m_maincpu->set_addrmap(AS_IO, &lk3000_state::main_io);
+ m_maincpu->set_irq_acknowledge_callback("psu", FUNC(f38t56_device::int_acknowledge));
+
+ auto &psu(F38T56(config, "psu", 4_MHz_XTAL/2));
+ psu.set_int_vector(0x20);
+ psu.int_req_callback().set_inputline("maincpu", F8_INPUT_LINE_INT_REQ);
+ psu.read_a().set(FUNC(lk3000_state::p4_r));
+ psu.write_a().set(FUNC(lk3000_state::p4_w));
+ psu.read_b().set(FUNC(lk3000_state::p5_r));
+ psu.write_b().set(FUNC(lk3000_state::p5_w));
+
+ // video hardware
+ DL1414T(config, m_dl1414[0], u32(0)).update().set(FUNC(lk3000_state::update_display<0>));
+ DL1414T(config, m_dl1414[1], u32(0)).update().set(FUNC(lk3000_state::update_display<1>));
+ DL1414T(config, m_dl1414[2], u32(0)).update().set(FUNC(lk3000_state::update_display<2>));
+ DL1414T(config, m_dl1414[3], u32(0)).update().set(FUNC(lk3000_state::update_display<3>));
+ config.set_default_layout(layout_lk3000);
+
+ // cartridge
+ GENERIC_CARTSLOT(config, m_cart, generic_plain_slot, "lk3000");
+ m_cart->set_device_load(FUNC(lk3000_state::cart_load));
+ m_cart->set_must_be_loaded(true);
+
+ SOFTWARE_LIST(config, "cart_list").set_original("lk3000");
+}
+
+
+
+/******************************************************************************
+ ROM Definitions
+******************************************************************************/
+
+ROM_START( lk3000 )
+ ROM_REGION( 0x0800, "maincpu", ROMREGION_ERASE00 )
+ // none here, it's in the module slot
+ROM_END
+
+} // anonymous namespace
+
+
+
+/******************************************************************************
+ Drivers
+******************************************************************************/
+
+// YEAR NAME PARENT COMP MACHINE INPUT STATE INIT COMPANY, FULLNAME, FLAGS
+CONS( 1979, lk3000, 0, 0, lk3000, lk3000, lk3000_state, empty_init, "Lexicon", "LK-3000", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW | MACHINE_SUPPORTS_SAVE )