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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/***************************************************************************
+
+C-80 Trainer (East Germany)
+
+Pasting:
+ 0-F : as is
+ + (inc) : ^
+ - (dec) : V
+ M : -
+ GO : X
+
+Test Paste:
+ -800^11^22^33^44^55^66^77^88^99^-800
+ Now press up-arrow to confirm the data has been entered.
+
+Commands:
+ R : REGister
+ M : MEMory manipulation
+ G : GO
+ F10 : RESet
+ ESC : BRK
+
+Functions (press F1 then the indicated number):
+ 0 : FILL
+ 1 : SAVE
+ 2 : LOAD
+ 3 : LOADP
+ 4 : MOVE
+ 5 : IN
+ 6 : OUT
+
+When REG is chosen, use UP to scroll through the list of regs,
+or press 0 thru C to choose one directly:
+ 0 : SP
+ 1 : PC
+ 2 : AF
+ 3 : BC
+ 4 : DE
+ 5 : HL
+ 6 : AF'
+ 7 : BC'
+ 8 : DE'
+ 9 : HL'
+ A : IFF
+ B : IX
+ C : IY
+
+When MEM is chosen, enter the address, press UP, enter data, press UP, enter
+data of next byte, and so on.
+
+Cassette SAVE: Press F1 1 aaaa DOWN bbbb UP
+Cassette LOAD: Press F1 2 aaaa DOWN bbbb UP
+(where aaaa = 4-digit beginning address, bbbb = 4-digit ending address)
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "machine/z80daisy.h"
+#include "machine/z80pio.h"
+#include "imagedev/cassette.h"
+#include "speaker.h"
+#include "c80.lh"
+
+namespace {
+
+#define Z80_TAG "d2"
+#define Z80PIO1_TAG "d11"
+#define Z80PIO2_TAG "d12"
+// You could use a piezo at 455 kHz, or a crystal 500 to 2500 kHz.
+// Cassette successfully tested at 455 kHz
+#define MASTER_CLOCK 455000
+
+class c80_state : public driver_device
+{
+public:
+ c80_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag)
+ , m_maincpu(*this, Z80_TAG)
+ , m_pio1(*this, Z80PIO1_TAG)
+ , m_pio2(*this, Z80PIO2_TAG)
+ , m_cassette(*this, "cassette")
+ , m_row0(*this, "ROW0")
+ , m_row1(*this, "ROW1")
+ , m_row2(*this, "ROW2")
+ , m_digits(*this, "digit%d", 0U)
+ { }
+
+ DECLARE_INPUT_CHANGED_MEMBER( trigger_reset );
+ DECLARE_INPUT_CHANGED_MEMBER( trigger_nmi );
+ void c80(machine_config &config);
+
+private:
+ required_device<z80_device> m_maincpu;
+ required_device<z80pio_device> m_pio1;
+ required_device<z80pio_device> m_pio2;
+ required_device<cassette_image_device> m_cassette;
+ required_ioport m_row0;
+ required_ioport m_row1;
+ required_ioport m_row2;
+ output_finder<8> m_digits;
+
+ virtual void machine_start() override ATTR_COLD;
+
+ uint8_t pio1_pa_r();
+ void pio1_pa_w(uint8_t data);
+ void pio1_pb_w(uint8_t data);
+ void pio1_brdy_w(int state);
+
+ /* keyboard state */
+ u8 m_keylatch = 0;
+
+ /* display state */
+ u8 m_digit = 0;
+ bool m_pio1_a5 = false;
+ u8 m_pio1_brdy = 0;
+ void c80_io(address_map &map) ATTR_COLD;
+ void c80_mem(address_map &map) ATTR_COLD;
+};
+
+
+/* Memory Maps */
+
+void c80_state::c80_mem(address_map &map)
+{
+ map.unmap_value_high();
+ map(0x0000, 0x07ff).rom();
+ map(0x0800, 0x0bff).mirror(0x400).ram();
+}
+
+void c80_state::c80_io(address_map &map)
+{
+ map.global_mask(0xff);
+ map.unmap_value_high();
+ map(0x7c, 0x7f).rw(m_pio2, FUNC(z80pio_device::read), FUNC(z80pio_device::write));
+ map(0xbc, 0xbf).rw(m_pio1, FUNC(z80pio_device::read), FUNC(z80pio_device::write));
+}
+
+/* Input Ports */
+
+INPUT_CHANGED_MEMBER( c80_state::trigger_reset )
+{
+ m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE);
+}
+
+INPUT_CHANGED_MEMBER( c80_state::trigger_nmi )
+{
+ m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE);
+}
+
+static INPUT_PORTS_START( c80 )
+ PORT_START("ROW0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("REG") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FCN") PORT_CODE(KEYCODE_F1)
+
+ PORT_START("ROW1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("-") PORT_CODE(KEYCODE_DOWN) PORT_CHAR('V')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+
+ PORT_START("ROW2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("MEM") PORT_CODE(KEYCODE_M) PORT_CHAR('-')
+
+ PORT_START("SPECIAL")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RES") PORT_CODE(KEYCODE_F10) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(c80_state::trigger_reset), 0)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BRK") PORT_CODE(KEYCODE_ESC) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(c80_state::trigger_nmi), 0)
+INPUT_PORTS_END
+
+/* Z80-PIO Interface */
+
+uint8_t c80_state::pio1_pa_r()
+{
+ /*
+
+ bit description
+
+ PA0 keyboard row 0 input
+ PA1 keyboard row 1 input
+ PA2 keyboard row 2 input
+ PA3
+ PA4 _BSTB input
+ PA5 display enable output (0=enabled, 1=disabled)
+ PA6 tape output
+ PA7 tape input
+
+ */
+
+ uint8_t data = m_pio1_brdy | 0x07;
+
+ for (u8 i = 0; i < 8; i++)
+ {
+ if (!BIT(m_keylatch, i))
+ {
+ if (!BIT(m_row0->read(), i)) data &= ~0x01;
+ if (!BIT(m_row1->read(), i)) data &= ~0x02;
+ if (!BIT(m_row2->read(), i)) data &= ~0x04;
+ }
+ }
+
+ data |= (m_cassette->input() < +0.0) << 7;
+
+ return data;
+}
+
+void c80_state::pio1_pa_w(uint8_t data)
+{
+ /*
+
+ bit description
+
+ PA0 keyboard row 0 input
+ PA1 keyboard row 1 input
+ PA2 keyboard row 2 input
+ PA3
+ PA4 _BSTB input
+ PA5 display enable output (0=enabled, 1=disabled)
+ PA6 tape output
+ PA7 tape input
+
+ */
+
+ m_pio1_a5 = BIT(data, 5);
+
+ if (!BIT(data, 5))
+ {
+ m_digit = 0;
+ }
+
+ m_cassette->output(BIT(data, 6) ? +1.0 : -1.0);
+}
+
+void c80_state::pio1_pb_w(uint8_t data)
+{
+ /*
+
+ bit description
+
+ PB0 VQD30 segment A
+ PB1 VQD30 segment B
+ PB2 VQD30 segment C
+ PB3 VQD30 segment D
+ PB4 VQD30 segment E
+ PB5 VQD30 segment F
+ PB6 VQD30 segment G
+ PB7 VQD30 segment P
+
+ */
+
+ if (!m_pio1_a5 && (m_digit < 8))
+ {
+ m_digits[m_digit] = data;
+ }
+
+ m_keylatch = data;
+}
+
+void c80_state::pio1_brdy_w(int state)
+{
+ m_pio1_brdy = state ? 0 : 0x10;
+
+ if (state)
+ {
+ if (!m_pio1_a5)
+ {
+ m_digit++;
+ }
+
+ m_pio1->strobe_b(1);
+ m_pio1->strobe_b(0);
+ }
+}
+
+/* Z80 Daisy Chain */
+
+static const z80_daisy_config c80_daisy_chain[] =
+{
+ { Z80PIO1_TAG },
+ { Z80PIO2_TAG },
+ { nullptr }
+};
+
+/* Machine Initialization */
+
+void c80_state::machine_start()
+{
+ m_digits.resolve();
+ /* register for state saving */
+ save_item(NAME(m_keylatch));
+ save_item(NAME(m_digit));
+ save_item(NAME(m_pio1_a5));
+ save_item(NAME(m_pio1_brdy));
+}
+
+/* Machine Driver */
+
+void c80_state::c80(machine_config &config)
+{
+ // CPU
+ Z80(config, m_maincpu, MASTER_CLOCK); // U880D
+ m_maincpu->set_addrmap(AS_PROGRAM, &c80_state::c80_mem);
+ m_maincpu->set_addrmap(AS_IO, &c80_state::c80_io);
+ m_maincpu->set_daisy_config(c80_daisy_chain);
+
+ // video
+ config.set_default_layout(layout_c80);
+
+ // devices
+ Z80PIO(config, m_pio1, MASTER_CLOCK); // U855D
+ m_pio1->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
+ m_pio1->in_pa_callback().set(FUNC(c80_state::pio1_pa_r));
+ m_pio1->out_pa_callback().set(FUNC(c80_state::pio1_pa_w));
+ m_pio1->out_pb_callback().set(FUNC(c80_state::pio1_pb_w));
+ m_pio1->out_brdy_callback().set(FUNC(c80_state::pio1_brdy_w));
+
+ Z80PIO(config, m_pio2, MASTER_CLOCK); // U855D
+ m_pio2->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
+
+ // cassette
+ SPEAKER(config, "mono").front_center();
+ CASSETTE(config, m_cassette);
+ m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
+ m_cassette->add_route(ALL_OUTPUTS, "mono", 0.05);
+}
+
+/* ROMs */
+
+ROM_START( c80 )
+ ROM_REGION( 0x0800, Z80_TAG, ROMREGION_ERASEFF )
+ ROM_LOAD( "c80.d3", 0x0000, 0x0400, CRC(ad2b3296) SHA1(14f72cb73a4068b7a5d763cc0e254639c251ce2e) )
+ROM_END
+
+} // Anonymous namespace
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
+COMP( 1986, c80, 0, 0, c80, c80, c80_state, empty_init, "Joachim Czepa", "C-80", MACHINE_SUPPORTS_SAVE )