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// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/***************************************************************************

        Kosmos CP-1

        06/03/2012 Skeleton driver.

        on board there is also 8155
        KEYBOARD Membrane keyboard, 57 keys
        6 * 7 seg led display

****************************************************************************/

#include "emu.h"
#include "cpu/mcs48/mcs48.h"
#include "machine/i8155.h"
#include "imagedev/cassette.h"
#include "imagedev/snapquik.h"
#include "cp1.lh"

class cp1_state : public driver_device
{
public:
	cp1_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_i8155(*this, "i8155"),
		m_i8155_cp3(*this, "i8155_cp3"),
		m_cassette(*this, "cassette"),
		m_io_lines(*this, "LINE%u", 0U),
		m_io_config(*this, "CONFIG"),
		m_digits(*this, "digit%u", 0U)
	{ }

	void cp1(machine_config &config);
private:
	void cp1_io(address_map &map);

	virtual void machine_start() override;
	virtual void machine_reset() override;

	DECLARE_READ8_MEMBER(port1_r);
	DECLARE_READ8_MEMBER(port2_r);
	DECLARE_WRITE8_MEMBER(port1_w);
	DECLARE_WRITE8_MEMBER(port2_w);
	DECLARE_QUICKLOAD_LOAD_MEMBER(quickload);

	DECLARE_READ8_MEMBER(i8155_read);
	DECLARE_WRITE8_MEMBER(i8155_write);
	DECLARE_WRITE8_MEMBER(i8155_porta_w);
	DECLARE_READ8_MEMBER(i8155_portb_r);
	DECLARE_WRITE8_MEMBER(i8155_portb_w);
	DECLARE_WRITE8_MEMBER(i8155_portc_w);

	required_device<cpu_device> m_maincpu;
	required_device<i8155_device> m_i8155;
	required_device<i8155_device> m_i8155_cp3;
	required_device<cassette_image_device> m_cassette;
	required_ioport_array<5> m_io_lines;
	required_ioport m_io_config;
	output_finder<6> m_digits;

	uint8_t   m_7seg;
	uint8_t   m_port2;
	uint8_t   m_matrix;
};

READ8_MEMBER(cp1_state::port1_r)
{
	logerror("Read from expansion port 1\n");

	uint8_t data = 0;

	if (m_io_config->read() & 0x01)
		data |= (m_cassette->input() > 0.03) ? 0x80 : 0x00;

	return data;
}

WRITE8_MEMBER(cp1_state::port1_w)
{
	logerror("Write to expansion port 1 %x\n", data);

	if (m_io_config->read() & 0x01)
		m_cassette->output(data & 0x80 ? +1.0 : -1.0);
}

READ8_MEMBER(cp1_state::port2_r)
{
	// x--- ----   I8155 IO/M
	// -x-- ----   I8155 RESET
	// --x- ----   expansion port CE
	// ---x ----   I8155 CE
	// ---- xxxx   keyboard input

	uint8_t data = 0;

	for(int i=0; i<5; i++)
		if (!(m_matrix & (1<<i)))
			data |= m_io_lines[i]->read();

	return (data & 0x0f) | (m_port2 & 0xf0);
}

WRITE8_MEMBER(cp1_state::port2_w)
{
	if (data & 0x40)
	{
		m_i8155->reset();

		if (m_io_config->read() & 0x02)
			m_i8155_cp3->reset();
	}

	m_port2 = data;
}

READ8_MEMBER(cp1_state::i8155_read)
{
	uint8_t data = 0;

	if (!(m_port2 & 0x10))
	{
		m_i8155->ale_w(space, BIT(m_port2, 7), offset);
		data |= m_i8155->read(space, offset);
	}
	if ((m_io_config->read() & 0x02) && !(m_port2 & 0x20))
	{
		// CP3 RAM expansion
		m_i8155_cp3->ale_w(space, BIT(m_port2, 7), offset);
		data |= m_i8155_cp3->read(space, offset);
	}

	return data;
}

WRITE8_MEMBER(cp1_state::i8155_write)
{
	if (!(m_port2 & 0x10))
	{
		m_i8155->ale_w(space, BIT(m_port2, 7), offset);
		m_i8155->write(space, offset, data);
	}
	if ((m_io_config->read() & 0x02) && !(m_port2 & 0x20))
	{
		// CP3 RAM expansion
		m_i8155_cp3->ale_w(space, BIT(m_port2, 7), offset);
		m_i8155_cp3->write(space, offset, data);
	}
}

WRITE8_MEMBER(cp1_state::i8155_porta_w)
{
	data &= 0x7f;   // PA7 is not connected

	if (m_7seg)
	{
		if (!(m_matrix & 0x01))     m_digits[5] = data;
		if (!(m_matrix & 0x02))     m_digits[4] = data;
		if (!(m_matrix & 0x04))     m_digits[3] = data;
		if (!(m_matrix & 0x08))     m_digits[2] = data | 0x80;     // this digit has always the dot active
		if (!(m_matrix & 0x10))     m_digits[1] = data;
		if (!(m_matrix & 0x20))     m_digits[0] = data;
	}

	m_7seg ^= 0x01;
}

READ8_MEMBER(cp1_state::i8155_portb_r)
{
	logerror("read from expansion port 2\n");
	return 0;
}

WRITE8_MEMBER(cp1_state::i8155_portb_w)
{
	logerror("Write to expansion port 2 %x\n", data);
}

WRITE8_MEMBER(cp1_state::i8155_portc_w)
{
	// --xx xxxx   keyboard matrix

	m_matrix = data & 0x3f;
}


void cp1_state::cp1_io(address_map &map)
{
	map.unmap_value_high();
	map(0x00, 0xff).rw(FUNC(cp1_state::i8155_read), FUNC(cp1_state::i8155_write));
}

/* Input ports */
INPUT_PORTS_START( cp1 )
	PORT_START("LINE0")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_K)   PORT_NAME("CAS [Cass. speichern]")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_DEL) PORT_NAME("CLR [Irrtum]")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_C)   PORT_NAME("PC [Programmzahler]")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_A)   PORT_NAME("ACC [Akku]")
	PORT_START("LINE1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_L)   PORT_NAME("CAL [Cass. lesen]")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_S)   PORT_NAME("STEP [Schritt]")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_B)   PORT_NAME("STP [Stopp]")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R)   PORT_NAME("RUN [Lauf]")
	PORT_START("LINE2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_8)   PORT_NAME("8")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_9)   PORT_NAME("9")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_O)   PORT_NAME("OUT [Auslesen]")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_I)   PORT_NAME("INP [Eingeben]")
	PORT_START("LINE3")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4)   PORT_NAME("4")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5)   PORT_NAME("5")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6)   PORT_NAME("6")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_7)   PORT_NAME("7")
	PORT_START("LINE4")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_0)   PORT_NAME("0")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1)   PORT_NAME("1")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2)   PORT_NAME("2")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3)   PORT_NAME("3")

	PORT_START("CONFIG")
	PORT_CONFNAME( 0x01, 0x01, "CP2 Cassette Interface" )
	PORT_CONFSETTING( 0x00, DEF_STR( No ) )
	PORT_CONFSETTING( 0x01, DEF_STR( Yes ) )
	PORT_CONFNAME( 0x02, 0x00, "CP3 RAM Expansion" )
	PORT_CONFSETTING( 0x00, DEF_STR( No ) )
	PORT_CONFSETTING( 0x02, DEF_STR( Yes ) )
INPUT_PORTS_END

void cp1_state::machine_start()
{
	m_digits.resolve();
}

void cp1_state::machine_reset()
{
	m_port2 = 0;
	m_matrix = 0;
	m_7seg = 0;
	m_cassette->change_state(CASSETTE_STOPPED, CASSETTE_MASK_UISTATE);
}

QUICKLOAD_LOAD_MEMBER( cp1_state, quickload )
{
	address_space &space = machine().dummy_space();
	char line[0x10];
	int addr = 0;
	while (image.fgets(line, 10) && addr < 0x100)
	{
		int op = 0, arg = 0;
		if (sscanf(line, "%d.%d", &op, &arg) == 2)
		{
			m_i8155->memory_w(space, addr++, op);
			m_i8155->memory_w(space, addr++, arg);
		}
		else
		{
			return image_init_result::FAIL;
		}
	}

	return image_init_result::PASS;
}

MACHINE_CONFIG_START(cp1_state::cp1)
	/* basic machine hardware */
	i8049_device &maincpu(I8049(config, m_maincpu, 6_MHz_XTAL));
	maincpu.set_addrmap(AS_IO, &cp1_state::cp1_io);
	maincpu.p1_in_cb().set(FUNC(cp1_state::port1_r));
	maincpu.p1_out_cb().set(FUNC(cp1_state::port1_w));
	maincpu.p2_in_cb().set(FUNC(cp1_state::port2_r));
	maincpu.p2_out_cb().set(FUNC(cp1_state::port2_w));
	maincpu.bus_in_cb().set_log("getbus");
	maincpu.bus_out_cb().set_log("putbus");
	maincpu.t0_in_cb().set_log("t0_r");
	maincpu.t1_in_cb().set_log("t1_r");

	i8155_device &i8155(I8155(config, "i8155", 0));
	i8155.out_pa_callback().set(FUNC(cp1_state::i8155_porta_w));
	i8155.in_pb_callback().set(FUNC(cp1_state::i8155_portb_r));
	i8155.out_pb_callback().set(FUNC(cp1_state::i8155_portb_w));
	i8155.out_pc_callback().set(FUNC(cp1_state::i8155_portc_w));

	I8155(config, "i8155_cp3", 0);

	config.set_default_layout(layout_cp1);

	MCFG_CASSETTE_ADD("cassette")

	MCFG_QUICKLOAD_ADD("quickload", cp1_state, quickload, "obj", 1)
MACHINE_CONFIG_END

/* ROM definition */
/*
  KOSMOS B
  <Mitsubishi Logo> M5L8049-136P-6
  JAPAN 83F301
*/

ROM_START( cp1 )
	ROM_REGION( 0x0800, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS( 0, "b", "b" )
	ROMX_LOAD( "cp1-kosmos-b.rom", 0x0000, 0x0800, CRC(fea8a2b2) SHA1(c987b79a7b90fcbd58b66a69e95913f2655a1f0d), ROM_BIOS(0))
	// This is from 2716 eprom that was on board with I8039 instead of I8049
	ROM_SYSTEM_BIOS( 1, "2716", "2716" )
	ROMX_LOAD( "cp1-2716.bin",     0x0000, 0x0800, CRC(3a2caf0e) SHA1(ff4befcf82a664950186d3af1843fdef70d2209f), ROM_BIOS(1))
ROM_END

/* Driver */

//    YEAR  NAME  PARENT  COMPAT  MACHINE  INPUT  CLASS      INIT        COMPANY   FULLNAME                 FLAGS
COMP( 1980, cp1,  0,      0,      cp1,     cp1,   cp1_state, empty_init, "Kosmos", "CP1 / Computer Praxis", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )