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// license:MAME
// copyright-holders:Miodrag Milanovic, Robbbert
/***************************************************************************



NEC TK80 / MIKROLAB KR580IK80
*****************************
TK80 driver by Robbbert
Mikrolab driver by Micko
Merged by Robbbert.

TK80 (Training Kit 80) considered to be Japan's first home computer.
It consisted of 25 keys and 8 LED digits, and was programmed in hex.
The Mikrolab is a Russian clone which appears to be almost completely identical.

TK85 seems to be the same as TK80, except is has a larger ROM. No
schematics etc are available. Thanks to 'Nama' who dumped the rom.
It has 25 keys, so a few aren't defined yet.

ND-80Z : http://www.alles.or.jp/~thisida/nd80z3syokai.html (newer version)
Like the TK85, it has a 2KB rom. Thanks again to 'Nama' who dumped it.

When booted, the system begins at 0000 which is ROM. You need to change the
address to 8000 before entering a program. Here is a test to paste in:
8000-11^22^33^44^55^66^77^88^99^8000-
Press the right-arrow to confirm data has been entered.

Operation:
4 digits at left is the address; 2 digits at right is the data.
As you increment addresses, the middle 2 digits show the previous byte.
You can enter 4 digits, and pressing 'ADRS SET' will transfer this info
to the left, thus setting the address to this value. Press 'WRITE INCR' to
store new data and increment the address. Press 'READ INCR' and 'READ DECR'
to scan through data without updating it. Other keys unknown/not implemented.

ToDo:
- Add storage



ICS8080
- Keys labels are correct, but which key is which is not known
- Character B is corrupt
- Operation is different to the other systems

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

#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/i8255.h"
#include "machine/keyboard.h"
#include "tk80.lh"


class tk80_state : public driver_device
{
public:
	tk80_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "maincpu")
	{ }

	DECLARE_READ8_MEMBER(key_matrix_r);
	DECLARE_READ8_MEMBER(nd80z_key_r);
	DECLARE_READ8_MEMBER(serial_r);
	DECLARE_WRITE8_MEMBER(serial_w);
	DECLARE_WRITE8_MEMBER(mikrolab_serial_w);
	DECLARE_READ8_MEMBER(display_r);
	DECLARE_WRITE8_MEMBER(display_w);
	UINT8 m_term_data;
	UINT8 m_keyb_press;
	UINT8 m_keyb_press_flag;
	UINT8 m_shift_press_flag;
	UINT8 m_ppi_portc;
	required_device<cpu_device> m_maincpu;
};


READ8_MEMBER( tk80_state::display_r )
{
	return output_get_digit_value(offset);
}

WRITE8_MEMBER( tk80_state::display_w )
{
	output_set_digit_value(offset, data);
}

static ADDRESS_MAP_START(tk80_mem, AS_PROGRAM, 8, tk80_state)
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0x83ff) // A10-14 not connected
	AM_RANGE(0x0000, 0x02ff) AM_ROM
	AM_RANGE(0x0300, 0x03ff) AM_RAM // EEPROM
	AM_RANGE(0x8000, 0x83f7) AM_RAM // RAM
	AM_RANGE(0x83f8, 0x83ff) AM_RAM AM_READWRITE(display_r,display_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START(tk85_mem, AS_PROGRAM, 8, tk80_state)
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0x87ff) // A10-14 not connected
	AM_RANGE(0x0000, 0x07ff) AM_ROM
	AM_RANGE(0x8000, 0x83f7) AM_RAM
	AM_RANGE(0x83f8, 0x83ff) AM_RAM AM_READWRITE(display_r,display_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START(ics8080_mem, AS_PROGRAM, 8, tk80_state)
	ADDRESS_MAP_UNMAP_HIGH
	//ADDRESS_MAP_GLOBAL_MASK(0x87ff) // A10-14 not connected
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x8000, 0x83f7) AM_RAM
	AM_RANGE(0x83f8, 0x83ff) AM_RAM AM_READWRITE(display_r,display_w)
	AM_RANGE(0x8400, 0x8fff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START(tk80_io, AS_IO, 8, tk80_state)
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0x03)
	AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("ppi8255", i8255_device, read, write)
ADDRESS_MAP_END

static ADDRESS_MAP_START(mikrolab_io, AS_IO, 8, tk80_state)
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0x03)
	AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("ppi8255", i8255_device, read, write)
ADDRESS_MAP_END

static ADDRESS_MAP_START(nd80z_io, AS_IO, 8, tk80_state)
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0x03)
	AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("ppi8255", i8255_device, read, write)
ADDRESS_MAP_END

/* Input ports */
static INPUT_PORTS_START( tk80 )
	PORT_START("X0") /* KEY ROW 0 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7')

	PORT_START("X1") /* KEY ROW 1 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')

	PORT_START("X2") /* KEY ROW 2 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RUN") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RET") PORT_CODE(KEYCODE_W)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ADRS SET") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("READ DECR") PORT_CODE(KEYCODE_LEFT)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("READ INCR") PORT_CODE(KEYCODE_RIGHT)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("WRITE INCR") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("STORE DATA") PORT_CODE(KEYCODE_I)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LOAD DATA") PORT_CODE(KEYCODE_O)
INPUT_PORTS_END

INPUT_PORTS_START( mikrolab )
	PORT_INCLUDE( tk80 )
	PORT_MODIFY("X2")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RUN") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RESUME") PORT_CODE(KEYCODE_W)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ADDRESS") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("-") PORT_CODE(KEYCODE_LEFT)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("+") PORT_CODE(KEYCODE_RIGHT)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("SAVE") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("END") PORT_CODE(KEYCODE_I)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ENTER") PORT_CODE(KEYCODE_O)
INPUT_PORTS_END

INPUT_PORTS_START( ics8080 )
	PORT_INCLUDE( tk80 )
	PORT_MODIFY("X2")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ADDR") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("MEM") PORT_CODE(KEYCODE_T)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BRK") PORT_CODE(KEYCODE_Y)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CLR") PORT_CODE(KEYCODE_U)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("STEP") PORT_CODE(KEYCODE_I)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("NEXT") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("REG") PORT_CODE(KEYCODE_R)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RUN") PORT_CODE(KEYCODE_O)
INPUT_PORTS_END

READ8_MEMBER( tk80_state::key_matrix_r )
{
// PA0-7 keyscan in

	UINT8 data = 0xff;

	if (BIT(m_ppi_portc, 4))
		data &= ioport("X0")->read();
	if (BIT(m_ppi_portc, 5))
		data &= ioport("X1")->read();
	if (BIT(m_ppi_portc, 6))
		data &= ioport("X2")->read();

	return data;
}

READ8_MEMBER( tk80_state::nd80z_key_r )
{
// PA0-7 keyscan in

	UINT8 data = 0xff, row = m_ppi_portc & 7;
	if (row == 6)
		data &= ioport("X0")->read();
	else
	if (row == 5)
		data &= ioport("X1")->read();
	else
	if (row == 3)
		data &= ioport("X2")->read();

	return data;
}

READ8_MEMBER( tk80_state::serial_r )
{
// PB0 - serial in
	//printf("B R\n");

	return 0;
}

WRITE8_MEMBER( tk80_state::serial_w )
{
// PC0 - serial out
// PC4-6 keyscan out
// PC7 - display on/off
	m_ppi_portc = data ^ 0x70;
}

WRITE8_MEMBER( tk80_state::mikrolab_serial_w )
{
// PC0 - serial out
// PC4-6 keyscan out
// PC7 - display on/off
	m_ppi_portc = data;
}

static MACHINE_CONFIG_START( tk80, tk80_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu",I8080, XTAL_1MHz) // 18.432 / 9
	MCFG_CPU_PROGRAM_MAP(tk80_mem)
	MCFG_CPU_IO_MAP(tk80_io)

	/* video hardware */
	MCFG_DEFAULT_LAYOUT(layout_tk80)

	/* Devices */
	MCFG_DEVICE_ADD("ppi8255", I8255, 0)
	MCFG_I8255_IN_PORTA_CB(READ8(tk80_state, key_matrix_r))
	MCFG_I8255_IN_PORTB_CB(READ8(tk80_state, serial_r))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(tk80_state, serial_w))
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( mikrolab, tk80 )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(tk85_mem)
	MCFG_CPU_IO_MAP(mikrolab_io)

	/* Devices */
	MCFG_DEVICE_REMOVE("ppi8255")
	MCFG_DEVICE_ADD("ppi8255", I8255, 0)
	MCFG_I8255_IN_PORTA_CB(READ8(tk80_state, key_matrix_r))
	MCFG_I8255_IN_PORTB_CB(READ8(tk80_state, serial_r))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(tk80_state, mikrolab_serial_w))
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( nd80z, tk80 )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(tk85_mem)
	MCFG_CPU_IO_MAP(nd80z_io)

	/* Devices */
	MCFG_DEVICE_REMOVE("ppi8255")
	MCFG_DEVICE_ADD("ppi8255", I8255, 0)
	MCFG_I8255_IN_PORTA_CB(READ8(tk80_state, nd80z_key_r))
	MCFG_I8255_IN_PORTB_CB(READ8(tk80_state, serial_r))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(tk80_state, mikrolab_serial_w))
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( tk85, tk80 )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(tk85_mem)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( ics8080, tk80 )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(ics8080_mem)
MACHINE_CONFIG_END


/* ROM definition */
ROM_START( tk80 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "tk80-1.bin", 0x0000, 0x0100, CRC(897295e4) SHA1(50fb42b07252fc48044830e2f228e218fc59481c))
	ROM_LOAD( "tk80-2.bin", 0x0100, 0x0100, CRC(d54480c3) SHA1(354962aca1710ac75b40c8c23a6c303938f9d596))
	ROM_LOAD( "tk80-3.bin", 0x0200, 0x0100, CRC(8d4b02ef) SHA1(2b5a1ee8f97db23ffec48b96f12986461024c995))
ROM_END

ROM_START( ics8080 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "amtsmnonv27.rom1", 0x0000, 0x0800, CRC(82d40dc5) SHA1(9215457101c3b9b8706dbebe902196494993a282) )
	ROM_LOAD( "thmcplv11.rom2",   0x0800, 0x0800, CRC(51784f70) SHA1(c05c75d566c4ff8f681eba29cd48e72b95be89e0) )
	ROM_LOAD( "tunev08.rom3",     0x1000, 0x0800, CRC(aae2344b) SHA1(b02b22cadb43c7ac26c43d443688b9b19d465973) )
	ROM_LOAD( "mtrspdv12.rom4",   0x1800, 0x0800, CRC(920dda33) SHA1(631ee5e6314d9788e7be0ae00a97b55693eeb855) )
ROM_END

ROM_START( mikrolab )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	/* these dumps are taken from PDF so need check with real device */
	ROM_LOAD( "rom-1.bin", 0x0000, 0x0200, BAD_DUMP CRC(eed5f23b) SHA1(c82f7a16ce44c4fcbcb333245555feae1fcdf058))
	ROM_LOAD( "rom-2.bin", 0x0200, 0x0200, BAD_DUMP CRC(726a224f) SHA1(7ed8d2c6dd4fb7836475e207e1972e33a6a91d2f))
ROM_END

ROM_START( nectk85 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "tk85.bin",  0x0000, 0x0800, CRC(8a0b6d7e) SHA1(6acc8c04990692b08929043ccf638761b7301def))
ROM_END

ROM_START( nd80z )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "nd80z.bin",  0x0000, 0x0800, CRC(fe829f1d) SHA1(6fff31884b8d984076d4450ca3a3e48efadeb648))
ROM_END


/* Driver */

/*    YEAR  NAME      PARENT  COMPAT   MACHINE    INPUT     CLASS        INIT     COMPANY                   FULLNAME       FLAGS */
COMP( 1976, tk80,     0,      0,       tk80,      tk80,     driver_device, 0, "Nippon Electronic Company", "TK-80", GAME_NO_SOUND_HW)
COMP( 1980, nectk85,  tk80,   0,       tk85,      tk80,     driver_device, 0, "Nippon Electronic Company", "TK-85", GAME_NO_SOUND_HW)
COMP( 19??, nd80z,    tk80,   0,       nd80z,     tk80,     driver_device, 0, "Chunichi", "ND-80Z", GAME_NO_SOUND_HW)
COMP( 19??, mikrolab, tk80,   0,       mikrolab,  mikrolab, driver_device, 0, "<unknown>", "Mikrolab KR580IK80", GAME_NO_SOUND_HW)
COMP( 19??, ics8080,  tk80,   0,       ics8080,   ics8080,  driver_device, 0, "<unknown>", "ICS8080", GAME_NOT_WORKING | GAME_NO_SOUND_HW)