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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************

        FK-1

        12/05/2009 Skeleton driver.

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/i8255.h"
#include "machine/pit8253.h"
#include "machine/i8251.h"
#include "machine/ram.h"
#include "machine/timer.h"
#include "emupal.h"
#include "screen.h"


class fk1_state : public driver_device
{
public:
	fk1_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_ram(*this, RAM_TAG)
	{ }

	void fk1(machine_config &config);

private:
	required_device<cpu_device> m_maincpu;
	required_device<ram_device> m_ram;

	DECLARE_WRITE8_MEMBER(fk1_ppi_1_a_w);
	DECLARE_WRITE8_MEMBER(fk1_ppi_1_b_w);
	DECLARE_WRITE8_MEMBER(fk1_ppi_1_c_w);
	DECLARE_READ8_MEMBER(fk1_ppi_1_a_r);
	DECLARE_READ8_MEMBER(fk1_ppi_1_b_r);
	DECLARE_READ8_MEMBER(fk1_ppi_1_c_r);
	DECLARE_WRITE8_MEMBER(fk1_ppi_2_a_w);
	DECLARE_WRITE8_MEMBER(fk1_ppi_2_c_w);
	DECLARE_READ8_MEMBER(fk1_ppi_2_b_r);
	DECLARE_READ8_MEMBER(fk1_ppi_2_c_r);
	DECLARE_WRITE8_MEMBER(fk1_ppi_3_a_w);
	DECLARE_WRITE8_MEMBER(fk1_ppi_3_b_w);
	DECLARE_WRITE8_MEMBER(fk1_ppi_3_c_w);
	DECLARE_READ8_MEMBER(fk1_ppi_3_a_r);
	DECLARE_READ8_MEMBER(fk1_ppi_3_b_r);
	DECLARE_READ8_MEMBER(fk1_ppi_3_c_r);
	DECLARE_WRITE_LINE_MEMBER(fk1_pit_out0);
	DECLARE_WRITE_LINE_MEMBER(fk1_pit_out1);
	DECLARE_WRITE_LINE_MEMBER(fk1_pit_out2);
	DECLARE_WRITE8_MEMBER(fk1_intr_w);
	DECLARE_READ8_MEMBER(fk1_bank_ram_r);
	DECLARE_READ8_MEMBER(fk1_bank_rom_r);
	DECLARE_WRITE8_MEMBER(fk1_disk_w);
	DECLARE_READ8_MEMBER(fk1_mouse_r);
	DECLARE_WRITE8_MEMBER(fk1_reset_int_w);
	uint8_t m_video_rol;
	uint8_t m_int_vector;
	virtual void machine_reset() override;
	uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	TIMER_DEVICE_CALLBACK_MEMBER(keyboard_callback);
	TIMER_DEVICE_CALLBACK_MEMBER(vsync_callback);
	IRQ_CALLBACK_MEMBER(fk1_irq_callback);
	void fk1_io(address_map &map);
	void fk1_mem(address_map &map);
};


/*
Port A:
        Printer
Port B:
        Keyboard
Port C:
    READING :
        7 - / OBF(buffer overflow for the printer)
        6 - INTE printer
        5 - ERROR printer
        4 - /PEND, lack of paper
        3 - INTR printer
        2 - INTE keyboard
        1 - IBF (data from the keyboard)
        0 - INTR keyboard
    WRITING :
        6 - INTE printer
        2 - INTE keyboard
 */

WRITE8_MEMBER( fk1_state::fk1_ppi_1_a_w )
{
//  logerror("fk1_ppi_1_a_w %02x\n",data);
}

WRITE8_MEMBER( fk1_state::fk1_ppi_1_b_w )
{
//  logerror("fk1_ppi_1_b_w %02x\n",data);
}

WRITE8_MEMBER( fk1_state::fk1_ppi_1_c_w )
{
	//logerror("fk1_ppi_1_c_w %02x\n",data);
}

READ8_MEMBER( fk1_state::fk1_ppi_1_a_r )
{
	//logerror("fk1_ppi_1_a_r\n");
	return 0xff;
}

READ8_MEMBER( fk1_state::fk1_ppi_1_b_r )
{
//  logerror("fk1_ppi_1_b_r\n");
	return 0;
}

READ8_MEMBER( fk1_state::fk1_ppi_1_c_r )
{
//  logerror("fk1_ppi_1_c_r\n");
	return 0;
}

/*
Port A:
    Writing data to disk
Port B:
    Reading data from disk
Port C:
    READING:
        7 - / OF A data write to disk,
        6 - INTE A,
        5 - Select the drive A, B,
        4 - Not connected
        3 - INTR A
        2 - INTE B read data,
        1 - IBF B read data,
        0 - INTR B

    WRITING:
        6 - INTE A - reading data
        2 - INTE B - writing data
*/

WRITE8_MEMBER( fk1_state::fk1_ppi_2_a_w )
{
//  logerror("write to disk %02x\n",data);
}

WRITE8_MEMBER( fk1_state::fk1_ppi_2_c_w )
{
//  logerror("fk1_ppi_2_c_w %02x\n",data);
}

READ8_MEMBER( fk1_state::fk1_ppi_2_b_r )
{
//  logerror("read from disk\n");
	return 0;
}

READ8_MEMBER( fk1_state::fk1_ppi_2_c_r )
{
//  logerror("fk1_ppi_2_c_r\n");
	return 0;
}


/*

Port A:
    6 - / disk, authorization disk operations,
    3 - INTE MOUSE, permit suspension from mouse,
    2 - INTE RTC from the system clock of 50 Hz,
    1 and 0 - to set the type for hours write to the disk (01 index, 11 address mark, mark the date, 00 other).

Port B:
    Video ROL register
Port C

    READING:
    7 - INDEX ( index mark on the disk)
    6 - I do not know,
    5 - WRITE_PROTECT the protected disk,
    4 - TRAC_00 as a sign of trace

    WRITING:
    3 - HEAD LOAD
    2 - TRACK_43
    1 - DIRC - direction to set the direction of stepping disk
    0 - STEP, move disk (0 1 .. 0.).

*/
WRITE8_MEMBER( fk1_state::fk1_ppi_3_a_w )
{
//  logerror("fk1_ppi_3_a_w %02x\n",data);
}

WRITE8_MEMBER( fk1_state::fk1_ppi_3_b_w )
{
	m_video_rol = data;
}

WRITE8_MEMBER( fk1_state::fk1_ppi_3_c_w )
{
//  logerror("fk1_ppi_3_c_w %02x\n",data);
}

READ8_MEMBER( fk1_state::fk1_ppi_3_a_r )
{
//  logerror("fk1_ppi_3_a_r\n");
	return 0;
}

READ8_MEMBER( fk1_state::fk1_ppi_3_b_r )
{
	return m_video_rol;
}

READ8_MEMBER( fk1_state::fk1_ppi_3_c_r )
{
//  logerror("fk1_ppi_3_c_r\n");
	return 0;
}

WRITE_LINE_MEMBER( fk1_state::fk1_pit_out0 )
{
	// System time
	logerror("WRITE_LINE_MEMBER(fk1_pit_out0)\n");
}

WRITE_LINE_MEMBER( fk1_state::fk1_pit_out1 )
{
	// Timeout for disk operation
	logerror("WRITE_LINE_MEMBER(fk1_pit_out1)\n");
}

WRITE_LINE_MEMBER( fk1_state::fk1_pit_out2 )
{
	// Overflow for disk operations
	logerror("WRITE_LINE_MEMBER(fk1_pit_out2)\n");
}

/*
    0 no interrupt allowed,
    1 allowed INTR-7,
    2 allowed INTR-7 and INTR-6,
    8 any interruption allowed.
*/

WRITE8_MEMBER( fk1_state::fk1_intr_w )
{
	logerror("fk1_intr_w %02x\n",data);
}

READ8_MEMBER( fk1_state::fk1_bank_ram_r )
{
	address_space &space_mem = m_maincpu->space(AS_PROGRAM);
	uint8_t *ram = m_ram->pointer();

	space_mem.install_write_bank(0x0000, 0x3fff, "bank1");
	membank("bank1")->set_base(ram);
	membank("bank2")->set_base(ram + 0x4000);
	return 0;
}

READ8_MEMBER( fk1_state::fk1_bank_rom_r )
{
	address_space &space_mem = m_maincpu->space(AS_PROGRAM);
	space_mem.unmap_write(0x0000, 0x3fff);
	membank("bank1")->set_base(memregion("maincpu")->base());
	membank("bank2")->set_base(m_ram->pointer() + 0x10000);
	return 0;
}

/*
    4 - FORMAT authorization
    3 - READ_ADDRESS_MARK
    2 - READ_DATA_MARK
    1 - WRITE
    0 - READ
    Functions are allowed in one.
*/

WRITE8_MEMBER( fk1_state::fk1_disk_w )
{
//  logerror("fk1_disk_w %02x\n",data);
}

/*
7 and 6 - 1 to connected mouse and 0 if not connected,
5 - / T2, right-click
4 - / T1, left-click
3 - / BY, Y-axis
2 - / AY, Y-axis
1 - / BX, X-axis
0 - / AX, X-axis
*/

READ8_MEMBER( fk1_state::fk1_mouse_r )
{
//  logerror("fk1_mouse_r\n");
	return 0;
}

/*Write to port 70 resets the interrupt from the system clock of 50 Hz. */

WRITE8_MEMBER( fk1_state::fk1_reset_int_w )
{
	logerror("fk1_reset_int_w\n");
}

void fk1_state::fk1_mem(address_map &map)
{
	map(0x0000, 0x3fff).bankrw("bank1");
	map(0x4000, 0x7fff).bankrw("bank2");
	map(0x8000, 0xbfff).bankrw("bank3");
	map(0xc000, 0xffff).bankrw("bank4");
}

void fk1_state::fk1_io(address_map &map)
{
	map.global_mask(0xff);
	map.unmap_value_high();
	map(0x00, 0x03).rw("ppi8255_1", FUNC(i8255_device::read), FUNC(i8255_device::write));
	map(0x10, 0x13).rw("pit8253", FUNC(pit8253_device::read), FUNC(pit8253_device::write));
	map(0x20, 0x23).rw("ppi8255_2", FUNC(i8255_device::read), FUNC(i8255_device::write));
	map(0x30, 0x30).rw(FUNC(fk1_state::fk1_bank_ram_r), FUNC(fk1_state::fk1_intr_w));
	map(0x40, 0x41).rw("uart", FUNC(i8251_device::read), FUNC(i8251_device::write));
	map(0x50, 0x50).rw(FUNC(fk1_state::fk1_bank_rom_r), FUNC(fk1_state::fk1_disk_w));
	map(0x60, 0x63).rw("ppi8255_3", FUNC(i8255_device::read), FUNC(i8255_device::write));
	map(0x70, 0x70).rw(FUNC(fk1_state::fk1_mouse_r), FUNC(fk1_state::fk1_reset_int_w));
}

/* Input ports */
static INPUT_PORTS_START( fk1 )
	PORT_START("LINE0")
		PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
		PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
		PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('\"')
		PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
		PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR(0xA4)
		PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
		PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
		PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
INPUT_PORTS_END

TIMER_DEVICE_CALLBACK_MEMBER(fk1_state::keyboard_callback)
{
	if (ioport("LINE0")->read())
	{
		m_int_vector = 6;
		m_maincpu->set_input_line(0, HOLD_LINE);
	}
}

/*
7 ? DATA_READY
6 ? TIMEOUT
5 ? OVERFLOW
4 ? RTC_50HZ
3 ? MOUSE
2 ? SIO
1 ? KEYBOARD
0 ? PRINTER
*/

IRQ_CALLBACK_MEMBER(fk1_state::fk1_irq_callback)
{
	logerror("IRQ %02x\n", m_int_vector*2);
	return m_int_vector * 2;
}

TIMER_DEVICE_CALLBACK_MEMBER(fk1_state::vsync_callback)
{
	m_int_vector = 3;
	m_maincpu->set_input_line(0, HOLD_LINE);
}


void fk1_state::machine_reset()
{
	address_space &space = m_maincpu->space(AS_PROGRAM);
	uint8_t *ram = m_ram->pointer();

	space.unmap_write(0x0000, 0x3fff);
	membank("bank1")->set_base(memregion("maincpu")->base()); // ROM
	membank("bank2")->set_base(ram + 0x10000); // VRAM
	membank("bank3")->set_base(ram + 0x8000);
	membank("bank4")->set_base(ram + 0xc000);
}

uint32_t fk1_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	uint8_t code;
	int y, x, b;
	uint8_t *ram = m_ram->pointer();

	for (x = 0; x < 64; x++)
	{
		for (y = 0; y < 256; y++)
		{
			code = ram[x * 0x100 + ((y + m_video_rol) & 0xff) + 0x10000];
			for (b = 0; b < 8; b++)
			{
				bitmap.pix16(y, x*8+b) =  ((code << b) & 0x80) ? 1 : 0;
			}
		}
	}
	return 0;
}

void fk1_state::fk1(machine_config &config)
{
	/* basic machine hardware */
	Z80(config, m_maincpu, XTAL(8'000'000) / 2);
	m_maincpu->set_addrmap(AS_PROGRAM, &fk1_state::fk1_mem);
	m_maincpu->set_addrmap(AS_IO, &fk1_state::fk1_io);
	m_maincpu->set_irq_acknowledge_callback(FUNC(fk1_state::fk1_irq_callback));

	/* video hardware */
	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
	screen.set_refresh_hz(50);
	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
	screen.set_screen_update(FUNC(fk1_state::screen_update));
	screen.set_size(512, 256);
	screen.set_visarea(0, 512-1, 0, 256-1);
	screen.set_palette("palette");

	PALETTE(config, "palette", palette_device::MONOCHROME);

	pit8253_device &pit8253(PIT8253(config, "pit8253", 0));
	pit8253.set_clk<0>(50);
	pit8253.out_handler<0>().set(FUNC(fk1_state::fk1_pit_out0));
	pit8253.set_clk<1>(1000000);
	pit8253.out_handler<1>().set(FUNC(fk1_state::fk1_pit_out1));
	pit8253.set_clk<2>(0);
	pit8253.out_handler<2>().set(FUNC(fk1_state::fk1_pit_out2));

	i8255_device &ppi1(I8255(config, "ppi8255_1"));
	ppi1.in_pa_callback().set(FUNC(fk1_state::fk1_ppi_1_a_r));
	ppi1.out_pa_callback().set(FUNC(fk1_state::fk1_ppi_1_a_w));
	ppi1.in_pb_callback().set(FUNC(fk1_state::fk1_ppi_1_b_r));
	ppi1.out_pb_callback().set(FUNC(fk1_state::fk1_ppi_1_b_w));
	ppi1.in_pc_callback().set(FUNC(fk1_state::fk1_ppi_1_c_r));
	ppi1.out_pc_callback().set(FUNC(fk1_state::fk1_ppi_1_c_w));

	i8255_device &ppi2(I8255(config, "ppi8255_2"));
	ppi2.out_pa_callback().set(FUNC(fk1_state::fk1_ppi_2_a_w));
	ppi2.in_pb_callback().set(FUNC(fk1_state::fk1_ppi_2_b_r));
	ppi2.in_pc_callback().set(FUNC(fk1_state::fk1_ppi_2_c_r));
	ppi2.out_pc_callback().set(FUNC(fk1_state::fk1_ppi_2_c_w));

	i8255_device &ppi3(I8255(config, "ppi8255_3"));
	ppi3.in_pa_callback().set(FUNC(fk1_state::fk1_ppi_3_a_r));
	ppi3.out_pa_callback().set(FUNC(fk1_state::fk1_ppi_3_a_w));
	ppi3.in_pb_callback().set(FUNC(fk1_state::fk1_ppi_3_b_r));
	ppi3.out_pb_callback().set(FUNC(fk1_state::fk1_ppi_3_b_w));
	ppi3.in_pc_callback().set(FUNC(fk1_state::fk1_ppi_3_c_r));
	ppi3.out_pc_callback().set(FUNC(fk1_state::fk1_ppi_3_c_w));

	/* uart */
	I8251(config, "uart", 0);

	/* internal ram */
	RAM(config, RAM_TAG).set_default_size("80K"); // 64 + 16

	TIMER(config, "keyboard_timer").configure_periodic(FUNC(fk1_state::keyboard_callback), attotime::from_hz(24000));
	TIMER(config, "vsync_timer").configure_periodic(FUNC(fk1_state::vsync_callback), attotime::from_hz(50));
}

/* ROM definition */
ROM_START( fk1 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS( 0, "orig", "Original BIOS" )
	ROMX_LOAD( "fk1.u65",      0x0000, 0x0800, CRC(145561f8) SHA1(a4eb17d773e51b34620c508b6cebcb4531ae99c2), ROM_BIOS(0))
	ROM_SYSTEM_BIOS( 1, "diag", "Diag BIOS" )
	ROMX_LOAD( "fk1-diag.u65", 0x0000, 0x0800, CRC(e0660ae1) SHA1(6ad609049b28f27126af0a8a6224362351073dee), ROM_BIOS(1))
ROM_END

/* Driver */

//    YEAR  NAME  PARENT  COMPAT  MACHINE  INPUT  CLASS      INIT        COMPANY                  FULLNAME  FLAGS
COMP( 1989, fk1,  0,      0,      fk1,     fk1,   fk1_state, empty_init, "Statni statek Klicany", "FK-1",   MACHINE_NOT_WORKING | MACHINE_NO_SOUND )