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/*

Visual 1050

PCB Layout
----------

REV B-1

|---------------------------------------------------------------------------------------------------|
|                                                               |----------|                        |
|           9216                                                |   ROM0   |        LS74            |
|                                                               |----------|                        |
--                      LS00    7406            LS255   LS393                       4164    4164    |
||      |-----------|                                           |----------|                        |
||      |   WD1793  |   LS14    7407    -       LS393   LS74    |  8251A   |        4164    4164    |
||      |-----------|                   |                       |----------|                        |
|C                                      |                                           4164    4164    |
|N      7406    LS00    LS74    LS14    |C      LS20    LS08    LS75                                |
|1                                      |N                                          4164    4164    |
||                                      |5                                                          |
||      7406    LS195           LS244   |       LS04    LS32    LS08                4164    4164    |
||                                      -                                                           |
||      |------------|  |--------|                                                  4164    4164    |
-- BAT  |   8255A    |  |  8214  |              LS139   LS32    LS138   LS17                        |
--      |------------|  |--------|      -                                           4164    4164    |
||                                      |C                                                          |
||      |--------|      LS00    LS00    |N      LS00    LS32    LS138               4164    4164    |
|C      | 8251A  |                      |6                                                          |
|N      |--------|      |------------|  -                       |------------|                      |
|2                      |   8255A    |                          |    Z80A    |                      |
||      1488 1489  RTC  |------------|          LS00    LS32    |------------|      LS257   LS257   |
||                                                                                                  |
--                                                              |------------|      |------------|  |
|                                                       LS04    |   8255A    |      |   8255A    |  |
|                                                               |------------|      |------------|  |
|                                                                                                   |
|                                               7404                                LS257   LS257   |
|                                                   16MHz                                           |
|       LS04    LS74    LS257                                                       9016    9016    |
|                                                                                                   |
--      LS74    LS04    LS74    LS163                                               9016    9016    |
||                                                                                                  |
||                                                                                  9016    9016    |
||      LS02    LS163   LS74    7404                            7404                                |
||                                                                                  9016    9016    |
||                                                                                                  |
|C      LS244   LS10    LS257                   LS362           |----------|        9016    9016    |
|N                                                              |   ROM1   |                        |
|3      LS245   7404    LS273                   LS32            |----------|        9016    9016    |
||                                                                                                  |
||      7407            LS174                   LS32                                9016    9016    |
||              15.36MHz                                                                            |
||                                                              |------------|      9016    9016    |
--                      LS09    LS04            LS12            |    6502    |                      |
|                                                               |------------|      9016    9016    |
--                                                                                                  |
|C              LS175   LS86    LS164           LS164                               9016    9016    |
|N                                                              |------------|                      |
|4                                                              |    6845    |      LS253   LS253   |
--      7426    LS02    LS74    LS00            LS164           |------------|                      |
|                                                                                   LS253   LS253   |
|                       REV B-1 W/O 1059            S/N 492                                         |
|---------------------------------------------------------------------------------------------------|

Notes:
    All IC's shown.

    ROM0    - "IC 244-032 V1.0"
    ROM1    - "IC 244-033 V1.0"
    Z80A    - Zilog Z8400APS Z80A CPU
    6502    - Synertek SY6502A CPU
    4164    - NEC D4164-2 64Kx1 Dynamic RAM
    9016    - AMD AM9016EPC 16Kx1 Dynamic RAM
    8214    - NEC uPB8214C Priority Interrupt Control Unit
    8255A   - NEC D8255AC-5 Programmable Peripheral Interface
    8251A   - NEC D8251AC Programmable Communication Interface
    WD1793  - Mitsubishi MB8877 Floppy Disc Controller
    9216    - SMC FDC9216 Floppy Disk Data Separator
    1488    - Motorola MC1488 Quad Line EIA-232D Driver
    1489    - Motorola MC1489 Quad Line Receivers
    6845    - Hitachi HD46505SP CRT Controller
    RTC     - OKI MSM58321RS Real Time Clock
    BAT     - 3.4V battery
    CN1     - parallel connector
    CN2     - serial connector
    CN3     - winchester connector
    CN4     - monitor connector
    CN5     - floppy data connector
    CN6     - floppy power connector

*/

/*

    TODO:

    - write to banked RAM at 0x0000-0x1fff when ROM is active
    - real keyboard w/i8049
    - keyboard beeper (NE555 wired in strange mix of astable/monostable modes)
    - Winchester (Tandon TM501/CMI CM-5412 10MB drive on Xebec S1410 controller)

        chdman createhd -chs 306,2,32 -ss 256 -o tm501.chd
        chdman createhd -chs 306,4,32 -ss 256 -o cm5412.chd

*/

#include "includes/v1050.h"

void v1050_state::set_interrupt(UINT8 mask, int state)
{
	if (state)
	{
		m_int_state |= mask;
	}
	else
	{
		m_int_state &= ~mask;
	}

	m_pic->r_w(~(m_int_state & m_int_mask));
}

void v1050_state::bankswitch()
{
	address_space &program = m_maincpu->space(AS_PROGRAM);

	int bank = (m_bank >> 1) & 0x03;

	if (BIT(m_bank, 0))
	{
		program.install_readwrite_bank(0x0000, 0x1fff, "bank1");
		membank("bank1")->set_entry(bank);
	}
	else
	{
		program.install_read_bank(0x0000, 0x1fff, "bank1");
		program.unmap_write(0x0000, 0x1fff);
		membank("bank1")->set_entry(3);
	}

	membank("bank2")->set_entry(bank);

	if (bank == 2)
	{
		program.unmap_readwrite(0x4000, 0xbfff);
	}
	else
	{
		program.install_readwrite_bank(0x4000, 0x7fff, "bank3");
		program.install_readwrite_bank(0x8000, 0xbfff, "bank4");
		membank("bank3")->set_entry(bank);
		membank("bank4")->set_entry(bank);
	}

	membank("bank5")->set_entry(bank);
}

// Keyboard HACK

static const UINT8 V1050_KEYCODES[4][12][8] =
{
	{   // unshifted
		{ 0xc0, 0xd4, 0xd8, 0xdc, 0xe0, 0xe4, 0xe8, 0xec },
		{ 0xf0, 0xfc, 0x90, 0xf4, 0xf8, 0x94, 0xc4, 0xc8 },
		{ 0xcc, 0xd0, 0x1b, 0x31, 0x32, 0x33, 0x34, 0x35 },
		{ 0x36, 0x37, 0x38, 0x39, 0x30, 0x2d, 0x3d, 0x60 },
		{ 0x08, 0x88, 0x8c, 0x71, 0x77, 0x65, 0x72, 0x74 },
		{ 0x79, 0x75, 0x69, 0x6f, 0x70, 0x5b, 0x5d, 0x0d },
		{ 0x7f, 0x00, 0x80, 0x61, 0x73, 0x64, 0x66, 0x67 },
		{ 0x68, 0x6a, 0x6b, 0x6c, 0x3b, 0x27, 0x5c, 0x84 },
		{ 0x00, 0x7a, 0x78, 0x63, 0x76, 0x62, 0x6e, 0x6d },
		{ 0x2c, 0x2e, 0x2f, 0x00, 0x0a, 0x20, 0x81, 0x82 },
		{ 0xb7, 0xb8, 0xb9, 0xad, 0xb4, 0xb5, 0xb6, 0xac },
		{ 0xb1, 0xb2, 0xb3, 0x83, 0xb0, 0xae, 0x00, 0x00 },
	},

	{	// shifted
		{ 0xc1, 0xd5, 0xd9, 0xdd, 0xe1, 0xe5, 0xe9, 0xed },
		{ 0xf1, 0xfd, 0x91, 0xf5, 0xf9, 0x95, 0xc5, 0xc9 },
		{ 0xcd, 0xd1, 0x1b, 0x21, 0x40, 0x23, 0x24, 0x25 },
		{ 0x5e, 0x26, 0x2a, 0x28, 0x29, 0x5f, 0x2b, 0x7e },
		{ 0x08, 0x89, 0x8d, 0x51, 0x57, 0x45, 0x52, 0x54 },
		{ 0x59, 0x55, 0x49, 0x4f, 0x50, 0x7b, 0x7d, 0x0d },
		{ 0x7f, 0x00, 0x80, 0x41, 0x53, 0x44, 0x46, 0x47 },
		{ 0x48, 0x4a, 0x4b, 0x4c, 0x3a, 0x22, 0x7c, 0x85 },
		{ 0x00, 0x5a, 0x58, 0x43, 0x56, 0x42, 0x4e, 0x4d },
		{ 0x3c, 0x3e, 0x3f, 0x0a, 0x20, 0x81, 0x82, 0xb7 },
		{ 0xb8, 0xb9, 0xad, 0xb4, 0xb5, 0xb6, 0xac, 0xb1 },
		{ 0xb2, 0xb3, 0x83, 0xb0, 0xa0, 0x00, 0x00, 0x00 },
	},

	{	// control
		{ 0xc2, 0xd6, 0xda, 0xde, 0xe2, 0xe6, 0xea, 0xee },
		{ 0xf2, 0xfe, 0x92, 0xf6, 0xfa, 0x96, 0xc6, 0xca },
		{ 0xce, 0xd2, 0x1b, 0x31, 0x32, 0x33, 0x34, 0x35 },
		{ 0x36, 0x37, 0x38, 0x39, 0x30, 0x2d, 0x3d, 0x00 },
		{ 0x08, 0x8a, 0x8e, 0x11, 0x17, 0x05, 0x12, 0x14 },
		{ 0x19, 0x15, 0x09, 0x0f, 0x10, 0x1b, 0x1d, 0x0d },
		{ 0x7f, 0x00, 0x80, 0x01, 0x13, 0x04, 0x06, 0x07 },
		{ 0x08, 0x0a, 0x0b, 0x0c, 0x3b, 0x27, 0x1c, 0x86 },
		{ 0x00, 0x1a, 0x18, 0x03, 0x16, 0x02, 0x0e, 0x0d },
		{ 0x2c, 0x2e, 0x2f, 0x0a, 0x20, 0x81, 0x82, 0xb7 },
		{ 0xb8, 0xb9, 0xad, 0xb4, 0xb5, 0xb6, 0xac, 0xb1 },
		{ 0xb2, 0xb3, 0x83, 0xb0, 0xae, 0x00, 0x00, 0x00 },
	},

	{	// shift & control
		{ 0xc3, 0xd7, 0xdb, 0xdf, 0xe3, 0xe7, 0xeb, 0xef },
		{ 0xf3, 0xff, 0x93, 0xf7, 0xfb, 0x97, 0xc7, 0xcb },
		{ 0xcf, 0xd3, 0x1b, 0x21, 0x00, 0x23, 0x24, 0x25 },
		{ 0x1e, 0x26, 0x2a, 0x28, 0x29, 0x1f, 0x2b, 0x1e },
		{ 0x08, 0x8b, 0x8f, 0x11, 0x17, 0x05, 0x12, 0x14 },
		{ 0x19, 0x15, 0x09, 0x0f, 0x10, 0x1b, 0x1d, 0x0d },
		{ 0x7f, 0x00, 0x80, 0x01, 0x13, 0x04, 0x06, 0x07 },
		{ 0x08, 0x0a, 0x0b, 0x0c, 0x3a, 0x22, 0x1c, 0x87 },
		{ 0x00, 0x1a, 0x18, 0x03, 0x16, 0x02, 0x0e, 0x0d },
		{ 0x3c, 0x3e, 0x3f, 0x0a, 0x20, 0x81, 0x82, 0xb7 },
		{ 0xb8, 0xb9, 0xad, 0xb4, 0xb5, 0xb6, 0xac, 0xb1 },
		{ 0xb2, 0xb3, 0x83, 0xb0, 0xae, 0x00, 0x00, 0x00 },
	}
};

void v1050_state::scan_keyboard()
{
	static const char *const keynames[] = { "ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7", "ROW8", "ROW9", "ROW10", "ROW11" };
	int table = 0, row, col;
	int keydata = 0xff;

	UINT8 line_mod = ioport("ROW12")->read();

	if((line_mod & 0x07) && (line_mod & 0x18))
	{
		table = 3;  // shift & control
	}
	else if (line_mod & 0x07)
	{
		table = 1; // shifted
	}
	else if (line_mod & 0x18)
	{
		table = 2; // ctrl
	}

	// scan keyboard
	for (row = 0; row < 12; row++)
	{
		UINT8 data = ioport(keynames[row])->read();

		for (col = 0; col < 8; col++)
		{
			if (!BIT(data, col))
			{
				// latch key data
				keydata = V1050_KEYCODES[table][row][col];

				if (m_keydata != keydata)
				{
					m_keydata = keydata;
					m_keyavail = 1;

					set_interrupt(INT_KEYBOARD, 1);
					return;
				}
			}
		}
	}

	m_keydata = keydata;
}

TIMER_DEVICE_CALLBACK_MEMBER(v1050_state::v1050_keyboard_tick)
{
	scan_keyboard();
}

READ8_MEMBER( v1050_state::kb_data_r )
{
	m_keyavail = 0;

	set_interrupt(INT_KEYBOARD, 0);

	return m_keydata;
}

READ8_MEMBER( v1050_state::kb_status_r )
{
	UINT8 val =	m_uart_kb->status_r(space, 0);

	return val | (m_keyavail ? 0x02 : 0x00);
}

// Z80 Read/Write Handlers

WRITE8_MEMBER( v1050_state::v1050_i8214_w )
{
	m_pic->b_w((data >> 1) & 0x07);
	m_pic->sgs_w(BIT(data, 4));
}

READ8_MEMBER( v1050_state::vint_clr_r )
{
	set_interrupt(INT_VSYNC, 0);

	return 0xff;
}

WRITE8_MEMBER( v1050_state::vint_clr_w )
{
	set_interrupt(INT_VSYNC, 0);
}

READ8_MEMBER( v1050_state::dint_clr_r )
{
	set_interrupt(INT_DISPLAY, 0);

	return 0xff;
}

WRITE8_MEMBER( v1050_state::dint_clr_w )
{
	set_interrupt(INT_DISPLAY, 0);
}

WRITE8_MEMBER( v1050_state::bank_w )
{
	m_bank = data;

	bankswitch();
}

// SY6502A Read/Write Handlers

WRITE8_MEMBER( v1050_state::dint_w )
{
	set_interrupt(INT_DISPLAY, 1);
}

WRITE8_MEMBER( v1050_state::dvint_clr_w )
{
	m_subcpu->set_input_line(INPUT_LINE_IRQ0, CLEAR_LINE);
}

WRITE8_MEMBER( v1050_state::sasi_data_w )
{
	data_out = data;

	if( !m_sasibus->scsi_io_r() )
	{
		m_sasibus->scsi_data_w( data );
	}
}

WRITE_LINE_MEMBER( v1050_state::sasi_io_w )
{
	if( !state )
	{
		m_sasibus->scsi_data_w( data_out );
	}
	else
	{
		m_sasibus->scsi_data_w( 0 );
	}
}

READ8_MEMBER( v1050_state::sasi_status_r )
{
	/*

        bit     description

        0       REQ-
        1       BUSY
        2       MESSAGE
        3       C/D-
        4       I-/O
        5
        6
        7

    */

	UINT8 data = 0;

	data |= !m_sasibus->scsi_req_r();
	data |= m_sasibus->scsi_bsy_r() << 1;
	data |= m_sasibus->scsi_msg_r() << 2;
	data |= m_sasibus->scsi_cd_r() << 3;
	data |= !m_sasibus->scsi_io_r() << 4;

	return data;
}

TIMER_DEVICE_CALLBACK_MEMBER(v1050_state::sasi_ack_tick)
{
	m_sasibus->scsi_ack_w(0);
}

TIMER_DEVICE_CALLBACK_MEMBER(v1050_state::sasi_rst_tick)
{
	m_sasibus->scsi_rst_w(0);
}

WRITE8_MEMBER( v1050_state::sasi_ctrl_w )
{
	/*

        bit     description

        0       SEL
        1       ACK
        2
        3
        4
        5
        6
        7       RST

    */

	m_sasibus->scsi_sel_w(BIT(data, 0));

	if (BIT(data, 1))
	{
		// send acknowledge pulse
		m_sasibus->scsi_ack_w(1);

		m_timer_ack->adjust(attotime::from_nsec(100));
	}

	if (BIT(data, 7))
	{
		// send reset pulse
		m_sasibus->scsi_rst_w(1);

		m_timer_rst->adjust(attotime::from_nsec(100));
	}
}

// Memory Maps

static ADDRESS_MAP_START( v1050_mem, AS_PROGRAM, 8, v1050_state )
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE(0x0000, 0x1fff) AM_RAMBANK("bank1")
	AM_RANGE(0x2000, 0x3fff) AM_RAMBANK("bank2")
	AM_RANGE(0x4000, 0x7fff) AM_RAMBANK("bank3")
	AM_RANGE(0x8000, 0xbfff) AM_RAMBANK("bank4")
	AM_RANGE(0xc000, 0xffff) AM_RAMBANK("bank5")
ADDRESS_MAP_END

static ADDRESS_MAP_START( v1050_io, AS_IO, 8, v1050_state )
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x84, 0x87) AM_DEVREADWRITE(I8255A_DISP_TAG, i8255_device, read, write)
//  AM_RANGE(0x88, 0x88) AM_DEVREADWRITE(I8251A_KB_TAG, i8251_device, data_r, data_w)
//  AM_RANGE(0x89, 0x89) AM_DEVREADWRITE(I8251A_KB_TAG, i8251_device, status_r, control_w)
	AM_RANGE(0x88, 0x88) AM_READ(kb_data_r) AM_DEVWRITE(I8251A_KB_TAG, i8251_device, data_w)
	AM_RANGE(0x89, 0x89) AM_READ(kb_status_r) AM_DEVWRITE(I8251A_KB_TAG, i8251_device, control_w)
	AM_RANGE(0x8c, 0x8c) AM_DEVREADWRITE(I8251A_SIO_TAG, i8251_device, data_r, data_w)
	AM_RANGE(0x8d, 0x8d) AM_DEVREADWRITE(I8251A_SIO_TAG, i8251_device, status_r, control_w)
	AM_RANGE(0x90, 0x93) AM_DEVREADWRITE(I8255A_MISC_TAG, i8255_device, read, write)
	AM_RANGE(0x94, 0x97) AM_DEVREADWRITE(MB8877_TAG, mb8877_t, read, write)
	AM_RANGE(0x9c, 0x9f) AM_DEVREADWRITE(I8255A_RTC_TAG, i8255_device, read, write)
	AM_RANGE(0xa0, 0xa0) AM_READWRITE(vint_clr_r, vint_clr_w)
	AM_RANGE(0xb0, 0xb0) AM_READWRITE(dint_clr_r, dint_clr_w)
	AM_RANGE(0xc0, 0xc0) AM_WRITE(v1050_i8214_w)
	AM_RANGE(0xd0, 0xd0) AM_WRITE(bank_w)
	AM_RANGE(0xe0, 0xe0) AM_WRITE(sasi_data_w) AM_DEVREAD(SASIBUS_TAG ":host", scsicb_device, scsi_data_r)
	AM_RANGE(0xe1, 0xe1) AM_READWRITE(sasi_status_r, sasi_ctrl_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START( v1050_crt_mem, AS_PROGRAM, 8, v1050_state )
	AM_RANGE(0x0000, 0x7fff) AM_READWRITE(videoram_r, videoram_w) AM_SHARE("video_ram")
	AM_RANGE(0x8000, 0x8000) AM_DEVWRITE(H46505_TAG, mc6845_device, address_w)
	AM_RANGE(0x8001, 0x8001) AM_DEVREADWRITE(H46505_TAG, mc6845_device, register_r, register_w)
	AM_RANGE(0x9000, 0x9003) AM_DEVREADWRITE(I8255A_M6502_TAG, i8255_device, read, write)
	AM_RANGE(0xa000, 0xa000) AM_READWRITE(attr_r, attr_w)
	AM_RANGE(0xb000, 0xb000) AM_WRITE(dint_w)
	AM_RANGE(0xc000, 0xc000) AM_WRITE(dvint_clr_w)
	AM_RANGE(0xe000, 0xffff) AM_ROM
ADDRESS_MAP_END

// Input Ports

static INPUT_PORTS_START( v1050 )
	PORT_START("ROW0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) // HELP
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F1)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F2)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F3)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F4)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F5)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F6)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F7)

	PORT_START("ROW1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F8)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F9)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F10)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F11)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F12)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F13)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F14)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F15)

	PORT_START("ROW2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) // F16
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) // F17
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')

	PORT_START("ROW3")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('`') PORT_CHAR('~')

	PORT_START("ROW4")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BACKSPACE") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BREAK") PORT_CODE(KEYCODE_PAUSE)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')

	PORT_START("ROW5")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR('\r')

	PORT_START("ROW6")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')

	PORT_START("ROW7")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SCRLOCK)

	PORT_START("ROW8")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) // SHIFT
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')

	PORT_START("ROW9")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) // SHIFT
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LINE FEED") PORT_CODE(KEYCODE_ENTER_PAD)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SPACE)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_NUMLOCK) // DOWN
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_NUMLOCK) // UP

	PORT_START("ROW10")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 7") PORT_CODE(KEYCODE_7_PAD)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 8") PORT_CODE(KEYCODE_8_PAD)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 9") PORT_CODE(KEYCODE_9_PAD)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad -") PORT_CODE(KEYCODE_MINUS_PAD)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 4") PORT_CODE(KEYCODE_4_PAD)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 5") PORT_CODE(KEYCODE_5_PAD)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 6") PORT_CODE(KEYCODE_6_PAD)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))

	PORT_START("ROW11")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 1") PORT_CODE(KEYCODE_1_PAD)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 2") PORT_CODE(KEYCODE_2_PAD)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 3") PORT_CODE(KEYCODE_3_PAD)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 0") PORT_CODE(KEYCODE_0_PAD)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad +") PORT_CODE(KEYCODE_PLUS_PAD)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )

	PORT_START("ROW12")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("LEFT SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("RIGHT SHIFT") PORT_CODE(KEYCODE_RSHIFT)
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("LEFT CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL))
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("RIGHT CTRL") PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_MAMEKEY(RCONTROL))
INPUT_PORTS_END

// 8214 Interface

WRITE_LINE_MEMBER(v1050_state::pic_int_w)
{
	if (state == ASSERT_LINE)
	{
		m_maincpu->set_input_line(INPUT_LINE_IRQ0, ASSERT_LINE);
	}
}

static I8214_INTERFACE( pic_intf )
{
	DEVCB_DRIVER_LINE_MEMBER(v1050_state,pic_int_w),
	DEVCB_NULL
};

// MSM58321 Interface

static MSM58321_INTERFACE( rtc_intf )
{
	DEVCB_NULL
};

// Display 8255A Interface

WRITE8_MEMBER(v1050_state::disp_ppi_pc_w)
{
	device_t *device = machine().device(I8255A_M6502_TAG);
	i8255_device *ppi = static_cast<i8255_device*>(device);

	ppi->pc2_w(BIT(data, 6));
	ppi->pc4_w(BIT(data, 7));
}

static I8255A_INTERFACE( disp_ppi_intf )
{
	DEVCB_DEVICE_MEMBER(I8255A_M6502_TAG, i8255_device, pb_r),	// Port A read
	DEVCB_NULL,							// Port A write
	DEVCB_NULL,							// Port B read
	DEVCB_NULL,							// Port B write
	DEVCB_NULL,							// Port C read
	DEVCB_DRIVER_MEMBER(v1050_state,disp_ppi_pc_w)		// Port C write
};

WRITE8_MEMBER(v1050_state::m6502_ppi_pc_w)
{
	device_t *device = machine().device(I8255A_DISP_TAG);
	i8255_device *ppi = static_cast<i8255_device*>(device);

	ppi->pc2_w(BIT(data, 7));
	ppi->pc4_w(BIT(data, 6));
}

static I8255A_INTERFACE( m6502_ppi_intf )
{
	DEVCB_DEVICE_MEMBER(I8255A_DISP_TAG, i8255_device, pb_r),	// Port A read
	DEVCB_NULL,							// Port A write
	DEVCB_NULL,							// Port B read
	DEVCB_NULL,							// Port B write
	DEVCB_NULL,							// Port C read
	DEVCB_DRIVER_MEMBER(v1050_state,m6502_ppi_pc_w)	// Port C write
};

// Miscellanous 8255A Interface

WRITE8_MEMBER( v1050_state::misc_ppi_pa_w )
{
	/*

        bit     signal      description

        PA0     f_ds<0>     drive 0 select
        PA1     f_ds<1>     drive 1 select
        PA2     f_ds<2>     drive 2 select
        PA3     f_ds<3>     drive 3 select
        PA4     f_side_1    floppy side select
        PA5     f_pre_comp  precompensation
        PA6     f_motor_on* floppy motor
        PA7     f_dden*     double density select

    */

	// floppy drive select
	floppy_image_device *floppy = NULL;

	if (!BIT(data, 0)) floppy = m_floppy0->get_device();
	if (!BIT(data, 1)) floppy = m_floppy1->get_device();
	if (!BIT(data, 2)) floppy = m_floppy2->get_device();
	if (!BIT(data, 3)) floppy = m_floppy3->get_device();

	m_fdc->set_floppy(floppy);

	// floppy side select
	if (floppy) floppy->ss_w(BIT(data, 4));

	// floppy motor
	if (floppy) floppy->mon_w(BIT(data, 6));

	// density select
	m_fdc->dden_w(BIT(data, 7));
}

WRITE8_MEMBER(v1050_state::misc_ppi_pb_w)
{
	m_centronics->write(~data & 0xff);
}

READ8_MEMBER(v1050_state::misc_ppi_pc_r)
{
	/*

        bit     signal      description

        PC0     pr_strobe   printer strobe
        PC1     f_int_enb   floppy interrupt enable
        PC2     baud_sel_a
        PC3     baud_sel_b
        PC4     pr_busy*    printer busy
        PC5     pr_pe*      printer paper end
        PC6
        PC7

    */

	UINT8 data = 0;

	data |= m_centronics->not_busy_r() << 4;
	data |= m_centronics->pe_r() << 5;

	return data;
}

WRITE8_MEMBER( v1050_state::misc_ppi_pc_w )
{
	/*

        bit     signal      description

        PC0     pr_strobe   printer strobe
        PC1     f_int_enb   floppy interrupt enable
        PC2     baud_sel_a
        PC3     baud_sel_b
        PC4     pr_busy*    printer busy
        PC5     pr_pe*      printer paper end
        PC6
        PC7

    */

	// printer strobe
	m_centronics->strobe_w(BIT(data, 0));

	// floppy interrupt enable
	m_f_int_enb = BIT(data, 1);
	update_fdc();

	// baud select
	int baud_sel = (data >> 2) & 0x03;

	if (baud_sel != m_baud_sel)
	{
		attotime period = attotime::never;

		switch (baud_sel)
		{
		case 0:	period = attotime::from_hz((double)XTAL_16MHz/4/13/16); break;
		case 1:	period = attotime::from_hz((double)XTAL_16MHz/4/13/8); break;
		case 2:	period = attotime::from_hz((double)XTAL_16MHz/4/8); break;
		case 3:	period = attotime::from_hz((double)XTAL_16MHz/4/13/2); break;
		}

		m_timer_sio->adjust(attotime::zero, 0, period);

		m_baud_sel = baud_sel;
	}
}

static I8255A_INTERFACE( misc_ppi_intf )
{
	DEVCB_NULL,							// Port A read
	DEVCB_DRIVER_MEMBER(v1050_state, misc_ppi_pa_w),		// Port A write
	DEVCB_NULL,							// Port B read
	DEVCB_DRIVER_MEMBER(v1050_state,misc_ppi_pb_w),		// Port B write
	DEVCB_DRIVER_MEMBER(v1050_state,misc_ppi_pc_r),		// Port C read
	DEVCB_DRIVER_MEMBER(v1050_state, misc_ppi_pc_w)		// Port C write
};

// Real Time Clock 8255A Interface

WRITE8_MEMBER( v1050_state::rtc_ppi_pb_w )
{
	/*

        bit     signal      description

        PB0                 RS-232
        PB1                 Winchester
        PB2                 keyboard
        PB3                 floppy disk interrupt
        PB4                 vertical interrupt
        PB5                 display interrupt
        PB6                 expansion B
        PB7                 expansion A

    */

	m_int_mask = data;
}

READ8_MEMBER( v1050_state::rtc_ppi_pc_r )
{
	/*

        bit     signal      description

        PC0
        PC1
        PC2
        PC3                 clock busy
        PC4
        PC5
        PC6
        PC7

    */

	return m_rtc->busy_r() << 3;
}

WRITE8_MEMBER( v1050_state::rtc_ppi_pc_w )
{
	/*

        bit     signal      description

        PC0
        PC1
        PC2
        PC3
        PC4                 clock address write
        PC5                 clock data write
        PC6                 clock data read
        PC7                 clock device select

    */

	m_rtc->address_write_w(BIT(data, 4));
	m_rtc->write_w(BIT(data, 5));
	m_rtc->read_w(BIT(data, 6));
	m_rtc->cs2_w(BIT(data, 7));
}

static I8255A_INTERFACE( rtc_ppi_intf )
{
	DEVCB_DEVICE_MEMBER(MSM58321RS_TAG, msm58321_device, read),
	DEVCB_DEVICE_MEMBER(MSM58321RS_TAG, msm58321_device, write),
	DEVCB_NULL,
	DEVCB_DRIVER_MEMBER(v1050_state, rtc_ppi_pb_w),
	DEVCB_DRIVER_MEMBER(v1050_state, rtc_ppi_pc_r),
	DEVCB_DRIVER_MEMBER(v1050_state, rtc_ppi_pc_w)
};

// Keyboard 8251A Interface

TIMER_DEVICE_CALLBACK_MEMBER(v1050_state::kb_8251_tick)
{
	m_uart_kb->transmit_clock();
	m_uart_kb->receive_clock();
}

WRITE_LINE_MEMBER( v1050_state::kb_rxrdy_w )
{
	set_interrupt(INT_KEYBOARD, state);
}

static const i8251_interface kb_8251_intf =
{
	DEVCB_DEVICE_LINE_MEMBER(V1050_KEYBOARD_TAG, v1050_keyboard_device, so_r),
	DEVCB_DEVICE_LINE_MEMBER(V1050_KEYBOARD_TAG, v1050_keyboard_device, si_w),
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_DRIVER_LINE_MEMBER(v1050_state, kb_rxrdy_w),
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL
};

// Serial 8251A Interface

TIMER_DEVICE_CALLBACK_MEMBER(v1050_state::sio_8251_tick)
{
	m_uart_sio->transmit_clock();
	m_uart_sio->receive_clock();
}

WRITE_LINE_MEMBER( v1050_state::sio_rxrdy_w )
{
	m_rxrdy = state;

	set_interrupt(INT_RS_232, m_rxrdy || m_txrdy);
}

WRITE_LINE_MEMBER( v1050_state::sio_txrdy_w )
{
	m_txrdy = state;

	set_interrupt(INT_RS_232, m_rxrdy || m_txrdy);
}

static const i8251_interface sio_8251_intf =
{
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_DRIVER_LINE_MEMBER(v1050_state, sio_rxrdy_w),
	DEVCB_DRIVER_LINE_MEMBER(v1050_state, sio_txrdy_w),
	DEVCB_NULL,
	DEVCB_NULL
};

// MB8877 Interface

void v1050_state::update_fdc()
{
	if (m_f_int_enb)
	{
		set_interrupt(INT_FLOPPY, m_fdc_irq ? 1 : 0);
		m_maincpu->set_input_line(INPUT_LINE_NMI, m_fdc_drq ? ASSERT_LINE : CLEAR_LINE);
	}
	else
	{
		set_interrupt(INT_FLOPPY, 0);
		m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
	}
}

static SLOT_INTERFACE_START( v1050_floppies )
	SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) // Teac FD-55F
SLOT_INTERFACE_END

void v1050_state::fdc_intrq_w(bool state)
{
	m_fdc_irq = state;

	update_fdc();
}

void v1050_state::fdc_drq_w(bool state)
{
	m_fdc_drq = state;

	update_fdc();
}

/*
static LEGACY_FLOPPY_OPTIONS_START( v1050 )
    LEGACY_FLOPPY_OPTION( v1050, "dsk", "Visual 1050 disk image", basicdsk_identify_default, basicdsk_construct_default, NULL,
        HEADS([1])
        TRACKS([80])
        SECTORS([10])
        SECTOR_LENGTH([512])
        FIRST_SECTOR_ID([1]))
LEGACY_FLOPPY_OPTIONS_END
*/

// Machine Initialization

static IRQ_CALLBACK( v1050_int_ack )
{
	v1050_state *state = device->machine().driver_data<v1050_state>();

	UINT8 vector = 0xf0 | (state->m_pic->a_r() << 1);

	//logerror("Interrupt Acknowledge Vector: %02x\n", vector);

	state->m_maincpu->set_input_line(INPUT_LINE_IRQ0, CLEAR_LINE);

	return vector;
}

void v1050_state::machine_start()
{
	address_space &program = m_maincpu->space(AS_PROGRAM);

	// floppy callbacks
	m_fdc->setup_intrq_cb(wd_fdc_t::line_cb(FUNC(v1050_state::fdc_intrq_w), this));
	m_fdc->setup_drq_cb(wd_fdc_t::line_cb(FUNC(v1050_state::fdc_drq_w), this));

	// initialize I8214
	m_pic->etlg_w(1);
	m_pic->inte_w(1);

	// initialize RTC
	m_rtc->cs1_w(1);

	// set CPU interrupt callback
	m_maincpu->set_irq_acknowledge_callback(v1050_int_ack);

	// setup memory banking
	UINT8 *ram = machine().device<ram_device>(RAM_TAG)->pointer();

	membank("bank1")->configure_entries(0, 2, ram, 0x10000);
	membank("bank1")->configure_entry(2, ram + 0x1c000);
	membank("bank1")->configure_entry(3, memregion(Z80_TAG)->base());

	program.install_readwrite_bank(0x2000, 0x3fff, "bank2");
	membank("bank2")->configure_entries(0, 2, ram + 0x2000, 0x10000);
	membank("bank2")->configure_entry(2, ram + 0x1e000);

	program.install_readwrite_bank(0x4000, 0x7fff, "bank3");
	membank("bank3")->configure_entries(0, 2, ram + 0x4000, 0x10000);

	program.install_readwrite_bank(0x8000, 0xbfff, "bank4");
	membank("bank4")->configure_entries(0, 2, ram + 0x8000, 0x10000);

	program.install_readwrite_bank(0xc000, 0xffff, "bank5");
	membank("bank5")->configure_entries(0, 3, ram + 0xc000, 0);

	bankswitch();

	// register for state saving
	save_item(NAME(m_int_mask));
	save_item(NAME(m_int_state));
	save_item(NAME(m_f_int_enb));
	save_item(NAME(m_fdc_irq));
	save_item(NAME(m_fdc_drq));
	save_item(NAME(m_keylatch));
	save_item(NAME(m_keydata));
	save_item(NAME(m_keyavail));
	save_item(NAME(m_rxrdy));
	save_item(NAME(m_txrdy));
	save_item(NAME(m_baud_sel));
	save_item(NAME(m_bank));
}

void v1050_state::machine_reset()
{
	m_bank = 0;
	bankswitch();

	m_timer_sio->adjust(attotime::zero, 0, attotime::from_hz((double)XTAL_16MHz/4/13/16));

	m_fdc->reset();
}

// Machine Driver

static MACHINE_CONFIG_START( v1050, v1050_state )
	// basic machine hardware
    MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_16MHz/4)
    MCFG_CPU_PROGRAM_MAP(v1050_mem)
    MCFG_CPU_IO_MAP(v1050_io)
	MCFG_QUANTUM_PERFECT_CPU(Z80_TAG)

    MCFG_CPU_ADD(M6502_TAG, M6502, XTAL_15_36MHz/16)
    MCFG_CPU_PROGRAM_MAP(v1050_crt_mem)
	MCFG_QUANTUM_PERFECT_CPU(M6502_TAG)

	// keyboard HACK
	MCFG_TIMER_DRIVER_ADD_PERIODIC("keyboard", v1050_state, v1050_keyboard_tick, attotime::from_hz(60))

    // video hardware
	MCFG_FRAGMENT_ADD(v1050_video)

	// devices
	MCFG_I8214_ADD(UPB8214_TAG, XTAL_16MHz/4, pic_intf)
	MCFG_MSM58321_ADD(MSM58321RS_TAG, XTAL_32_768kHz, rtc_intf)
	MCFG_I8255A_ADD(I8255A_DISP_TAG, disp_ppi_intf)
	MCFG_I8255A_ADD(I8255A_MISC_TAG, misc_ppi_intf)
	MCFG_I8255A_ADD(I8255A_RTC_TAG, rtc_ppi_intf)
	MCFG_I8255A_ADD(I8255A_M6502_TAG, m6502_ppi_intf)
	MCFG_I8251_ADD(I8251A_KB_TAG, /*XTAL_16MHz/8,*/ kb_8251_intf)
	MCFG_I8251_ADD(I8251A_SIO_TAG, /*XTAL_16MHz/8,*/ sio_8251_intf)
	MCFG_MB8877x_ADD(MB8877_TAG, XTAL_16MHz/16)
	MCFG_FLOPPY_DRIVE_ADD(MB8877_TAG":0", v1050_floppies, "525dd", NULL, floppy_image_device::default_floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD(MB8877_TAG":1", v1050_floppies, "525dd", NULL, floppy_image_device::default_floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD(MB8877_TAG":2", v1050_floppies, NULL,    NULL, floppy_image_device::default_floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD(MB8877_TAG":3", v1050_floppies, NULL,    NULL, floppy_image_device::default_floppy_formats)
	MCFG_TIMER_DRIVER_ADD_PERIODIC(TIMER_KB_TAG, v1050_state, kb_8251_tick, attotime::from_hz((double)XTAL_16MHz/4/13/8))
	MCFG_TIMER_DRIVER_ADD(TIMER_SIO_TAG, v1050_state, sio_8251_tick)

	// SASI bus
	MCFG_SCSIBUS_ADD(SASIBUS_TAG)
	MCFG_SCSIDEV_ADD(SASIBUS_TAG ":harddisk0", S1410, SCSI_ID_0)
	MCFG_SCSICB_ADD(SASIBUS_TAG ":host")
	MCFG_SCSICB_IO_HANDLER(DEVWRITELINE(DEVICE_SELF_OWNER, v1050_state, sasi_io_w))

	MCFG_TIMER_DRIVER_ADD(TIMER_ACK_TAG, v1050_state, sasi_ack_tick)
	MCFG_TIMER_DRIVER_ADD(TIMER_RST_TAG, v1050_state, sasi_rst_tick)

	// keyboard
	MCFG_V1050_KEYBOARD_ADD()

	// software lists
	MCFG_SOFTWARE_LIST_ADD("disk_list","v1050")

	// printer
	MCFG_CENTRONICS_PRINTER_ADD(CENTRONICS_TAG, standard_centronics)

	// internal ram
	MCFG_RAM_ADD(RAM_TAG)
	MCFG_RAM_DEFAULT_SIZE("128K")
MACHINE_CONFIG_END

// ROMs

ROM_START( v1050 )
	ROM_REGION( 0x10000, Z80_TAG, 0 )
	ROM_LOAD( "e244-032 rev 1.2.u86", 0x0000, 0x2000, CRC(46f847a7) SHA1(374db7a38a9e9230834ce015006e2f1996b9609a) )

	ROM_REGION( 0x10000, M6502_TAG, 0 )
	ROM_LOAD( "e244-033 rev 1.1.u77", 0xe000, 0x2000, CRC(c0502b66) SHA1(bc0015f5b14f98110e652eef9f7c57c614683be5) )
ROM_END

// System Drivers

//    YEAR  NAME    PARENT  COMPAT  MACHINE INPUT   INIT    COMPANY                     FULLNAME        FLAGS
COMP( 1983, v1050,	0,		0,		v1050,	v1050, driver_device,	0,		"Visual Technology Inc",	"Visual 1050",	GAME_IMPERFECT_GRAPHICS | GAME_SUPPORTS_SAVE | GAME_NO_SOUND | GAME_IMPERFECT_KEYBOARD )