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path: root/src/mess/drivers/homelab.c
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// license:MAME
// copyright-holders:Miodrag Milanovic, Robbbert
/***************************************************************************

    Homelab driver by Miodrag Milanovic

    31/08/2008 Preliminary driver.
    15/06/2012 Various updates [Robbbert]

    The emulator called HoLa! works fine, but it is closed source.
    You can get HoLa! at: http://gaia.atilia.eu

    ToDO:
    - HTP files should be a cassette format, not a quickload.
    - Quickloads cause the emulated machine to hang or reboot.
    - homelab2 - cassette to fix.
                 Note that rom code 0x40-48 is meaningless garbage,
                 had to patch to stop it crashing. Need a new dump.
    - homelab3/4 - Need a dump of the TM188 prom.
                 cassette to fix.
                 up to 64k ram can be fitted. schematic only shows 16k.
                 Z80PIO - expansion only, doesn't do anything in the
                 machine. /CE connects to A6, A/B = A0, C/D = A1.
                 The bios never talks to it. Official port numbers
                 are 3C-3F.
    - Brailab4 - same as homelab3.
    - Braiplus - no work has been done. Needs to be developed from scratch.


TM188 is (it seems) equivalent to 27S19, TBP18S030N, 6331-1, 74S288, 82S123,
MB7051 - fuse programmed prom.

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "sound/speaker.h"
#include "sound/wave.h"
#include "imagedev/cassette.h"
#include "audio/mea8000.h"
#include "sound/dac.h"
#include "imagedev/snapquik.h"



class homelab_state : public driver_device
{
public:
	homelab_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
	m_maincpu(*this, "maincpu"),
	m_speaker(*this, "speaker"),
	m_cass(*this, "cassette")
	{ }

	DECLARE_READ8_MEMBER(key_r);
	DECLARE_WRITE8_MEMBER(cass_w);
	DECLARE_READ8_MEMBER(cass2_r);
	DECLARE_READ8_MEMBER(exxx_r);
	DECLARE_WRITE8_MEMBER(port7f_w);
	DECLARE_WRITE8_MEMBER(portff_w);
	DECLARE_WRITE8_MEMBER(brailab4_port7f_w);
	DECLARE_WRITE8_MEMBER(brailab4_portff_w);
	DECLARE_CUSTOM_INPUT_MEMBER(cass3_r);
	const UINT8 *m_p_chargen;
	const UINT8 *m_p_videoram;
	bool m_nmi;
	required_device<cpu_device> m_maincpu;
	required_device<speaker_sound_device> m_speaker;
	required_device<cassette_image_device> m_cass;
	DECLARE_DRIVER_INIT(brailab4);
	DECLARE_VIDEO_START(homelab2);
	DECLARE_MACHINE_RESET(homelab3);
	DECLARE_VIDEO_START(homelab3);
	DECLARE_MACHINE_RESET(brailab4);
	DECLARE_VIDEO_START(brailab4);
	UINT32 screen_update_homelab2(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	UINT32 screen_update_homelab3(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	INTERRUPT_GEN_MEMBER(homelab_frame);
	DECLARE_QUICKLOAD_LOAD_MEMBER(homelab);
};

INTERRUPT_GEN_MEMBER(homelab_state::homelab_frame)
{
	if (m_nmi)
		m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
}

READ8_MEMBER( homelab_state::key_r ) // offset 27F-2FE
{
	if (offset == 0x38) // 0x3838
	{
		m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
		return 0;
	}

	UINT8 i,data = 0xff;
	char kbdrow[8];

	for (i=0; i<8; i++)
	{
		if (!BIT(offset, i))
		{
			sprintf(kbdrow,"LINE%d", i);
			data &= ioport(kbdrow)->read();
		}
	}

	return data;
}

READ8_MEMBER( homelab_state::cass2_r )
{
	return (m_cass->input() > 0.03) ? 0xff : 0;
}

WRITE8_MEMBER( homelab_state::cass_w )
{
	if (offset == 0x73f) // 0x3f3f
		m_nmi = true;
	else
	if (offset == 0x63e) // 0x3e3e
		m_nmi = false;
	else
	if (offset == 0x400) // 0x3c00
		m_cass->output(BIT(data, 0) ? -1.0 : +1.0); // FIXME
}

MACHINE_RESET_MEMBER(homelab_state,homelab3)
{
}

MACHINE_RESET_MEMBER(homelab_state,brailab4)
{
	membank("bank1")->set_entry(0);
}

WRITE8_MEMBER( homelab_state::port7f_w )
{
}

WRITE8_MEMBER( homelab_state::portff_w )
{
}

WRITE8_MEMBER( homelab_state::brailab4_port7f_w )
{
	membank("bank1")->set_entry(0);
}

WRITE8_MEMBER( homelab_state::brailab4_portff_w )
{
	membank("bank1")->set_entry(1);
}

CUSTOM_INPUT_MEMBER( homelab_state::cass3_r )
{
	return (m_cass->input() > 0.03);
}


READ8_MEMBER( homelab_state::exxx_r )
{
// keys E800-E813 but E810-E813 are not connected
// cassin E883
// speaker/cass toggle E880, E802


	if (offset == 0x83)
		return (m_cass->input() > 0.03);
	else
	if (offset == 0x80)
	{
		m_speaker->level_w(0);
		m_cass->output(-1.0);
	}
	else
	if (offset == 0x02)
	{
		m_speaker->level_w(1);
		m_cass->output(+1.0);
	}

	char kbdrow[8];
	UINT8 data = 0xff;
	if (offset < 0x10)
	{
		sprintf(kbdrow,"X%X", offset);
		data = ioport(kbdrow)->read();
	}
	return data;
}


/* Address maps */
static ADDRESS_MAP_START(homelab2_mem, AS_PROGRAM, 8, homelab_state)
	AM_RANGE( 0x0000, 0x07ff ) AM_ROM  // ROM 1
	AM_RANGE( 0x0800, 0x0fff ) AM_ROM  // ROM 2
	AM_RANGE( 0x1000, 0x17ff ) AM_ROM  // ROM 3
	AM_RANGE( 0x1800, 0x1fff ) AM_ROM  // ROM 4
	AM_RANGE( 0x2000, 0x27ff ) AM_ROM  // ROM 5
	AM_RANGE( 0x2800, 0x2fff ) AM_ROM  // ROM 6
	AM_RANGE( 0x3000, 0x37ff ) AM_ROM  // Empty
	AM_RANGE( 0x3800, 0x3fff ) AM_READWRITE(key_r,cass_w)
	AM_RANGE( 0x4000, 0x7fff ) AM_RAM
	AM_RANGE( 0xc000, 0xc3ff ) AM_RAM AM_REGION("maincpu",0xc000)
	AM_RANGE( 0xe000, 0xe0ff ) AM_READ(cass2_r)
ADDRESS_MAP_END

static ADDRESS_MAP_START(homelab3_mem, AS_PROGRAM, 8, homelab_state)
	AM_RANGE( 0x0000, 0x3fff ) AM_ROM
	AM_RANGE( 0x4000, 0x7fff ) AM_RAM
	AM_RANGE( 0xe800, 0xefff ) AM_READ(exxx_r)
	AM_RANGE( 0xf800, 0xffff ) AM_RAM AM_REGION("maincpu",0xf800)
ADDRESS_MAP_END

static ADDRESS_MAP_START(homelab3_io, AS_IO, 8, homelab_state)
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE( 0x7f, 0x7f ) AM_WRITE(port7f_w)
	AM_RANGE( 0xff, 0xff ) AM_WRITE(portff_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START(brailab4_mem, AS_PROGRAM, 8, homelab_state)
	AM_RANGE( 0x0000, 0x3fff ) AM_ROM
	AM_RANGE( 0x4000, 0xcfff ) AM_RAM
	AM_RANGE( 0xd000, 0xdfff ) AM_ROM
	AM_RANGE( 0xe800, 0xefff ) AM_READ(exxx_r)
	AM_RANGE( 0xf800, 0xffff ) AM_RAMBANK("bank1")
ADDRESS_MAP_END

static ADDRESS_MAP_START(brailab4_io, AS_IO, 8, homelab_state)
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE( 0xf8, 0xf9 ) AM_DEVREADWRITE("mea8000", mea8000_device, read, write)
	AM_RANGE( 0x7f, 0x7f ) AM_WRITE(brailab4_port7f_w)
	AM_RANGE( 0xff, 0xff ) AM_WRITE(brailab4_portff_w)
ADDRESS_MAP_END



/* Input ports */
static INPUT_PORTS_START( homelab )
	PORT_START("LINE0")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left Shift")  PORT_CODE(KEYCODE_LSHIFT) //PORT_CHAR(UCHAR_SHIFT_1)
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right Shift") PORT_CODE(KEYCODE_RSHIFT)
	PORT_BIT(0xfc, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("LINE1")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Up") PORT_CODE(KEYCODE_UP)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Home") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME))
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Tab") PORT_CODE(KEYCODE_TAB) PORT_CHAR(9)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Run/Brk") PORT_CODE(KEYCODE_RCONTROL)

	PORT_START("LINE2")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('<')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')

	PORT_START("LINE3")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(':') PORT_CHAR('*')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR('<') 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_STOP) PORT_CHAR('>') PORT_CHAR('.')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('?') PORT_CHAR('/')

	PORT_START("LINE4")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('@')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
	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_D) PORT_CHAR('D')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('G')

	PORT_START("LINE5")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('H')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('I')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('J')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('K')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('L')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('M')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('N')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('O')

	PORT_START("LINE6")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('P')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('R')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('S')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('T')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('U')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('V')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('W')

	PORT_START("LINE7")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('^')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RALT) PORT_CODE(KEYCODE_LALT) PORT_CHAR('_')
INPUT_PORTS_END

static INPUT_PORTS_START( homelab3 ) // F4 to F8 are foreign characters
	PORT_START("X0")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN)
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Up") PORT_CODE(KEYCODE_UP)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X1")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) // A
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) // D
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X2")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_CUSTOM)   PORT_VBLANK("screen")
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left Shift")  PORT_CODE(KEYCODE_LSHIFT)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right Shift") PORT_CODE(KEYCODE_RSHIFT)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ALT") PORT_CODE(KEYCODE_CAPSLOCK)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X3")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, homelab_state, cass3_r, " ")
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1)
	PORT_BIT(0xf8, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X4")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X5")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X6")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(':') PORT_CHAR('*')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X7")
	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_MINUS) PORT_CHAR('=') PORT_CHAR('-')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('?') PORT_CHAR('/')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X8")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('@')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F4)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X9")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
	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_F5)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XA")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('G')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('H')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('I')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XB")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('J')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('K')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('L')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('M')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XC")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('N')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('O')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F6)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F7)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XD")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('P')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('R')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('S')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XE")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('T')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('U')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F8)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('V')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XF")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('W')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)
INPUT_PORTS_END

static INPUT_PORTS_START( brailab4 ) // F4 to F8 are foreign characters
	PORT_START("X0")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Up") PORT_CODE(KEYCODE_UP)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X1")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) // A
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) // D
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X2")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_CUSTOM)   PORT_VBLANK("screen")
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left Shift")  PORT_CODE(KEYCODE_LSHIFT)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right Shift") PORT_CODE(KEYCODE_RSHIFT)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ALT") PORT_CODE(KEYCODE_CAPSLOCK)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X3")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, homelab_state, cass3_r, " ")
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1)
	PORT_BIT(0xf8, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X4")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X5")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X6")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(':') PORT_CHAR('*')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X7")
	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_MINUS) PORT_CHAR('=') PORT_CHAR('-')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('?') PORT_CHAR('/')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X8")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('@')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F4)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("X9")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
	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_F5)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XA")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('G')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('H')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('I')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XB")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('J')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('K')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('L')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('M')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XC")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('N')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('O')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F6)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F7)
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XD")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('P')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('R')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('S')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XE")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('T')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('U')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F8)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('V')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)

	PORT_START("XF")
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('W')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
	PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED)
INPUT_PORTS_END

VIDEO_START_MEMBER(homelab_state,homelab2)
{
	m_p_chargen = memregion("chargen")->base();
	m_p_videoram = memregion("maincpu")->base()+0xc000;
}

VIDEO_START_MEMBER(homelab_state,homelab3)
{
	m_p_chargen = memregion("chargen")->base();
	m_p_videoram = memregion("maincpu")->base()+0xf800;
}

VIDEO_START_MEMBER(homelab_state,brailab4)
{
	m_p_chargen = memregion("chargen")->base();
	m_p_videoram = memregion("maincpu")->base()+0x17800;
}

UINT32 homelab_state::screen_update_homelab2(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	UINT8 y,ra,chr,gfx;
	UINT16 sy=0,ma=0,x;

	for(y = 0; y < 25; y++ )
	{
		for (ra = 0; ra < 8; ra++)
		{
			UINT16 *p = &bitmap.pix16(sy++);

			for (x = ma; x < ma + 40; x++)
			{
				chr = m_p_videoram[x]; // get char in videoram
				gfx = m_p_chargen[chr | (ra<<8)]; // get dot pattern in chargen

				/* Display a scanline of a character */
				*p++ = BIT(gfx, 7);
				*p++ = BIT(gfx, 6);
				*p++ = BIT(gfx, 5);
				*p++ = BIT(gfx, 4);
				*p++ = BIT(gfx, 3);
				*p++ = BIT(gfx, 2);
				*p++ = BIT(gfx, 1);
				*p++ = BIT(gfx, 0);
			}
		}
		ma+=40;
	}
	return 0;
}

UINT32 homelab_state::screen_update_homelab3(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	UINT8 y,ra,chr,gfx;
	UINT16 sy=0,ma=0,x;

	for(y = 0; y < 32; y++ )
	{
		for (ra = 0; ra < 8; ra++)
		{
			UINT16 *p = &bitmap.pix16(sy++);

			for (x = ma; x < ma + 64; x++)
			{
				chr = m_p_videoram[x]; // get char in videoram
				gfx = m_p_chargen[chr | (ra<<8)]; // get dot pattern in chargen

				/* Display a scanline of a character */
				*p++ = BIT(gfx, 7);
				*p++ = BIT(gfx, 6);
				*p++ = BIT(gfx, 5);
				*p++ = BIT(gfx, 4);
				*p++ = BIT(gfx, 3);
				*p++ = BIT(gfx, 2);
				*p++ = BIT(gfx, 1);
				*p++ = BIT(gfx, 0);
			}
		}
		ma+=64;
	}
	return 0;
}

/* F4 Character Displayer */
static const gfx_layout homelab_charlayout =
{
	8, 8,                   /* 8 x 8 characters */
	256,                    /* 256 characters */
	1,                  /* 1 bits per pixel */
	{ 0 },                  /* no bitplanes */
	/* x offsets */
	{ 0, 1, 2, 3, 4, 5, 6, 7 },
	/* y offsets */
	{ 0, 1*256*8, 2*256*8, 3*256*8, 4*256*8, 5*256*8, 6*256*8, 7*256*8 },
	8                   /* every char takes 8 x 1 bytes */
};

static GFXDECODE_START( homelab )
	GFXDECODE_ENTRY( "chargen", 0x0000, homelab_charlayout, 0, 1 )
GFXDECODE_END

QUICKLOAD_LOAD_MEMBER( homelab_state,homelab)
{
	address_space &space = m_maincpu->space(AS_PROGRAM);
	int i=0;
	UINT8 ch;
	UINT16 quick_addr;
	UINT16 quick_length;
	UINT16 quick_end;
	dynamic_buffer quick_data;
	char pgmname[256];
	UINT16 args[2];
	int read_;

	quick_length = image.length();
	quick_data.resize(quick_length);

	read_ = image.fread( quick_data, quick_length);
	if (read_ != quick_length)
	{
		image.seterror(IMAGE_ERROR_INVALIDIMAGE, "Cannot read the file");
		image.message(" Cannot read the file");
		return IMAGE_INIT_FAIL;
	}

	image.fseek(0x100, SEEK_SET);
	ch = image.fgetc();
	if (ch != 0xA5)
	{
		image.seterror(IMAGE_ERROR_INVALIDIMAGE, "Invalid header");
		image.message(" Invalid header");
		return IMAGE_INIT_FAIL;
	}

	while((ch = image.fgetc()))
	{
		if (i >= (ARRAY_LENGTH(pgmname) - 1))
		{
			image.seterror(IMAGE_ERROR_INVALIDIMAGE, "File name too long");
			image.message(" File name too long");
			return IMAGE_INIT_FAIL;
		}

		pgmname[i] = ch;    /* build program name */
		i++;
	}

	pgmname[i] = '\0';  /* terminate string with a null */

	if (image.fread(args, sizeof(args)) != sizeof(args))
	{
		image.seterror(IMAGE_ERROR_INVALIDIMAGE, "Unexpected EOF while getting file size");
		image.message(" Unexpected EOF while getting file size");
		return IMAGE_INIT_FAIL;
	}

	quick_addr = LITTLE_ENDIANIZE_INT16(args[0]);
	quick_length = LITTLE_ENDIANIZE_INT16(args[1]);
	quick_end = quick_addr+quick_length-1;

	if (quick_end > 0x7fff)
	{
		image.seterror(IMAGE_ERROR_INVALIDIMAGE, "File too large");
		image.message(" File too large");
		return IMAGE_INIT_FAIL;
	}

	/* display a message about the loaded quickload */
	image.message(" %s\nsize=%04X : start=%04X : end=%04X",pgmname,quick_length,quick_addr,quick_end);

	for (i = 0; i < quick_length; i++)
	{
		int j = (quick_addr + i);
		if (image.fread(&ch, 1) != 1)
		{
			char message[256];
			snprintf(message, ARRAY_LENGTH(message), "%s: Unexpected EOF while writing byte to %04X", pgmname, (unsigned) j);
			image.seterror(IMAGE_ERROR_INVALIDIMAGE, message);
			image.message("%s: Unexpected EOF while writing byte to %04X", pgmname, (unsigned) j);
			return IMAGE_INIT_FAIL;
		}
		space.write_byte(j, ch);
	}

	return IMAGE_INIT_PASS;
}

/* Machine driver */
static MACHINE_CONFIG_START( homelab, homelab_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, XTAL_8MHz / 2)
	MCFG_CPU_PROGRAM_MAP(homelab2_mem)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", homelab_state,  homelab_frame)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(50)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
	MCFG_SCREEN_SIZE(40*8, 25*8)
	MCFG_SCREEN_VISIBLE_AREA(0, 40*8-1, 0, 25*8-1)
	MCFG_VIDEO_START_OVERRIDE(homelab_state,homelab2)
	MCFG_SCREEN_UPDATE_DRIVER(homelab_state, screen_update_homelab2)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", homelab)
	MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
	MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)

	MCFG_CASSETTE_ADD( "cassette" )
	MCFG_QUICKLOAD_ADD("quickload", homelab_state, homelab, "htp", 2)
MACHINE_CONFIG_END

static MACHINE_CONFIG_START( homelab3, homelab_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, XTAL_12MHz / 4)
	MCFG_CPU_PROGRAM_MAP(homelab3_mem)
	MCFG_CPU_IO_MAP(homelab3_io)
	MCFG_MACHINE_RESET_OVERRIDE(homelab_state,homelab3)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(50)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
	MCFG_SCREEN_SIZE(64*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0, 64*8-1, 0, 32*8-1)
	MCFG_VIDEO_START_OVERRIDE(homelab_state,homelab3)
	MCFG_SCREEN_UPDATE_DRIVER(homelab_state, screen_update_homelab3)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", homelab)
	MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
	MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)

	MCFG_CASSETTE_ADD( "cassette" )
	MCFG_QUICKLOAD_ADD("quickload", homelab_state, homelab, "htp", 2)
MACHINE_CONFIG_END

static MACHINE_CONFIG_START( brailab4, homelab_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, XTAL_12MHz / 4)
	MCFG_CPU_PROGRAM_MAP(brailab4_mem)
	MCFG_CPU_IO_MAP(brailab4_io)
	MCFG_MACHINE_RESET_OVERRIDE(homelab_state,brailab4)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(50)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
	MCFG_SCREEN_SIZE(64*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0, 64*8-1, 0, 32*8-1)
	MCFG_VIDEO_START_OVERRIDE(homelab_state,brailab4)
	MCFG_SCREEN_UPDATE_DRIVER(homelab_state, screen_update_homelab3)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", homelab)
	MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
	MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
	MCFG_SOUND_ADD ( "speech", DAC, 0 )
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
	MCFG_DEVICE_ADD("mea8000", MEA8000, 0)
	MCFG_MEA8000_DAC("speech")

	MCFG_CASSETTE_ADD( "cassette" )
	MCFG_QUICKLOAD_ADD("quickload", homelab_state, homelab, "htp", 18)
MACHINE_CONFIG_END

DRIVER_INIT_MEMBER(homelab_state,brailab4)
{
	UINT8 *RAM = memregion("maincpu")->base();
	membank("bank1")->configure_entries(0, 2, &RAM[0xf800], 0x8000);
}

/* ROM definition */

ROM_START( homelab2 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "hl2_1.rom", 0x0000, 0x0800, BAD_DUMP CRC(205365F7) SHA1(da93b65befd83513dc762663b234227ba804124d))
	ROM_LOAD( "hl2_2.rom", 0x0800, 0x0800, CRC(696AF3C1) SHA1(b53bc6ae2b75975618fc90e7181fa5d21409fce1))
	ROM_LOAD( "hl2_3.rom", 0x1000, 0x0800, CRC(69E57E8C) SHA1(e98510abb715dbf513e1b29fb6b09ab54e9483b7))
	ROM_LOAD( "hl2_4.rom", 0x1800, 0x0800, CRC(97CBBE74) SHA1(34f0bad41302b059322018abc3d1c2336ecfbea8))
	ROM_LOAD( "hl2_m.rom", 0x2000, 0x0800, CRC(10040235) SHA1(e121dfb97cc8ea99193a9396a9f7af08585e0ff0) )
	ROM_FILL(0x46, 1, 0x18) // fix bad code
	ROM_FILL(0x47, 1, 0x0E)

	ROM_REGION(0x0800, "chargen",0)
	ROM_LOAD( "hl2.chr", 0x0000, 0x0800, CRC(2E669D40) SHA1(639dd82ed29985dc69830aca3b904b6acc8fe54a))
	// found on net, looks like bad dump
	//ROM_LOAD_OPTIONAL( "hl2_ch.rom", 0x0800, 0x1000, CRC(6a5c915a) SHA1(7e4e966358556c6aabae992f4c2b292b6aab59bd) )
ROM_END

ROM_START( homelab3 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "hl3_1.rom", 0x0000, 0x1000, CRC(6B90A8EA) SHA1(8ac40ca889b8c26cdf74ca309fbafd70dcfdfbec))
	ROM_LOAD( "hl3_2.rom", 0x1000, 0x1000, CRC(BCAC3C24) SHA1(aff371d17f61cb60c464998e092f04d5d85c4d52))
	ROM_LOAD( "hl3_3.rom", 0x2000, 0x1000, CRC(AB1B4AB0) SHA1(ad74c7793f5dc22061a88ef31d3407267ad08719))
	ROM_LOAD( "hl3_4.rom", 0x3000, 0x1000, CRC(BF67EFF9) SHA1(2ef5d46f359616e7d0e5a124df528de44f0e850b))

	ROM_REGION(0x0800, "chargen",0)
	ROM_LOAD( "hl3.chr", 0x0000, 0x0800, CRC(F58EE39B) SHA1(49399c42d60a11b218a225856da86a9f3975a78a))
ROM_END

ROM_START( homelab4 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "hl4_1.rom", 0x0000, 0x1000, CRC(A549B2D4) SHA1(90fc5595da8431616aee56eb5143b9f04281e798))
	ROM_LOAD( "hl4_2.rom", 0x1000, 0x1000, CRC(151D33E8) SHA1(d32004bc1553f802b9d3266709552f7d5315fe44))
	ROM_LOAD( "hl4_3.rom", 0x2000, 0x1000, CRC(39571AB1) SHA1(8470cff2e3442101e6a0bc655358b3a6fc1ef944))
	ROM_LOAD( "hl4_4.rom", 0x3000, 0x1000, CRC(F4B77CA2) SHA1(ffbdb3c1819c7357e2a0fc6317c111a8a7ecfcd5))

	ROM_REGION(0x0800, "chargen",0)
	ROM_LOAD( "hl4.chr", 0x0000, 0x0800, CRC(F58EE39B) SHA1(49399c42d60a11b218a225856da86a9f3975a78a))
ROM_END

ROM_START( brailab4 )
	ROM_REGION( 0x18000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "brl1.rom", 0x0000, 0x1000, CRC(02323403) SHA1(3a2e853e0a39e05a04a8db58e1a76de1eda579c9))
	ROM_LOAD( "brl2.rom", 0x1000, 0x1000, CRC(36173fbc) SHA1(1c01398e16a1cbe4103e1be769347ceae873e090))
	ROM_LOAD( "brl3.rom", 0x2000, 0x1000, CRC(d3cdd108) SHA1(1a24e6c5f9c370ff6cb25045cb9d95e664467eb5))
	ROM_LOAD( "brl4.rom", 0x3000, 0x1000, CRC(d4047885) SHA1(00fe40c4c2c64a49bb429fb2b27cc7e0d0025a85))
	ROM_LOAD( "brl5.rom", 0xd000, 0x1000, CRC(8a76be04) SHA1(4b683b9be23b47117901fe874072eb7aa481e4ff))

	ROM_REGION(0x0800, "chargen",0)
	ROM_LOAD( "hl4.chr", 0x0000, 0x0800, CRC(F58EE39B) SHA1(49399c42d60a11b218a225856da86a9f3975a78a))

	// these roms were found on the net, to be investigated
	ROM_REGION( 0x5020, "user1", 0 )
	// brl1 to 5 merged, with small changes
	// 00BF: 28 18 87 -> 30 30 0c
	// 0138: 07 0a 06 0b -> 0c 06 07 0a (keyboard assignments)
	ROM_LOAD_OPTIONAL( "brl.rom",         0x0000, 0x5000, CRC(54af5d30) SHA1(d1e7b7f5866acba0503d47f610456f396526240b) )
	// a small prom
	ROM_LOAD_OPTIONAL( "brlcpm.rom",      0x5000, 0x0020, CRC(b936d568) SHA1(150330eccbc4b664eba4103f051d6e932038e9e8) )
ROM_END

ROM_START( braiplus )
	ROM_REGION( 0x18000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "brailabplus.bin", 0x0000, 0x4000, CRC(521d6952) SHA1(f7405520d86fc7abd2dec51d1d016658472f6fe8) )

	ROM_REGION(0x0800, "chargen",0) // no idea what chargen it uses
	ROM_LOAD( "hl4.chr", 0x0000, 0x0800, CRC(F58EE39B) SHA1(49399c42d60a11b218a225856da86a9f3975a78a))
ROM_END

/* Driver */

/*    YEAR  NAME        PARENT     COMPAT  MACHINE      INPUT      INIT       COMPANY                    FULLNAME   FLAGS */
COMP( 1982, homelab2,   0,         0,      homelab,     homelab, driver_device,   0,        "Jozsef and Endre Lukacs", "Homelab 2 / Aircomp 16", GAME_NOT_WORKING | GAME_NO_SOUND_HW )
COMP( 1983, homelab3,   homelab2,  0,      homelab3,    homelab3, driver_device,  0,        "Jozsef and Endre Lukacs", "Homelab 3", GAME_NOT_WORKING )
COMP( 1984, homelab4,   homelab2,  0,      homelab3,    homelab3, driver_device,  0,        "Jozsef and Endre Lukacs", "Homelab 4", GAME_NOT_WORKING )
COMP( 1984, brailab4,   homelab2,  0,      brailab4,    brailab4, homelab_state,  brailab4, "Jozsef and Endre Lukacs", "Brailab 4", GAME_NOT_WORKING )
COMP( 1988, braiplus,   homelab2,  0,      brailab4,    brailab4, homelab_state,  brailab4, "Jozsef and Endre Lukacs", "Brailab Plus", GAME_NOT_WORKING | GAME_IS_SKELETON )