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

        Psion Organiser II series

        Driver by Sandro Ronco

        TODO:
        - dump CGROM of the HD44780
        - emulate other devices in slot C(Comms Link, printer)

        Note:
        - 4 lines display has an custom LCD controller derived from an HD66780
        - NVRAM works only if the machine is turned off (with OFF menu) before closing MESS

        More info:
            http://archive.psion2.org/org2/techref/index.htm

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


#include "emu.h"
#include "includes/psion.h"
#include "rendlay.h"

TIMER_DEVICE_CALLBACK_MEMBER(psion_state::nmi_timer)
{
	if (m_enable_nmi)
		m_maincpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
}

UINT8 psion_state::kb_read()
{
	static const char *const bitnames[] = {"K1", "K2", "K3", "K4", "K5", "K6", "K7"};
	UINT8 line, data = 0x7c;

	if (m_kb_counter)
	{
		for (line = 0; line < 7; line++)
			if (m_kb_counter == (0x7f & ~(1 << line)))
				data = machine().root_device().ioport(bitnames[line])->read();
	}
	else
	{
		//Read all the input lines
		for (line = 0; line < 7; line++)
			data &= machine().root_device().ioport(bitnames[line])->read();
	}

	return data & 0x7c;
}

void psion_state::update_banks()
{
	if (m_ram_bank < m_ram_bank_count && m_ram_bank_count)
		membank("rambank")->set_entry(m_ram_bank);

	if (m_rom_bank < m_rom_bank_count && m_rom_bank_count)
		membank("rombank")->set_entry(m_rom_bank);
}

WRITE8_MEMBER( psion_state::hd63701_int_reg_w )
{
	switch (offset)
	{
	case 0x01:
		m_port2_ddr = data;
		break;
	case 0x03:
		/* datapack i/o data bus */
		m_pack1->data_w(data & m_port2_ddr);
		m_pack2->data_w(data & m_port2_ddr);
		break;
	case 0x08:
		m_tcsr_value = data;
		break;
	case 0x15:
		/* read-only */
		break;
	case 0x16:
		m_port6_ddr = data;
		break;
	case 0x17:
		/*
		datapack control lines
		x--- ---- slot on/off
		-x-- ---- slot 3
		--x- ---- slot 2
		---x ---- slot 1
		---- x--- output enable
		---- -x-- program line
		---- --x- reset line
		---- ---x clock line
		*/
		m_port6 = (data & m_port6_ddr) | (m_port6 & ~m_port6_ddr);

		m_pack1->control_w((m_port6 & 0x8f) | (m_port6 & 0x10));
		m_pack2->control_w((m_port6 & 0x8f) | ((m_port6 & 0x20) >> 1));
		break;
	}

	m_maincpu->m6801_io_w(space, offset, data);
}

READ8_MEMBER( psion_state::hd63701_int_reg_r )
{
	switch (offset)
	{
	case 0x03:
		/* datapack i/o data bus */
		return (m_pack1->data_r() | m_pack2->data_r()) & (~m_port2_ddr);
	case 0x14:
		return (m_maincpu->m6801_io_r(space, offset)&0x7f) | (m_stby_pwr<<7);
	case 0x15:
		/*
		x--- ---- ON key active high
		-xxx xx-- keys matrix active low
		---- --x- pulse
		---- ---x battery status
		*/
		return kb_read() | ioport("BATTERY")->read() | ioport("ON")->read() | (m_kb_counter == 0x7ff)<<1 | m_pulse<<1;
	case 0x17:
		/* datapack control lines */
		return (m_pack1->control_r() | (m_pack2->control_r() & 0x8f)) | ((m_pack2->control_r() & 0x10)<<1);
	case 0x08:
		m_maincpu->m6801_io_w(space, offset, m_tcsr_value);
	default:
		return m_maincpu->m6801_io_r(space, offset);
	}
}

/* Read/Write common */
void psion_state::io_rw(address_space &space, UINT16 offset)
{
	if (space.debugger_access())
		return;

	switch (offset & 0xffc0)
	{
	case 0xc0:
		/* switch off, CPU goes into standby mode */
		m_enable_nmi = 0;
		m_stby_pwr = 1;
		m_maincpu->suspend(SUSPEND_REASON_HALT, 1);
		break;
	case 0x100:
		m_pulse = 1;
		break;
	case 0x140:
		m_pulse = 0;
		break;
	case 0x200:
		m_kb_counter = 0;
		break;
	case 0x180:
		m_beep->set_state(1);
		break;
	case 0x1c0:
		m_beep->set_state(0);
		break;
	case 0x240:
		if (offset == 0x260 && (m_rom_bank_count || m_ram_bank_count))
		{
			m_ram_bank=0;
			m_rom_bank=0;
			update_banks();
		}
		else
			m_kb_counter++;
		break;
	case 0x280:
		if (offset == 0x2a0 && m_ram_bank_count)
		{
			m_ram_bank++;
			update_banks();
		}
		else
			m_enable_nmi = 1;
		break;
	case 0x2c0:
		if (offset == 0x2e0 && m_rom_bank_count)
		{
			m_rom_bank++;
			update_banks();
		}
		else
			m_enable_nmi = 0;
		break;
	}
}

WRITE8_MEMBER( psion_state::io_w )
{
	switch (offset & 0x0ffc0)
	{
	case 0x80:
		m_lcdc->write(space, offset & 0x01, data);
		break;
	default:
		io_rw(space, offset);
	}
}

READ8_MEMBER( psion_state::io_r )
{
	switch (offset & 0xffc0)
	{
	case 0x80:
		return m_lcdc->read(space, offset & 0x01);
	default:
		io_rw(space, offset);
	}

	return 0;
}

INPUT_CHANGED_MEMBER(psion_state::psion_on)
{
	/* reset the CPU for resume from standby */
	if (m_maincpu->suspended(SUSPEND_REASON_HALT))
		m_maincpu->reset();
}

static ADDRESS_MAP_START(psioncm_mem, AS_PROGRAM, 8, psion_state)
	ADDRESS_MAP_UNMAP_LOW
	AM_RANGE(0x0000, 0x001f) AM_READWRITE(hd63701_int_reg_r, hd63701_int_reg_w)
	AM_RANGE(0x0040, 0x00ff) AM_RAM AM_SHARE("sys_register")
	AM_RANGE(0x0100, 0x03ff) AM_READWRITE(io_r, io_w)
	AM_RANGE(0x2000, 0x3fff) AM_RAM AM_SHARE("ram")
	AM_RANGE(0x8000, 0xffff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START(psionla_mem, AS_PROGRAM, 8, psion_state)
	ADDRESS_MAP_UNMAP_LOW
	AM_RANGE(0x0000, 0x001f) AM_READWRITE(hd63701_int_reg_r, hd63701_int_reg_w)
	AM_RANGE(0x0040, 0x00ff) AM_RAM AM_SHARE("sys_register")
	AM_RANGE(0x0100, 0x03ff) AM_READWRITE(io_r, io_w)
	AM_RANGE(0x0400, 0x5fff) AM_RAM AM_SHARE("ram")
	AM_RANGE(0x8000, 0xffff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START(psionp350_mem, AS_PROGRAM, 8, psion_state)
	ADDRESS_MAP_UNMAP_LOW
	AM_RANGE(0x0000, 0x001f) AM_READWRITE(hd63701_int_reg_r, hd63701_int_reg_w)
	AM_RANGE(0x0040, 0x00ff) AM_RAM AM_SHARE("sys_register")
	AM_RANGE(0x0100, 0x03ff) AM_READWRITE(io_r, io_w)
	AM_RANGE(0x0400, 0x3fff) AM_RAM AM_SHARE("ram")
	AM_RANGE(0x4000, 0x7fff) AM_RAMBANK("rambank")
	AM_RANGE(0x8000, 0xffff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START(psionlam_mem, AS_PROGRAM, 8, psion_state)
	ADDRESS_MAP_UNMAP_LOW
	AM_RANGE(0x0000, 0x001f) AM_READWRITE(hd63701_int_reg_r, hd63701_int_reg_w)
	AM_RANGE(0x0040, 0x00ff) AM_RAM AM_SHARE("sys_register")
	AM_RANGE(0x0100, 0x03ff) AM_READWRITE(io_r, io_w)
	AM_RANGE(0x0400, 0x7fff) AM_RAM AM_SHARE("ram")
	AM_RANGE(0x8000, 0xbfff) AM_ROMBANK("rombank")
	AM_RANGE(0xc000, 0xffff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START(psionlz_mem, AS_PROGRAM, 8, psion_state)
	ADDRESS_MAP_UNMAP_LOW
	AM_RANGE(0x0000, 0x001f) AM_READWRITE(hd63701_int_reg_r, hd63701_int_reg_w)
	AM_RANGE(0x0040, 0x00ff) AM_RAM AM_SHARE("sys_register")
	AM_RANGE(0x0100, 0x03ff) AM_READWRITE(io_r, io_w)
	AM_RANGE(0x0400, 0x3fff) AM_RAM AM_SHARE("ram")
	AM_RANGE(0x4000, 0x7fff) AM_RAMBANK("rambank")
	AM_RANGE(0x8000, 0xbfff) AM_ROMBANK("rombank")
	AM_RANGE(0xc000, 0xffff) AM_ROM
ADDRESS_MAP_END

/* Input ports */
INPUT_PORTS_START( psion )
	PORT_START("BATTERY")
		PORT_CONFNAME( 0x01, 0x00, "Battery Status" )
		PORT_CONFSETTING( 0x00, DEF_STR( Normal ) )
		PORT_CONFSETTING( 0x01, "Low Battery" )

	PORT_START("ON")
		PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ON/CLEAR") PORT_CODE(KEYCODE_MINUS)  PORT_CHANGED_MEMBER(DEVICE_SELF, psion_state, psion_on, 0)

	PORT_START("K1")
		PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("MODE") PORT_CODE(KEYCODE_EQUALS)
		PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Up [CAP]") PORT_CODE(KEYCODE_UP)
		PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Down [NUM]") PORT_CODE(KEYCODE_DOWN)
		PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT)
		PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RIGHT") PORT_CODE(KEYCODE_RIGHT)

	PORT_START("K2")
		PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT)
		PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S [;]") PORT_CODE(KEYCODE_S)
		PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M [,]") PORT_CODE(KEYCODE_M)
		PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("G [=]") PORT_CODE(KEYCODE_G)
		PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A [<]") PORT_CODE(KEYCODE_A)

	PORT_START("K3")
		PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL)
		PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("T [:]") PORT_CODE(KEYCODE_T)
		PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("N [$]") PORT_CODE(KEYCODE_N)
		PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("H [\"]") PORT_CODE(KEYCODE_H)
		PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B [>]") PORT_CODE(KEYCODE_B)

	PORT_START("K4")
		PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Y [0]") PORT_CODE(KEYCODE_Y)
		PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("U [1]") PORT_CODE(KEYCODE_U)
		PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("O [4]") PORT_CODE(KEYCODE_O)
		PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I [7]") PORT_CODE(KEYCODE_I)
		PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C [(]") PORT_CODE(KEYCODE_C)

	PORT_START("K5")
		PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE)
		PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("W [3]") PORT_CODE(KEYCODE_W)
		PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Q [6]") PORT_CODE(KEYCODE_Q)
		PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("K [9]") PORT_CODE(KEYCODE_K)
		PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E [%]") PORT_CODE(KEYCODE_E)

	PORT_START("K6")
		PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("EXE") PORT_CODE(KEYCODE_ENTER)
		PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("X [+]") PORT_CODE(KEYCODE_X)
		PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R [-]") PORT_CODE(KEYCODE_R)
		PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L [*]") PORT_CODE(KEYCODE_L)
		PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F [/]") PORT_CODE(KEYCODE_F)

	PORT_START("K7")
		PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Z [.]") PORT_CODE(KEYCODE_Z)
		PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("V [2]") PORT_CODE(KEYCODE_V)
		PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("P [5]") PORT_CODE(KEYCODE_P)
		PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("J [8]") PORT_CODE(KEYCODE_J)
		PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D [)]") PORT_CODE(KEYCODE_D)
INPUT_PORTS_END


void psion_state::nvram_init(nvram_device &nvram, void *data, size_t size)
{
	//cold start (by default is 1=warm start)
	m_stby_pwr = 0;
}


void psion_state::machine_start()
{
	if (!strcmp(machine().system().name, "psionlam"))
	{
		m_rom_bank_count = 3;
		m_ram_bank_count = 0;
	}
	else if (!strcmp(machine().system().name, "psionp350"))
	{
		m_rom_bank_count = 0;
		m_ram_bank_count = 5;
	}
	else if (!strncmp(machine().system().name, "psionlz", 7))
	{
		m_rom_bank_count = 3;
		m_ram_bank_count = 3;
	}
	else if (!strcmp(machine().system().name, "psionp464"))
	{
		m_rom_bank_count = 3;
		m_ram_bank_count = 9;
	}
	else
	{
		m_rom_bank_count = 0;
		m_ram_bank_count = 0;
	}

	if (m_rom_bank_count)
	{
		UINT8* rom_base = (UINT8 *)memregion("maincpu")->base();

		membank("rombank")->configure_entry(0, rom_base + 0x8000);
		membank("rombank")->configure_entries(1, m_rom_bank_count-1, rom_base + 0x10000, 0x4000);
		membank("rombank")->set_entry(0);
	}

	if (m_ram_bank_count)
	{
		m_paged_ram = auto_alloc_array(machine(), UINT8, m_ram_bank_count * 0x4000);
		memset(m_paged_ram, 0, sizeof(UINT8) * (m_ram_bank_count * 0x4000));
		membank("rambank")->configure_entries(0, m_ram_bank_count, m_paged_ram, 0x4000);
		membank("rambank")->set_entry(0);
	}

	m_nvram1->set_base(m_sys_register, 0xc0);
	m_nvram2->set_base(m_ram, m_ram.bytes());
	if (m_nvram3)
		m_nvram3->set_base(m_paged_ram, m_ram_bank_count * 0x4000);

	save_item(NAME(m_kb_counter));
	save_item(NAME(m_enable_nmi));
	save_item(NAME(m_tcsr_value));
	save_item(NAME(m_stby_pwr));
	save_item(NAME(m_pulse));
	save_item(NAME(m_rom_bank));
	save_item(NAME(m_ram_bank));
	save_item(NAME(m_port2_ddr));
	save_item(NAME(m_port2));
	save_item(NAME(m_port6_ddr));
	save_item(NAME(m_port6));
	save_pointer(NAME(m_paged_ram), m_ram_bank_count * 0x4000);
}

void psion_state::machine_reset()
{
	m_enable_nmi=0;
	m_kb_counter=0;
	m_ram_bank=0;
	m_rom_bank=0;
	m_pulse=0;

	if (m_rom_bank_count || m_ram_bank_count)
		update_banks();
}


HD44780_PIXEL_UPDATE(psion_state::lz_pixel_update)
{
	if (pos < 40)
	{
		static const UINT8 psion_display_layout[] =
		{
			0x00, 0x01, 0x02, 0x03, 0x28, 0x29, 0x2a, 0x2b, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x2c, 0x2d, 0x2e, 0x2f,
			0x30, 0x31, 0x32, 0x33, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
			0x14, 0x15, 0x16, 0x17, 0x3c, 0x3d, 0x3e, 0x3f, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x40, 0x41, 0x42, 0x43,
			0x44, 0x45, 0x46, 0x47, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f
		};

		UINT8 char_pos = psion_display_layout[line*40 + pos];
		bitmap.pix16((char_pos / 20) * 9 + y, (char_pos % 20) * 6 + x) = state;
	}
}

PALETTE_INIT_MEMBER(psion_state, psion)
{
	palette.set_pen_color(0, rgb_t(138, 146, 148));
	palette.set_pen_color(1, rgb_t(92, 83, 88));
}

static const gfx_layout psion_charlayout =
{
	5, 8,                   /* 5 x 8 characters */
	256,                    /* 256 characters */
	1,                      /* 1 bits per pixel */
	{ 0 },                  /* no bitplanes */
	{ 3, 4, 5, 6, 7},
	{ 0, 8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8},
	8*8                     /* 8 bytes */
};

static GFXDECODE_START( psion )
	GFXDECODE_ENTRY( "hd44780:cgrom", 0x0000, psion_charlayout, 0, 1 )
GFXDECODE_END

/* basic configuration for 2 lines display */
static MACHINE_CONFIG_START( psion_2lines, psion_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", HD63701, 980000) // should be HD6303 at 0.98MHz

	/* video hardware */
	MCFG_SCREEN_ADD("screen", LCD)
	MCFG_SCREEN_REFRESH_RATE(50)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
	MCFG_SCREEN_UPDATE_DEVICE("hd44780", hd44780_device, screen_update)
	MCFG_SCREEN_SIZE(6*16, 9*2)
	MCFG_SCREEN_VISIBLE_AREA(0, 6*16-1, 0, 9*2-1)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_DEFAULT_LAYOUT(layout_lcd)
	MCFG_PALETTE_ADD("palette", 2)
	MCFG_PALETTE_INIT_OWNER(psion_state, psion)
	MCFG_GFXDECODE_ADD("gfxdecode", "palette", psion)

	MCFG_HD44780_ADD("hd44780")
	MCFG_HD44780_LCD_SIZE(2, 16)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO( "mono" )
	MCFG_SOUND_ADD( "beeper", BEEP, 0 )
	MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 )

	MCFG_NVRAM_ADD_CUSTOM_DRIVER("nvram1", psion_state, nvram_init)     // sys_regs
	MCFG_NVRAM_ADD_0FILL("nvram2")                                      // RAM

	MCFG_TIMER_DRIVER_ADD_PERIODIC("nmi_timer", psion_state, nmi_timer, attotime::from_seconds(1))

	/* Datapack */
	MCFG_PSION_DATAPACK_ADD("pack1")
	MCFG_PSION_DATAPACK_ADD("pack2")

	/* Software lists */
	MCFG_SOFTWARE_LIST_ADD("pack_list", "psion")
MACHINE_CONFIG_END

/* basic configuration for 4 lines display */
static MACHINE_CONFIG_DERIVED( psion_4lines, psion_2lines )
	/* video hardware */
	MCFG_SCREEN_MODIFY("screen")
	MCFG_SCREEN_SIZE(6*20, 9*4)
	MCFG_SCREEN_VISIBLE_AREA(0, 6*20-1, 0, 9*4-1)

	MCFG_DEVICE_MODIFY("hd44780")
	MCFG_HD44780_LCD_SIZE(4, 20)
	MCFG_HD44780_PIXEL_UPDATE_CB(psion_state::lz_pixel_update)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( psioncm, psion_2lines )

	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(psioncm_mem)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( psionla, psion_2lines )

	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(psionla_mem)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( psionlam, psion_2lines )

	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(psionlam_mem)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( psionp350, psion_2lines )

	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(psionp350_mem)

	MCFG_NVRAM_ADD_0FILL("nvram3") // paged RAM
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( psionlz, psion_4lines )

	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(psionlz_mem)

	MCFG_NVRAM_ADD_0FILL("nvram3") // paged RAM
MACHINE_CONFIG_END

/* ROM definition */
ROM_START( psioncm )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v24", "CM v2.4")
	ROMX_LOAD( "24-cm.dat",    0x8000, 0x8000,  CRC(f6798394) SHA1(736997f0db9a9ee50d6785636bdc3f8ff1c33c66), ROM_BIOS(1))
ROM_END

ROM_START( psionla )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v33", "LA v3.3")
	ROMX_LOAD( "33-la.dat",    0x8000, 0x8000,  CRC(02668ed4) SHA1(e5d4ee6b1cde310a2970ffcc6f29a0ce09b08c46), ROM_BIOS(1))
ROM_END

ROM_START( psionp350 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v36", "POS350 v3.6")
	ROMX_LOAD( "36-p350.dat",  0x8000, 0x8000,  CRC(3a371a74) SHA1(9167210b2c0c3bd196afc08ca44ab23e4e62635e), ROM_BIOS(1))
	ROM_SYSTEM_BIOS(1, "v38", "POS350 v3.8")
	ROMX_LOAD( "38-p350.dat",  0x8000, 0x8000,  CRC(1b8b082f) SHA1(a3e875a59860e344f304a831148a7980f28eaa4a), ROM_BIOS(2))
ROM_END

ROM_START( psionlam )
	ROM_REGION( 0x18000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v37", "LA v3.7")
	ROMX_LOAD( "37-lam.dat",   0x8000, 0x10000, CRC(7ee3a1bc) SHA1(c7fbd6c8e47c9b7d5f636e9f56e911b363d6796b), ROM_BIOS(1))
ROM_END

ROM_START( psionlz64 )
	ROM_REGION( 0x18000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v44", "LZ64 v4.4")
	ROMX_LOAD( "44-lz64.dat",  0x8000, 0x10000, CRC(aa487913) SHA1(5a44390f63fc8c1bc94299ab2eb291bc3a5b989a), ROM_BIOS(1))

	ROM_REGION( 0x1000, "hd44780", 0 )
	ROM_LOAD( "psion_lz_charset.bin",    0x0000, 0x1000,  BAD_DUMP CRC(44bff6f6) SHA1(aef544548b783d608a7d55456f6c46f421a11ed7))
ROM_END

ROM_START( psionlz64s )
	ROM_REGION( 0x18000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v46", "LZ64 v4.6")
	ROMX_LOAD( "46-lz64s.dat", 0x8000, 0x10000, CRC(328d9772) SHA1(7f9e2d591d59ecfb0822d7067c2fe59542ea16dd), ROM_BIOS(1))

	ROM_REGION( 0x1000, "hd44780", 0 )
	ROM_LOAD( "psion_lz_charset.bin",    0x0000, 0x1000,  BAD_DUMP CRC(44bff6f6) SHA1(aef544548b783d608a7d55456f6c46f421a11ed7))
ROM_END

ROM_START( psionlz )
	ROM_REGION( 0x18000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v46", "LZ v4.6")
	ROMX_LOAD( "46-lz.dat",    0x8000, 0x10000, CRC(22715f48) SHA1(cf460c81cadb53eddb7afd8dadecbe8c38ea3fc2), ROM_BIOS(1))

	ROM_REGION( 0x1000, "hd44780", 0 )
	ROM_LOAD( "psion_lz_charset.bin",    0x0000, 0x1000,  BAD_DUMP CRC(44bff6f6) SHA1(aef544548b783d608a7d55456f6c46f421a11ed7))
ROM_END

ROM_START( psionp464 )
	ROM_REGION( 0x18000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS(0, "v46", "POS464 v4.6")
	ROMX_LOAD( "46-p464.dat",  0x8000, 0x10000, CRC(672a0945) SHA1(d2a6e3fe1019d1bd7ae4725e33a0b9973f8cd7d8), ROM_BIOS(1))

	ROM_REGION( 0x1000, "hd44780", 0 )
	ROM_LOAD( "psion_lz_charset.bin",    0x0000, 0x1000,  BAD_DUMP CRC(44bff6f6) SHA1(aef544548b783d608a7d55456f6c46f421a11ed7))
ROM_END

/* Driver */

/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT COMPANY   FULLNAME       FLAGS */
COMP( 1986, psioncm,    0,       0,     psioncm,        psion, driver_device,    0,   "Psion",   "Organiser II CM",     GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)
COMP( 1986, psionla,    psioncm, 0,     psionla,        psion, driver_device,    0,   "Psion",   "Organiser II LA",     GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)
COMP( 1986, psionp350,  psioncm, 0,     psionp350,      psion, driver_device,    0,   "Psion",   "Organiser II P350",   GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)
COMP( 1986, psionlam,   psioncm, 0,     psionlam,       psion, driver_device,    0,   "Psion",   "Organiser II LAM",    GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)
COMP( 1989, psionlz,    0,       0,     psionlz,        psion, driver_device,    0,   "Psion",   "Organiser II LZ",     GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)
COMP( 1989, psionlz64,  psionlz, 0,     psionlz,        psion, driver_device,    0,   "Psion",   "Organiser II LZ64",   GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)
COMP( 1989, psionlz64s, psionlz, 0,     psionlz,        psion, driver_device,    0,   "Psion",   "Organiser II LZ64S",  GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)
COMP( 1989, psionp464,  psionlz, 0,     psionlz,        psion, driver_device,    0,   "Psion",   "Organiser II P464",   GAME_SUPPORTS_SAVE | GAME_IMPERFECT_GRAPHICS)