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

Yumefuda (c) 1991 Alba

driver by Angelo Salese

Notes:
-I think the name of this hardware is "Alba ZG board",a newer revision of the
 "Alba ZC board" used by Hanaroku (hanaroku.c driver).Test mode says clearly that this is
 from 1991.

TODO:
-Add coin counter,coin lock etc.;
-Controls dynamically changes if you turn on the Panel Type DIP-SW,I'd imagine that the "royal
 panel" is just a dedicated panel for this game;
-"Custom RAM" emulation: might be a (weak) protection device or related to the "Back-up RAM NG"
 msg that pops up at every start-up.
-Video emulation requires a major conversion to the HD46505SP C.R.T. chip (MC6845 clone)

============================================================================================
Code disassembling
(anything that I don't know the meaning is in brackets):
[0458]-> (Writes to ports 00 & 01)
[04bd]-> Enables prot lock
[04d9]-> Palette RAM init
[0c55]-> Video Ram Init
[04c3]-> Disables prot lock
[2603]-> Custom Ram Math
[008b]-> Custom Ram Check 1 [without prot lock]
[009A]-> Custom Ram Check 2 [must be NZ]
[010e]-> Video Ram Math 1 [$c000]
[00A0]-> Video Ram Check 1 [must be Z]
[013b]-> Video Ram Math 2 [$d000]
[00A6]-> Video Ram Check 2 [must be Z]
[0197]-> Eeprom Check 1
    [2344] -> Eeprom sub check 1
    [2318] -> Eeprom sub check 2
    ...
[0222]-> Back Up Check
[047c]-> (Writes to ports 83 & 80)
[0488]-> Multiple writes to sound ports 40 & 41
[04b4]-> Disables prot lock
[0810]->[08b5]->write & read to sound port 40
[08dd]->
    [079d]->(write to port c0)
    [0985]->Nvram lock enable/disable
    ...
[0b44]-> Nvram Check
[0b1a]-> Nvram Check
[090a]-> (?)
[0312]-> Eeprom init msg
*******************************************************************************************/

#include "driver.h"
#include "cpu/z80/z80.h"
#include "machine/eeprom.h"
#include "sound/ay8910.h"

static tilemap *bg_tilemap;
static UINT8 mux_data;
static int bank;
static UINT8 *cus_ram;
static UINT8 prot_lock;



static TILE_GET_INFO( y_get_bg_tile_info )
{
	int code = videoram[tile_index];
	int color = colorram[tile_index];

	SET_TILE_INFO(
			0,
			code + ((color & 0xf8) << 3),
			color & 0x7,
			0);
}


static VIDEO_START( yumefuda )
{
	bg_tilemap = tilemap_create(machine, y_get_bg_tile_info,tilemap_scan_rows,8,8,32,32);
}

static VIDEO_UPDATE( yumefuda )
{
	tilemap_draw(bitmap,cliprect,bg_tilemap,0,0);
	return 0;
}

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

static const gfx_layout charlayout =
{
	8,8,
	RGN_FRAC(1,4),
	4,
	{ RGN_FRAC(0,4), RGN_FRAC(1,4), RGN_FRAC(2,4), RGN_FRAC(3,4) },
	{ 0, 1, 2, 3, 4, 5, 6, 7 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
	8*8
};

static GFXDECODE_START( yumefuda )
	GFXDECODE_ENTRY( "gfx1", 0x0000, charlayout,   0, 0x10 )
GFXDECODE_END


static WRITE8_HANDLER( yumefuda_vram_w )
{
	videoram[offset] = data;
	tilemap_mark_tile_dirty(bg_tilemap,offset);
}

static WRITE8_HANDLER( yumefuda_cram_w )
{
	colorram[offset] = data;
	tilemap_mark_tile_dirty(bg_tilemap,offset);
}

/*Custom RAM (Protection)*/
static READ8_HANDLER( custom_ram_r )
{
//  logerror("Custom RAM read at %02x PC = %x\n",offset+0xaf80,cpu_get_pc(space->cpu));
	return cus_ram[offset];// ^ 0x55;
}

static WRITE8_HANDLER( custom_ram_w )
{
//  logerror("Custom RAM write at %02x : %02x PC = %x\n",offset+0xaf80,data,cpu_get_pc(space->cpu));
	if(prot_lock)	{ cus_ram[offset] = data; }
}

/*this might be used as NVRAM commands btw*/
static WRITE8_HANDLER( prot_lock_w )
{
//  logerror("PC %04x Prot lock value written %02x\n",cpu_get_pc(space->cpu),data);
	prot_lock = data;
}

static WRITE8_HANDLER( eeprom_w )
{
	eeprom_write_bit(data & 0x04);
	eeprom_set_cs_line((data & 0x02) ? CLEAR_LINE : ASSERT_LINE);
	eeprom_set_clock_line((data & 0x08) ? ASSERT_LINE : CLEAR_LINE);
}

static WRITE8_HANDLER( port_c0_w )
{
//  logerror("PC %04x (Port $c0) value written %02x\n",cpu_get_pc(space->cpu),data);
}


static READ8_HANDLER( eeprom_r )
{
	return ((~eeprom_read_bit() & 0x01)<<6) | (0xff & ~0x40);
}

static READ8_HANDLER( mux_r )
{
	switch(mux_data)
	{
		case 0x00: return input_port_read(space->machine, "IN0");
		case 0x01: return input_port_read(space->machine, "IN1");
		case 0x02: return input_port_read(space->machine, "IN2");
		case 0x04: return input_port_read(space->machine, "IN3");
		case 0x08: return input_port_read(space->machine, "IN4");
		case 0x10: return input_port_read(space->machine, "IN5");
		case 0x20: return input_port_read(space->machine, "IN6");
	}

	//popmessage("%02x",mux_data);
	return 0xff;
}

static WRITE8_HANDLER( mux_w )
{
	int new_bank = (data&0xc0)>>6;

	//0x10000 "Learn Mode"
	//0x12000 gameplay
	//0x14000 bonus game
	//0x16000 ?
	if(bank!=new_bank) {
		UINT8 *ROM = memory_region(space->machine, "maincpu");
		UINT32 bankaddress;

		bank = new_bank;
		bankaddress = 0x10000 + 0x2000 * bank;
		memory_set_bankptr(space->machine, 1, &ROM[bankaddress]);
	}

	mux_data = data & ~0xc0;
}

static WRITE8_HANDLER( yumefuda_videoregs_w )
{
	static UINT8 address;

	if(offset == 0)
		address = data;
	else
	{
		switch(address)
		{
			case 0x0d: flip_screen_set(space->machine, data & 0x80); break;
			default:
				logerror("Video Register %02x called with %02x data\n",address,data);
		}
	}
}

static const ay8910_interface ay8910_config =
{
	AY8910_LEGACY_OUTPUT,
	AY8910_DEFAULT_LOADS,
	DEVCB_INPUT_PORT("DSW1"),
	DEVCB_INPUT_PORT("DSW2"),
	DEVCB_NULL,
	DEVCB_NULL
};

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

static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM
	AM_RANGE(0x8000, 0x9fff) AM_READWRITE(SMH_BANK1, SMH_ROM)
	AM_RANGE(0xa7fc, 0xa7fc) AM_WRITE(prot_lock_w)
	AM_RANGE(0xa7ff, 0xa7ff) AM_WRITE(eeprom_w)
	AM_RANGE(0xaf80, 0xafff) AM_READWRITE(custom_ram_r, custom_ram_w) AM_BASE(&cus_ram)
	AM_RANGE(0xb000, 0xb07f) AM_RAM_WRITE(paletteram_xRRRRRGGGGGBBBBB_split1_w) AM_BASE(&paletteram)
	AM_RANGE(0xb080, 0xb0ff) AM_RAM_WRITE(paletteram_xRRRRRGGGGGBBBBB_split2_w) AM_BASE(&paletteram_2)
	AM_RANGE(0xc000, 0xc3ff) AM_RAM_WRITE(yumefuda_vram_w) AM_BASE(&videoram)
	AM_RANGE(0xd000, 0xd3ff) AM_RAM_WRITE(yumefuda_cram_w) AM_BASE(&colorram)
	AM_RANGE(0xe000, 0xffff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START( port_map, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x00, 0x01) AM_WRITE(yumefuda_videoregs_w) // HD46505SP video registers
	AM_RANGE(0x40, 0x40) AM_DEVREAD("ay", ay8910_r)
	AM_RANGE(0x40, 0x41) AM_DEVWRITE("ay", ay8910_address_data_w)
	AM_RANGE(0x80, 0x80) AM_WRITE(mux_w)
	AM_RANGE(0x81, 0x81) AM_READ(eeprom_r)
	AM_RANGE(0x82, 0x82) AM_READ(mux_r)
	AM_RANGE(0xc0, 0xc0) AM_WRITE(port_c0_w) // video timing
ADDRESS_MAP_END

static MACHINE_RESET( yumefuda )
{
	mux_data = 0;
	bank = -1;
	prot_lock = 0;
}

static MACHINE_DRIVER_START( yumefuda )

	/* basic machine hardware */
	MDRV_CPU_ADD("maincpu", Z80 , 6000000) /*???*/
	MDRV_CPU_PROGRAM_MAP(main_map,0)
	MDRV_CPU_IO_MAP(port_map,0)
	MDRV_CPU_VBLANK_INT("screen", irq0_line_hold)

	MDRV_MACHINE_RESET(yumefuda)
	MDRV_NVRAM_HANDLER(93C46)

	/* video hardware */
	MDRV_SCREEN_ADD("screen", RASTER)
	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0, 32*8-1, 0, 32*8-1)

	MDRV_GFXDECODE( yumefuda )
	MDRV_PALETTE_LENGTH(0x80)

	MDRV_VIDEO_START( yumefuda )
	MDRV_VIDEO_UPDATE( yumefuda )

	/* sound hardware */
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD("ay", AY8910, 1500000)
	MDRV_SOUND_CONFIG(ay8910_config)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
MACHINE_DRIVER_END

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

static INPUT_PORTS_START( yumefuda )
	PORT_START( "IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("P1 Flip-Flop")  PORT_CODE(KEYCODE_F)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Coupon Credit") PORT_CODE(KEYCODE_7) PORT_IMPULSE(2) //coupon
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Note Credit")   PORT_CODE(KEYCODE_6) PORT_IMPULSE(2) //note
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(2)
	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START( "IN1")
	PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("P1 Button 1") PORT_CODE(KEYCODE_Z) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("P1 Button 2") PORT_CODE(KEYCODE_X) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_NAME("P1 Button 3") PORT_CODE(KEYCODE_C) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_NAME("P1 Button 4") PORT_CODE(KEYCODE_V) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("P1 BET Button") PORT_CODE(KEYCODE_2) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 ) PORT_NAME("P1 Start") PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)

	PORT_START( "IN2")
	PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_NAME("P1 Button 5") PORT_CODE(KEYCODE_B) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON7 ) PORT_NAME("P1 No Button") PORT_CODE(KEYCODE_A) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON8 ) PORT_NAME("P1 Yes Button") PORT_CODE(KEYCODE_Q) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_NAME("P1 Button 6") PORT_CODE(KEYCODE_N) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_NAME("P1 Button 3") PORT_CODE(KEYCODE_C) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("P1 Button 2")  PORT_CODE(KEYCODE_X) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("P1 Button 1") PORT_CODE(KEYCODE_Z) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_NAME("P1 Button 4") PORT_CODE(KEYCODE_V) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)

	PORT_START( "IN3")
	PORT_BIT( 0x9f, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 ) PORT_NAME("P1 Start") PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("P1 BET Button") PORT_CODE(KEYCODE_2) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_NAME("P1 Button 6") PORT_CODE(KEYCODE_N) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_NAME("P1 Button 5") PORT_CODE(KEYCODE_B) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)

	/* Some bits of these three are actually used if you use the Royal Panel type */
	PORT_START( "IN4")
	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

    PORT_START( "IN5")
	PORT_BIT( 0x9f, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x08)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON7 ) PORT_NAME("P1 No Button") PORT_CODE(KEYCODE_A) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON8 ) PORT_NAME("P1 Yes Button") PORT_CODE(KEYCODE_Q) PORT_CONDITION("DSW2", 0x08, PORTCOND_EQUALS, 0x00)

    PORT_START( "IN6")
	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

    /*Unused,on the PCB there's just one bank*/
    PORT_START("DSW1")
	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

	/*Added by translating the manual*/
    PORT_START("DSW2")
	PORT_DIPNAME( 0x01, 0x01, "Learn Mode" )//SW Dip-Switches
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Service_Mode ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, "Hopper Payout" )
	PORT_DIPSETTING(    0x04, "Hanafuda Type" )//hanaawase
	PORT_DIPSETTING(    0x00, "Royal Type" )
   	PORT_DIPNAME( 0x08, 0x08, "Panel Type" )
    PORT_DIPSETTING(    0x08, "Hanafuda Panel" )//hanaawase
    PORT_DIPSETTING(    0x00, "Royal Panel" )
    PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unused ) )
    PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
    PORT_DIPSETTING(    0x00, DEF_STR( On ) )
    PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unused ) )
    PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
    PORT_DIPSETTING(    0x00, DEF_STR( On ) )
    PORT_DIPNAME( 0x40, 0x00, DEF_STR( Flip_Screen ) )//Screen Orientation
    PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
    PORT_DIPSETTING(    0x00, DEF_STR( On ) )
    PORT_DIPNAME( 0x80, 0x80, DEF_STR( Cabinet ) )//Screen Flip
    PORT_DIPSETTING(    0x80, DEF_STR( Upright ) )
    PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )//pressing Flip-Flop button makes the screen flip
INPUT_PORTS_END

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


ROM_START( yumefuda )
	ROM_REGION( 0x18000, "maincpu", 0 ) /* code */
	ROM_LOAD("zg004y02.u43", 0x00000, 0x8000, CRC(974c543c) SHA1(56aeb318cb00445f133246dfddc8c24bb0c23f2d))
	ROM_LOAD("zg004y01.u42", 0x10000, 0x8000, CRC(ae99126b) SHA1(4ae2c1c804bbc505a013f5e3d98c0bfbb51b747a))

	ROM_REGION( 0x10000, "gfx1", 0 )
	ROM_LOAD("zg001006.u6", 0x0000, 0x4000, CRC(a5df443c) SHA1(a6c088a463c05e43a7b559c5d0afceddc88ef476))
	ROM_LOAD("zg001005.u5", 0x4000, 0x4000, CRC(158b6cde) SHA1(3e335b7dc1bbae2edb02722025180f32ab91f69f))
	ROM_LOAD("zg001004.u4", 0x8000, 0x4000, CRC(d8676435) SHA1(9b6df5378948f492717e1a4d9c833ddc5a9e8225))
	ROM_LOAD("zg001003.u3", 0xc000, 0x4000, CRC(5822ff27) SHA1(d40fa0790de3c912f770ef8f610bd8c42bc3500f))
ROM_END

GAME( 1991, yumefuda, 0, yumefuda, yumefuda, 0, ROT0, "Alba", "(Medal) Yumefuda [BET]", 0 )