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// license:BSD-3-Clause
// copyright-holders:David Haywood
/* Miss Bubble 2 / Bubble Pong Pong

A rather odd bootleg of Bubble Bobble with level select, redesigned levels,
redesigned (8bpp!) graphics and different sound hardware... Crazy

Miss Bubble 2 notes:

The Sound NMI and/or Interrupts aren't likely to be right. The Sound CPU
starts writing to unusual memory ports - either because the NMI/Interrupt
timing is out, or the sheer fact that the Sound CPU code is rather poorly
written, so it may be normal behaviour.

*/

#include "emu.h"
#include "includes/bublbobl.h"

#include "cpu/z80/z80.h"
#include "sound/3526intf.h"
#include "sound/okim6295.h"
#include "machine/watchdog.h"
#include "screen.h"
#include "speaker.h"


class missb2_state : public bublbobl_state
{
public:
	missb2_state(const machine_config &mconfig, device_type type, const char *tag)
		: bublbobl_state(mconfig, type, tag)
		, m_bgvram(*this, "bgvram")
		, m_bgpalette(*this, "bgpalette")
		, m_oki(*this, "oki")
	{ }

	DECLARE_WRITE8_MEMBER(missb2_bg_bank_w);
	DECLARE_WRITE8_MEMBER(missb2_oki_w);
	DECLARE_READ8_MEMBER(missb2_oki_r);
	DECLARE_WRITE_LINE_MEMBER(irqhandler);
	DECLARE_DRIVER_INIT(missb2);
	DECLARE_MACHINE_START(missb2);
	DECLARE_MACHINE_RESET(missb2);
	uint32_t screen_update_missb2(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);

	void missb2(machine_config &config);
	void bublpong(machine_config &config);
	void maincpu_map(address_map &map);
	void sound_map(address_map &map);
	void subcpu_map(address_map &map);
protected:
	void configure_banks();

	required_shared_ptr<uint8_t> m_bgvram;
	required_device<palette_device> m_bgpalette;
	required_device<okim6295_device> m_oki;
};


/* Video Hardware */

uint32_t missb2_state::screen_update_missb2(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	int offs;
	int sx, sy, xc, yc;
	int gfx_num, gfx_attr, gfx_offs;
	const uint8_t *prom;
	const uint8_t *prom_line;
	uint16_t bg_offs;

	/* Bubble Bobble doesn't have a real video RAM. All graphics (characters */
	/* and sprites) are stored in the same memory region, and information on */
	/* the background character columns is stored in the area dd00-dd3f */

	bitmap.fill(255, cliprect);

	if (!m_video_enable)
		return 0;

	/* background map register */
	//popmessage("%02x",(*m_bgvram) & 0x1f);
	for (bg_offs = ((*m_bgvram) << 4); bg_offs < (((*m_bgvram) << 4) | 0xf); bg_offs++)
	{
		m_gfxdecode->gfx(1)->opaque(bitmap,cliprect,
				bg_offs,
				0,
				0,0,
				0,(bg_offs & 0xf) * 0x10);
	}


	sx = 0;

	prom = memregion("proms")->base();
	for (offs = 0; offs < m_objectram.bytes(); offs += 4)
	{
		/* skip empty sprites */
		/* this is dword aligned so the uint32_t * cast shouldn't give problems */
		/* on any architecture */
		if (*(uint32_t *)(&m_objectram[offs]) == 0)
			continue;

		gfx_num = m_objectram[offs + 1];
		gfx_attr = m_objectram[offs + 3];
		prom_line = prom + 0x80 + ((gfx_num & 0xe0) >> 1);

		gfx_offs = ((gfx_num & 0x1f) * 0x80);
		if ((gfx_num & 0xa0) == 0xa0)
			gfx_offs |= 0x1000;

		sy = -m_objectram[offs + 0];

		for (yc = 0; yc < 32; yc++)
		{
			if (prom_line[yc / 2] & 0x08)   continue;   /* NEXT */

			if (!(prom_line[yc / 2] & 0x04))    /* next column */
			{
				sx = m_objectram[offs + 2];
				if (gfx_attr & 0x40) sx -= 256;
			}

			for (xc = 0; xc < 2; xc++)
			{
				int goffs, code, /*color,*/ flipx, flipy, x, y;

				goffs = gfx_offs + xc * 0x40 + (yc & 7) * 0x02 +
						(prom_line[yc/2] & 0x03) * 0x10;
				code = m_videoram[goffs] + 256 * (m_videoram[goffs + 1] & 0x03) + 1024 * (gfx_attr & 0x0f);
				//color = (m_videoram[goffs + 1] & 0x3c) >> 2;
				flipx = m_videoram[goffs + 1] & 0x40;
				flipy = m_videoram[goffs + 1] & 0x80;
				x = sx + xc * 8;
				y = (sy + yc * 8) & 0xff;

				if (flip_screen())
				{
					x = 248 - x;
					y = 248 - y;
					flipx = !flipx;
					flipy = !flipy;
				}

				m_gfxdecode->gfx(0)->transpen(bitmap,cliprect,
						code,
						0,
						flipx,flipy,
						x,y,0xff);
			}
		}

		sx += 16;
	}
	return 0;
}


WRITE8_MEMBER(missb2_state::missb2_bg_bank_w)
{
	int bank;

	// I don't know how this is really connected, bit 1 is always high afaik...
	bank = ((data & 2) ? 1 : 0) | ((data & 1) ? 4 : 0);

	membank("bank2")->set_entry(bank);
	membank("bank3")->set_entry(bank);
}

WRITE8_MEMBER(missb2_state::missb2_oki_w)
{
	m_oki->write_command(bitswap<8>(data, 7,5,6,4,3,1,2,0));
}

READ8_MEMBER(missb2_state::missb2_oki_r)
{
	return bitswap<8>(m_oki->read_status(), 7,5,6,4,3,1,2,0);
}

/* Memory Maps */

void missb2_state::maincpu_map(address_map &map)
{
	map(0x0000, 0x7fff).rom();
	map(0x8000, 0xbfff).bankr("bank1");
	map(0xc000, 0xdcff).ram().share("videoram");
	map(0xdd00, 0xdfff).ram().share("objectram");
	map(0xe000, 0xf7ff).ram().share("share1");
	map(0xf800, 0xf9ff).ram().w(m_palette, FUNC(palette_device::write8)).share("palette");
	map(0xfa00, 0xfa00).mirror(0x007c).r(m_sound_to_main, FUNC(generic_latch_8_device::read)).w(m_main_to_sound, FUNC(generic_latch_8_device::write));
	map(0xfa01, 0xfa01).mirror(0x007c).r(this, FUNC(missb2_state::common_sound_semaphores_r));
	map(0xfa03, 0xfa03).mirror(0x007c).w(this, FUNC(missb2_state::bublbobl_soundcpu_reset_w));
	map(0xfa80, 0xfa80).mirror(0x007f).w("watchdog", FUNC(watchdog_timer_device::reset_w));
	map(0xfb40, 0xfb40).w(this, FUNC(missb2_state::bublbobl_bankswitch_w));
	map(0xfc00, 0xfcff).ram();
	map(0xfd00, 0xfdff).ram();         // ???
	map(0xfe00, 0xfe03).ram();         // ???
	map(0xfe80, 0xfe83).ram();         // ???
	map(0xff00, 0xff00).portr("DSW1");
	map(0xff01, 0xff01).portr("DSW2");
	map(0xff02, 0xff02).portr("P1");
	map(0xff03, 0xff03).portr("P2");
	map(0xff94, 0xff94).nopw();    // ???
	map(0xff98, 0xff98).nopw();    // ???
}

void missb2_state::subcpu_map(address_map &map)
{
	map(0x0000, 0x7fff).rom();
	map(0x9000, 0x9fff).bankr("bank2");    // ROM data for the background palette ram
	map(0xa000, 0xafff).bankr("bank3");    // ROM data for the background palette ram
	map(0xb000, 0xb1ff).rom();         // banked ???
	map(0xc000, 0xc1ff).ram().w(m_bgpalette, FUNC(palette_device::write8)).share("bgpalette");
	map(0xc800, 0xcfff).ram();         // main ???
	map(0xd000, 0xd000).w(this, FUNC(missb2_state::missb2_bg_bank_w));
	map(0xd002, 0xd002).nopw();
	map(0xd003, 0xd003).ram().share("bgvram");
	map(0xe000, 0xf7ff).ram().share("share1");
}

// Looks like the original bublbobl code modified to support the OKI M6295.
// due to some really wacky bugs in the way the oki6295 was hacked in place, writes will happen to
// many addresses other than 9000: 9000-9001, 0000-0001, 3827-3828, 44a8-44a9
void missb2_state::sound_map(address_map &map)
{
	map(0x0000, 0x7fff).rom();
	map(0x8000, 0x8fff).ram();
	map(0x9000, 0x9000).rw(this, FUNC(missb2_state::missb2_oki_r), FUNC(missb2_state::missb2_oki_w)); //AM_MIRROR(0x0fff) ???
	map(0xa000, 0xa001).mirror(0x0ffe).rw("ymsnd", FUNC(ym3526_device::read), FUNC(ym3526_device::write));
	map(0xb000, 0xb000).mirror(0x0ffc).r(m_main_to_sound, FUNC(generic_latch_8_device::read)).w(m_sound_to_main, FUNC(generic_latch_8_device::write));
	map(0xb001, 0xb001).mirror(0x0ffc).r(this, FUNC(missb2_state::common_sound_semaphores_r)).w(m_soundnmi, FUNC(input_merger_device::in_set<0>));
	map(0xb002, 0xb002).mirror(0x0ffc).w(m_soundnmi, FUNC(input_merger_device::in_clear<0>));
	map(0xe000, 0xefff).rom();         // space for diagnostic ROM?
}

/* Input Ports */

static INPUT_PORTS_START( missb2 )
	PORT_START("DSW1")
	PORT_DIPNAME( 0x01, 0x00, DEF_STR( Language ) )
	PORT_DIPSETTING(    0x00, DEF_STR( English ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Japanese ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_SERVICE( 0x04, IP_ACTIVE_LOW )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
	PORT_DIPNAME( 0x30, 0x30, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 1C_2C ) )
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_2C ) )

	PORT_START("DSW2")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x03, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x08, "20K 80K" )
	PORT_DIPSETTING(    0x0c, "30K 100K" )
	PORT_DIPSETTING(    0x04, "40K 200K" )
	PORT_DIPSETTING(    0x00, "50K 250K" )
	PORT_DIPNAME( 0x30, 0x30, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x10, "1" )
	PORT_DIPSETTING(    0x00, "2" )
	PORT_DIPSETTING(    0x30, "3" )
	PORT_DIPSETTING(    0x20, "5" )
	PORT_DIPNAME( 0xc0, 0x00, "Monster Speed" )
	PORT_DIPSETTING(    0x00, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Medium ) )
	PORT_DIPSETTING(    0x80, DEF_STR( High ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( Very_High ) )

	PORT_START("P1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_2WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_2WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("P2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_PLAYER(2)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_PLAYER(2)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_TILT ) // ???
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
INPUT_PORTS_END

/* Graphics Layouts */

static const gfx_layout charlayout =
{
	8,8,
	RGN_FRAC(1,4),
	8,
	{ RGN_FRAC(0,4)+0, RGN_FRAC(0,4)+4, RGN_FRAC(1,4)+0, RGN_FRAC(1,4)+4, RGN_FRAC(2,4)+0, RGN_FRAC(2,4)+4, RGN_FRAC(3,4)+0, RGN_FRAC(3,4)+4 },
	{ 3, 2, 1, 0, 8+3, 8+2, 8+1, 8+0 },
	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
	16*8
};

static const uint32_t bglayout_xoffset[256] =
{
		0*8,      1*8, 2048*8, 2049*8,    8*8,    9*8, 2056*8, 2057*8,
		4*8,      5*8, 2052*8, 2053*8,   12*8,   13*8, 2060*8, 2061*8,
		256*8 , 257*8, 2304*8, 2305*8,  264*8,  265*8, 2312*8, 2313*8,
		260*8 , 261*8, 2308*8, 2309*8,  268*8,  269*8, 2316*8, 2317*8,
		1024*8, 1025*8, 3072*8, 3073*8, 1032*8, 1033*8, 3080*8, 3081*8,
		1028*8, 1029*8, 3076*8, 3077*8, 1036*8, 1037*8, 3084*8, 3085*8,
		1280*8, 1281*8, 3328*8, 3329*8, 1288*8, 1289*8, 3336*8, 3337*8,
		1284*8, 1285*8, 3332*8, 3333*8, 1292*8, 1293*8, 3340*8, 3341*8,
		512*8,  513*8, 2560*8, 2561*8,  520*8,  521*8, 2568*8, 2569*8,
		516*8,  517*8, 2564*8, 2565*8,  524*8,  525*8, 2572*8, 2573*8,
		768*8,  769*8, 2816*8, 2817*8,  776*8,  777*8, 2824*8, 2825*8,
		772*8,  773*8, 2820*8, 2821*8,  780*8,  781*8, 2828*8, 2829*8,
		1536*8, 1537*8, 3584*8, 3585*8, 1544*8, 1545*8, 3592*8, 3593*8,
		1540*8, 1541*8, 3588*8, 3589*8, 1548*8, 1549*8, 3596*8, 3597*8,
		1792*8, 1793*8, 3840*8, 3841*8, 1800*8, 1801*8, 3848*8, 3849*8,
		1796*8, 1797*8, 3844*8, 3845*8, 1804*8, 1805*8, 3852*8, 3853*8,
			2*8,    3*8, 2050*8, 2051*8,   10*8,   11*8, 2058*8, 2059*8,
			6*8,    7*8, 2054*8, 2055*8,     14*8,   15*8, 2062*8, 2063*8,
		258*8,  259*8, 2306*8, 2307*8,  266*8,  267*8, 2314*8, 2315*8,
		262*8,  263*8, 2310*8, 2311*8,  270*8,  271*8, 2318*8, 2319*8,
		1026*8, 1027*8, 3074*8, 3075*8, 1034*8, 1035*8, 3082*8, 3083*8,
		1030*8, 1031*8, 3078*8, 3079*8, 1038*8, 1039*8, 3086*8, 3087*8,
		1282*8, 1283*8, 3330*8, 3331*8, 1290*8, 1291*8, 3338*8, 3339*8,
		1286*8, 1287*8, 3334*8, 3335*8, 1294*8, 1295*8, 3342*8, 3343*8,
		514*8,  515*8, 2562*8, 2563*8,  522*8,  523*8, 2570*8, 2571*8,
		518*8,  519*8, 2566*8, 2567*8,  526*8,  527*8, 2574*8, 2575*8,
		770*8,  771*8, 2818*8, 2819*8,  778*8,  779*8, 2826*8, 2827*8,
		774*8,  775*8, 2822*8, 2823*8,  782*8,  783*8, 2830*8, 2831*8,
		1538*8, 1539*8, 3586*8, 3587*8, 1546*8, 1547*8, 3594*8, 3595*8,
		1542*8, 1543*8, 3590*8, 3591*8, 1550*8, 1551*8, 3598*8, 3599*8,
		1794*8, 1795*8, 3842*8, 3843*8, 1802*8, 1803*8, 3850*8, 3851*8,
		1798*8, 1799*8, 3846*8, 3847*8, 1806*8, 1807*8, 3854*8, 3855*8
};

static const gfx_layout bglayout =
{
	256,16,
	RGN_FRAC(1,1),
	8,
	{ 0,1,2,3,4,5,6,7 },
	EXTENDED_XOFFS,
	{ 0*128, 1*128, 2*128, 3*128, 4*128, 5*128, 6*128, 7*128, 8*128, 9*128, 10*128, 11*128, 12*128, 13*128, 14*128, 15*128 },
	256*128,
	bglayout_xoffset,
	nullptr
};

static const uint32_t bglayout_xoffset_alt[256] =
{
		(256*0+0)*8 , (256*0+1)*8 , (256*0+2)*8 , (256*0+3)*8 , (256*0+4)*8 , (256*0+5)*8 , (256*0+6)*8 , (256*0+7)*8,
		(256*0+8)*8 , (256*0+9)*8 , (256*0+10)*8, (256*0+11)*8, (256*0+12)*8, (256*0+13)*8, (256*0+14)*8, (256*0+15)*8,
		(256*1+0)*8 , (256*1+1)*8 , (256*1+2)*8 , (256*1+3)*8 , (256*1+4)*8 , (256*1+5)*8 , (256*1+6)*8 , (256*1+7)*8,
		(256*1+8)*8 , (256*1+9)*8 , (256*1+10)*8, (256*1+11)*8, (256*1+12)*8, (256*1+13)*8, (256*1+14)*8, (256*1+15)*8,
		(256*2+0)*8 , (256*2+1)*8 , (256*2+2)*8 , (256*2+3)*8 , (256*2+4)*8 , (256*2+5)*8 , (256*2+6)*8 , (256*2+7)*8,
		(256*2+8)*8 , (256*2+9)*8 , (256*2+10)*8, (256*2+11)*8, (256*2+12)*8, (256*2+13)*8, (256*2+14)*8, (256*2+15)*8,
		(256*3+0)*8 , (256*3+1)*8 , (256*3+2)*8 , (256*3+3)*8 , (256*3+4)*8 , (256*3+5)*8 , (256*3+6)*8 , (256*3+7)*8,
		(256*3+8)*8 , (256*3+9)*8 , (256*3+10)*8, (256*3+11)*8, (256*3+12)*8, (256*3+13)*8, (256*3+14)*8, (256*3+15)*8,

		(256*4+0)*8 , (256*4+1)*8 , (256*4+2)*8 , (256*4+3)*8 , (256*4+4)*8 , (256*4+5)*8 , (256*4+6)*8 , (256*4+7)*8,
		(256*4+8)*8 , (256*4+9)*8 , (256*4+10)*8, (256*4+11)*8, (256*4+12)*8, (256*4+13)*8, (256*4+14)*8, (256*4+15)*8,
		(256*5+0)*8 , (256*5+1)*8 , (256*5+2)*8 , (256*5+3)*8 , (256*5+4)*8 , (256*5+5)*8 , (256*5+6)*8 , (256*5+7)*8,
		(256*5+8)*8 , (256*5+9)*8 , (256*5+10)*8, (256*5+11)*8, (256*5+12)*8, (256*5+13)*8, (256*5+14)*8, (256*5+15)*8,
		(256*6+0)*8 , (256*6+1)*8 , (256*6+2)*8 , (256*6+3)*8 , (256*6+4)*8 , (256*6+5)*8 , (256*6+6)*8 , (256*6+7)*8,
		(256*6+8)*8 , (256*6+9)*8 , (256*6+10)*8, (256*6+11)*8, (256*6+12)*8, (256*6+13)*8, (256*6+14)*8, (256*6+15)*8,
		(256*7+0)*8 , (256*7+1)*8 , (256*7+2)*8 , (256*7+3)*8 , (256*7+4)*8 , (256*7+5)*8 , (256*7+6)*8 , (256*7+7)*8,
		(256*7+8)*8 , (256*7+9)*8 , (256*7+10)*8, (256*7+11)*8, (256*7+12)*8, (256*7+13)*8, (256*7+14)*8, (256*7+15)*8,

		(256*8+0)*8 , (256*8+1)*8 , (256*8+2)*8 , (256*8+3)*8 , (256*8+4)*8 , (256*8+5)*8 , (256*8+6)*8 , (256*8+7)*8,
		(256*8+8)*8 , (256*8+9)*8 , (256*8+10)*8, (256*8+11)*8, (256*8+12)*8, (256*8+13)*8, (256*8+14)*8, (256*8+15)*8,
		(256*9+0)*8 , (256*9+1)*8 , (256*9+2)*8 , (256*9+3)*8 , (256*9+4)*8 , (256*9+5)*8 , (256*9+6)*8 , (256*9+7)*8,
		(256*9+8)*8 , (256*9+9)*8 , (256*9+10)*8, (256*9+11)*8, (256*9+12)*8, (256*9+13)*8, (256*9+14)*8, (256*9+15)*8,
		(256*10+0)*8 , (256*10+1)*8 , (256*10+2)*8 , (256*10+3)*8 , (256*10+4)*8 , (256*10+5)*8 , (256*10+6)*8 , (256*10+7)*8,
		(256*10+8)*8 , (256*10+9)*8 , (256*10+10)*8, (256*10+11)*8, (256*10+12)*8, (256*10+13)*8, (256*10+14)*8, (256*10+15)*8,
		(256*11+0)*8 , (256*11+1)*8 , (256*11+2)*8 , (256*11+3)*8 , (256*11+4)*8 , (256*11+5)*8 , (256*11+6)*8 , (256*11+7)*8,
		(256*11+8)*8 , (256*11+9)*8 , (256*11+10)*8, (256*11+11)*8, (256*11+12)*8, (256*11+13)*8, (256*11+14)*8, (256*11+15)*8,

		(256*12+0)*8 , (256*12+1)*8 , (256*12+2)*8 , (256*12+3)*8 , (256*12+4)*8 , (256*12+5)*8 , (256*12+6)*8 , (256*12+7)*8,
		(256*12+8)*8 , (256*12+9)*8 , (256*12+10)*8, (256*12+11)*8, (256*12+12)*8, (256*12+13)*8, (256*12+14)*8, (256*12+15)*8,
		(256*13+0)*8 , (256*13+1)*8 , (256*13+2)*8 , (256*13+3)*8 , (256*13+4)*8 , (256*13+5)*8 , (256*13+6)*8 , (256*13+7)*8,
		(256*13+8)*8 , (256*13+9)*8 , (256*13+10)*8, (256*13+11)*8, (256*13+12)*8, (256*13+13)*8, (256*13+14)*8, (256*13+15)*8,
		(256*14+0)*8 , (256*14+1)*8 , (256*14+2)*8 , (256*14+3)*8 , (256*14+4)*8 , (256*14+5)*8 , (256*14+6)*8 , (256*14+7)*8,
		(256*14+8)*8 , (256*14+9)*8 , (256*14+10)*8, (256*14+11)*8, (256*14+12)*8, (256*14+13)*8, (256*14+14)*8, (256*14+15)*8,
		(256*15+0)*8 , (256*15+1)*8 , (256*15+2)*8 , (256*15+3)*8 , (256*15+4)*8 , (256*15+5)*8 , (256*15+6)*8 , (256*15+7)*8,
		(256*15+8)*8 , (256*15+9)*8 , (256*15+10)*8, (256*15+11)*8, (256*15+12)*8, (256*15+13)*8, (256*15+14)*8, (256*15+15)*8,

};


static const gfx_layout bglayout_alt =
{
	256,16,
	RGN_FRAC(1,1),
	8,
	{ 0,1,2,3,4,5,6,7 },
	EXTENDED_XOFFS,
	{ 0*128, 1*128, 2*128, 3*128, 4*128, 5*128, 6*128, 7*128, 8*128, 9*128, 10*128, 11*128, 12*128, 13*128, 14*128, 15*128 },
	256*128,
	bglayout_xoffset_alt,
	nullptr
};


/* Graphics Decode Information */

static GFXDECODE_START( missb2 )
	GFXDECODE_ENTRY( "gfx1", 0x00000, charlayout, 0, 1 )
	GFXDECODE_ENTRY( "gfx2", 0x00000, bglayout,   0, 2 )
GFXDECODE_END

static GFXDECODE_START( bublpong )
	GFXDECODE_ENTRY( "gfx1", 0x00000, charlayout, 0, 1 )
	GFXDECODE_ENTRY( "gfx2", 0x00000, bglayout_alt,   0, 2 )
GFXDECODE_END

#define MAIN_XTAL 24000000  // not sure about this

/* Sound Interfaces */

// Handler called by the 3526 emulator when the internal timers cause an IRQ
WRITE_LINE_MEMBER(missb2_state::irqhandler)
{
	logerror("YM3526 firing an IRQ\n");
//  m_audiocpu->set_input_line(0, irq ? ASSERT_LINE : CLEAR_LINE);
}



/* Machine Driver */

MACHINE_START_MEMBER(missb2_state,missb2)
{
	m_gfxdecode->gfx(1)->set_palette(*m_bgpalette);

	m_sreset_old = CLEAR_LINE;
	save_item(NAME(m_video_enable));
	save_item(NAME(m_sreset_old));
}

MACHINE_RESET_MEMBER(missb2_state,missb2)
{
	MACHINE_RESET_CALL_MEMBER(common);
	m_oki->reset();
	bublbobl_bankswitch_w(m_maincpu->space(AS_PROGRAM), 0, 0x00, 0xFF); // force a bankswitch write of all zeroes, as /RESET clears the latch
}

MACHINE_CONFIG_START(missb2_state::missb2)

	/* basic machine hardware */
	MCFG_DEVICE_ADD("maincpu", Z80, MAIN_XTAL/4)   // 6 MHz
	MCFG_DEVICE_PROGRAM_MAP(maincpu_map)
	MCFG_DEVICE_VBLANK_INT_DRIVER("screen", missb2_state,  irq0_line_hold)

	MCFG_DEVICE_ADD("subcpu", Z80, MAIN_XTAL/4) // 6 MHz
	MCFG_DEVICE_PROGRAM_MAP(subcpu_map)
	MCFG_DEVICE_VBLANK_INT_DRIVER("screen", missb2_state,  irq0_line_hold)

	MCFG_DEVICE_ADD("audiocpu", Z80, MAIN_XTAL/8)  // 3 MHz
	MCFG_DEVICE_PROGRAM_MAP(sound_map)
	MCFG_DEVICE_VBLANK_INT_DRIVER("screen", missb2_state,  irq0_line_hold)

	MCFG_QUANTUM_TIME(attotime::from_hz(6000)) // 100 CPU slices per frame - a high value to ensure proper synchronization of the CPUs

	MCFG_WATCHDOG_ADD("watchdog")
	MCFG_WATCHDOG_VBLANK_INIT("screen", 128);

	MCFG_MACHINE_START_OVERRIDE(missb2_state,missb2)
	MCFG_MACHINE_RESET_OVERRIDE(missb2_state,missb2)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MCFG_SCREEN_SIZE(32*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0, 32*8-1, 2*8, 30*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(missb2_state, screen_update_missb2)

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", missb2)
	MCFG_PALETTE_ADD("palette", 256)
	MCFG_PALETTE_FORMAT(RRRRGGGGBBBBxxxx)
	MCFG_PALETTE_ENDIANNESS(ENDIANNESS_BIG)
	MCFG_PALETTE_ADD("bgpalette", 256)
	MCFG_PALETTE_FORMAT(RRRRGGGGBBBBxxxx)
	MCFG_PALETTE_ENDIANNESS(ENDIANNESS_BIG)


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

	MCFG_INPUT_MERGER_ALL_HIGH("soundnmi")
	MCFG_INPUT_MERGER_OUTPUT_HANDLER(INPUTLINE("audiocpu", INPUT_LINE_NMI))

	MCFG_GENERIC_LATCH_8_ADD("main_to_sound")
	MCFG_GENERIC_LATCH_DATA_PENDING_CB(WRITELINE("soundnmi", input_merger_device, in_w<1>))

	MCFG_GENERIC_LATCH_8_ADD("sound_to_main")

	MCFG_DEVICE_ADD("ymsnd", YM3526, MAIN_XTAL/8)
	MCFG_YM3526_IRQ_HANDLER(WRITELINE(*this, missb2_state, irqhandler))
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.40)

	MCFG_DEVICE_ADD("oki", OKIM6295, 1056000, okim6295_device::PIN7_HIGH) // clock frequency & pin 7 not verified
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.4)
MACHINE_CONFIG_END

MACHINE_CONFIG_START(missb2_state::bublpong)
	missb2(config);
	MCFG_GFXDECODE_MODIFY("gfxdecode", bublpong)
MACHINE_CONFIG_END

/* ROMs */

ROM_START( missb2 )
	ROM_REGION( 0x30000, "maincpu", 0 )
	ROM_LOAD( "msbub2-u.204", 0x00000, 0x10000, CRC(b633bdde) SHA1(29a389c52ff06718f1c4c39f6a854856c237356b) ) /* FIRST AND SECOND HALF IDENTICAL */
	/* ROMs banked at 8000-bfff */
	ROM_LOAD( "msbub2-u.203", 0x10000, 0x10000, CRC(29fd8afe) SHA1(94ead80d20cd3974dd4fb0358915e3bd8b793158) )
	/* 20000-2ffff empty */

	ROM_REGION( 0x10000, "subcpu", 0 ) /* 64k for the second CPU */
	ROM_LOAD( "msbub2-u.11",  0x0000, 0x10000, CRC(003dc092) SHA1(dff3c2b31d0804a308e5c42cf9705cd3d6144ad7) )

	ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for the third CPU */
	ROM_LOAD( "msbub2-u.211", 0x0000, 0x08000, CRC(08e5d846) SHA1(8509a71df984f0348bdc6ab60eb2ba7ceb9b1246) )

	ROM_REGION( 0x100000, "gfx1", ROMREGION_INVERT )
	ROM_LOAD( "msbub2-u.14",  0x00000, 0x40000, CRC(b3164b47) SHA1(083a63010515b0aa43b482938ae302b2df985312) )
	ROM_LOAD( "msbub2-u.126", 0x40000, 0x40000, CRC(b0a9a353) SHA1(40d7f4c970d8571de319231c295fa0d2836efcf7) )
	ROM_LOAD( "msbub2-u.124", 0x80000, 0x40000, CRC(4b0d8e5b) SHA1(218da3edcfea228e6df1ac59bc24217713d79410) )
	ROM_LOAD( "msbub2-u.125", 0xc0000, 0x40000, CRC(77b710e2) SHA1(f6f46804a23de6c930bc40a3f45ac70e160f0645) )

	ROM_REGION( 0x200000, "gfx2", 0 ) /* background images */
	ROM_LOAD16_BYTE( "msbub2-u.ic1", 0x100001, 0x80000, CRC(d621cbc3) SHA1(36343d85bdde0e40dfe0f0e4e646546f175903f8) )
	ROM_LOAD16_BYTE( "msbub2-u.ic3", 0x100000, 0x80000, CRC(90e56035) SHA1(8fa18d97a05890178c52b97ff75aed300344a93e) )
	ROM_LOAD16_BYTE( "msbub2-u.ic2", 0x000001, 0x80000, CRC(694c2783) SHA1(401dc8713a02130289f364786c38e70c4c4f9b2e) )
	ROM_LOAD16_BYTE( "msbub2-u.ic4", 0x000000, 0x80000, CRC(be71c9f0) SHA1(1961e931017f644486cea0ce431d50973679c848) )

	ROM_REGION( 0x40000, "oki", 0 ) /* samples */
	//ROM_LOAD( "msbub2-u.13", 0x00000, 0x20000, BAD_DUMP CRC(14f07386) SHA1(097897d92226f900e11dbbdd853aff3ac46ff016) ) // this dump is bad, it has data of 0xFF for every address (only after and including address 0xB57E) where the low 8 bits of the address are in the range 0x40-0xBF. the rom from bublpong below has the same sample index at the beginning, and has the missing data intact, plus all the present data is a 1:1 match.
	ROM_LOAD( "msbub2-u.13", 0x00000, 0x20000, BAD_DUMP CRC(7a4f4272) SHA1(07712494f5166bcc8156a2152ae552a74f2184eb) ) // taken from bublpong ic13, probably correct but marked as bad until redump

	/* I doubt this prom is on the board, it's loaded so we can share video emulation with bubble bobble */
	ROM_REGION( 0x0100, "proms", 0 )
	ROM_LOAD( "a71-25.bin",  0x0000, 0x0100, CRC(2d0f8545) SHA1(089c31e2f614145ef2743164f7b52ae35bc06808) ) /* video timing - taken from bublbobl */
ROM_END

ROM_START( bublpong )
	ROM_REGION( 0x30000, "maincpu", 0 )
	ROM_LOAD( "u204", 0x00000, 0x8000, CRC(daeff303) SHA1(1bb2637b4f5555e0a4209b4549e1992501060909) )
	/* ROMs banked at 8000-bfff */
	ROM_LOAD( "u203", 0x10000, 0x10000, CRC(29fd8afe) SHA1(94ead80d20cd3974dd4fb0358915e3bd8b793158) )
	/* 20000-2ffff empty */

	ROM_REGION( 0x10000, "subcpu", 0 ) /* 64k for the second CPU */
	ROM_LOAD( "ic11",  0x0000, 0x10000, CRC(dc1c72ba) SHA1(89b3835884f46bea1ca49356a1faeddd87f772c9) )

	ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for the third CPU */
	ROM_LOAD( "s-1.u21", 0x0000, 0x08000, CRC(08e5d846) SHA1(8509a71df984f0348bdc6ab60eb2ba7ceb9b1246) )

	ROM_REGION( 0x100000, "gfx1", ROMREGION_INVERT )
	ROM_LOAD( "mp-6.ic14",  0x00000, 0x40000, CRC(00f4896b) SHA1(3d3d267c9c400de6898d362a230355792ca081ef) )
	ROM_LOAD( "mp-5.ic126", 0x40000, 0x40000, CRC(1fd30a32) SHA1(9ebffe1087752079627c0f42427019c376ca595b) )
	ROM_LOAD( "5.ic124", 0x80000, 0x40000, CRC(55666102) SHA1(db1d8b763324e0d93c53df0308506cdc1e857cf4) )
	ROM_LOAD( "6.ic125", 0xc0000, 0x40000, CRC(aa1c4c32) SHA1(6c6f7c8e0ac34f8e07c454644f01586fef3e0a1a) )

	ROM_REGION( 0x200000, "gfx2", 0 ) /* background images */
	ROM_LOAD16_BYTE( "4.ic1", 0x100001, 0x80000, CRC(652a49f8) SHA1(53d2d73f95ba3b51576bd317b54ccb2653358f4e) )
	ROM_LOAD16_BYTE( "2.ic3", 0x100000, 0x80000, CRC(f8b52c29) SHA1(4f6468cdad91d1f4d68f2dbd38a1fe79d60b8a58) )
	ROM_LOAD16_BYTE( "3.ic2", 0x000001, 0x80000, CRC(10263373) SHA1(700589d583dc609a6dba0cc51d8fa7f55df32e71) )
	ROM_LOAD16_BYTE( "1.ic4", 0x000000, 0x80000, CRC(9e19ad78) SHA1(b45c305152a7a3c58416837812f64f606d1ab610) )

	ROM_REGION( 0x40000, "oki", 0 ) /* samples */
	ROM_LOAD( "ic13", 0x00000, 0x20000, CRC(7a4f4272) SHA1(07712494f5166bcc8156a2152ae552a74f2184eb) )

	/* todo: verify if it has a prom */
	ROM_REGION( 0x0100, "proms", 0 )
	ROM_LOAD( "a71-25.bin",  0x0000, 0x0100, CRC(2d0f8545) SHA1(089c31e2f614145ef2743164f7b52ae35bc06808) ) /* video timing - taken from bublbobl */
ROM_END


void missb2_state::configure_banks()
{
	uint8_t *ROM = memregion("maincpu")->base();
	uint8_t *SUBCPU = memregion("subcpu")->base();

	membank("bank1")->configure_entries(0, 8, &ROM[0x10000], 0x4000);

	/* 2009-11 FP: isn't there a way to configure both at once? */
	membank("bank2")->configure_entries(0, 7, &SUBCPU[0x8000], 0x1000);
	membank("bank3")->configure_entries(0, 7, &SUBCPU[0x9000], 0x1000);
}

DRIVER_INIT_MEMBER(missb2_state,missb2)
{
	configure_banks();
	m_video_enable = 0;
}

/* Game Drivers */

GAME( 1996, missb2,   0,      missb2,   missb2, missb2_state, missb2, ROT0,  "Alpha Co.", "Miss Bubble II",   MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )
GAME( 1996, bublpong, missb2, bublpong, missb2, missb2_state, missb2, ROT0,  "Top Ltd.",  "Bubble Pong Pong", MACHINE_SUPPORTS_SAVE )