summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/missb2.c
blob: 1a13e362a16bc05fd60dad1433ec6107a908d832 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
/* Miss Bubble 2

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

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.

Also, the OKI M6295 seems to be playing the wrong samples, however the current
OKI M6295 sound ROM dump is bad.

*/

#include "driver.h"
#include "sound/okim6295.h"
#include "sound/3812intf.h"

static UINT8 *bg_paletteram, *missb2_bgvram;

/* video/bublbobl.c */
extern UINT8 *bublbobl_objectram;
extern size_t bublbobl_objectram_size;

/* machine/bublbobl.c */
WRITE8_HANDLER( bublbobl_bankswitch_w );
WRITE8_HANDLER( bublbobl_nmitrigger_w );
WRITE8_HANDLER( bublbobl_sound_command_w );
WRITE8_HANDLER( bublbobl_sh_nmi_disable_w );
WRITE8_HANDLER( bublbobl_sh_nmi_enable_w );
extern int bublbobl_video_enable;

/* Video Hardware */

static VIDEO_UPDATE( missb2 )
{
	int offs;
	int sx,sy,xc,yc;
	int gfx_num,gfx_attr,gfx_offs;
	const UINT8 *prom_line;
	UINT16 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 */

	/* This clears & redraws the entire screen each pass */
	fillbitmap(bitmap,machine->pens[255],&machine->screen[0].visarea);

	if (!bublbobl_video_enable) return 0;

	/* background map register */
	//popmessage("%02x",(*missb2_bgvram) & 0x1f);
	for(bg_offs = ((*missb2_bgvram) << 4);bg_offs<(((*missb2_bgvram)<< 4)|0xf);bg_offs++)
	{
		drawgfx(bitmap,machine->gfx[1],
				bg_offs,
				1,
				0,0,
				0,(bg_offs & 0xf) * 0x10,
				&machine->screen[0].visarea,TRANSPARENCY_NONE,0xff);
	}


	sx = 0;

	for (offs = 0;offs < bublbobl_objectram_size;offs += 4)
    {
		/* skip empty sprites */
		/* this is dword aligned so the UINT32 * cast shouldn't give problems */
		/* on any architecture */
		if (*(UINT32 *)(&bublbobl_objectram[offs]) == 0)
			continue;

		gfx_num = bublbobl_objectram[offs + 1];
		gfx_attr = bublbobl_objectram[offs + 3];
		prom_line = memory_region(REGION_PROMS) + 0x80 + ((gfx_num & 0xe0) >> 1);

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

		sy = -bublbobl_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 = bublbobl_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 = videoram[goffs] + 256 * (videoram[goffs + 1] & 0x03) + 1024 * (gfx_attr & 0x0f);
				color = (videoram[goffs + 1] & 0x3c) >> 2;
				flipx = videoram[goffs + 1] & 0x40;
				flipy = 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;
				}

				drawgfx(bitmap,machine->gfx[0],
						code,
						0,
						flipx,flipy,
						x,y,
						&machine->screen[0].visarea,TRANSPARENCY_PEN,0xff);
			}
		}

		sx += 16;
	}
	return 0;
}

INLINE void bg_changecolor_RRRRGGGGBBBBxxxx(pen_t color,int data)
{
	palette_set_color_rgb(Machine,color+256,pal4bit(data >> 12),pal4bit(data >> 8),pal4bit(data >> 4));
}

static WRITE8_HANDLER( bg_paletteram_RRRRGGGGBBBBxxxx_be_w )
{
	bg_paletteram[offset] = data;
	bg_changecolor_RRRRGGGGBBBBxxxx(offset / 2,bg_paletteram[offset | 1] | (bg_paletteram[offset & ~1] << 8));
}

static WRITE8_HANDLER( missb2_bg_bank_w )
{
	int bankaddress;
	UINT8 *RAM = memory_region(REGION_CPU2);

	// I don't know how this is really connected,bit 1 is always high afaik...
	bankaddress = ((data & 2) ? 0x1000 : 0x0000) | ((data & 1) ? 0x4000 : 0x0000) | (0x8000);
	memory_set_bankptr(2, &RAM[bankaddress]);
}

/* Memory Maps */

static ADDRESS_MAP_START( master_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM
	AM_RANGE(0x8000, 0xbfff) AM_ROMBANK(1)
	AM_RANGE(0xc000, 0xdcff) AM_RAM AM_BASE(&videoram) AM_SIZE(&videoram_size)
	AM_RANGE(0xdd00, 0xdfff) AM_RAM AM_BASE(&bublbobl_objectram) AM_SIZE(&bublbobl_objectram_size)
	AM_RANGE(0xe000, 0xf7ff) AM_RAM AM_SHARE(1)
	AM_RANGE(0xf800, 0xf9ff) AM_RAM AM_WRITE(paletteram_RRRRGGGGBBBBxxxx_be_w) AM_BASE(&paletteram)
	AM_RANGE(0xfa00, 0xfa00) AM_WRITE(bublbobl_sound_command_w)
	AM_RANGE(0xfa03, 0xfa03) AM_WRITENOP // sound cpu reset
	AM_RANGE(0xfa80, 0xfa80) AM_WRITENOP
	AM_RANGE(0xfb40, 0xfb40) AM_WRITE(bublbobl_bankswitch_w)
	AM_RANGE(0xfc00, 0xfcff) AM_RAM
	AM_RANGE(0xfd00, 0xfdff) AM_RAM			// ???
	AM_RANGE(0xfe00, 0xfe03) AM_RAM			// ???
	AM_RANGE(0xfe80, 0xfe83) AM_RAM			// ???
	AM_RANGE(0xff00, 0xff00) AM_READ(input_port_0_r)
	AM_RANGE(0xff01, 0xff01) AM_READ(input_port_1_r)
	AM_RANGE(0xff02, 0xff02) AM_READ(input_port_2_r)
	AM_RANGE(0xff03, 0xff03) AM_READ(input_port_3_r)
	AM_RANGE(0xff94, 0xff94) AM_WRITENOP	// ???
	AM_RANGE(0xff98, 0xff98) AM_WRITENOP	// ???
ADDRESS_MAP_END

static ADDRESS_MAP_START( slave_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM
	AM_RANGE(0x9000, 0xafff) AM_ROMBANK(2)	// ROM data for the background palette ram
	AM_RANGE(0xb000, 0xb1ff) AM_ROM			// banked ???
	AM_RANGE(0xc000, 0xc1ff) AM_RAM AM_WRITE(bg_paletteram_RRRRGGGGBBBBxxxx_be_w) AM_BASE(&bg_paletteram)
	AM_RANGE(0xc800, 0xcfff) AM_RAM			// main ???
	AM_RANGE(0xd000, 0xd000) AM_WRITE(missb2_bg_bank_w)
	AM_RANGE(0xd002, 0xd002) AM_WRITENOP
	AM_RANGE(0xd003, 0xd003) AM_RAM AM_BASE(&missb2_bgvram)
	AM_RANGE(0xe000, 0xf7ff) AM_RAM AM_SHARE(1)
ADDRESS_MAP_END

// Looks like the original bublbobl code modified to support the OKI M6295.

static ADDRESS_MAP_START( sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM
	AM_RANGE(0x8000, 0x8fff) AM_RAM
	AM_RANGE(0x9000, 0x9000) AM_READWRITE(OKIM6295_status_0_r, OKIM6295_data_0_w)
	AM_RANGE(0xa000, 0xa000) AM_READWRITE(YM3526_status_port_0_r, YM3526_control_port_0_w)
	AM_RANGE(0xa001, 0xa001) AM_WRITE(YM3526_write_port_0_w)
	AM_RANGE(0xb000, 0xb000) AM_READ(soundlatch_r) AM_WRITENOP // message for main cpu
	AM_RANGE(0xb001, 0xb001) AM_READNOP AM_WRITE(bublbobl_sh_nmi_enable_w)	// bit 0: message pending for main cpu, bit 1: message pending for sound cpu
	AM_RANGE(0xb002, 0xb002) AM_WRITE(bublbobl_sh_nmi_disable_w)
	AM_RANGE(0xe000, 0xefff) AM_ROM			// space for diagnostic ROM?
ADDRESS_MAP_END

/* Input Ports */

static INPUT_PORTS_START( missb2 )
	PORT_START_TAG("DSW0")
	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_TAG("DSW1")
	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_TAG("IN0")
	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_TAG("IN1")
	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 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,
	NULL
};

/* Graphics Decode Information */

static GFXDECODE_START( missb2 )
	GFXDECODE_ENTRY( REGION_GFX1, 0x00000, charlayout, 0, 1 )
	GFXDECODE_ENTRY( REGION_GFX2, 0x00000, bglayout,   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
static void irqhandler(int irq)
{
	logerror("YM3526 firing an IRQ\n");
//  cpunum_set_input_line(2,0,irq ? ASSERT_LINE : CLEAR_LINE);
}

static const struct YM3526interface ym3526_interface =
{
	irqhandler
};

/* Interrupt Generator */

static INTERRUPT_GEN( missb2_interrupt )
{
	cpunum_set_input_line(2, 0, HOLD_LINE);
}

/* Machine Driver */

static MACHINE_DRIVER_START( missb2 )
	// basic machine hardware
	MDRV_CPU_ADD(Z80, MAIN_XTAL/4)	// 6 MHz
	MDRV_CPU_PROGRAM_MAP(master_map, 0)
	MDRV_CPU_VBLANK_INT(irq0_line_hold, 1)

	MDRV_CPU_ADD(Z80, MAIN_XTAL/4)	// 6 MHz
	MDRV_CPU_PROGRAM_MAP(slave_map, 0)
	MDRV_CPU_VBLANK_INT(irq0_line_hold, 1)

	MDRV_CPU_ADD(Z80, MAIN_XTAL/8)
	/* audio CPU */	// 3 MHz
	MDRV_CPU_PROGRAM_MAP(sound_map, 0)
//  MDRV_CPU_VBLANK_INT(irq0_line_hold, 1)
	MDRV_CPU_VBLANK_INT(missb2_interrupt, 1)

	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
	MDRV_INTERLEAVE(100) // 100 CPU slices per frame - a high value to ensure proper synchronization of the CPUs

	// video hardware
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_SCREEN_VISIBLE_AREA(0, 32*8-1, 2*8, 30*8-1)
	MDRV_GFXDECODE(missb2)
	MDRV_PALETTE_LENGTH(512)

	MDRV_VIDEO_UPDATE(missb2)

	// sound hardware
	MDRV_SPEAKER_STANDARD_MONO("mono")

	MDRV_SOUND_ADD(YM3526, MAIN_XTAL/8)
	MDRV_SOUND_CONFIG(ym3526_interface)
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.40)

	MDRV_SOUND_ADD(OKIM6295, 1056000)
	MDRV_SOUND_CONFIG(okim6295_interface_region_1_pin7high) // clock frequency & pin 7 not verified
	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.4)
MACHINE_DRIVER_END

/* ROMs */

ROM_START( missb2 )
	ROM_REGION( 0x30000, REGION_CPU1, 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, REGION_CPU2, 0 ) /* 64k for the second CPU */
	ROM_LOAD( "msbub2-u.11",  0x0000, 0x10000, CRC(003dc092) SHA1(dff3c2b31d0804a308e5c42cf9705cd3d6144ad7) )

	ROM_REGION( 0x10000, REGION_CPU3, 0 ) /* 64k for the third CPU */
	ROM_LOAD( "msbub2-u.211", 0x0000, 0x08000, CRC(08e5d846) SHA1(8509a71df984f0348bdc6ab60eb2ba7ceb9b1246) )

	ROM_REGION( 0x100000, REGION_GFX1, ROMREGION_DISPOSE | 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, REGION_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( 0x20000, REGION_SOUND1, 0 ) /* samples */
	ROM_LOAD( "msbub2-u.13", 0x00000, 0x20000, BAD_DUMP CRC(14f07386) SHA1(097897d92226f900e11dbbdd853aff3ac46ff016) )

	ROM_REGION( 0x0100, REGION_PROMS, 0 )
	ROM_LOAD( "a71-25.bin",  0x0000, 0x0100, CRC(2d0f8545) SHA1(089c31e2f614145ef2743164f7b52ae35bc06808) )	/* video timing - taken from bublbobl */
ROM_END

/* Driver Initialization */

static DRIVER_INIT( missb2 )
{
	UINT8 *ROM = memory_region(REGION_CPU1);

	/* in Bubble Bobble, bank 0 has code falling from 7fff to 8000,
       so I have to copy it there because bank switching wouldn't catch it */
	memcpy(ROM+0x08000,ROM+0x10000,0x4000);

}

/* Game Drivers */

GAME( 1996, missb2, bublbobl, missb2, missb2, missb2, ROT0,  "Alpha Co", "Miss Bubble 2", GAME_IMPERFECT_GRAPHICS | GAME_IMPERFECT_SOUND )