summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/audio/seibu.c
blob: 6b8d87de0a78e0b44f788e0285cc52b55eb28ea8 (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
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
/***************************************************************************

    Seibu Sound System v1.02, designed 1986 by Seibu Kaihatsu

    The Seibu sound system comprises of a Z80A, a YM3812, a YM3931*, and
    an Oki MSM6295.  As well as sound the Z80 can controls coins and pass
    data to the main cpu.  There are a few little quirks that make it
    worthwhile emulating in a seperate file:

    * The YM3812 generates interrupt RST10, by asserting the interrupt line,
    and placing 0xd7 on the data bus.

    * The main cpu generates interrupt RST18, by asserting the interrupt line,
    and placing 0xdf on the data bus.

    A problem can occur if both the YM3812 and the main cpu try to assert
    the interrupt line at the same time.  The effect in the old Mame
    emulation would be for sound to stop playing - this is because a RST18
    cancelled out a RST10, and if a single RST10 is dropped sound stops
    as the YM3812 timer is not reset.  The problem occurs because even
    if both interrupts happen at the same time, there can only be one value
    on the data bus.  Obviously the real hardware must have some circuit
    to prevent this.  It is emulated by user timers to control the z80
    interrupt vector.

    * The YM3931 is the main/sub cpu interface, similar to Konami's K054986A
      or Taito's TC0140SYT.  It also provides the Z80 memory map and
      interrupt control.  It's not a Yamaha chip :-)

    Emulation by Bryan McPhail, mish@tendril.co.uk
    ADPCM by R. Belmont and Jarek Burczynski

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

#include "driver.h"
#include "deprecat.h"
#include "streams.h"
#include "audio/seibu.h"
#include "sound/3812intf.h"
#include "sound/2151intf.h"
#include "sound/2203intf.h"
#include "sound/okim6295.h"


/*
    Games using encrypted sound cpu:

    Air Raid         1987   "START UP PROGRAM V1.02 (C)1986 SEIBU KAIHATSU INC."
    Cabal            1988   "Michel/Seibu    sound 11/04/88"
    Dead Angle       1988?  "START UP PROGRAM V1.02 (C)1986 SEIBU KAIHATSU INC."
    Dynamite Duke    1989   "START UP PROGRAM V1.02 (C)1986 SEIBU KAIHATSU INC."
    Toki             1989   "START UP PROGRAM V1.02 (C)1986 SEIBU KAIHATSU INC."
    Raiden (alt)     1990   "START UP PROGRAM V1.02 (C)1986 SEIBU KAIHATSU INC."

    raiden and the decrypted raidena are not identical, there are vast sections of different data.
    However, there are a few different bytes in the middle of identical data, suggesting a possible
    error in the decryption scheme: they all require an additional XOR with 0x20 and are located at
    similar addresses.
    00002422: 03 23
    000024A1: 00 20
    000024A2: 09 29
    00002822: 48 68
    000028A1: 06 26
    00002A21: 17 37
    00002A22: 00 20
    00002AA1: 12 32
    00002C21: 02 22
    00002CA1: 02 22
    00002CA2: 17 37
*/


static UINT8 decrypt_data(int a,int src)
{
	if ( BIT(a,9)  &  BIT(a,8))             src ^= 0x80;
	if ( BIT(a,11) &  BIT(a,4) &  BIT(a,1)) src ^= 0x40;
	if ( BIT(a,11) & ~BIT(a,8) &  BIT(a,1)) src ^= 0x04;
	if ( BIT(a,13) & ~BIT(a,6) &  BIT(a,4)) src ^= 0x02;
	if (~BIT(a,11) &  BIT(a,9) &  BIT(a,2)) src ^= 0x01;

	if (BIT(a,13) &  BIT(a,4)) src = BITSWAP8(src,7,6,5,4,3,2,0,1);
	if (BIT(a, 8) &  BIT(a,4)) src = BITSWAP8(src,7,6,5,4,2,3,1,0);

	return src;
}

static UINT8 decrypt_opcode(int a,int src)
{
	if ( BIT(a,9)  &  BIT(a,8))             src ^= 0x80;
	if ( BIT(a,11) &  BIT(a,4) &  BIT(a,1)) src ^= 0x40;
	if (~BIT(a,13) & BIT(a,12))             src ^= 0x20;
	if (~BIT(a,6)  &  BIT(a,1))             src ^= 0x10;
	if (~BIT(a,12) &  BIT(a,2))             src ^= 0x08;
	if ( BIT(a,11) & ~BIT(a,8) &  BIT(a,1)) src ^= 0x04;
	if ( BIT(a,13) & ~BIT(a,6) &  BIT(a,4)) src ^= 0x02;
	if (~BIT(a,11) &  BIT(a,9) &  BIT(a,2)) src ^= 0x01;

	if (BIT(a,13) &  BIT(a,4)) src = BITSWAP8(src,7,6,5,4,3,2,0,1);
	if (BIT(a, 8) &  BIT(a,4)) src = BITSWAP8(src,7,6,5,4,2,3,1,0);
	if (BIT(a,12) &  BIT(a,9)) src = BITSWAP8(src,7,6,4,5,3,2,1,0);
	if (BIT(a,11) & ~BIT(a,6)) src = BITSWAP8(src,6,7,5,4,3,2,1,0);

	return src;
}

void seibu_sound_decrypt(running_machine *machine,const char *cpu,int length)
{
	UINT8 *decrypt = auto_malloc(length);
	UINT8 *rom = memory_region(machine, cpu);
	int i;

	memory_set_decrypted_region(mame_find_cpu_index(machine, cpu), 0x0000, (length < 0x10000) ? (length - 1) : 0x1fff, decrypt);

	for (i = 0;i < length;i++)
	{
		UINT8 src = rom[i];

		rom[i]      = decrypt_data(i,src);
		decrypt[i]  = decrypt_opcode(i,src);
	}

	if (length > 0x10000)
		memory_configure_bank_decrypted(1, 0, (length - 0x10000) / 0x8000, decrypt + 0x10000, 0x8000);
}


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

/*
    Handlers for early Seibu/Tad games with dual channel ADPCM
*/

static struct seibu_adpcm_state
{
	struct adpcm_state adpcm;
	sound_stream *stream;
	UINT32 current, end;
	UINT8 nibble;
	UINT8 playing;
	UINT8 allocated;
	UINT8 *base;
} seibu_adpcm[2];

static void seibu_adpcm_callback(void *param, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
	struct seibu_adpcm_state *state = param;
	stream_sample_t *dest = outputs[0];

	while (state->playing && samples > 0)
	{
		int val = (state->base[state->current] >> state->nibble) & 15;

		state->nibble ^= 4;
		if (state->nibble == 4)
		{
			state->current++;
			if (state->current >= state->end)
				state->playing = 0;
		}

		*dest++ = clock_adpcm(&state->adpcm, val);
		samples--;
	}
	while (samples > 0)
	{
		*dest++ = 0;
		samples--;
	}
}

static void *seibu_adpcm_start(int clock, const struct CustomSound_interface *config)
{
	int i;

	for (i = 0; i < 2; i++)
		if (!seibu_adpcm[i].allocated)
		{
			struct seibu_adpcm_state *state = &seibu_adpcm[i];
			state->allocated = 1;
			state->playing = 0;
			state->stream = stream_create(0, 1, clock, state, seibu_adpcm_callback);
			state->base = memory_region(Machine, "adpcm");
			reset_adpcm(&state->adpcm);
			return state;
		}
	return NULL;
}

static void seibu_adpcm_stop(void *token)
{
	struct seibu_adpcm_state *state = token;
	state->allocated = 0;
}

// "decrypt" is a bit flowery here, as it's probably just line-swapping to
// simplify PCB layout/routing rather than intentional protection, but it
// still fits, especially since the Z80s for all these games are truly encrypted.

void seibu_adpcm_decrypt(running_machine *machine, const char *region)
{
	UINT8 *ROM = memory_region(machine, region);
	int len = memory_region_length(machine, region);
	int i;

	for (i = 0; i < len; i++)
	{
		ROM[i] = BITSWAP8(ROM[i], 7, 5, 3, 1, 6, 4, 2, 0);
	}
}

WRITE8_HANDLER( seibu_adpcm_adr_1_w )
{
	if (seibu_adpcm[0].stream)
		stream_update(seibu_adpcm[0].stream);
	if (offset)
	{
		seibu_adpcm[0].end = data<<8;
	}
	else
	{
		seibu_adpcm[0].current = data<<8;
		seibu_adpcm[0].nibble = 4;
	}
}

WRITE8_HANDLER( seibu_adpcm_ctl_1_w )
{
	// sequence is 00 02 01 each time.
	if (seibu_adpcm[0].stream)
		stream_update(seibu_adpcm[0].stream);
	switch (data)
	{
		case 0:
			seibu_adpcm[0].playing = 0;
			break;
		case 2:
			break;
		case 1:
			seibu_adpcm[0].playing = 1;
			break;

	}
}

WRITE8_HANDLER( seibu_adpcm_adr_2_w )
{
	if (seibu_adpcm[1].stream)
		stream_update(seibu_adpcm[1].stream);
	if (offset)
	{
		seibu_adpcm[1].end = (data<<8) + 0x10000;
	}
	else
	{
		seibu_adpcm[1].current = (data<<8) + 0x10000;
		seibu_adpcm[1].nibble = 4;
	}
}

WRITE8_HANDLER( seibu_adpcm_ctl_2_w )
{
	// sequence is 00 02 01 each time.
	if (seibu_adpcm[1].stream)
		stream_update(seibu_adpcm[1].stream);
	switch (data)
	{
		case 0:
			seibu_adpcm[1].playing = 0;
			break;
		case 2:
			break;
		case 1:
			seibu_adpcm[1].playing = 1;
			break;

	}
}

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

static int sound_cpu;

enum
{
	VECTOR_INIT,
	RST10_ASSERT,
	RST10_CLEAR,
	RST18_ASSERT,
	RST18_CLEAR
};

static void update_irq_lines(running_machine *machine, int param)
{
	static int irq1,irq2;

	switch(param)
	{
		case VECTOR_INIT:
			irq1 = irq2 = 0xff;
			break;

		case RST10_ASSERT:
			irq1 = 0xd7;
			break;

		case RST10_CLEAR:
			irq1 = 0xff;
			break;

		case RST18_ASSERT:
			irq2 = 0xdf;
			break;

		case RST18_CLEAR:
			irq2 = 0xff;
			break;
	}

	if ((irq1 & irq2) == 0xff)	/* no IRQs pending */
		cpunum_set_input_line(machine, sound_cpu,0,CLEAR_LINE);
	else	/* IRQ pending */
		cpunum_set_input_line_and_vector(machine, sound_cpu,0,ASSERT_LINE,irq1 & irq2);
}

WRITE8_HANDLER( seibu_irq_clear_w )
{
	update_irq_lines(machine, VECTOR_INIT);
}

WRITE8_HANDLER( seibu_rst10_ack_w )
{
	/* Unused for now */
}

WRITE8_HANDLER( seibu_rst18_ack_w )
{
	update_irq_lines(machine, RST18_CLEAR);
}

void seibu_ym3812_irqhandler(running_machine *machine, int linestate)
{
	update_irq_lines(machine, linestate ? RST10_ASSERT : RST10_CLEAR);
}

void seibu_ym2151_irqhandler(running_machine *machine, int linestate)
{
	update_irq_lines(machine, linestate ? RST10_ASSERT : RST10_CLEAR);
}

void seibu_ym2203_irqhandler(running_machine *machine, int linestate)
{
	update_irq_lines(machine, linestate ? RST10_ASSERT : RST10_CLEAR);
}

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

MACHINE_RESET( seibu_sound )
{
	int romlength = memory_region_length(machine, "audio");
	UINT8 *rom = memory_region(machine, "audio");

	sound_cpu=mame_find_cpu_index(machine, "audio");
	update_irq_lines(machine, VECTOR_INIT);
	if (romlength > 0x10000)
		memory_configure_bank(1, 0, (romlength - 0x10000) / 0x8000, rom + 0x10000, 0x8000);
}

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

static UINT8 main2sub[2],sub2main[2];
static int main2sub_pending,sub2main_pending;

WRITE8_HANDLER( seibu_bank_w )
{
	memory_set_bank(1, data & 1);
}

WRITE8_HANDLER( seibu_coin_w )
{
	coin_counter_w(0,data & 1);
	coin_counter_w(1,data & 2);
}

READ8_HANDLER( seibu_soundlatch_r )
{
	return main2sub[offset];
}

READ8_HANDLER( seibu_main_data_pending_r )
{
	return sub2main_pending ? 1 : 0;
}

WRITE8_HANDLER( seibu_main_data_w )
{
	sub2main[offset] = data;
}

static WRITE8_HANDLER( seibu_pending_w )
{
	/* just a guess */
	main2sub_pending = 0;
	sub2main_pending = 1;
}

READ16_HANDLER( seibu_main_word_r )
{
	//logerror("%06x: seibu_main_word_r(%x)\n",activecpu_get_pc(),offset);
	switch (offset)
	{
		case 2:
		case 3:
			return sub2main[offset-2];
		case 5:
			return main2sub_pending ? 1 : 0;
		default:
			//logerror("%06x: seibu_main_word_r(%x)\n",activecpu_get_pc(),offset);
			return 0xffff;
	}
}

WRITE16_HANDLER( seibu_main_word_w )
{
	//logerror("%06x: seibu_main_word_w(%x,%02x)\n",activecpu_get_pc(),offset,data);
	if (ACCESSING_BITS_0_7)
	{
		switch (offset)
		{
			case 0:
			case 1:
				main2sub[offset] = data;
				break;
			case 4:
				update_irq_lines(machine, RST18_ASSERT);
				break;
			case 6:
				/* just a guess */
				sub2main_pending = 0;
				main2sub_pending = 1;
				break;
			default:
				//logerror("%06x: seibu_main_word_w(%x,%02x)\n",activecpu_get_pc(),offset,data);
				break;
		}
	}
}

READ8_HANDLER( seibu_main_v30_r )
{
	return seibu_main_word_r(machine,offset/2,0xffff) >> (8 * (offset & 1));
}

WRITE8_HANDLER( seibu_main_v30_w )
{
	seibu_main_word_w(machine,offset/2,data << (8 * (offset & 1)),0x00ff << (8 * (offset & 1)));
}

WRITE16_HANDLER( seibu_main_mustb_w )
{
	main2sub[0] = data&0xff;
	main2sub[1] = data>>8;

//  logerror("seibu_main_mustb_w: %x -> %x %x\n", data, main2sub[0], main2sub[1]);

	update_irq_lines(machine, RST18_ASSERT);
}

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

const struct YM3812interface seibu_ym3812_interface =
{
	seibu_ym3812_irqhandler
};

const struct CustomSound_interface seibu_adpcm_interface =
{
	seibu_adpcm_start,
	seibu_adpcm_stop
};

const struct YM2151interface seibu_ym2151_interface =
{
	seibu_ym2151_irqhandler
};

const struct YM2203interface seibu_ym2203_interface =
{
	{
		AY8910_LEGACY_OUTPUT,
		AY8910_DEFAULT_LOADS,
		NULL, NULL, NULL, NULL
	},
	seibu_ym2203_irqhandler
};

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

ADDRESS_MAP_START( seibu_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x2000, 0x27ff) AM_RAM
	AM_RANGE(0x4000, 0x4000) AM_WRITE(seibu_pending_w)
	AM_RANGE(0x4001, 0x4001) AM_WRITE(seibu_irq_clear_w)
	AM_RANGE(0x4002, 0x4002) AM_WRITE(seibu_rst10_ack_w)
	AM_RANGE(0x4003, 0x4003) AM_WRITE(seibu_rst18_ack_w)
	AM_RANGE(0x4007, 0x4007) AM_WRITE(seibu_bank_w)
	AM_RANGE(0x4008, 0x4008) AM_READWRITE(YM3812_status_port_0_r, YM3812_control_port_0_w)
	AM_RANGE(0x4009, 0x4009) AM_WRITE(YM3812_write_port_0_w)
	AM_RANGE(0x4010, 0x4011) AM_READ(seibu_soundlatch_r)
	AM_RANGE(0x4012, 0x4012) AM_READ(seibu_main_data_pending_r)
	AM_RANGE(0x4013, 0x4013) AM_READ_PORT("COIN")
	AM_RANGE(0x4018, 0x4019) AM_WRITE(seibu_main_data_w)
	AM_RANGE(0x401b, 0x401b) AM_WRITE(seibu_coin_w)
	AM_RANGE(0x6000, 0x6000) AM_READWRITE(OKIM6295_status_0_r, OKIM6295_data_0_w)
	AM_RANGE(0x8000, 0xffff) AM_ROMBANK(1)
ADDRESS_MAP_END


ADDRESS_MAP_START( seibu2_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x2000, 0x27ff) AM_RAM
	AM_RANGE(0x4000, 0x4000) AM_WRITE(seibu_pending_w)
	AM_RANGE(0x4001, 0x4001) AM_WRITE(seibu_irq_clear_w)
	AM_RANGE(0x4002, 0x4002) AM_WRITE(seibu_rst10_ack_w)
	AM_RANGE(0x4003, 0x4003) AM_WRITE(seibu_rst18_ack_w)
	AM_RANGE(0x4007, 0x4007) AM_WRITE(seibu_bank_w)
	AM_RANGE(0x4008, 0x4008) AM_WRITE(YM2151_register_port_0_w)
	AM_RANGE(0x4009, 0x4009) AM_READWRITE(YM2151_status_port_0_r, YM2151_data_port_0_w)
	AM_RANGE(0x4010, 0x4011) AM_READ(seibu_soundlatch_r)
	AM_RANGE(0x4012, 0x4012) AM_READ(seibu_main_data_pending_r)
	AM_RANGE(0x4013, 0x4013) AM_READ_PORT("COIN")
	AM_RANGE(0x4018, 0x4019) AM_WRITE(seibu_main_data_w)
	AM_RANGE(0x401b, 0x401b) AM_WRITE(seibu_coin_w)
	AM_RANGE(0x6000, 0x6000) AM_READWRITE(OKIM6295_status_0_r, OKIM6295_data_0_w)
	AM_RANGE(0x8000, 0xffff) AM_ROMBANK(1)
ADDRESS_MAP_END

ADDRESS_MAP_START( seibu2_raiden2_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x2000, 0x27ff) AM_RAM
	AM_RANGE(0x4000, 0x4000) AM_WRITE(seibu_pending_w)
	AM_RANGE(0x4001, 0x4001) AM_WRITE(seibu_irq_clear_w)
	AM_RANGE(0x4002, 0x4002) AM_WRITE(seibu_rst10_ack_w)
	AM_RANGE(0x4003, 0x4003) AM_WRITE(seibu_rst18_ack_w)
	AM_RANGE(0x4007, 0x4007) AM_WRITE(seibu_bank_w)
	AM_RANGE(0x4008, 0x4008) AM_WRITE(YM2151_register_port_0_w)
	AM_RANGE(0x4009, 0x4009) AM_READWRITE(YM2151_status_port_0_r, YM2151_data_port_0_w)
	AM_RANGE(0x4010, 0x4011) AM_READ(seibu_soundlatch_r)
	AM_RANGE(0x4012, 0x4012) AM_READ(seibu_main_data_pending_r)
	AM_RANGE(0x4013, 0x4013) AM_READ_PORT("COIN")
	AM_RANGE(0x4018, 0x4019) AM_WRITE(seibu_main_data_w)
	AM_RANGE(0x401b, 0x401b) AM_WRITE(seibu_coin_w)
	AM_RANGE(0x6000, 0x6000) AM_READWRITE(OKIM6295_status_0_r, OKIM6295_data_0_w)
	AM_RANGE(0x6002, 0x6002) AM_READWRITE(OKIM6295_status_1_r, OKIM6295_data_1_w)
	AM_RANGE(0x8000, 0xffff) AM_ROMBANK(1)
ADDRESS_MAP_END


ADDRESS_MAP_START( seibu3_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x2000, 0x27ff) AM_RAM
	AM_RANGE(0x4000, 0x4000) AM_WRITE(seibu_pending_w)
	AM_RANGE(0x4001, 0x4001) AM_WRITE(seibu_irq_clear_w)
	AM_RANGE(0x4002, 0x4002) AM_WRITE(seibu_rst10_ack_w)
	AM_RANGE(0x4003, 0x4003) AM_WRITE(seibu_rst18_ack_w)
	AM_RANGE(0x4007, 0x4007) AM_WRITE(seibu_bank_w)
	AM_RANGE(0x4008, 0x4008) AM_READWRITE(YM2203_status_port_0_r, YM2203_control_port_0_w)
	AM_RANGE(0x4009, 0x4009) AM_READWRITE(YM2203_read_port_0_r, YM2203_write_port_0_w)
	AM_RANGE(0x4010, 0x4011) AM_READ(seibu_soundlatch_r)
	AM_RANGE(0x4012, 0x4012) AM_READ(seibu_main_data_pending_r)
	AM_RANGE(0x4013, 0x4013) AM_READ_PORT("COIN")
	AM_RANGE(0x4018, 0x4019) AM_WRITE(seibu_main_data_w)
	AM_RANGE(0x401b, 0x401b) AM_WRITE(seibu_coin_w)
	AM_RANGE(0x6008, 0x6008) AM_READWRITE(YM2203_status_port_1_r, YM2203_control_port_1_w)
	AM_RANGE(0x6009, 0x6009) AM_READWRITE(YM2203_read_port_1_r, YM2203_write_port_1_w)
	AM_RANGE(0x8000, 0xffff) AM_ROMBANK(1)
ADDRESS_MAP_END

ADDRESS_MAP_START( seibu3_adpcm_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x2000, 0x27ff) AM_RAM
	AM_RANGE(0x4000, 0x4000) AM_WRITE(seibu_pending_w)
	AM_RANGE(0x4001, 0x4001) AM_WRITE(seibu_irq_clear_w)
	AM_RANGE(0x4002, 0x4002) AM_WRITE(seibu_rst10_ack_w)
	AM_RANGE(0x4003, 0x4003) AM_WRITE(seibu_rst18_ack_w)
	AM_RANGE(0x4005, 0x4006) AM_WRITE(seibu_adpcm_adr_1_w)
	AM_RANGE(0x4007, 0x4007) AM_WRITE(seibu_bank_w)
	AM_RANGE(0x4008, 0x4008) AM_READWRITE(YM2203_status_port_0_r, YM2203_control_port_0_w)
	AM_RANGE(0x4009, 0x4009) AM_READWRITE(YM2203_read_port_0_r, YM2203_write_port_0_w)
	AM_RANGE(0x4010, 0x4011) AM_READ(seibu_soundlatch_r)
	AM_RANGE(0x4012, 0x4012) AM_READ(seibu_main_data_pending_r)
	AM_RANGE(0x4013, 0x4013) AM_READ_PORT("COIN")
	AM_RANGE(0x4018, 0x4019) AM_WRITE(seibu_main_data_w)
	AM_RANGE(0x401a, 0x401a) AM_WRITE(seibu_adpcm_ctl_1_w)
	AM_RANGE(0x401b, 0x401b) AM_WRITE(seibu_coin_w)
	AM_RANGE(0x6005, 0x6006) AM_WRITE(seibu_adpcm_adr_2_w)
	AM_RANGE(0x6008, 0x6008) AM_READWRITE(YM2203_status_port_1_r, YM2203_control_port_1_w)
	AM_RANGE(0x6009, 0x6009) AM_READWRITE(YM2203_read_port_1_r, YM2203_write_port_1_w)
	AM_RANGE(0x601a, 0x601a) AM_WRITE(seibu_adpcm_ctl_2_w)
	AM_RANGE(0x8000, 0xffff) AM_ROMBANK(1)
ADDRESS_MAP_END