summaryrefslogtreecommitdiffstats
path: root/src/mame/drivers/overdriv.cpp
blob: 25e9e8d0b2b70a427d491d35ebf8380b74dc9ee9 (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
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
/***************************************************************************

    Over Drive (GX789) (c) 1990 Konami

    driver by Nicola Salmoria

    Notes:
    - irq source for main CPU aren't understood, needs HW tests.
    - Missing road (two unemulated K053250)
    - Visible area and relative placement of sprites and tiles is most likely wrong.
    - Test mode doesn't work well with 3 IRQ5 per frame, the ROM check doesn't work
      and the coin A setting isn't shown. It's OK with 1 IRQ5 per frame.
    - The "Continue?" sprites are not visible until you press start
    - priorities


    The issues below are both IRQ timing, and relate to when the sprites get
    copied across by the DMA
        - Some flickering sprites, this might be an interrupt/timing issue
        - The screen is cluttered with sprites which aren't supposed to be visible,
          increasing the coordinate mask in k053247_sprites_draw() from 0x3ff to 0xfff
          fixes this but breaks other games (e.g. Vendetta).


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

#include "emu.h"

#include "machine/k053252.h"
#include "machine/timer.h"
#include "video/k051316.h"
#include "video/k053246_k053247_k055673.h"
#include "video/k053251.h"
#include "video/konami_helper.h"

#include "cpu/m68000/m68000.h"
#include "cpu/m6809/m6809.h"
#include "machine/adc0804.h"
#include "machine/eepromser.h"
#include "machine/rescap.h"
#include "sound/k053260.h"
#include "sound/ymopm.h"
#include "video/k053250.h"

#include "emupal.h"
#include "screen.h"
#include "speaker.h"

#include "overdriv.lh"

namespace {

class overdriv_state : public driver_device
{
public:
	overdriv_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "maincpu")
		, m_subcpu(*this, "sub")
		, m_audiocpu(*this, "audiocpu")
		, m_k051316_1(*this, "k051316_1")
		, m_k051316_2(*this, "k051316_2")
		, m_k053246(*this, "k053246")
		, m_k053251(*this, "k053251")
		, m_k053252(*this, "k053252")
		, m_screen(*this, "screen")
		, m_led(*this, "led0")
	{ }

	void overdriv(machine_config &config);

private:
	void eeprom_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
	void cpuA_ctrl_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
	uint16_t cpuB_ctrl_r();
	void cpuB_ctrl_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
	void overdriv_soundirq_w(uint16_t data);
	void sound_ack_w(uint8_t data);
	void slave_irq4_assert_w(uint16_t data);
	void slave_irq5_assert_w(uint16_t data);
	void objdma_w(uint8_t data);
	TIMER_CALLBACK_MEMBER(objdma_end_cb);

	uint32_t screen_update_overdriv(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	[[maybe_unused]] INTERRUPT_GEN_MEMBER(cpuB_interrupt);
	TIMER_DEVICE_CALLBACK_MEMBER(overdriv_cpuA_scanline);

	K051316_CB_MEMBER(zoom_callback_1);
	K051316_CB_MEMBER(zoom_callback_2);
	K053246_CB_MEMBER(sprite_callback);
	void overdriv_master_map(address_map &map);
	void overdriv_slave_map(address_map &map);
	void overdriv_sound_map(address_map &map);


	virtual void machine_start() override;
	virtual void machine_reset() override;

	/* video-related */
	int       m_zoom_colorbase[2]{};
	int       m_road_colorbase[2]{};
	int       m_sprite_colorbase = 0;
	emu_timer *m_objdma_end_timer = nullptr;

	/* misc */
	uint16_t     m_cpuB_ctrl = 0;

	/* devices */
	required_device<cpu_device> m_maincpu;
	required_device<cpu_device> m_subcpu;
	required_device<cpu_device> m_audiocpu;
	required_device<k051316_device> m_k051316_1;
	required_device<k051316_device> m_k051316_2;
	required_device<k053247_device> m_k053246;
	required_device<k053251_device> m_k053251;
	required_device<k053252_device> m_k053252;
	required_device<screen_device> m_screen;
	output_finder<> m_led;
	int m_fake_timer = 0;
};


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

  EEPROM

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

static const uint16_t overdriv_default_eeprom[64] =
{
	0x7758,0xFFFF,0x0078,0x9000,0x0078,0x7000,0x0078,0x5000,
	0x5441,0x4B51,0x3136,0x4655,0x4AFF,0x0300,0x0270,0x0250,
	0x00B4,0x0300,0xB403,0x00B4,0x0300,0xB403,0x00B4,0x0300,
	0xB403,0x00B4,0x0300,0xB403,0x00B4,0x0300,0xB403,0x00B4,
	0x0300,0xB403,0x00B4,0x0300,0xB403,0x00B4,0x0300,0xB403,
	0x00B4,0x0300,0xB403,0x00B4,0x0300,0xB403,0x00B4,0x0300,
	0xB403,0x00B4,0x0300,0xB403,0x00B4,0x0300,0xB403,0x00B4,
	0x0300,0xB403,0x00B4,0x0300,0xB403,0x00B4,0x0300,0xB403
};


void overdriv_state::eeprom_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
//logerror("%s: write %04x to eeprom_w\n",machine().describe_context(),data);
	if (ACCESSING_BITS_0_7)
	{
		/* bit 0 is data */
		/* bit 1 is clock (active high) */
		/* bit 2 is cs (active low) */
		ioport("EEPROMOUT")->write(data, 0xff);
	}
}

TIMER_DEVICE_CALLBACK_MEMBER(overdriv_state::overdriv_cpuA_scanline)
{
	const int timer_threshold = 168; // fwiw matches 0 on mask ROM check, so IF it's a timer irq then should be close ...
	int scanline = param;

	m_fake_timer ++;

	// TODO: irqs routines are TOO slow right now, it ends up firing spurious irqs for whatever reason (shared ram fighting?)
	//       this is a temporary solution to get rid of deprecat lib and the crashes, but also makes the game timer to be too slow.
	//       Update: gameplay is actually too fast compared to timer, first attract mode shouldn't even surpass first blue car on right.
	if(scanline == 256) // vblank-out irq
	{
		// m_screen->frame_number() & 1
		m_maincpu->set_input_line(4, HOLD_LINE);
	}
	else if(m_fake_timer >= timer_threshold) // timer irq
	{
		m_fake_timer -= timer_threshold;
		m_maincpu->set_input_line(5, HOLD_LINE);
	}
}

INTERRUPT_GEN_MEMBER(overdriv_state::cpuB_interrupt)
{
	// this doesn't get turned on until the irq has happened? wrong irq?
}

void overdriv_state::cpuA_ctrl_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
	if (ACCESSING_BITS_0_7)
	{
		/* bit 0 probably enables the second 68000 */
		m_subcpu->set_input_line(INPUT_LINE_RESET, (data & 0x01) ? CLEAR_LINE : ASSERT_LINE);

		/* bit 1 is clear during service mode - function unknown */

		m_led = BIT(data, 3);
		machine().bookkeeping().coin_counter_w(0, data & 0x10);
		machine().bookkeeping().coin_counter_w(1, data & 0x20);

//logerror("%s: write %04x to cpuA_ctrl_w\n",machine().describe_context(),data);
	}
}

uint16_t overdriv_state::cpuB_ctrl_r()
{
	return m_cpuB_ctrl;
}

void overdriv_state::cpuB_ctrl_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
	COMBINE_DATA(&m_cpuB_ctrl);

	if (ACCESSING_BITS_0_7)
	{
		/* bit 0 = enable sprite ROM reading */
		m_k053246->k053246_set_objcha_line( (data & 0x01) ? ASSERT_LINE : CLEAR_LINE);

		/* bit 1 used but unknown (irq enable?) */

		/* other bits unused? */
	}
}

void overdriv_state::overdriv_soundirq_w(uint16_t data)
{
	m_audiocpu->set_input_line(M6809_IRQ_LINE, ASSERT_LINE);
}




void overdriv_state::slave_irq4_assert_w(uint16_t data)
{
	// used in-game
	m_subcpu->set_input_line(4, HOLD_LINE);
}

void overdriv_state::slave_irq5_assert_w(uint16_t data)
{
	// tests GFX ROMs with this irq (indeed enabled only in test mode)
	m_subcpu->set_input_line(5, HOLD_LINE);
}


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

  Callbacks for the K053247

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

K053246_CB_MEMBER(overdriv_state::sprite_callback)
{
	int pri = (*color & 0xffe0) >> 5;   /* ??????? */
	if (pri)
		*priority_mask = 0x02;
	else
		*priority_mask = 0x00;

	*color = m_sprite_colorbase + (*color & 0x001f);
}


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

  Callbacks for the K051316

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

K051316_CB_MEMBER(overdriv_state::zoom_callback_1)
{
	*flags = (*color & 0x40) ? TILE_FLIPX : 0;
	*code |= ((*color & 0x03) << 8);
	*color = m_zoom_colorbase[0] + ((*color & 0x3c) >> 2);
}

K051316_CB_MEMBER(overdriv_state::zoom_callback_2)
{
	*flags = (*color & 0x40) ? TILE_FLIPX : 0;
	*code |= ((*color & 0x03) << 8);
	*color = m_zoom_colorbase[1] + ((*color & 0x3c) >> 2);
}


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

  Display refresh

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

uint32_t overdriv_state::screen_update_overdriv(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	m_sprite_colorbase  = m_k053251->get_palette_index(k053251_device::CI0);
	m_road_colorbase[1] = m_k053251->get_palette_index(k053251_device::CI1);
	m_road_colorbase[0] = m_k053251->get_palette_index(k053251_device::CI2);
	m_zoom_colorbase[1] = m_k053251->get_palette_index(k053251_device::CI3);
	m_zoom_colorbase[0] = m_k053251->get_palette_index(k053251_device::CI4);

	screen.priority().fill(0, cliprect);

	m_k051316_1->zoom_draw(screen, bitmap, cliprect, TILEMAP_DRAW_OPAQUE, 0);
	m_k051316_2->zoom_draw(screen, bitmap, cliprect, 0, 1);

	m_k053246->k053247_sprites_draw( bitmap,cliprect);
	return 0;
}


void overdriv_state::overdriv_master_map(address_map &map)
{
	map(0x000000, 0x03ffff).rom();
	map(0x040000, 0x043fff).ram();                 /* work RAM */
	map(0x080000, 0x080fff).ram().w("palette", FUNC(palette_device::write16)).share("palette");
	map(0x0c0000, 0x0c0001).portr("INPUTS");
	map(0x0c0002, 0x0c0003).portr("SYSTEM");
	map(0x0e0000, 0x0e0001).nopw();            /* unknown (always 0x30) */
	map(0x100000, 0x10001f).rw(m_k053252, FUNC(k053252_device::read), FUNC(k053252_device::write)).umask16(0x00ff); /* 053252? (LSB) */
	map(0x140000, 0x140001).nopw(); //watchdog reset?
	map(0x180001, 0x180001).rw("adc", FUNC(adc0804_device::read), FUNC(adc0804_device::write));
	map(0x1c0000, 0x1c001f).w(m_k051316_1, FUNC(k051316_device::ctrl_w)).umask16(0xff00);
	map(0x1c8000, 0x1c801f).w(m_k051316_2, FUNC(k051316_device::ctrl_w)).umask16(0xff00);
	map(0x1d0000, 0x1d001f).w(m_k053251, FUNC(k053251_device::write)).umask16(0xff00);
	map(0x1d8000, 0x1d8003).rw("k053260_1", FUNC(k053260_device::main_read), FUNC(k053260_device::main_write)).umask16(0x00ff);
	map(0x1e0000, 0x1e0003).rw("k053260_2", FUNC(k053260_device::main_read), FUNC(k053260_device::main_write)).umask16(0x00ff);
	map(0x1e8000, 0x1e8001).w(FUNC(overdriv_state::overdriv_soundirq_w));
	map(0x1f0000, 0x1f0001).w(FUNC(overdriv_state::cpuA_ctrl_w));  /* halt cpu B, coin counter, start lamp, other? */
	map(0x1f8000, 0x1f8001).w(FUNC(overdriv_state::eeprom_w));
	map(0x200000, 0x203fff).ram().share("share1");
	map(0x210000, 0x210fff).rw(m_k051316_1, FUNC(k051316_device::read), FUNC(k051316_device::write)).umask16(0xff00);
	map(0x218000, 0x218fff).rw(m_k051316_2, FUNC(k051316_device::read), FUNC(k051316_device::write)).umask16(0xff00);
	map(0x220000, 0x220fff).r(m_k051316_1, FUNC(k051316_device::rom_r)).umask16(0xff00);
	map(0x228000, 0x228fff).r(m_k051316_2, FUNC(k051316_device::rom_r)).umask16(0xff00);
	map(0x230000, 0x230001).w(FUNC(overdriv_state::slave_irq4_assert_w));
	map(0x238000, 0x238001).w(FUNC(overdriv_state::slave_irq5_assert_w));
}

TIMER_CALLBACK_MEMBER(overdriv_state::objdma_end_cb )
{
	m_subcpu->set_input_line(6, HOLD_LINE);
}

void overdriv_state::objdma_w(uint8_t data)
{
	if(data & 0x10)
		m_objdma_end_timer->adjust(attotime::from_usec(100));

	m_k053246->k053246_w(5,data);
}

void overdriv_state::overdriv_slave_map(address_map &map)
{
	map(0x000000, 0x03ffff).rom();
	map(0x080000, 0x083fff).ram(); /* work RAM */
	map(0x0c0000, 0x0c1fff).ram(); //.rw("k053250_1", FUNC(k053250_device::ram_r), FUNC(k053250_device::ram_w));
	map(0x100000, 0x10000f).rw("k053250_1", FUNC(k053250_device::reg_r), FUNC(k053250_device::reg_w));
	map(0x108000, 0x10800f).rw("k053250_2", FUNC(k053250_device::reg_r), FUNC(k053250_device::reg_w));
	map(0x118000, 0x118fff).rw(m_k053246, FUNC(k053247_device::k053247_word_r), FUNC(k053247_device::k053247_word_w)); // data gets copied to sprite chip with DMA..
	map(0x120000, 0x120001).r(m_k053246, FUNC(k053247_device::k053246_r));
	map(0x128000, 0x128001).rw(FUNC(overdriv_state::cpuB_ctrl_r), FUNC(overdriv_state::cpuB_ctrl_w)); /* enable K053247 ROM reading, plus something else */
	map(0x130000, 0x130007).rw(m_k053246, FUNC(k053247_device::k053246_r), FUNC(k053247_device::k053246_w));
	map(0x130005, 0x130005).w(FUNC(overdriv_state::objdma_w));
	//map(0x140000, 0x140001) used in later stages, set after writes at 0x208000-0x20bfff range
	map(0x200000, 0x203fff).ram().share("share1");
	map(0x208000, 0x20bfff).ram(); // sprite indirect table?
	map(0x218000, 0x219fff).r("k053250_1", FUNC(k053250_device::rom_r));
	map(0x220000, 0x221fff).r("k053250_2", FUNC(k053250_device::rom_r));
}

void overdriv_state::sound_ack_w(uint8_t data)
{
	m_audiocpu->set_input_line(M6809_IRQ_LINE, CLEAR_LINE);
}

void overdriv_state::overdriv_sound_map(address_map &map)
{
	map(0x0000, 0x0000).w(FUNC(overdriv_state::sound_ack_w));
	// 0x012 read during explosions
	// 0x180
	map(0x0200, 0x0201).rw("ymsnd", FUNC(ym2151_device::read), FUNC(ym2151_device::write));
	map(0x0400, 0x042f).rw("k053260_1", FUNC(k053260_device::read), FUNC(k053260_device::write));
	map(0x0600, 0x062f).rw("k053260_2", FUNC(k053260_device::read), FUNC(k053260_device::write));
	map(0x0800, 0x0fff).ram();
	map(0x1000, 0xffff).rom();
}

/* Both IPT_START1 assignments are needed. The game will reset during */
/* the "continue" sequence if the assignment on the first port        */
/* is missing.                                                        */

static INPUT_PORTS_START( overdriv )
	PORT_START("INPUTS")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON3 ) PORT_TOGGLE
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_er5911_device, do_read)
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_er5911_device, ready_read)

	PORT_START("SYSTEM")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_SERVICE1 )
	PORT_SERVICE_NO_TOGGLE( 0x10, IP_ACTIVE_LOW )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_DEVICE_MEMBER("adc", adc0804_device, intr_r)

	PORT_START("PADDLE")
	PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_SENSITIVITY(100) PORT_KEYDELTA(50)
	// POST checks if paddle is at center otherwise throws a "VOLUME ERROR"

	PORT_START( "EEPROMOUT" )
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_OUTPUT ) PORT_WRITE_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_er5911_device, di_write)
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_OUTPUT ) PORT_WRITE_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_er5911_device, clk_write)
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_OUTPUT ) PORT_WRITE_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_er5911_device, cs_write)
INPUT_PORTS_END


void overdriv_state::machine_start()
{
	m_led.resolve();
	m_objdma_end_timer = timer_alloc(FUNC(overdriv_state::objdma_end_cb), this);

	save_item(NAME(m_cpuB_ctrl));
	save_item(NAME(m_sprite_colorbase));
	save_item(NAME(m_zoom_colorbase));
	save_item(NAME(m_road_colorbase));
	save_item(NAME(m_fake_timer));
}

void overdriv_state::machine_reset()
{
	m_cpuB_ctrl = 0;
	m_sprite_colorbase = 0;
	m_zoom_colorbase[0] = 0;
	m_zoom_colorbase[1] = 0;
	m_road_colorbase[0] = 0;
	m_road_colorbase[1] = 0;
	m_fake_timer = 0;

	/* start with cpu B halted */
	m_subcpu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
}


void overdriv_state::overdriv(machine_config &config)
{
	/* basic machine hardware */
	M68000(config, m_maincpu, XTAL(24'000'000)/2); /* 12 MHz */
	m_maincpu->set_addrmap(AS_PROGRAM, &overdriv_state::overdriv_master_map);
	TIMER(config, "scantimer").configure_scanline(FUNC(overdriv_state::overdriv_cpuA_scanline), "screen", 0, 1);

	M68000(config, m_subcpu, XTAL(24'000'000)/2);  /* 12 MHz */
	m_subcpu->set_addrmap(AS_PROGRAM, &overdriv_state::overdriv_slave_map);
	//m_subcpu->set_vblank_int("screen", FUNC(overdriv_state::cpuB_interrupt));
	/* IRQ 5 and 6 are generated by the main CPU. */
	/* IRQ 5 is used only in test mode, to request the checksums of the gfx ROMs. */

	MC6809E(config, m_audiocpu, XTAL(3'579'545));                             /* 1.789 MHz?? This might be the right speed, but ROM testing */
	m_audiocpu->set_addrmap(AS_PROGRAM, &overdriv_state::overdriv_sound_map); /* takes a little too much (the counter wraps from 0000 to 9999). */
																			  /* This might just mean that the video refresh rate is less than */
																			  /* 60 fps, that's how I fixed it for now. */

	config.set_maximum_quantum(attotime::from_hz(12000));

	EEPROM_ER5911_16BIT(config, "eeprom").default_data(overdriv_default_eeprom, 128);

	ADC0804(config, "adc", RES_K(10), CAP_P(150)).vin_callback().set_ioport("PADDLE");

	/* video hardware */
	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
	screen.set_raw(XTAL(24'000'000)/4,384,0,305,264,0,224);
	screen.set_screen_update(FUNC(overdriv_state::screen_update_overdriv));
	screen.set_palette("palette");

	PALETTE(config, "palette").set_format(palette_device::xBGR_555, 2048).enable_shadows();

	K053246(config, m_k053246, 0);
	m_k053246->set_sprite_callback(FUNC(overdriv_state::sprite_callback));
	m_k053246->set_config(NORMAL_PLANE_ORDER, 77, 22);
	m_k053246->set_palette("palette");

	K051316(config, m_k051316_1, 0);
	m_k051316_1->set_palette("palette");
	m_k051316_1->set_offsets(14, -1);
	m_k051316_1->set_wrap(1);
	m_k051316_1->set_zoom_callback(FUNC(overdriv_state::zoom_callback_1));

	K051316(config, m_k051316_2, 0);
	m_k051316_2->set_palette("palette");
	m_k051316_2->set_offsets(15, 1);
	m_k051316_2->set_zoom_callback(FUNC(overdriv_state::zoom_callback_2));

	K053251(config, m_k053251, 0);

	K053250(config, "k053250_1", 0, "palette", m_screen, 0, 0);
	K053250(config, "k053250_2", 0, "palette", m_screen, 0, 0);

	K053252(config, m_k053252, XTAL(24'000'000)/4);
	m_k053252->set_offsets(13*8, 2*8);

	/* sound hardware */
	SPEAKER(config, "lspeaker").front_left();
	SPEAKER(config, "rspeaker").front_right();

	YM2151(config, "ymsnd", XTAL(3'579'545)).add_route(0, "lspeaker", 0.5).add_route(1, "rspeaker", 0.5);

	k053260_device &k053260_1(K053260(config, "k053260_1", XTAL(3'579'545)));
	k053260_1.set_device_rom_tag("k053260");
	k053260_1.add_route(0, "lspeaker", 0.35);
	k053260_1.add_route(1, "rspeaker", 0.35);

	k053260_device &k053260_2(K053260(config, "k053260_2", XTAL(3'579'545)));
	k053260_2.set_device_rom_tag("k053260");
	k053260_2.add_route(0, "lspeaker", 0.35);
	k053260_2.add_route(1, "rspeaker", 0.35);
}



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

  Game driver(s)

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

ROM_START( overdriv )
	ROM_REGION( 0x40000, "maincpu", 0 )
	ROM_LOAD16_BYTE( "789_n05.d17", 0x00000, 0x20000, CRC(f7885713) SHA1(8e84929dcc6ab889c3e11c450d22c56b183b0198) )
	ROM_LOAD16_BYTE( "789_n04.b17", 0x00001, 0x20000, CRC(aefe87a6) SHA1(1bdf5a1f4c5e2b84d02b2981b3be91ed2406a1f8) )

	ROM_REGION( 0x40000, "sub", 0 )
	ROM_LOAD16_BYTE( "789_e09.l10", 0x00000, 0x20000, CRC(46fb7e88) SHA1(f706a76aff9bec64abe6da325cba0715d6e6ed0a) ) /* also found labeled as "4" as well as "7" */
	ROM_LOAD16_BYTE( "789_e08.k10", 0x00001, 0x20000, CRC(24427195) SHA1(48f4f81729acc0e497b40fddbde11242c5c4c573) ) /* also found labeled as "3" as well as "6" */

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "789_e01.e4", 0x00000, 0x10000, CRC(1085f069) SHA1(27228cedb357ff2e130a4bd6d8aa01cf537e034f) ) /* also found labeled as "5" */

	ROM_REGION( 0x400000, "k053246", 0 )   /* graphics (addressable by the CPU) */
	ROM_LOAD64_WORD( "789e12.r1",  0x000000, 0x100000, CRC(14a10fb2) SHA1(03fb9c15514c5ecc2d9ae4a53961c4bbb49cec73) )    /* sprites */
	ROM_LOAD64_WORD( "789e13.r4",  0x000002, 0x100000, CRC(6314a628) SHA1(f8a8918998c266109348c77427a7696b503daeb3) )
	ROM_LOAD64_WORD( "789e14.r10", 0x000004, 0x100000, CRC(b5eca14b) SHA1(a1c5f5e9cd8bbcfc875e2acb33be024724da63aa) )
	ROM_LOAD64_WORD( "789e15.r15", 0x000006, 0x100000, CRC(5d93e0c3) SHA1(d5cb7666c0c28fd465c860c7f9dbb18a7f739a93) )

	ROM_REGION( 0x020000, "k051316_1", 0 )
	ROM_LOAD( "789e06.a21", 0x000000, 0x020000, CRC(14a085e6) SHA1(86dad6f223e13ff8af7075c3d99bb0a83784c384) )    /* zoom/rotate */

	ROM_REGION( 0x020000, "k051316_2", 0 )
	ROM_LOAD( "789e07.c23", 0x000000, 0x020000, CRC(8a6ceab9) SHA1(1a52b7361f71a6126cd648a76af00223d5b25c7a) )    /* zoom/rotate */

	ROM_REGION( 0x0c0000, "k053250_1", 0 )
	ROM_LOAD( "789e18.p22", 0x000000, 0x040000, CRC(985a4a75) SHA1(b726166c295be6fbec38a9d11098cc4a4a5de456) )
	ROM_LOAD( "789e19.r22", 0x040000, 0x040000, CRC(15c54ea2) SHA1(5b10bd28e48e51613359820ba8c75d4a91c2d322) )
	ROM_LOAD( "789e20.s22", 0x080000, 0x040000, CRC(ea204acd) SHA1(52b8c30234eaefcba1074496028a4ac2bca48e95) )

	ROM_REGION( 0x080000, "k053250_2", 0 )
	ROM_LOAD( "789e17.p17", 0x000000, 0x040000, CRC(04c07248) SHA1(873445002cbf90c9fc5a35bf4a8f6c43193ee342) )
	ROM_LOAD( "789e16.p12", 0x040000, 0x040000, CRC(9348dee1) SHA1(367193373e28962b5b0e54cc15d68ed88ab83f12) )

	ROM_REGION( 0x200000, "k053260", 0 ) /* 053260 samples */
	ROM_LOAD( "789e03.j1", 0x000000, 0x100000, CRC(51ebfebe) SHA1(17f0c23189258e801f48d5833fe934e7a48d071b) )
	ROM_LOAD( "789e02.f1", 0x100000, 0x100000, CRC(bdd3b5c6) SHA1(412332d64052c0a3714f4002c944b0e7d32980a4) )
ROM_END

ROM_START( overdriva )
	ROM_REGION( 0x40000, "maincpu", 0 )
	ROM_LOAD16_BYTE( "2.d17", 0x00000, 0x20000, CRC(77f18f3f) SHA1(a8c91435573c7851a7864d07eeacfb2f142abbe2) )
	ROM_LOAD16_BYTE( "1.b17", 0x00001, 0x20000, CRC(4f44e6ad) SHA1(9fa871f55e6b2ec353dd979ded568cd9da83f5d6) ) /* also found labeled as "3" */

	ROM_REGION( 0x40000, "sub", 0 )
	ROM_LOAD16_BYTE( "789_e09.l10", 0x00000, 0x20000, CRC(46fb7e88) SHA1(f706a76aff9bec64abe6da325cba0715d6e6ed0a) ) /* also found labeled as "4" as well as "7" */
	ROM_LOAD16_BYTE( "789_e08.k10", 0x00001, 0x20000, CRC(24427195) SHA1(48f4f81729acc0e497b40fddbde11242c5c4c573) ) /* also found labeled as "3" as well as "6" */

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "789_e01.e4", 0x00000, 0x10000, CRC(1085f069) SHA1(27228cedb357ff2e130a4bd6d8aa01cf537e034f) ) /* also found labeled as "5" */

	ROM_REGION( 0x400000, "k053246", 0 )   /* graphics (addressable by the CPU) */
	ROM_LOAD64_WORD( "789e12.r1",  0x000000, 0x100000, CRC(14a10fb2) SHA1(03fb9c15514c5ecc2d9ae4a53961c4bbb49cec73) )    /* sprites */
	ROM_LOAD64_WORD( "789e13.r4",  0x000002, 0x100000, CRC(6314a628) SHA1(f8a8918998c266109348c77427a7696b503daeb3) )
	ROM_LOAD64_WORD( "789e14.r10", 0x000004, 0x100000, CRC(b5eca14b) SHA1(a1c5f5e9cd8bbcfc875e2acb33be024724da63aa) )
	ROM_LOAD64_WORD( "789e15.r15", 0x000006, 0x100000, CRC(5d93e0c3) SHA1(d5cb7666c0c28fd465c860c7f9dbb18a7f739a93) )

	ROM_REGION( 0x020000, "k051316_1", 0 )
	ROM_LOAD( "789e06.a21", 0x000000, 0x020000, CRC(14a085e6) SHA1(86dad6f223e13ff8af7075c3d99bb0a83784c384) )    /* zoom/rotate */

	ROM_REGION( 0x020000, "k051316_2", 0 )
	ROM_LOAD( "789e07.c23", 0x000000, 0x020000, CRC(8a6ceab9) SHA1(1a52b7361f71a6126cd648a76af00223d5b25c7a) )    /* zoom/rotate */

	ROM_REGION( 0x0c0000, "k053250_1", 0 )
	ROM_LOAD( "789e18.p22", 0x000000, 0x040000, CRC(985a4a75) SHA1(b726166c295be6fbec38a9d11098cc4a4a5de456) )
	ROM_LOAD( "789e19.r22", 0x040000, 0x040000, CRC(15c54ea2) SHA1(5b10bd28e48e51613359820ba8c75d4a91c2d322) )
	ROM_LOAD( "789e20.s22", 0x080000, 0x040000, CRC(ea204acd) SHA1(52b8c30234eaefcba1074496028a4ac2bca48e95) )

	ROM_REGION( 0x080000, "k053250_2", 0 )
	ROM_LOAD( "789e17.p17", 0x000000, 0x040000, CRC(04c07248) SHA1(873445002cbf90c9fc5a35bf4a8f6c43193ee342) )
	ROM_LOAD( "789e16.p12", 0x040000, 0x040000, CRC(9348dee1) SHA1(367193373e28962b5b0e54cc15d68ed88ab83f12) )

	ROM_REGION( 0x200000, "k053260", 0 ) /* 053260 samples */
	ROM_LOAD( "789e03.j1", 0x000000, 0x100000, CRC(51ebfebe) SHA1(17f0c23189258e801f48d5833fe934e7a48d071b) )
	ROM_LOAD( "789e02.f1", 0x100000, 0x100000, CRC(bdd3b5c6) SHA1(412332d64052c0a3714f4002c944b0e7d32980a4) )
ROM_END

ROM_START( overdrivb )
	ROM_REGION( 0x40000, "maincpu", 0 )
	ROM_LOAD16_BYTE( "4.d17", 0x00000, 0x20000, CRC(93c8e892) SHA1(fb41bb13787b93f533b962c3119e6b9f61e2f3f3) )
	ROM_LOAD16_BYTE( "3.b17", 0x00001, 0x20000, CRC(4f44e6ad) SHA1(9fa871f55e6b2ec353dd979ded568cd9da83f5d6) ) /* also found labeled as "1" */

	ROM_REGION( 0x40000, "sub", 0 )
	ROM_LOAD16_BYTE( "789_e09.l10", 0x00000, 0x20000, CRC(46fb7e88) SHA1(f706a76aff9bec64abe6da325cba0715d6e6ed0a) ) /* also found labeled as "4" as well as "7" */
	ROM_LOAD16_BYTE( "789_e08.k10", 0x00001, 0x20000, CRC(24427195) SHA1(48f4f81729acc0e497b40fddbde11242c5c4c573) ) /* also found labeled as "3" as well as "6" */

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "789_e01.e4", 0x00000, 0x10000, CRC(1085f069) SHA1(27228cedb357ff2e130a4bd6d8aa01cf537e034f) ) /* also found labeled as "5" */

	ROM_REGION( 0x400000, "k053246", 0 )   /* graphics (addressable by the CPU) */
	ROM_LOAD64_WORD( "789e12.r1",  0x000000, 0x100000, CRC(14a10fb2) SHA1(03fb9c15514c5ecc2d9ae4a53961c4bbb49cec73) )    /* sprites */
	ROM_LOAD64_WORD( "789e13.r4",  0x000002, 0x100000, CRC(6314a628) SHA1(f8a8918998c266109348c77427a7696b503daeb3) )
	ROM_LOAD64_WORD( "789e14.r10", 0x000004, 0x100000, CRC(b5eca14b) SHA1(a1c5f5e9cd8bbcfc875e2acb33be024724da63aa) )
	ROM_LOAD64_WORD( "789e15.r15", 0x000006, 0x100000, CRC(5d93e0c3) SHA1(d5cb7666c0c28fd465c860c7f9dbb18a7f739a93) )

	ROM_REGION( 0x020000, "k051316_1", 0 )
	ROM_LOAD( "789e06.a21", 0x000000, 0x020000, CRC(14a085e6) SHA1(86dad6f223e13ff8af7075c3d99bb0a83784c384) )    /* zoom/rotate */

	ROM_REGION( 0x020000, "k051316_2", 0 )
	ROM_LOAD( "789e07.c23", 0x000000, 0x020000, CRC(8a6ceab9) SHA1(1a52b7361f71a6126cd648a76af00223d5b25c7a) )    /* zoom/rotate */

	ROM_REGION( 0x0c0000, "k053250_1", 0 )
	ROM_LOAD( "789e18.p22", 0x000000, 0x040000, CRC(985a4a75) SHA1(b726166c295be6fbec38a9d11098cc4a4a5de456) )
	ROM_LOAD( "789e19.r22", 0x040000, 0x040000, CRC(15c54ea2) SHA1(5b10bd28e48e51613359820ba8c75d4a91c2d322) )
	ROM_LOAD( "789e20.s22", 0x080000, 0x040000, CRC(ea204acd) SHA1(52b8c30234eaefcba1074496028a4ac2bca48e95) )

	ROM_REGION( 0x080000, "k053250_2", 0 )
	ROM_LOAD( "789e17.p17", 0x000000, 0x040000, CRC(04c07248) SHA1(873445002cbf90c9fc5a35bf4a8f6c43193ee342) )
	ROM_LOAD( "789e16.p12", 0x040000, 0x040000, CRC(9348dee1) SHA1(367193373e28962b5b0e54cc15d68ed88ab83f12) )

	ROM_REGION( 0x200000, "k053260", 0 ) /* 053260 samples */
	ROM_LOAD( "789e03.j1", 0x000000, 0x100000, CRC(51ebfebe) SHA1(17f0c23189258e801f48d5833fe934e7a48d071b) )
	ROM_LOAD( "789e02.f1", 0x100000, 0x100000, CRC(bdd3b5c6) SHA1(412332d64052c0a3714f4002c944b0e7d32980a4) )
ROM_END

} // anonymous namespace


GAMEL( 1990, overdriv,         0, overdriv, overdriv, overdriv_state, empty_init, ROT90, "Konami", "Over Drive (set 1)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE, layout_overdriv ) // US version
GAMEL( 1990, overdriva, overdriv, overdriv, overdriv, overdriv_state, empty_init, ROT90, "Konami", "Over Drive (set 2)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE, layout_overdriv ) // Overseas?
GAMEL( 1990, overdrivb, overdriv, overdriv, overdriv, overdriv_state, empty_init, ROT90, "Konami", "Over Drive (set 3)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE, layout_overdriv ) // Overseas?