summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/r2dtank.c
blob: 391046d30f15081b6e52c835f370276f9e0217d6 (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
/*******************************************************************
R2D Tank (c) 1980 Sigma Ent. Inc.

driver by: David Haywood & Pierpaolo Prazzoli


from the readme
----------------------------------------------------
Orca board number OVG-17A

r2d1.1c is ROM #1 at board position 1C, and so on.

1 = 2716
2 = 2732
3 = 2732
4 = 2732
5 = 2716 Sound

CPU = 6809
other = HD46505SP (6845) (CRT controller)
other = MB14282(x2)
other = HD468458SP
other = MB14282
other = MB14368
other = HD6821 (x2) (PIA)
other = HD46802
other = M5L8226 (x2)
RAM = 4116 (x11)

----------------------------------------------------
********************************************************************/

#include "emu.h"
#include "machine/rescap.h"
#include "machine/6821pia.h"
#include "machine/74123.h"
#include "video/mc6845.h"
#include "cpu/m6800/m6800.h"
#include "cpu/m6809/m6809.h"
#include "sound/ay8910.h"
#include "machine/nvram.h"


#define NUM_PENS    (8)

#define LOG_AUDIO_COMM  (0)

#define MAIN_CPU_MASTER_CLOCK   (11200000)
#define PIXEL_CLOCK             (MAIN_CPU_MASTER_CLOCK / 2)
#define CRTC_CLOCK              (MAIN_CPU_MASTER_CLOCK / 16)

class r2dtank_state : public driver_device
{
public:
	r2dtank_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) ,
		m_videoram(*this, "videoram"),
		m_colorram(*this, "colorram"){ }

	required_shared_ptr<UINT8> m_videoram;
	required_shared_ptr<UINT8> m_colorram;
	UINT8 m_flipscreen;
	UINT32 m_ttl74123_output;
	UINT8 m_AY8910_selected;
	pen_t m_pens[NUM_PENS];
	DECLARE_READ8_MEMBER(audio_command_r);
	DECLARE_WRITE8_MEMBER(audio_command_w);
	DECLARE_READ8_MEMBER(audio_answer_r);
	DECLARE_WRITE8_MEMBER(audio_answer_w);
	DECLARE_CUSTOM_INPUT_MEMBER(get_ttl74123_output);
	DECLARE_WRITE_LINE_MEMBER(main_cpu_irq);
	DECLARE_WRITE8_MEMBER(AY8910_select_w);
	DECLARE_READ8_MEMBER(AY8910_port_r);
	DECLARE_WRITE8_MEMBER(AY8910_port_w);
	DECLARE_WRITE_LINE_MEMBER(flipscreen_w);
	DECLARE_WRITE_LINE_MEMBER(display_enable_changed);
	DECLARE_WRITE8_MEMBER(pia_comp_w);
	virtual void machine_start();
	DECLARE_WRITE8_MEMBER(ttl74123_output_changed);
};



/*************************************
 *
 *  Prototypes
 *
 *************************************/





/*************************************
 *
 *  Interrupt generation
 *
 *************************************/

WRITE_LINE_MEMBER(r2dtank_state::main_cpu_irq)
{
	pia6821_device *pia0 = machine().device<pia6821_device>("pia_main");
	pia6821_device *pia1 = machine().device<pia6821_device>("pia_audio");
	int combined_state = pia0->irq_a_state() | pia0->irq_b_state() |
							pia1->irq_a_state() | pia1->irq_b_state();

	machine().device("maincpu")->execute().set_input_line(M6809_IRQ_LINE,  combined_state ? ASSERT_LINE : CLEAR_LINE);
}



/*************************************
 *
 *  Audio system - CPU 1
 *
 *************************************/

READ8_MEMBER(r2dtank_state::audio_command_r)
{
	UINT8 ret = soundlatch_byte_r(space, 0);

if (LOG_AUDIO_COMM) logerror("%08X  CPU#1  Audio Command Read: %x\n", space.device().safe_pc(), ret);

	return ret;
}


WRITE8_MEMBER(r2dtank_state::audio_command_w)
{
	soundlatch_byte_w(space, 0, ~data);
	machine().device("audiocpu")->execute().set_input_line(M6800_IRQ_LINE, HOLD_LINE);

if (LOG_AUDIO_COMM) logerror("%08X   CPU#0  Audio Command Write: %x\n", space.device().safe_pc(), data^0xff);
}


READ8_MEMBER(r2dtank_state::audio_answer_r)
{
	UINT8 ret = soundlatch2_byte_r(space, 0);
if (LOG_AUDIO_COMM) logerror("%08X  CPU#0  Audio Answer Read: %x\n", space.device().safe_pc(), ret);

	return ret;
}


WRITE8_MEMBER(r2dtank_state::audio_answer_w)
{
	/* HACK - prevents lock-up, but causes game to end some in-between sreens prematurely */
	if (space.device().safe_pc() == 0xfb12)
		data = 0x00;

	soundlatch2_byte_w(space, 0, data);
	machine().device("maincpu")->execute().set_input_line(M6809_IRQ_LINE, HOLD_LINE);

if (LOG_AUDIO_COMM) logerror("%08X  CPU#1  Audio Answer Write: %x\n", space.device().safe_pc(), data);
}


WRITE8_MEMBER(r2dtank_state::AY8910_select_w)
{
	/* not sure what all the bits mean:
	   D0 - ????? definetely used
	   D1 - not used?
	   D2 - selects ay8910 control or port
	   D3 - selects ay8910 #0
	   D4 - selects ay8910 #1
	   D5-D7 - not used */
	m_AY8910_selected = data;

if (LOG_AUDIO_COMM) logerror("%s:  CPU#1  AY8910_select_w: %x\n", machine().describe_context(), data);
}


READ8_MEMBER(r2dtank_state::AY8910_port_r)
{
	UINT8 ret = 0;

	if (m_AY8910_selected & 0x08)
		ret = ay8910_r(machine().device("ay1"), space, 0);

	if (m_AY8910_selected & 0x10)
		ret = ay8910_r(machine().device("ay2"), space, 0);

	return ret;
}


WRITE8_MEMBER(r2dtank_state::AY8910_port_w)
{
	if (m_AY8910_selected & 0x08)
		ay8910_data_address_w(machine().device("ay1"), space, m_AY8910_selected >> 2, data);

	if (m_AY8910_selected & 0x10)
		ay8910_data_address_w(machine().device("ay2"), space, m_AY8910_selected >> 2, data);
}


static const ay8910_interface ay8910_1_interface =
{
	AY8910_LEGACY_OUTPUT,
	AY8910_DEFAULT_LOADS,
	DEVCB_INPUT_PORT("DSWB"),
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL
};


static const ay8910_interface ay8910_2_interface =
{
	AY8910_LEGACY_OUTPUT,
	AY8910_DEFAULT_LOADS,
	DEVCB_INPUT_PORT("IN1"),
	DEVCB_INPUT_PORT("DSWA"),
	DEVCB_NULL,
	DEVCB_NULL
};



/*************************************
 *
 *  74123
 *
 *  This timer is responsible for
 *  delaying the PIA1's port input.
 *  This delay ensures that
 *  CA1 is only changed in the VBLANK
 *  region, but not in HBLANK
 *
 *************************************/

WRITE8_MEMBER(r2dtank_state::ttl74123_output_changed)
{
	pia6821_device *pia = machine().device<pia6821_device>("pia_main");
	pia->ca1_w(data);
	m_ttl74123_output = data;
}


CUSTOM_INPUT_MEMBER(r2dtank_state::get_ttl74123_output)
{
	return m_ttl74123_output;
}


static const ttl74123_interface ttl74123_intf =
{
	TTL74123_GROUNDED,  /* the hook up type */
	RES_K(22),          /* resistor connected to RCext */
	CAP_U(0.01),        /* capacitor connected to Cext and RCext */
	1,                  /* A pin - driven by the CRTC */
	1,                  /* B pin - pulled high */
	1,                  /* Clear pin - pulled high */
	DEVCB_DRIVER_MEMBER(r2dtank_state,ttl74123_output_changed)
};



/*************************************
 *
 *  Machine start
 *
 *************************************/

static const pia6821_interface pia_main_intf =
{
	DEVCB_INPUT_PORT("IN0"),        /* port A in */
	DEVCB_INPUT_PORT("IN1"),    /* port B in */
	DEVCB_NULL,     /* line CA1 in */
	DEVCB_NULL,     /* line CB1 in */
	DEVCB_NULL,     /* line CA2 in */
	DEVCB_NULL,     /* line CB2 in */
	DEVCB_NULL,     /* port A out */
	DEVCB_NULL,     /* port B out */
	DEVCB_NULL,     /* line CA2 out */
	DEVCB_DRIVER_LINE_MEMBER(r2dtank_state,flipscreen_w),       /* port CB2 out */
	DEVCB_DRIVER_LINE_MEMBER(r2dtank_state,main_cpu_irq),       /* IRQA */
	DEVCB_DRIVER_LINE_MEMBER(r2dtank_state,main_cpu_irq)        /* IRQB */
};


static const pia6821_interface pia_audio_intf =
{
	DEVCB_DRIVER_MEMBER(r2dtank_state,AY8910_port_r),       /* port A in */
	DEVCB_NULL,     /* port B in */
	DEVCB_NULL,     /* line CA1 in */
	DEVCB_NULL,     /* line CB1 in */
	DEVCB_NULL,     /* line CA2 in */
	DEVCB_NULL,     /* line CB2 in */
	DEVCB_DRIVER_MEMBER(r2dtank_state,AY8910_port_w),       /* port A out */
	DEVCB_DRIVER_MEMBER(r2dtank_state,AY8910_select_w),     /* port B out */
	DEVCB_NULL,     /* line CA2 out */
	DEVCB_NULL,     /* port CB2 out */
	DEVCB_DRIVER_LINE_MEMBER(r2dtank_state,main_cpu_irq),       /* IRQA */
	DEVCB_DRIVER_LINE_MEMBER(r2dtank_state,main_cpu_irq)        /* IRQB */
};


void r2dtank_state::machine_start()
{
	/* setup for save states */
	state_save_register_global(machine(), m_flipscreen);
	state_save_register_global(machine(), m_ttl74123_output);
	state_save_register_global(machine(), m_AY8910_selected);
}



/*************************************
 *
 *  Video system
 *
 *************************************/


WRITE_LINE_MEMBER(r2dtank_state::flipscreen_w)
{
	m_flipscreen = !state;
}


static MC6845_BEGIN_UPDATE( begin_update )
{
	r2dtank_state *state = device->machine().driver_data<r2dtank_state>();
	/* create the pens */
	offs_t i;

	for (i = 0; i < NUM_PENS; i++)
	{
		state->m_pens[i] = MAKE_RGB(pal1bit(i >> 2), pal1bit(i >> 1), pal1bit(i >> 0));
	}

	return state->m_pens;
}


static MC6845_UPDATE_ROW( update_row )
{
	r2dtank_state *state = device->machine().driver_data<r2dtank_state>();
	UINT8 cx;

	pen_t *pens = (pen_t *)param;
	UINT8 x = 0;

	for (cx = 0; cx < x_count; cx++)
	{
		int i;
		UINT8 data, fore_color;

		/* the memory is hooked up to the MA, RA lines this way */
		offs_t offs = ((ma << 3) & 0x1f00) |
						((ra << 5) & 0x00e0) |
						((ma << 0) & 0x001f);

		if (state->m_flipscreen)
			offs = offs ^ 0x1fff;

		data = state->m_videoram[offs];
		fore_color = (state->m_colorram[offs] >> 5) & 0x07;

		for (i = 0; i < 8; i++)
		{
			UINT8 bit, color;

			if (state->m_flipscreen)
			{
				bit = data & 0x01;
				data = data >> 1;
			}
			else
			{
				bit = data & 0x80;
				data = data << 1;
			}

			color = bit ? fore_color : RGB_BLACK;
			bitmap.pix32(y, x) = pens[color];

			x = x + 1;
		}

		ma = ma + 1;
	}
}


WRITE_LINE_MEMBER(r2dtank_state::display_enable_changed)
{
	address_space &space = generic_space();
	ttl74123_a_w(machine().device("74123"), space, 0, state);
}


static MC6845_INTERFACE( mc6845_intf )
{
	"screen",               /* screen we are acting on */
	false,					/* show border area */
	8,                      /* number of pixels per video memory address */
	begin_update,           /* before pixel update callback */
	update_row,             /* row update callback */
	NULL,                   /* after pixel update callback */
	DEVCB_DRIVER_LINE_MEMBER(r2dtank_state,display_enable_changed), /* callback for display state changes */
	DEVCB_NULL,             /* callback for cursor state changes */
	DEVCB_NULL,             /* HSYNC callback */
	DEVCB_NULL,             /* VSYNC callback */
	NULL                    /* update address callback */
};



/*************************************
 *
 *  Memory handlers
 *
 *************************************/

WRITE8_MEMBER(r2dtank_state::pia_comp_w)
{
	device_t *device = machine().device("pia_main");
	downcast<pia6821_device *>(device)->write(machine().driver_data()->generic_space(), offset, ~data);
}


static ADDRESS_MAP_START( r2dtank_main_map, AS_PROGRAM, 8, r2dtank_state )
	AM_RANGE(0x0000, 0x1fff) AM_RAM AM_SHARE("videoram")
	AM_RANGE(0x2000, 0x3fff) AM_RAM
	AM_RANGE(0x4000, 0x5fff) AM_RAM AM_SHARE("colorram")
	AM_RANGE(0x6000, 0x7fff) AM_RAM
	AM_RANGE(0x8000, 0x8003) AM_DEVREAD("pia_main", pia6821_device, read) AM_WRITE(pia_comp_w)
	AM_RANGE(0x8004, 0x8004) AM_READWRITE(audio_answer_r, audio_command_w)
	AM_RANGE(0xb000, 0xb000) AM_DEVWRITE("crtc", mc6845_device, address_w)
	AM_RANGE(0xb001, 0xb001) AM_DEVWRITE("crtc", mc6845_device, register_w)
	AM_RANGE(0xc000, 0xc007) AM_RAM AM_SHARE("nvram")
	AM_RANGE(0xc800, 0xffff) AM_ROM
ADDRESS_MAP_END


static ADDRESS_MAP_START( r2dtank_audio_map, AS_PROGRAM, 8, r2dtank_state )
	AM_RANGE(0x0000, 0x007f) AM_RAM     /* internal RAM */
	AM_RANGE(0xd000, 0xd003) AM_DEVREADWRITE("pia_audio", pia6821_device, read, write)
	AM_RANGE(0xf000, 0xf000) AM_READWRITE(audio_command_r, audio_answer_w)
	AM_RANGE(0xf800, 0xffff) AM_ROM
ADDRESS_MAP_END



/*************************************
 *
 *  Port definition
 *
 *************************************/

static INPUT_PORTS_START( r2dtank )

	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_SERVICE_NO_TOGGLE(0x04, IP_ACTIVE_LOW)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, r2dtank_state,get_ttl74123_output, NULL)

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_COCKTAIL
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_COCKTAIL
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_COCKTAIL
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_COCKTAIL
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )

	PORT_START("DSWA")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "3" )
	PORT_DIPSETTING(    0x10, "4" )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( Free_Play ) )

	PORT_START("DSWB")
	PORT_DIPNAME( 0x01, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )

INPUT_PORTS_END



/*************************************
 *
 *  Machine driver
 *
 *************************************/

static MACHINE_CONFIG_START( r2dtank, r2dtank_state )
	MCFG_CPU_ADD("maincpu", M6809,3000000)       /* ?? too fast ? */
	MCFG_CPU_PROGRAM_MAP(r2dtank_main_map)

	MCFG_CPU_ADD("audiocpu", M6802,3000000)         /* ?? */
	MCFG_CPU_PROGRAM_MAP(r2dtank_audio_map)

	MCFG_NVRAM_ADD_0FILL("nvram")

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, 256, 0, 256, 256, 0, 256)   /* temporary, CRTC will configure screen */
	MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update)

	MCFG_MC6845_ADD("crtc", MC6845, CRTC_CLOCK, mc6845_intf)

	/* 74LS123 */

	MCFG_TTL74123_ADD("74123", ttl74123_intf)

	MCFG_PIA6821_ADD("pia_main", pia_main_intf)
	MCFG_PIA6821_ADD("pia_audio", pia_audio_intf)

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

	MCFG_SOUND_ADD("ay1", AY8910, (4000000 / 4))
	MCFG_SOUND_CONFIG(ay8910_1_interface)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)

	MCFG_SOUND_ADD("ay2", AY8910, (4000000 / 4))
	MCFG_SOUND_CONFIG(ay8910_2_interface)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)

MACHINE_CONFIG_END



/*************************************
 *
 *  ROM definition
 *
 *************************************/

ROM_START( r2dtank )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "r2d1.1c",      0xc800, 0x0800, CRC(20606a0f) SHA1(9a55e595c7ea332bdc89142338947be8a28a92a3) )
	ROM_LOAD( "r2d2.1a",      0xd000, 0x1000, CRC(7561c67f) SHA1(cccc7bbd7975db340fe571a4c31c25b41b2563b8) )
	ROM_LOAD( "r2d3.2c",      0xe000, 0x1000, CRC(fc53c538) SHA1(8f9a2edcf7a2cb2a8ddd084828b52f1bf45f434a) )
	ROM_LOAD( "r2d4.2a",      0xf000, 0x1000, CRC(56636225) SHA1(dcfc6e29b4c51a45cfbecf6790b7d88b89af433b) )

	ROM_REGION( 0x10000, "audiocpu", 0 )
	ROM_LOAD( "r2d5.7l",      0xf800, 0x0800, CRC(c49bed15) SHA1(ffa635a65c024c532bb13fb91bbd3e54923e81bf) )
ROM_END



/*************************************
 *
 *  Game driver
 *
 *************************************/

GAME( 1980, r2dtank, 0, r2dtank, r2dtank, driver_device, 0, ROT270, "Sigma Enterprises Inc.", "R2D Tank", GAME_SUPPORTS_SAVE)