summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/audio/scramble.c
blob: c83096b8d20aa453baaac65ff476f5babbc86777 (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
/***************************************************************************

  This file contains functions to emulate the sound hardware found on
  Scramble type boards.

  There are two types, one has 2 AY8910's and the other one has one of the
  AY8910's removed.  Interestingly, it appears that the one AY8910 version
  came after the 2 AY8910 one.  This is supported by the fact that in the
  one 8190 version, the filter system uses bits 6-11, while bits 0-5 are
  left unused.

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/7474.h"
#include "sound/flt_rc.h"
#include "sound/tms5110.h"
#include "sound/ay8910.h"
#include "includes/galaxold.h"

#define AD2083_TMS5110_CLOCK		XTAL_640kHz

/* The timer clock in Scramble which feeds the upper 4 bits of          */
/* AY-3-8910 port A is based on the same clock                          */
/* feeding the sound CPU Z80.  It is a divide by                        */
/* 5120, formed by a standard divide by 512,                            */
/* followed by a divide by 10 using a 4 bit                             */
/* bi-quinary count sequence. (See LS90 data sheet                      */
/* for an example).                                                     */
/*                                                                      */
/* Bit 4 comes from the output of the divide by 1024                    */
/*       0, 1, 0, 1, 0, 1, 0, 1, 0, 1                                   */
/* Bit 5 comes from the QC output of the LS90 producing a sequence of   */
/*       0, 0, 1, 1, 0, 0, 1, 1, 1, 0                                   */
/* Bit 6 comes from the QD output of the LS90 producing a sequence of   */
/*       0, 0, 0, 0, 1, 0, 0, 0, 0, 1                                   */
/* Bit 7 comes from the QA output of the LS90 producing a sequence of   */
/*       0, 0, 0, 0, 0, 1, 1, 1, 1, 1                                   */

static const int scramble_timer[10] =
{
	0x00, 0x10, 0x20, 0x30, 0x40, 0x90, 0xa0, 0xb0, 0xa0, 0xd0
};

READ8_DEVICE_HANDLER( scramble_portB_r )
{
	return scramble_timer[(device->machine->device<cpu_device>("audiocpu")->total_cycles()/512) % 10];
}



/* The timer clock in Frogger which feeds the upper 4 bits of           */
/* AY-3-8910 port A is based on the same clock                          */
/* feeding the sound CPU Z80.  It is a divide by                        */
/* 5120, formed by a standard divide by 512,                            */
/* followed by a divide by 10 using a 4 bit                             */
/* bi-quinary count sequence. (See LS90 data sheet                      */
/* for an example).                                                     */
/*                                                                      */
/* Bit 4 comes from the output of the divide by 1024                    */
/*       0, 1, 0, 1, 0, 1, 0, 1, 0, 1                                   */
/* Bit 3 comes from the QC output of the LS90 producing a sequence of   */
/*       0, 0, 1, 1, 0, 0, 1, 1, 1, 0                                   */
/* Bit 6 comes from the QD output of the LS90 producing a sequence of   */
/*       0, 0, 0, 0, 1, 0, 0, 0, 0, 1                                   */
/* Bit 7 comes from the QA output of the LS90 producing a sequence of   */
/*       0, 0, 0, 0, 0, 1, 1, 1, 1, 1                                   */

static const int frogger_timer[10] =
{
	0x00, 0x10, 0x08, 0x18, 0x40, 0x90, 0x88, 0x98, 0x88, 0xd0
};

READ8_DEVICE_HANDLER( frogger_portB_r )
{
	return frogger_timer[(device->machine->device<cpu_device>("audiocpu")->total_cycles()/512) % 10];
}

WRITE8_DEVICE_HANDLER( scramble_sh_irqtrigger_w )
{
	running_device *target = device->machine->device("konami_7474");

	/* the complement of bit 3 is connected to the flip-flop's clock */
	ttl7474_clock_w(target, (~data & 0x08) >> 3);

	/* bit 4 is sound disable */
	sound_global_enable(device->machine, (~data & 0x10) >> 4);
}

WRITE8_DEVICE_HANDLER( mrkougar_sh_irqtrigger_w )
{
	running_device *target = device->machine->device("konami_7474");

	/* the complement of bit 3 is connected to the flip-flop's clock */
	ttl7474_clock_w(target, (~data & 0x08) >> 3);
}

static IRQ_CALLBACK(scramble_sh_irq_callback)
{
	running_device *target = device->machine->device("konami_7474");

	/* interrupt acknowledge clears the flip-flop --
       we need to pulse the CLR line because MAME's core never clears this
       line, only asserts it */
	ttl7474_clear_w(target, 0);

	ttl7474_clear_w(target, 1);

	return 0xff;
}

WRITE_LINE_DEVICE_HANDLER( scramble_sh_7474_q_callback )
{
	/* the Q bar is connected to the Z80's INT line.  But since INT is complemented, */
	/* we need to complement Q bar */
	cputag_set_input_line(device->machine, "audiocpu", 0, !state ? ASSERT_LINE : CLEAR_LINE);
}

WRITE8_HANDLER( hotshock_sh_irqtrigger_w )
{
	cputag_set_input_line(space->machine, "audiocpu", 0, ASSERT_LINE);
}

READ8_DEVICE_HANDLER( hotshock_soundlatch_r )
{
	cputag_set_input_line(device->machine, "audiocpu", 0, CLEAR_LINE);
	return soundlatch_r(cputag_get_address_space(device->machine, "audiocpu", ADDRESS_SPACE_PROGRAM),0);
}

static void filter_w(running_device *device, int data)
{
	int C;


	C = 0;
	if (data & 1)
		C += 220000;	/* 220000pF = 0.220uF */
	if (data & 2)
		C +=  47000;	/*  47000pF = 0.047uF */
	if (device != NULL)
		filter_rc_set_RC(device,FLT_RC_LOWPASS,1000,5100,0,CAP_P(C));
}

WRITE8_HANDLER( scramble_filter_w )
{
	filter_w(space->machine->device("filter.1.0"), (offset >>  0) & 3);
	filter_w(space->machine->device("filter.1.1"), (offset >>  2) & 3);
	filter_w(space->machine->device("filter.1.2"), (offset >>  4) & 3);
	filter_w(space->machine->device("filter.0.0"), (offset >>  6) & 3);
	filter_w(space->machine->device("filter.0.1"), (offset >>  8) & 3);
	filter_w(space->machine->device("filter.0.2"), (offset >> 10) & 3);
}

WRITE8_HANDLER( frogger_filter_w )
{
	filter_w(space->machine->device("filter.0.0"), (offset >>  6) & 3);
	filter_w(space->machine->device("filter.0.1"), (offset >>  8) & 3);
	filter_w(space->machine->device("filter.0.2"), (offset >> 10) & 3);
}

void scramble_sh_init(running_machine *machine)
{
	cpu_set_irq_callback(machine->device("audiocpu"), scramble_sh_irq_callback);

	/* PR is always 0, D is always 1 */
	ttl7474_d_w(machine->device("konami_7474"), 1);
}


/***************************************************************************
    AD2083 TMS5110 implementation (still wrong!)

    ROMA: BIT1: Hypersoni ?
    ROMA: BIT2: Two thousand eighty three
    ROMA: BIT4: Atomic City Attack
    ROMA: BIT5: Thank you, please try again
    ROMA: BIT6: Two, one, fire
    ROMA: BIT7: Hyperjump
    ROMB: BIT1: Noise (Explosion ?)
    ROMB: BIT2: Welcome to the top 20
    ROMB: BIT4: Atomic City Attack
    ROMB: BIT5: Noise (Explosion ?)
    ROMB: BIT6: Keep going pressing
    ROMB: BIT7: You are the new champion

    The circuit consist of

    2x 2532 32Kbit roms
    2x 74LS393 quad 4bit counters to address roms
    1x 74LS174 hex-d-flipflops to latch control byte
    2x 74LS139 decoder to decode rom selects
    1x 74LS161 8bit input multiplexor to select sound bit for rom data read
    1x 74LS00  quad nand to decode signals (unknown) to latch control byte
               ==> 74LS139
    1x 74LS16  quad open collector inverters
    1x 74S288  32x8 Prom

    The prom obviously is used to provide the right timing when
    fetching data bits. This circuit should be comparable to bagman.

    Prom
    Q0      ==> NC
    Q1      ==> PDC
    Q2      ==> CTL2/CTL8 (Speak/Reset)
    Q6      ==> Reset Counters (LS393)
    Q7      ==> Trigger Logic

     only 16 bytes needed ... The original dump is bad. This
     is what is needed to get speech to work. The prom data has
     been updated and marked as BAD_DUMP. The information below
     is given for reference once another dump should surface.

     static const int prom[16] = {0x00, 0x00, 0x02, 0x00, 0x00, 0x02, 0x00, 0x00,
                  0x02, 0x00, 0x40, 0x00, 0x04, 0x06, 0x04, 0x84 };


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

/*
 *      Alt1 Alt2
 * 1 ==> C     B   Bit select
 * 2 ==> B     C   Bit select
 * 3 ==> A     A   Bit select
 * 4 ==> B1        Rom select
 * 5 ==> A1        Rom select
 *
 *      ALT1      ALT2
 * 321  CBA       CBA
 * 000  000       000
 * 001  100       010
 * 010  010       100
 * 011  110       110
 * 100  001       001
 * 101  101       011
 * 110  011       101
 * 111  111       111
 *
 * Alt1 provides more sensible sound. Both Alt1 and Alt2 are
 * possible on PCB so Alt2 is left in for documentation.
 *
 */

static WRITE8_DEVICE_HANDLER( ad2083_tms5110_ctrl_w )
{
	static const int tbl[8] = {0,4,2,6,1,5,3,7};

	tmsprom_bit_w(device, 0, tbl[data & 0x07]);
	switch (data>>3)
	{
		case 0x01:
			tmsprom_rom_csq_w(device, 1, 0);
			break;
		case 0x03:
			tmsprom_rom_csq_w(device, 0, 0);
			break;
		case 0x00:
			/* Rom 2 select */
			logerror("Rom 2 select\n");
			break;
		case 0x02:
			logerror("Rom 3 select .. \n");
			/* Rom 3 select */
			break;
	}
	/* most likely triggered by write access */
	tmsprom_enable_w(device, 0);
	tmsprom_enable_w(device, 1);
}


static const ay8910_interface ad2083_ay8910_interface_1 =
{
	AY8910_LEGACY_OUTPUT,
	AY8910_DEFAULT_LOADS,
	DEVCB_HANDLER(scramble_portB_r),
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL
};

static const ay8910_interface ad2083_ay8910_interface_2 =
{
	AY8910_LEGACY_OUTPUT,
	AY8910_DEFAULT_LOADS,
	DEVCB_HANDLER(hotshock_soundlatch_r),
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL
};

static ADDRESS_MAP_START( ad2083_sound_map, ADDRESS_SPACE_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x2fff) AM_ROM
	AM_RANGE(0x8000, 0x83ff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START( ad2083_sound_io_map, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x01, 0x01) AM_DEVWRITE("tmsprom", ad2083_tms5110_ctrl_w)
	AM_RANGE(0x10, 0x10) AM_DEVWRITE("ay1", ay8910_address_w)
	AM_RANGE(0x20, 0x20) AM_DEVREADWRITE("ay1", ay8910_r, ay8910_data_w)
	AM_RANGE(0x40, 0x40) AM_DEVREADWRITE("ay2", ay8910_r, ay8910_data_w)
	AM_RANGE(0x80, 0x80) AM_DEVWRITE("ay2", ay8910_address_w)
ADDRESS_MAP_END

static SOUND_START( ad2083 )
{
}

static const tmsprom_interface prom_intf =
{
	"5110ctrl",						/* prom memory region - sound region is automatically assigned */
	0x1000,							/* individual rom_size */
	1,								/* bit # of pdc line */
	/* virtual bit 8: constant 0, virtual bit 9:constant 1 */
	8,								/* bit # of ctl1 line */
	2,								/* bit # of ctl2 line */
	8,								/* bit # of ctl4 line */
	2,								/* bit # of ctl8 line */
	6,								/* bit # of rom reset */
	7,								/* bit # of stop */
	DEVCB_DEVICE_LINE("tms", tms5110_pdc_w),		/* tms pdc func */
	DEVCB_DEVICE_HANDLER("tms", tms5110_ctl_w)		/* tms ctl func */
};

static const tms5110_interface ad2083_tms5110_interface =
{
	/* legacy interface */
	NULL,											/* function to be called when chip requests another bit */
	NULL,											/* speech ROM load address callback */
	/* new rom controller interface */
	DEVCB_DEVICE_LINE("tmsprom", tmsprom_m0_w),		/* the M0 line */
	DEVCB_NULL,										/* the M1 line */
	DEVCB_NULL,										/* Write to ADD1,2,4,8 - 4 address bits */
	DEVCB_DEVICE_LINE("tmsprom", tmsprom_data_r),	/* Read one bit from ADD8/Data - voice data */
	DEVCB_NULL										/* rom clock - Only used to drive the data lines */
};



MACHINE_CONFIG_FRAGMENT( ad2083_audio )

	MCFG_CPU_ADD("audiocpu", Z80, 14318000/8)	/* 1.78975 MHz */
	MCFG_CPU_PROGRAM_MAP(ad2083_sound_map)
	MCFG_CPU_IO_MAP(ad2083_sound_io_map)

	MCFG_DEVICE_ADD("tmsprom", TMSPROM, AD2083_TMS5110_CLOCK / 2)  /* rom clock */
	MCFG_DEVICE_CONFIG(prom_intf)

	MCFG_SOUND_START(ad2083)

	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("ay1", AY8910, 14318000/8)
	MCFG_SOUND_CONFIG(ad2083_ay8910_interface_1)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)

	MCFG_SOUND_ADD("ay2", AY8910, 14318000/8)
	MCFG_SOUND_CONFIG(ad2083_ay8910_interface_2)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)

	MCFG_SOUND_ADD("tms", TMS5110A, AD2083_TMS5110_CLOCK)
	MCFG_SOUND_CONFIG(ad2083_tms5110_interface)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END