summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/tait8741.c
blob: fcb16982a77fe7b9a78fd6d2506192d08b0ddb71 (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
/*

Taito 8741 emulation

1.The pair chip for the PIO and serial communication between MAIN CPU and the sub CPU
2.The PIO for DIP SW and the controller reading.

*/

#include "driver.h"
#include "tait8741.h"

#define __log__ 0

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

gladiatr and Great Swordsman set.

  -comminucation main and sub cpu
  -dipswitch and key handling x 2chip

  Total 4chip

  It was supposed from the schematic of gladiator.
  Now, because dump is done, change the MCU code of gladiator to the CPU emulation.

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

#define CMD_IDLE 0
#define CMD_08 1
#define CMD_4a 2

typedef struct TAITO8741_status{
	UINT8 toData;    /* to host data      */
	UINT8 fromData;  /* from host data    */
	UINT8 fromCmd;   /* from host command */
	UINT8 status;    /* b0 = rd ready,b1 = wd full,b2 = cmd ?? */
	UINT8 mode;
	UINT8 phase;
	UINT8 txd[8];
	UINT8 rxd[8];
	UINT8 parallelselect;
	UINT8 txpoint;
	int connect;
	UINT8 pending4a;
	int serial_out;
	int coins;
	read8_handler portHandler;
}I8741;

static const struct TAITO8741interface *intf;
//static I8741 *taito8741;
static I8741 taito8741[MAX_TAITO8741];

/* for host data , write */
static void taito8741_hostdata_w(I8741 *st,int data)
{
	st->toData = data;
	st->status |= 0x01;
}

/* from host data , read */
static int taito8741_hostdata_r(I8741 *st)
{
	if( !(st->status & 0x02) ) return -1;
	st->status &= 0xfd;
	return st->fromData;
}

/* from host command , read */
static int taito8741_hostcmd_r(I8741 *st)
{
	if(!(st->status & 0x04)) return -1;
	st->status &= 0xfb;
	return st->fromCmd;
}


/* TAITO8741 I8741 emulation */

static void taito8741_serial_rx(I8741 *st,UINT8 *data)
{
	memcpy(st->rxd,data,8);
}

/* timer callback of serial tx finish */
static TIMER_CALLBACK( taito8741_serial_tx )
{
	int num = param;
	I8741 *st = &taito8741[num];
	I8741 *sst;

	if( st->mode==TAITO8741_MASTER)
		st->serial_out = 1;

	st->txpoint = 1;
	if(st->connect >= 0 )
	{
		sst = &taito8741[st->connect];
		/* transfer data */
		taito8741_serial_rx(sst,st->txd);
#if __log__
		logerror("8741-%d Serial data TX to %d\n",num,st->connect);
#endif
		if( sst->mode==TAITO8741_SLAVE)
			sst->serial_out = 1;
	}
}

void TAITO8741_reset(int num)
{
	I8741 *st = &taito8741[num];
	st->status = 0x00;
	st->phase = 0;
	st->parallelselect = 0;
	st->txpoint = 1;
	st->pending4a = 0;
	st->serial_out = 0;
	st->coins = 0;
	memset(st->rxd,0,8);
	memset(st->txd,0,8);
}

/* 8741 update */
static void taito8741_update(int num)
{
	I8741 *st,*sst;
	int next = num;
	int data;

	do{
		num = next;
		st = &taito8741[num];
		if( st->connect != -1 )
			 sst = &taito8741[st->connect];
		else sst = 0;
		next = -1;
		/* check pending command */
		switch(st->phase)
		{
		case CMD_08: /* serial data latch */
			if( st->serial_out)
			{
				st->status &= 0xfb; /* patch for gsword */
				st->phase = CMD_IDLE;
				next = num; /* continue this chip */
			}
			break;
		case CMD_4a: /* wait for syncronus ? */
			if(!st->pending4a)
			{
				taito8741_hostdata_w(st,0);
				st->phase = CMD_IDLE;
				next = num; /* continue this chip */
			}
			break;
		case CMD_IDLE:
			/* ----- data in port check ----- */
			data = taito8741_hostdata_r(st);
			if( data != -1 )
			{
				switch(st->mode)
				{
				case TAITO8741_MASTER:
				case TAITO8741_SLAVE:
					/* buffering transmit data */
					if( st->txpoint < 8 )
					{
//if (st->txpoint == 0 && num==1 && data&0x80) logerror("Coin Put\n");
						st->txd[st->txpoint++] = data;
					}
					break;
				case TAITO8741_PORT:
					if( data & 0xf8)
					{ /* ?? */
					}
					else
					{ /* port select */
						st->parallelselect = data & 0x07;
						taito8741_hostdata_w(st,st->portHandler ? st->portHandler(st->parallelselect) : 0);
					}
				}
			}
			/* ----- new command fetch ----- */
			data = taito8741_hostcmd_r(st);
			switch( data )
			{
			case -1: /* no command data */
				break;
			case 0x00: /* read from parallel port */
				taito8741_hostdata_w(st,st->portHandler ? st->portHandler(0) : 0 );
				break;
			case 0x01: /* read receive buffer 0 */
			case 0x02: /* read receive buffer 1 */
			case 0x03: /* read receive buffer 2 */
			case 0x04: /* read receive buffer 3 */
			case 0x05: /* read receive buffer 4 */
			case 0x06: /* read receive buffer 5 */
			case 0x07: /* read receive buffer 6 */
//if (data == 2 && num==0 && st->rxd[data-1]&0x80) logerror("Coin Get\n");
				taito8741_hostdata_w(st,st->rxd[data-1]);
				break;
			case 0x08:	/* latch received serial data */
				st->txd[0] = st->portHandler ? st->portHandler(0) : 0;
				if( sst )
				{
					timer_call_after_resynch(num,taito8741_serial_tx);
					st->serial_out = 0;
					st->status |= 0x04;
					st->phase = CMD_08;
				}
				break;
			case 0x0a:	/* 8741-0 : set serial comminucation mode 'MASTER' */
				//st->mode = TAITO8741_MASTER;
				break;
			case 0x0b:	/* 8741-1 : set serial comminucation mode 'SLAVE'  */
				//st->mode = TAITO8741_SLAVE;
				break;
			case 0x1f:  /* 8741-2,3 : ?? set parallelport mode ?? */
			case 0x3f:  /* 8741-2,3 : ?? set parallelport mode ?? */
			case 0xe1:  /* 8741-2,3 : ?? set parallelport mode ?? */
				st->mode = TAITO8741_PORT;
				st->parallelselect = 1; /* preset read number */
				break;
			case 0x62:  /* 8741-3   : ? */
				break;
			case 0x4a:	/* ?? syncronus with other cpu and return 00H */
				if( sst )
				{
					if(sst->pending4a)
					{
						sst->pending4a = 0; /* syncronus */
						taito8741_hostdata_w(st,0); /* return for host */
						next = st->connect;
					}
					else st->phase = CMD_4a;
				}
				break;
			case 0x80:	/* 8741-3 : return check code */
				taito8741_hostdata_w(st,0x66);
				break;
			case 0x81:	/* 8741-2 : return check code */
				taito8741_hostdata_w(st,0x48);
				break;
			case 0xf0:  /* GSWORD 8741-1 : initialize ?? */
				break;
			case 0x82:  /* GSWORD 8741-2 unknown */
				break;
			}
			break;
		}
	}while(next>=0);
}

int TAITO8741_start(const struct TAITO8741interface *taito8741intf)
{
	int i;

	intf = taito8741intf;

	//taito8741 = (I8741 *)malloc(intf->num*sizeof(I8741));
	//if( taito8741 == 0 ) return 1;

	for(i=0;i<intf->num;i++)
	{
		taito8741[i].connect     = intf->serial_connect[i];
		taito8741[i].portHandler = intf->portHandler_r[i];
		taito8741[i].mode        = intf->mode[i];
		TAITO8741_reset(i);
	}
	return 0;
}

/* read status port */
static int I8741_status_r(int num)
{
	I8741 *st = &taito8741[num];
	taito8741_update(num);
#if __log__
	logerror("8741-%d ST Read %02x PC=%04x\n",num,st->status,activecpu_get_pc());
#endif
	return st->status;
}

/* read data port */
static int I8741_data_r(int num)
{
	I8741 *st = &taito8741[num];
	int ret = st->toData;
	st->status &= 0xfe;
#if __log__
	logerror("8741-%d DATA Read %02x PC=%04x\n",num,ret,activecpu_get_pc());
#endif
	/* update chip */
	taito8741_update(num);

	switch( st->mode )
	{
	case TAITO8741_PORT: /* parallel data */
		taito8741_hostdata_w(st,st->portHandler ? st->portHandler(st->parallelselect) : 0);
		break;
	}
	return ret;
}

/* Write data port */
static void I8741_data_w(int num, int data)
{
	I8741 *st = &taito8741[num];
#if __log__
	logerror("8741-%d DATA Write %02x PC=%04x\n",num,data,activecpu_get_pc());
#endif
	st->fromData = data;
	st->status |= 0x02;
	/* update chip */
	taito8741_update(num);
}

/* Write command port */
static void I8741_command_w(int num, int data)
{
	I8741 *st = &taito8741[num];
#if __log__
	logerror("8741-%d CMD Write %02x PC=%04x\n",num,data,activecpu_get_pc());
#endif
	st->fromCmd = data;
	st->status |= 0x04;
	/* update chip */
	taito8741_update(num);
}

/* Write port handler */
WRITE8_HANDLER( TAITO8741_0_w )
{
	if(offset&1) I8741_command_w(0,data);
	else         I8741_data_w(0,data);
}
WRITE8_HANDLER( TAITO8741_1_w )
{
	if(offset&1) I8741_command_w(1,data);
	else         I8741_data_w(1,data);
}
WRITE8_HANDLER( TAITO8741_2_w )
{
	if(offset&1) I8741_command_w(2,data);
	else         I8741_data_w(2,data);
}
WRITE8_HANDLER( TAITO8741_3_w )
{
	if(offset&1) I8741_command_w(3,data);
	else         I8741_data_w(3,data);
}

/* Read port handler */
READ8_HANDLER( TAITO8741_0_r )
{
	if(offset&1) return I8741_status_r(0);
	return I8741_data_r(0);
}
READ8_HANDLER( TAITO8741_1_r )
{
	if(offset&1) return I8741_status_r(1);
	return I8741_data_r(1);
}
READ8_HANDLER( TAITO8741_2_r )
{
	if(offset&1) return I8741_status_r(2);
	return I8741_data_r(2);
}
READ8_HANDLER( TAITO8741_3_r )
{
	if(offset&1) return I8741_status_r(3);
	return I8741_data_r(3);
}
/****************************************************************************

joshi Vollyball set.

  Only the chip of the communication between MAIN and the SUB.
  For the I/O, there may be I8741 of the addition.

  MCU code is not dumped.
  There is some HACK operation because the emulation is imperfect.

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

int josvolly_nmi_enable;

typedef struct josvolly_8741_struct {
	UINT8 cmd;
	UINT8 sts;
	UINT8 txd;
	UINT8 outport;
	UINT8 rxd;
	UINT8 connect;

	UINT8 rst;

	read8_handler initReadPort;
}JV8741;

static JV8741 i8741[4];

void josvolly_8741_reset(void)
{
	int i;

	josvolly_nmi_enable = 0;

	for(i=0;i<4;i++)
	{
		i8741[i].cmd = 0;
		i8741[i].sts = 0; // 0xf0; /* init flag */
		i8741[i].txd = 0;
		i8741[i].outport = 0xff;
		i8741[i].rxd = 0;

		i8741[i].rst = 1;

	}
	i8741[0].connect = 1;
	i8741[1].connect = 0;

	i8741[0].initReadPort = input_port_3_r;  /* DSW1 */
	i8741[1].initReadPort = input_port_4_r;  /* DSW2 */
	i8741[2].initReadPort = input_port_3_r;  /* DUMMY */
	i8741[3].initReadPort = input_port_4_r;  /* DUMMY */
}

/* transmit data finish callback */
static TIMER_CALLBACK( josvolly_8741_tx )
{
	int num = param;
	JV8741 *src = &i8741[num];
	JV8741 *dst = &i8741[src->connect];

	dst->rxd = src->txd;

	src->sts &= ~0x02; /* TX full ? */
	dst->sts |=  0x01; /* RX ready  ? */
}

static void josvolly_8741_do(int num)
{
	if( (i8741[num].sts & 0x02) )
	{
		/* transmit data */
		timer_set (ATTOTIME_IN_USEC(1),num,josvolly_8741_tx);
	}
}

static void josvolly_8741_w(int num,int offset,int data,int log)
{
	JV8741 *mcu = &i8741[num];

	if(offset==1)
	{
#if __log__
if(log)
		logerror("PC=%04X 8741[%d] CW %02X\n",activecpu_get_pc(),num,data);
#endif

		/* read pointer */
		mcu->cmd = data;
		/* CMD */
		switch(data)
		{
		case 0:
			mcu->txd = data ^ 0x40;
			mcu->sts |= 0x02;
			break;
		case 1:
			mcu->txd = data ^ 0x40;
			mcu->sts |= 0x02;
#if 1
			/* ?? */
			mcu->rxd = 0;  /* SBSTS ( DIAG ) , killed */
			mcu->sts |= 0x01; /* RD ready */
#endif
			break;
		case 2:
#if 1
			mcu->rxd = input_port_4_r(0);  /* DSW2 */
			mcu->sts |= 0x01; /* RD ready */
#endif
			break;
		case 3: /* normal mode ? */
			break;

		case 0xf0: /* clear main sts ? */
			mcu->txd = data ^ 0x40;
			mcu->sts |= 0x02;
			break;
		}
	}
	else
	{
		/* data */
#if __log__
if(log)
		logerror("PC=%04X 8741[%d] DW %02X\n",activecpu_get_pc(),num,data);
#endif

		mcu->txd  = data^0x40; /* parity reverce ? */
		mcu->sts  |= 0x02;     /* TXD busy         */
#if 1
		/* interrupt ? */
		if(num==0)
		{
			if(josvolly_nmi_enable)
			{
				cpunum_set_input_line(1, INPUT_LINE_NMI, PULSE_LINE);
				josvolly_nmi_enable = 0;
			}
		}
#endif
	}
	josvolly_8741_do(num);
}

static INT8 josvolly_8741_r(int num,int offset,int log)
{
	JV8741 *mcu = &i8741[num];
	int ret;

	if(offset==1)
	{
		if(mcu->rst)
			mcu->rxd = (mcu->initReadPort)(0); /* port in */
		ret = mcu->sts;
#if __log__
if(log)
		logerror("PC=%04X 8741[%d]       SR %02X\n",activecpu_get_pc(),num,ret);
#endif
	}
	else
	{
		/* clear status port */
		mcu->sts &= ~0x01; /* RD ready */
		ret = mcu->rxd;
#if __log__
if(log)
		logerror("PC=%04X 8741[%d]       DR %02X\n",activecpu_get_pc(),num,ret);
#endif
		mcu->rst = 0;
	}
	return ret;
}

WRITE8_HANDLER( josvolly_8741_0_w ){ josvolly_8741_w(0,offset,data,1); }
READ8_HANDLER( josvolly_8741_0_r ) { return josvolly_8741_r(0,offset,1); }
WRITE8_HANDLER( josvolly_8741_1_w ) { josvolly_8741_w(1,offset,data,1); }
READ8_HANDLER( josvolly_8741_1_r ) { return josvolly_8741_r(1,offset,1); }