summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/pgmprot.c
blob: 96963ccbfcab365b89f8a0cbd4e531cced166de4 (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
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
#include "driver.h"
#include "includes/pgm.h"



/*** ASIC27a (Puzzle Star) -- ARM but with no external rom? behaves a bit like KOV ***/


/*** (pstarS) ***/

static const int pstar_ba[0x1E]={
	0x02,0x00,0x00,0x01,0x00,0x03,0x00,0x00, //0
	0x02,0x00,0x06,0x00,0x22,0x04,0x00,0x03, //8
	0x00,0x00,0x06,0x00,0x20,0x07,0x00,0x03, //10
	0x00,0x21,0x01,0x00,0x00,0x63
};

static const int pstar_b0[0x10]={
	0x09,0x0A,0x0B,0x00,0x01,0x02,0x03,0x04,
	0x05,0x06,0x07,0x08,0x00,0x00,0x00,0x00
};

static const int pstar_ae[0x10]={
	0x5D,0x86,0x8C ,0x8B,0xE0,0x8B,0x62,0xAF,
	0xB6,0xAF,0x10A,0xAF,0x00,0x00,0x00,0x00
};

static const int pstar_a0[0x10]={
	0x02,0x03,0x04,0x05,0x06,0x01,0x0A,0x0B,
	0x0C,0x0D,0x0E,0x09,0x00,0x00,0x00,0x00,
};

static const int pstar_9d[0x10]={
	0x05,0x03,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

static const int pstar_90[0x10]={
	0x0C,0x10,0x0E,0x0C,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
static const int pstar_8c[0x23]={
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,
	0x01,0x01,0x01,0x01,0x02,0x02,0x02,0x02,
	0x02,0x02,0x03,0x03,0x03,0x04,0x04,0x04,
	0x03,0x03,0x03
};

static const int pstar_80[0x1a3]={
	0x03,0x03,0x04,0x04,0x04,0x04,0x05,0x05,
	0x05,0x05,0x06,0x06,0x03,0x03,0x04,0x04,
	0x05,0x05,0x05,0x05,0x06,0x06,0x07,0x07,
	0x03,0x03,0x04,0x04,0x05,0x05,0x05,0x05,
	0x06,0x06,0x07,0x07,0x06,0x06,0x06,0x06,
	0x06,0x06,0x06,0x07,0x07,0x07,0x07,0x07,
	0x06,0x06,0x06,0x06,0x06,0x06,0x07,0x07,
	0x07,0x07,0x08,0x08,0x05,0x05,0x05,0x05,
	0x05,0x05,0x05,0x06,0x06,0x06,0x07,0x07,
	0x06,0x06,0x06,0x07,0x07,0x07,0x08,0x08,
	0x09,0x09,0x09,0x09,0x07,0x07,0x07,0x07,
	0x07,0x08,0x08,0x08,0x08,0x09,0x09,0x09,
	0x06,0x06,0x07,0x07,0x07,0x08,0x08,0x08,
	0x08,0x08,0x09,0x09,0x05,0x05,0x06,0x06,
	0x06,0x07,0x07,0x08,0x08,0x08,0x08,0x09,
	0x07,0x07,0x07,0x07,0x07,0x08,0x08,0x08,
	0x08,0x09,0x09,0x09,0x06,0x06,0x07,0x03,
	0x07,0x06,0x07,0x07,0x08,0x07,0x05,0x04,
	0x03,0x03,0x04,0x04,0x05,0x05,0x06,0x06,
	0x06,0x06,0x06,0x06,0x03,0x04,0x04,0x04,
	0x04,0x05,0x05,0x06,0x06,0x06,0x06,0x07,
	0x04,0x04,0x05,0x05,0x06,0x06,0x06,0x06,
	0x06,0x07,0x07,0x08,0x05,0x05,0x06,0x07,
	0x07,0x08,0x08,0x08,0x08,0x08,0x08,0x08,
	0x05,0x05,0x05,0x07,0x07,0x07,0x07,0x07,
	0x07,0x08,0x08,0x08,0x08,0x08,0x09,0x09,
	0x09,0x09,0x03,0x04,0x04,0x05,0x05,0x05,
	0x06,0x06,0x07,0x07,0x07,0x07,0x08,0x08,
	0x08,0x09,0x09,0x09,0x03,0x04,0x05,0x05,
	0x04,0x03,0x04,0x04,0x04,0x05,0x05,0x04,
	0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,
	0x03,0x03,0x03,0x04,0x04,0x04,0x04,0x04,
	0x04,0x04,0x04,0x04,0x04,0x03,0x03,0x03,
	0x03,0x03,0x03,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,
	0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00
};




READ16_HANDLER( pstars_protram_r )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;

	if (offset == 4)		//region
		return input_port_read(space->machine, "Region");
	else if (offset >= 0x10)  //timer
	{
		logerror("PSTARS ACCESS COUNTER %6X\n", state->pstar_ram[offset - 0x10]);
		return state->pstar_ram[offset - 0x10]--;
	}
	return 0x0000;
}

READ16_HANDLER( pstars_r )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;

	if (offset == 0)
	{
		UINT16 d = state->pstars_val & 0xffff;
		UINT16 realkey = state->pstars_key >> 8;
		realkey |= state->pstars_key;
		d ^= realkey;
//      logerror("PSTARS A27 R  %6X\n", state->pstars_val);
		return d;
	}
	else if (offset == 1)
	{
		UINT16 d = state->pstars_val >> 16;
		UINT16 realkey = state->pstars_key >> 8;
		realkey |= state->pstars_key;
		d ^= realkey;
		return d;

	}
	return 0xff;
}

WRITE16_HANDLER( pstars_w )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;

	if (offset == 0)
	{
		state->pstars_int[0] = data;
		return;
	}

	if (offset == 1)
	{
		UINT16 realkey;
		if ((data >> 8) == 0xff)
			state->pstars_key = 0xff00;
		realkey = state->pstars_key >> 8;
		realkey |= state->pstars_key;
		{
			state->pstars_key += 0x100;
			state->pstars_key &= 0xff00;
			if (state->pstars_key == 0xff00)
				state->pstars_key = 0x100;
		}
		data ^= realkey;
		state->pstars_int[1] = data;
		state->pstars_int[0] ^= realkey;

		switch (state->pstars_int[1] & 0xff)
		{
		case 0x99:
			state->pstars_key = 0x100;
			state->pstars_val = 0x880000;
			break;

		case 0xe0:
			state->pstars_val = 0xa00000 + (state->pstars_int[0] << 6);
			break;

		case 0xdc:
			state->pstars_val = 0xa00800 + (state->pstars_int[0] << 6);
			break;

		case 0xd0:
			state->pstars_val = 0xa01000 + (state->pstars_int[0] << 5);
			break;

		case 0xb1:
			state->pstar_b1 = state->pstars_int[0];
			state->pstars_val = 0x890000;
			break;

		case 0xbf:
			state->pstars_val = state->pstar_b1 * state->pstars_int[0];
			break;

		case 0xc1: //TODO:TIMER  0,1,2,FIX TO 0 should be OK?
			state->pstars_val = 0;
			break;

		case 0xce: //TODO:TIMER  0,1,2
			state->pstar_ce = state->pstars_int[0];
			state->pstars_val=0x890000;
			break;

		case 0xcf: //TODO:TIMER  0,1,2
			state->pstar_ram[state->pstar_ce] = state->pstars_int[0];
			state->pstars_val = 0x890000;
			break;

		case 0xe7:
			state->pstar_e7 = (state->pstars_int[0] >> 12) & 0xf;
			state->pstars_regs[state->pstar_e7] &= 0xffff;
			state->pstars_regs[state->pstar_e7] |= (state->pstars_int[0] & 0xff) << 16;
			state->pstars_val = 0x890000;
			break;

		case 0xe5:
			state->pstars_regs[state->pstar_e7] &= 0xff0000;
			state->pstars_regs[state->pstar_e7] |= state->pstars_int[0];
			state->pstars_val = 0x890000;
			break;

		case 0xf8: //@73C
			state->pstars_val = state->pstars_regs[state->pstars_int[0] & 0xf] & 0xffffff;
			break;

		case 0xba:
			state->pstars_val = pstar_ba[state->pstars_int[0]];
			break;

		case 0xb0:
			state->pstars_val = pstar_b0[state->pstars_int[0]];
			break;

		case 0xae:
			state->pstars_val = pstar_ae[state->pstars_int[0]];
			break;

		case 0xa0:
			state->pstars_val = pstar_a0[state->pstars_int[0]];
   			break;

		case 0x9d:
			state->pstars_val = pstar_9d[state->pstars_int[0]];
			break;

		case 0x90:
			state->pstars_val = pstar_90[state->pstars_int[0]];
			break;

		case 0x8c:
			state->pstars_val = pstar_8c[state->pstars_int[0]];
			break;

		case 0x80:
	   		state->pstars_val = pstar_80[state->pstars_int[0]];
			break;

		default:
			state->pstars_val = 0x890000;
			logerror("PSTARS PC(%06x) UNKNOWN %4X %4X\n", cpu_get_pc(space->cpu), state->pstars_int[1], state->pstars_int[0]);

		}

	}
}

/*** ASIC 3 (oriental legends protection) ****************************************/

static void asic3_compute_hold(running_machine *machine)
{
	pgm_state *state = (pgm_state *)machine->driver_data;

	// The mode is dependent on the region
	static const int modes[4] = { 1, 1, 3, 2 };
	int mode = modes[input_port_read(machine, "Region") & 3];

	switch (mode)
	{
	case 1:
		state->asic3_hold =
			(state->asic3_hold << 1)
			 ^ 0x2bad
			 ^ BIT(state->asic3_hold, 15) ^ BIT(state->asic3_hold, 10) ^ BIT(state->asic3_hold, 8) ^ BIT(state->asic3_hold, 5)
			 ^ BIT(state->asic3_z, state->asic3_y)
			 ^ (BIT(state->asic3_x, 0) << 1) ^ (BIT(state->asic3_x, 1) << 6) ^ (BIT(state->asic3_x, 2) << 10) ^ (BIT(state->asic3_x, 3) << 14);
		break;
	case 2:
		state->asic3_hold =
			(state->asic3_hold << 1)
			 ^ 0x2bad
			 ^ BIT(state->asic3_hold, 15) ^ BIT(state->asic3_hold, 7) ^ BIT(state->asic3_hold, 6) ^ BIT(state->asic3_hold, 5)
			 ^ BIT(state->asic3_z, state->asic3_y)
			 ^ (BIT(state->asic3_x, 0) << 4) ^ (BIT(state->asic3_x, 1) << 6) ^ (BIT(state->asic3_x, 2) << 10) ^ (BIT(state->asic3_x, 3) << 12);
		break;
	case 3:
		state->asic3_hold =
			(state->asic3_hold << 1)
			 ^ 0x2bad
			 ^ BIT(state->asic3_hold, 15) ^ BIT(state->asic3_hold, 10) ^ BIT(state->asic3_hold, 8) ^ BIT(state->asic3_hold, 5)
			 ^ BIT(state->asic3_z, state->asic3_y)
			 ^ (BIT(state->asic3_x, 0) << 4) ^ (BIT(state->asic3_x, 1) << 6) ^ (BIT(state->asic3_x, 2) << 10) ^ (BIT(state->asic3_x, 3) << 12);
		break;
	}
}

READ16_HANDLER( pgm_asic3_r )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;
	UINT8 res = 0;
	/* region is supplied by the protection device */

	switch (state->asic3_reg)
	{
	case 0x00: res = (state->asic3_latch[0] & 0xf7) | ((input_port_read(space->machine, "Region") << 3) & 0x08); break;
	case 0x01: res = state->asic3_latch[1]; break;
	case 0x02: res = (state->asic3_latch[2] & 0x7f) | ((input_port_read(space->machine, "Region") << 6) & 0x80); break;
	case 0x03:
		res = (BIT(state->asic3_hold, 15) << 0)
			| (BIT(state->asic3_hold, 12) << 1)
			| (BIT(state->asic3_hold, 13) << 2)
			| (BIT(state->asic3_hold, 10) << 3)
			| (BIT(state->asic3_hold, 7) << 4)
			| (BIT(state->asic3_hold, 9) << 5)
			| (BIT(state->asic3_hold, 2) << 6)
			| (BIT(state->asic3_hold, 5) << 7);
		break;
	case 0x20: res = 0x49; break;
	case 0x21: res = 0x47; break;
	case 0x22: res = 0x53; break;
	case 0x24: res = 0x41; break;
	case 0x25: res = 0x41; break;
	case 0x26: res = 0x7f; break;
	case 0x27: res = 0x41; break;
	case 0x28: res = 0x41; break;
	case 0x2a: res = 0x3e; break;
	case 0x2b: res = 0x41; break;
	case 0x2c: res = 0x49; break;
	case 0x2d: res = 0xf9; break;
	case 0x2e: res = 0x0a; break;
	case 0x30: res = 0x26; break;
	case 0x31: res = 0x49; break;
	case 0x32: res = 0x49; break;
	case 0x33: res = 0x49; break;
	case 0x34: res = 0x32; break;
	}

	return res;
}

WRITE16_HANDLER( pgm_asic3_w )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;

	if(ACCESSING_BITS_0_7)
	{
		if (state->asic3_reg < 3)
			state->asic3_latch[state->asic3_reg] = data << 1;
		else if (state->asic3_reg == 0xa0)
			state->asic3_hold = 0;
		else if (state->asic3_reg == 0x40)
		{
			state->asic3_h2 = state->asic3_h1;
			state->asic3_h1 = data;
		}
		else if (state->asic3_reg == 0x48)
		{
			state->asic3_x = 0;
			if (!(state->asic3_h2 & 0x0a))
				state->asic3_x |= 8;
			if (!(state->asic3_h2 & 0x90))
				state->asic3_x |= 4;
			if (!(state->asic3_h1 & 0x06))
				state->asic3_x |= 2;
			if (!(state->asic3_h1 & 0x90))
				state->asic3_x |= 1;
		}
		else if(state->asic3_reg >= 0x80 && state->asic3_reg <= 0x87)
		{
			state->asic3_y = state->asic3_reg & 7;
			state->asic3_z = data;
			asic3_compute_hold(space->machine);
		}
	}
}

WRITE16_HANDLER( pgm_asic3_reg_w )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;

	if(ACCESSING_BITS_0_7)
		state->asic3_reg = data & 0xff;
}

/*** Knights of Valour / Sango / PhotoY2k Protection (from ElSemi) (ASIC28) ***/

static const UINT32 B0TABLE[16] = {2, 0, 1, 4, 3}; //maps char portraits to tables

// photo2yk bonus stage
static const UINT32 AETABLE[16]={0x00,0x0a,0x14,
		0x01,0x0b,0x15,
		0x02,0x0c,0x16};

//Not sure if BATABLE is complete
static const UINT32 BATABLE[0x40]=
	{0x00,0x29,0x2c,0x35,0x3a,0x41,0x4a,0x4e,  //0x00
     0x57,0x5e,0x77,0x79,0x7a,0x7b,0x7c,0x7d, //0x08
     0x7e,0x7f,0x80,0x81,0x82,0x85,0x86,0x87, //0x10
     0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x90,  //0x18
     0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,
     0x9e,0xa3,0xd4,0xa9,0xaf,0xb5,0xbb,0xc1};



READ16_HANDLER( sango_protram_r )
{
	// at offset == 4 is region (supplied by device)
	// 0 = china
	// 1 = taiwan
	// 2 = japan
	// 3 = korea
	// 4 = hong kong
	// 5 = world

	if (offset == 4)
		return input_port_read(space->machine, "Region");

	// otherwise it doesn't seem to use the ram for anything important, we return 0 to avoid test mode corruption
	// kovplus reads from offset 000e a lot ... why?
#ifdef MAME_DEBUG
	popmessage ("protection ram r %04x",offset);
#endif
	return 0x0000;
}

#define BITSWAP10(val,B9,B8,B7,B6,B5,B4,B3,B2,B1,B0) \
                ((BIT(val, B9) <<  9) | \
                 (BIT(val, B8) <<  8) | \
                 (BIT(val, B7) <<  7) | \
                 (BIT(val, B6) <<  6) | \
                 (BIT(val, B5) <<  5) | \
                 (BIT(val, B4) <<  4) | \
                 (BIT(val, B3) <<  3) | \
                 (BIT(val, B2) <<  2) | \
                 (BIT(val, B1) <<  1) | \
                 (BIT(val, B0) <<  0))


READ16_HANDLER( asic28_r )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;
	UINT32 val = (state->asic28_regs[1] << 16) | (state->asic28_regs[0]);

	//logerror("Asic28 Read PC = %06x Command = %02x ??\n", cpu_get_pc(space->cpu), state->asic28_regs[1]);

	switch (state->asic28_regs[1] & 0xff)
	{
		case 0x99:
			val = 0x880000;
			break;

		case 0x9d:	// spr palette
			val = 0xa00000 + ((state->asic28_regs[0] & 0x1f) << 6);
			break;

		case 0xb0:
			val = B0TABLE[state->asic28_regs[0] & 0xf];
			break;

		case 0xb4:
			{
				//UINT16 tmp = state->eoregs[v2];
				int v2 = state->asic28_regs[0] & 0x0f;
				int v1 = (state->asic28_regs[0] & 0x0f00) >> 8;
				//state->eoregs[v2] = state->eoregs[v1];
				//state->eoregs[v1] = tmp;
				if (state->asic28_regs[0] == 0x102)
					state->eoregs[1] = state->eoregs[0];
				else
					state->eoregs[v1] = state->eoregs[v2];

				val = 0x880000;
			}
			break;

		case 0xba:
			val = BATABLE[state->asic28_regs[0] & 0x3f];
			if (state->asic28_regs[0] > 0x2f)
				popmessage("Unmapped BA com %02x, contact ElSemi / MameDev", state->asic28_regs[0]);
			break;

		case 0xc0:
			val = 0x880000;
			break;

		case 0xc3:	//TXT tile position Uses C0 to select column
			val = 0x904000 + (state->asic_params[0xc0] + state->asic_params[0xc3] * 64) * 4;
			break;

		case 0xcb:
			val = 0x880000;
			break;

		case 0xcc: //BG
   			{
   	 		int y = state->asic_params[0xcc];
			if (y & 0x400)    //y is signed (probably x too and it also applies to TXT, but I've never seen it used)
				y =- (0x400 - (y & 0x3ff));
			val = 0x900000 + (((state->asic_params[0xcb] + (y) * 64) * 4) /*&0x1fff*/);
   			}
   			break;

		case 0xd0:	//txt palette
			val = 0xa01000 + (state->asic28_regs[0] << 5);
			break;

		case 0xd6:	//???? check it
			{
				int v2 = state->asic28_regs[0] & 0xf;
				//int v1 = (state->asic28_regs[0] & 0xf0) >> 4;
				state->eoregs[0] = state->eoregs[v2];
				//state->eoregs[v2] = 0;
				val = 0x880000;
			}
			break;

		case 0xdc:	//bg palette
			val = 0xa00800 + (state->asic28_regs[0] << 6);
			break;

		case 0xe0:	//spr palette
			val = 0xa00000 + ((state->asic28_regs[0] & 0x1f) << 6);
			break;

		case 0xe5:
			val = 0x880000;
			break;

		case 0xe7:
			val = 0x880000;
			break;

		case 0xf0:
			val = 0x00C000;
			break;

		case 0xf8:
			val = state->eoregs[state->asic28_regs[0] & 0xf] & 0xffffff;
			break;

		case 0xfc:	//Adjust damage level to char experience level
			{
			val = (state->asic_params[0xfc] * state->asic_params[0xfe]) >> 6;
			break;
			}

		case 0xfe:	//todo
			val = 0x880000;
			break;


		default:
			val = 0x880000;
	}

	if(offset == 0)
	{
		UINT16 d = val & 0xffff;
		UINT16 realkey = state->asic28_key >> 8;
		realkey |= state->asic28_key;
		d ^= realkey;
		return d;
	}
	else if (offset == 1)
	{
		UINT16 d = val >> 16;
		UINT16 realkey = state->asic28_key >> 8;
		realkey |= state->asic28_key;
		d ^= realkey;
		state->asic28_rcnt++;
		if (!(state->asic28_rcnt & 0xf))
		{
			state->asic28_key += 0x100;
			state->asic28_key &= 0xff00;
		}
		return d;
	}
	return 0xff;
}

WRITE16_HANDLER( asic28_w )
{
	pgm_state *state = (pgm_state *)space->machine->driver_data;

	if (offset == 0)
	{
		UINT16 realkey =state->asic28_key >> 8;
		realkey |= state->asic28_key;
		data ^= realkey;
		state->asic28_regs[0] = data;
		return;
	}
	if (offset == 1)
	{
		UINT16 realkey;

		state->asic28_key = data & 0xff00;

		realkey = state->asic28_key >> 8;
		realkey |= state->asic28_key;
		data ^= realkey;
		state->asic28_regs[1] = data;
		logerror("ASIC28 CMD %04x  PARAM %04x\n", state->asic28_regs[1], state->asic28_regs[0]);

		state->asic_params[state->asic28_regs[1] & 0xff] = state->asic28_regs[0];
		if (state->asic28_regs[1] == 0xE7)
		{
			UINT32 E0R = (state->asic_params[0xe7] >> 12) & 0xf;
			state->eoregs[E0R] &= 0xffff;
			state->eoregs[E0R] |= state->asic28_regs[0] << 16;
		}
		if (state->asic28_regs[1]==0xE5)
		{
			UINT32 E0R = (state->asic_params[0xe7] >> 12) & 0xf;
			state->eoregs[E0R] &= 0xff0000;
			state->eoregs[E0R] |= state->asic28_regs[0];
		}
		state->asic28_rcnt = 0;
	}
}

/* Dragon World 2 */

#define DW2BITSWAP(s,d,bs,bd)  d=((d&(~(1<<bd)))|(((s>>bs)&1)<<bd))
//Use this handler for reading from 0xd80000-0xd80002
READ16_HANDLER( dw2_d80000_r )
{
// addr&=0xff;
// if(dw2reg<0x20) //NOT SURE!!
	{
		//The value at 0x80EECE is computed in the routine at 0x107c18
		UINT16 d = pgm_mainram[0xEECE/2];
		UINT16 d2 = 0;
		d = (d >> 8) | (d << 8);
		DW2BITSWAP(d, d2, 7,  0);
		DW2BITSWAP(d, d2, 4,  1);
		DW2BITSWAP(d, d2, 5,  2);
		DW2BITSWAP(d, d2, 2,  3);
		DW2BITSWAP(d, d2, 15, 4);
		DW2BITSWAP(d, d2, 1,  5);
		DW2BITSWAP(d, d2, 10, 6);
		DW2BITSWAP(d, d2, 13, 7);
		// ... missing bitswaps here (8-15) there is not enough data to know them
		// the code only checks the lowest 8 bytes
		return d2;
	}
}

/* Dragon World 3

Dragon World 3 has 2 protection chips
ASIC022 and ASIC025
one of them also has an external data rom (encrypted?)

code below is ElSemi's preliminary code, it doesn't work properly and isn't used, much of the protection isn't understood */

#if 0
AddWriteArea(0xda0000,0xdaffff,0,dw3_w8,dw3_w16,dw3_w32);
AddReadArea (0xda0000,0xdaffff,0,dw3_r8,dw3_r16,dw3_r32);

#define DW3BITSWAP(s,d,bs,bd)  d=((d&(~(1<<bd)))|(((s>>bs)&1)<<bd))

UINT16 dw3_Rw[8];
UINT8 *dw3_R=(UINT8 *) dw3_Rw;

UINT8 dw3_r8(UINT32 addr)
{
	if(addr>=0xDA5610 && addr<=0xDA5613)
		return *((UINT8 *) (dw3_R+((addr-0xDA5610)^1)));
	return 0;
}

UINT16 dw3_r16(UINT32 addr)
{
	if(addr>=0xDA5610 && addr<=0xDA5613)
		return *((UINT16 *) (dw3_R+(addr-0xDA5610)));
	return 0;
}

UINT32 dw3_r32(UINT32 addr)
{
	return 0;
}

void dw3_w8(UINT32 addr,UINT8 val)
{
	if(addr==0xDA5610)
		dw3_R[1]=val;
	if(addr==0xDA5611)
		dw3_R[0]=val;
	if(addr==0xDA5612)
		dw3_R[3]=val;
	if(addr==0xDA5613)
		dw3_R[2]=val;
}

void dw3_w16(UINT32 addr,UINT16 val)
{
	if(addr>=0xDA5610 && addr<=0xDA5613)
	{
		UINT16 *s=((UINT16 *) (dw3_R+(addr-0xDA5610)));
		*s=val;
		if(addr==0xDA5610)
		{
			if(val==1)
			{
				UINT16 v1=dw3_Rw[1];
				UINT16 v2=0;
				DW3BITSWAP(v1,v2,0,0);
				DW3BITSWAP(v1,v2,1,1);
				DW3BITSWAP(v1,v2,7,2);
				DW3BITSWAP(v1,v2,6,3);
				DW3BITSWAP(v1,v2,5,4);
				DW3BITSWAP(v1,v2,4,5);
				DW3BITSWAP(v1,v2,3,6);
				DW3BITSWAP(v1,v2,2,7);

				dw3_Rw[1]=v2;
			}
		}
	}

}


void dw3_w32(UINT32 addr,UINT32 val)
{

}
#endif