summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/pcxt.c
blob: 8be5629b84d61cffe3bfe52985fad692d4af7e23 (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
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
/******************************************************************************************

PC-XT (c) 1987 IBM

(Actually Arcade games running on more or less modified PC-XT HW)

driver by Angelo Salese & Chris Hardy
original tetriunk.c by David Haywood & Tomasz Slanina

Notes:
- The Korean Tetris is a blantant rip-off of the Mirrorsoft/Andromeda Software Tetris PC
  version;

TODO:
- 02851: tetriskr: Corrupt game graphics after some time of gameplay, caused by a wrong
  reading of the i/o $3c8 bit 1.
- Add a proper FDC device.
- Filetto: Add UM5100 sound chip ,might be connected to the prototyping card;
- buzzer sound has issues in both games

********************************************************************************************
Filetto HW notes:
The PCB is a un-modified IBM-PC with a CGA adapter & a prototyping card that controls the
interface between the pc and the Jamma connectors.Additionally there's also a UM5100 sound
chip for the sound.
PCB Part Number: S/N 90289764 NOVARXT
PCB Contents:
1x UMC 8923S-UM5100 voice processor (upper board)
1x MMI PAL16L8ACN-940CRK9 (upper board)
1x AMD AMPAL16R8APC-8804DM (upper board)
1x AMD P8088-1 main processor 8.000MHz (lower board)
1x Proton PT8010AF PLCC 28.636MHz (lower board)
1x UMC 8928LP-UM8272A floppy disk controller (lower board)
1x UMC 8935CS-UM82C11 Printer Adapter Interface (lower board)
1x UMC 8936CS-UM8250B Programmable asynchronous communications element (lower board)
There isn't any keyboard found connected to the pcb.
********************************************************************************************
Filetto SW notes:
The software of this game can be extracted with a normal Windows program extractor.
The files names are:
-command.com  (1)
-ibmbio.com   (1)
-ibmdos.com   (1)
-ansi.sys     (1)
-config.sys   (2)
-autoexec.bat (3)
-x.exe        (4)
(1)This is an old Italian version of MS-DOS (v3.30 18th March 1987).
(2)Contains "device=ansi.sys",it's an hook-up for the graphics used by the BIOS.
(3)It has an Echo off (as you can notice from the game itself) and then the loading of the
main program (x.exe).
(4)The main program,done in plain Basic with several Italian comments in it.The date of
the main program is 9th October 1990.

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

#include "emu.h"
#include "cpu/i86/i86.h"
#include "machine/pit8253.h"
#include "machine/8255ppi.h"
#include "machine/8237dma.h"
#include "machine/pic8259.h"
#include "machine/mc146818.h"
#include "sound/hc55516.h"
#include "sound/speaker.h"
#include "video/pc_cga.h"


class pcxt_state : public driver_device
{
public:
	pcxt_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) { }

	UINT8 m_bg_bank;
	int m_bank;
	int m_lastvalue;
	UINT8 m_disk_data[2];
	UINT8 m_port_b_data;
	UINT8 m_wss1_data;
	UINT8 m_wss2_data;
	UINT8 m_status;
	UINT8 m_clr_status;
	int m_dma_channel;
	UINT8 m_dma_offset[2][4];
	UINT8 m_at_pages[0x10];
	UINT8 m_pc_spkrdata, m_pc_input;

	device_t	*m_pit8253;
	device_t	*m_pic8259_1;
	device_t	*m_pic8259_2;
	device_t	*m_dma8237_1;
	device_t	*m_dma8237_2;
};

static SCREEN_UPDATE( tetriskr )
{
	pcxt_state *state = screen.machine().driver_data<pcxt_state>();
	int x,y;
	int yi;
	const UINT8 *bg_rom = screen.machine().region("gfx2")->base();

	//popmessage("%04x",m_start_offs);

	bitmap.fill(get_black_pen(screen.machine()), cliprect);

	for(y=0;y<200/8;y++)
	{
		for(yi=0;yi<8;yi++)
		{
			for(x=0;x<320/8;x++)
			{
				UINT8 color;
				int xi,pen_i;

				for(xi=0;xi<8;xi++)
				{
					color = 0;
					/* TODO: first byte seems bogus? */
					for(pen_i = 0;pen_i<4;pen_i++)
						color |= ((bg_rom[y*320/8+x+(pen_i*0x20000)+yi*0x400+state->m_bg_bank*0x2000+1] >> (7-xi)) & 1) << pen_i;

					if((x+xi)<screen.visible_area().max_x && ((y)+yi)<screen.visible_area().max_y)
						bitmap.pix16(y*8+yi, x*8+xi) = screen.machine().pens[color];
				}
			}
		}
	}

	SCREEN_UPDATE_CALL(mc6845_cga);
	return 0;
}


static READ8_HANDLER( disk_iobank_r )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	//printf("Read Prototyping card [%02x] @ PC=%05x\n",offset,cpu_get_pc(&space->device()));
	//if(offset == 0) return input_port_read(space->machine(), "DSW");
	if(offset == 1) return input_port_read(space->machine(), "IN1");

	return state->m_disk_data[offset];
}

static WRITE8_HANDLER( disk_iobank_w )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
/*
    BIOS does a single out $0310,$F0 on reset

    Then does 2 outs to set the bank..

        X1  X2

        $F0 $F2 = m0
        $F1 $F2 = m1
        $F0 $F3 = m2
        $F1 $F3 = m3

    The sequence of

    out $0310,X1
    out $0310,X2

    sets the selected rom that appears in $C0000-$CFFFF

*/
	int newbank = 0;

//  printf("bank %d set to %02X\n", offset,data);

	if (data == 0xF0)
	{
		newbank = 0;
	}
	else
	{
		if((state->m_lastvalue == 0xF0) && (data == 0xF2))
			newbank = 0;
		else if ((state->m_lastvalue == 0xF1) && (data == 0xF2))
			newbank = 1;
		else if ((state->m_lastvalue == 0xF0) && (data == 0xF3))
			newbank = 2;
		else if ((state->m_lastvalue == 0xF1) && (data == 0xF3))
			newbank = 3;
	}

//  printf("newbank = %d\n", newbank);

	if (newbank != state->m_bank)
	{
		state->m_bank = newbank;
		memory_set_bankptr(space->machine(),  "bank1",space->machine().region("game_prg")->base() + 0x10000 * state->m_bank );
	}

	state->m_lastvalue = data;

	state->m_disk_data[offset] = data;
}

/*********************************
Pit8253
*********************************/

UINT8 pc_speaker_get_spk(running_machine &machine)
{
	pcxt_state *state = machine.driver_data<pcxt_state>();
	return state->m_pc_spkrdata & state->m_pc_input;
}


void pc_speaker_set_spkrdata(running_machine &machine, UINT8 data)
{
	device_t *speaker = machine.device("speaker");
	pcxt_state *state = machine.driver_data<pcxt_state>();
	state->m_pc_spkrdata = data ? 1 : 0;
	speaker_level_w( speaker, pc_speaker_get_spk(machine) );
}


void pc_speaker_set_input(running_machine &machine, UINT8 data)
{
	device_t *speaker = machine.device("speaker");
	pcxt_state *state = machine.driver_data<pcxt_state>();
	state->m_pc_input = data ? 1 : 0;
	speaker_level_w( speaker, pc_speaker_get_spk(machine) );
}


static WRITE_LINE_DEVICE_HANDLER( ibm5150_pit8253_out2_changed )
{
	pc_speaker_set_input( device->machine(), state );
}


static const struct pit8253_config pc_pit8253_config =
{
	{
		{
			XTAL_14_31818MHz/12,				/* heartbeat IRQ */
			DEVCB_NULL,
			DEVCB_DEVICE_LINE("pic8259_1", pic8259_ir0_w)
		}, {
			XTAL_14_31818MHz/12,				/* dram refresh */
			DEVCB_NULL,
			DEVCB_NULL
		}, {
			XTAL_14_31818MHz/12,				/* pio port c pin 4, and speaker polling enough */
			DEVCB_NULL,
			DEVCB_LINE(ibm5150_pit8253_out2_changed)
		}
	}
};


static READ8_DEVICE_HANDLER( port_a_r )
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();
	if(!(state->m_port_b_data & 0x80))//???
	{
		/*
        x--- ---- Undefined (Always 0)
        -x-- ---- B: Floppy disk drive installed.
        --xx ---- Default Display Mode
        ---- xx-- Undefined (Always 1)
        ---- --x- 8087 NDP installed
        ---- ---x Undefined (Always 1)
        */
		return state->m_wss1_data;
	}
	else//keyboard emulation
	{
		//cputag_set_input_line(device->machine(), "maincpu", 1, PULSE_LINE);
		return 0x00;//Keyboard is disconnected
		//return 0xaa;//Keyboard code
	}
}

static READ8_DEVICE_HANDLER( port_b_r )
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();
	return state->m_port_b_data;
}

static READ8_DEVICE_HANDLER( port_c_r )
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();
	int timer2_output = pit8253_get_output( state->m_pit8253, 2 );
	if ( state->m_port_b_data & 0x01 )
	{
		state->m_wss2_data = ( state->m_wss2_data & ~0x10 ) | ( timer2_output ? 0x10 : 0x00 );
	}
	state->m_wss2_data = ( state->m_wss2_data & ~0x20 ) | ( timer2_output ? 0x20 : 0x00 );

	return state->m_wss2_data;//TODO
}

/*'buzzer' sound routes here*/
/* Filetto uses this for either beep and um5100 sound routing,probably there's a mux somewhere.*/
/* The Korean Tetris uses it as a regular buzzer,probably the sound is all in there...*/
static WRITE8_DEVICE_HANDLER( port_b_w )
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();

	/* PPI controller port B*/
	pit8253_gate2_w(state->m_pit8253, BIT(data, 0));
	pc_speaker_set_spkrdata( device->machine(), data & 0x02 );
	state->m_port_b_data = data;
// device_t *beep = device->machine().device("beep");
// device_t *cvsd = device->machine().device("cvsd");
//  hc55516_digit_w(cvsd, data);
//  popmessage("%02x\n",data);
//  beep_set_state(beep, 0);
//  beep_set_state(beep, 1);
//  beep_set_frequency(beep, state->m_port_b_data);
}

static WRITE8_DEVICE_HANDLER( wss_1_w )
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();
	state->m_wss1_data = data;
}

static WRITE8_DEVICE_HANDLER( wss_2_w )
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();
	state->m_wss2_data = data;
}

static WRITE8_DEVICE_HANDLER( sys_reset_w )
{
	cputag_set_input_line(device->machine(), "maincpu", INPUT_LINE_RESET, PULSE_LINE);
}


static const ppi8255_interface filetto_ppi8255_intf[2] =
{
	{
		DEVCB_HANDLER(port_a_r),		/* Port A read */
		DEVCB_HANDLER(port_b_r),		/* Port B read */
		DEVCB_HANDLER(port_c_r),		/* Port C read */
		DEVCB_NULL, 					/* Port A write */
		DEVCB_HANDLER(port_b_w),		/* Port B write */
		DEVCB_NULL						/* Port C write */
	},
	{
		DEVCB_NULL,						/* Port A read */
		DEVCB_NULL,						/* Port B read */
		DEVCB_NULL,						/* Port C read */
		DEVCB_HANDLER(wss_1_w),			/* Port A write */
		DEVCB_HANDLER(wss_2_w),			/* Port B write */
		DEVCB_HANDLER(sys_reset_w)		/* Port C write */
	}
};

/*Floppy Disk Controller 765 device*/
/*Currently we only emulate it at a point that the BIOS will pass the checks*/

#define FDC_BUSY 0x10
#define FDC_WRITE 0x40
#define FDC_READ 0x00 /*~0x40*/

static READ8_HANDLER( fdc765_status_r )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	UINT8 tmp;
//  popmessage("Read FDC status @ PC=%05x",cpu_get_pc(&space->device()));
	tmp = state->m_status | 0x80;
	state->m_clr_status++;
	if(state->m_clr_status == 0x10)
	{
		state->m_status = 0;
		state->m_clr_status = 0;
	}
	return tmp;
}

static READ8_HANDLER( fdc765_data_r )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	state->m_status = (FDC_READ);
	return 0xc0;
}

static WRITE8_HANDLER( fdc765_data_w )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	state->m_status = (FDC_WRITE);
}


static WRITE8_HANDLER( drive_selection_w )
{
//	pcxt_state *state = space->machine().driver_data<pcxt_state>();

	/* TODO: properly hook-up upd765 FDC there */
	pic8259_ir6_w(space->machine().device("pic8259_1"), 1);
}

/******************
DMA8237 Controller
******************/


static WRITE_LINE_DEVICE_HANDLER( pc_dma_hrq_changed )
{
	cputag_set_input_line(device->machine(), "maincpu", INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE);

	/* Assert HLDA */
	i8237_hlda_w( device, state );
}


static READ8_HANDLER( pc_dma_read_byte )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	offs_t page_offset = (((offs_t) state->m_dma_offset[0][state->m_dma_channel]) << 16)
		& 0xFF0000;

	return space->read_byte(page_offset + offset);
}


static WRITE8_HANDLER( pc_dma_write_byte )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	offs_t page_offset = (((offs_t) state->m_dma_offset[0][state->m_dma_channel]) << 16)
		& 0xFF0000;

	space->write_byte(page_offset + offset, data);
}

static READ8_HANDLER(dma_page_select_r)
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	UINT8 data = state->m_at_pages[offset % 0x10];

	switch(offset % 8) {
	case 1:
		data = state->m_dma_offset[(offset / 8) & 1][2];
		break;
	case 2:
		data = state->m_dma_offset[(offset / 8) & 1][3];
		break;
	case 3:
		data = state->m_dma_offset[(offset / 8) & 1][1];
		break;
	case 7:
		data = state->m_dma_offset[(offset / 8) & 1][0];
		break;
	}
	return data;
}


static WRITE8_HANDLER(dma_page_select_w)
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();
	state->m_at_pages[offset % 0x10] = data;

	switch(offset % 8) {
	case 1:
		state->m_dma_offset[(offset / 8) & 1][2] = data;
		break;
	case 2:
		state->m_dma_offset[(offset / 8) & 1][3] = data;
		break;
	case 3:
		state->m_dma_offset[(offset / 8) & 1][1] = data;
		break;
	case 7:
		state->m_dma_offset[(offset / 8) & 1][0] = data;
		break;
	}
}

static void set_dma_channel(device_t *device, int channel, int state)
{
	pcxt_state *drvstate = device->machine().driver_data<pcxt_state>();
	if (!state) drvstate->m_dma_channel = channel;
}

static WRITE_LINE_DEVICE_HANDLER( pc_dack0_w ) { set_dma_channel(device, 0, state); }
static WRITE_LINE_DEVICE_HANDLER( pc_dack1_w ) { set_dma_channel(device, 1, state); }
static WRITE_LINE_DEVICE_HANDLER( pc_dack2_w ) { set_dma_channel(device, 2, state); }
static WRITE_LINE_DEVICE_HANDLER( pc_dack3_w ) { set_dma_channel(device, 3, state); }

static I8237_INTERFACE( dma8237_1_config )
{
	DEVCB_LINE(pc_dma_hrq_changed),
	DEVCB_NULL,
	DEVCB_MEMORY_HANDLER("maincpu", PROGRAM, pc_dma_read_byte),
	DEVCB_MEMORY_HANDLER("maincpu", PROGRAM, pc_dma_write_byte),
	{ DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL },
	{ DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL },
	{ DEVCB_LINE(pc_dack0_w), DEVCB_LINE(pc_dack1_w), DEVCB_LINE(pc_dack2_w), DEVCB_LINE(pc_dack3_w) }
};

/******************
8259 IRQ controller
******************/

static WRITE_LINE_DEVICE_HANDLER( pic8259_1_set_int_line )
{
	cputag_set_input_line(device->machine(), "maincpu", 0, state ? HOLD_LINE : CLEAR_LINE);
}

static READ8_DEVICE_HANDLER( get_slave_ack )
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();
	if (offset==2) { // IRQ = 2
		return pic8259_acknowledge(state->m_pic8259_2);
	}
	return 0x00;
}

static const struct pic8259_interface pic8259_1_config =
{
	DEVCB_LINE(pic8259_1_set_int_line),
	DEVCB_LINE_VCC,
	DEVCB_HANDLER(get_slave_ack)
};

static const struct pic8259_interface pic8259_2_config =
{
	DEVCB_DEVICE_LINE("pic8259_1", pic8259_ir2_w),
	DEVCB_LINE_GND,
	DEVCB_NULL
};

static IRQ_CALLBACK(irq_callback)
{
	pcxt_state *state = device->machine().driver_data<pcxt_state>();
	return pic8259_acknowledge(state->m_pic8259_1);
}

static ADDRESS_MAP_START( filetto_map, AS_PROGRAM, 8 )
	AM_RANGE(0x00000, 0x9ffff) AM_RAM //work RAM 640KB
	AM_RANGE(0xa0000, 0xbffff) AM_RAM //CGA VRAM
	AM_RANGE(0xc0000, 0xcffff) AM_ROMBANK("bank1")
	AM_RANGE(0xd0000, 0xeffff) AM_NOP
	AM_RANGE(0xf0000, 0xfffff) AM_ROM
ADDRESS_MAP_END

static ADDRESS_MAP_START( pcxt_io_common, AS_IO, 8 )
	ADDRESS_MAP_GLOBAL_MASK(0x3ff)
	AM_RANGE(0x0000, 0x000f) AM_DEVREADWRITE("dma8237_1", i8237_r, i8237_w ) //8237 DMA Controller
	AM_RANGE(0x0020, 0x002f) AM_DEVREADWRITE("pic8259_1", pic8259_r, pic8259_w ) //8259 Interrupt control
	AM_RANGE(0x0040, 0x0043) AM_DEVREADWRITE("pit8253", pit8253_r, pit8253_w)    //8253 PIT
	AM_RANGE(0x0060, 0x0063) AM_DEVREADWRITE("ppi8255_0", ppi8255_r, ppi8255_w)  //PPI 8255
	AM_RANGE(0x0064, 0x0066) AM_DEVREADWRITE("ppi8255_1", ppi8255_r, ppi8255_w)  //PPI 8255
	AM_RANGE(0x0070, 0x007f) AM_DEVREADWRITE_MODERN("rtc", mc146818_device, read, write)
	AM_RANGE(0x0080, 0x0087) AM_READWRITE(dma_page_select_r,dma_page_select_w)
	AM_RANGE(0x00a0, 0x00af) AM_DEVREADWRITE("pic8259_2", pic8259_r, pic8259_w )
	AM_RANGE(0x0278, 0x027f) AM_RAM //printer (parallel) port latch
	AM_RANGE(0x02f8, 0x02ff) AM_RAM //Modem port
	AM_RANGE(0x0378, 0x037f) AM_RAM //printer (parallel) port
	AM_RANGE(0x03bc, 0x03bf) AM_RAM //printer port
	AM_RANGE(0x03f2, 0x03f2) AM_WRITE(drive_selection_w)
	AM_RANGE(0x03f4, 0x03f4) AM_READ(fdc765_status_r) //765 Floppy Disk Controller (FDC) Status
	AM_RANGE(0x03f5, 0x03f5) AM_READWRITE(fdc765_data_r,fdc765_data_w)//FDC Data
	AM_RANGE(0x03f8, 0x03ff) AM_RAM //rs232c (serial) port
ADDRESS_MAP_END

static ADDRESS_MAP_START( filetto_io, AS_IO, 8 )
	ADDRESS_MAP_GLOBAL_MASK(0x3ff)
	AM_IMPORT_FROM( pcxt_io_common )
//  AM_RANGE(0x0200, 0x020f) AM_RAM //game port
	AM_RANGE(0x0201, 0x0201) AM_READ_PORT("COIN") //game port
	AM_RANGE(0x0310, 0x0311) AM_READWRITE(disk_iobank_r,disk_iobank_w) //Prototyping card
	AM_RANGE(0x0312, 0x0312) AM_READ_PORT("IN0") //Prototyping card,read only
ADDRESS_MAP_END

static WRITE8_HANDLER( tetriskr_bg_bank_w )
{
	pcxt_state *state = space->machine().driver_data<pcxt_state>();

	state->m_bg_bank = (data & 0x0f) ^ 8;
}

static ADDRESS_MAP_START( tetriskr_io, AS_IO, 8 )
	ADDRESS_MAP_GLOBAL_MASK(0x3ff)
	AM_IMPORT_FROM( pcxt_io_common )
	AM_RANGE(0x0200, 0x020f) AM_RAM //game port
	AM_RANGE(0x03c0, 0x03c0) AM_WRITE(tetriskr_bg_bank_w)
	AM_RANGE(0x03c8, 0x03c8) AM_READ_PORT("IN0")
	AM_RANGE(0x03c9, 0x03c9) AM_READ_PORT("IN1")
//  AM_RANGE(0x03ce, 0x03ce) AM_READ_PORT("IN1") //read then discarded?
ADDRESS_MAP_END

static INPUT_PORTS_START( filetto )
	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_PLAYER(1)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_PLAYER(1)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_PLAYER(1)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_PLAYER(2)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_PLAYER(2)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_PLAYER(2)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)

	PORT_START("IN1")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Coinage ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 1C_1C ) )
	PORT_DIPNAME( 0x02, 0x00, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, "Extra Play" )
	PORT_DIPSETTING(    0x04, DEF_STR( No ) )
	PORT_DIPSETTING(    0x00, "Play at 6th match reached" )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Difficulty ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Hard ) )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("COIN")
	PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START( "pcvideo_cga_config" )
	PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_UNUSED )
INPUT_PORTS_END

static INPUT_PORTS_START( tetriskr )
	PORT_START("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(2)
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) //probably unused
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_PLAYER(1)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_PLAYER(1)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_PLAYER(1)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START1 )
	PORT_START("IN1") //dip-switches
	PORT_DIPNAME( 0x03, 0x03, "Starting Level" )
	PORT_DIPSETTING(    0x03, "0" )
	PORT_DIPSETTING(    0x02, "2" )
	PORT_DIPSETTING(    0x01, "4" )
	PORT_DIPSETTING(    0x00, "6" )
	PORT_DIPNAME( 0x04, 0x04, "Starting Bomb" )
	PORT_DIPSETTING(    0x00, DEF_STR( No ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Yes ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Coinage ) )
//	PORT_DIPSETTING(    0x00, DEF_STR( 2C_1C ) ) duplicate
	PORT_DIPSETTING(    0x40, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_2C ) )

	PORT_START( "pcvideo_cga_config" )
	PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_UNUSED )
INPUT_PORTS_END



/* F4 Character Displayer */
static const gfx_layout pc_16_charlayout =
{
	8, 16,					/* 8 x 16 characters */
	256,					/* 256 characters */
	1,					/* 1 bits per pixel */
	{ 0 },					/* no bitplanes */
	/* x offsets */
	{ 0, 1, 2, 3, 4, 5, 6, 7 },
	/* y offsets */
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 2048*8, 2049*8, 2050*8, 2051*8, 2052*8, 2053*8, 2054*8, 2055*8 },
	8*8					/* every char takes 2 x 8 bytes */
};

static const gfx_layout pc_8_charlayout =
{
	8, 8,					/* 8 x 8 characters */
	512,					/* 512 characters */
	1,					/* 1 bits per pixel */
	{ 0 },					/* no bitplanes */
	/* x offsets */
	{ 0, 1, 2, 3, 4, 5, 6, 7 },
	/* y offsets */
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
	8*8					/* every char takes 8 bytes */
};

static GFXDECODE_START( pcxt )
	GFXDECODE_ENTRY( "gfx1", 0x0000, pc_16_charlayout,    3, 1 )
	GFXDECODE_ENTRY( "gfx1", 0x1000, pc_8_charlayout,   3, 1 )
GFXDECODE_END


static MACHINE_RESET( filetto )
{
	pcxt_state *state = machine.driver_data<pcxt_state>();
	device_t *speaker = machine.device("speaker");
	state->m_bank = -1;
	state->m_lastvalue = -1;
	device_set_irq_callback(machine.device("maincpu"), irq_callback);
	state->m_pit8253 = machine.device( "pit8253" );
	state->m_pic8259_1 = machine.device( "pic8259_1" );
	state->m_pic8259_2 = machine.device( "pic8259_2" );
	state->m_dma8237_1 = machine.device( "dma8237_1" );
	state->m_dma8237_2 = machine.device( "dma8237_2" );

	state->m_pc_spkrdata = 0;
	state->m_pc_input = 0;

	speaker_level_w( speaker, 0 );
}

static MACHINE_CONFIG_START( filetto, pcxt_state )
	MCFG_CPU_ADD("maincpu", I8088, XTAL_14_31818MHz/3)
	MCFG_CPU_PROGRAM_MAP(filetto_map)
	MCFG_CPU_IO_MAP(filetto_io)

	MCFG_MACHINE_RESET( filetto )

	MCFG_PIT8253_ADD( "pit8253", pc_pit8253_config )

	MCFG_PPI8255_ADD( "ppi8255_0", filetto_ppi8255_intf[0] )
	MCFG_PPI8255_ADD( "ppi8255_1", filetto_ppi8255_intf[1] )

	MCFG_I8237_ADD( "dma8237_1", XTAL_14_31818MHz/3, dma8237_1_config )

	MCFG_PIC8259_ADD( "pic8259_1", pic8259_1_config )

	MCFG_PIC8259_ADD( "pic8259_2", pic8259_2_config )

	MCFG_MC146818_ADD( "rtc", MC146818_STANDARD )

	MCFG_FRAGMENT_ADD( pcvideo_cga )
	MCFG_GFXDECODE(pcxt)

	/*Sound Hardware*/
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_SOUND_ADD("voice", HC55516, 8000000/4)//8923S-UM5100 is a HC55536 with ROM hook-up
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.60)

//  PC "buzzer" sound
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.20)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( tetriskr, filetto )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_IO_MAP(tetriskr_io)

	MCFG_DEVICE_MODIFY("screen")
	MCFG_VIDEO_START(pc_cga_superimpose)
	MCFG_SCREEN_UPDATE(tetriskr)

	MCFG_DEVICE_REMOVE("voice")
MACHINE_CONFIG_END

ROM_START( filetto )
	ROM_REGION( 0x100000, "maincpu", 0 )
	ROM_LOAD("u49.bin", 0xfc000, 0x2000, CRC(1be6948a) SHA1(9c433f63d347c211ee4663f133e8417221bc4bf0))
	ROM_RELOAD(         0xf8000, 0x2000 )
	ROM_RELOAD(         0xf4000, 0x2000 )
	ROM_RELOAD(         0xf0000, 0x2000 )
	ROM_LOAD("u55.bin", 0xfe000, 0x2000, CRC(1e455ed7) SHA1(786d18ce0ab1af45fc538a2300853e497488f0d4) )
	ROM_RELOAD(         0xfa000, 0x2000 )
	ROM_RELOAD(         0xf6000, 0x2000 )
	ROM_RELOAD(         0xf2000, 0x2000 )

	ROM_REGION( 0x40000, "game_prg", 0 ) // program data
	ROM_LOAD( "m0.u1", 0x00000, 0x10000, CRC(2408289d) SHA1(eafc144a557a79b58bcb48545cb9c9778e61fcd3) )
	ROM_LOAD( "m1.u2", 0x10000, 0x10000, CRC(5b623114) SHA1(0d9a14e6b7f57ce4fa09762343b610a973910f58) )
	ROM_LOAD( "m2.u3", 0x20000, 0x10000, CRC(abc64869) SHA1(564fc9d90d241a7b7776160b3fd036fb08037355) )
	ROM_LOAD( "m3.u4", 0x30000, 0x10000, CRC(0c1e8a67) SHA1(f1b9280c65fcfcb5ec481cae48eb6f52d6cdbc9d) )

	ROM_REGION( 0x2000, "gfx1", 0 )
	ROM_LOAD("u67.bin", 0x0000, 0x2000, CRC(09710122) SHA1(de84bdd9245df287bbd3bb808f0c3531d13a3545) )

	ROM_REGION( 0x40000, "samples", 0 ) // UM5100 sample roms?
	ROM_LOAD16_BYTE("v1.u15",  0x00000, 0x20000, CRC(613ddd07) SHA1(ebda3d559315879819cb7034b5696f8e7861fe42) )
	ROM_LOAD16_BYTE("v2.u14",  0x00001, 0x20000, CRC(427e012e) SHA1(50514a6307e63078fe7444a96e39d834684db7df) )
ROM_END

ROM_START( tetriskr )
	ROM_REGION( 0x100000, "maincpu", 0 ) /* code */
	ROM_LOAD( "b-10.u10", 0xf0000, 0x10000, CRC(efc2a0f6) SHA1(5f0f1e90237bee9b78184035a32055b059a91eb3) )

	ROM_REGION( 0x2000, "gfx1",ROMREGION_ERASE00 ) /* gfx - 1bpp font*/
	ROM_LOAD( "b-3.u36", 0x1800, 0x0800, CRC(1a636f9a) SHA1(a356cc57914d0c9b9127670b55d1f340e64b1ac9) )
	ROM_IGNORE( 0x1800 )

	ROM_REGION( 0x80000+1, "gfx2",ROMREGION_INVERT | ROMREGION_ERASEFF )
	ROM_LOAD( "b-1.u59", 0x00000, 0x10000, CRC(4719d986) SHA1(6e0499944b968d96fbbfa3ead6237d69c769d634))
	ROM_LOAD( "b-2.u58", 0x10000, 0x10000, CRC(599e1154) SHA1(14d99f90b4fedeab0ac24ffa9b1fd9ad0f0ba699))
	ROM_LOAD( "b-4.u54", 0x20000, 0x10000, CRC(e112c450) SHA1(dfdecfc6bd617ec520b7563b7caf44b79d498bd3))
	ROM_LOAD( "b-5.u53", 0x30000, 0x10000, CRC(050b7650) SHA1(5981dda4ed43b6e81fbe48bfba90a8775d5ecddf))
	ROM_LOAD( "b-6.u49", 0x40000, 0x10000, CRC(d596ceb0) SHA1(8c82fb638688971ef11159a6b240253e63f0949d))
	ROM_LOAD( "b-7.u48", 0x50000, 0x10000, CRC(79336b6c) SHA1(7a95875f3071bdc3ee25c0e6a5a3c00ef02dc977))
	ROM_LOAD( "b-8.u44", 0x60000, 0x10000, CRC(1f82121a) SHA1(106da0f39f1260d0761217ed0a24c1611bfd7f05))
	ROM_LOAD( "b-9.u43", 0x70000, 0x10000, CRC(4ea22349) SHA1(14dfd3dbd51f8bd6f3290293b8ea1c165e8cf7fd))
ROM_END

static DRIVER_INIT( filetto )
{
	//...
}

static DRIVER_INIT( tetriskr )
{
	//...
}

GAME( 1990, filetto,  0, filetto,  filetto,  filetto,  ROT0,  "Novarmatic", "Filetto (v1.05 901009)",GAME_IMPERFECT_SOUND )
GAME( 1988?,tetriskr, 0, tetriskr, tetriskr, tetriskr, ROT0,  "bootleg",    "Tetris (bootleg of Mirrorsoft PC-XT Tetris version)", GAME_IMPERFECT_SOUND | GAME_NOT_WORKING )