summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/pcd.c
blob: cc717e1e5ba8b20e3a810efd1a4ab2c5f0dc05f5 (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
/***************************************************************************

    Siemens PC-D

    license: MAME, GPL-2.0+
    copyright-holders: Dirk Best

    Skeleton driver

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

#include "emu.h"
#include "cpu/i86/i186.h"
#include "machine/ram.h"
#include "machine/nvram.h"
#include "machine/pic8259.h"
#include "machine/mc2661.h"
#include "machine/wd_fdc.h"
#include "machine/mc146818.h"
#include "machine/pcd_kbd.h"
#include "sound/speaker.h"
#include "video/scn2674.h"
#include "formats/pc_dsk.h"
#include "bus/scsi/omti5100.h"

//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

class pcd_state : public driver_device
{
public:
	pcd_state(const machine_config &mconfig, device_type type, const char *tag) :
	driver_device(mconfig, type, tag),
	m_maincpu(*this, "maincpu"),
	m_pic1(*this, "pic1"),
	m_pic2(*this, "pic2"),
	m_speaker(*this, "speaker"),
	m_fdc(*this, "fdc"),
	m_rtc(*this, "rtc"),
	m_crtc(*this, "crtc"),
	m_palette(*this, "palette"),
	m_gfxdecode(*this, "gfxdecode"),
	m_scsi(*this, "scsi"),
	m_scsi_data_out(*this, "scsi_data_out"),
	m_scsi_data_in(*this, "scsi_data_in"),
	m_vram(*this, "vram"),
	m_charram(8*1024)
	{ }

	DECLARE_READ8_MEMBER( irq_callback );
	TIMER_DEVICE_CALLBACK_MEMBER( timer0_tick );
	DECLARE_WRITE_LINE_MEMBER( i186_timer1_w );

	DECLARE_READ8_MEMBER( nmi_io_r );
	DECLARE_WRITE8_MEMBER( nmi_io_w );
	DECLARE_READ8_MEMBER( rtc_r );
	DECLARE_WRITE8_MEMBER( rtc_w );
	DECLARE_READ8_MEMBER( stat_r );
	DECLARE_WRITE8_MEMBER( stat_w );
	DECLARE_READ8_MEMBER( led_r );
	DECLARE_WRITE8_MEMBER( led_w );
	DECLARE_READ8_MEMBER( detect_r );
	DECLARE_WRITE8_MEMBER( detect_w );
	DECLARE_READ16_MEMBER( dskctl_r );
	DECLARE_WRITE16_MEMBER( dskctl_w );
	DECLARE_READ8_MEMBER( mcu_r );
	DECLARE_WRITE8_MEMBER( mcu_w );
	DECLARE_READ8_MEMBER( scsi_r );
	DECLARE_WRITE8_MEMBER( scsi_w );
	DECLARE_WRITE8_MEMBER( vram_sw_w );
	DECLARE_WRITE16_MEMBER( vram_w );
	SCN2674_DRAW_CHARACTER_MEMBER(display_pixels);
	DECLARE_FLOPPY_FORMATS( floppy_formats );
	DECLARE_WRITE_LINE_MEMBER(write_scsi_bsy);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_cd);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_io);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_msg);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_req);

protected:
	// driver_device overrides
	virtual void machine_start();
	virtual void machine_reset();
	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);

private:
	required_device<i80186_cpu_device> m_maincpu;
	required_device<pic8259_device> m_pic1;
	required_device<pic8259_device> m_pic2;
	required_device<speaker_sound_device> m_speaker;
	required_device<wd2793_t> m_fdc;
	required_device<mc146818_device> m_rtc;
	required_device<scn2674_device> m_crtc;
	required_device<palette_device> m_palette;
	required_device<gfxdecode_device> m_gfxdecode;
	required_device<SCSI_PORT_DEVICE> m_scsi;
	required_device<output_latch_device> m_scsi_data_out;
	required_device<input_buffer_device> m_scsi_data_in;
	required_shared_ptr<UINT16> m_vram;
	dynamic_buffer m_charram;
	UINT8 m_stat, m_led, m_vram_sw;
	int m_msg, m_bsy, m_io, m_cd, m_req, m_rst;
	emu_timer *m_req_hack;
	UINT16 m_dskctl;
};


//**************************************************************************
//  MACHINE EMULATION
//**************************************************************************

static const gfx_layout pcd_charlayout =
{
	8, 14,                   /* 8 x 14 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, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8 },
	8*16
};

void pcd_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
	// TODO: remove this hack
	if(m_req)
		m_maincpu->drq0_w(1);
}

void pcd_state::machine_start()
{
	m_gfxdecode->set_gfx(0, global_alloc(gfx_element(machine().device<palette_device>("palette"), pcd_charlayout, &m_charram[0], 0, 1, 0)));
	m_req_hack = timer_alloc();
}

void pcd_state::machine_reset()
{
	m_stat = 0;
	m_led = 0;
	m_dskctl = 0;
	m_vram_sw = 1;
	m_rst = 0;
}

READ8_MEMBER( pcd_state::irq_callback )
{
	return (offset ? m_pic2 : m_pic1)->acknowledge();
}

TIMER_DEVICE_CALLBACK_MEMBER( pcd_state::timer0_tick )
{
	m_maincpu->tmrin0_w(0);
	m_maincpu->tmrin0_w(1);
}

WRITE_LINE_MEMBER( pcd_state::i186_timer1_w )
{
	m_speaker->level_w(state);
}

WRITE16_MEMBER( pcd_state::vram_w )
{
	if(m_vram_sw)
		COMBINE_DATA(&m_vram[offset]);
	else if(mem_mask & 0xff)
	{
		m_charram[offset & 0x1fff] = data;
		m_gfxdecode->gfx(0)->mark_dirty(offset/16);
	}
}

WRITE8_MEMBER( pcd_state::vram_sw_w )
{
	m_vram_sw = data & 1;
}

READ8_MEMBER( pcd_state::nmi_io_r )
{
	if(space.debugger_access())
		return 0;
	logerror("%s: unmapped %s %04x\n", machine().describe_context(), space.name(), offset);
	m_stat |= 8;
	m_maincpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
	return 0;
}

WRITE8_MEMBER( pcd_state::nmi_io_w )
{
	if(space.debugger_access())
		return;
	logerror("%s: unmapped %s %04x\n", machine().describe_context(), space.name(), offset);
	m_stat |= 8;
	m_maincpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
}

READ8_MEMBER( pcd_state::rtc_r )
{
	m_rtc->write(space, 0, offset);
	return m_rtc->read(space, 1);
}

WRITE8_MEMBER( pcd_state::rtc_w )
{
	m_rtc->write(space, 0, offset);
	m_rtc->write(space, 1, data);
}

READ8_MEMBER( pcd_state::stat_r )
{
	return m_stat;
}

WRITE8_MEMBER( pcd_state::stat_w )
{
	m_stat &= ~data;
}

READ8_MEMBER( pcd_state::detect_r )
{
	return 0;
}

WRITE8_MEMBER( pcd_state::detect_w )
{
}

READ8_MEMBER( pcd_state::mcu_r )
{
	return 0x20;
}

WRITE8_MEMBER( pcd_state::mcu_w )
{
}

READ16_MEMBER( pcd_state::dskctl_r )
{
	return m_dskctl;
}

WRITE16_MEMBER( pcd_state::dskctl_w )
{
	floppy_image_device *floppy0 = m_fdc->subdevice<floppy_connector>("0")->get_device();
	floppy_image_device *floppy1 = m_fdc->subdevice<floppy_connector>("1")->get_device();

	COMBINE_DATA(&m_dskctl);

	if((m_dskctl & 1) && floppy0)
		m_fdc->set_floppy(floppy0);
	if((m_dskctl & 2) && floppy1)
		m_fdc->set_floppy(floppy1);

	if(floppy0)
	{
		floppy0->mon_w(!(m_dskctl & 4));
		floppy0->ss_w((m_dskctl & 8) != 0);
	}
	if(floppy1)
	{
		floppy1->mon_w(!(m_dskctl & 4));
		floppy1->ss_w((m_dskctl & 8) != 0);
	}
}

READ8_MEMBER( pcd_state::led_r )
{
	// DIPs?
	// 0x01 no mmu
	// 0x10 enter monitor after post
	// 0x20 enter monitor before post
	return 0x01;
}

WRITE8_MEMBER( pcd_state::led_w )
{
	for(int i = 0; i < 6; i++)
		logerror("%c", (data & (1 << i)) ? '-' : '*');
	logerror("\n");
	m_led = data;
}

SCN2674_DRAW_CHARACTER_MEMBER(pcd_state::display_pixels)
{
	if(lg)
	{
		UINT16 data = m_vram[address];
		data = (data >> 8) | (data << 8);
		for(int i = 0; i < 16; i++)
			bitmap.pix32(y, x + i) = m_palette->pen((data & (1 << (15 - i))) ? 1 : 0);
	}
	else
	{
		UINT8 data = m_charram[(m_vram[address] & 0xff) * 16 + linecount];
		if(cursor && blink)
			data = 0xff;
		for(int i = 0; i < 8; i++)
			bitmap.pix32(y, x + i) = m_palette->pen((data & (1 << (7 - i))) ? 1 : 0);
	}
}

READ8_MEMBER(pcd_state::scsi_r)
{
	UINT8 ret = 0;

	switch(offset)
	{
		case 0:
		case 2:
			ret = m_scsi_data_in->read();
			m_scsi->write_ack(1);
			if(!offset)
				m_maincpu->drq0_w(0);
			break;

		case 1:
			ret = (m_cd << 7) | (m_req << 5) | (m_bsy << 4);
			break;
	}

	return ret;
}

WRITE8_MEMBER(pcd_state::scsi_w)
{
	switch(offset)
	{
		case 0:
			m_scsi_data_out->write(data);
			m_scsi->write_ack(1);
			if(m_cd)
			{
				m_maincpu->drq0_w(0);
				m_req_hack->adjust(attotime::never);
			}
			break;
		case 1:
			if(data & 4)
			{
				m_rst = 1;
				m_scsi->write_rst(1);
				break;
			}
			if(m_rst)
			{
				m_rst = 0;
				m_scsi->write_rst(0);
				break;
			}

			if(!m_bsy)
			{
				m_scsi_data_out->write(0);
				m_scsi->write_sel(1);
			}
			break;
	}
}

WRITE_LINE_MEMBER(pcd_state::write_scsi_bsy)
{
	m_bsy = state ? 1 : 0;
	m_scsi->write_sel(0);
}
WRITE_LINE_MEMBER(pcd_state::write_scsi_cd)
{
	m_cd = state ? 1 : 0;
}
WRITE_LINE_MEMBER(pcd_state::write_scsi_io)
{
	m_io = state ? 1 : 0;
}
WRITE_LINE_MEMBER(pcd_state::write_scsi_msg)
{
	m_msg = state ? 1 : 0;
}

WRITE_LINE_MEMBER(pcd_state::write_scsi_req)
{
	m_req = state ? 1 : 0;
	if(state)
	{
		if(!m_cd)
		{
			m_maincpu->drq0_w(1);
			m_req_hack->adjust(attotime::from_msec(10)); // poke the dmac
		}
		else if(m_msg)
		{
			m_scsi_data_in->read();
			m_scsi->write_ack(1);
		}
	}
	else
		m_scsi->write_ack(0);
}
//**************************************************************************
//  ADDRESS MAPS
//**************************************************************************

static ADDRESS_MAP_START( pcd_map, AS_PROGRAM, 16, pcd_state )
	AM_RANGE(0x00000, 0x7ffff) AM_RAM // fixed 512k for now
	AM_RANGE(0xf0000, 0xf7fff) AM_READONLY AM_WRITE(vram_w) AM_SHARE("vram")
	AM_RANGE(0xfc000, 0xfffff) AM_ROM AM_REGION("bios", 0)
	AM_RANGE(0x00000, 0xfffff) AM_READWRITE8(nmi_io_r, nmi_io_w, 0xffff)
ADDRESS_MAP_END

static ADDRESS_MAP_START( pcd_io, AS_IO, 16, pcd_state )
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE(0x0000, 0xefff) AM_READWRITE8(nmi_io_r, nmi_io_w, 0xffff)
	AM_RANGE(0xf000, 0xf7ff) AM_RAM AM_SHARE("nvram")
	AM_RANGE(0xf800, 0xf801) AM_DEVREADWRITE8("pic1", pic8259_device, read, write, 0xffff)
	AM_RANGE(0xf820, 0xf821) AM_DEVREADWRITE8("pic2", pic8259_device, read, write, 0xffff)
	AM_RANGE(0xf840, 0xf841) AM_READWRITE8(stat_r, stat_w, 0x00ff)
	AM_RANGE(0xf840, 0xf841) AM_READWRITE8(led_r, led_w, 0xff00)
	AM_RANGE(0xf880, 0xf8bf) AM_READWRITE8(rtc_r, rtc_w, 0xffff)
	AM_RANGE(0xf900, 0xf903) AM_DEVREADWRITE8("fdc", wd2793_t, read, write, 0xffff)
	AM_RANGE(0xf904, 0xf905) AM_READWRITE(dskctl_r, dskctl_w)
	AM_RANGE(0xf940, 0xf943) AM_READWRITE8(scsi_r, scsi_w, 0xffff)
	AM_RANGE(0xf980, 0xf98f) AM_DEVWRITE8("crtc", scn2674_device, write, 0x00ff)
	AM_RANGE(0xf980, 0xf98f) AM_DEVREAD8("crtc", scn2674_device, read, 0xff00)
	AM_RANGE(0xf9a0, 0xf9a1) AM_WRITE8(vram_sw_w, 0x00ff)
	AM_RANGE(0xf9b0, 0xf9b3) AM_READWRITE8(mcu_r, mcu_w, 0x00ff) // 8741 comms
	AM_RANGE(0xf9c0, 0xf9c3) AM_DEVREADWRITE8("usart1",mc2661_device,read,write,0xffff)  // UARTs
	AM_RANGE(0xf9d0, 0xf9d3) AM_DEVREADWRITE8("usart2",mc2661_device,read,write,0xffff)
	AM_RANGE(0xf9e0, 0xf9e3) AM_DEVREADWRITE8("usart3",mc2661_device,read,write,0xffff)
//  AM_RANGE(0xfa00, 0xfa7f) // pcs4-n (peripheral chip select)
	AM_RANGE(0xfb00, 0xfb01) AM_READWRITE8(detect_r, detect_w, 0xff00) // expansion card detection?
	AM_RANGE(0xfb00, 0xffff) AM_READWRITE8(nmi_io_r, nmi_io_w, 0xffff)
ADDRESS_MAP_END


//**************************************************************************
//  MACHINE DRIVERS
//**************************************************************************

static SLOT_INTERFACE_START( pcd_floppies )
	SLOT_INTERFACE("55f", TEAC_FD_55F)
	SLOT_INTERFACE("55g", TEAC_FD_55G)
	SLOT_INTERFACE("525dsqd", FLOPPY_525_QD) // the devices above cause a crash in floppy_image_format_t::generate_track_from_levels
SLOT_INTERFACE_END

FLOPPY_FORMATS_MEMBER( pcd_state::floppy_formats )
	FLOPPY_PC_FORMAT
FLOPPY_FORMATS_END

static MACHINE_CONFIG_START( pcd, pcd_state )
	MCFG_CPU_ADD("maincpu", I80186, XTAL_16MHz)
	MCFG_CPU_PROGRAM_MAP(pcd_map)
	MCFG_CPU_IO_MAP(pcd_io)
	MCFG_80186_TMROUT1_HANDLER(WRITELINE(pcd_state, i186_timer1_w))
	MCFG_80186_IRQ_SLAVE_ACK(READ8(pcd_state, irq_callback))

	MCFG_CPU_ADD("graphics", I8741, XTAL_16MHz/2)
	MCFG_DEVICE_DISABLE()

	MCFG_TIMER_DRIVER_ADD_PERIODIC("timer0_tick", pcd_state, timer0_tick, attotime::from_hz(XTAL_16MHz / 24)) // adjusted to pass post

	MCFG_PIC8259_ADD("pic1", DEVWRITELINE("maincpu", i80186_cpu_device, int0_w), VCC, NULL)
	MCFG_PIC8259_ADD("pic2", DEVWRITELINE("maincpu", i80186_cpu_device, int1_w), VCC, NULL)

#if 0
	MCFG_RAM_ADD(RAM_TAG)
	MCFG_RAM_DEFAULT_SIZE("256K")
	MCFG_RAM_EXTRA_OPTIONS("512K,1M")
#endif

	// nvram
	MCFG_NVRAM_ADD_1FILL("nvram")

	// floppy disk controller
	MCFG_WD2793x_ADD("fdc", XTAL_16MHz/8/2)
	MCFG_WD_FDC_INTRQ_CALLBACK(DEVWRITELINE("pic1", pic8259_device, ir6_w))
	MCFG_WD_FDC_DRQ_CALLBACK(DEVWRITELINE("maincpu", i80186_cpu_device, drq1_w))

	// floppy drives
	MCFG_FLOPPY_DRIVE_ADD("fdc:0", pcd_floppies, "525dsqd", pcd_state::floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD("fdc:1", pcd_floppies, "525dsqd", pcd_state::floppy_formats)

	// usart
	MCFG_DEVICE_ADD("usart1", MC2661, XTAL_4_9152MHz)
	MCFG_MC2661_RXRDY_HANDLER(DEVWRITELINE("pic1", pic8259_device, ir3_w))
	MCFG_MC2661_TXRDY_HANDLER(DEVWRITELINE("pic1", pic8259_device, ir3_w))
	MCFG_DEVICE_ADD("usart2", MC2661, XTAL_4_9152MHz)
	MCFG_MC2661_RXRDY_HANDLER(DEVWRITELINE("pic1", pic8259_device, ir2_w))
	//MCFG_MC2661_TXRDY_HANDLER(DEVWRITELINE("pic1", pic8259_device, ir2_w)) // this gets stuck high causing the keyboard to not work
	MCFG_MC2661_TXD_HANDLER(DEVWRITELINE("keyboard", pcd_keyboard_device, t0_w))
	MCFG_DEVICE_ADD("usart3", MC2661, XTAL_4_9152MHz)
	MCFG_MC2661_RXRDY_HANDLER(DEVWRITELINE("pic1", pic8259_device, ir4_w))
	MCFG_MC2661_TXRDY_HANDLER(DEVWRITELINE("pic1", pic8259_device, ir4_w))

	// sound hardware
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)

	// video hardware
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_SIZE(640, 350)
	MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 349)
	MCFG_SCREEN_REFRESH_RATE(50)
	MCFG_SCREEN_UPDATE_DEVICE("crtc", scn2674_device, screen_update)

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", empty)
	MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")

	MCFG_SCN2674_VIDEO_ADD("crtc", 0, NULL);
	MCFG_SCN2674_TEXT_CHARACTER_WIDTH(8)
	MCFG_SCN2674_GFX_CHARACTER_WIDTH(16)
	MCFG_SCN2674_DRAW_CHARACTER_CALLBACK_OWNER(pcd_state, display_pixels)

	// rtc
	MCFG_MC146818_ADD("rtc", XTAL_32_768kHz)
	MCFG_MC146818_IRQ_HANDLER(DEVWRITELINE("pic1", pic8259_device, ir7_w))

	MCFG_DEVICE_ADD("keyboard", PCD_KEYBOARD, 0)
	MCFG_PCD_KEYBOARD_OUT_TX_HANDLER(DEVWRITELINE("usart2", mc2661_device, rx_w))

	MCFG_DEVICE_ADD("scsi", SCSI_PORT, 0)
	MCFG_SCSI_DATA_INPUT_BUFFER("scsi_data_in")
	MCFG_SCSI_MSG_HANDLER(WRITELINE(pcd_state, write_scsi_msg))
	MCFG_SCSI_BSY_HANDLER(WRITELINE(pcd_state, write_scsi_bsy))
	MCFG_SCSI_IO_HANDLER(WRITELINE(pcd_state, write_scsi_io))
	MCFG_SCSI_CD_HANDLER(WRITELINE(pcd_state, write_scsi_cd))
	MCFG_SCSI_REQ_HANDLER(WRITELINE(pcd_state, write_scsi_req))

	MCFG_SCSI_OUTPUT_LATCH_ADD("scsi_data_out", "scsi")
	MCFG_DEVICE_ADD("scsi_data_in", INPUT_BUFFER, 0)
	MCFG_SCSIDEV_ADD("scsi:1", "harddisk", OMTI5100, SCSI_ID_0)
MACHINE_CONFIG_END


//**************************************************************************
//  ROM DEFINITIONS
//**************************************************************************

ROM_START( pcd )
	ROM_REGION(0x4000, "bios", 0)
	ROM_LOAD16_BYTE("s26361-d359.d42", 0x0001, 0x2000, CRC(e20244dd) SHA1(0ebc5ddb93baacd9106f1917380de58aac64fe73))
	ROM_LOAD16_BYTE("s26361-d359.d43", 0x0000, 0x2000, CRC(e03db2ec) SHA1(fcae8b0c9e7543706817b0a53872826633361fda))
	ROM_FILL(0xb64, 1, 0xe2)  // post expects 0xd0 fdc command to be instant, give it a delay
	ROM_FILL(0xb65, 1, 0xfe)
	ROM_FILL(0xb35, 1, 0x90)  // fdc delay_register_commit is too long
	ROM_FILL(0xb36, 1, 0x90)
	ROM_FILL(0x3ffe, 1, 0xf4)  // fix csum
	ROM_FILL(0x3fff, 1, 0x3d)

	// gfx card (scn2674 with 8741), to be moved
	ROM_REGION(0x400, "graphics", 0)
	ROM_LOAD("s36361-d321-v1.bin", 0x000, 0x400, CRC(69baeb2a) SHA1(98b9cd0f38c51b4988a3aed0efcf004bedd115ff))
ROM_END


//**************************************************************************
//  GAME DRIVERS
//**************************************************************************

COMP( 1984, pcd, 0, 0, pcd, 0, driver_device, 0, "Siemens", "PC-D", GAME_NOT_WORKING )