summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/ep64.cpp
blob: a5c271c68330f920d662b70587451005472b00ec (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
// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************

    Enterprise Sixty Four / One Two Eight emulation

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

/*

Enterprise Sixty Four / Enterprise One Two Eight
Enterprise Computers Ltd. 1985

MAIN PCB Layout
---------------
                                        DUAL
|-----------| 9V                        TAPE_IN/OUT                             RES
|HEATSINK   | DC_IN             MON1    AND REMOTE     SR1    PR1   CN2A CN1A   |-|
|           |--||---|--||--|--| |--| |-||-||-||-||-| |----| |-----| |--| |--| |-|-|------|
|-----------|7805   | MOD  |  |-|  |-|             |-|    |-|     |-|  |-|  |-|   EXP2 --|EXTERNAL
        |---+7805   |      |                         74LS06 74LS273 74LS86 74LS32      --|EXPANSION
        |   |       |------|             74LS244                                       --|CONNECTOR
        |   |78L12 POT1  LM386                               |-----|   |-----|   EXP1  --|
   CART |   |          LM1889 LM1886                   74LS04|NICK |   |DAVE |         --|
   CONN |   |   KEYB_8     POT2     KEYB_10                  |     |   |     |         --|
        |   |            4.433619MHz     74LS145 POT3 LED    |-----|   |-----|         --|
        |---+                                                                          --|
            |                            74LS74      74LS244  74LS244  74LS245 |---------|
            |                                                                  |
            | 74LS373                    4164  4164  74F157                    |
            |                                                                  |
            | 16-2-103   LM339    LM324  4164  4164  74F157           EXOS.IC2 |
            |                                                 8MHz             |
            | 74LS373                    4164  4164                            |
            |                                                74LS04    Z80A    |
            | 74LS273                    4164  4164                            |
            |------------------------------------------------------------------|
Notes: (all IC's shown)
           Z80A - Z80A CPU, clock input 4MHz [8/2]
       EXOS.IC2 - 32k x8-bit mask ROM usually 23256 manufactured by GI (DIP24). Contains EXOS operating
                  system and built-in word processor software. A few official revisions were made and
                  there were a few unofficial revision made with additional capabilities and bug-fixes
                  ROM labelling of some official versions found....
                  9256DS-0019 (C)1984 INTELLIGENT SOFTWARE LTD ENTER 08-45-A GI
                  9256DS-0036 (C)1984 INTELLIGENT SOFTWARE LTD ENTER 05-23-A GI
           4164 - 64k x1-bit Dynamic RAM with Page Mode (DIP16)
           NICK - Custom graphics chip (QFP72)
           DAVE - Custom sound chip (QFP72)
          LM386 - National Semiconductor LM386 Low Voltage Audio Power Amplifier (DIP8)
         LM1889 - National Semiconductor LM1889 TV Video Modulator (DIP18)
         LM1886 - National Semiconductor LM1886 TV Video Matrix DAC (DIP20)
          LM339 - SGS LM339 Low Power Low Offset Voltage Quad Comparator (DIP8)
          LM324 - SGS LM324 Quad Operational Amplifier (DIP8)
         74LS04 - Hex Inverter (DIP14)
         74LS06 - Hex Inverter/Buffer with Open-Collector Outputs (DIP14)
         74LS32 - Quad 2-Input Positive OR Gate (DIP14)
         74LS74 - Dual Positive-Edge-Triggered D Flip-Flops with Preset, Clear and Complementary Outputs (DIP14)
         74LS86 - Quad 2-Input Exclusive OR Gate (DIP14)
        74LS145 - BCD to Deccimal Decoder/Driver (DIP16)
         74F157 - Quad 2-Line to 1-Line Data Selector/Multiplexer (DIP16). Early rev mainboards use 74LS158 instead
        74LS244 - Octal 3-State Noninverting Buffer/Line Driver/Line Receiver (DIP20)
        74LS245 - Octal Bus Tranceiver with Tri-State Outputs (DIP20)
        74LS273 - Octal D-Type Flip-Flop With Clear (DIP20)
        74LS373 - Octal D-Type Transparent Latches and Edge-Triggered Flip-Flops (DIP20)
           7805 - Voltage regulator. +9V DC input from DC power pack, +5V DC output
          78L12 - Voltage regulator. Voltage input via small transformer on PCB. +12V DC output
           POT1 - Potentiometer located near modulator and video output circuitry
           POT2 - Potentiometer located near video output circuitry. Probably used to fine-tune the video clock
           POT3 - Potentiometer. Possibly for video/NICK-related adjustments
            LED - LED to show +5V is present
       16-2-103 - Resistor Array (DIP16)
         KEYB_8 - 8 pin keyboard connector
        KEYB_10 - 10 pin keyboard connector
           EXP1 - 28 pin internal expansion connector (solder holes only) used for internal 64k memory expansion card
           EXP2 - 10 pin internal expansion connector (solder holes only) used for internal 64k memory expansion card
            MOD - Astec UM1233 TV modulator
            RES - Reset push button switch
           MON1 - Monitor output connector. Pinout is....

                            Green  A1 B1 NC
                            Ground A2 B2 Ground
                  Mono Comp. Video A3 B3 Blue
                             HSync A4 B4 Red
                             VSync A5 B5 Composite Sync
                                NC A6 B6 Mode Switch
                        Left Audio A7 B7 Right Audio

            SR1 - Serial/Network connector. Pinout is....

                         Reference A1 B1 Ground
                                 - A2 B2 -
                               RTS A3 B3 Data Out
                               CTS A4 B4 Data In

            PR1 - Printer connector. Pinout is....

                            Ground A1 B1 Ground
                            Strobe A2 B2 Ready
                            Data 3 A3 B3 Data 4
                                 - A4 B4 -
                            Data 2 A5 B5 Data 5
                            Data 1 A6 B6 Data 6
                            Data 0 A7 B7 Data 7

           CN2A - Joystick 2 connector
           CN1A - Joystick 1 connector
                  Pinout is....

                          Keyboard J A1 B1 Ground
                          Keyboard L A2 B2 Keyboard K
                                   - A3 B3 -
                               Right A4 B4 +5V
                                Down A5 B5 Left
                                Fire A6 B6 Up


Internal Memory Expansion PCB Layout
------------------------------------

|---------------------|
|  4164 74LS00 PL3 PL2|
|4164 74LS30 74F157   |
|4164 4164            |
|4164 4164   74F157   |
|4164 4164 74LS32  PL1|
|---------------------|
Notes: (All IC's shown)
          PL1 - 28-pin connector (solder pads only) hard-wired to solder pads EXP1 on mainboard
      PL2/PL3 - 5-pin connectors (solder pads only) hard-wired to solder pads EXP2 on mainboard
         4164 - 64k x1-bit Dynamic RAM with Page Mode (DIP16)
       74LS00 - Quad 2-Input NAND Gate (DIP14)
       74LS30 - 8-input NAND Gate (DIP14)
       74LS32 - Quad 2-Input Positive OR Gate (DIP14)
       74F157 - Quad 2-Line to 1-Line Data Selector/Multiplexer (DIP16). Early rev memory boards use 74LS158 instead

*/

/*

    TODO:

    - POST RAM errors
    - rewrite DAVE to output to discrete DAC
    - rewrite NICK
    - cassette
    - external joysticks

    http://ep.homeserver.hu/Dokumentacio/Konyvek/

*/

#include "emu.h"

#include "bus/centronics/ctronics.h"
#include "bus/ep64/exp.h"
#include "bus/generic/carts.h"
#include "bus/generic/slot.h"
#include "bus/rs232/rs232.h"
#include "cpu/z80/z80.h"
#include "imagedev/cassette.h"
#include "machine/ram.h"
#include "sound/dave.h"
#include "video/nick.h"

#include "softlist.h"
#include "speaker.h"


#define Z80_TAG         "u1"
#define DAVE_TAG        "u3"
#define NICK_TAG        "u4"
#define CENTRONICS_TAG  "centronics"
#define RS232_TAG       "rs232"
#define CASSETTE1_TAG   "cassette1"
#define CASSETTE2_TAG   "cassette2"
#define SCREEN_TAG      "screen"
#define EP64_EXPANSION_BUS_TAG  "exp"

class ep64_state : public driver_device
{
public:
	ep64_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, Z80_TAG),
		m_dave(*this, DAVE_TAG),
		m_nick(*this, NICK_TAG),
		m_centronics(*this, CENTRONICS_TAG),
		m_rs232(*this, RS232_TAG),
		m_cassette1(*this, CASSETTE1_TAG),
		m_cassette2(*this, CASSETTE2_TAG),
		m_cart(*this, "cartslot"),
		m_exp(*this, EP64_EXPANSION_BUS_TAG),
		m_ram(*this, RAM_TAG),
		m_rom(*this, Z80_TAG),
		m_y(*this, "Y%u", 0)
	{ }

	void ep128(machine_config &config);
	void ep64(machine_config &config);

private:
	required_device<cpu_device> m_maincpu;
	required_device<dave_device> m_dave;
	required_device<nick_device> m_nick;
	required_device<centronics_device> m_centronics;
	required_device<rs232_port_device> m_rs232;
	required_device<cassette_image_device> m_cassette1;
	required_device<cassette_image_device> m_cassette2;
	required_device<generic_slot_device> m_cart;
	required_device<ep64_expansion_bus_slot_device> m_exp;
	required_device<ram_device> m_ram;
	required_memory_region m_rom;
	required_ioport_array<10> m_y;

	virtual void machine_start() override;
	virtual void machine_reset() override;

	DECLARE_READ8_MEMBER( rd0_r );
	DECLARE_WRITE8_MEMBER( wr0_w );
	DECLARE_READ8_MEMBER( rd1_r );
	DECLARE_WRITE8_MEMBER( wr2_w );

	uint8_t m_key;

	DECLARE_WRITE_LINE_MEMBER(write_centronics_busy);
	int m_centronics_busy;
	void dave_128k_mem(address_map &map);
	void dave_64k_mem(address_map &map);
	void dave_io(address_map &map);
	void ep64_io(address_map &map);
	void ep64_mem(address_map &map);
};



//**************************************************************************
//  READ/WRITE HANDLERS
//**************************************************************************

//-------------------------------------------------
//  rd0_r -
//-------------------------------------------------

READ8_MEMBER( ep64_state::rd0_r )
{
	uint8_t data = 0xff;

	if (m_key < 10)
	{
		data &= m_y[m_key]->read();
	}

	return data;
}


//-------------------------------------------------
//  rd0_r -
//-------------------------------------------------

WRITE8_MEMBER( ep64_state::wr0_w )
{
	/*

	    bit     description

	    0       KEY A
	    1       KEY B
	    2       KEY C
	    3       KEY D
	    4       PRINTER _STB
	    5       CASSETTE OUT
	    6       REMOTE 1
	    7       REMOTE 2

	*/

	// keyboard
	m_key = data & 0x0f;

	// printer
	m_centronics->write_strobe(!BIT(data, 4));

	// cassette
	m_cassette1->output(BIT(data, 5) ? -1.0 : +1.0);
	m_cassette2->output(BIT(data, 5) ? -1.0 : +1.0);

	// cassette
	m_cassette1->change_state(BIT(data, 6) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR);
	m_cassette2->change_state(BIT(data, 7) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR);
}

WRITE_LINE_MEMBER( ep64_state::write_centronics_busy )
{
	m_centronics_busy = state;
}

//-------------------------------------------------
//  rd1_r -
//-------------------------------------------------

READ8_MEMBER( ep64_state::rd1_r )
{
	/*

	    bit     description

	    0       KBJ
	    1       KBK
	    2       KBL
	    3       PRINTER _RDY
	    4       SERIAL/NET DATA IN
	    5       SERIAL/NET STATUS IN
	    6       CASSETTE IN
	    7       ?

	*/

	uint8_t data = 0;

	// printer
	data |= m_centronics_busy << 3;

	// serial
	data |= m_rs232->rxd_r() << 4;
	data |= m_rs232->cts_r() << 5;

	// cassette
	data |= ((m_cassette1->input() < 0) || (m_cassette2->input() < 0)) << 6;

	return data;
}


//-------------------------------------------------
//  wr2_w -
//-------------------------------------------------

WRITE8_MEMBER( ep64_state::wr2_w )
{
	/*

	    bit     description

	    0       SERIAL/NET DATA OUT
	    1       SERIAL/NET STATUS OUT
	    2
	    3
	    4
	    5
	    6
	    7

	*/

	// serial
	m_rs232->write_txd(!BIT(data, 0));
	m_rs232->write_rts(!BIT(data, 1));
}



//**************************************************************************
//  ADDRESS MAPS
//**************************************************************************

//-------------------------------------------------
//  ADDRESS_MAP( ep64_mem )
//-------------------------------------------------

void ep64_state::ep64_mem(address_map &map)
{
	map(0x0000, 0xffff).m(m_dave, FUNC(dave_device::z80_program_map));
}


//-------------------------------------------------
//  ADDRESS_MAP( ep64_io )
//-------------------------------------------------

void ep64_state::ep64_io(address_map &map)
{
	map(0x0000, 0xffff).m(m_dave, FUNC(dave_device::z80_io_map));
}


//-------------------------------------------------
//  ADDRESS_MAP( dave_64k_mem )
//-------------------------------------------------

void ep64_state::dave_64k_mem(address_map &map)
{
	map(0x000000, 0x007fff).rom().region(Z80_TAG, 0);
	//AM_RANGE(0x010000, 0x01ffff)      // mapped by the cartslot
	map(0x3f0000, 0x3fffff).m(m_nick, FUNC(nick_device::vram_map));
}


//-------------------------------------------------
//  ADDRESS_MAP( dave_128k_mem )
//-------------------------------------------------

void ep64_state::dave_128k_mem(address_map &map)
{
	dave_64k_mem(map);
	map(0x3e0000, 0x3effff).ram();
}


//-------------------------------------------------
//  ADDRESS_MAP( dave_io )
//-------------------------------------------------

void ep64_state::dave_io(address_map &map)
{
	map.global_mask(0xff);
	map(0x80, 0x8f).m(m_nick, FUNC(nick_device::vio_map));
	map(0xb5, 0xb5).rw(FUNC(ep64_state::rd0_r), FUNC(ep64_state::wr0_w));
	map(0xb6, 0xb6).r(FUNC(ep64_state::rd1_r)).w("cent_data_out", FUNC(output_latch_device::bus_w));
	map(0xb7, 0xb7).w(FUNC(ep64_state::wr2_w));
}



//**************************************************************************
//  INPUT PORTS
//**************************************************************************

//-------------------------------------------------
//  INPUT_PORTS( ep64 )
//-------------------------------------------------

static INPUT_PORTS_START( ep64 )
	PORT_START("Y0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('\\') PORT_CHAR('|')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Left SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)

	PORT_START("Y1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL)

	PORT_START("Y2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t')

	PORT_START("Y3")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("3 \xC2\xA3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR(0x00a3)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))

	PORT_START("Y4")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 4") PORT_CODE(KEYCODE_F4) PORT_CHAR(UCHAR_MAMEKEY(F4))
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 8") PORT_CODE(KEYCODE_F8) PORT_CHAR(UCHAR_MAMEKEY(F8))
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 3") PORT_CODE(KEYCODE_F3) PORT_CHAR(UCHAR_MAMEKEY(F3))
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 6") PORT_CODE(KEYCODE_F6) PORT_CHAR(UCHAR_MAMEKEY(F6))
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 5") PORT_CODE(KEYCODE_F5) PORT_CHAR(UCHAR_MAMEKEY(F5))
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 7") PORT_CODE(KEYCODE_F7) PORT_CHAR(UCHAR_MAMEKEY(F7))
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 2") PORT_CODE(KEYCODE_F2) PORT_CHAR(UCHAR_MAMEKEY(F2))
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNCTION 1") PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(F1))

	PORT_START("Y5")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('_')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('^') PORT_CHAR('~')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ERASE") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("Y6")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR(']') PORT_CHAR('}')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("Y7")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("STOP") PORT_CODE(KEYCODE_END)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("HOLD") PORT_CODE(KEYCODE_HOME)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ENTER") PORT_CODE(KEYCODE_ENTER) PORT_CHAR('\r')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ALT") PORT_CODE(KEYCODE_LALT) PORT_CHAR(UCHAR_MAMEKEY(LALT))

	PORT_START("Y8")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(DEL))
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Right SHIFT") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SPACE") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("INS") PORT_CODE(KEYCODE_INSERT) PORT_CHAR(UCHAR_MAMEKEY(INSERT))

	PORT_START("Y9")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('@') PORT_CHAR('`')
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('[') PORT_CHAR('{')
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END


//**************************************************************************
//  MACHINE INITIALIZATION
//**************************************************************************

//-------------------------------------------------
//  MACHINE_START( ep64 )
//-------------------------------------------------

void ep64_state::machine_start()
{
	if (m_cart->exists())
		m_dave->space(AS_PROGRAM).install_read_handler(0x010000, 0x01ffff, read8sm_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_cart));

	// state saving
	save_item(NAME(m_key));
	save_item(NAME(m_centronics_busy));
}


void ep64_state::machine_reset()
{
	m_dave->reset();
	m_nick->reset();

	address_space &program = m_maincpu->space(AS_PROGRAM);
	wr0_w(program, 0, 0);
	subdevice<output_latch_device>("cent_data_out")->write(0);
	wr2_w(program, 0, 0);
}



//**************************************************************************
//  MACHINE CONFIGURATION
//**************************************************************************

//-------------------------------------------------
//  machine_config( ep64 )
//-------------------------------------------------

void ep64_state::ep64(machine_config &config)
{
	// basic machine hardware
	Z80(config, m_maincpu, XTAL(8'000'000)/2);
	m_maincpu->set_addrmap(AS_PROGRAM, &ep64_state::ep64_mem);
	m_maincpu->set_addrmap(AS_IO, &ep64_state::ep64_io);

	// video hardware
	screen_device& screen(SCREEN(config, SCREEN_TAG, SCREEN_TYPE_RASTER));
	screen.set_refresh_hz(50);
	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500));
	screen.set_size(ENTERPRISE_SCREEN_WIDTH, ENTERPRISE_SCREEN_HEIGHT);
	screen.set_visarea(0, ENTERPRISE_SCREEN_WIDTH-1, 0, ENTERPRISE_SCREEN_HEIGHT-1);
	screen.set_screen_update(NICK_TAG, FUNC(nick_device::screen_update));

	NICK(config, m_nick, XTAL(8'000'000), SCREEN_TAG);
	m_nick->virq_wr_callback().set(m_dave, FUNC(dave_device::int1_w));

	// sound hardware
	SPEAKER(config, "lspeaker").front_left();
	SPEAKER(config, "rspeaker").front_right();
	DAVE(config, m_dave, XTAL(8'000'000));
	m_dave->set_addrmap(AS_PROGRAM, &ep64_state::dave_64k_mem);
	m_dave->set_addrmap(AS_IO, &ep64_state::dave_io);
	m_dave->irq_wr().set_inputline(Z80_TAG, INPUT_LINE_IRQ0);
	m_dave->add_route(0, "lspeaker", 0.25);
	m_dave->add_route(1, "rspeaker", 0.25);

	// devices
	EP64_EXPANSION_BUS_SLOT(config, m_exp, nullptr);
	m_exp->set_program_space(m_dave, AS_PROGRAM);
	m_exp->set_io_space(m_dave, AS_IO);
	m_exp->irq_wr().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
	m_exp->nmi_wr().set_inputline(m_maincpu, INPUT_LINE_NMI);
	m_exp->wait_wr().set_inputline(m_maincpu, Z80_INPUT_LINE_BOGUSWAIT);

	CENTRONICS(config, m_centronics, centronics_devices, "printer");
	m_centronics->busy_handler().set(FUNC(ep64_state::write_centronics_busy));
	output_latch_device &cent_data_out(OUTPUT_LATCH(config, "cent_data_out"));
	m_centronics->set_output_latch(cent_data_out);

	RS232_PORT(config, m_rs232, default_rs232_devices, nullptr);
	m_rs232->rxd_handler().set(m_dave, FUNC(dave_device::int2_w));

	CASSETTE(config, m_cassette1);
	m_cassette1->set_default_state((cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_MUTED));
	m_cassette1->set_interface("ep64_cass");

	CASSETTE(config, m_cassette2);
	m_cassette2->set_default_state((cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_MUTED));
	m_cassette2->set_interface("ep64_cass");

	// internal RAM
	RAM(config, m_ram).set_default_size("64K");

	// cartridge
	GENERIC_CARTSLOT(config, m_cart, generic_linear_slot, "ep64_cart", "bin,rom");

	// software lists
	SOFTWARE_LIST(config, "cart_list").set_original("ep64_cart");
	SOFTWARE_LIST(config, "cass_list").set_original("ep64_cass");
	SOFTWARE_LIST(config, "flop_list").set_original("ep64_flop");
}


//-------------------------------------------------
//  machine_config( ep128 )
//-------------------------------------------------

void ep64_state::ep128(machine_config &config)
{
	ep64(config);
	m_dave->set_addrmap(AS_PROGRAM, &ep64_state::dave_128k_mem);

	// internal RAM
	m_ram->set_default_size("128K");
}



//**************************************************************************
//  ROMS
//**************************************************************************

//-------------------------------------------------
//  ROM( ep64 )
//-------------------------------------------------

ROM_START( ep64 )
	ROM_REGION( 0x8000, Z80_TAG, 0 )
	ROM_LOAD( "9256ds-0038_enter05-23-a.u2", 0x0000, 0x8000, CRC(d421795f) SHA1(6033a0535136c40c47137e4d1cd9273c06d5fdff) )
ROM_END

#define rom_phc64   rom_ep64


//-------------------------------------------------
//  ROM( ep128 )
//-------------------------------------------------

ROM_START( ep128 )
	ROM_REGION( 0x8000, Z80_TAG, 0 )
	ROM_LOAD( "9256ds-0019_enter08-45-a.u2", 0x0000, 0x8000, CRC(982a3b44) SHA1(55315b20fecb4441a07ee4bc5dc7153f396e0a2e) )
ROM_END



//**************************************************************************
//  SYSTEM DRIVERS
//**************************************************************************

//    YEAR  NAME   PARENT  COMPAT  MACHINE  INPUT  CLASS       INIT        COMPANY                 FULLNAME                     FLAGS
COMP( 1985, ep64,  0,      0,      ep64,    ep64,  ep64_state, empty_init, "Enterprise Computers", "Enterprise Sixty Four",     MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND )
COMP( 1985, phc64, ep64,   0,      ep64,    ep64,  ep64_state, empty_init, "Hegener & Glaser",     "Mephisto PHC 64 (Germany)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND )
COMP( 1986, ep128, ep64,   0,      ep128,   ep64,  ep64_state, empty_init, "Enterprise Computers", "Enterprise One Two Eight",  MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND )