summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/cgenie.c
blob: 15ae711bc7bba321bef93fc641a924e2095526c8 (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
/***************************************************************************
HAD to change the PORT_ANALOG defs in this file...  please check ;-)

Colour Genie memory map

CPU #1:
0000-3fff ROM basic & bios        R   D0-D7

4000-bfff RAM
c000-dfff ROM dos                 R   D0-D7
e000-efff ROM extra               R   D0-D7
f000-f3ff color ram               W/R D0-D3
f400-f7ff font ram                W/R D0-D7
f800-f8ff keyboard matrix         R   D0-D7
ffe0-ffe3 floppy motor            W   D0-D2
          floppy head select      W   D3
ffec-ffef FDC WD179x              R/W D0-D7
          ffec command            W
          ffec status             R
          ffed track              R/W
          ffee sector             R/W
          ffef data               R/W

Interrupts:
IRQ mode 1
NMI
***************************************************************************/

#include "emu.h"
#include "cpu/z80/z80.h"
#include "includes/cgenie.h"
#include "imagedev/flopdrv.h"
#include "formats/basicdsk.h"
#include "imagedev/cartslot.h"
#include "imagedev/cassette.h"
#include "sound/ay8910.h"
#include "sound/dac.h"
#include "formats/cgen_cas.h"
#include "machine/ram.h"

static ADDRESS_MAP_START (cgenie_mem, AS_PROGRAM, 8, cgenie_state )
	AM_RANGE(0x0000, 0x3fff) AM_ROM
//  AM_RANGE(0x4000, 0xbfff) AM_RAM // set up in MACHINE_START
//  AM_RANGE(0xc000, 0xdfff) AM_ROM // installed in cgenie_init_machine
//  AM_RANGE(0xe000, 0xefff) AM_ROM // installed in cgenie_init_machine
	AM_RANGE(0xf000, 0xf3ff) AM_READWRITE(cgenie_colorram_r, cgenie_colorram_w ) AM_SHARE("colorram")
	AM_RANGE(0xf400, 0xf7ff) AM_READWRITE(cgenie_fontram_r, cgenie_fontram_w) AM_SHARE("fontram")
	AM_RANGE(0xf800, 0xf8ff) AM_READ(cgenie_keyboard_r )
	AM_RANGE(0xf900, 0xffdf) AM_NOP
	AM_RANGE(0xffe0, 0xffe3) AM_READWRITE(cgenie_irq_status_r, cgenie_motor_w )
	AM_RANGE(0xffe4, 0xffeb) AM_NOP
	AM_RANGE(0xffec, 0xffec) AM_READWRITE(cgenie_status_r, cgenie_command_w )
	AM_RANGE(0xffe4, 0xffeb) AM_NOP
	AM_RANGE(0xffec, 0xffec) AM_WRITE(cgenie_command_w )
	AM_RANGE(0xffed, 0xffed) AM_READWRITE(cgenie_track_r, cgenie_track_w )
	AM_RANGE(0xffee, 0xffee) AM_READWRITE(cgenie_sector_r, cgenie_sector_w )
	AM_RANGE(0xffef, 0xffef) AM_READWRITE(cgenie_data_r, cgenie_data_w )
	AM_RANGE(0xfff0, 0xffff) AM_NOP
ADDRESS_MAP_END

static ADDRESS_MAP_START (cgenie_io, AS_IO, 8, cgenie_state )
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0xf8, 0xf8) AM_READWRITE(cgenie_sh_control_port_r, cgenie_sh_control_port_w )
	AM_RANGE(0xf9, 0xf9) AM_DEVREADWRITE("ay8910", ay8910_device, data_r, data_w)
	AM_RANGE(0xfa, 0xfa) AM_READWRITE(cgenie_index_r, cgenie_index_w )
	AM_RANGE(0xfb, 0xfb) AM_READWRITE(cgenie_register_r, cgenie_register_w )
	AM_RANGE(0xff, 0xff) AM_READWRITE(cgenie_port_ff_r, cgenie_port_ff_w )
ADDRESS_MAP_END

static INPUT_PORTS_START( cgenie )
	PORT_START("DSW0")
	PORT_DIPNAME( 0x80, 0x80, "Floppy Disc Drives")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, "CG-DOS ROM C000-DFFF")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x00, "Extension  E000-EFFF")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, "Video Display accuracy") PORT_CODE(KEYCODE_F5) PORT_TOGGLE
	PORT_DIPSETTING(    0x10, "TV set" )
	PORT_DIPSETTING(    0x00, "RGB monitor" )
	PORT_BIT(0x0f, 0x0f, IPT_UNUSED)

/**************************************************************************
   +-------------------------------+     +-------------------------------+
   | 0   1   2   3   4   5   6   7 |     | 0   1   2   3   4   5   6   7 |
+--+---+---+---+---+---+---+---+---+  +--+---+---+---+---+---+---+---+---+
|0 | @ | A | B | C | D | E | F | G |  |0 | ` | a | b | c | d | e | f | g |
|  +---+---+---+---+---+---+---+---+  |  +---+---+---+---+---+---+---+---+
|1 | H | I | J | K | L | M | N | O |  |1 | h | i | j | k | l | m | n | o |
|  +---+---+---+---+---+---+---+---+  |  +---+---+---+---+---+---+---+---+
|2 | P | Q | R | S | T | U | V | W |  |2 | p | q | r | s | t | u | v | w |
|  +---+---+---+---+---+---+---+---+  |  +---+---+---+---+---+---+---+---+
|3 | X | Y | Z | [ |F-1|F-2|F-3|F-4|  |3 | x | y | z | { |F-5|F-6|F-7|F-8|
|  +---+---+---+---+---+---+---+---+  |  +---+---+---+---+---+---+---+---+
|4 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |  |4 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|  +---+---+---+---+---+---+---+---+  |  +---+---+---+---+---+---+---+---+
|5 | 8 | 9 | : | ; | , | - | . | / |  |5 | 8 | 9 | * | + | < | = | > | ? |
|  +---+---+---+---+---+---+---+---+  |  +---+---+---+---+---+---+---+---+
|6 |ENT|CLR|BRK|UP |DN |LFT|RGT|SPC|  |6 |ENT|CLR|BRK|UP |DN |LFT|RGT|SPC|
|  +---+---+---+---+---+---+---+---+  |  +---+---+---+---+---+---+---+---+
|7 |SHF|ALT|PUP|PDN|INS|DEL|CTL|END|  |7 |SHF|ALT|PUP|PDN|INS|DEL|CTL|END|
+--+---+---+---+---+---+---+---+---+  +--+---+---+---+---+---+---+---+---+
***************************************************************************/

	PORT_START("ROW0")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE)     PORT_CHAR('@') PORT_CHAR('`')
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_A)             PORT_CHAR('a') PORT_CHAR('A')
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_B)             PORT_CHAR('b') PORT_CHAR('B')
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_C)             PORT_CHAR('c') PORT_CHAR('C')
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_D)             PORT_CHAR('d') PORT_CHAR('D')
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_E)             PORT_CHAR('e') PORT_CHAR('E')
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_F)             PORT_CHAR('f') PORT_CHAR('F')
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_G)             PORT_CHAR('g') PORT_CHAR('G')

	PORT_START("ROW1")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_H)             PORT_CHAR('h') PORT_CHAR('H')
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_I)             PORT_CHAR('i') PORT_CHAR('I')
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_J)             PORT_CHAR('j') PORT_CHAR('J')
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_K)             PORT_CHAR('k') PORT_CHAR('K')
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_L)             PORT_CHAR('l') PORT_CHAR('L')
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_M)             PORT_CHAR('m') PORT_CHAR('M')
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_N)             PORT_CHAR('n') PORT_CHAR('N')
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_O)             PORT_CHAR('o') PORT_CHAR('O')

	PORT_START("ROW2")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_P)             PORT_CHAR('p') PORT_CHAR('P')
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q)             PORT_CHAR('q') PORT_CHAR('Q')
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_R)             PORT_CHAR('r') PORT_CHAR('R')
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_S)             PORT_CHAR('s') PORT_CHAR('S')
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_T)             PORT_CHAR('t') PORT_CHAR('T')
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_U)             PORT_CHAR('u') PORT_CHAR('U')
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_V)             PORT_CHAR('v') PORT_CHAR('V')
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_W)             PORT_CHAR('w') PORT_CHAR('W')

	PORT_START("ROW3")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_X)             PORT_CHAR('x') PORT_CHAR('X')
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y)             PORT_CHAR('y') PORT_CHAR('Y')
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z)             PORT_CHAR('z') PORT_CHAR('Z')
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("[  { (Not Connected)") PORT_CHAR('[') PORT_CHAR('{')
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_F1)            PORT_CHAR(UCHAR_MAMEKEY(F1)) PORT_CHAR(UCHAR_MAMEKEY(F5))
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_F2)            PORT_CHAR(UCHAR_MAMEKEY(F2)) PORT_CHAR(UCHAR_MAMEKEY(F6))
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_F3)            PORT_CHAR(UCHAR_MAMEKEY(F3)) PORT_CHAR(UCHAR_MAMEKEY(F7))
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_F4)            PORT_CHAR(UCHAR_MAMEKEY(F4)) PORT_CHAR(UCHAR_MAMEKEY(F8))

	PORT_START("ROW4")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_0)             PORT_CHAR('0')
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_1)             PORT_CHAR('1') PORT_CHAR('!')
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_2)             PORT_CHAR('2') PORT_CHAR('"')
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_3)             PORT_CHAR('3') PORT_CHAR('#')
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_4)             PORT_CHAR('4') PORT_CHAR('$')
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_5)             PORT_CHAR('5') PORT_CHAR('%')
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_6)             PORT_CHAR('6') PORT_CHAR('&')
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_7)             PORT_CHAR('7') PORT_CHAR('\'')

	PORT_START("ROW5")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_8)             PORT_CHAR('8') PORT_CHAR('(')
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_9)             PORT_CHAR('9') PORT_CHAR(')')
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS)         PORT_CHAR(':') PORT_CHAR('*')
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON)         PORT_CHAR(';') PORT_CHAR('+')
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA)         PORT_CHAR(',') PORT_CHAR('<')
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE)         PORT_CHAR('-') PORT_CHAR('=')
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP)          PORT_CHAR('.') PORT_CHAR('>')
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH)         PORT_CHAR('/') PORT_CHAR('?')

	PORT_START("ROW6")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER)         PORT_CHAR(13)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Clear") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(UCHAR_MAMEKEY(F10))
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Break") PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR(UCHAR_MAMEKEY(ESC))
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP)            PORT_CHAR(UCHAR_MAMEKEY(UP))
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN)          PORT_CHAR(UCHAR_MAMEKEY(DOWN))
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT)          PORT_CHAR(UCHAR_MAMEKEY(LEFT))
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT)         PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE)         PORT_CHAR(' ')

	/* 2008-05 FP: Below we still miss a 'Lock' key, two 'Rst' keys (used in pair, they should restart the
	system) and, I guess, two unused inputs (according to the user manual, there are no other keys on the
	keyboard)  */
	PORT_START("ROW7")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Mod Sel") PORT_CODE(KEYCODE_LALT)  PORT_CHAR(UCHAR_MAMEKEY(F9))
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Unknown 1")
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("Rpt") PORT_CODE(KEYCODE_PGDN) PORT_CHAR(UCHAR_MAMEKEY(F11))
		PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("Ctrl") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(F12))
		PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("Unknown 2")
		PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("Unknown 3")
		PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("Unknown 4")

	PORT_START("JOY0")
	PORT_BIT( 0xff, 0x60, IPT_AD_STICK_X) PORT_SENSITIVITY(40) PORT_KEYDELTA(0) PORT_MINMAX(0x00,0xcf ) PORT_PLAYER(1)

	PORT_START("JOY1")
	PORT_BIT( 0xff, 0x60, IPT_AD_STICK_Y) PORT_SENSITIVITY(40) PORT_KEYDELTA(0) PORT_MINMAX(0x00,0xcf ) PORT_PLAYER(1) PORT_REVERSE

	PORT_START("JOY2")
	PORT_BIT( 0xff, 0x60, IPT_AD_STICK_X) PORT_SENSITIVITY(40) PORT_KEYDELTA(0) PORT_MINMAX(0x00,0xcf ) PORT_PLAYER(2)

	PORT_START("JOY3")
	PORT_BIT( 0xff, 0x60, IPT_AD_STICK_Y) PORT_SENSITIVITY(40) PORT_KEYDELTA(0) PORT_MINMAX(0x00,0xcf ) PORT_PLAYER(2) PORT_REVERSE

	/* Joystick Keypad */
	/* keypads were organized a 3 x 4 matrix and it looked     */
	/* exactly like a our northern telephone numerical pads    */
	/* The addressing was done with a single clear bit 0..6    */
	/* on i/o port A,  while all other bits were set.          */
	/* (e.g. 0xFE addresses keypad1 row 0, 0xEF keypad2 row 1) */

	/*       bit  0   1   2   3   */
	/* FE/F7  0  [3] [6] [9] [#]  */
	/* FD/EF  1  [2] [5] [8] [0]  */
	/* FB/DF  2  [1] [4] [7] [*]  */

	/* 2008-05 FP: temporarily I mapped these as follows:
	    - Joy 1 at Keypad
	    - Joy 2 at a Joystick buttons
	A better mapping would be needed...
	*/

	PORT_START("KP0")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [3]") PORT_CODE(KEYCODE_3_PAD)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [6]") PORT_CODE(KEYCODE_6_PAD)
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [9]") PORT_CODE(KEYCODE_9_PAD)
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [#]") PORT_CODE(KEYCODE_SLASH_PAD)

	PORT_START("KP1")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [2]") PORT_CODE(KEYCODE_2_PAD)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [5]") PORT_CODE(KEYCODE_5_PAD)
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [8]") PORT_CODE(KEYCODE_8_PAD)
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [0]") PORT_CODE(KEYCODE_0_PAD)

	PORT_START("KP2")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [1]") PORT_CODE(KEYCODE_1_PAD)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [4]") PORT_CODE(KEYCODE_4_PAD)
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [7]") PORT_CODE(KEYCODE_7_PAD)
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 1 [*]") PORT_CODE(KEYCODE_ASTERISK)

	PORT_START("KP3")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [3]") PORT_CODE(JOYCODE_BUTTON2)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [6]") PORT_CODE(JOYCODE_BUTTON5)
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [9]")
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [#]") PORT_CODE(JOYCODE_BUTTON1)

	PORT_START("KP4")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [2]") PORT_CODE(JOYCODE_BUTTON2)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [5]") PORT_CODE(JOYCODE_BUTTON5)
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [8]")
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [0]")

	PORT_START("KP5")
		PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [1]") PORT_CODE(JOYCODE_BUTTON1)
		PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [4]") PORT_CODE(JOYCODE_BUTTON4)
		PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [7]")
		PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("Joy 2 [*]") PORT_CODE(JOYCODE_BUTTON1)
INPUT_PORTS_END

static const gfx_layout cgenie_charlayout =
{
	8,8,           /* 8*8 characters */
	384,           /* 256 fixed + 128 defineable characters */
	1,             /* 1 bits per pixel */
	{ 0 },         /* no bitplanes; 1 bit per pixel */
	{ 0, 1, 2, 3, 4, 5, 6, 7 },   /* x 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 const gfx_layout cgenie_gfxlayout =
{
	8,8,            /* 4*8 characters */
	256,            /* 256 graphics patterns */
	2,              /* 2 bits per pixel */
	{ 0, 1 },       /* two bitplanes; 2 bit per pixel */
	{ 0, 0, 2, 2, 4, 4, 6, 6}, /* x 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( cgenie )
	GFXDECODE_ENTRY( "gfx1", 0, cgenie_charlayout, 0, 3*16 )
	GFXDECODE_ENTRY( "gfx2", 0, cgenie_gfxlayout, 3*16*2, 3*4 )
GFXDECODE_END

static const unsigned char cgenie_colors[] = {
	0x00,0x00,0x00,  /* background   */
	0x5e,0x5e,0x5e,  /* gray         */
	0x11,0xff,0xea,  /* cyan         */
	0xff,0x00,0x5e,  /* red          */
	0xea,0xea,0xea,  /* white        */
	0xff,0xf9,0x00,  /* yellow       */
	0x6e,0xff,0x00,  /* green        */
	0xff,0x52,0x00,  /* orange       */
	0xea,0xff,0x00,  /* light yellow */
	0x02,0x48,0xff,  /* blue         */
	0x8e,0xd4,0xff,  /* light blue   */
	0xff,0x12,0xff,  /* pink         */
	0x88,0x43,0xff,  /* purple       */
	0x8c,0x8c,0x8c,  /* light gray   */
	0x00,0xfb,0x8c,  /* turquoise    */
	0xd2,0x00,0xff,  /* magenta      */
	0xff,0xff,0xff,  /* bright white */


#if 0
	0*4,  0*4,  0*4,  /* background   */

/* this is the 'RGB monitor' version, strong and clean */
	15*4, 15*4, 15*4,  /* gray         */
		0*4, 48*4, 48*4,  /* cyan         */
	60*4,  0*4,  0*4,  /* red          */
	47*4, 47*4, 47*4,  /* white        */
	55*4, 55*4,  0*4,  /* yellow       */
		0*4, 56*4,  0*4,  /* green        */
	42*4, 32*4,  0*4,  /* orange       */
	63*4, 63*4,  0*4,  /* light yellow */
		0*4,  0*4, 48*4,  /* blue         */
		0*4, 24*4, 63*4,  /* light blue   */
	60*4,  0*4, 38*4,  /* pink         */
	38*4,  0*4, 60*4,  /* purple       */
	31*4, 31*4, 31*4,  /* light gray   */
		0*4, 63*4, 63*4,  /* light cyan   */
	58*4,  0*4, 58*4,  /* magenta      */
	63*4, 63*4, 63*4,  /* bright white */
#endif

/* this is the 'TV screen' version, weak and blurred by repeating pixels */
	15*2+80, 15*2+80, 15*2+80,  /* gray         */
		0*2+80, 48*2+80, 48*2+80,   /* cyan         */
	60*2+80,  0*2+80,  0*2+80,  /* red          */
	47*2+80, 47*2+80, 47*2+80,  /* white        */
	55*2+80, 55*2+80,  0*2+80,  /* yellow       */
		0*2+80, 56*2+80,  0*2+80,   /* green        */
	42*2+80, 32*2+80,  0*2+80,  /* orange       */
	63*2+80, 63*2+80,  0*2+80,  /* light yellow */
		0*2+80,  0*2+80, 48*2+80,   /* blue         */
		0*2+80, 24*2+80, 63*2+80,   /* light blue   */
	60*2+80,  0*2+80, 38*2+80,  /* pink         */
	38*2+80,  0*2+80, 60*2+80,  /* purple       */
	31*2+80, 31*2+80, 31*2+80,  /* light gray   */
		0*2+80, 63*2+80, 63*2+80,   /* light cyan   */
	58*2+80,  0*2+80, 58*2+80,  /* magenta      */
	63*2+80, 63*2+80, 63*2+80,  /* bright white */

	15*2+96, 15*2+96, 15*2+96,  /* gray         */
		0*2+96, 48*2+96, 48*2+96,   /* cyan         */
	60*2+96,  0*2+96,  0*2+96,  /* red          */
	47*2+96, 47*2+96, 47*2+96,  /* white        */
	55*2+96, 55*2+96,  0*2+96,  /* yellow       */
		0*2+96, 56*2+96,  0*2+96,   /* green        */
	42*2+96, 32*2+96,  0*2+96,  /* orange       */
	63*2+96, 63*2+96,  0*2+96,  /* light yellow */
		0*2+96,  0*2+96, 48*2+96,   /* blue         */
		0*2+96, 24*2+96, 63*2+96,   /* light blue   */
	60*2+96,  0*2+96, 38*2+96,  /* pink         */
	38*2+96,  0*2+96, 60*2+96,  /* purple       */
	31*2+96, 31*2+96, 31*2+96,  /* light gray   */
		0*2+96, 63*2+96, 63*2+96,   /* light cyan   */
	58*2+96,  0*2+96, 58*2+96,  /* magenta      */
	63*2+96, 63*2+96, 63*2+96,  /* bright white */


};

static const unsigned char cgenienz_colors[] = {
	0x00,0x00,0x00,  /* background   */
	0xff,0xff,0xff,  /* gray         */
	0x12,0xff,0xff,  /* cyan         */
	0xff,0x6f,0xff,  /* red          */
	0x31,0x77,0xff,  /* white        */
	0xff,0xcb,0x00,  /* yellow       */
	0x6e,0xff,0x00,  /* green        */
	0xff,0x52,0x00,  /* orange       */
	0x5e,0x5e,0x5e,  /* light yellow */
	0xea,0xea,0xea,  /* blue         */
	0x00,0xff,0xdd,  /* light blue   */
	0xd2,0x00,0xff,  /* pink         */
	0x02,0x48,0xff,  /* purple       */
	0xff,0xf9,0x00,  /* light gray   */
	0x00,0xda,0x00,  /* light cyan   */
	0xff,0x22,0x00,  /* magenta      */
	0x00,0x00,0x00,  /* bright white */


/* this is the 'TV screen' version, weak and blurred by repeating pixels */
	15*2+80, 15*2+80, 15*2+80,  /* gray         */
		0*2+80, 48*2+80, 48*2+80,   /* cyan         */
	60*2+80,  0*2+80,  0*2+80,  /* red          */
	47*2+80, 47*2+80, 47*2+80,  /* white        */
	55*2+80, 55*2+80,  0*2+80,  /* yellow       */
		0*2+80, 56*2+80,  0*2+80,   /* green        */
	42*2+80, 32*2+80,  0*2+80,  /* orange       */
	63*2+80, 63*2+80,  0*2+80,  /* light yellow */
		0*2+80,  0*2+80, 48*2+80,   /* blue         */
		0*2+80, 24*2+80, 63*2+80,   /* light blue   */
	60*2+80,  0*2+80, 38*2+80,  /* pink         */
	38*2+80,  0*2+80, 60*2+80,  /* purple       */
	31*2+80, 31*2+80, 31*2+80,  /* light gray   */
		0*2+80, 63*2+80, 63*2+80,   /* light cyan   */
	58*2+80,  0*2+80, 58*2+80,  /* magenta      */
	63*2+80, 63*2+80, 63*2+80,  /* bright white */

	15*2+96, 15*2+96, 15*2+96,  /* gray         */
		0*2+96, 48*2+96, 48*2+96,   /* cyan         */
	60*2+96,  0*2+96,  0*2+96,  /* red          */
	47*2+96, 47*2+96, 47*2+96,  /* white        */
	55*2+96, 55*2+96,  0*2+96,  /* yellow       */
		0*2+96, 56*2+96,  0*2+96,   /* green        */
	42*2+96, 32*2+96,  0*2+96,  /* orange       */
	63*2+96, 63*2+96,  0*2+96,  /* light yellow */
		0*2+96,  0*2+96, 48*2+96,   /* blue         */
		0*2+96, 24*2+96, 63*2+96,   /* light blue   */
	60*2+96,  0*2+96, 38*2+96,  /* pink         */
	38*2+96,  0*2+96, 60*2+96,  /* purple       */
	31*2+96, 31*2+96, 31*2+96,  /* light gray   */
		0*2+96, 63*2+96, 63*2+96,   /* light cyan   */
	58*2+96,  0*2+96, 58*2+96,  /* magenta      */
	63*2+96, 63*2+96, 63*2+96,  /* bright white */


};

static const unsigned short cgenie_palette[] =
{
	0, 1, 0, 2, 0, 3, 0, 4, /* RGB monitor set of text colors */
	0, 5, 0, 6, 0, 7, 0, 8,
	0, 9, 0,10, 0,11, 0,12,
	0,13, 0,14, 0,15, 0,16,

	0,17, 0,18, 0,19, 0,20, /* TV set text colors: darker */
	0,21, 0,22, 0,23, 0,24,
	0,25, 0,26, 0,27, 0,28,
	0,29, 0,30, 0,31, 0,32,

	0,33, 0,34, 0,35, 0,36, /* TV set text colors: a bit brighter */
	0,37, 0,38, 0,39, 0,40,
	0,41, 0,42, 0,43, 0,44,
	0,45, 0,46, 0,47, 0,48,

	0,    9,    7,    6,    /* RGB monitor graphics colors */
	0,    25,   23,   22,   /* TV set graphics colors: darker */
	0,    41,   39,   38,   /* TV set graphics colors: a bit brighter */
};

/* Initialise the palette */
PALETTE_INIT_MEMBER(cgenie_state,cgenie)
{
	UINT8 i, r, g, b;

	machine().colortable = colortable_alloc(machine(), 49);

	for ( i = 0; i < 49; i++ )
	{
		r = cgenie_colors[i*3]; g = cgenie_colors[i*3+1]; b = cgenie_colors[i*3+2];
		colortable_palette_set_color(machine().colortable, i, rgb_t(r, g, b));
	}

	for(i=0; i<108; i++)
		colortable_entry_set_value(machine().colortable, i, cgenie_palette[i]);
}

PALETTE_INIT_MEMBER(cgenie_state,cgenienz)
{
	UINT8 i, r, g, b;

	machine().colortable = colortable_alloc(machine(), 49);

	for ( i = 0; i < 49; i++ )
	{
		r = cgenienz_colors[i*3]; g = cgenienz_colors[i*3+1]; b = cgenienz_colors[i*3+2];
		colortable_palette_set_color(machine().colortable, i, rgb_t(r, g, b));
	}

	for(i=0; i<108; i++)
		colortable_entry_set_value(machine().colortable, i, cgenie_palette[i]);
}

static const ay8910_interface cgenie_ay8910_interface =
{
	AY8910_LEGACY_OUTPUT,
	AY8910_DEFAULT_LOADS,
	DEVCB_DRIVER_MEMBER(cgenie_state, cgenie_psg_port_a_r),
	DEVCB_DRIVER_MEMBER(cgenie_state, cgenie_psg_port_b_r),
	DEVCB_DRIVER_MEMBER(cgenie_state, cgenie_psg_port_a_w),
	DEVCB_DRIVER_MEMBER(cgenie_state, cgenie_psg_port_b_w)
};


static const cassette_interface cgenie_cassette_interface =
{
	cgenie_cassette_formats,
	NULL,
	(cassette_state)(CASSETTE_STOPPED),
	NULL,
	NULL
};

// This is currently broken
static LEGACY_FLOPPY_OPTIONS_START(cgenie )
	LEGACY_FLOPPY_OPTION( cgd, "cgd", "Colour Genie disk image", basicdsk_identify_default, basicdsk_construct_default, NULL,
		HEADS([2])
		TRACKS([40])
		SECTORS([10])
		SECTOR_LENGTH([256])
		FIRST_SECTOR_ID([1]))
LEGACY_FLOPPY_OPTIONS_END

static const floppy_interface cgenie_floppy_interface =
{
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	FLOPPY_STANDARD_5_25_DSHD,
	LEGACY_FLOPPY_OPTIONS_NAME(cgenie),
	NULL,
	NULL
};

static MACHINE_CONFIG_START( cgenie_common, cgenie_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, XTAL_17_73447MHz/8)        /* 2,2168 MHz */
	MCFG_CPU_PROGRAM_MAP(cgenie_mem)
	MCFG_CPU_IO_MAP(cgenie_io)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", cgenie_state,  cgenie_frame_interrupt)
	MCFG_CPU_PERIODIC_INT_DRIVER(cgenie_state, cgenie_timer_interrupt,  40)
	MCFG_QUANTUM_TIME(attotime::from_hz(240))


	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(50)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
	MCFG_SCREEN_SIZE(48*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 48*8-1,0*8,32*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(cgenie_state, screen_update_cgenie)

	MCFG_GFXDECODE_ADD("gfxdecode",  cgenie )
	MCFG_PALETTE_LENGTH(108)

	// Actually the video is driven by an HD46505 clocked at XTAL_17_73447MHz/16

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("dac", DAC, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
	MCFG_SOUND_ADD("ay8910", AY8910, XTAL_17_73447MHz/8)
	MCFG_SOUND_CONFIG(cgenie_ay8910_interface)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.75)

	MCFG_CASSETTE_ADD( "cassette", cgenie_cassette_interface )

	MCFG_FD1793_ADD("wd179x", cgenie_wd17xx_interface ) // TODO confirm type

	MCFG_LEGACY_FLOPPY_4_DRIVES_ADD(cgenie_floppy_interface)
	/* cartridge */
	MCFG_CARTSLOT_ADD("cart")
	MCFG_CARTSLOT_EXTENSION_LIST("rom")
	MCFG_CARTSLOT_NOT_MANDATORY

	/* internal ram */
	MCFG_RAM_ADD(RAM_TAG)
	MCFG_RAM_DEFAULT_SIZE("16K")
	MCFG_RAM_EXTRA_OPTIONS("32K")
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( cgenie, cgenie_common )

	MCFG_PALETTE_INIT_OVERRIDE(cgenie_state, cgenie )
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( cgenienz, cgenie_common )

	MCFG_PALETTE_INIT_OVERRIDE(cgenie_state, cgenienz )
MACHINE_CONFIG_END

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

  Game driver(s)

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

ROM_START (cgenie)
	ROM_REGION(0x13000,"maincpu",0)
	ROM_LOAD ("cgenie.rom",  0x00000, 0x4000, CRC(d359ead7) SHA1(d8c2fc389ad38c45fba0ed556a7d91abac5463f4))
	ROM_LOAD ("cgdos.rom",   0x10000, 0x2000, CRC(2a96cf74) SHA1(6dcac110f87897e1ee7521aefbb3d77a14815893))
	ROM_CART_LOAD("cart", 0x12000, 0x1000, ROM_NOMIRROR | ROM_OPTIONAL)

	ROM_REGION(0x0c00,"gfx1",0)
	ROM_LOAD ("cgenie1.fnt", 0x0000, 0x0800, CRC(4fed774a) SHA1(d53df8212b521892cc56be690db0bb474627d2ff))

	/* Empty memory region for the character generator */
	ROM_REGION(0x0800,"gfx2",ROMREGION_ERASEFF)

ROM_END

ROM_START (cgenienz)
	ROM_REGION(0x13000,"maincpu",0)
	ROM_SYSTEM_BIOS(0, "old", "Old ROM")
	ROMX_LOAD( "cg-basic-rom-v1-pal-en.rom",   0x0000, 0x4000, CRC(844aaedd) SHA1(b7f984bc5cd979c7ad11ff909e8134f694aea7aa), ROM_BIOS(1) )
	ROM_SYSTEM_BIOS(1, "new", "New ROM")
	ROMX_LOAD( "cgromv2.rom",   0x0000, 0x4000, CRC(cfb84e09) SHA1(e199e4429bab6f9fca2bb05e71324538928a693a), ROM_BIOS(2) )
	ROM_LOAD ("cgdos.rom",   0x10000, 0x2000, CRC(2a96cf74) SHA1(6dcac110f87897e1ee7521aefbb3d77a14815893))
	ROM_CART_LOAD("cart", 0x12000, 0x1000, ROM_NOMIRROR | ROM_OPTIONAL)

	ROM_REGION(0x0c00,"gfx1",0)
	ROM_LOAD ("cgenie1.fnt", 0x0000, 0x0800, CRC(4fed774a) SHA1(d53df8212b521892cc56be690db0bb474627d2ff))

	/* Empty memory region for the character generator */
	ROM_REGION(0x0800,"gfx2",ROMREGION_ERASEFF)

ROM_END

// Code below is previous non-working implementation , just for reference
#if 0

#define CGENIE_DRIVE_INFO



//
//   abbreviations used:
//   GPL    Granules Per Lump
//   GAT    Granule Allocation Table
//   GATL GAT Length
//   GATM GAT Mask
//   DDGA Disk Directory Granule Allocation
struct PDRIVE
{
	UINT8 DDSL;      // Disk Directory Start Lump (lump number of GAT)
	UINT8 GATL;      // # of bytes used in the Granule Allocation Table sector
	UINT8 STEPRATE;  // step rate and somet SD/DD flag ...
	UINT8 TRK;       // number of tracks
	UINT8 SPT;       // sectors per track (both heads counted!)
	UINT8 GATM;      // number of used bits per byte in the GAT sector (GAT mask)
	UINT8 P7;        // ???? always zero
	UINT8 FLAGS;     // ???? some flags (SS/DS bit 6)
	UINT8 GPL;       // Sectors per granule (always 5 for the Colour Genie)
	UINT8 DDGA;      // Disk Directory Granule allocation (number of driectory granules)
};

static const PDRIVE pd_list[12] = {
	{0x14, 0x28, 0x07, 0x28, 0x0A, 0x02, 0x00, 0x00, 0x05, 0x02}, // CMD"<0=A" 40 tracks, SS, SD
	{0x14, 0x28, 0x07, 0x28, 0x14, 0x04, 0x00, 0x40, 0x05, 0x04}, // CMD"<0=B" 40 tracks, DS, SD
	{0x18, 0x30, 0x53, 0x28, 0x12, 0x03, 0x00, 0x03, 0x05, 0x03}, // CMD"<0=C" 40 tracks, SS, DD
	{0x18, 0x30, 0x53, 0x28, 0x24, 0x06, 0x00, 0x43, 0x05, 0x06}, // CMD"<0=D" 40 tracks, DS, DD
	{0x14, 0x28, 0x07, 0x28, 0x0A, 0x02, 0x00, 0x04, 0x05, 0x02}, // CMD"<0=E" 40 tracks, SS, SD
	{0x14, 0x28, 0x07, 0x28, 0x14, 0x04, 0x00, 0x44, 0x05, 0x04}, // CMD"<0=F" 40 tracks, DS, SD
	{0x18, 0x30, 0x53, 0x28, 0x12, 0x03, 0x00, 0x07, 0x05, 0x03}, // CMD"<0=G" 40 tracks, SS, DD
	{0x18, 0x30, 0x53, 0x28, 0x24, 0x06, 0x00, 0x47, 0x05, 0x06}, // CMD"<0=H" 40 tracks, DS, DD
	{0x28, 0x50, 0x07, 0x50, 0x0A, 0x02, 0x00, 0x00, 0x05, 0x02}, // CMD"<0=I" 80 tracks, SS, SD
	{0x28, 0x50, 0x07, 0x50, 0x14, 0x04, 0x00, 0x40, 0x05, 0x04}, // CMD"<0=J" 80 tracks, DS, SD
	{0x30, 0x60, 0x53, 0x50, 0x12, 0x03, 0x00, 0x03, 0x05, 0x03}, // CMD"<0=K" 80 tracks, SS, DD
	{0x30, 0x60, 0x53, 0x50, 0x24, 0x06, 0x00, 0x43, 0x05, 0x06}, // CMD"<0=L" 80 tracks, DS, DD
};

// basic-dsk is a disk image format which has the tracks and sectors
// stored in order, no information is stored which details the number
// of tracks, number of sides, number of sectors etc, so we need to
// set that up here
//
DEVICE_IMAGE_LOAD( cgenie_floppy )
{
	int i, j, dir_offset;
	UINT8 buff[16];
	UINT8 tracks = 0;
	UINT8 heads = 0;
	UINT8 spt = 0;
	short dir_sector = 0;
	short dir_length = 0;

	// A Floppy Isnt manditory, so return if none
	if (device_load_basicdsk_floppy(image) != IMAGE_INIT_PASS)
		return IMAGE_INIT_FAIL;

	// determine image geometry
	image.fseek(0, SEEK_SET);

	// determine geometry from disk contents
	for( i = 0; i < 12; i++ )
	{
		image.fseek(pd_list[i].SPT * 256, SEEK_SET);
		image.fread( buff, 16);
		// find an entry with matching DDSL
		if (buff[0] != 0x00 || buff[1] != 0xfe || buff[2] != pd_list[i].DDSL)
			continue;
		logerror("cgenie: checking format #%d\n", i);

		dir_sector = pd_list[i].DDSL * pd_list[i].GATM * pd_list[i].GPL + pd_list[i].SPT;
		dir_length = pd_list[i].DDGA * pd_list[i].GPL;

		// scan directory for DIR/SYS or NCW1983/JHL files
		// look into sector 2 and 3 first entry relative to DDSL
		for( j = 16; j < 32; j += 8 )
		{
			dir_offset = dir_sector * 256 + j * 32;
			if( image.fseek(dir_offset, SEEK_SET) < 0 )
				break;
			if( image.fread( buff, 16) != 16 )
				break;
			if( !strncmp((char*)buff + 5, "DIR     SYS", 11) ||
				!strncmp((char*)buff + 5, "NCW1983 JHL", 11) )
			{
				tracks = pd_list[i].TRK;
				heads = (pd_list[i].SPT > 18) ? 2 : 1;
				spt = pd_list[i].SPT / heads;
				dir_sector = pd_list[i].DDSL * pd_list[i].GATM * pd_list[i].GPL + pd_list[i].SPT;
				dir_length = pd_list[i].DDGA * pd_list[i].GPL;
				memcpy(memregion("maincpu")->base() + 0x5A71 + floppy_get_drive(image) * sizeof(PDRIVE), &pd_list[i], sizeof(PDRIVE));
				break;
			}
		}

		logerror("cgenie: geometry %d tracks, %d heads, %d sec/track\n", tracks, heads, spt);
		// set geometry so disk image can be read
		basicdsk_set_geometry(image, tracks, heads, spt, 256, 0, 0, FALSE);

		logerror("cgenie: directory sectors %d - %d (%d sectors)\n", dir_sector, dir_sector + dir_length - 1, dir_length);
		// mark directory sectors with deleted data address mark
		// assumption dir_sector is a sector offset
		for (j = 0; j < dir_length; j++)
		{
			UINT8 track;
			UINT8 side;
			UINT8 sector_id;
			UINT16 track_offset;
			UINT16 sector_offset;

			// calc sector offset
			sector_offset = dir_sector + j;

			// get track offset
			track_offset = sector_offset / spt;

			// calc track
			track = track_offset / heads;

			// calc side
			side = track_offset % heads;

			// calc sector id - first sector id is 0!
			sector_id = sector_offset % spt;

			// set deleted data address mark for sector specified
			basicdsk_set_ddam(image, track, side, sector_id, 1);
		}

	}
	return IMAGE_INIT_PASS;
}
#endif

/*    YEAR  NAME      PARENT    COMPAT  MACHINE   INPUT     INIT     COMPANY    FULLNAME */
COMP( 1982, cgenie,   0,        0,      cgenie,   cgenie, driver_device,    0,       "EACA Computers Ltd",  "Colour Genie EG2000" , 0)
COMP( 1982, cgenienz, cgenie,   0,      cgenienz, cgenie, driver_device,    0,       "EACA Computers Ltd",  "Colour Genie EG2000 (New Zealand)" , 0)