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
|
/*********************************************************************
mc6847.h
Implementation of Motorola 6847 video hardware chip
***************************************************************************/
#pragma once
#ifndef __MC6847__
#define __MC6847__
//**************************************************************************
// MC6847 CONFIGURATION / INTERFACE
//**************************************************************************
#define MCFG_MC6847_REMOVE(_tag) \
MCFG_DEVICE_REMOVE(_tag)
#define MCFG_MC6847_ADD(_tag, _variant, _clock, _config) \
MCFG_DEVICE_ADD(_tag, _variant, _clock) \
MCFG_DEVICE_CONFIG(_config)
#define MCFG_SCREEN_MC6847_NTSC_ADD(_tag, _mctag) \
MCFG_SCREEN_ADD(_tag, RASTER) \
MCFG_SCREEN_UPDATE_DEVICE(_mctag, mc6847_base_device, screen_update) \
MCFG_SCREEN_REFRESH_RATE(60) \
MCFG_SCREEN_SIZE(320, 243) \
MCFG_SCREEN_VISIBLE_AREA(0, 320-1, 1, 241-1) \
MCFG_SCREEN_VBLANK_TIME(0)
#define MCFG_SCREEN_MC6847_PAL_ADD(_tag, _mctag) \
MCFG_SCREEN_ADD(_tag, RASTER) \
MCFG_SCREEN_UPDATE_DEVICE(_mctag, mc6847_base_device, screen_update) \
MCFG_SCREEN_REFRESH_RATE(50) \
MCFG_SCREEN_SIZE(320, 243) \
MCFG_SCREEN_VISIBLE_AREA(0, 320-1, 1, 241-1) \
MCFG_SCREEN_VBLANK_TIME(0)
/* interface */
struct mc6847_interface
{
/* screen we are acting on */
const char *m_screen_tag;
/* if specified, this gets called whenever reading a byte (offs_t ~0 specifies DA* entering the tristate mode) */
devcb_read8 m_input_func;
/* if specified, this gets called for every change of the HS pin (pin 38) */
devcb_write_line m_out_hsync_func;
/* if specified, this gets called for every change of the FS pin (pin 37) */
devcb_write_line m_out_fsync_func;
/* mode control lines input */
devcb_read_line m_in_ag_func;
devcb_read_line m_in_gm2_func;
devcb_read_line m_in_gm1_func;
devcb_read_line m_in_gm0_func;
devcb_read_line m_in_css_func;
devcb_read_line m_in_as_func;
devcb_read_line m_in_intext_func;
devcb_read_line m_in_inv_func;
/* if specified, this reads the external char rom off of the driver state */
UINT8 (*m_get_char_rom)(running_machine &machine, UINT8 ch, int line);
/* if true, this is black and white */
bool m_black_and_white;
};
#define ARTIFACTING_TAG "artifacting"
INPUT_PORTS_EXTERN(mc6847_artifacting);
//**************************************************************************
// MC6847 CORE
//**************************************************************************
// base class so that the GIME emulation can access mc6847 stuff
class mc6847_friend_device : public device_t
{
public:
// inlines
bool hs_r(void) { return m_horizontal_sync; }
bool fs_r(void) { return m_field_sync; }
protected:
mc6847_friend_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock,
const UINT8 *fontdata, bool is_mc6847t1, double tpfs, int field_sync_falling_edge_scanline, bool supports_partial_body_scanlines, const char *shortname, const char *source);
// video mode constants
static const UINT8 MODE_AG = 0x80;
static const UINT8 MODE_GM2 = 0x40;
static const UINT8 MODE_GM1 = 0x20;
static const UINT8 MODE_GM0 = 0x10;
static const UINT8 MODE_CSS = 0x08;
static const UINT8 MODE_AS = 0x04;
static const UINT8 MODE_INTEXT = 0x02;
static const UINT8 MODE_INV = 0x01;
// timer constants
static const device_timer_id TIMER_FRAME = 0;
static const device_timer_id TIMER_HSYNC_OFF = 1;
static const device_timer_id TIMER_HSYNC_ON = 2;
static const device_timer_id TIMER_FSYNC = 3;
// fonts
static const UINT8 pal_round_fontdata8x12[];
static const UINT8 pal_square_fontdata8x12[];
static const UINT8 ntsc_round_fontdata8x12[];
static const UINT8 ntsc_square_fontdata8x12[];
static const UINT8 semigraphics4_fontdata8x12[];
static const UINT8 semigraphics6_fontdata8x12[];
static const UINT8 s68047_fontdata8x12[];
// pixel definitions
typedef UINT32 pixel_t;
pixel_t *bitmap_addr(bitmap_rgb32 &bitmap, int y, int x)
{
return &bitmap.pix32(y, x);
}
static UINT8 simplify_mode(UINT8 data, UINT8 mode)
{
// simplifies MC6847 modes to drop mode flags that are not significant
return mode & ~((mode & MODE_AG) ? (MODE_AS | MODE_INV) : 0);
}
// internal class that represents a MC6847 character map
class character_map
{
public:
// constructor that sets up the font data
character_map(const UINT8 *fontdata, bool is_mc6847t1);
// optimized template function that emits a single character
template<int xscale>
ATTR_FORCE_INLINE void emit_character(UINT8 mode, const UINT8 *data, int length, pixel_t *RESTRICT pixels, int y, const pixel_t *palette)
{
for (int i = 0; i < length; i++)
{
// get the character
UINT8 character = data[i];
// based on the mode, determine which entry to use
const entry *e = &m_entries[mode % (sizeof(m_entries) / sizeof(m_entries[0]))];
// identify the character in the font data
const UINT8 *font_character = e->m_fontdata + (character & e->m_character_mask) * 12;
// get the particular slice out
UINT8 font_character_slice = font_character[y % 12];
// get the two colors
UINT16 color_base_0 = e->m_color_base_0 + ((character >> e->m_color_shift_0) & e->m_color_mask_0);
UINT16 color_base_1 = e->m_color_base_1 + ((character >> e->m_color_shift_1) & e->m_color_mask_1);
pixel_t color_0 = palette[color_base_0];
pixel_t color_1 = palette[color_base_1];
// emit the bits
for (int j = 0; j < 8; j++)
{
for (int k = 0; k < xscale; k++)
{
pixels[(i * 8 + j) * xscale + k] = bit_test(font_character_slice, j, color_0, color_1);
}
}
}
};
private:
struct entry
{
const UINT8 *m_fontdata;
UINT8 m_character_mask;
UINT8 m_color_shift_0;
UINT8 m_color_shift_1;
UINT8 m_color_mask_0;
UINT8 m_color_mask_1;
UINT16 m_color_base_0;
UINT16 m_color_base_1;
};
// lookup table for MC6847 modes to determine font data and color
entry m_entries[128];
// text font data calculated on startup
UINT8 m_text_fontdata_inverse[64*12];
UINT8 m_text_fontdata_lower_case[64*12];
UINT8 m_text_fontdata_lower_case_inverse[64*12];
// optimized function that tests a single bit
ATTR_FORCE_INLINE pixel_t bit_test(UINT8 data, int shift, pixel_t color_0, pixel_t color_1)
{
return data & (0x80 >> shift) ? color_1 : color_0;
}
};
// artficater internal class
class artifacter
{
public:
artifacter();
// artifacting config
void setup_config(device_t *device);
void poll_config(void) { m_artifacting = (m_config!=NULL) ? m_config->read() : 0; }
// artifacting application
template<int xscale>
ATTR_FORCE_INLINE void process_artifacts(pixel_t *pixels, UINT8 mode, const pixel_t *palette)
{
if (((mode & (MODE_AG|MODE_GM2|MODE_GM1|MODE_GM0)) == (MODE_AG|MODE_GM2|MODE_GM1|MODE_GM0))
&& (m_artifacting != 0))
{
// identify the new colors and update
pixel_t c0 = palette[(mode & MODE_CSS) ? 10 : 8];
pixel_t c1 = palette[(mode & MODE_CSS) ? 11 : 9];
update_colors(c0, c1);
// generate the new line
pixel_t new_line[256];
int x, i;
for (x = 0; x < 256; x += 2)
{
UINT8 val = ((pixels[(x - 2) * xscale] == c1) ? 0x20 : 0x00)
| ((pixels[(x - 1) * xscale] == c1) ? 0x10 : 0x00)
| ((pixels[(x + 0) * xscale] == c1) ? 0x08 : 0x00)
| ((pixels[(x + 1) * xscale] == c1) ? 0x04 : 0x00)
| ((pixels[(x + 2) * xscale] == c1) ? 0x02 : 0x00)
| ((pixels[(x + 3) * xscale] == c1) ? 0x01 : 0x00);
new_line[x + 0] = m_expanded_colors[val * 2 + 0];
new_line[x + 1] = m_expanded_colors[val * 2 + 1];
}
// and copy it in
for (x = 0; x < 256; x++)
{
for (i = 0; i < xscale; i++)
pixels[x * xscale + i] = new_line[x];
}
}
}
private:
ioport_port *m_config;
ioport_value m_artifacting;
ioport_value m_saved_artifacting;
pixel_t m_saved_c0, m_saved_c1;
pixel_t m_expanded_colors[128];
void update_colors(pixel_t c0, pixel_t c1);
static pixel_t mix_color(double factor, UINT8 c0, UINT8 c1);
};
enum border_color_t
{
BORDER_COLOR_BLACK,
BORDER_COLOR_GREEN,
BORDER_COLOR_WHITE,
BORDER_COLOR_ORANGE
};
// callbacks
devcb_resolved_write_line m_res_out_hsync_func;
devcb_resolved_write_line m_res_out_fsync_func;
// incidentals
character_map m_character_map;
artifacter m_artifacter;
// device-level overrides
virtual void device_start(void);
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
virtual void device_reset(void);
virtual void device_post_load(void);
// other overridables
virtual void new_frame(void);
virtual void horizontal_sync_changed(bool line);
virtual void field_sync_changed(bool line);
virtual void enter_bottom_border(void);
virtual void record_border_scanline(UINT16 physical_scanline);
virtual void record_body_scanline(UINT16 physical_scanline, UINT16 logical_scanline) = 0;
virtual void record_partial_body_scanline(UINT16 physical_scanline, UINT16 logical_scanline, INT32 start_clock, INT32 end_clock) = 0;
// miscellaneous
void video_flush(void);
const char *describe_context(void);
// setup functions
emu_timer *setup_timer(device_timer_id id, double offset, double period);
// converts to B&W
static pixel_t black_and_white(rgb_t color)
{
UINT8 average_color = (color.r() + color.g() + color.b()) / 3;
return rgb_t(average_color, average_color, average_color);
}
// changes the geometry
ATTR_FORCE_INLINE void set_geometry(UINT16 top_border_scanlines, UINT16 body_scanlines, bool wide)
{
if (UNEXPECTED((m_top_border_scanlines != top_border_scanlines)
|| (m_body_scanlines != body_scanlines)
|| (m_wide != wide)))
{
m_top_border_scanlines = top_border_scanlines;
m_body_scanlines = body_scanlines;
m_wide = wide;
update_field_sync_timer();
}
}
// calculates the border color
static ATTR_FORCE_INLINE border_color_t border_value(UINT8 mode, bool is_mc6847t1)
{
border_color_t result;
if (mode & MODE_AG)
{
// graphics
result = mode & MODE_CSS ? BORDER_COLOR_WHITE : BORDER_COLOR_GREEN;
}
else if (!is_mc6847t1 || ((mode & MODE_GM2) == 0))
{
// text, black border
result = BORDER_COLOR_BLACK;
}
else
{
// text, green or orange border
result = mode & MODE_CSS ? BORDER_COLOR_ORANGE : BORDER_COLOR_GREEN;
}
return result;
}
// checks to see if the video has changed
ATTR_FORCE_INLINE bool has_video_changed(void)
{
/* poll the artifacting config */
m_artifacter.poll_config();
/* if the video didn't change, indicate as much */
bool video_changed = m_video_changed;
m_video_changed = false;
return video_changed;
}
// updates a byte in the video state
template<class T>
ATTR_FORCE_INLINE bool update_value(T *ptr, T byte)
{
bool result = false;
if (*ptr != byte)
{
*ptr = byte;
m_video_changed = true;
result = true;
}
return result;
};
// template function for emitting graphics bytes
template<int bits_per_pixel, int xscale>
ATTR_FORCE_INLINE void emit_graphics(const UINT8 *data, int length, pixel_t *RESTRICT pixels, UINT16 color_base, const pixel_t *RESTRICT palette)
{
for (int i = 0; i < length; i++)
{
for (int j = 0; j < (8 / bits_per_pixel); j++)
{
for (int k = 0; k < xscale; k++)
{
UINT16 color = color_base + ((data[i] >> (8 - (j + 1) * bits_per_pixel)) & ((1 << bits_per_pixel) - 1));
pixels[(i * (8 / bits_per_pixel) + j) * xscale + k] = palette[color];
}
}
}
}
// template function for external bytes
template<int bits_per_pixel, int xscale>
ATTR_FORCE_INLINE void emit_extbytes(const UINT8 *data, int length, pixel_t *RESTRICT pixels, UINT16 color_base, const pixel_t *RESTRICT palette)
{
for (int i = 0; i < length; i++)
{
for (int j = 0; j < (8 / bits_per_pixel); j++)
{
for (int k = 0; k < xscale; k++)
{
UINT16 color = color_base + BIT(data[i], 7-j);
pixels[(i * (8 / bits_per_pixel) + j) * xscale + k] = palette[color];
}
}
}
}
// template function for emitting samples
template<int xscale>
UINT32 emit_mc6847_samples(UINT8 mode, const UINT8 *data, int length, pixel_t *RESTRICT pixels, const pixel_t *RESTRICT palette,
UINT8 (*get_char_rom)(running_machine &machine, UINT8 ch, int line), int x, int y)
{
UINT32 result = 0;
if (mode & MODE_AG)
{
/* graphics */
switch(mode & (MODE_GM2|MODE_GM1|MODE_GM0))
{
case 0:
emit_graphics<2, xscale * 4>(data, length, pixels, (mode & MODE_CSS) ? 4 : 0, palette);
result = length * 8 * xscale * 2;
break;
case MODE_GM0:
case MODE_GM1|MODE_GM0:
case MODE_GM2|MODE_GM0:
emit_graphics<1, xscale * 2>(data, length, pixels, (mode & MODE_CSS) ? 10 : 8, palette);
result = length * 8 * xscale * 2;
break;
case MODE_GM1:
case MODE_GM2:
case MODE_GM2|MODE_GM1:
emit_graphics<2, xscale * 2>(data, length, pixels, (mode & MODE_CSS) ? 4 : 0, palette);
result = length * 8 * xscale;
break;
case MODE_GM2|MODE_GM1|MODE_GM0:
emit_graphics<1, xscale * 1>(data, length, pixels, (mode & MODE_CSS) ? 10 : 8, palette);
result = length * 8 * xscale;
break;
default:
/* should not get here */
fatalerror("Should not get here\n");
break;
}
}
else if ((get_char_rom != NULL) && ((mode & (MODE_AG|MODE_AS|MODE_INTEXT)) == MODE_INTEXT))
{
/* external ROM */
for (int i = 0; i < length; i++)
{
UINT8 byte = get_char_rom(machine(), data[i], y % 12) ^ (mode & MODE_INV ? 0xFF : 0x00);
emit_extbytes<1, xscale>(&byte, 1, &pixels[i * 8], (mode & MODE_CSS) ? 14 : 12, palette);
}
result = length * 8 * xscale;
}
else
{
/* text/semigraphics */
m_character_map.emit_character<xscale>(mode, data, length, pixels, y, palette);
result = length * 8 * xscale;
}
return result;
}
private:
enum scanline_zone
{
SCANLINE_ZONE_TOP_BORDER,
SCANLINE_ZONE_BODY,
SCANLINE_ZONE_BOTTOM_BORDER,
SCANLINE_ZONE_RETRACE,
SCANLINE_ZONE_VBLANK,
SCANLINE_ZONE_FRAME_END
};
// timers
emu_timer *m_frame_timer;
emu_timer *m_hsync_on_timer;
emu_timer *m_hsync_off_timer;
emu_timer *m_fsync_timer;
// incidentals
double m_tpfs;
int m_field_sync_falling_edge_scanline;
bool m_wide;
bool m_video_changed;
UINT16 m_top_border_scanlines;
UINT16 m_body_scanlines;
bool m_recording_scanline;
bool m_supports_partial_body_scanlines;
// video state
UINT16 m_physical_scanline;
UINT16 m_logical_scanline;
UINT16 m_logical_scanline_zone;
bool m_horizontal_sync;
bool m_field_sync;
UINT32 m_partial_scanline_clocks;
// functions
void change_horizontal_sync(bool line);
void change_field_sync(bool line);
void update_field_sync_timer(void);
void next_scanline(void);
INT32 get_clocks_since_hsync();
// debugging
const char *scanline_zone_string(scanline_zone zone);
};
// actual base class for MC6847 family of devices
class mc6847_base_device : public mc6847_friend_device
{
public:
/* updates the screen -- this will call begin_update(),
followed by update_row() reapeatedly and after all row
updating is complete, end_update() */
UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
// mode changing operations
DECLARE_WRITE_LINE_MEMBER( ag_w ) { change_mode(MODE_AG, state); }
DECLARE_WRITE_LINE_MEMBER( gm2_w ) { change_mode(MODE_GM2, state); }
DECLARE_WRITE_LINE_MEMBER( gm1_w ) { change_mode(MODE_GM1, state); }
DECLARE_WRITE_LINE_MEMBER( gm0_w ) { change_mode(MODE_GM0, state); }
DECLARE_WRITE_LINE_MEMBER( as_w ) { change_mode(MODE_AS, state); }
DECLARE_WRITE_LINE_MEMBER( css_w ) { change_mode(MODE_CSS, state); }
DECLARE_WRITE_LINE_MEMBER( intext_w ) { change_mode(MODE_INTEXT, state); }
DECLARE_WRITE_LINE_MEMBER( inv_w ) { change_mode(MODE_INV, state); }
protected:
mc6847_base_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const UINT8 *fontdata, double tpfs, const char *shortname, const char *source);
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual ioport_constructor device_input_ports() const;
// other overrides
virtual void field_sync_changed(bool line);
virtual void record_body_scanline(UINT16 physical_scanline, UINT16 scanline);
virtual void record_partial_body_scanline(UINT16 physical_scanline, UINT16 logical_scanline, INT32 start_clock, INT32 end_clock);
void set_custom_palette(const pixel_t *custom_palette)
{
if ( m_palette != m_bw_palette )
{
m_palette = custom_palette ? custom_palette : s_palette;
}
}
private:
struct video_scanline
{
UINT8 m_sample_count;
UINT8 m_mode[32];
UINT8 m_data[32];
};
// palette
static const int PALETTE_LENGTH = 16;
static const UINT32 s_palette[PALETTE_LENGTH];
// callbacks
devcb_resolved_read8 m_res_input_func;
UINT8 (*m_get_char_rom)(running_machine &machine, UINT8 ch, int line);
// incidentals
UINT8 m_fixed_mode;
UINT8 m_fixed_mode_mask;
const pixel_t *m_palette;
pixel_t m_bw_palette[PALETTE_LENGTH];
// state
UINT8 m_mode;
UINT16 m_video_address;
bool m_dirty;
video_scanline m_data[192];
void change_mode(UINT8 mode, int state)
{
// sanity check, to ensure that we're not changing fixed modes
assert((mode & m_fixed_mode_mask) == 0);
// calculate new mode
UINT8 new_mode;
if (state)
new_mode = m_mode | mode;
else
new_mode = m_mode & ~mode;
// has the mode changed?
if (new_mode != m_mode)
{
// it has! check dirty flag
video_flush();
if (!m_dirty)
{
m_dirty = true;
}
// and set the new mode
m_mode = new_mode;
}
}
// setup functions
void setup_fixed_mode(struct devcb_read_line callback, UINT8 mode);
// runtime functions
void record_body_scanline(UINT16 physical_scanline, UINT16 scanline, INT32 start_pos, INT32 end_pos);
pixel_t border_value(UINT8 mode, const pixel_t *palette, bool is_mc6847t1);
template<int xscale>
void emit_samples(UINT8 mode, const UINT8 *data, int length, pixel_t *pixels, int x, int y);
// template function for doing video update collection
template<int sample_count, int yres>
void record_scanline_res(int scanline, INT32 start_pos, INT32 end_pos);
// miscellaneous
UINT8 input(UINT16 address);
INT32 scanline_position_from_clock(INT32 clocks_since_hsync);
};
//**************************************************************************
// VARIATIONS
//**************************************************************************
class mc6847_ntsc_device : public mc6847_base_device
{
public:
mc6847_ntsc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};
class mc6847_pal_device : public mc6847_base_device
{
public:
mc6847_pal_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};
class mc6847y_ntsc_device : public mc6847_base_device
{
public:
mc6847y_ntsc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};
class mc6847y_pal_device : public mc6847_base_device
{
public:
mc6847y_pal_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};
class mc6847t1_ntsc_device : public mc6847_base_device
{
public:
mc6847t1_ntsc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};
class mc6847t1_pal_device : public mc6847_base_device
{
public:
mc6847t1_pal_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};
class s68047_device : public mc6847_base_device
{
public:
s68047_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
void hack_black_becomes_blue(bool flag);
private:
static const UINT32 s_s68047_hack_palette[16];
};
extern const device_type MC6847_NTSC;
extern const device_type MC6847_PAL;
extern const device_type MC6847Y_NTSC;
extern const device_type MC6847Y_PAL;
extern const device_type MC6847T1_NTSC;
extern const device_type MC6847T1_PAL;
extern const device_type S68047;
#endif /* __MC6847__ */
|