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r7486 Thursday 4th March, 2010 at 14:09:51 UTC by Curt Coder
[TANDY2K] Added some video chip logic.

[src/mess/drivers]	tandy2k.c
[src/mess/video]	crt9007.c crt9007.h

src/mess/video/crt9007.c

r7485	r7486
1	1	/**********************************************************************
2	2
3		SMC CRT9007 CRT Video Processor and Controller VPAC emulation
	3	SMC CRT9007 CRT Video Processor and Controller (VPAC) emulation
4	4
5	5	Copyright MESS Team.
6	6	Visit http://mamedev.org for licensing and usage restrictions.
7	7
8	8	**********************************************************************/
9	9
	10	/*
	11
	12	TODO:
	13
	14	- interrupts
	15	- status register
	16	- reset
	17	- DMA mode (currently forcing to non-DMA mode)
	18	- cursor/blank skew
	19	- sequential breaks
	20	- interlaced mode
	21	- smooth scroll
	22	- page blank
	23	- double height cursor
	24	- row attributes
	25	- pin configuration
	26	- operation modes 0,4,7
	27	- address modes 1,2,3
	28	- light pen
	29	- variable clock frequency
	30	- variable hpixels_per_column
	31	- state saving
	32
	33	*/
	34
10	35	#include "emu.h"
11	36	#include "crt9007.h"
12	37
r7485	r7486
16	41
17	42	#define LOG 1
18	43
	44	#define HAS_VALID_PARAMETERS \
	45	(crt9007->reg[0x00] && crt9007->reg[0x01] && crt9007->reg[0x07] && crt9007->reg[0x08] && crt9007->reg[0x09])
	46
	47	#define CHARACTERS_PER_HORIZONTAL_PERIOD \
	48	crt9007->reg[0x00]
	49
	50	#define CHARACTERS_PER_DATA_ROW \
	51	(crt9007->reg[0x01] + 1)
	52
	53	#define HORIZONTAL_DELAY \
	54	crt9007->reg[0x02]
	55
	56	#define HORIZONTAL_SYNC_WIDTH \
	57	crt9007->reg[0x03]
	58
	59	#define VERTICAL_SYNC_WIDTH \
	60	crt9007->reg[0x04]
	61
	62	#define VERTICAL_DELAY \
	63	(crt9007->reg[0x05] - 1)
	64
	65	#define PIN_CONFIGURATION \
	66	(crt9007->reg[0x06] >> 6)
	67
	68	#define CURSOR_SKEW \
	69	((crt9007->reg[0x06] >> 3) & 0x07)
	70
	71	#define BLANK_SKEW \
	72	(crt9007->reg[0x06] & 0x07)
	73
	74	#define VISIBLE_DATA_ROWS_PER_FRAME \
	75	(crt9007->reg[0x07] + 1)
	76
	77	#define SCAN_LINES_PER_DATA_ROW \
	78	((crt9007->reg[0x08] & 0x1f) + 1)
	79
	80	#define SCAN_LINES_PER_FRAME \
	81	(((crt9007->reg[0x08] << 3) & 0xff00) | crt9007->reg[0x09])
	82
	83	#define DMA_BURST_COUNT \
	84	(crt9007->reg[0x0a] & 0x0f)
	85
	86	#define DMA_BURST_DELAY \
	87	((crt9007->reg[0x0a] >> 4) & 0x07)
	88
	89	#define DMA_DISABLE \
	90	BIT(crt9007->reg[0x0a], 7)
	91
	92	#define OPERATION_MODE \
	93	((crt9007->reg[0x0b] >> 1) & 0x07)
	94
	95	#define INTERLACE_MODE \
	96	((crt9007->reg[0x0b] >> 4) & 0x03)
	97
	98	#define TABLE_START \
	99	(((crt9007->reg[0x0d] << 8) & 0x3f00) | crt9007->reg[0x0c])
	100
	101	#define ADDRESS_MODE \
	102	((crt9007->reg[0x0d] >> 6) & 0x03)
	103
	104	#define AUXILIARY_ADDRESS_1 \
	105	(((crt9007->reg[0x0f] << 8) & 0x3f00) | crt9007->reg[0x0e])
	106
	107	#define SEQUENTIAL_BREAK_1 \
	108	crt9007->reg[0x10]
	109
	110	#define SEQUENTIAL_BREAK_2 \
	111	crt9007->reg[0x12]
	112
	113	#define DATA_ROW_START \
	114	crt9007->reg[0x11]
	115
	116	#define DATA_ROW_END \
	117	crt9007->reg[0x12]
	118
	119	#define AUXILIARY_ADDRESS_2 \
	120	(((crt9007->reg[0x14] << 8) & 0x3f00) | crt9007->reg[0x13])
	121
	122	#define SMOOTH_SCROLL_OFFSET \
	123	((crt9007->reg[0x17] >> 1) & 0x3f)
	124
	125	#define SMOOTH_SCROLL_OFFSET_OVERFLOW \
	126	BIT(crt9007->reg[0x17], 7)
	127
	128	#define VERTICAL_CURSOR \
	129	crt9007->reg[0x18]
	130
	131	#define HORIZONTAL_CURSOR \
	132	crt9007->reg[0x19]
	133
	134	#define FRAME_TIMER \
	135	BIT(crt9007->reg[0x1a], 0)
	136
	137	#define LIGHT_PEN_INTERRUPT \
	138	BIT(crt9007->reg[0x1a], 5)
	139
	140	#define VERTICAL_RETRACE_INTERRUPT \
	141	BIT(crt9007->reg[0x1a], 6)
	142
	143	#define VERTICAL_LIGHT_PEN \
	144	crt9007->reg[0x3b]
	145
	146	#define HORIZONTAL_LIGHT_PEN \
	147	crt9007->reg[0x3c]
	148
	149	enum
	150	{
	151	NON_INTERLACED = 0,
	152	ENHANCED_VIDEO_INTERFACE,
	153	NORMAL_VIDEO_INTERFACE,
	154	};
	155
	156	enum
	157	{
	158	OPERATION_MODE_REPETITIVE_MEMORY_ADDRESSING = 0,
	159	OPERATION_MODE_DOUBLE_ROW_BUFFER,
	160	OPERATION_MODE_SINGLE_ROW_BUFFER = 4,
	161	OPERATION_MODE_ATTRIBUTE_ASSEMBLE = 7
	162	};
	163
	164	enum
	165	{
	166	ADDRESS_MODE_SEQUENTIAL_ADDRESSING = 0,
	167	ADDRESS_MODE_SEQUENTIAL_ROLL_ADDRESSING,
	168	ADDRESS_MODE_CONTIGUOUS_ROW_TABLE,
	169	ADDRESS_MODE_LINKED_LIST_ROW_TABLE
	170	};
	171
	172	#define STATUS_INTERRUPT_PENDING   0x80
	173	#define STATUS_VERTICAL_RETRACE      0x40
	174	#define STATUS_LIGHT_PEN_UPDATE      0x20
	175	#define STATUS_ODD_EVEN            0x04
	176	#define STATUS_FRAME_TIMER_OCCURRED   0x01
	177
19	178	/***************************************************************************
20	179	TYPE DEFINITIONS
21	180	***************************************************************************/
r7485	r7486
29	188	devcb_resolved_write_line   out_vs_func;
30	189	devcb_resolved_read8      in_vd_func;
31	190
32		UINT8 reg[64];
	191	crt9007_draw_scanline_func   draw_scanline_func;
	192
	193	running_device *screen;         /* screen */
	194
	195	/* registers */
	196	UINT8 reg[0x3d];
	197	UINT8 status;
	198
	199	int disp;
	200	int hpixels_per_column;
	201
	202	/* runtime variables, do not state save */
	203	int vsync_start;
	204	int vsync_end;
	205	int hsync_start;
	206	int hsync_end;
	207
	208	/* timers */
	209	emu_timer *vsync_timer;         /* vertical sync timer */
	210	emu_timer *hsync_timer;         /* horizontal sync timer */
33	211	};
34	212
35	213	/***************************************************************************
r7485	r7486
53	231	/***************************************************************************
54	232	IMPLEMENTATION
55	233	***************************************************************************/
	234
56	235	/*-------------------------------------------------
	236	update_vsync_timer -
	237	-------------------------------------------------*/
	238
	239	static void update_vsync_timer(crt9007_t *crt9007, int state)
	240	{
	241	int next_y = state ? crt9007->vsync_start : crt9007->vsync_end;
	242
	243	attotime duration = video_screen_get_time_until_pos(crt9007->screen, next_y, 0);
	244
	245	timer_adjust_oneshot(crt9007->vsync_timer, duration, !state);
	246	}
	247
	248	/*-------------------------------------------------
	249	TIMER_CALLBACK( vsync_tick )
	250	-------------------------------------------------*/
	251
	252	static TIMER_CALLBACK( vsync_tick )
	253	{
	254	running_device *device = (running_device *)ptr;
	255	crt9007_t *crt9007 = get_safe_token(device);
	256
	257	devcb_call_write_line(&crt9007->out_vs_func, param);
	258
	259	update_vsync_timer(crt9007, param);
	260	}
	261
	262	/*-------------------------------------------------
	263	update_hsync_timer -
	264	-------------------------------------------------*/
	265
	266	static void update_hsync_timer(crt9007_t *crt9007, int state)
	267	{
	268	int y = video_screen_get_vpos(crt9007->screen);
	269
	270	int next_x = state ? crt9007->hsync_start : crt9007->hsync_end;
	271	int next_y = (y + 1) % SCAN_LINES_PER_FRAME;
	272
	273	attotime duration = video_screen_get_time_until_pos(crt9007->screen, next_y, next_x);
	274
	275	timer_adjust_oneshot(crt9007->hsync_timer, duration, !state);
	276	}
	277
	278	/*-------------------------------------------------
	279	TIMER_CALLBACK( hsync_tick )
	280	-------------------------------------------------*/
	281
	282	static TIMER_CALLBACK( hsync_tick )
	283	{
	284	running_device *device = (running_device *)ptr;
	285	crt9007_t *crt9007 = get_safe_token(device);
	286
	287	devcb_call_write_line(&crt9007->out_hs_func, param);
	288
	289	update_hsync_timer(crt9007, param);
	290	}
	291
	292	/*-------------------------------------------------
	293	recompute_parameters -
	294	-------------------------------------------------*/
	295
	296	static void recompute_parameters(running_device *device)
	297	{
	298	crt9007_t *crt9007 = get_safe_token(device);
	299
	300	/* check that necessary registers have been loaded */
	301	if (!HAS_VALID_PARAMETERS) return;
	302
	303	int horiz_pix_total = CHARACTERS_PER_HORIZONTAL_PERIOD * crt9007->hpixels_per_column;
	304	int vert_pix_total = SCAN_LINES_PER_FRAME;
	305
	306	attoseconds_t refresh = HZ_TO_ATTOSECONDS(device->clock) * horiz_pix_total * vert_pix_total;
	307
	308	rectangle visarea;
	309
	310	visarea.min_x = 0;
	311	visarea.min_y = 0;
	312	visarea.max_x = (CHARACTERS_PER_DATA_ROW * crt9007->hpixels_per_column) - 1;
	313	visarea.max_y = (VISIBLE_DATA_ROWS_PER_FRAME * SCAN_LINES_PER_DATA_ROW) - 1;
	314
	315	if (LOG)
	316	{
	317	logerror("CRT9007 '%s' Screen: %u x %u @ %f Hz\n", device->tag.cstr(), horiz_pix_total, vert_pix_total, 1 / ATTOSECONDS_TO_DOUBLE(refresh));
	318	logerror("CRT9007 '%s' Visible Area: (%u, %u) - (%u, %u)\n", device->tag.cstr(), visarea.min_x, visarea.min_y, visarea.max_x, visarea.max_y);
	319	}
	320
	321	video_screen_configure(crt9007->screen, horiz_pix_total, vert_pix_total, &visarea, refresh);
	322
	323	crt9007->vsync_start = VISIBLE_DATA_ROWS_PER_FRAME - VERTICAL_DELAY;
	324	crt9007->vsync_end = (crt9007->vsync_start + VERTICAL_SYNC_WIDTH) % VISIBLE_DATA_ROWS_PER_FRAME;
	325	crt9007->hsync_start = (CHARACTERS_PER_HORIZONTAL_PERIOD - HORIZONTAL_DELAY) * crt9007->hpixels_per_column;
	326	crt9007->hsync_end = ((crt9007->hsync_start + HORIZONTAL_SYNC_WIDTH) % CHARACTERS_PER_HORIZONTAL_PERIOD) * crt9007->hpixels_per_column;
	327
	328	update_hsync_timer(crt9007, 1);
	329	update_vsync_timer(crt9007, 1);
	330	}
	331
	332	/*-------------------------------------------------
57	333	crt9007_r - register read
58	334	-------------------------------------------------*/
59	335
r7485	r7486
66	342	switch (offset)
67	343	{
68	344	case 0x15:
	345	crt9007->disp = 1;
69	346	if (LOG) logerror("CRT9007 '%s' Start\n", device->tag.cstr());
70	347	break;
71	348
72	349	case 0x16:
	350	crt9007->disp = 0;
73	351	if (LOG) logerror("CRT9007 '%s' Reset\n", device->tag.cstr());
74	352	break;
75	353
76	354	case 0x38:
77		data = crt9007->reg[0x18];
	355	data = VERTICAL_CURSOR;
78	356	break;
79	357
80	358	case 0x39:
81		data = crt9007->reg[0x19];
	359	data = HORIZONTAL_CURSOR;
82	360	break;
83	361
84	362	case 0x3a:
	363	data = crt9007->status;
85	364	break;
86	365
87	366	case 0x3b:
	367	data = VERTICAL_LIGHT_PEN;
88	368	break;
89	369
90	370	case 0x3c:
	371	data = HORIZONTAL_LIGHT_PEN;
91	372	break;
92	373
93	374	default:
r7485	r7486
110	391	switch (offset)
111	392	{
112	393	case 0x00:
113		if (LOG) logerror("CRT9007 '%s' Characters per Horizontal Period: %u\n", device->tag.cstr(), data);
	394	recompute_parameters(device);
	395	if (LOG) logerror("CRT9007 '%s' Characters per Horizontal Period: %u\n", device->tag.cstr(), CHARACTERS_PER_HORIZONTAL_PERIOD);
114	396	break;
115	397
116	398	case 0x01:
117		if (LOG) logerror("CRT9007 '%s' Characters per Data Row: %u\n", device->tag.cstr(), data + 1);
	399	recompute_parameters(device);
	400	if (LOG) logerror("CRT9007 '%s' Characters per Data Row: %u\n", device->tag.cstr(), CHARACTERS_PER_DATA_ROW);
118	401	break;
119	402
120	403	case 0x02:
121		if (LOG) logerror("CRT9007 '%s' Horizontal Delay: %u\n", device->tag.cstr(), data);
	404	recompute_parameters(device);
	405	if (LOG) logerror("CRT9007 '%s' Horizontal Delay: %u\n", device->tag.cstr(), HORIZONTAL_DELAY);
122	406	break;
123	407
124	408	case 0x03:
125		if (LOG) logerror("CRT9007 '%s' Horizontal Sync Width: %u\n", device->tag.cstr(), data);
	409	recompute_parameters(device);
	410	if (LOG) logerror("CRT9007 '%s' Horizontal Sync Width: %u\n", device->tag.cstr(), HORIZONTAL_SYNC_WIDTH);
126	411	break;
127	412
128	413	case 0x04:
129		if (LOG) logerror("CRT9007 '%s' Vertical Sync Width: %u\n", device->tag.cstr(), data);
	414	recompute_parameters(device);
	415	if (LOG) logerror("CRT9007 '%s' Vertical Sync Width: %u\n", device->tag.cstr(), VERTICAL_SYNC_WIDTH);
130	416	break;
131	417
132	418	case 0x05:
133		if (LOG) logerror("CRT9007 '%s' Vertical Delay: %u\n", device->tag.cstr(), data - 1);
	419	recompute_parameters(device);
	420	if (LOG) logerror("CRT9007 '%s' Vertical Delay: %u\n", device->tag.cstr(), VERTICAL_DELAY);
134	421	break;
135	422
136	423	case 0x06:
	424	recompute_parameters(device);
137	425	if (LOG)
138	426	{
139		logerror("CRT9007 '%s' Pin Configuration: %u\n", device->tag.cstr(), data >> 6);
140		logerror("CRT9007 '%s' Cursor Skew: %u\n", device->tag.cstr(), (data >> 3) & 0x07);
141		logerror("CRT9007 '%s' Blank Skew: %u\n", device->tag.cstr(), data & 0x07);
	427	logerror("CRT9007 '%s' Pin Configuration: %u\n", device->tag.cstr(), PIN_CONFIGURATION);
	428	logerror("CRT9007 '%s' Cursor Skew: %u\n", device->tag.cstr(), CURSOR_SKEW);
	429	logerror("CRT9007 '%s' Blank Skew: %u\n", device->tag.cstr(), BLANK_SKEW);
142	430	}
143	431	break;
144	432
145	433	case 0x07:
146		if (LOG) logerror("CRT9007 '%s' Visible Data Rows per Frame: %u\n", device->tag.cstr(), data + 1);
	434	recompute_parameters(device);
	435	if (LOG) logerror("CRT9007 '%s' Visible Data Rows per Frame: %u\n", device->tag.cstr(), VISIBLE_DATA_ROWS_PER_FRAME);
147	436	break;
148	437
149	438	case 0x08:
150		if (LOG) logerror("CRT9007 '%s' Scan Lines per Data Row: %u\n", device->tag.cstr(), (data & 0x1f) + 1);
	439	recompute_parameters(device);
	440	if (LOG) logerror("CRT9007 '%s' Scan Lines per Data Row: %u\n", device->tag.cstr(), SCAN_LINES_PER_DATA_ROW);
151	441	break;
152	442
153	443	case 0x09:
154		if (LOG) logerror("CRT9007 '%s' Scan Lines per Frame: %u\n", device->tag.cstr(), ((crt9007->reg[0x08] << 3) & 0xff00) | data);
	444	recompute_parameters(device);
	445	if (LOG) logerror("CRT9007 '%s' Scan Lines per Frame: %u\n", device->tag.cstr(), SCAN_LINES_PER_FRAME);
155	446	break;
156	447
157	448	case 0x0a:
158	449	if (LOG)
159	450	{
160		logerror("CRT9007 '%s' DMA Burst Count: %u\n", device->tag.cstr(), (data & 0x0f) + 1);
161		logerror("CRT9007 '%s' DMA Burst Delay: %u\n", device->tag.cstr(), (data >> 4) & 0x07);
162		logerror("CRT9007 '%s' DMA Disable: %u\n", device->tag.cstr(), BIT(data, 7));
	451	logerror("CRT9007 '%s' DMA Burst Count: %u\n", device->tag.cstr(), DMA_BURST_COUNT);
	452	logerror("CRT9007 '%s' DMA Burst Delay: %u\n", device->tag.cstr(), DMA_BURST_DELAY);
	453	logerror("CRT9007 '%s' DMA Disable: %u\n", device->tag.cstr(), DMA_DISABLE);
163	454	}
164	455	break;
165	456
r7485	r7486
167	458	if (LOG)
168	459	{
169	460	logerror("CRT9007 '%s' %s Height Cursor\n", device->tag.cstr(), BIT(data, 0) ? "Single" : "Double");
170		logerror("CRT9007 '%s' Operation Mode: %u\n", device->tag.cstr(), (data >> 1) & 0x07);
171		logerror("CRT9007 '%s' Interlace Mode: %u\n", device->tag.cstr(), (data >> 4) & 0x03);
	461	logerror("CRT9007 '%s' Operation Mode: %u\n", device->tag.cstr(), OPERATION_MODE);
	462	logerror("CRT9007 '%s' Interlace Mode: %u\n", device->tag.cstr(), INTERLACE_MODE);
172	463	logerror("CRT9007 '%s' %s Mechanism\n", device->tag.cstr(), BIT(data, 6) ? "Page Blank" : "Smooth Scroll");
173	464	}
174	465	break;
r7485	r7486
179	470	case 0x0d:
180	471	if (LOG)
181	472	{
182		logerror("CRT9007 '%s' Table Start Register: %04x\n", device->tag.cstr(), ((data << 8) & 0x3f00) | crt9007->reg[0x0c]);
183		logerror("CRT9007 '%s' Address Mode: %u\n", device->tag.cstr(), (data >> 6) & 0x03);
	473	logerror("CRT9007 '%s' Table Start Register: %04x\n", device->tag.cstr(), TABLE_START);
	474	logerror("CRT9007 '%s' Address Mode: %u\n", device->tag.cstr(), ADDRESS_MODE);
184	475	}
185	476	break;
186	477
r7485	r7486
190	481	case 0x0f:
191	482	if (LOG)
192	483	{
193		logerror("CRT9007 '%s' Auxialiary Address Register 1: %04x\n", device->tag.cstr(), ((data << 8) & 0x3f00) | crt9007->reg[0x0e]);
	484	logerror("CRT9007 '%s' Auxialiary Address Register 1: %04x\n", device->tag.cstr(), AUXILIARY_ADDRESS_1);
194	485	logerror("CRT9007 '%s' Row Attributes: %u\n", device->tag.cstr(), (data >> 6) & 0x03);
195	486	}
196	487	break;
197	488
198	489	case 0x10:
199		if (LOG) logerror("CRT9007 '%s' Sequential Break Register 1: %u\n", device->tag.cstr(), data);
	490	if (LOG) logerror("CRT9007 '%s' Sequential Break Register 1: %u\n", device->tag.cstr(), SEQUENTIAL_BREAK_1);
200	491	break;
201	492
202	493	case 0x11:
203		if (LOG) logerror("CRT9007 '%s' Data Row Start Register: %u\n", device->tag.cstr(), data);
	494	if (LOG) logerror("CRT9007 '%s' Data Row Start Register: %u\n", device->tag.cstr(), DATA_ROW_START);
204	495	break;
205	496
206	497	case 0x12:
207		if (LOG) logerror("CRT9007 '%s' Data Row End/Sequential Break Register 2: %u\n", device->tag.cstr(), data);
	498	if (LOG) logerror("CRT9007 '%s' Data Row End/Sequential Break Register 2: %u\n", device->tag.cstr(), SEQUENTIAL_BREAK_2);
208	499	break;
209	500
210	501	case 0x13:
r7485	r7486
213	504	case 0x14:
214	505	if (LOG)
215	506	{
216		logerror("CRT9007 '%s' Auxiliary Address Register 2: %04x\n", device->tag.cstr(), ((data << 8) & 0x3f00) | crt9007->reg[0x13]);
	507	logerror("CRT9007 '%s' Auxiliary Address Register 2: %04x\n", device->tag.cstr(), AUXILIARY_ADDRESS_2);
217	508	logerror("CRT9007 '%s' Row Attributes: %u\n", device->tag.cstr(), (data >> 6) & 0x03);
218	509	}
219	510	break;
220	511
221	512	case 0x15:
	513	crt9007->disp = 1;
222	514	if (LOG) logerror("CRT9007 '%s' Start\n", device->tag.cstr());
223	515	break;
224	516
225	517	case 0x16:
	518	crt9007->disp = 0;
226	519	if (LOG) logerror("CRT9007 '%s' Reset\n", device->tag.cstr());
227	520	break;
228	521
229	522	case 0x17:
230	523	if (LOG)
231	524	{
232		logerror("CRT9007 '%s' Smooth Scroll Offset: %u\n", device->tag.cstr(), (data >> 1) & 0x3f);
233		logerror("CRT9007 '%s' Smooth Scroll Offset Overflow: %u\n", device->tag.cstr(), BIT(data, 7));
	525	logerror("CRT9007 '%s' Smooth Scroll Offset: %u\n", device->tag.cstr(), SMOOTH_SCROLL_OFFSET);
	526	logerror("CRT9007 '%s' Smooth Scroll Offset Overflow: %u\n", device->tag.cstr(), SMOOTH_SCROLL_OFFSET_OVERFLOW);
234	527	}
235	528	break;
236	529
237	530	case 0x18:
238		if (LOG) logerror("CRT9007 '%s' Vertical Cursor Register: %u\n", device->tag.cstr(), data);
	531	if (LOG) logerror("CRT9007 '%s' Vertical Cursor Register: %u\n", device->tag.cstr(), VERTICAL_CURSOR);
239	532	break;
240	533
241	534	case 0x19:
242		if (LOG) logerror("CRT9007 '%s' Horizontal Cursor Register: %u\n", device->tag.cstr(), data);
	535	if (LOG) logerror("CRT9007 '%s' Horizontal Cursor Register: %u\n", device->tag.cstr(), HORIZONTAL_CURSOR);
243	536	break;
244	537
245	538	case 0x1a:
r7485	r7486
257	550	}
258	551
259	552	/*-------------------------------------------------
	553	crt9007_ack_w - DMA acknowledge
	554	-------------------------------------------------*/
	555
	556	WRITE8_DEVICE_HANDLER( crt9007_ack_w )
	557	{
	558	}
	559
	560	/*-------------------------------------------------
	561	crt9007_lpstb_w - light pen strobe
	562	-------------------------------------------------*/
	563
	564	WRITE_LINE_DEVICE_HANDLER( crt9007_lpstb_w )
	565	{
	566	}
	567
	568	/*-------------------------------------------------
260	569	crt9007_update - update screen
261	570	-------------------------------------------------*/
262	571
263	572	void crt9007_update(running_device *device, bitmap_t *bitmap, const rectangle *cliprect)
264	573	{
	574	crt9007_t *crt9007 = get_safe_token(device);
	575
	576	if (crt9007->disp && HAS_VALID_PARAMETERS)
	577	{
	578	for (int y = 0; y < (VISIBLE_DATA_ROWS_PER_FRAME * SCAN_LINES_PER_DATA_ROW); y++)
	579	{
	580	int sl = y % SCAN_LINES_PER_DATA_ROW;
	581	int sy = y / SCAN_LINES_PER_DATA_ROW;
	582	int cursor_x = (sy == VERTICAL_CURSOR) ? HORIZONTAL_CURSOR : -1;
	583	UINT16 addr = TABLE_START + (sy * CHARACTERS_PER_DATA_ROW);
	584	UINT8 data = devcb_call_read8(&crt9007->in_vd_func, addr);
	585
	586	crt9007->draw_scanline_func(device, bitmap, cliprect, addr, sl, data, y, 0, CHARACTERS_PER_DATA_ROW, cursor_x);
	587
	588	addr++;
	589	}
	590	}
	591	else
	592	{
	593	bitmap_fill(bitmap, cliprect, get_black_pen(device->machine));
	594	}
265	595	}
266	596
267	597	/*-------------------------------------------------
r7485	r7486
280	610	devcb_resolve_write_line(&crt9007->out_vs_func, &intf->out_vs_func, device);
281	611	devcb_resolve_read8(&crt9007->in_vd_func, &intf->in_vd_func, device);
282	612
	613	crt9007->draw_scanline_func = intf->draw_scanline_func;
	614	assert(crt9007->draw_scanline_func != NULL);
	615
	616	/* get the screen device */
	617	crt9007->screen = devtag_get_device(device->machine, intf->screen_tag);
	618	assert(crt9007->screen != NULL);
	619
	620	/* set horizontal pixels per column */
	621	crt9007->hpixels_per_column = intf->hpixels_per_column;
	622
	623	/* create the timers */
	624	crt9007->vsync_timer = timer_alloc(device->machine, vsync_tick, (void *)device);
	625	crt9007->hsync_timer = timer_alloc(device->machine, hsync_tick, (void *)device);
	626
283	627	/* register for state saving */
284	628	//   state_save_register_device_item(device, 0, crt9007->);
285	629	}

src/mess/video/crt9007.h

r7485	r7486
1	1	/**********************************************************************
2	2
3		SMC CRT9007 CRT Video Processor and Controller VPAC emulation
	3	SMC CRT9007 CRT Video Processor and Controller (VPAC) emulation
4	4
5	5	Copyright MESS Team.
6	6	Visit http://mamedev.org for licensing and usage restrictions.
r7485	r7486
52	52	TYPE DEFINITIONS
53	53	***************************************************************************/
54	54
	55	typedef void (*crt9007_draw_scanline_func)(running_device *device, bitmap_t *bitmap, const rectangle *cliprect, UINT16 va, UINT8 sl, UINT8 data, int y, int x, int x_count, int cursor_x);
	56	#define CRT9007_DRAW_SCANLINE(name) void name(running_device *device, bitmap_t *bitmap, const rectangle *cliprect, UINT16 va, UINT8 sl, UINT8 data, int y, int x, int x_count, int cursor_x)
	57
55	58	typedef struct _crt9007_interface crt9007_interface;
56	59	struct _crt9007_interface
57	60	{
	61	const char *screen_tag;      /* screen we are acting on */
	62	int hpixels_per_column;      /* number of pixels per video memory address */
	63
	64	crt9007_draw_scanline_func   draw_scanline_func;
	65
58	66	devcb_write_line      out_int_func;
59	67	devcb_write_line      out_dmar_func;
60	68
61	69	devcb_write_line      out_hs_func;
62	70	devcb_write_line      out_vs_func;
	71	/*
	72	devcb_write_line      out_cblank_func;
	73	devcb_write_line      out_vblank_func;
63	74
	75	devcb_write_line      out_vlt_func;
	76	devcb_write_line      out_curs_func;
	77	devcb_write_line      out_drb_func;
	78
	79	devcb_write_line      out_slg_func;
	80	devcb_write_line      out_sld_func;
	81	*/
64	82	devcb_read8            in_vd_func;
	83	devcb_write8         out_vd_func;
65	84	};
66	85
67	86	/***************************************************************************
r7485	r7486
75	94	READ8_DEVICE_HANDLER( crt9007_r );
76	95	WRITE8_DEVICE_HANDLER( crt9007_w );
77	96
	97	/* DMA acknowledge */
	98	WRITE8_DEVICE_HANDLER( crt9007_ack_w );
	99
	100	/* light pen strobe */
	101	WRITE_LINE_DEVICE_HANDLER( crt9007_lpstb_w );
	102
78	103	/* screen update */
79	104	void crt9007_update(running_device *device, bitmap_t *bitmap, const rectangle *cliprect);
80	105

src/mess/drivers/tandy2k.c

r7485	r7486
436	436	return 0;
437	437	}
438	438
	439	static CRT9007_DRAW_SCANLINE( tandy2k_crt9007_display_pixels )
	440	{
	441	}
	442
439	443	static CRT9007_INTERFACE( crt9007_intf )
440	444	{
	445	SCREEN_TAG,
	446	10,
	447	tandy2k_crt9007_display_pixels,
441	448	DEVCB_DEVICE_LINE(I8259A_1_TAG, pic8259_ir1_w),
442	449	DEVCB_NULL,
443	450	DEVCB_NULL,
444	451	DEVCB_NULL,
445		DEVCB_MEMORY_HANDLER(I80186_TAG, PROGRAM, memory_read_byte_16le)
	452	DEVCB_MEMORY_HANDLER(I80186_TAG, PROGRAM, memory_read_byte_16le),
	453	DEVCB_NULL
446	454	};
447	455
448	456	/* Intel 8251A Interface */
r7485	r7486
715	723
716	724	memory_install_ram(program, 0x00000, ram_size - 1, 0, 0, ram);
717	725
	726	/* patch ROM */
	727	UINT8 *rom = memory_region(machine, I80186_TAG);
	728	rom[0x1f16] = 0x90;
	729	rom[0x1f17] = 0x90;
	730
718	731	/* register for state saving */
719	732	//   state_save_register_global(machine, state->);
720	733	}

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