src/gb/video.c (view raw)
1/* Copyright (c) 2013-2016 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include <mgba/internal/gb/video.h>
7
8#include <mgba/core/sync.h>
9#include <mgba/core/thread.h>
10#include <mgba/core/cache-set.h>
11#include <mgba/internal/gb/gb.h>
12#include <mgba/internal/gb/io.h>
13#include <mgba/internal/gb/renderers/cache-set.h>
14#include <mgba/internal/gb/serialize.h>
15#include <mgba/internal/sm83/sm83.h>
16
17#include <mgba-util/memory.h>
18
19mLOG_DEFINE_CATEGORY(GB_VIDEO, "GB Video", "gb.video");
20
21static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders);
22static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer);
23static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
24static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
25static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
26static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
27static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
28static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
29static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
30static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer);
31static void GBVideoDummyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable);
32static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
33static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
34
35static void _cleanOAM(struct GBVideo* video, int y);
36
37static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
38static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
39static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
40static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
41static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
42
43void GBVideoInit(struct GBVideo* video) {
44 video->renderer = NULL;
45 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
46 video->frameskip = 0;
47
48 video->modeEvent.context = video;
49 video->modeEvent.name = "GB Video Mode";
50 video->modeEvent.callback = NULL;
51 video->modeEvent.priority = 8;
52 video->frameEvent.context = video;
53 video->frameEvent.name = "GB Video Frame";
54 video->frameEvent.callback = _updateFrameCount;
55 video->frameEvent.priority = 9;
56
57 video->dmgPalette[0] = 0x7FFF;
58 video->dmgPalette[1] = 0x56B5;
59 video->dmgPalette[2] = 0x294A;
60 video->dmgPalette[3] = 0x0000;
61 video->dmgPalette[4] = 0x7FFF;
62 video->dmgPalette[5] = 0x56B5;
63 video->dmgPalette[6] = 0x294A;
64 video->dmgPalette[7] = 0x0000;
65 video->dmgPalette[8] = 0x7FFF;
66 video->dmgPalette[9] = 0x56B5;
67 video->dmgPalette[10] = 0x294A;
68 video->dmgPalette[11] = 0x0000;
69
70 video->sgbBorders = true;
71}
72
73void GBVideoReset(struct GBVideo* video) {
74 video->ly = 0;
75 video->x = 0;
76 video->mode = 1;
77 video->stat = 1;
78
79 video->frameCounter = 0;
80 video->frameskipCounter = 0;
81
82 GBVideoSwitchBank(video, 0);
83 video->renderer->vram = video->vram;
84 memset(&video->oam, 0, sizeof(video->oam));
85 video->renderer->oam = &video->oam;
86 memset(&video->palette, 0, sizeof(video->palette));
87
88 if (video->p->model & GB_MODEL_SGB) {
89 video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
90 video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
91 video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
92 video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
93 video->renderer->sgbAttributes = malloc(90 * 45);
94 memset(video->renderer->sgbAttributes, 0, 90 * 45);
95 video->sgbCommandHeader = 0;
96 video->sgbBufferIndex = 0;
97 } else {
98 video->renderer->sgbCharRam = NULL;
99 video->renderer->sgbMapRam = NULL;
100 video->renderer->sgbPalRam = NULL;
101 video->renderer->sgbAttributes = NULL;
102 video->renderer->sgbAttributeFiles = NULL;
103 }
104
105 video->palette[0] = video->dmgPalette[0];
106 video->palette[1] = video->dmgPalette[1];
107 video->palette[2] = video->dmgPalette[2];
108 video->palette[3] = video->dmgPalette[3];
109 video->palette[8 * 4 + 0] = video->dmgPalette[4];
110 video->palette[8 * 4 + 1] = video->dmgPalette[5];
111 video->palette[8 * 4 + 2] = video->dmgPalette[6];
112 video->palette[8 * 4 + 3] = video->dmgPalette[7];
113 video->palette[9 * 4 + 0] = video->dmgPalette[8];
114 video->palette[9 * 4 + 1] = video->dmgPalette[9];
115 video->palette[9 * 4 + 2] = video->dmgPalette[10];
116 video->palette[9 * 4 + 3] = video->dmgPalette[11];
117
118 if (!video->renderer) {
119 mLOG(GB_VIDEO, FATAL, "No renderer associated");
120 return;
121 }
122
123 video->renderer->deinit(video->renderer);
124 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
125
126 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
127 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
128 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
129 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
130 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
131 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
132 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
133 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
134 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
135 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
136 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
137 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
138}
139
140void GBVideoDeinit(struct GBVideo* video) {
141 video->renderer->deinit(video->renderer);
142 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
143 if (video->renderer->sgbCharRam) {
144 mappedMemoryFree(video->renderer->sgbCharRam, SGB_SIZE_CHAR_RAM);
145 video->renderer->sgbCharRam = NULL;
146 }
147 if (video->renderer->sgbMapRam) {
148 mappedMemoryFree(video->renderer->sgbMapRam, SGB_SIZE_MAP_RAM);
149 video->renderer->sgbMapRam = NULL;
150 }
151 if (video->renderer->sgbPalRam) {
152 mappedMemoryFree(video->renderer->sgbPalRam, SGB_SIZE_PAL_RAM);
153 video->renderer->sgbPalRam = NULL;
154 }
155 if (video->renderer->sgbAttributeFiles) {
156 mappedMemoryFree(video->renderer->sgbAttributeFiles, SGB_SIZE_ATF_RAM);
157 video->renderer->sgbAttributeFiles = NULL;
158 }
159 if (video->renderer->sgbAttributes) {
160 free(video->renderer->sgbAttributes);
161 video->renderer->sgbAttributes = NULL;
162 }
163}
164
165void GBVideoDummyRendererCreate(struct GBVideoRenderer* renderer) {
166 static const struct GBVideoRenderer dummyRenderer = {
167 .init = GBVideoDummyRendererInit,
168 .deinit = GBVideoDummyRendererDeinit,
169 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
170 .writeSGBPacket = GBVideoDummyRendererWriteSGBPacket,
171 .writeVRAM = GBVideoDummyRendererWriteVRAM,
172 .writeOAM = GBVideoDummyRendererWriteOAM,
173 .writePalette = GBVideoDummyRendererWritePalette,
174 .drawRange = GBVideoDummyRendererDrawRange,
175 .finishScanline = GBVideoDummyRendererFinishScanline,
176 .finishFrame = GBVideoDummyRendererFinishFrame,
177 .enableSGBBorder = GBVideoDummyRendererEnableSGBBorder,
178 .getPixels = GBVideoDummyRendererGetPixels,
179 .putPixels = GBVideoDummyRendererPutPixels,
180 };
181 memcpy(renderer, &dummyRenderer, sizeof(*renderer));
182}
183
184void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
185 if (video->renderer) {
186 video->renderer->deinit(video->renderer);
187 renderer->cache = video->renderer->cache;
188 renderer->sgbRenderMode = video->renderer->sgbRenderMode;
189 renderer->sgbCharRam = video->renderer->sgbCharRam;
190 renderer->sgbMapRam = video->renderer->sgbMapRam;
191 renderer->sgbPalRam = video->renderer->sgbPalRam;
192 renderer->sgbAttributeFiles = video->renderer->sgbAttributeFiles;
193 renderer->sgbAttributes = video->renderer->sgbAttributes;
194 } else {
195 renderer->cache = NULL;
196 renderer->sgbRenderMode = 0;
197 renderer->sgbCharRam = NULL;
198 renderer->sgbMapRam = NULL;
199 renderer->sgbPalRam = NULL;
200 renderer->sgbAttributeFiles = NULL;
201 renderer->sgbAttributes = NULL;
202 }
203 video->renderer = renderer;
204 renderer->vram = video->vram;
205 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
206}
207
208static bool _statIRQAsserted(GBRegisterSTAT stat) {
209 // TODO: variable for the IRQ line value?
210 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
211 return true;
212 }
213 switch (GBRegisterSTATGetMode(stat)) {
214 case 0:
215 if (GBRegisterSTATIsHblankIRQ(stat)) {
216 return true;
217 }
218 break;
219 case 1:
220 if (GBRegisterSTATIsVblankIRQ(stat)) {
221 return true;
222 }
223 break;
224 case 2:
225 if (GBRegisterSTATIsOAMIRQ(stat)) {
226 return true;
227 }
228 break;
229 case 3:
230 break;
231 }
232 return false;
233}
234
235void GBVideoSkipBIOS(struct GBVideo* video) {
236 video->mode = 1;
237 video->modeEvent.callback = _endMode1;
238
239 int32_t next;
240 if (video->p->model == GB_MODEL_CGB) {
241 video->ly = GB_VIDEO_VERTICAL_PIXELS;
242 video->p->memory.io[REG_LY] = video->ly;
243 video->stat = GBRegisterSTATClearLYC(video->stat);
244 next = 20;
245 } else {
246 video->ly = GB_VIDEO_VERTICAL_TOTAL_PIXELS;
247 video->p->memory.io[REG_LY] = 0;
248 next = 56;
249 }
250 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
251
252 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
253 GBUpdateIRQs(video->p);
254 video->p->memory.io[REG_STAT] = video->stat;
255 mTimingDeschedule(&video->p->timing, &video->modeEvent);
256 mTimingSchedule(&video->p->timing, &video->modeEvent, next);
257}
258
259void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
260 struct GBVideo* video = context;
261 if (video->frameskipCounter <= 0) {
262 video->renderer->finishScanline(video->renderer, video->ly);
263 }
264 int lyc = video->p->memory.io[REG_LYC];
265 int32_t next;
266 ++video->ly;
267 video->p->memory.io[REG_LY] = video->ly;
268 GBRegisterSTAT oldStat = video->stat;
269 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
270 next = GB_VIDEO_MODE_2_LENGTH;
271 video->mode = 2;
272 video->modeEvent.callback = _endMode2;
273 } else {
274 next = GB_VIDEO_HORIZONTAL_LENGTH;
275 video->mode = 1;
276 video->modeEvent.callback = _endMode1;
277
278 mTimingDeschedule(&video->p->timing, &video->frameEvent);
279 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
280
281 if (!_statIRQAsserted(oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
282 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
283 }
284 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
285 }
286 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
287 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
288 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
289 }
290
291 // LYC stat is delayed 1 T-cycle
292 oldStat = video->stat;
293 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
294 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
295 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
296 }
297
298 GBUpdateIRQs(video->p);
299 video->p->memory.io[REG_STAT] = video->stat;
300 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
301}
302
303void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
304 struct GBVideo* video = context;
305 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
306 return;
307 }
308 int lyc = video->p->memory.io[REG_LYC];
309 // TODO: One M-cycle delay
310 ++video->ly;
311 int32_t next;
312 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
313 video->ly = 0;
314 video->p->memory.io[REG_LY] = video->ly;
315 next = GB_VIDEO_MODE_2_LENGTH;
316 video->mode = 2;
317 video->modeEvent.callback = _endMode2;
318 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
319 video->p->memory.io[REG_LY] = 0;
320 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
321 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
322 video->p->memory.io[REG_LY] = video->ly;
323 next = 8;
324 } else {
325 video->p->memory.io[REG_LY] = video->ly;
326 next = GB_VIDEO_HORIZONTAL_LENGTH;
327 }
328
329 GBRegisterSTAT oldStat = video->stat;
330 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
331 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
332 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
333 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
334 GBUpdateIRQs(video->p);
335 }
336 video->p->memory.io[REG_STAT] = video->stat;
337 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
338}
339
340void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
341 struct GBVideo* video = context;
342 _cleanOAM(video, video->ly);
343 video->x = -(video->p->memory.io[REG_SCX] & 7);
344 video->dotClock = mTimingCurrentTime(timing) - cyclesLate + 5 - (video->x << video->p->doubleSpeed);
345 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - video->x;
346 video->mode = 3;
347 video->modeEvent.callback = _endMode3;
348 GBRegisterSTAT oldStat = video->stat;
349 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
350 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
351 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
352 GBUpdateIRQs(video->p);
353 }
354 video->p->memory.io[REG_STAT] = video->stat;
355 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
356}
357
358void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
359 struct GBVideo* video = context;
360 GBVideoProcessDots(video, cyclesLate);
361 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
362 video->p->memory.hdmaRemaining = 0x10;
363 video->p->cpuBlocked = true;
364 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
365 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
366 }
367 video->mode = 0;
368 video->modeEvent.callback = _endMode0;
369 GBRegisterSTAT oldStat = video->stat;
370 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
371 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
372 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
373 GBUpdateIRQs(video->p);
374 }
375 video->p->memory.io[REG_STAT] = video->stat;
376 // TODO: Cache SCX & 7 in case it changes
377 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
378 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
379}
380
381void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
382 UNUSED(cyclesLate);
383 struct GBVideo* video = context;
384 if (video->p->cpu->executionState != SM83_CORE_FETCH) {
385 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
386 return;
387 }
388 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
389 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
390 }
391
392 --video->frameskipCounter;
393 if (video->frameskipCounter < 0) {
394 video->renderer->finishFrame(video->renderer);
395 video->frameskipCounter = video->frameskip;
396 }
397 GBFrameEnded(video->p);
398 mCoreSyncPostFrame(video->p->sync);
399 ++video->frameCounter;
400 video->p->earlyExit = true;
401
402 GBFrameStarted(video->p);
403}
404
405static void _cleanOAM(struct GBVideo* video, int y) {
406 // TODO: GBC differences
407 // TODO: Optimize
408 video->objMax = 0;
409 int spriteHeight = 8;
410 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
411 spriteHeight = 16;
412 }
413 int o = 0;
414 int i;
415 for (i = 0; i < 40; ++i) {
416 uint8_t oy = video->oam.obj[i].y;
417 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
418 continue;
419 }
420 // TODO: Sort
421 video->objThisLine[o] = video->oam.obj[i];
422 ++o;
423 if (o == 10) {
424 break;
425 }
426 }
427 video->objMax = o;
428}
429
430void GBVideoProcessDots(struct GBVideo* video, uint32_t cyclesLate) {
431 if (video->mode != 3) {
432 return;
433 }
434 int oldX = video->x;
435 video->x = (int32_t) (mTimingCurrentTime(&video->p->timing) - cyclesLate - video->dotClock) >> video->p->doubleSpeed;
436 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
437 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
438 } else if (video->x < 0) {
439 return;
440 }
441 if (oldX < 0) {
442 oldX = 0;
443 }
444 if (video->frameskipCounter <= 0) {
445 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
446 }
447}
448
449void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
450 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
451 video->mode = 2;
452 video->modeEvent.callback = _endMode2;
453 int32_t next = GB_VIDEO_MODE_2_LENGTH - 5; // TODO: Why is this fudge factor needed? Might be related to T-cycles for load/store differing
454 mTimingDeschedule(&video->p->timing, &video->modeEvent);
455 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
456
457 video->ly = 0;
458 video->p->memory.io[REG_LY] = 0;
459 GBRegisterSTAT oldStat = video->stat;
460 video->stat = GBRegisterSTATSetMode(video->stat, 0);
461 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
462 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
463 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
464 GBUpdateIRQs(video->p);
465 }
466 video->p->memory.io[REG_STAT] = video->stat;
467 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
468
469 mTimingDeschedule(&video->p->timing, &video->frameEvent);
470 }
471 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
472 // TODO: Fix serialization; this gets internal and visible modes out of sync
473 video->mode = 0;
474 video->stat = GBRegisterSTATSetMode(video->stat, 0);
475 video->p->memory.io[REG_STAT] = video->stat;
476 video->ly = 0;
477 video->p->memory.io[REG_LY] = 0;
478 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
479
480 mTimingDeschedule(&video->p->timing, &video->modeEvent);
481 mTimingDeschedule(&video->p->timing, &video->frameEvent);
482 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
483 }
484 video->p->memory.io[REG_STAT] = video->stat;
485}
486
487void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
488 GBRegisterSTAT oldStat = video->stat;
489 video->stat = (video->stat & 0x7) | (value & 0x78);
490 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
491 return;
492 }
493 if (!_statIRQAsserted(oldStat) && video->mode < 3) {
494 // TODO: variable for the IRQ line value?
495 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
496 GBUpdateIRQs(video->p);
497 }
498}
499
500void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
501 GBRegisterSTAT oldStat = video->stat;
502 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
503 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
504 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
505 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
506 GBUpdateIRQs(video->p);
507 }
508 }
509 video->p->memory.io[REG_STAT] = video->stat;
510}
511
512void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
513 if (video->p->model < GB_MODEL_SGB) {
514 switch (address) {
515 case REG_BGP:
516 video->palette[0] = video->dmgPalette[value & 3];
517 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
518 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
519 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
520 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
521 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
522 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
523 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
524 break;
525 case REG_OBP0:
526 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
527 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
528 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
529 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
530 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
531 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
532 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
533 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
534 break;
535 case REG_OBP1:
536 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
537 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
538 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
539 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
540 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
541 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
542 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
543 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
544 break;
545 }
546 } else if (video->p->model & GB_MODEL_SGB) {
547 video->renderer->writeVideoRegister(video->renderer, address, value);
548 } else {
549 switch (address) {
550 case REG_BCPD:
551 if (video->mode != 3) {
552 if (video->bcpIndex & 1) {
553 video->palette[video->bcpIndex >> 1] &= 0x00FF;
554 video->palette[video->bcpIndex >> 1] |= value << 8;
555 } else {
556 video->palette[video->bcpIndex >> 1] &= 0xFF00;
557 video->palette[video->bcpIndex >> 1] |= value;
558 }
559 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
560 }
561 if (video->bcpIncrement) {
562 ++video->bcpIndex;
563 video->bcpIndex &= 0x3F;
564 video->p->memory.io[REG_BCPS] &= 0x80;
565 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
566 }
567 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
568 break;
569 case REG_OCPD:
570 if (video->mode != 3) {
571 if (video->ocpIndex & 1) {
572 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
573 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
574 } else {
575 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
576 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
577 }
578 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
579 }
580 if (video->ocpIncrement) {
581 ++video->ocpIndex;
582 video->ocpIndex &= 0x3F;
583 video->p->memory.io[REG_OCPS] &= 0x80;
584 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
585 }
586 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
587 break;
588 }
589 }
590}
591
592void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
593 value &= 1;
594 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
595 video->vramCurrentBank = value;
596}
597
598void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
599 if (index >= 12) {
600 return;
601 }
602 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
603}
604
605void GBVideoDisableCGB(struct GBVideo* video) {
606 video->dmgPalette[0] = video->palette[0];
607 video->dmgPalette[1] = video->palette[1];
608 video->dmgPalette[2] = video->palette[2];
609 video->dmgPalette[3] = video->palette[3];
610 video->dmgPalette[4] = video->palette[8 * 4 + 0];
611 video->dmgPalette[5] = video->palette[8 * 4 + 1];
612 video->dmgPalette[6] = video->palette[8 * 4 + 2];
613 video->dmgPalette[7] = video->palette[8 * 4 + 3];
614 video->dmgPalette[8] = video->palette[9 * 4 + 0];
615 video->dmgPalette[9] = video->palette[9 * 4 + 1];
616 video->dmgPalette[10] = video->palette[9 * 4 + 2];
617 video->dmgPalette[11] = video->palette[9 * 4 + 3];
618 video->renderer->deinit(video->renderer);
619 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
620}
621
622void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
623 int i;
624 if (!(video->sgbCommandHeader & 7)) {
625 video->sgbBufferIndex = 0;
626 if ((data[0] >> 3) > SGB_OBJ_TRN) {
627 video->sgbCommandHeader = 0;
628 return;
629 }
630 video->sgbCommandHeader = data[0];
631 }
632 --video->sgbCommandHeader;
633 memcpy(&video->sgbPacketBuffer[video->sgbBufferIndex << 4], data, 16);
634 ++video->sgbBufferIndex;
635 if (video->sgbCommandHeader & 7) {
636 return;
637 }
638 switch (video->sgbCommandHeader >> 3) {
639 case SGB_PAL01:
640 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
641 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
642 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
643 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
644
645 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
646 video->palette[5] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
647 video->palette[6] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
648 video->palette[7] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
649
650 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
651 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
652
653 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
654 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
655 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
656 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
657 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
658 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
659 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
660 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
661 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
662 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
663 break;
664 case SGB_PAL23:
665 video->palette[9] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
666 video->palette[10] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
667 video->palette[11] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
668
669 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
670 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
671 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
672 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
673 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
674 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
675 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
676 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
677 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
678 break;
679 case SGB_PAL03:
680 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
681 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
682 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
683 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
684
685 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
686 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
687
688 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
689 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
690 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
691 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
692 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
693 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
694 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
695 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
696 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
697 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
698 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
699 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
700 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
701 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
702 break;
703 case SGB_PAL12:
704 video->palette[5] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
705 video->palette[6] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
706 video->palette[7] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
707
708 video->palette[9] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
709 video->palette[10] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
710 video->palette[11] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
711 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
712 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
713 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
714 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
715 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
716 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
717 break;
718 case SGB_PAL_SET:
719 for (i = 0; i < 4; ++i) {
720 uint16_t entry = (video->sgbPacketBuffer[2 + (i * 2)] << 8) | video->sgbPacketBuffer[1 + (i * 2)];
721 if (entry >= 0x200) {
722 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
723 continue;
724 }
725 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
726 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[i * 4 + 0]);
727 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
728 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
729 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
730 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
731 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
732 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
733 }
734 break;
735 case SGB_ATTR_BLK:
736 case SGB_ATTR_DIV:
737 case SGB_ATTR_CHR:
738 case SGB_ATTR_LIN:
739 case SGB_PAL_TRN:
740 case SGB_ATRC_EN:
741 case SGB_CHR_TRN:
742 case SGB_PCT_TRN:
743 case SGB_ATTR_TRN:
744 case SGB_ATTR_SET:
745 break;
746 case SGB_MLT_REQ:
747 if ((video->sgbPacketBuffer[1] & 0x3) == 2) { // XXX: This unmasked increment appears to be an SGB hardware bug
748 ++video->p->sgbCurrentController;
749 }
750 video->p->sgbControllers = video->sgbPacketBuffer[1] & 0x3;
751 video->p->sgbCurrentController &= video->p->sgbControllers;
752 return;
753 case SGB_MASK_EN:
754 video->renderer->sgbRenderMode = video->sgbPacketBuffer[1] & 0x3;
755 break;
756 default:
757 mLOG(GB, STUB, "Unimplemented SGB command: %02X", video->sgbPacketBuffer[0] >> 3);
758 return;
759 }
760 video->renderer->writeSGBPacket(video->renderer, video->sgbPacketBuffer);
761}
762
763static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
764 UNUSED(renderer);
765 UNUSED(model);
766 UNUSED(borders);
767 // Nothing to do
768}
769
770static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
771 UNUSED(renderer);
772 // Nothing to do
773}
774
775static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
776 if (renderer->cache) {
777 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
778 }
779 return value;
780}
781
782static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
783 UNUSED(renderer);
784 UNUSED(data);
785}
786
787static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
788 if (renderer->cache) {
789 mCacheSetWriteVRAM(renderer->cache, address);
790 }
791}
792
793static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
794 UNUSED(renderer);
795 UNUSED(oam);
796 // Nothing to do
797}
798
799static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
800 if (renderer->cache) {
801 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
802 }
803}
804
805static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
806 UNUSED(renderer);
807 UNUSED(endX);
808 UNUSED(startX);
809 UNUSED(y);
810 UNUSED(obj);
811 UNUSED(oamMax);
812 // Nothing to do
813}
814
815static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
816 UNUSED(renderer);
817 UNUSED(y);
818 // Nothing to do
819}
820
821static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
822 UNUSED(renderer);
823 // Nothing to do
824}
825
826static void GBVideoDummyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable) {
827 UNUSED(renderer);
828 UNUSED(enable);
829 // Nothing to do
830}
831
832static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
833 UNUSED(renderer);
834 UNUSED(stride);
835 UNUSED(pixels);
836 // Nothing to do
837}
838
839static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
840 UNUSED(renderer);
841 UNUSED(stride);
842 UNUSED(pixels);
843 // Nothing to do
844}
845
846void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
847 STORE_16LE(video->x, 0, &state->video.x);
848 STORE_16LE(video->ly, 0, &state->video.ly);
849 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
850 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
851 state->video.vramCurrentBank = video->vramCurrentBank;
852
853 GBSerializedVideoFlags flags = 0;
854 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
855 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
856 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
857 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
858 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
859 state->video.flags = flags;
860 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
861 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
862
863 size_t i;
864 for (i = 0; i < 64; ++i) {
865 STORE_16LE(video->palette[i], i * 2, state->video.palette);
866 }
867
868 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
869 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
870
871 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
872 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
873}
874
875void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
876 LOAD_16LE(video->x, 0, &state->video.x);
877 LOAD_16LE(video->ly, 0, &state->video.ly);
878 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
879 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
880 video->vramCurrentBank = state->video.vramCurrentBank;
881
882 GBSerializedVideoFlags flags = state->video.flags;
883 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
884 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
885 video->mode = GBSerializedVideoFlagsGetMode(flags);
886 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
887 video->bcpIndex &= 0x3F;
888 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
889 video->ocpIndex &= 0x3F;
890
891 switch (video->mode) {
892 case 0:
893 video->modeEvent.callback = _endMode0;
894 break;
895 case 1:
896 video->modeEvent.callback = _endMode1;
897 break;
898 case 2:
899 video->modeEvent.callback = _endMode2;
900 break;
901 case 3:
902 video->modeEvent.callback = _endMode3;
903 break;
904 }
905
906 uint32_t when;
907 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
908 LOAD_32LE(when, 0, &state->video.nextMode);
909 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
910 }
911 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
912 LOAD_32LE(when, 0, &state->video.nextFrame);
913 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
914 }
915
916 video->renderer->deinit(video->renderer);
917 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
918
919 size_t i;
920 for (i = 0; i < 64; ++i) {
921 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
922 video->renderer->writePalette(video->renderer, i, video->palette[i]);
923 }
924
925 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
926 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
927
928 _cleanOAM(video, video->ly);
929 GBVideoSwitchBank(video, video->vramCurrentBank);
930}