void GBVideoReset(struct GBVideo* video) {
video->ly = 0;
video->mode = 1;
video->stat = 1;
video->nextEvent = INT_MAX;
video->eventDiff = 0;
video->nextMode = INT_MAX;
video->dotCounter = INT_MIN;
video->nextFrame = INT_MAX;
video->frameCounter = 0;
video->frameskipCounter = 0;
if (video->vram) {
mappedMemoryFree(video->vram, GB_SIZE_VRAM);
}
video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
GBVideoSwitchBank(video, 0);
video->renderer->vram = video->vram;
memset(&video->oam, 0, sizeof(video->oam));
video->renderer->oam = &video->oam;
memset(&video->palette, 0, sizeof(video->palette));
video->renderer->deinit(video->renderer);
video->renderer->init(video->renderer, video->p->model);
}
void GBVideoReset(struct GBVideo* video) {
video->ly = 0;
video->x = 0;
video->mode = 1;
video->stat = 1;
video->frameCounter = 0;
video->frameskipCounter = 0;
GBVideoSwitchBank(video, 0);
video->renderer->vram = video->vram;
memset(&video->oam, 0, sizeof(video->oam));
video->renderer->oam = &video->oam;
memset(&video->palette, 0, sizeof(video->palette));
if (video->p->model & GB_MODEL_SGB) {
video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
video->renderer->sgbAttributes = malloc(90 * 45);
memset(video->renderer->sgbAttributes, 0, 90 * 45);
video->sgbCommandHeader = 0;
video->sgbBufferIndex = 0;
}
video->palette[0] = video->dmgPalette[0];
video->palette[1] = video->dmgPalette[1];
video->palette[2] = video->dmgPalette[2];
video->palette[3] = video->dmgPalette[3];
video->palette[8 * 4 + 0] = video->dmgPalette[4];
video->palette[8 * 4 + 1] = video->dmgPalette[5];
video->palette[8 * 4 + 2] = video->dmgPalette[6];
video->palette[8 * 4 + 3] = video->dmgPalette[7];
video->palette[9 * 4 + 0] = video->dmgPalette[8];
video->palette[9 * 4 + 1] = video->dmgPalette[9];
video->palette[9 * 4 + 2] = video->dmgPalette[10];
video->palette[9 * 4 + 3] = video->dmgPalette[11];
video->renderer->deinit(video->renderer);
video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
video->renderer->writePalette(video->renderer, 0, video->palette[0]);
video->renderer->writePalette(video->renderer, 1, video->palette[1]);
video->renderer->writePalette(video->renderer, 2, video->palette[2]);
video->renderer->writePalette(video->renderer, 3, video->palette[3]);
video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
}
void GBIOWrite(struct GB* gb, unsigned address, uint8_t value) {
switch (address) {
case REG_DIV:
GBTimerDivReset(&gb->timer);
return;
case REG_NR10:
if (gb->audio.enable) {
GBAudioWriteNR10(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR11:
if (gb->audio.enable) {
GBAudioWriteNR11(&gb->audio, value);
} else {
if (gb->audio.style == GB_AUDIO_DMG) {
GBAudioWriteNR11(&gb->audio, value & _registerMask[REG_NR11]);
}
value = 0;
}
break;
case REG_NR12:
if (gb->audio.enable) {
GBAudioWriteNR12(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR13:
if (gb->audio.enable) {
GBAudioWriteNR13(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR14:
if (gb->audio.enable) {
GBAudioWriteNR14(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR21:
if (gb->audio.enable) {
GBAudioWriteNR21(&gb->audio, value);
} else {
if (gb->audio.style == GB_AUDIO_DMG) {
GBAudioWriteNR21(&gb->audio, value & _registerMask[REG_NR21]);
}
value = 0;
}
break;
case REG_NR22:
if (gb->audio.enable) {
GBAudioWriteNR22(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR23:
if (gb->audio.enable) {
GBAudioWriteNR23(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR24:
if (gb->audio.enable) {
GBAudioWriteNR24(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR30:
if (gb->audio.enable) {
GBAudioWriteNR30(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR31:
if (gb->audio.enable || gb->audio.style == GB_AUDIO_DMG) {
GBAudioWriteNR31(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR32:
if (gb->audio.enable) {
GBAudioWriteNR32(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR33:
if (gb->audio.enable) {
GBAudioWriteNR33(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR34:
if (gb->audio.enable) {
GBAudioWriteNR34(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR41:
if (gb->audio.enable || gb->audio.style == GB_AUDIO_DMG) {
GBAudioWriteNR41(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR42:
if (gb->audio.enable) {
GBAudioWriteNR42(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR43:
if (gb->audio.enable) {
GBAudioWriteNR43(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR44:
if (gb->audio.enable) {
GBAudioWriteNR44(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR50:
if (gb->audio.enable) {
GBAudioWriteNR50(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR51:
if (gb->audio.enable) {
GBAudioWriteNR51(&gb->audio, value);
} else {
value = 0;
}
break;
case REG_NR52:
GBAudioWriteNR52(&gb->audio, value);
value &= 0x80;
value |= gb->memory.io[REG_NR52] & 0x0F;
break;
case REG_WAVE_0:
case REG_WAVE_1:
case REG_WAVE_2:
case REG_WAVE_3:
case REG_WAVE_4:
case REG_WAVE_5:
case REG_WAVE_6:
case REG_WAVE_7:
case REG_WAVE_8:
case REG_WAVE_9:
case REG_WAVE_A:
case REG_WAVE_B:
case REG_WAVE_C:
case REG_WAVE_D:
case REG_WAVE_E:
case REG_WAVE_F:
if (!gb->audio.playingCh3 || gb->audio.style != GB_AUDIO_DMG) {
gb->audio.ch3.wavedata8[address - REG_WAVE_0] = value;
} else if(gb->audio.ch3.readable) {
gb->audio.ch3.wavedata8[gb->audio.ch3.window >> 1] = value;
}
break;
case REG_JOYP:
case REG_TIMA:
case REG_TMA:
case REG_LYC:
// Handled transparently by the registers
break;
case REG_TAC:
value = GBTimerUpdateTAC(&gb->timer, value);
break;
case REG_IF:
gb->memory.io[REG_IF] = value | 0xE0;
GBUpdateIRQs(gb);
return;
case REG_LCDC:
// TODO: handle GBC differences
value = gb->video.renderer->writeVideoRegister(gb->video.renderer, address, value);
GBVideoWriteLCDC(&gb->video, value);
break;
case REG_DMA:
GBMemoryDMA(gb, value << 8);
break;
case REG_SCY:
case REG_SCX:
case REG_WY:
case REG_WX:
GBVideoProcessDots(&gb->video);
value = gb->video.renderer->writeVideoRegister(gb->video.renderer, address, value);
break;
case REG_BGP:
case REG_OBP0:
case REG_OBP1:
GBVideoProcessDots(&gb->video);
GBVideoWritePalette(&gb->video, address, value);
break;
case REG_STAT:
GBVideoWriteSTAT(&gb->video, value);
break;
case REG_IE:
gb->memory.ie = value;
GBUpdateIRQs(gb);
return;
default:
if (gb->model >= GB_MODEL_CGB) {
switch (address) {
case REG_KEY1:
value &= 0x1;
value |= gb->memory.io[address] & 0x80;
break;
case REG_VBK:
GBVideoSwitchBank(&gb->video, value);
break;
case REG_HDMA1:
case REG_HDMA2:
case REG_HDMA3:
case REG_HDMA4:
// Handled transparently by the registers
break;
case REG_HDMA5:
GBMemoryWriteHDMA5(gb, value);
value &= 0x7F;
break;
case REG_BCPS:
gb->video.bcpIndex = value & 0x3F;
gb->video.bcpIncrement = value & 0x80;
gb->memory.io[REG_BCPD] = gb->video.palette[gb->video.bcpIndex >> 1] >> (8 * (gb->video.bcpIndex & 1));
break;
case REG_BCPD:
GBVideoProcessDots(&gb->video);
GBVideoWritePalette(&gb->video, address, value);
break;
case REG_OCPS:
gb->video.ocpIndex = value & 0x3F;
gb->video.ocpIncrement = value & 0x80;
gb->memory.io[REG_OCPD] = gb->video.palette[8 * 4 + (gb->video.ocpIndex >> 1)] >> (8 * (gb->video.ocpIndex & 1));
break;
case REG_OCPD:
GBVideoProcessDots(&gb->video);
GBVideoWritePalette(&gb->video, address, value);
break;
case REG_SVBK:
GBMemorySwitchWramBank(&gb->memory, value);
value = gb->memory.wramCurrentBank;
break;
default:
goto failed;
}
goto success;
}
failed:
mLOG(GB_IO, STUB, "Writing to unknown register FF%02X:%02X", address, value);
if (address >= GB_SIZE_IO) {
return;
}
break;
}
