public void Render()
{
//Increment mode and set lock states
if (ScheduledModeChange is not null)
{
PPU.Mode = (Mode)ScheduledModeChange;
ScheduledModeChange = null;
if (PPU.Mode == Mode.OAMSearch)
{
PPU.OAM.Locked = true;
PPU.VRAM.Locked = false;
}
if (PPU.Mode == Mode.Transfer)
{
PPU.OAM.Locked = true;
PPU.VRAM.Locked = true;
}
if (PPU.Mode == Mode.HBlank)
{
PPU.OAM.Locked = false;
PPU.VRAM.Locked = false;
}
if (PPU.Mode == Mode.VBlank)
{
PPU.OAM.Locked = false;
PPU.VRAM.Locked = false;
//According to TCAGBD the OAM flag is also triggering on this
if (PPU.Enable_VBlankInterrupt || PPU.Enable_OAM_Interrupt)
{
PPU.EnableLCDCStatusInterrupt();
}
PPU.EnableVBlankInterrupt();
fs.Draw();
}
}
//We should be handling this during the transition from HBlank to OAMSearch
if (PPU.Mode is Mode.OAMSearch or Mode.VBlank)
{
//We only want to increment the line register if we aren't on the very first line
if (!SkippingLYIncrementBecauseStartingLineOne)
{
PPU.LY++;
}
else
{
SkippingLYIncrementBecauseStartingLineOne = false;
}
if (PPU.LY == PPU.LYC)
{
PPU.LYCInterrupt = true;
}
if (PPU.LY == 154)
{
PPU.LY = 0;
fetcher.FrameFinished();
ScheduledModeChange = Mode.OAMSearch;
SkippingLYIncrementBecauseStartingLineOne = true;
return;
}
}
ExecuteModeTick();
}
