public DisplayStatusRegister(GameboyAdvance gba, LcdController lcd)
{
this.lcd = lcd;
DispStatRegister r0 = new DispStatRegister(lcd, this, gba.Memory, 0x4000004);
MemoryRegister8 r1 = new MemoryRegister8(gba.Memory, 0x4000005, true, true);
register = new MemoryRegister16(gba.Memory, 0x4000004, true, true, r0, r1);
}
public Window(GameboyAdvance gba, UInt32 rightRegisterAddress, UInt32 registerAddress)
{
this.gba = gba;
if (rightRegisterAddress != 0)
{
Right = new MemoryRegister8(gba.Memory, rightRegisterAddress, false, true);
Left = new MemoryRegister8(gba.Memory, rightRegisterAddress + 1, false, true);
Bottom = new MemoryRegister8(gba.Memory, rightRegisterAddress + 4, false, true);
Top = new MemoryRegister8(gba.Memory, rightRegisterAddress + 5, false, true);
}
Register = new MemoryRegister8(gba.Memory, registerAddress, true, true);
}
public LcdController(GameboyAdvance gba)
{
this.gba = gba;
frameBuffer0 = new DirectBitmap(Screen_X_Resolution, Screen_Y_Resolution);
frameBuffer1 = new DirectBitmap(Screen_X_Resolution, Screen_Y_Resolution);
FrameBuffer = frameBuffer0;
drawBuffer = frameBuffer1;
this.Palettes = new Palettes();
DisplayControlRegister = new DisplayControlRegister(gba, this);
DispStatRegister = new DisplayStatusRegister(gba, this);
Bg = new Background[4];
UInt32 scrollBaseAddress = 0x4000010;
for (int i = 0; i < 4; i++)
{
BgControlRegister cntReg = new BgControlRegister(gba, this, i, (UInt32) (0x4000008 + (i * 2)));
MemoryRegister16 scrollXReg = new MemoryRegister16(gba.Memory, scrollBaseAddress, false, true, 0x01);
MemoryRegister16 scrollYReg = new MemoryRegister16(gba.Memory, scrollBaseAddress + 2, false, true, 0x01);
Bg[i] = new Background(gba, i, cntReg, scrollXReg, scrollYReg);
scrollBaseAddress += 4;
}
VCount = new MemoryRegister8(gba.Memory, 0x04000006, true, false);
this.ObjController = new ObjController(gba);
Windows = new Window[4];
Windows[0] = new Window(gba, 0x4000040, 0x4000048);
Windows[1] = new Window(gba, 0x4000042, 0x4000049);
Windows[2] = new Window(gba, 0, 0x400004A);
Windows[3] = new Window(gba, 0, 0x400004B);
this.BlendControlRegister = new BlendControlRegister(this, gba);
BlendingCoefficientRegister = new PixelCoefficientRegister(this, gba, 0x4000052);
BrightnessCoefficientRegister = new PixelCoefficientRegister(this, gba, 0x4000054);
#if THREADED_SCANLINE
//Interlocked.Exchange(ref drawScanline, 0);
drawScanline = 0;
exitThread = false;
scanlineThread = new Thread(new ThreadStart(ScanlineThread));
scanlineThread.Priority = ThreadPriority.Highest;
scanlineThread.Start();
#endif
}
public MemoryRegister16(Memory memory, UInt32 address, bool readable, bool writeable)
{
LowByte = new MemoryRegister8(memory, address, readable, writeable);
HighByte = new MemoryRegister8(memory, address + 1, readable, writeable);
if (readable)
{
memory.IoRegisters16Read.Add(address, this);
}
if (writeable)
{
memory.IoRegisters16Write.Add(address, this);
}
}
public DisplayControlRegister(GameboyAdvance gba, LcdController lcd)
{
this.lcd = lcd;
MemoryRegister8WithSetHook r0 = new MemoryRegister8WithSetHook(gba.Memory, 0x4000000, true, true);
MemoryRegister8 r1 = new MemoryRegister8(gba.Memory, 0x4000001, true, true);
register = new MemoryRegister16(gba.Memory, 0x4000000, true, true, r0, r1);
r0.OnSet = (oldValue, newValue) =>
{
// BgMode changed?
if ((oldValue & 0x07) != (newValue & 0x07))
{
lcd.Bg[0].CacheRenderData();
lcd.Bg[1].CacheRenderData();
lcd.Bg[2].CacheRenderData();
lcd.Bg[3].CacheRenderData();
}
};
}
public GbaTimer(Timers timers, GameboyAdvance gba, int timerNumber)
{
this.timers = timers;
this.gba = gba;
this.timerNumber = timerNumber;
FiresOnCycle = 0xFFFFFFFF;
UInt32 baseAddr = (UInt32)(0x4000100 + (timerNumber * 4));
TimerValueRegister r0 = new TimerValueRegister(gba, this, gba.Memory, baseAddr);
TimerValueRegister r1 = new TimerValueRegister(gba, this, gba.Memory, baseAddr + 1);
TimerValueRegister = new MemoryRegister16(gba.Memory, baseAddr, true, false, r0, r1);
ReloadValue = new MemoryRegister16(gba.Memory, baseAddr, false, true);
baseAddr = (UInt32)(0x4000102 + (timerNumber * 4));
MemoryRegister8WithSetHook reg = new MemoryRegister8WithSetHook(gba.Memory, baseAddr, true, true);
MemoryRegister8 unused = new MemoryRegister8(gba.Memory, baseAddr + 1, true, true);
TimerControlRegister = new MemoryRegister16(gba.Memory, baseAddr, true, true, reg, unused);
reg.OnSet = (oldValue, newValue) =>
{
CalculateWhichCycleTheTimerWillFire();
timers.CalculateWhenToNextUpdate();
// When a timer is enabled, it reloads it's starting value. When it is disabled it just maintains its current values
bool wasEnabled = ((oldValue & 0x80) != 0);
bool enabled = ((newValue & 0x80) != 0);
if (wasEnabled == false && enabled)
{
startCycle = gba.Cpu.Cycles;
timers.ScheduledUpdate();
TimerValue = ReloadValue.Value;
}
};
}
public DmaControlRegister(GameboyAdvance gba, DmaChannel channel, UInt32 address)
{
this.channel = channel;
MemoryRegister8 r0 = new MemoryRegister8(gba.Memory, address, true, true);
MemoryRegister8WithSetHook r1 = new MemoryRegister8WithSetHook(gba.Memory, address + 1, true, true);
register = new MemoryRegister16(gba.Memory, address, true, true, r0, r1);
r1.OnSet = (oldValue, newValue) =>
{
bool oldEnable = ((oldValue & 0x80) != 0);
bool newEnable = ((newValue & 0x80) != 0);
if (oldEnable == false && newEnable == true)
{
// Dma transfers take 2 cycles to start
channel.DelayTransfer = 2;
channel.ScheduledUpdateOnCycle = gba.Cpu.Cycles + 2;
gba.Scheduler.RefreshSchedule();
}
};
}
