public Renderer(PPU ppu, FrameSink destination, long offset)
{
fs = destination;
PPU = ppu;
ppu.Mode = Mode.OAMSearch;
fetcher = new PixelFetcher(PPU);
TimeUntilWhichToPause += offset;
}
public PPU(Action enableVBlankInterrupt, Action enableLCDCStatusInterrupt, FrameSink frameSink)
{
OAM = new OAM();
VRAM = new VRAM();
EnableVBlankInterrupt = enableVBlankInterrupt;
EnableLCDCStatusInterrupt = enableLCDCStatusInterrupt;
Writer = frameSink;
}
public Core(byte[] gameROM, byte[]?bootROM, Keypad Keypad, FrameSink frameSink)
{
if (gameROM.Length < 0x8000)
{
throw new Exception("Cartridge file has to be at least 8kb in size");
}
PC = new();
InterruptRegisters = new InterruptRegisters();
Keypad.Input.KeyWentDown += InterruptRegisters.TriggerEvent;
APU = new APU(32768);
PPU = new PPU(InterruptRegisters.EnableVBlankInterrupt, InterruptRegisters.EnableLCDSTATInterrupt, frameSink);
Timers = new Timers(InterruptRegisters.EnableTimerInterrupt);
var ioRegisters = SetupControlRegisters(Keypad);
CartHeader Header = new CartHeader(gameROM);
MBC Card;
if (Header.HasBattery())
{
var mmf = Header.MakeMemoryMappedFile();
Card = Header.HasClock() ? Header.MakeMBC(gameROM, mmf, () => masterclock) : Header.MakeMBC(gameROM, mmf);
}
else
{
Card = Header.MakeMBC(gameROM);
}
//Writing out the RTC too often would be very heavy. This writes it out once per frame.
//
if (Header.Type == CartType.MBC3_TIMER_RAM_BATTERY)
{
var SaveRTC = ((MBC3)Card).SaveRTC();
void h(object?x, EventArgs y) => SaveRTC();
frameSink.FramePushed += h;
}
if (Card is MBC5WithRumble rumble)
{
rumble.RumbleStateChange += Keypad.ToggleRumble;
}
Memory = new MMU(
bootROM,
Card,
PPU.VRAM,
PPU.OAM,
ioRegisters,
(x => InterruptRegisters.InterruptControlRegister = x,
() => InterruptRegisters.InterruptControlRegister),
PC
);
CPU = new CPU(Memory, InterruptRegisters, PC);
ioRegisters[0x0f] = InterruptRegisters.HookUp();
ioRegisters[0x50] = Memory.HookUpMemory();
//We have to replicate the state of the system post boot without running the bootrom
if (bootROM == null)
{
//registers
CPU.SetStateWithoutBootrom();
//timers
Timers.SetStateWithoutBootrom();
//sound
APU.SetStateWithoutBootrom();
//graphics TODO: we can't really set up the graphics environment correctly
//because we will have to also initialize the internal renderer state correctly
PPU.SetStateWithoutBootrom();
InterruptRegisters.SetStateWithoutBootrom();
}
}
