internal MMC3Mapper(IImageReader reader, IMemoryBus cpuBus, IMemoryBus ppuBus, IProcessorInterrupt irq)
: base(reader, cpuBus, ppuBus)
{
if (this.Reader.PrgRamSize > MMC3Mapper.PrgRamMaxSize)
{
throw new ArgumentOutOfRangeException("MMC3 supports a maximum of 8KB of PRG RAM");
}
if (this.Reader.PrgRomSize > MMC3Mapper.PrgRomMaxSize)
{
throw new ArgumentOutOfRangeException("MMC3 supports a maximum of 512KB of PRG ROM");
}
if (this.Reader.ChrRomSize > MMC3Mapper.ChrRomMaxSize)
{
throw new ArgumentOutOfRangeException("MMC3 supports a maximum of 256KB of CHR ROM");
}
this.irq = irq;
// Initialize ROM
int prgRomSize = this.Reader.PrgRomSize;
int prgRamSize = (this.Reader.PrgRamSize != 0) ? this.Reader.PrgRamSize : 0x2000;
int chrRomSize = (this.Reader.ChrRomSize != 0) ? this.Reader.ChrRomSize : 0x2000;
this.prgRomBanks = this.Reader.PrgRomSize / MMC3Mapper.PrgRomBankSize;
this.chrRomBanks = (this.Reader.ChrRomSize != 0) ? (this.Reader.ChrRomSize / MMC3Mapper.ChrRomBankSize) : 8;
this.prgRam = new byte[prgRamSize];
this.prgRom = new byte[prgRomSize];
this.chrRom = new byte[chrRomSize];
// Read PRG ROM
this.Reader.GetPrgRom(0, this.prgRom, 0, prgRomSize);
if (this.Reader.ChrRomSize != 0)
{
// Read CHR ROM
this.Reader.GetChrRom(0, this.chrRom, 0, chrRomSize);
}
// 8K bank of PRG RAM at CPU 0x6000
this.MapCpuRange(this, 0x6000, 0x7FFF);
// 2 16K banks of PRG ROM at CPU 0x8000 and 0xC000
this.MapCpuRange(this, 0x8000, 0xFFFF);
// 2 2K banks and 4 1K banks of CHR ROM between PPU 0x0000 and 0x1000
this.MapPpuRange(this, 0x0000, 0x1FFF);
// Initial state is undefined, except that the last bank of PRG ROM will be mapped from 0xE000 - 0xFFFF
this.prgRomBank3Mask = (UInt32)(this.prgRomBanks - 1) << 13;
// Set initial nametable mirroring from ROM data as a hack to fix some homebrew that doesn't properly
// initialize the mapper
base.SetNametableMirroring(this.Reader.Mirroring);
}
internal NesApu(IMemoryBus cpuBus, IProcessorCore cpu)
{
this.cpuIrq = cpu.GetInterruptByName("IRQ");
this.pulse1 = new PulseChannel(true);
this.pulse2 = new PulseChannel(false);
this.triangle = new TriangleChannel();
this.noise = new NoiseChannel();
this.dmc = new DeltaChannel(cpuBus, cpuIrq);
this.isApuCycle = false;
this.buffer = new byte[NesApu.BUFFER_SIZE];
this.ptr = Marshal.AllocHGlobal(4);
}
internal Ricoh2C02(IProcessorCore cpu, IMemoryBus cpuBus, IMemoryBus ppuBus)
{
this.ppuBus = ppuBus;
this.vbi = cpu.GetInterruptByName("NMI");
this.vbiTimer = new Stopwatch();
this.paletteMemory = new byte[0x20];
this.primaryOam = new byte[0x100];
this.secondaryOam = new byte[0x20];
// PPU registers on CPU bus
cpuBus.RegisterMappedDevice(this, 0x2000, 0x2007);
// Palette data
ppuBus.RegisterMappedDevice(this, 0x3F00, 0x3F1F);
// Set up power-on state
this.SetPpuCtrl(0x00);
this.SetPpuMask(0x00);
this.SetOamAddr(0x00);
this.spriteZeroHit = false;
this.spriteOverflow = false;
this.isVBlank = false;
this.oddFrame = false;
this.scanline = -1;
this.cycle = 0;
this.registers = new ReadOnlyCollection <IRegister>(
new IRegister[] {
new RegisterWrapper("scanline", "PPU Scanline", 16, () => this.scanline, s => this.scanline = s),
new RegisterWrapper("cycle", "PPU Cycle", 16, () => this.cycle, c => this.cycle = c)
});
//this.vbiTimer.Start();
}
IMapper IMapperFactory.CreateInstance(IImageReader reader, IMemoryBus cpuBus, IMemoryBus ppuBus, IProcessorInterrupt irq)
{
return(new AxROMMapper(reader, cpuBus, ppuBus));
}
internal NesRomLoader(IMemoryBus cpuBus, IMemoryBus ppuBus, IProcessorInterrupt irq)
{
this.cpuBus = cpuBus;
this.ppuBus = ppuBus;
this.irq = irq;
}
IMapper IMapperFactory.CreateInstance(IImageReader reader, IMemoryBus cpuBus, IMemoryBus ppuBus, IProcessorInterrupt irq)
{
return(new UxROMMapper(reader, cpuBus, ppuBus, UxRomVariant.Camerica71));
}
internal DeltaChannel(IMemoryBus cpuBus, IProcessorInterrupt irq)
{
this.cpuBus = cpuBus;
this.dmcInterrupt = irq;
}
