/// <summary>
/// Public Constructor for the Engine
/// </summary>
/// <param name="fileName">The full path of a .nes cartridge file</param>
public Engine(string fileName)
{
_cartridgeModel = CartridgeLoaderUtility.LoadCartridge(fileName);
Processor = _cartridgeModel.GetProcessor();
PictureProcessingUnit = new PPU(_cartridgeModel, Processor);
}
/// <summary>
/// Gets a new instance of the 6502 Processor
/// </summary>
/// <param name="cartridgeModel">The cartridge to load. </param>
/// <param name="programCounter">The initial Program Counter</param>
/// <returns>A Processor Object</returns>
internal static CPU GetProcessor(this CartridgeModel cartridgeModel, int programCounter)
{
var initialProgram = GetInitialProgram(cartridgeModel);
var cpu = new CPU();
cpu.LoadProgram(0x8000, initialProgram, programCounter);
return cpu;
}
/// <summary>
/// Public Constructor for the Engine
/// </summary>
/// <param name="rawBytes">The raw bytes from a .net cartridge file</param>
public Engine(byte[] rawBytes)
{
_cartridgeModel = CartridgeLoaderUtility.LoadCartridge(rawBytes);
Processor = _cartridgeModel.GetProcessor();
PictureProcessingUnit = new PPU(_cartridgeModel, Processor);
}
/// <summary>
/// Constructor for the PPU
/// </summary>
/// <param name="cartridgeModel"></param>
/// <param name="cpu"></param>
internal PictureProcessingUnit(CartridgeModel cartridgeModel, CPU cpu)
{
_cpu = cpu;
_cpu.CycleCountIncrementedAction = CPUCycleCountIncremented;
_cpu.ReadMemoryAction = ReadMemoryAction;
_cpu.WriteMemoryAction = WriteMemoryAction;
LoadInitialMemory(cartridgeModel);
OnNewFrameAction = () => { };
ScanLine = 241;
CycleCount = 0;
_isRenderingDisabled = true;
CurrentFrame = new byte[195840];
_newFrame = new byte[195840];
}
