private ICentralProcessingUnit BuildCPU(IArithmeticLogicUnit alu, IMemoryManagementUnit mmu, ISystemBridge bridge)
{
IInstructionConfigurator configurator = new InstructionConfigurator(bridge);
IInstructionParser parser = new InstructionParser(configurator);
InstructionReader reader = new InstructionReader(mmu, alu.IP);
ICentralProcessingUnit cpu = new CentralProcessingUnit(alu, parser, reader);
return(cpu);
}
public SystemBridge(IMemoryManagementUnit mmu, IArithmeticLogicUnit alu, IDisplay display, IKeyboard keyboard)
{
_mmu = mmu;
_alu = alu;
_display = display;
_keyboard = keyboard;
// TODO: calculate according to display settings?
_spriteBuffer = new Byte[MaxSpriteSize];
}
public IChip8Device Build(IKeyboard keyboard, IDisplay display)
{
IArithmeticLogicUnit alu = BuildALU();
IMemoryManagementUnit mmu = new MemoryManagementUnit();
ISystemBridge systemBridge = BuildBridge(mmu, alu, display, keyboard);
ICentralProcessingUnit cpu = BuildCPU(alu, mmu, systemBridge);
Chip8Device device = new Chip8Device(cpu, mmu, systemBridge, keyboard, display);
LoadFonts(mmu, Fontset, FontOffset);
return(device);
}
/// <summary>
/// Initializes a new instance of the <see cref="Computer"/> class.
/// </summary>
/// <param name="stack">The stack.</param>
/// <param name="encoder">The instruction encoder.</param>
/// <param name="decoder">The instruction decoder.</param>
public ExecutionUnit(IStack stack, IEncoder encoder, IDecoder decoder, IArithmeticLogicUnit alu)
{
_context = new ExecutionContext
{
Stack = stack,
Encoder = encoder,
Decoder = decoder,
Alu = alu,
Executing = true
};
_dispatcher = new Dictionary<InstructionType, Action<ExecutionContext, Instruction>>
{
{ InstructionType.Mult, Multiply.GetAction() },
{ InstructionType.Call, Call.GetAction() },
{ InstructionType.Ret, Return.GetAction() },
{ InstructionType.Stop, Stop.GetAction() },
{ InstructionType.Print, Print.GetAction() },
{ InstructionType.Push, Push.GetAction() }
};
}
public CentralProcessingUnit(IArithmeticLogicUnit arithmeticLogicUnit, IInstructionParser parser, IInstructionReader reader)
{
ALU = arithmeticLogicUnit;
Parser = parser;
Reader = reader;
}
private ISystemBridge BuildBridge(IMemoryManagementUnit mmu, IArithmeticLogicUnit alu, IDisplay display, IKeyboard keyboard)
{
ISystemBridge bridge = new SystemBridge(mmu, alu, display, keyboard);
return(bridge);
}
