public void Execute(Instruction instruction, ICpu cpu, IMmu mmu)
{
var n = cpu.ReadImmediateN();
cpu.Registers.F.ZeroFlag = cpu.Registers.A.Value == n;
cpu.Registers.F.CarryFlag = cpu.Registers.A.Value < n;
cpu.Registers.F.SubtractFlag = true;
// TODO: ???
cpu.Registers.F.HalfCarryFlag = (((cpu.Registers.A.Value & 0xF) - (n & 0xF)) & 0x10) == 0x10;
}
public void Execute(Instruction instruction, ICpu cpu, IMmu mmu)
{
if (cpu.Registers.F.ZeroFlag)
{
IncrementProgramCounter = true;
return;
}
var b = (sbyte)cpu.ReadImmediateN();
cpu.Registers.PC.Value += (ushort)b;
IncrementProgramCounter = true;
}
public void Execute(Instruction instruction, ICpu cpu, IMmu mmu)
{
var n = cpu.ReadImmediateN();
var originalValue = cpu.Registers.A.Value;
cpu.Registers.A.Value = (byte)(cpu.Registers.A.Value + n);
// Flags
cpu.Registers.F.SubtractFlag = false;
cpu.Registers.F.CarryFlag = originalValue + n > byte.MaxValue;
cpu.Registers.F.ZeroFlag = cpu.Registers.A.Value == 0;
cpu.Registers.F.HalfCarryFlag = (((originalValue & 0xF) + (n & 0xF)) & 0x10) == 0x10;
}
public void Execute(Instruction instruction, ICpu cpu, IMmu mmu)
{
var b = (sbyte)cpu.ReadImmediateN();
cpu.Registers.PC.Value += (ushort)b;
}
public void Execute(Instruction instruction, ICpu cpu, IMmu mmu)
{
cpu.Registers.L.Value = cpu.ReadImmediateN();
}
public void Execute(Instruction instruction, ICpu cpu, IMmu mmu)
{
var n = cpu.ReadImmediateN();
cpu.Registers.A.Value = mmu.ReadByte((ushort)(0xFF00 + n));
}