public void Execute()
{
reg[17] = 0x00FFFF00;
reg[18] = 0x0000FFFF;
target = new XorInstruction(16, 17, 18);
target.Execute(ref pc, mem, reg);
Assert.AreEqual(0x00FF00FF, reg[16]);
Assert.AreEqual(0x4, pc);
}
