public void TestCPL(byte a, byte result)
{
var device = TestUtils.CreateTestDevice();
var cpu = device.CPU;
var alu = new ALU(cpu);
cpu.Registers.A = a;
alu.CPL();
Assert.Equal(result, cpu.Registers.A);
Assert.True(cpu.Registers.GetFlag(CpuFlags.SubtractFlag));
Assert.True(cpu.Registers.GetFlag(CpuFlags.HalfCarryFlag));
}