public void OP_CREF()
{
//Console.Error.WriteLine("OP_CREF");
GpuState->ColorTestState.Ref.R = (byte)Extract(8 * 0, 8);
GpuState->ColorTestState.Ref.G = (byte)Extract(8 * 1, 8);
GpuState->ColorTestState.Ref.B = (byte)Extract(8 * 2, 8);
GpuState->ColorTestState.Ref.A = 0x00;
//Console.Error.WriteLine("CREF: {0}", GpuState->ColorTestState.ToStringDefault());
}