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