Hi, I use a DSP and don't no whitch cpu_flags i must set. When i use the XVID_CPU_FORCE or the XVID_CPU_CHKONLY flags the compiler tell me the message: Attempt to fetch an instruction from iop space! My problem is, i don't no in what functions the flags exactly used! And what is the exactly role of the cup_flags unless to set the type of the CPU! bye