>i've downloaded the arcdiag-0.2 and served it via tftp. but the RM300E don't like that file. >it only says "Bad magic number". what does this mean (little/bigendian)? >the same error-message appears when the to load mipsel boot-images. Do you have an originas OS (SINIX ?) supplied with this server ? Try a `file` GNU utility: $ file <ANY_BINARIES_FROM_THE_ORIGINAL_OS> or $ file <KERNEL_IMAGE_FROM_THE_ORIGINAL_OS> Some modern loaders requires ELF binaries (not COFF) so you should know a full binary file format to load (ELF/COFF/little/bigendian). -- -=AV=-