Hi, I have this Routerboard 493g from Mikrotik, thanks to the OpenWrt-provided patches Linux-3.14.9 runs fine on it. On top of that, I have added the necessary things to allow for zboot and indeed it can boot a compressed kernel. The only problem with that is for some reason the kernel parameters passed on by the boot loader do not make it into the kernel. I have tried printing the parameters from inside decompress.c by mimicking the way head.S stores them for later access from inside C code, but had no luck so far. For whatever reason, the variables' contents seem to be zero. Do you maybe have an idea what could be the culprit difference in between an uncompressed kernel image and the decompressor that makes the registers a0 to a4 inaccessible? Mostly due to my practically non-existing knowledge about assembly I am stuck at this point. Best wishes, Phil
