Hi there, I am working on an real time video playback applicaion on a mips cpu. But after my video application play a while like 5 to 10 minutes, a bus error happened. We add some debug meesage in the kernel, so we know that after the do_ade function inside the unalign.c, the bus error happens for the opcode lw or sw. So my guess is that I have an unaligned memory pointer(not in 4 byte boundary). But my puzzle is that if I have an unaligned memory pointer, it should happen at the first loop I playback, how come it happens after it plays several loops? Is there a possibility that my application's stack being trashed after a while? but I don't have recursive calls inside my application. Thanks in advance! Teresa