I just have an ixp1200 to develope some applications. Through Intel provides its MicroACE as an default framework for the development, there's some thing that can not fitted into it well; then, following MicorACE becomes painful. Yet, Intel doesn't provide any documents on how to get rid of MicroACE. There's not a clear document on the APIes, which can be used by the application to directly inject microcodes into microengines, and trigger the operation.