Hi, We are trying to compile with gcc assembler some Power PC 405 test code that was developed with the Diab toolset and are getting various errors in an assembly test module. There are problems with certain machine instructions not being recognized (for example, iccci, dccci, mticcr, mtdccr), and with certain style comments (semi-colon followed by dashes) resulting in mis-parsing of subsequent (semi-colon word word) style comments (with attempts to parse 'word' as an assembly instruction). Is there a gcc assembler switch of some kind to allow for PPC405 differences? Thanks, David Goble