You can find descriptions of these special instructions in the documentation that came with MPLAB. Also, inside MPLAB itself is a pretty decent help file system. Look under "MPASM Help", "Instruction Sets", "14-bit Core Instructions", "12-bit/14-bit Special Instructions". --Andrew _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics