>> Then you're screwed if the self-check part of the upload image >> got corrupted. > > You're too in this case of corrupted upload image. You have checksum and can repare the code, sorry. Still, it may be one for millions, if this is a LED controller, who would care? --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .