RussellMc wrote: > Variables beginning I...M were implicitly declared as constants > unless explicitly declared otherwise. No, they were implicitly integers. I don't remember Fortran having symbolic constants (but it could have, it's been a while). ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist