> Ok so the only real > problem is the ability > to do pre-emptively multitasking I consider that a serious drawback, and I would add 8 levels is a bit short for chips that have up to 8k of code. NB I totally agree with your static stack argument. Just take a look at the bulky code produced by C18 (which uses a real SP-offset local variables). Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body