Wouter van Ooijen wrote: > If you go for the easy approach: each routine must run up to a fixed > point (so you know it was not executing a subroutine, and you know where > it was) you have reduced your multitasking to a set of finite-state > machines, which can indeed be done on a 14-bit core. Google 'pic > pumpkin'. This sounds pretty much like the cooperative multitasking Olin (and others) were talking about. Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist