> > It is *possible* to do preemptive multitasking. I just can't see
> > any reason to actually use it.
> 
> I can see plenty of reasons, but often they will not outweight the added
> CPU and memory use.

My first system was a 6502 homebrew board in a wooden case. It eventually
had 18k RAM. Some PICs have a greater capacity. Theoretically I could
write a multitasking system similar to the one I wrote of the 6502.

However, I just don't think it would be worthwhile. I seem to remember
that somebody has already written a multitasking kernel for the PIC
but I've never had any occasion to look closely at it. I use my PICs
for fairly small things where I can handle pretty much everything I
need to in assembly.
-- 
D. Jay Newman           ! Author of:
jay@sprucegrove.com     ! _Linux Robotics: Building Smarter Robots_
http://enerd.ws/robots/ ! (Now I can get back to building robots.)
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist