> D. Jay Newman wrote:
> >> Why is it not possible at the very least by temporarily disabling
> >> interrupts?  Also the 30F do have a bit test and set instruction.
> >
> > It is *possible* to do preemptive multitasking. I just can't see
> > any reason to actually use it.
> 
> But the question wasn't about preemptive multitasking.  It was about atomic
> test and set capability.

I'm sorry; I forgot that I was responding to one of *your* posts.

You are correct, interrupts can be disabled to do an atomic test/set on
pretty much any microcontroller. This, of course, is highly useful to
creating a preemptive operating system.
-- 
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.)
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