apptech wrote:

> >> Also with the new stack operation it is
> >> possible to write a real pre-emptive RTOS on it, so I like it.
>
> > And you actually have a real application where this makes any sense?  A
> > preemptive RTOS on a tiny system sounds downright silly.
>
> The sound of one dog barking.
> Life is a continuum.

The enhanced mid range could support a small RTOS. We have
been looking at the whole solution space real time support for
embedded processors and have added event driven execution
in our support for the enhanced mid range parts.

In event driven execution, execution can start when some logical
set of conditions are met. The set of conditions can be some combination
of global variable values and/or interrupt conditions. Event driven
execution in our benchmarks reduce RAM, stack size and average
execution time requirements and increase the standard deviation
of  response time.

Event driven programming simplifies a lot of real time application
programming. It significantly simplifies exception handling.

There is an internal white paper on this at Byte Craft that I will
arrange to have posted on the web site.


Regards

--
Walter Banks
Byte Craft Limited
http://www.bytecraft.com



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