Disclaimer: I've never worked with this CPU.

> :TOGGLE
> FF PORTA C!
> 00 PORTA C!
> ;
>
> Is there a divide down for the avr's data bus? Or is the
> interpreter really taking that long to execute the code?

There is overhead involved to pass the message to the target to
execute TOGGLE. However, once it begins actually executing TOGGLE,
there shouldn't be any.

> How much faster would
> :TOGGLE
> 00 PORTA FF PORTA C! C!
> ;
> be?
>
> Should I just write these bits in assembler?

Run "SEE TOGGLE" for the two versions of TOGGLE you have and see
what code they generate.

If it's really that time-critical, I'd write it in assembly. It
should be simple enough to write, and you'll take all the guesswork
out of it.

--
Ron Oliver <roliver_at_openesque.com>
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