thanks Mike,

but ...
... a lot of (may all) things you mentioned, can be done through serial

Mike Hord wrote:
> Breakpoints.
can be done
>   The ability to monitor registers and change their values
> on the fly.
can be done
>   Single stepping through code.
can be done
>   The ability to alter the
> PC to begin execution of the code at a specific location.
can be done
>   The fact
> that you don't need to use the serial port for it, so you can debug a
> serial application with it (it DOES cost two pins, but those are two
> of the least painful pins to lose, since they have relatively few
> peripherals associated with them).  The ability to do a hardware
> reset.
>   
don't know
> FAR more powerful than serial debugging.  FAR FAR FAR more powerful.
>   
I'm willing to believe you, but I'm not convinced ;-)
Maarten Hofman mentioned stack traces, is that possible ?

Maybe it's the speed, serial debugging can be done at 1.25 MBaud,
is ICD faster ?

Are there any specifications about the ICD and maybe the commands ?

The reason why all these questions ...
... I've the wild intention to create a combination of
- programmer
- uploader for a bootloader (probably Tiny)
- high language debugger (with graph capabilities) + interaction with IDE
- tuning device (e.g. PID tuning)
- rapid prototyping board
Most of the above I've already done, except the combination of it all ;-)

Here is a first attempt of my JAL debugging
  http://oase.uci.kun.nl/~mientki/data_www/pic/jalcc/help/jalcc_icd.html

cheers,
Stef Mientki

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