avr butterfly and jtag

From: Mark Andrew (markwandrew_at_hotmail.com)
Date: 05/29/04 

Date: 29 May 2004 12:41:44 -0700

I have bought an AVR Butterfly as my first step in exploring the
wonderful world of microcontrollers, and have worked out how
to compile and load programs into it using WinAVR, AVR Studio
and the RS232 connection. And all for € 30!

Now I want to try my hand at on board debugging. Do I just buy
the JTAG dongle for € 45 and talk through it to the Butterfly
with AVR Studio? I can hardly believe it is that simple.
Why does the JTAG ICE cost
so much more? Am I missing something here?

Is there some issue with the fact that the dongle expects 5 volts from
the target, but the Butterfly only takes up to 4.5 volts external power?

Thanks for any advice 

--
Mark
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