MODS,
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I have been writing the next version of tjtag that will make it a little less problematic to jtag, and have added some needed functionality.
I have come across a parallel jtag adapter that makes this possible. It is the lowest cost, most customizable adapter I have found, and will be supported by tjtag.
It currently has a special price until Jan. 31, so if you want to get one of these, do it soon.
here is the link, and if you decide to purchase one, and you do not use the link below please use TJTAG as the referral code.
http://www.diygadget.com/sales-tjtag-f0901acd.html
You can also find support for tjtag and this adapter in the TIAO/DIYGADGET forums, found here