jtagice loopback test?

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Anyone have an in with atmel? I think they need to send out a little program for the jtagice that will let it test itself with a jumper cap. I have 3 of the darn things, and they are very fragile and cantankerous. They seem to work fine for days with mega128s and target voltage, then I move it over to one of my mega16 boards, and it doesnt detect the tgt voltage, doesnt read the tgt signature right.... doesnt read the fuses right... I must be doing something wrong....

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