"Jay West" &lt;jwest(a)kwcorp.com&gt; wrote: Take a look at <http://www.spies.com/~arcade/TE/> -- there are links there to the documentation for the 29A and Unipak 2. Mine seems to think it is OK (passes self test), but it does weird things sometimes, especially when I switch from reading one device type to another. Looks like when I do that, I should cycle power and put it back in remote mode, else the next read will either fail with an error or fail silently by only reading part of the device. So, trust but verify. -Frank McConnell