On 09/27/2013 08:51 PM, Bob Armstrong wrote: They make use of a custom CPU, or perhaps just a state machine. Got prints? That's true of the VT52, however the logic in the VT62 is completely different. I don't know anything about it, but just looking at the logic board you can see that it's not even close to a 52. I've no idea what's in the 62. I am pretty sure the VT62 is "more of the same". No hardware in common, but a similar overall architecture. I could be mistaken, however, and would love to know more, but information about that model is very tough to come by. I suppose it's remotely possible that the VT131 speaks the same protocol, and it's documented. One could try based on that...the worst that could happen is that it won't work, right? -Dave -- Dave McGuire, AK4HZ New Kensington, PA