These actually are the later boards from the ones with the tether, they move the BEEP along at a good clip, not like the original board.
This is the original board that shipped with the early 2000 BEEP. This is also the board that runs them at a snail's pace.
If someone really wanted to upgrade their BEEP, I could take the tethers, etc. out of the chassis these were in, I'm going to remove them before I use them anyway as I'll be doing command in them.