Here is what I recall from 20 years and 3 jobs ago
the label on the board says 1994
we learned of the existence of the more detailed internal TPU manual from Motorola. After a lot of begging and cajoling we were able to get a copy of that one. It was very detailed and cleared up issues we had with the regular TPU manual.
yes, exactly! But I believe the internal copy was provided with the EVM-kit (an old catalog says it was 900 USD in 1995)
I have already successfully created a TPU-device, but there are some obscure aspects that need to be clarified, and the manual, the internal copy, could help