Yup, I have 3 different motherboards including the TAM. Tried em all. All do the same. 

I dont have PRAM batteries in any of them. 

Since I was on the accelerator subject, I grabbed my 6100 and I had another MAXPowr sitting here for the 6100/66 model. 

of course it wont work with my DOS card, as its a different connector, I decided to try it with the same exact driver disk. It worked, but its a completely different card and its a nubus mac.

So this is clearly a PCI mac issue.