I'm entirely certain that it's ROMS from the 6500 board.

I did not document exactly what I/C's I changed, I replaced alot of smaller ones that seemed like they were part of the power on circuit.

(This was the original issue with this board.) It would not do anything when you pressed the power button on the keyboard.

Even when I reset the cuda button for 10 seconds… that is when i started swappin chips from the 6500 board.

first did all the VREGS. then CUDA, then other 8 to 20 pin I/C's

3 chips I was not going to change:

1. Texas instruments chip on the bottom BGA

2. ATI Video chip - too many legs

3. Big Lucent chip - too many legs

Then, When I finally got it to power on, It would sit there, no bong, no video, no boot, just power up at that point…

So that is when I heat gun'd off the ROMS from the 6500 and soldered them on the Proto TAM.

the Proto TAM did not have any ROM's on there just tinned pads. And a ROM Simm.