Interesting thread.
I will address the white elephant in the room though:
Why was a machine with mostly Motorola parts NOT using a Motorola DSP?
I am very lucky to own both a Quadra 660AV and an Atari Falcon (both the different DSPs discussed) and have often wondered why the Apple (and now the proto A3000) used a non Motorola DSP.
Is the 3210 much better than the 56xxx line?
Its a shame really, as you could have picked Dougs (DML) brains about his Quake 2/Halflife Falcon DSP code.
There are a few 3210 bits in the wild (mainly sound processing software and Photo manipulation) on the Apple machine, but you are on your own coding for that beast otherwise.
(As an aside, I did try to read/understand the MC560001 PRM many years ago, when I was a teenager...It wasnt pretty).
