[Coco] Disk Controllers

[billg999 at cs.uofs.edu]

> One of the prominent differences is that the 3022 controller requires
> 12vdc
> besides the usual 5vd power, only the CoCo 1 and the MultiPak interface
> provide such, so out of the box this controller can not be used on a CoCo
> 2
> or 3.

Yeah, I had seen that somewhere on the net.  Luckily I have two MPI's
for my two 3022's.

>       Then there are the other technical subtleties. You can read more
> about this on:
>
> http://www.cocopedia.com/wiki/index.php/26-3022
> http://www.cocopedia.com/wiki/index.php/FD-502_%2826-3133%29

I had seen these, too, but was looking for something more technical,
I guess.

Now, let me throw out two more questions for the experts here.

If I wanted to replace the ROM in the FD-502 with one that had HDB and
drivewire for use on a COCO-2 with a Glenside IDE, which image should I
use?

And now, the big one.  Is the controller used in any of these carts
able to do 8" drives?  Yes, I know the wiring is different but I have
a couple of these cute little cards that let you hook 8" drives up to
the floppy connector on a PC.  That means the it takes care of the
different pin locations and the extra 16 pins.  The question is can
the controller handle it?

bill