Re: Apple //c w/DuoDisk ?'s

[dempson@actrix.gen.nz (David Empson)]

Tony Cianfaglione <ab616@chebucto.ns.ca> wrote:

> The Apple II assigns 2 drives per slot.  The 5.25" drives are in slot 6;
> the internal in the IIc is drive 1 and it's using the left drive of your
> duo disk for drive 2.  You would probably have to hack the firmware to
> make it recognize the second duo drive but if you were successful (I
> don't know if it's even possible), chances are the IIc would no longer
> work properly.

Not possible at all.  There is only one disk controller chip, and it has
two select lines.  The IIc provides one drive select signal externally,
and the other one is used for the internal drive.

At best, you could hack together a second external drive select line
while disabling the internal drive (e.g. by disconnecting it).

Don't even think about trying to run a second external drive at the same
time as the internal one - it could damage the disk controller, and
would overload the power supply.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand