[Coco] 5 1/4" drive

[J.P. Samson]

On Apr 7, 2009, at 9:14 AM, Gene Heskett wrote:
> On Tuesday 07 April 2009, Bill wrote:
>> Refresh my memory, please. Can an 80 track 1.2M 5 1/4" drive be  
>> installed
>> into an FD-502 case and work correctly? Will it act like a  
>> "standard" floppy
>> drive using the stock chip in the controller?
>
> Yes and no.  If you can locate the jumper on the drive that slows  
> the disk
> from the 360 rpm the 1.2meg disk spins, to the 300 rpm that all  
> other disk
> formats spins, then they can, under os9/nitros9 only, be used for  
> 720k drives.
> I have been doing so for many years.

What do you use for disks in this scenario?  I would think you'd need  
5-1/4" DSQD (double-sided, quad-density) floppies to ensure  
reliability.  These are ultra-rare (I only have a single 10-pack of  
them in my collection).

-- JP