[Coco] Trouble with OmniFlop

[Alex Evans]

On May 28, 2006, at 5:17 PM, Gene Heskett wrote:

> Alex Evans wrote:
>> On May 28, 2006, at 10:21 AM, Mike Pepe wrote:
>>> 3.5" disks are 96tpi regardless of their capacity. 5.25" disks  
>>> are 48tpi if the 40 track variety, 96tpi if the 80 track variety.
>> Actually most 3.5" floppies are 192tpi, though I do have a 40  
>> track 3.5" floppy drive which is 96tpi.
>
> wrong...
>
> In fact, all 3.5" floppy drives are 135tpi, even the oddball  
> variable speed drives some macs used in times past.  The difference  
> is that drivers wrongly assume they have to double step some  
> drives.  This is generally a symptom of the descriptor for that  
> drive being miss-configured.  If that particular drive software  
> actually uses a descriptor, rsdos and most of its ilk do not.

Sorry, but what about a very strange 40 track HP 3.5" floppy drive  
that I have?  I am pretty sure that it has the track spaced farther  
apart rather than using only the first 40 tracks.