[Coco] 720k 3.5" floppies

Phill Harvey-Smith afra at aurigae.demon.co.uk
Mon Nov 5 12:00:41 EST 2007

Joel Ewy wrote:
> Maybe I need to dig into my floppy drive stash and do some testing.  I
> don't have many real 720K drives (1.44M drives work fine in their place
> if you use 720K media -- which is also getting hard to find) but I have
> quite a few 360K and 1.2M 5.25" drives, most of which should still be in
> good working order.
> Could one use a 1.2M drive (with HD media) as a 720K drive on a CoCo?

Nope you'd want to use standard DD media, the difference between a 5.25" 
360K disk and a 5.25" 720K disk, is normally that the 360K is 40 tracks 
double sided, and the 720K is 80 track double sided, but both are double 
density and not high density. I would imagine using HD media would cause 
the same problems as for 3.5" drives.

This is asuming that the drive either defaults to standard data rate, or 
can be jumper configured to do so, which is I believe a problem for 1.2M 



Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !

"You can twist perceptions, but reality won't budge" -- Rush.

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