[Coco] 3.5 in 720K vs 1.4 meg floppy diskettes

[KnudsenMJ at aol.com]

In a message dated 12/10/03 11:08:11 PM Eastern Standard Time, 
bugster at cedarcomm.com writes:

> 1.44MB 3.5" Floppy drive acting as a 720k drive.....works great!  I've put
>  together several dual floppy drives with this configuration and it works
>  great with DD 720k floppy disks.  My current config at home is this
>  configuration (/DO is a 360k 5.25" floppy and /D1 is a 1.44MB Floppy).  
Have
>  yet to have a DD 720k disk fail on me (even formatted as 160k in RS-DOS!).

This makes sense, since the drive electronics sense whether it's a DD or HD 
diskette in there and adjusts the write current accordingly.  But keep reading 
...

>  Putting a 1.44MB floppy disk in and formatting it as double or single
>  density (720k or 160k under RSDOS)....sucks!  Very unreliable. 

Hmmm, sounds like the drive fails to upgrade the write current for the HD 
floppy.  Maybe the OS has to help out in this, since you seem to get better 
results under OS-9 than BASIC.  Or did I miss something?  --Mike K.