On Wed, 13 Feb 2013, James Lynch wrote:
I changed the software controller parameter on my
Zenith Z-100 to get 96
TPI on the 5.25 inch drives. Simple change, although had to add a thin
metal shield on top of drive because of interference from monitor.
I had to do that when I mounted a full height floppy drive in the "tuner"
space of the TRS80 model 1 monitor. "Mu-metal"
I don't see any reason why it would be different for 40 tracks or 80
tracks on the drive.