The CoCo wiki project was started on October 29, 2004. --OS-9 Al

From CoCopedia

Written in the summer of 1985 by Dave Lewis, this replacement for the Radio Shack CCDisk OS-9 device driver module provides support for:

• Single and double sided 5 1/4" floppy disk drives
• 40 and 80 track disks and drives
• Faster head step rates than the default 30 mSec