3.5 disk for att 6300?

[Hank Farber]

I need to know if and how I can add a 3.5 inch floppy drive (preferable 1.44
Mbyte) to my ATT 6300 computer.  It would have to be external because I
already am using both drive bays (1 360k floppy and one hard disk).  Can I use
the existing controller (on the Motherboard), or do I need an additional
controller?  What version of the operating system would be needed.

Thanks in advance for your help.

Hank Farber