720k 3.5" on PC6300?

[Richard Rowland]

In article <wbDmBcK00VI80kN4pe at andrew.cmu.edu>, dd26+ at andrew.cmu.edu (Douglas F. DeJulio) writes:
> I have an old PC6300 with the 1.43 ROMs.  It currently has two 5" 360k
> drives, but I want to replace one of them with a 3.5" 720k drive.  If
> I make *both* drives 720k, I can flip a dipswitch on the motherboard
> and all is supposed to work well.  I just one *one* of them to be
> 720k.  Can anyone offer any advice on this?
> -- 
> Doug DeJulio
> dd26 at andrew.cmu.edu

there is no need to change the switch settings on the motherbd. Simply install  the 720K FDD as either A or B, then use the DRIVPARM feature in DOS (3.3 & up)  to inform DOS that the physical drive is not a 360K FDD, but a 720K FDD.