On 9/3/2012 7:48 PM, D Finnigan wrote:
Charlie wrote:On 9/3/2012 3:53 PM, D Finnigan wrote:As far as I know, only Apple computers had variable-speed 3.5" floppy drives. These were manufactured by Sony. The Apple drives used GCR at their lowest level, whereas the IBM drives used MFM.I believe the 3.5" Apple drive can read/write either GCR or MFM if the controller is designed for both.That would be the SuperDrive, introduced in 1989 with the Mac SE/30.
No I am referring to the 3.5" Apple drive (the one used with an Apple IIgs) not the SuperDrive. I don't own a SuperDrive but I used my 3.5" Apple drive with my PC Transporter for many years. My point is that the drive *can* read/write both GCR and MFM. It cannot read/write 1.4MB disks.
Charlie