720RPM 3.5" FDDs?
cclist at sydex.com
Sun Feb 1 13:59:02 CST 2009
On 1 Feb 2009 at 19:35, Phill Harvey-Smith wrote:
> IIRC there is also a series of floppy controlers for the Sinclair QL
> that can format these disks to 3.2MB.
Many PCs (particulary those of the P1-P3 era) can handle ED drives,
as the capability is part of the normal Intel controller architecture
used in the "Super I/O" chipsets.
The Sinclair QL sounds less like a special controller (vs. one the
does standard 2.88MB format) than an alternate format (1024 x 20 x 2
x 80 as opposed to 512 x 36 x 2 x 80).
I've got a couple of boxes of NIB 3M DSED floppies--I've never found
them to be particularly reliable, which might be one of the reasons
for the format's demise.
There is also a 2.4MB 5.25" format used in some IBM systems.
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