Creating 5.25" floppies

Chuck Guzis cclist at
Mon Aug 17 18:57:39 CDT 2015

On 08/17/2015 04:09 PM, Fred Cisin wrote:

> There are plenty of PCs that can run ImageDisk and/or Teledisk that
> CAN NOT do single density (FM).  Neither of those pieces of software
> alter the hardware capabilities of the machine.

It's odd, but later PC floppy support is often better in the FM support 
mode.  For example, a Socket AM2 board is more likely to support FM 
than, say, Socket 7 one.

ISA SCSI adapters with onboard floppy support are always a rich source 
of good FDCs--in particular Future Domain, Ultrastor Adaptec and DTC and 
others  All tended to use an NSC DP8473 or a variation of it.  That 
means that you actually have 4-floppy support should you need it, albeit 
with no BIOS support (which doesn't matter to TD, AD or IMD).  I've 
modified a couple of such controllers to support a third drive on a 
single 34-conductor cable.

For whatever it's worth,


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