3.25-inch floppies

Tony Duell ard at p850ug1.demon.co.uk
Sat Nov 3 17:13:54 CDT 2007

> That's like the opposite of what Amiga did to add 2MB (raw) high-density
> floppy support to all models - since it wasn't feasible to get the
> installed userbase to upgrade their Paula chips, even if C= wanted to
> make a new one, they went the other way - the drive spins at half-speed
> when high-density media are inserted so that even a 1985 Paula can
> keep up with the bitstream.

I've heard of 1.2M 5.25" drives that spun at 180rpm (not the normal 
360rpm) so that a PC/XT controller could read/write 1.2M disks. I have 
never seen one, though.


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