3.5" floppy drive question(s)
Curtis H. Wilbar Jr.
rescue at hawkmountain.net
Wed Oct 15 19:42:03 CDT 2008
Steven Hirsch wrote:
> On Sat, 11 Oct 2008, Fred Cisin wrote:
>>> Also, anyone know if there if it is possible to slow the spindle speed
>>> so that 1.44M can be done on machines that only have DD data rate ?
>>> (and if so, any of the above drives capable of being slowed ?) Would
>>> that even work ?
>> Nobody has successfully used a 3.5" at 150RPM. Yet.
>> Besides the "normal" 300RPM drives, there are some 600RPM (old Sony),
>> 360RPM (NEC and a few others)
> That's not entirely correct. Amiga 3000 and 4000 machines had a
> Chinon drive mechanism that could run at 1/2 speed in order to write
> hi-density formats with an FDC chip no capable of running at high data
Is the interface on those drives compatable enough with non
Amiga equipment such that if you had one, you could it on a
'double density' controller and do HD ? Or did Amiga 'mangle'
the interface too far from standard ? Did the drive adjust speed
on it's own (by detecting the HD hole) or did the Amiga have to
tell it what speed to run ?
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