floppy driver

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Hi all,

I want to write a floppy driver for my personal OS. I read the data-sheet at http://debs.future.easyspace.com/Programming/Hardware/FDC/floppy.html.
I have few question about fix drive data. I understand it is used to set speed transfer. Am I correct?


The question is: what the parameters "step rate", "head load time" and "head unload time" mean?
What are they default value? This is important for me to understand what is the default transfer rate of a floppy?


Thanks again.
Bye

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