On the Amiga, there is not such thing: the encoding / decoding of the track is done by the CPU and the blitter (to speed up bit operations) and the format itself is completely open. The floppy controller hides all of this from you and presents you a floppy where tracks are nicely partitioned in sectors, etc. ![]() In a typical format (MFM), roughly 50% of the magnetic surface on a track is used for this purpose. The problem is that the read head will be less sensitive to a change if it exposed to a magnetic field that has been steady for this reason, data bits are interleaved with synchronization marks whose only role is to reverse the flux to prevent this from happening. The Amiga uses a standard floppy drive, but doesn't use a standard controller.ĭata on a magnetic media is essentially stored as flux changes over time where the controller will detect if the magnetic flux has changed over a certain period of time to make it a 0 or a 1.
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