The I/O pins of FDD have internal 2kOhm pull-up resistors. There is a 5V logic in floppy drive, same as in Arduino UNO. HD has a write protect window and window on the another side that denotes HD propertyĮD: there exist also 2.88MB extended density floppy with window located somehow above usual position of window on HD medium, but I have never had such floppy in my hands. You can get more familiar with the concept of CHS on javascript calculator Tracks are numbered 00-79 where Track 00 is the outermost (the "first track"). There are two common 3.5" media of types: "dual density" DD and "high density " HD:ĭD: 2 x 80 x 18 x 512 B = 1 474 560 B = 1 440 x 1024 B = 1440 kB = 1.44 MB, (most common) There is a magnetic head that reads the transitions of a magnetic flux and they are (somehow) interpreted as logic states. Speed of the rotation of disk is 5 times per second. The data are stored on magetic disc, which is beeing rotated during the reading process. See info on the bottom of the description.įloppy disk is a magnetic medium.
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