Changes
/* Motor On/Off Flipflop */
An exception are the Vortex F1-S, F1-D, M1-S and M1-D drives. (How are they different?)
The floppy disc rotates at a nominal speed of 300rpm, with some tolerance. This tolerance of the FDC has been measured by [[Roudoudou ]] to be ±12% (it worked from 220kbits/s to 283kbits/s for a reference of 250kbits/s). [https://64nops.wordpress.com/2021/09/02/a-la-decouverte-du-fdc-episode-4/ Source]
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