290166.pdf
82077A CHMOS Floppy Disk Controller
Technical document describing Intel's 82077A single-chip floppy disk controller
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29047403.pdf
82078 CHMOS Floppy Disk Controller
Technical document describing Intels 82078 single-chip floppy disk controller
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floppy.htm
Programming Floppy Disk Controllers 
A quick tutorial on using standard FDCs, their registers and available commands.
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