Editing Floppy disk drive interface (section)

=== 8 inch ===
The de facto standard 8 inch FDD interface is based upon the Shugart Associates models SA800/801<ref name="OEM_SA800"/> FDDs and models SA850/851<ref name="OEM_SA850"/> FDDs.<ref name="Porter_1982"/>{{rp|page=171|quote=SA800, SA801, SA850, SA851, Industry standard for size and interface}} The signal interface uses a 50-pin PCB [[edge connector]] which mates to a flat ribbon cable connector. Separate connectors are provided for both [[Alternate current|AC]] and [[Direct current|DC]] power, as many 8 inch drives used AC spindle motors.<ref name="OEM_SA800"/><ref name="OEM_SA850"/>