URI:
       Index of /pdf/shugart/_appNotes
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   DIR /pdf/shugart
       39001-1_SA400_6800_1771_App_Note_Feb78.pdf
       39003_SA400_8080_1771_App_Note_Nov77.pdf
       Lesea_Floppy_May78.pdf
       SA1000_Data_Separator_Guide_and_Recommended_Track_Format.pdf
       SA800_Series_Double-Density_Design_Guide_1977.pdf