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Int 0x21, AH=0x73

2173 INT 21 - MS-DOS 7 - DRIVE LOCKING AND FLUSHING
217302 INT 21 - Windows95 - FAT32 - "Get_ExtDPB" - GET EXTENDED DPB
217303 INT 21 - Windows95 - FAT32 - GET EXTENDED FREE SPACE ON DRIVE
217304 INT 21 - Windows95 - FAT32 - Set DPB TO USE FOR FORMATTING
217305CXFFFF INT 21 - Windows95 - FAT32 - EXTENDED ABSOLUTE DISK READ/WRITE

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