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AH = 45h AL = operation 00h lock media in drive 01h unlock media 02h check lock status DL = drive number
Return:
CF clear if successful AH = 00h AL = lock state (00h = unlocked) CF set on error AH = error code (see #00234)
Notes: This function is required to be supported for any removable drives numbered 80h or higher. A device may be locked even if no media is present in the drive. Up to 255 locks may be placed on a drive, and the media will not be physically unlocked until all locks have been removed
See Also: AH=41h"INT 13 Ext" - AH=46h - AH=49h - INT 15/AH=52h"INT 13 Extensions"
Category: Disk I/O Enhancements - Int 13h - I
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