Int 13/AH=45h

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IBM/MS INT 13 Extensions - LOCK/UNLOCK DRIVE

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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