Category: <b>disk I/O enhancements</b>
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<pre><b>INT 13 - SyQuest - DOOR LATCH/DOOR BUTTON DETECT</b>

	AH = 1Fh
	AL = subfunction
	    00h allow media removal
	    01h prevent media removal (lock door)
	DL = drive ID (bit 7 set for hard disks)
Return: CF clear if successful
	    AH = 00h
	CF set on error
	    AH = error code
		00h successful
		01h invalid function request
		80h timeout
		DDh media change requested
SeeAlso: AH=12h"SyQuest",AH=13h"SyQuest",AH=59h"SyQuest"
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