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2F121A

Category: DOS kernel
Flags: Undocumented function

INT 2F - DOS 3.0+ internal - GET FILE'S DRIVE

	AX = 121Ah
	DS:SI -> filename
Return: AL = drive (0 = default, 1 = A:, etc, FFh = invalid)
	DS:SI -> filename without leading X: (if present)
SeeAlso: INT 21/AH=19h,INT 21/AH=60h

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