Function 440Eh (68-14)   IOCTL: Get Logical Drive                     DOS 3.2

Returns the drive letter used most recently for block devices that
have more than one logical drive letter.

On entry:      AH         44h
AL         0Eh
BL         Drive number (0=default, 1=A, etc.)

Returns:       AL         00h if only one letter is assigned to the
block device
Drive letter used most recently (1 = A,
2 = B, etc.)
AX         Error code, if CF is set

                                                                          

Some block devices use more than one drive letter to refer to the same
device.  For example, the floppy disk drive on a system with only one
floppy disk drive can be referred to as either A: or B:.  This
function tells both if more than one drive letter refers to a device
and, if so, which drive letter was used most recently.

Notes:         Function 440Fh can be used to set the most-recent
drive letter used for a device.

See also: 44h
See also: 440Fh

440Eh (68-14) IOCTL: Get Logical Drive >= DOS 3.2