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AX = 440Fh BL = physical drive number (00h=default,01h=A:,etc))
Return:
CF set on error AX = error code (01h,0Fh) (see #01680 at AH=59h/BX=0000h) CF clear if successful drive now responds to next logical drive number
Notes: Maps logical drives to physical drives, similar to DOS's treatment of
a single physical floppy drive as both A:
And B:. DR DOS 3.41-5.0 DRIVER.SYS does not support drive mapping and thus always returns an error on this function
See Also: AX=440Eh - INT 2F/AX=122Bh
Category: DOS Kernel - Int 21h - D
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