INT 2F - INTERLNK - CHECK IF REDIRECTED DRIVE AX = 5601h DX = magic value FFFFh BH = drive number (0=A:) BL = instance number (00h=any, 01h=first loaded, etc.) (CX = 0000h, see note) Return: (as for AL=00h if redirected drive) Note: some Microsoft software explicitly clears the CX register before calling this function. SeeAlso: AX=5600h,AX=5601h