Int 2F Fn 1508  - Cd-rom - Absolute Disk Read                              [d]

   AX = 1508h
   ES:BX -> buffer
   CX = drive number (0=A:)
   SI:DI = starting sector number
   DX = number of sectors to read

Return: CF set on error
       AL = error code (0Fh invalid drive,15h not ready)
   CF clear if successful

Note:  returns error 15h (not ready) under Windows95 if the starting sector
     number is less than 10h

See Also: AX=1509h