AH = 18h
        DL = drive number
        CH = lower 8 bits of number of tracks
        CL = sectors per track (bits 0-5)
             top 2 bits of number of tracks (bits 6,7)
Return: AH = 00h  requested combination supported
             01h  function not available
             0Ch  not supported or druve type unknown
             80h  there is no disk in the drive
        ES:DI = pointer to 11-byte parameter table
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