Int 13 Fn 18  - Disk - Set Media Type For Format (at Model 3x9,xt2,xt286,  [B]

   AH = 18h
   DL = drive number
   CH = lower 8 bits of highest cylinder number (number of cylinders - 1)
   CL = sectors per track (bits 0-5)
        top 2 bits of highest cylinder number (bits 6,7)

Return: AH = status
       00h requested combination supported
       01h function not available
       0Ch not supported or drive type unknown
       80h there is no disk in the drive
   ES:DI -> 11-byte parameter table

See Also: AH=05h,AH=07h,AH=17h