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  Interrupt:   1Fh
 
  Title:       Pointer to Graphics Character Pattern Table
 
  See also:    Set Int 1Fh Font Pointer
 
  Description:                                                     [CGA]
 
     When initialized, vector points to the table of bit patterns for
     ASCII characters 128 through 255. BIOS Int 10h uses this table
     when displaying high-numbered characters in CGA graphics modes. At
     system startup, vector is null. To display high-numbered
     characters, the program must provide table and set 1Fh vector to
     point to it.
 
     Vector does not point to a valid routine and must not be called
     with an INT instruction.
 
     Access with Int 21h Function 35h (Get Interrupt Vector).
 
     Set new vector with Int 21h Function 25h (Set Interrupt Vector).
                                    -♦-