INT 10h,  14h (20)       LCD Handler                              Convertible

    Allows the use of user-defined fonts and the mapping for the high-
    intensity attribute to a different attribute on an LCD display. This
    service is available only on the PC Convertible.

       On entry:      AH         14h
                      AL         Subservice
                      00h - Load user specified font
                                 ES:DI    Pointer to first font of font table
                                 CX       Number of characters to store (1 -
                                          256)
                                 DX       Character offset into RAM font
                                          buffer
                                 BL       Font block to load
                                          0 - Main font (block 0)
                                          1 - Alternate font (block 1)
                                 BH       Bytes per character (1 - 255)

                      01h - Load system ROM default font block
                                 BL     Font block to load
                                          0 - Main font (block 0)
                                          1 - Alternate font (block 1)

                      02h - Mapping of LCD high-intensity attribute
                                 BL     Mapping scheme
                                          0 - Ignore high-intensity
                                              attribute
                                          1 - Map high-intensity to
                                              reverse video
                                          2 - Map high-intensity to
                                              underline
                                          3 - Map high-intensity to select
                                              alternate font

       Returns:       Nothing