Int 10h, 1100h          Load User-Specifed Alpha Font          EGA, MCGA, VGA

    Changes font to user-defined font in text mode.

        Entry   AX    = 1100h
                BH    = Bytes per character
                BL    = Font block to load (EGA/MCGA 0..3 | VGA 0..7)
                CX    = Number of characters
                DX    = Number of first character
                ES:BP = Pointer to character bitmaps

        Return  Nothing