INT 10 - VIDEO - Realtek RTVGA - TEXT-MODE CHARACTER GENERATOR FUNCTIONS
        AH = 11h
        AL = 07h load user-specified paterns and recalculate mode parms
                 parameters are the same as for AL = 10h
        AL = 08h load monochrome patterns (8x14) and recalculate mode parms
                 parameters are the same as for AL = 11h
        AL = 09h load ROM 8 by 8 double-dot patterns and recalculate mode parms
                 parameters are the same as for AL = 12h
        AL = 0Bh load ROM 8x16 character set (VGA) and recalculate mode parms
                 parameters are the same as for AL = 14h
Note:   these functions should only be called under the same conditions as
          AL=1xh (see entry above)
SeeAlso: AH=11h

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