INT 10 - VIDEO - GRAPH-MODE CHARGEN - SET ROM 8x8 DOUBLE-DOT CHARS (PS,EGA,VGA)
        AX = 1123h
        BL = row specifier (see AX=1121h)
Notes:  this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
        UltraVision v2+ sets INT 43 to the appropriate font on this call
SeeAlso: AX=1112h,AX=1120h,AX=1121h,AX=1122h,AX=1124h,AX=1129h,INT 1F,INT 43

.