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  Description:  Set Int 43H for ROM 8-by-8 Font      [EGA] [MCGA] [VGA]
 
  Sets the vector for Int 43H to point to the ROM BIOS default 8-by-8 font
  and updates the video ROM BIOS data area. The video controller is not
  reprogrammed.
 
  Input                                                 Output
  ══════════════════════════════════════════            ═══════
  AH=11H                                                Nothing
  AL=23H
  BL=character rows specifier
     00H if user specified (see register DL)
     01H=14 (0EH) rows
     02H=25 (19H) rows
     03H=43 (2BH) rows
  DL=character rows per screen (if BL =00H)
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