INT 17 - AX (Japanese AT) PRINTER - JIS to Shift-JIS CONVERSION
        AH = 51h
        DX = 2-byte JIS code
Return: DX = shift-JIS value or 0000h on error
Note:   one of AH=51h and AH=52h converts from JIS (Japanese Industry Standard)
          characters to Shift-JIS characters, and the other performs the
          opposite conversion
SeeAlso: AH=52h