Int 17 Fn 51  - Ax (japanese At) Printer - Jis To Shift-jis Conversion     [J]

   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

See Also: AX=5000h,AH=52h